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<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="right" style="font-size: 10pt; margin-top: 12pt"><B>REGISTRATION NO. 333-</B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933</B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>INPUT/OUTPUT, INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of registrant as specified in its charter)</DIV>


<DIV align="center">
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    <TD width="47%">&nbsp;</TD>
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<TR valign="bottom">
    <TD align="center" valign="top"><B>DELAWARE</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>22-2286646</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other jurisdiction<BR>
of incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer Identification No.)</TD>
</TR>
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</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>12300 PARC CREST DR.<BR>
STAFFORD, TEXAS 77477</B><BR>
(Address, including zip code, of principal executive offices)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>SECOND AMENDED AND RESTATED INPUT/OUTPUT, INC. 2004 LONG-TERM INCENTIVE PLAN</B><BR>
(Full title of the plan)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>DAVID L. ROLAND, ESQ.<BR>
VICE PRESIDENT, GENERAL COUNSEL<BR>
AND CORPORATE SECRETARY<BR>
INPUT/OUTPUT, INC.<BR>
12300 PARC CREST DR.<BR>
STAFFORD, TEXAS 77477<BR>
(281)&nbsp;933-3339</B><BR>
(Name, address and telephone number of agent for service)</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>With copies to:<BR>
MAYER, BROWN, ROWE &#038; MAW LLP<BR>
700 LOUISIANA, SUITE 3400<BR>
HOUSTON, TEXAS 77002<BR>
ATTENTION: MARC H. FOLLADORI<BR>
(713)&nbsp;238-3000</B></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>CALCULATION OF REGISTRATION FEE:</B></DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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    <TD width="10%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Proposed maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Proposed maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="left"><B>Title of securities</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="bottom" nowrap align="center"><B>Amount to be</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>offering price per</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>aggregate offering</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>Amount of</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="left"><B>to be registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
<TD nowrap align="center"><B>registered</B><SUP style="font-size: 85%; vertical-align: text-top">(1)(2)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>share</B><SUP style="font-size: 85%; vertical-align: text-top">(3)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>price</B><SUP style="font-size: 85%; vertical-align: text-top">(3)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"><B>registration fee</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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                    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common Stock $0.01 par value<SUP style="font-size: 85%; vertical-align: text-top">(1)</SUP></DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">1,700,000 shares</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$8.950</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$15,215,000</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$1,628.01</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

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</DIV>



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<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>This registration statement also (i)&nbsp;includes the associated rights to purchase Series&nbsp;A Preferred Stock, par value $0.01 per share (the
rights are not exercisable until the occurrence of certain prescribed events, none of which has occurred) and (ii)&nbsp;covers an indeterminate number
of shares that may become issuable pursuant to certain anti-dilution adjustment provisions under the Second Amended and Restated Input/Output,
Inc. 2004 Long-Term Incentive Plan pursuant to Rule 416(a) under the Securities Act of 1933 (the &#147;Securities Act&#148;).</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>The 1,700,000 shares registered hereby represent an additional 1,700,000 shares issuable pursuant to the registrant&#146;s Second Amended and
Restated Input/Output, Inc. 2004 Long-Term Incentive Plan (the &#147;2004 Plan&#148;).</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(3)</TD>
    <TD>&nbsp;</TD>
    <TD>The offering price per share and the aggregate offering price have been estimated solely for purposes of calculating the registration fee
pursuant to Rule 457(c) and Rule 457(h) under the Securities Act on the basis of the average high and low sale prices for the registrant&#146;s shares
of common stock as reported on the New York Stock Exchange composite transactions on July&nbsp;11, 2006 ($8.950per share).</TD>
</TR>

</TABLE>



<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">










<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

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<TR><TD colspan="9"><A HREF="#000">INTRODUCTORY STATEMENT</A></TD></TR>
<TR><TD colspan="9"><A HREF="#001">PART II</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#002">Item&nbsp;3. Incorporation of Documents by Reference</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#003">Item&nbsp;8. Exhibits</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#004">Item&nbsp;9. Undertakings</A></TD></TR>
<TR><TD colspan="9"><A HREF="#005">SIGNATURES</A></TD></TR>
<TR><TD colspan="9"><A HREF="#006">POWER OF ATTORNEY</A></TD></TR>
<TR><TD colspan="9"><A HREF="#007">INDEX TO EXHIBITS</A></TD></TR>
<TR><TD colspan="9"><A HREF="h37803exv5w1.htm">Opinion of Mayer, Brown, Rowe & Maw LLP</A></TD></TR>
<TR><TD colspan="9"><A HREF="h37803exv23w1.htm">Consent of Ernst & Young LLP</A></TD></TR>
<TR><TD colspan="9"><A HREF="h37803exv23w2.htm">Consent of PricewaterhouseCoopers LLP</A></TD></TR>
</TABLE>
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>






<!-- link1 "INTRODUCTORY STATEMENT" -->
<DIV align="left"><A NAME="000"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>INTRODUCTORY STATEMENT</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Registration Statement on Form&nbsp;S-8 (this &#147;Registration Statement&#148;) is being filed by
Input/Output, Inc. (the &#147;Company&#148;, or the &#147;Registrant&#148;) pursuant to General Instruction E to Form
S-8 to register an additional 1,700,000 shares of the Company&#146;s common stock, par value $0.01 per
share, issuable pursuant to the Second Amended and Restated Input/Output, Inc. 2004 Long-Term
Incentive Plan (the &#147;2004 Plan&#148;). On March&nbsp;14, 2006, the Company&#146;s Board of Directors approved,
and on May&nbsp;17, 2006, the stockholders of the Company approved, the amendment and restatement of
such plan as previously in effect, principally to (i)&nbsp;increase by 1,700,000 the total number of
shares of common stock of the Company available for issuance under such plan, and (ii)&nbsp;add
provisions allowing equity compensation awards to non-employee directors to replace the Company&#146;s
Amended and Restated 1996 Non-Employee Director Stock Option Plan, which expires by its terms in
July&nbsp;2006. The contents of the earlier registration statement on Form&nbsp;S-8, File No.&nbsp;333-125655,
previously filed by the Company and relating to the registration of shares of common stock for
issuance or resale under the 2004 Plan are hereby incorporated by reference in this Registration
Statement in accordance with General Instruction E to Form&nbsp;S-8.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The previously-filed registration statement on Form&nbsp;S-8 (No.&nbsp;333-125655) referred to above
contains a resale prospectus filed therewith pursuant to General Instruction C to Form&nbsp;S-8, which
stated that it covers the offer and sale, from time to time by the selling stockholders named
therein, of up to an aggregate of 2,600,000 shares of the Company&#146;s common stock acquired under the
2004 Plan (as then in effect). The reference to the 2,600,000 shares covered by this resale
prospectus was incorrect. Actually, only 255,500 shares were specifically identified in such
prospectus as being offered for resale by such selling stockholders.
</DIV>
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<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II</B>
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B>

</DIV>
<!-- link2 "Item&nbsp;3. Incorporation of Documents by Reference" -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. Incorporation of Documents by Reference</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following documents have been filed by the Registrant with the Securities and Exchange
Commission (the &#147;Commission&#148;) and are incorporated into this Registration Statement by reference:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Annual Report on Form&nbsp;10-K for the fiscal year ended
December&nbsp;31, 2005, filed with the Commission on March&nbsp;31, 2006
pursuant to Section 13(a) of the Securities and Exchange Act of 1934,
as amended (the &#147;Exchange Act&#148;);</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Quarterly Report on Form&nbsp;10-Q for the quarterly
period ended March&nbsp;31, 2006, filed with the Commission on May&nbsp;10, 2006
pursuant to Section 13(a) of the Exchange Act;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Current Reports on Form&nbsp;8-K filed with the
Commission on March&nbsp;20, 2006, April&nbsp;20, 2006, May&nbsp;1, 2006 and May&nbsp;18,
2006, pursuant to Section 13(a) of the Exchange Act;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the Registrant&#146;s common stock, $0.01 par value per
share, contained in the Registrant&#146;s Current Report on Form&nbsp;8-K filed
on March&nbsp;8, 2002, as such may be amended from time to time; and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="left"><B>&#149;</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Registration Statement on Form&nbsp;8-A filed with the
Commission on January&nbsp;27, 1997, as amended by Form&nbsp;8-A/A filed on May
7, 1999.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents filed by the Registrant with the Commission pursuant to Sections&nbsp;13(a), 13(c),
14 and 15(d) of the Exchange Act subsequent to the filing date of this Registration Statement and
prior to the filing of a post-effective amendment to this Registration Statement which indicates
that all securities offered have been sold or which deregisters all securities then remaining
unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be
a part hereof from the date of filing of each such document.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Nothing in this registration statement shall be deemed to incorporate information furnished by
us to, but not filed with, the Commission pursuant to Items 2.02 or 7.01 of Form&nbsp;8-K. Any
statements contained in a document incorporated or deemed to be incorporated by reference herein
shall be deemed to be modified or replaced for purposes hereof to the extent that a statement
contained herein, or in any subsequently filed document which is also incorporated or deemed to be
incorporated by reference herein, modifies or replaces such statement. Any statement so modified
or replaced shall not be deemed to constitute a part of this registration statement, except as so
modified or replaced.
</DIV>
<!-- link2 "Item&nbsp;8. Exhibits" -->
<DIV align="left"><A NAME="003"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. Exhibits</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="92%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Restated Certificate of Incorporation dated August&nbsp;31, 1990, filed on March&nbsp;19, 2001, as
Exhibit&nbsp;3.1 to the Registrant&#146;s Transition Report on Form&nbsp;10-K for the seven months ended
December&nbsp;31, 2000, and incorporated herein by reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Certificate of Amendment to Restated Certificate of Incorporation dated October&nbsp;10, 1996,
filed on March&nbsp;12, 2003, as Exhibit&nbsp;3.2 to the Registrant&#146;s Annual Report on Form&nbsp;10-K for
the year ended December&nbsp;31, 2003, and incorporated herein by reference.</TD>
</TR>
<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated Bylaws, filed on March&nbsp;8, 2002, as Exhibit&nbsp;4.3 to the Registrant&#146;s
Current Report on Form&nbsp;8-K, and incorporated herein by reference.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">2&nbsp;
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="5%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="92%">&nbsp;</TD>
</TR>
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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Second Amended and Restated Input/Output, Inc. 2004 Long-Term Incentive Plan, filed as
Appendix&nbsp;A to the definitive proxy statement for the 2006 Annual Meeting of Stockholders of
Input/Output, Inc. as filed with the SEC on April&nbsp;12, 2006, and incorporated herein by
reference.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"> Opinion of Mayer, Brown, Rowe &#038; Maw LLP.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Ernst &#038; Young LLP.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Mayer, Brown, Rowe &#038; Maw LLP (included in the opinion of Mayer, Brown, Rowe &#038; Maw
LLP filed as Exhibit&nbsp;5.1 hereto).</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"> Power of Attorney (included on the signature page hereto).</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Filed herewith</TD>
</TR>

</TABLE>


<!-- link2 "Item&nbsp;9. Undertakings" -->
<DIV align="left"><A NAME="004"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9. Undertakings</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A.&nbsp;Undertaking to Update
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The undersigned Registrant hereby undertakes:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)&nbsp;To file, during any period in which offers or sales are being made, a post-effective
amendment to this Registration Statement:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) To include any prospectus required by Section&nbsp;10(a)(3) of the Securities Act;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) To reflect in the prospectus any facts or events arising after the effective date
of this Registration Statement (or the most recent post-effective amendment hereof) which,
individually or in the aggregate, represent a fundamental change in the information set
forth in this Registration Statement. Notwithstanding the foregoing, any increase or
decrease in volume of securities offered (if the total dollar value of securities offered
would not exceed that which was registered) and any deviation from the low or high end of
the estimated maximum offering range may be reflected in the form of prospectus filed with
the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price
represent no more than a 20&nbsp;percent change in the maximum aggregate offering price set forth
in the &#147;Calculation of Registration Fee&#148; table in this Registration Statement; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) To include any material information with respect to the plan of distribution not
previously disclosed in this Registration Statement or any material change to such
information in this Registration Statement;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 3%">provided, however, that paragraphs (i)&nbsp;and (ii)&nbsp;above do not apply if the information
required to be included in a post-effective amendment by those paragraphs is contained in
periodic reports filed with or furnished to the Commission by the Registrant pursuant to
Section&nbsp;13 or 15(d) of the Exchange Act that are incorporated by reference in this
Registration Statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)&nbsp;That, for the purpose of determining any liability under the Securities Act, 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.
</DIV>

<P align="center" style="font-size: 10pt">3&nbsp;
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)&nbsp;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.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.&nbsp;Undertaking With Respect to Documents Incorporated by Reference
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The undersigned Registrant hereby undertakes that, for purposes of determining any liability
under the Securities Act, each filing of the Registrant&#146;s annual report pursuant to Section 13(a)
or 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 herein, and the
offering of such securities at that time shall be deemed to be the initial bona fide offering
thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C.&nbsp;Undertaking With Respect to Indemnification
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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 foregoing
provisions, or otherwise, the Registrant has been advised that in the opinion of the 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.
</DIV>


<P align="center" style="font-size: 10pt">4&nbsp;
</DIV>


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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">



<!-- link1 "SIGNATURES" -->
<DIV align="left"><A NAME="005"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, the Registrant certifies that it has
reasonable grounds to believe that it meets all of 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 Stafford, State of Texas, on July&nbsp;14, 2006.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left"><B>INPUT/OUTPUT, INC.</B><BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Robert P. Peebler
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD colspan="3" align="left">Robert P. Peebler&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD colspan="3" align="left">President and Chief Executive Officer&nbsp;</TD>
</TR>
</TABLE>
<!-- link1 "POWER OF ATTORNEY" -->
<DIV align="left"><A NAME="006"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL MEN BY THESE PRESENTS, that each individual whose signature appears below constitutes
and appoints R. Brian Hanson and David L. Roland, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution and resubstitution for him and in his
name, place and stead, in any and all capacities, to sign, execute and file this registration
statement under the Securities Act and any and all amendments (including, without limitation,
post-effective amendments and any amendment or amendments or additional registration statement
filed pursuant to Rule&nbsp;462 under the Securities Act increasing the amount of securities for which
registration is being sought) to this Registration Statement, and to file the same, with all
exhibits thereto, and any and all other documents in connection therewith, with the Commission, to
sign any and all applications, registration statements, notices or other documents necessary or
advisable to comply with the applicable state securities laws, and to file the same, together with
other documents in connection therewith, with the appropriate state securities authorities,
granting unto said attorney-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be
done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act, this Registration Statement has been
signed by the following persons in the capacities and on the dates indicated.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="40%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="16%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">SIGNATURE</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">TITLE</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">DATE</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Robert P. Peebler
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">President and Chief Executive Officer and Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Robert P. Peebler
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(principal executive officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ R. Brian Hanson
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Executive Vice President and Chief Financial Officer
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">R. Brian Hanson
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(principal financial officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Michael L. Morrison
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Controller and Director of Accounting
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Michael L. Morrison
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(principal accounting officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ James M. Lapeyre, Jr.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chairman of the Board of Directors and Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">James M. Lapeyre, Jr.</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Bruce S. Appelbaum
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Bruce S. Appelbaum</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Theodore H. Elliott, Jr.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Theodore H. Elliott, Jr.</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/
Franklin Myers</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Franklin Myers</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ S. James Nelson, Jr.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">S. James Nelson, Jr.</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">John N. Seitz</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Sam K. Smith
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">July&nbsp;14, 2006</TD>
</TR>
<TR style="font-size: 1px">
    <TD align="center" valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Sam K. Smith</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">5
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- link1 "INDEX TO EXHIBITS" -->
<DIV align="left"><A NAME="007"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>INDEX TO EXHIBITS</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="95%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Restated Certificate of Incorporation dated August&nbsp;31, 1990, filed on March&nbsp;19, 2001, as
Exhibit&nbsp;3.1 to the Registrant&#146;s Transition Report on Form&nbsp;10-K for the seven months ended
December&nbsp;31, 2000, and incorporated herein by reference.</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Certificate of Amendment to Restated Certificate of Incorporation dated October&nbsp;10, 1996,
filed on March&nbsp;12, 2003, as Exhibit&nbsp;3.2 to the Registrant&#146;s Annual Report on Form&nbsp;10-K for
the year ended December&nbsp;31, 2003, and incorporated herein by reference.</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated Bylaws, filed on March&nbsp;8, 2002, as Exhibit&nbsp;4.3 to the Registrant&#146;s
Current Report on Form&nbsp;8-K, and incorporated herein by reference.</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Second Amended and Restated Input/Output, Inc. 2004 Long-Term Incentive Plan, filed as
Appendix&nbsp;A to the definitive proxy statement for the 2006 Annual Meeting of Stockholders of
Input/Output, Inc. as filed with the Commission on April&nbsp;12, 2006, and incorporated herein by
reference.</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Mayer, Brown, Rowe &#038; Maw LLP</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Ernst &#038; Young LLP.</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP.</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Mayer, Brown, Rowe &#038; Maw LLP (included in the opinion of Mayer, Brown, Rowe &#038; Maw
LLP filed as Exhibit&nbsp;5.1 hereto).</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on the signature page hereto).</TD>
</TR>
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</TABLE>
</DIV>



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<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
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    <TD width="1%"></TD>
    <TD width="96"></TD>
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<TR valign="top">
    <TD nowrap align="left">*</TD>
    <TD>&nbsp;</TD>
    <TD>Filed herewith</TD>
</TR>

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sv8
Table of Contents
REGISTRATION NO. 333-
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
INPUT/OUTPUT, INC.
(Exact name of registrant as specified in its charter)
DELAWARE
22-2286646
(State or other jurisdiction
of incorporation or organization)
(I.R.S. Employer Identification No.)
12300 PARC CREST DR.
STAFFORD, TEXAS 77477
(Address, including zip code, of principal executive offices)
SECOND AMENDED AND RESTATED INPUT/OUTPUT, INC. 2004 LONG-TERM INCENTIVE PLAN
(Full title of the plan)
DAVID L. ROLAND, ESQ.
VICE PRESIDENT, GENERAL COUNSEL
AND CORPORATE SECRETARY
INPUT/OUTPUT, INC.
12300 PARC CREST DR.
STAFFORD, TEXAS 77477
(281) 933-3339
(Name, address and telephone number of agent for service)
With copies to:
MAYER, BROWN, ROWE & MAW LLP
700 LOUISIANA, SUITE 3400
HOUSTON, TEXAS 77002
ATTENTION: MARC H. FOLLADORI
(713) 238-3000
CALCULATION OF REGISTRATION FEE:
Proposed maximum
Proposed maximum
Title of securities
Amount to be
offering price per
aggregate offering
Amount of
to be registered
registered
(1)(2)
share
(3)
price
(3)
registration fee
Common Stock $0.01 par value
(1)
1,700,000 shares
$8.950
$15,215,000
$1,628.01
(1)
This registration statement also (i) includes the associated rights to purchase Series A Preferred Stock, par value $0.01 per share (the
rights are not exercisable until the occurrence of certain prescribed events, none of which has occurred) and (ii) covers an indeterminate number
of shares that may become issuable pursuant to certain anti-dilution adjustment provisions under the Second Amended and Restated Input/Output,
Inc. 2004 Long-Term Incentive Plan pursuant to Rule 416(a) under the Securities Act of 1933 (the "Securities Act").
(2)
The 1,700,000 shares registered hereby represent an additional 1,700,000 shares issuable pursuant to the registrant's Second Amended and
Restated Input/Output, Inc. 2004 Long-Term Incentive Plan (the "2004 Plan").
(3)
The offering price per share and the aggregate offering price have been estimated solely for purposes of calculating the registration fee
pursuant to Rule 457(c) and Rule 457(h) under the Securities Act on the basis of the average high and low sale prices for the registrant's shares
of common stock as reported on the New York Stock Exchange composite transactions on July 11, 2006 ($8.950per share).
TABLE OF CONTENTS
INTRODUCTORY STATEMENT
PART II
Item 3. Incorporation of Documents by Reference
Item 8. Exhibits
Item 9. Undertakings
SIGNATURES
POWER OF ATTORNEY
INDEX TO EXHIBITS
Opinion of Mayer, Brown, Rowe & Maw LLP
Consent of Ernst & Young LLP
Consent of PricewaterhouseCoopers LLP
Table of Contents
INTRODUCTORY STATEMENT
This Registration Statement on Form S-8 (this "Registration Statement") is being filed by
Input/Output, Inc. (the "Company", or the "Registrant") pursuant to General Instruction E to Form
S-8 to register an additional 1,700,000 shares of the Company's common stock, par value $0.01 per
share, issuable pursuant to the Second Amended and Restated Input/Output, Inc. 2004 Long-Term
Incentive Plan (the "2004 Plan"). On March 14, 2006, the Company's Board of Directors approved,
and on May 17, 2006, the stockholders of the Company approved, the amendment and restatement of
such plan as previously in effect, principally to (i) increase by 1,700,000 the total number of
shares of common stock of the Company available for issuance under such plan, and (ii) add
provisions allowing equity compensation awards to non-employee directors to replace the Company's
Amended and Restated 1996 Non-Employee Director Stock Option Plan, which expires by its terms in
July 2006. The contents of the earlier registration statement on Form S-8, File No. 333-125655,
previously filed by the Company and relating to the registration of shares of common stock for
issuance or resale under the 2004 Plan are hereby incorporated by reference in this Registration
Statement in accordance with General Instruction E to Form S-8.
The previously-filed registration statement on Form S-8 (No. 333-125655) referred to above
contains a resale prospectus filed therewith pursuant to General Instruction C to Form S-8, which
stated that it covers the offer and sale, from time to time by the selling stockholders named
therein, of up to an aggregate of 2,600,000 shares of the Company's common stock acquired under the
2004 Plan (as then in effect). The reference to the 2,600,000 shares covered by this resale
prospectus was incorrect. Actually, only 255,500 shares were specifically identified in such
prospectus as being offered for resale by such selling stockholders.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3. Incorporation of Documents by Reference
The following documents have been filed by the Registrant with the Securities and Exchange
Commission (the "Commission") and are incorporated into this Registration Statement by reference:
•
The Registrant's Annual Report on Form 10-K for the fiscal year ended
December 31, 2005, filed with the Commission on March 31, 2006
pursuant to Section 13(a) of the Securities and Exchange Act of 1934,
as amended (the "Exchange Act");
•
The Registrant's Quarterly Report on Form 10-Q for the quarterly
period ended March 31, 2006, filed with the Commission on May 10, 2006
pursuant to Section 13(a) of the Exchange Act;
•
The Registrant's Current Reports on Form 8-K filed with the
Commission on March 20, 2006, April 20, 2006, May 1, 2006 and May 18,
2006, pursuant to Section 13(a) of the Exchange Act;
•
The description of the Registrant's common stock, $0.01 par value per
share, contained in the Registrant's Current Report on Form 8-K filed
on March 8, 2002, as such may be amended from time to time; and
•
The Registrant's Registration Statement on Form 8-A filed with the
Commission on January 27, 1997, as amended by Form 8-A/A filed on May
7, 1999.
All documents filed by the Registrant with the Commission pursuant to Sections 13(a), 13(c),
14 and 15(d) of the Exchange Act subsequent to the filing date of this Registration Statement and
prior to the filing of a post-effective amendment to this Registration Statement which indicates
that all securities offered have been sold or which deregisters all securities then remaining
unsold, shall be deemed to be incorporated by reference into this Registration Statement and to be
a part hereof from the date of filing of each such document.
Nothing in this registration statement shall be deemed to incorporate information furnished by
us to, but not filed with, the Commission pursuant to Items 2.02 or 7.01 of Form 8-K. Any
statements contained in a document incorporated or deemed to be incorporated by reference herein
shall be deemed to be modified or replaced for purposes hereof to the extent that a statement
contained herein, or in any subsequently filed document which is also incorporated or deemed to be
incorporated by reference herein, modifies or replaces such statement. Any statement so modified
or replaced shall not be deemed to constitute a part of this registration statement, except as so
modified or replaced.
Item 8. Exhibits
4.1
Restated Certificate of Incorporation dated August 31, 1990, filed on March 19, 2001, as
Exhibit 3.1 to the Registrant's Transition Report on Form 10-K for the seven months ended
December 31, 2000, and incorporated herein by reference.
4.2
Certificate of Amendment to Restated Certificate of Incorporation dated October 10, 1996,
filed on March 12, 2003, as Exhibit 3.2 to the Registrant's Annual Report on Form 10-K for
the year ended December 31, 2003, and incorporated herein by reference.
4.3
Amended and Restated Bylaws, filed on March 8, 2002, as Exhibit 4.3 to the Registrant's
Current Report on Form 8-K, and incorporated herein by reference.
2
Table of Contents
4.4
Second Amended and Restated Input/Output, Inc. 2004 Long-Term Incentive Plan, filed as
Appendix A to the definitive proxy statement for the 2006 Annual Meeting of Stockholders of
Input/Output, Inc. as filed with the SEC on April 12, 2006, and incorporated herein by
reference.
5.1*
Opinion of Mayer, Brown, Rowe & Maw LLP.
23.1*
Consent of Ernst & Young LLP.
23.2*
Consent of PricewaterhouseCoopers LLP.
23.3
Consent of Mayer, Brown, Rowe & Maw LLP (included in the opinion of Mayer, Brown, Rowe & Maw
LLP filed as Exhibit 5.1 hereto).
24.1
Power of Attorney (included on the signature page hereto).
*
Filed herewith
Item 9. Undertakings
A. Undertaking to Update
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;
(ii) To reflect in the prospectus any facts or events arising after the effective date
of this Registration Statement (or the most recent post-effective amendment hereof) which,
individually or in the aggregate, represent a fundamental change in the information set
forth in this Registration Statement. Notwithstanding the foregoing, any increase or
decrease in volume of securities offered (if the total dollar value of securities offered
would not exceed that which was registered) and any deviation from the low or high end of
the estimated maximum offering range may be reflected in the form of prospectus filed with
the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price
represent no more than a 20 percent change in the maximum aggregate offering price set forth
in the "Calculation of Registration Fee" table in this Registration Statement; and
(iii) To include any material information with respect to the plan of distribution not
previously disclosed in this Registration Statement or any material change to such
information in this Registration Statement;
provided, however, that paragraphs (i) and (ii) above do not apply if the information
required to be included in a post-effective amendment by those paragraphs is contained in
periodic reports filed with or furnished to the Commission by the Registrant pursuant to
Section 13 or 15(d) of the Exchange Act that are incorporated by reference in this
Registration Statement.
(2) That, for the purpose of determining any liability under the Securities Act, 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.
3
Table of Contents
(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. Undertaking With Respect to Documents Incorporated by Reference
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 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 herein, and the
offering of such securities at that time shall be deemed to be the initial bona fide offering
thereof.
C. Undertaking With Respect to Indemnification
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 foregoing
provisions, or otherwise, the Registrant has been advised that in the opinion of the 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.
4
Table of Contents
SIGNATURES
Pursuant to the requirements of the Securities Act, the Registrant certifies that it has
reasonable grounds to believe that it meets all of 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 Stafford, State of Texas, on July 14, 2006.
INPUT/OUTPUT, INC.
By:
/s/ Robert P. Peebler
Robert P. Peebler
President and Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that each individual whose signature appears below constitutes
and appoints R. Brian Hanson and David L. Roland, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution and resubstitution for him and in his
name, place and stead, in any and all capacities, to sign, execute and file this registration
statement under the Securities Act and any and all amendments (including, without limitation,
post-effective amendments and any amendment or amendments or additional registration statement
filed pursuant to Rule 462 under the Securities Act increasing the amount of securities for which
registration is being sought) to this Registration Statement, and to file the same, with all
exhibits thereto, and any and all other documents in connection therewith, with the Commission, to
sign any and all applications, registration statements, notices or other documents necessary or
advisable to comply with the applicable state securities laws, and to file the same, together with
other documents in connection therewith, with the appropriate state securities authorities,
granting unto said attorney-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and
agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be
done by virtue hereof.
Pursuant to the requirements of the Securities Act, this Registration Statement has been
signed by the following persons in the capacities and on the dates indicated.
SIGNATURE
TITLE
DATE
/s/ Robert P. Peebler
President and Chief Executive Officer and Director
July 14, 2006
Robert P. Peebler
(principal executive officer)
/s/ R. Brian Hanson
Executive Vice President and Chief Financial Officer
July 14, 2006
R. Brian Hanson
(principal financial officer)
/s/ Michael L. Morrison
Controller and Director of Accounting
July 14, 2006
Michael L. Morrison
(principal accounting officer)
/s/ James M. Lapeyre, Jr.
Chairman of the Board of Directors and Director
July 14, 2006
James M. Lapeyre, Jr.
/s/ Bruce S. Appelbaum
Director
July 14, 2006
Bruce S. Appelbaum
/s/ Theodore H. Elliott, Jr.
Director
July 14, 2006
Theodore H. Elliott, Jr.
/s/
Franklin Myers
Director
July 14, 2006
Franklin Myers
/s/ S. James Nelson, Jr.
Director
July 14, 2006
S. James Nelson, Jr.
Director
John N. Seitz
/s/ Sam K. Smith
Director
July 14, 2006
Sam K. Smith
5
Table of Contents
INDEX TO EXHIBITS
4.1
Restated Certificate of Incorporation dated August 31, 1990, filed on March 19, 2001, as
Exhibit 3.1 to the Registrant's Transition Report on Form 10-K for the seven months ended
December 31, 2000, and incorporated herein by reference.
4.2
Certificate of Amendment to Restated Certificate of Incorporation dated October 10, 1996,
filed on March 12, 2003, as Exhibit 3.2 to the Registrant's Annual Report on Form 10-K for
the year ended December 31, 2003, and incorporated herein by reference.
4.3
Amended and Restated Bylaws, filed on March 8, 2002, as Exhibit 4.3 to the Registrant's
Current Report on Form 8-K, and incorporated herein by reference.
4.4
Second Amended and Restated Input/Output, Inc. 2004 Long-Term Incentive Plan, filed as
Appendix A to the definitive proxy statement for the 2006 Annual Meeting of Stockholders of
Input/Output, Inc. as filed with the Commission on April 12, 2006, and incorporated herein by
reference.
5.1*
Opinion of Mayer, Brown, Rowe & Maw LLP
23.1*
Consent of Ernst & Young LLP.
23.2*
Consent of PricewaterhouseCoopers LLP.
23.3
Consent of Mayer, Brown, Rowe & Maw LLP (included in the opinion of Mayer, Brown, Rowe & Maw
LLP filed as Exhibit 5.1 hereto).
24.1
Power of Attorney (included on the signature page hereto).
*
Filed herewith
6