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    <title>
      Form S-8 for LTIP
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>As
      filed
      with the Securities and Exchange Commission on June 29,
      2006</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 290pt; TEXT-INDENT: 10pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Registration
      No. 333-___________________</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>UNITED
      STATES</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>SECURITIES
      AND EXCHANGE COMMISSION</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>WASHINGTON,
      D.C. 20549</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><img src="catlogo.jpg" alt=""><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Arial"><strong>FORM
      S-8</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">REGISTRATION
      STATEMENT UNDER </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">THE
      SECURITIES ACT
      OF 1933</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Arial"><strong>CATERPILLAR
      INC.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Exact
      Name of
      Registrant as Specified in Its Charter)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="47%">
              <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Delaware</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(State
                of
                Incorporation)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td valign="top" width="47%">
              <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>37-0602744</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: -18pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(IRS
                Employer
                Identification No.)</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="47%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="47%">
              <hr style="COLOR: black" noshade size="2" width="100%">&#160;</td>
          </tr>
          <tr>
            <td colspan="2" valign="top" width="95%">
              <div style="DISPLAY: block; MARGIN-LEFT: 35pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>100
                NE Adams Street</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 35pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Peoria,
                Illinois 61629</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Address
                of
                Principal Executive Offices)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td colspan="2" valign="top" width="95%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 40pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 36pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Caterpillar
      Inc. 2006 Long-Term Incentive Plan</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Full
      Title of the
      Plan)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>J</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>ames
      B.
      Buda</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Vice
      President, Secretary and General Counsel</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Caterpillar
      Inc.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>100
      NE
      Adams Street</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Peoria,
      Illinois 61629-7310</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>(309)
      675-4429</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 27.35pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Name,
      Address and
      Telephone Number, Including Area Code, of Agent for Service)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 30pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 27.35pt" align="center"><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="left">
      <table border="0" bordercolor="#808080" cellpadding="0" cellspacing="0" width="100%">

          <tr bgcolor="#cceeff">
            <td colspan="5" valign="bottom" width="88%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>CALCULATION
                OF REGISTRATION FEE</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr bgcolor="white">
            <td colspan="5" valign="top" width="88%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr bgcolor="#cceeff">
            <td valign="bottom" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Title
                of securities to be registered</strong></font></div>
            </td>
            <td valign="bottom" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Amount
                to be registered</strong></font></div>
            </td>
            <td valign="bottom" width="18%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Proposed
                maximum offering price per share</strong></font></div>
            </td>
            <td valign="bottom" width="19%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Proposed
                maximum aggregate offering price</strong></font></div>
            </td>
            <td valign="bottom" width="14%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Amount
                of</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>registration
                fee</strong></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><sup><strong>(2)</strong></sup></font></div>
            </td>
          </tr>
          <tr bgcolor="white">
            <td valign="top" width="21%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="16%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="18%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="19%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="14%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr bgcolor="#cceeff">
            <td align="left" valign="top" width="21%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Arial">Common
                Stock,
                par value $1.00</font></div>
            </td>
            <td valign="top" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Arial">20,000,000
                shares <sup>(1)</sup></font></div>
            </td>
            <td valign="top" width="18%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Arial">$72.01<sup>(3)</sup></font></div>
            </td>
            <td valign="top" width="19%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Arial">$1,440,200,000</font></div>
            </td>
            <td valign="top" width="14%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 9pt; FONT-FAMILY: Arial">$154,101.40</font></div>
            </td>
          </tr>
          <tr bgcolor="white">
            <td align="left" valign="top" width="21%">&#160;</td>
            <td valign="top" width="16%">&#160;</td>
            <td valign="top" width="18%">&#160;</td>
            <td valign="top" width="19%">&#160;</td>
            <td valign="top" width="14%">&#160;</td>
          </tr>
          <tr bgcolor="white">
            <td align="left" colspan="5" valign="top" width="88%">
              <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: -15pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Arial">(1)&#160;
                Together with an indeterminate number of additional shares that may
                be
                necessary to adjust the number of shares offered pursuant to the
                Caterpillar Inc. 2006 Long-Term Incentive Plan (the "Plan") as a
                result of
                a stock split, stock dividend or similar adjustment of the outstanding
                common stock pursuant to Rule 416(a).</font></div>
            </td>
          </tr>
          <tr bgcolor="#cceeff">
            <td align="left" colspan="5" valign="top" width="88%">
              <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: -15pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Arial">(2)&#160;
An
                aggregate of 17,600,000 shares (as adjusted to reflect all stock
                splits
                and dividends to date) are being carried forward from those shares
                previously registered by Registration Statements on Form S-8 (Nos.
                333-03609, 333-41464, 333-98197, and 333-115837). Registration fees
                of
                were already paid with respect to the shares registered in those
                filings.
                The previously registered shares being carried forward, together
                with the
                shares registered hereby, represent the total number of shares reserved
                for issuance under the Plan.</font></div>
            </td>
          </tr>
          <tr bgcolor="white">
            <td align="left" colspan="5" valign="top" width="88%">
              <div style="DISPLAY: block; MARGIN-LEFT: 15pt; TEXT-INDENT: -15pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Arial">(3)&#160;
                Estimated solely for the purposes of calculating the registration
                fee,
                computed pursuant to Rules 457(c) and (h) under the Securities Act
                of
                1933, as amended, on the basis of the average of the high and low
                sales
                prices of a share of Caterpillar Inc. Common Stock, as reported on
                the New
                York Stock Exchange - Composite Transactions System on June 22,
                2006.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div>
      <table cellpadding="0" cellspacing="0" id="list" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td align="right" style="width: 0pt;">&#160;</td>
            <td>
            </td>
          </tr>

      </table>
    </div>
    <div>&#160;</div>
    <div>
      <div>
        <hr style="COLOR: silver" align="left" noshade size="2" width="100%">
      </div><br></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>PART
      I</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>INFORMATION
      REQUIRED IN THE SECTION 10(a) PROSPECTUS</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      1.
      Plan Information.*</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      2.
      Registrant Information and Employee Plan Annual
      Information.*</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">*This
      Registration
      Statement relates to the registration of 20,000,000 shares of common stock,
      par
      value $1.00 per share, of Caterpillar Inc. (the "Company") to be offered from
      time to time pursuant to the Caterpillar Inc. 2006 Long-Term Incentive Plan
      (the
      "Plan"). Pursuant to Registration Statements filed by the Company on Forms
      S-8
      (Registration No. 333-03609 filed May 13, 1996; No. 333-41464 filed July 14,
      2000; No. 333-98197 filed August 15, 2002; and No. 333-115837 filed on May
      25,
      2004), the Company previously registered 128,000,000 shares of common stock
      (as
      adjusted to reflect all stock splits and dividends to date) for use under the
      Caterpillar Inc. 1996 Stock Option Plan. Of these previously registered shares
      of common stock, 17,600,000 shares are being carried forward and remain
      available for issuance under the Plan.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">As
      permitted by
      Rule 428 under the Securities Act of 1933, as amended (the "Securities Act"),
      this Registration Statement omits the information specified in Part I of Form
      S-8. The documents containing the information specified in Part I will be
      delivered to Plan participants as required by Rule 428(b). Such documents are
      not being filed with the Securities and Exchange Commission (the "Commission")
      as part of this Registration Statement or as prospectuses or prospectus
      supplements pursuant to Rule 424(b) under the Securities Act.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><br>&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>PART
      II</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>INFORMATION
      REQUIRED IN THE REGISTRATION STATEMENT</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      3.
      Incorporation of Documents by Reference.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">The
      following
      documents have been filed by Caterpillar Inc. ("Caterpillar," the "Registrant"
      or the "Company") with the Commission pursuant to the Securities Exchange Act
      of
      1934, as amended (the "Exchange Act") and are hereby incorporated by reference
      in this Registration Statement:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(a)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Annual Report on Form 10-K (File No. 1-768) for the fiscal year ended
                December 31, 2005, filed with the Commission on February&#160;22, 2006 and
                amended on Form 10-K/A on May 31,
                2006;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(b)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Quarterly Report on Form 10-Q (File No. 1-768) for the fiscal quarter
                ended March 31, 2006, filed on May 3,
                2006;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(c)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Current Reports on Form 8-K (File No. 1-768) filed with the Commission
                on
                June 14, 2006 (two filings);</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(d)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                June 8, 2006;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(e)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                May 16, 2006 (incorporates Item 8.01
                only);</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(f)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                February&#160;22, 2006;</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(g)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                February&#160;10, 2006 (incorporates Item 8.01 only);
                and</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">

          <tr valign="top" style="line-height: 1.5;">
            <td style="width: 30pt;">&#160;</td>
            <td style="width: 15pt;">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(h)</font></div>
            </td>
            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">The
                description of Caterpillar's Common Stock contained in Form S-3,
                filed
                with the Commission on May 6, 1991 (Registration No. 33-40393), including
                any amendment or report filed with the Commission for the purpose
                of
                updating such description.</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">1</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">
      <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
        <hr style="COLOR: silver" align="left" noshade size="2" width="100%">
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">*In
      addition, all
      documents subsequently filed by the Company with the Commission pursuant to
      Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act and prior to the filing
      of a post-effective amendment which indicates that all securities offered hereby
      have been sold or which deregisters all securities then remaining unsold, shall
      be deemed to be incorporated by reference in this Registration Statement and
      to
      be a part hereof from the date of filing of such documents. Any statement
      contained in a document, all or a portion of which is incorporated or deemed
      to
      be incorporated by reference herein, shall be deemed to be modified or
      superseded for purposes of this Registration Statement to the extent that a
      statement contained herein (or in any other subsequently filed document which
      also is or is deemed to be incorporated by reference herein) modifies or
      supersedes such statement. Any such statement so modified or superseded shall
      not be deemed, except as so modified or superseded, to constitute a part of
      this
      Registration Statement.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      4.
      Description of Securities.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Not
      applicable.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      5.
      Interests of Named Experts and Counsel.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Not
      applicable
</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      6.
      Indemnification of Directors and Officers.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Section
      145 of the
      General Corporation Law of Delaware authorizes the Company to indemnify its
      directors and officers under specified circumstances. Article V of the Company's
      Bylaws provides in effect that the Company shall provide certain indemnification
      to such persons. Article Ninth of the Company's Restated Certificate of
      Incorporation provides that a director shall not be liable to the Company or
      its
      stockholders for any breach of fiduciary duty except in certain circumstances.
      The Company has purchased directors' and officers' liability insurance in the
      amounts and subject to the conditions set forth in such policies.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      7.
      Exemption From Registration Claimed.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Not
      applicable
</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      8.
      Exhibits.</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">The
      following is a
      complete list of exhibits filed as a part of this Registration
      Statement:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Exhibit
                No.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="64%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Description</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="16%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="64%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr>
            <td valign="top" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">4.1</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="64%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Caterpillar
                Inc. 2006 Long-Term Incentive Plan (included as Exhibit A to the
                Company's
                Proxy Statement for its 2006 Annual Meeting of Stockholders filed
                with the
                Commission on April 17, 2006 and incorporated herein by
                reference)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="16%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">23.1</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="64%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Consent
                of
                PricewaterhouseCoopers LLP</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">2</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">
        <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
          <hr style="COLOR: silver" align="left" noshade size="2" width="100%">
        </div>
      </div><br><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Item
      9.</strong></font><font id="TAB2" style="COLOR: black; LETTER-SPACING: 45.4pt">&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Undertakings</strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font size="2" face="Arial"><br></font>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">

            <tr>
              <td align="left" valign="top" width="4%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(a)</font></div>
              </td>
              <td align="left" colspan="3" valign="top" width="86%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">The
                  undersigned Registrant hereby undertakes:</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(1)</font></div>
              </td>
              <td align="left" colspan="2" valign="top" width="82%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">To
                  file,
                  during any period in which offers or sales are being made, a
                  post-effective amendment to this Registration Statement:</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(i)</font></div>
              </td>
              <td align="left" valign="top" width="78%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">to
                  include
                  any prospectus required by Section 10(a)(3) of the Securities Act
                  of
                  1933;</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
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              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">
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                  reflect in
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                  date of the
                  Registration Statement (or the most recent post-effective amendment
                  thereof) which, individually or in the aggregate, represent a fundamental
                  change in the information set forth in the Registration Statement;
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            </tr>
            <tr>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">
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                  include
                  any material information with respect to the plan of distribution
                  not
                  previously disclosed in the registration statement or any material
                  change
                  to such information in the registration statement;</font></div>
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            </tr>
            <tr>
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              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" colspan="2" valign="top" width="82%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>provided,
                  however</em></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">,
                  that if the
                  information required to be included in a post-effective amendment
                  by
                  paragraphs (1)(i) and (ii) above is contained in periodic reports
                  filed
                  with or furnished to the Commission by the registrant pursuant
                  to Section
                  13 or Section 15(d) of the Securities Exchange Act of 1934 that
                  are
                  incorporated by reference in this Registration Statement, paragraphs
                  (1)(i) and (ii) shall not apply.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            <tr>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(2)</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">That,
                  for the
                  purpose of determining any liability under the Securities Act of
                  1933,
                  each such post-effective amendment shall be deemed to be a new
                  registration statement relating to the securities offered therein,
                  and the
                  offering of such securities at that time shall be deemed to be
                  the initial
                  bona fide offering thereof; and</font></div>
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            <tr>
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              <td align="left" valign="top" width="4%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(3)</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">To
                  remove
                  from registration by means of a post-effective amendment any of
                  the
                  securities being registered which remain unsold at the termination
                  of the
                  offering.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
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            </tr>
            <tr>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(b)</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">The
                  undersigned Registrant hereby undertakes that, for purposes of
                  determining
                  any liability under the Securities Act, each filing of the
                  Registrant</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">'</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">s
                  annual
                  report pursuant to Section 13(a) or Section 15(d) of the Exchange
                  Act
                  (and, where applicable, each filing of an employee benefit
                  plan</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">'</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">s
                  annual
                  report pursuant to Section 15(d) of the Exchange Act) that is incorporated
                  by reference in this Registration Statement shall be deemed to
                  be a new
                  registration statement relating to the securities offered therein,
                  and the
                  offering of such securities at that time shall be deemed to be
                  the initial
                  bona fide offering thereof.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="4%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(c)</font></div>
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                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Insofar
                  as
                  indemnification for liabilities arising under the Securities Act
                  may be
                  permitted to directors, officers and controlling persons of the
                  Registrant
                  pursuant to the provisions described under Item 6 above, or otherwise,
                  the
                  Registrant has been advised that in the opinion of the Securities
                  and
                  Exchange Commission such indemnification is against public policy
                  as
                  expressed in the Securities Act and is, therefore, unenforceable.
                  In the
                  event that a claim for indemnification against such liabilities
                  (other
                  than the payment by the Registrant of expenses incurred or paid
                  by a
                  director, officer or controlling person of the Registrant in the
                  successful defense of any action, suit or proceeding) is asserted
                  by such
                  director, officer or controlling person in connection with the
                  securities
                  being registered, the Registrant will, unless in the opinion of
                  its
                  counsel the matter has been settled by controlling precedent, submit
                  to a
                  court of appropriate jurisdiction the question whether such
                  indemnification by it is against public policy as expressed in
                  the
                  Securities Act and will be governed by the final adjudication of
                  such
                  issue.</font></div>
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            </tr>
            <tr>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="4%">&#160;</td>
              <td align="left" valign="top" width="78%">&#160;</td>
            </tr>

        </table>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">3</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">
        <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
          <hr style="COLOR: silver" align="left" noshade size="2" width="100%">
        </div>
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">SIGNATURES</font></div>
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            </td>
          </tr>
          <tr>
            <td align="left" colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Pursuant
                to the requirements of the Securities Act of 1933, as amended, the
                Registrant certifies that it has reasonable grounds to believe that
                it
                meets all the requirements for filing on Form S-8 and has duly caused
                this
                Registration Statement to be signed on its behalf by the undersigned,
                thereunto duly authorized, in the City of Peoria, and the State of
                Illinois.</strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="15%">&#160;</td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>CATERPILLAR
                INC. </strong></font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Registrant)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
                29,
                2006</font></div>
            </td>
            <td align="left" valign="top" width="15%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">By:</font></div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/
                James
                B. Buda</em></font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="25%">&#160;</td>
            <td valign="top" width="15%">&#160;</td>
            <td valign="top" width="5%">&#160;</td>
            <td valign="top" width="38%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">&#160;</td>
            <td align="left" valign="top" width="15%">&#160;</td>
            <td align="left" valign="top" width="5%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="38%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">James
                B.
                Buda, </font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>Secretary</em></font></div>
            </td>
          </tr>

      </table>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><br></div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td align="left" colspan="4" valign="top" width="83%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong>Pursuant
                to the requirements of the Securities Act of 1933, as amended, this
                Registration Statement has been signed by the following persons in
                the
                capacities and on the dates indicated.</strong></font></div>
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          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">&#160;</td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
                29,
                2006</font></div>
            </td>
            <td valign="bottom" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/
                James
                W. Owens</em></font></div>
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            <td align="left" valign="bottom" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Chairman
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                Chief
                Executive Officer</font></div>
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          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(James
                W.
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
                29,
                2006</font></div>
            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/
                Stu
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
                President</font></div>
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          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Stu
                L.
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
            </td>
            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
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            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/
                Douglas R. Oberhelman</em></font></div>
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            <td align="left" valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Group
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          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Douglas
                R.
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="top" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
                29,
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                Gerard R. Vittecoq</em></font></div>
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                Steven H. Wunning</em></font></div>
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          <tr>
            <td align="left" valign="bottom" width="22%">
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                David
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            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
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          <tr>
            <td align="left" valign="bottom" width="22%">&#160;</td>
            <td valign="top" width="25%">
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            <td align="left" valign="top" width="31%">&#160;</td>
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          <tr>
            <td align="left" valign="bottom" width="22%">
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                Bradley M. Halverson</em></font></div>
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            <td align="left" valign="top" width="31%">
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              <hr style="COLOR: black" noshade size="2" width="100%">
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            <td valign="top" width="31%">&#160;</td>
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            <td align="left" valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
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            <td align="left" valign="top" width="31%">&#160;</td>
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            <td align="left" valign="bottom" width="22%">
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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                W.
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              <hr style="COLOR: black" noshade size="2" width="100%">
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            <td align="left" valign="bottom" width="22%">&#160;</td>
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            <td align="left" valign="bottom" width="31%">&#160;</td>
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          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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                John
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">
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            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(John
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
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            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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                John
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">
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          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(John
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
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            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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            <td align="left" valign="bottom" width="31%">
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          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">&#160;</td>
            <td valign="top" width="25%">
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            <td align="left" valign="bottom" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
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            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
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                Gail
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">
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          </tr>
          <tr>
            <td valign="top" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="6%">&#160;</td>
            <td valign="top" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">&#160;</td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">(Gail
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            <td align="left" valign="bottom" width="31%">&#160;</td>
          </tr>
          <tr>
            <td align="left" valign="bottom" width="22%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">June
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            </td>
            <td valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><em>/s/
                Juan
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Director</font></div>
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            <td align="left" valign="top" width="6%">&#160;</td>
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                I.
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            <td align="left" valign="top" width="6%">&#160;</td>
            <td align="left" valign="bottom" width="31%">&#160;</td>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">5</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">
        <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">
          <hr style="COLOR: silver" align="left" noshade size="2" width="100%">
        </div>
      </div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong><u>Exhibit
      Index</u></strong></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">

          <tr>
            <td valign="top" width="12%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Exhibit
                No.</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="72%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Arial">Description</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="12%">
              <hr style="COLOR: black" noshade size="2" width="100%">
            </td>
            <td valign="top" width="72%">
              <hr style="COLOR: black" noshade size="2" width="100%">
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          <tr>
            <td valign="top" width="12%">
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            <td align="justify" valign="top" width="72%">
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                Inc. 2006 Long-Term Incentive Plan (included as Exhibit A to the
                Company's
                Proxy Statement for its 2006 Annual Meeting of Stockholders filed
                with the
                Commission on April 17, 2006 and incorporated herein by
                reference)</font></div>
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
          </tr>
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            <td valign="top" width="12%">
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
            </td>
            <td align="justify" valign="top" width="72%">
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                of
                PricewaterhouseCoopers LLP</font></div>
            </td>
          </tr>

      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="left">
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.5; MARGIN-RIGHT: 0pt" align="center">
        <hr style="COLOR: silver" align="left" noshade size="2" width="100%">
      </div><br></div><br>
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[{"type": "S-8", "sequence": "1", "filename": "form_s8-ltip.htm", "description": "FORM S-8 FOR LTIP", "secsgml_size_bytes": 113095}]
{"company-data": {"conformed-name": "CATERPILLAR INC", "cik": "0000018230", "assigned-sic": "3531", "irs-number": "370602744", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-135467", "film-number": "06934534"}, "business-address": {"street1": "100 NE ADAMS ST", "city": "PEORIA", "state": "IL", "zip": "61629", "phone": "3096751000"}, "mail-address": {"street1": "100 NE ADAMS ST", "city": "PEORIA", "state": "IL", "zip": "61629"}, "former-company": {"former-conformed-name": "CATERPILLAR TRACTOR CO", "date-changed": "19860623"}}
Form S-8 for LTIP
As
      filed
      with the Securities and Exchange Commission on June 29,
      2006
Registration
      No. 333-___________________
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
WASHINGTON,
      D.C. 20549
FORM
      S-8
REGISTRATION
      STATEMENT UNDER
THE
      SECURITIES ACT
      OF 1933
CATERPILLAR
      INC.
(Exact
      Name of
      Registrant as Specified in Its Charter)
Delaware
(State
                of
                Incorporation)
37-0602744
(IRS
                Employer
                Identification No.)
100
                NE Adams Street
Peoria,
                Illinois 61629
(Address
                of
                Principal Executive Offices)
Caterpillar
      Inc. 2006 Long-Term Incentive Plan
(Full
      Title of the
      Plan)
J
ames
      B.
      Buda
Vice
      President, Secretary and General Counsel
Caterpillar
      Inc.
100
      NE
      Adams Street
Peoria,
      Illinois 61629-7310
(309)
      675-4429
(Name,
      Address and
      Telephone Number, Including Area Code, of Agent for Service)
CALCULATION
                OF REGISTRATION FEE
Title
                of securities to be registered
Amount
                to be registered
Proposed
                maximum offering price per share
Proposed
                maximum aggregate offering price
Amount
                of
registration
                fee
(2)
Common
                Stock,
                par value $1.00
20,000,000
                shares
(1)
$72.01
(3)
$1,440,200,000
$154,101.40
(1) 
                Together with an indeterminate number of additional shares that may
                be
                necessary to adjust the number of shares offered pursuant to the
                Caterpillar Inc. 2006 Long-Term Incentive Plan (the "Plan") as a
                result of
                a stock split, stock dividend or similar adjustment of the outstanding
                common stock pursuant to Rule 416(a).
(2) 
An
                aggregate of 17,600,000 shares (as adjusted to reflect all stock
                splits
                and dividends to date) are being carried forward from those shares
                previously registered by Registration Statements on Form S-8 (Nos.
                333-03609, 333-41464, 333-98197, and 333-115837). Registration fees
                of
                were already paid with respect to the shares registered in those
                filings.
                The previously registered shares being carried forward, together
                with the
                shares registered hereby, represent the total number of shares reserved
                for issuance under the Plan.
(3) 
                Estimated solely for the purposes of calculating the registration
                fee,
                computed pursuant to Rules 457(c) and (h) under the Securities Act
                of
                1933, as amended, on the basis of the average of the high and low
                sales
                prices of a share of Caterpillar Inc. Common Stock, as reported on
                the New
                York Stock Exchange - Composite Transactions System on June 22,
                2006.
PART
      I
INFORMATION
      REQUIRED IN THE SECTION 10(a) PROSPECTUS
Item
      1.
      Plan Information.*
Item
      2.
      Registrant Information and Employee Plan Annual
      Information.*
*This
      Registration
      Statement relates to the registration of 20,000,000 shares of common stock,
      par
      value $1.00 per share, of Caterpillar Inc. (the "Company") to be offered from
      time to time pursuant to the Caterpillar Inc. 2006 Long-Term Incentive Plan
      (the
      "Plan"). Pursuant to Registration Statements filed by the Company on Forms
      S-8
      (Registration No. 333-03609 filed May 13, 1996; No. 333-41464 filed July 14,
      2000; No. 333-98197 filed August 15, 2002; and No. 333-115837 filed on May
      25,
      2004), the Company previously registered 128,000,000 shares of common stock
      (as
      adjusted to reflect all stock splits and dividends to date) for use under the
      Caterpillar Inc. 1996 Stock Option Plan. Of these previously registered shares
      of common stock, 17,600,000 shares are being carried forward and remain
      available for issuance under the Plan.
As
      permitted by
      Rule 428 under the Securities Act of 1933, as amended (the "Securities Act"),
      this Registration Statement omits the information specified in Part I of Form
      S-8. The documents containing the information specified in Part I will be
      delivered to Plan participants as required by Rule 428(b). Such documents are
      not being filed with the Securities and Exchange Commission (the "Commission")
      as part of this Registration Statement or as prospectuses or prospectus
      supplements pursuant to Rule 424(b) under the Securities Act.
PART
      II
INFORMATION
      REQUIRED IN THE REGISTRATION STATEMENT
Item
      3.
      Incorporation of Documents by Reference.
The
      following
      documents have been filed by Caterpillar Inc. ("Caterpillar," the "Registrant"
      or the "Company") with the Commission pursuant to the Securities Exchange Act
      of
      1934, as amended (the "Exchange Act") and are hereby incorporated by reference
      in this Registration Statement:
(a)
Caterpillar's
                Annual Report on Form 10-K (File No. 1-768) for the fiscal year ended
                December 31, 2005, filed with the Commission on February 22, 2006 and
                amended on Form 10-K/A on May 31,
                2006;
(b)
Caterpillar's
                Quarterly Report on Form 10-Q (File No. 1-768) for the fiscal quarter
                ended March 31, 2006, filed on May 3,
                2006;
(c)
Caterpillar's
                Current Reports on Form 8-K (File No. 1-768) filed with the Commission
                on
                June 14, 2006 (two filings);
(d)
Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                June 8, 2006;
(e)
Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                May 16, 2006 (incorporates Item 8.01
                only);
(f)
Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                February 22, 2006;
(g)
Caterpillar's
                Current Report on Form 8-K (File No. 1-768) filed with the Commission
                on
                February 10, 2006 (incorporates Item 8.01 only);
                and
(h)
The
                description of Caterpillar's Common Stock contained in Form S-3,
                filed
                with the Commission on May 6, 1991 (Registration No. 33-40393), including
                any amendment or report filed with the Commission for the purpose
                of
                updating such description.
1
*In
      addition, all
      documents subsequently filed by the Company with the Commission pursuant to
      Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act and prior to the filing
      of a post-effective amendment which indicates that all securities offered hereby
      have been sold or which deregisters all securities then remaining unsold, shall
      be deemed to be incorporated by reference in this Registration Statement and
      to
      be a part hereof from the date of filing of such documents. Any statement
      contained in a document, all or a portion of which is incorporated or deemed
      to
      be incorporated by reference herein, shall be deemed to be modified or
      superseded for purposes of this Registration Statement to the extent that a
      statement contained herein (or in any other subsequently filed document which
      also is or is deemed to be incorporated by reference herein) modifies or
      supersedes such statement. Any such statement so modified or superseded shall
      not be deemed, except as so modified or superseded, to constitute a part of
      this
      Registration Statement.
Item
      4.
      Description of Securities.
Not
      applicable.
Item
      5.
      Interests of Named Experts and Counsel.
Not
      applicable
Item
      6.
      Indemnification of Directors and Officers.
Section
      145 of the
      General Corporation Law of Delaware authorizes the Company to indemnify its
      directors and officers under specified circumstances. Article V of the Company's
      Bylaws provides in effect that the Company shall provide certain indemnification
      to such persons. Article Ninth of the Company's Restated Certificate of
      Incorporation provides that a director shall not be liable to the Company or
      its
      stockholders for any breach of fiduciary duty except in certain circumstances.
      The Company has purchased directors' and officers' liability insurance in the
      amounts and subject to the conditions set forth in such policies.
Item
      7.
      Exemption From Registration Claimed.
Not
      applicable
Item
      8.
      Exhibits.
The
      following is a
      complete list of exhibits filed as a part of this Registration
      Statement:
Exhibit
                No.
Description
4.1
Caterpillar
                Inc. 2006 Long-Term Incentive Plan (included as Exhibit A to the
                Company's
                Proxy Statement for its 2006 Annual Meeting of Stockholders filed
                with the
                Commission on April 17, 2006 and incorporated herein by
                reference)
23.1
Consent
                of
                PricewaterhouseCoopers LLP
2
Item
      9.
Undertakings
(a)
The
                  undersigned Registrant hereby undertakes:
(1)
To
                  file,
                  during any period in which offers or sales are being made, a
                  post-effective amendment to this Registration Statement:
(i)
to
                  include
                  any prospectus required by Section 10(a)(3) of the Securities Act
                  of
                  1933;
(ii)
to
                  reflect in
                  the prospectus any facts or events arising after the effective
                  date of the
                  Registration Statement (or the most recent post-effective amendment
                  thereof) which, individually or in the aggregate, represent a fundamental
                  change in the information set forth in the Registration Statement;
                  or
(iii)
to
                  include
                  any material information with respect to the plan of distribution
                  not
                  previously disclosed in the registration statement or any material
                  change
                  to such information in the registration statement;
provided,
                  however
,
                  that if the
                  information required to be included in a post-effective amendment
                  by
                  paragraphs (1)(i) and (ii) above is contained in periodic reports
                  filed
                  with or furnished to the Commission by the registrant pursuant
                  to Section
                  13 or Section 15(d) of the Securities Exchange Act of 1934 that
                  are
                  incorporated by reference in this Registration Statement, paragraphs
                  (1)(i) and (ii) shall not apply.
(2)
That,
                  for the
                  purpose of determining any liability under the Securities Act of
                  1933,
                  each such post-effective amendment shall be deemed to be a new
                  registration statement relating to the securities offered therein,
                  and the
                  offering of such securities at that time shall be deemed to be
                  the initial
                  bona fide offering thereof; and
(3)
To
                  remove
                  from registration by means of a post-effective amendment any of
                  the
                  securities being registered which remain unsold at the termination
                  of the
                  offering.
(b)
The
                  undersigned Registrant hereby undertakes that, for purposes of
                  determining
                  any liability under the Securities Act, each filing of the
                  Registrant
'
s
                  annual
                  report pursuant to Section 13(a) or Section 15(d) of the Exchange
                  Act
                  (and, where applicable, each filing of an employee benefit
                  plan
'
s
                  annual
                  report pursuant to Section 15(d) of the Exchange Act) that is incorporated
                  by reference in this Registration Statement shall be deemed to
                  be a new
                  registration statement relating to the securities offered therein,
                  and the
                  offering of such securities at that time shall be deemed to be
                  the initial
                  bona fide offering thereof.
(c)
Insofar
                  as
                  indemnification for liabilities arising under the Securities Act
                  may be
                  permitted to directors, officers and controlling persons of the
                  Registrant
                  pursuant to the provisions described under Item 6 above, or otherwise,
                  the
                  Registrant has been advised that in the opinion of the Securities
                  and
                  Exchange Commission such indemnification is against public policy
                  as
                  expressed in the Securities Act and is, therefore, unenforceable.
                  In the
                  event that a claim for indemnification against such liabilities
                  (other
                  than the payment by the Registrant of expenses incurred or paid
                  by a
                  director, officer or controlling person of the Registrant in the
                  successful defense of any action, suit or proceeding) is asserted
                  by such
                  director, officer or controlling person in connection with the
                  securities
                  being registered, the Registrant will, unless in the opinion of
                  its
                  counsel the matter has been settled by controlling precedent, submit
                  to a
                  court of appropriate jurisdiction the question whether such
                  indemnification by it is against public policy as expressed in
                  the
                  Securities Act and will be governed by the final adjudication of
                  such
                  issue.
3
SIGNATURES
Pursuant
                to the requirements of the Securities Act of 1933, as amended, the
                Registrant certifies that it has reasonable grounds to believe that
                it
                meets all the requirements for filing on Form S-8 and has duly caused
                this
                Registration Statement to be signed on its behalf by the undersigned,
                thereunto duly authorized, in the City of Peoria, and the State of
                Illinois.
CATERPILLAR
                INC.
(Registrant)
June
                29,
                2006
By:
/s/
                James
                B. Buda
James
                B.
                Buda,
Secretary
Pursuant
                to the requirements of the Securities Act of 1933, as amended, this
                Registration Statement has been signed by the following persons in
                the
                capacities and on the dates indicated.
June
                29,
                2006
/s/
                James
                W. Owens
Chairman
                of
                the Board, Director
and
                Chief
                Executive Officer
(James
                W.
                Owens)
June
                29,
                2006
/s/
                Stu
                L. Levenick
Group
                President
(Stu
                L.
                Levenick)
June
                29,
                2006
/s/
                Douglas R. Oberhelman
Group
                President
(Douglas
                R.
                Oberhelman)
June
                29,
                2006
/s/
                Gerald L. Shaheen
Group
                President
(Gerald
                L.
                Shaheen)
June
                29,
                2006
/s/
                Gerard R. Vittecoq
Group
                President
(Gerard
                R.
                Vittecoq)
June
                29,
                2006
/s/
                Steven H. Wunning
Group
                President
(Steven
                H.
                Wunning)
June
                29,
                2006
/s/
                David
                B. Burritt
Vice
                President and
Chief
                Financial Officer
(David
                B.
                Burritt)
June
                29,
                2006
/s/
                Bradley M. Halverson
Controller
                and
Chief
                Accounting Officer
(Bradley
                M.
                Halverson)
4
June
                29,
                2006
/s/
                W.
                Frank Blount
Director
(W.
                Frank
                Blount)
June
                29,
                2006
/s/
                John
                R. Brazil
Director
(John
                R.
                Brazil)
June
                29,
                2006
/s/
                John
                T. Dillon
Director
(John
                T.
                Dillon)
June
                29,
                2006
Eugene
                V.
                Fife
Director
(Eugene
                V.
                Fife)
June
                29,
                2006
/s/
                Gail
                D. Fosler
Director
(Gail
                D.
                Fosler)
June
                29,
                2006
/s/
                Juan
                Gallardo
Director
(Juan
                Gallardo)
June
                29,
                2006
/s/
                David
                R. Goode
Director
(David
                R.
                Goode)
June
                29,
                2006
/s/
                Peter
                A. Magowan
Director
(Peter
                A.
                Magowan)
June
                29,
                2006
/s/
                William A. Osborn
Director
(William
                A.
                Osborn)
June
                29,
                2006
/s/
                Charles D. Powell
Director
(Charles
                D.
                Powell)
June
                29,
                2006
/s/
                Edward B. Rust, Jr.
Director
(Edward
                B.
                Rust, Jr.)
June
                29,
                2006
/s/
                Joshua I. Smith
Director
(Joshua
                I.
                Smith)
5
Exhibit
      Index
Exhibit
                No.
Description
4.1
Caterpillar
                Inc. 2006 Long-Term Incentive Plan (included as Exhibit A to the
                Company's
                Proxy Statement for its 2006 Annual Meeting of Stockholders filed
                with the
                Commission on April 17, 2006 and incorporated herein by
                reference)
23.1
Consent
                of
                PricewaterhouseCoopers LLP