<PAGE>   1
                        This Exhibit Index is on page __
    As filed with the Securities and Exchange Commission on February 16, 2001
                       Registration No. 333-_____________

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                          -----------------------------

                                    FORM S-8

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                          -----------------------------

                              MICROS SYSTEMS, INC.
               (Exact name of issuer as specified in its charter)


           MARYLAND                                      52-1101488
           --------                                      ----------
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

      7031 Columbia Gateway Drive
          Columbia, Maryland                             21046-2289
(Address of principal executive offices)                 (Zip Code)

                 THE MICROS SYSTEMS, INC. 401(k) RETIREMENT PLAN
                 -----------------------------------------------
                              (Full title of plan)


(Name, address and telephone                   (Copies to:)
number of agent for service)
                                               ANTHONY J. RICKERT, ESQUIRE
A. L. GIANNOPOULOS                             SEAN KLEIN, ESQUIRE
7031 COLUMBIA GATEWAY DRIVE                    PIPER MARBURY RUDNICK & WOLFE LLP
COLUMBIA, MARYLAND 21046-2289                  1200 19TH STREET
(443) 285-6000                                 WASHINGTON, D.C. 20036

                         CALCULATION OF REGISTRATION FEE
                         -------------------------------

<TABLE>
<CAPTION>
-----------------------------------------------------------------------------------------------------
                                        Proposed maximum     Proposed maximum      Amount of
Title of securities      Amount to be   offering price       aggregate offering    registration
to be registered         registered     per share            price                 fee
-----------------------------------------------------------------------------------------------------
<S>                      <C>            <C>                  <C>                   <C>

Common Stock (par
value $0.25 per share)   150,000        $18.19*              $2,728,500.00**       $682.13
=====================================================================================================
</TABLE>

*Calculated on the basis of the average of the high and low prices of the
Registrant's Common Stock as reported on FEBRUARY 9, 2001, on the NASDAQ
National Market, which date is within 5 business days before the date of the
filing of this Registration Statement.

**Estimated solely for the purpose of determining the registration fee in
accordance with Rule 457(h).

In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this
registration statement also covers an indeterminate amount of interests to be
offered or sold pursuant to the employee benefit plan(s) described herein.
================================================================================

<PAGE>   2
                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Not required to be included in the Form S-8 pursuant to the Note to Part I of
Form S-8.

                                     PART II

             INFORMATION NOT REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.           INCORPORATION OF DOCUMENTS BY REFERENCE.

The following documents, which have been filed by the Registrant with the
Securities and Exchange Commission (the "Commission"), are incorporated herein
by reference:

                  (a)      Annual Report on Form 10-K for the year ended June
                           30, 2000.

                  (b)      Quarterly Report on Form 10-Q for the quarter ended
                           September 30, 2000.

                  (c)      The Plan's Annual Report on Form 11-K for the year
                           ended December 31, 1999

                  (d)      Description of Common Stock of the Registrant
                           contained in the Registrant's Registration Statement
                           on Form S-3 dated January 25, 1995 and any amendments
                           or reports for purposes of updating such description.

                  (e)      All documents subsequently filed by the Registrant
                           with the Commission pursuant to Sections 13(a),
                           13(c), 14 and 15(d) of the Securities Exchange Act of
                           1934 ("Exchange Act"), prior to the filing of a
                           post-effective amendment which indicates that all
                           securities offered have been sold or which
                           deregisters all securities remaining unsold, shall be
                           deemed to be incorporated by reference into this
                           Registration Statement and to be a part of the
                           Registration Statement from the date of filing of
                           such document.


<PAGE>   3


ITEM 4.           DESCRIPTION OF SECURITIES.

                  Not applicable.

ITEM 5.           INTERESTS OF NAMED EXPERTS AND COUNSEL.

                  Not applicable.

ITEM 6.           INDEMNIFICATION OF DIRECTORS AND OFFICERS.

                  The Registrant's Articles of Incorporation, as amended,
provide that the Registrant shall indemnify its directors and officers whether
serving the Registrant or, at the Registrant's request, another entity, to the
fullest extent required or permitted by the general laws of the State of
Maryland now or hereafter in force, including the advance of expenses under the
procedures provided by such laws. The Registrant's Articles of Incorporation
also provide that the Registrant shall indemnify its other agents or employees,
whether serving the Registrant, or at its request, another entity, to such
extent as is authorized by the Board of Directors or the By-laws of the
Registrant and as permitted by law.

                  The Maryland General Corporation Law provides that a
corporation may indemnify any director made a party to a proceeding by reason of
service in that capacity unless it is established that: (1) the act or omission
of the director was material to the matter giving rise to the proceeding and (a)
was committed in bad faith or (b) was the result of active and deliberate
dishonesty, or (2) the director actually received an improper personal benefit
in money, property or services, or (3) in the case of any criminal proceeding,
the director had reasonable cause to believe that the act or omission was
unlawful. To the extent that a director has been successful in defense of any
proceeding, the Maryland General Corporation Law provides that he or she shall
be indemnified against reasonable expenses incurred in connection therewith. A
Maryland corporation may indemnify its officers to the same extent as its
directors and to such further extent as is consistent with law.

ITEM 7.           EXEMPTION FROM REGISTRATION CLAIMED.

                  Not applicable.



<PAGE>   4


ITEM 8.           EXHIBITS.

Exhibit
Number            Description
------            -----------

     5            Pursuant to Item 601(b)(5) of Regulation S-K and Rule
                  601(b)(5), because the Common Stock purchased by the MICROS
                  Systems, Inc. 401(k) Retirement Plan will be purchased by the
                  Trustee of the Plan only on the open market, an opinion of
                  counsel as to the legality of the shares being registered need
                  not be and is not included herein. Copies of the Internal
                  Revenue Service determination letters that the plan is
                  qualified under section 401 of the Internal Revenue Code are
                  attached.

    23.1          Consent of Independent Accountants

    24            Power of Attorney (contained in Signature page)

ITEM 9.           UNDERTAKINGS.

                  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 Securities Act of 1933 (the "Securities Act");

                           (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;

                           (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.

                  Paragraphs (1)(i) and (1)(ii) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Registrant pursuant to section 13 or
section 15(d) of the Exchange Act that are incorporated by reference in the
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.


<PAGE>   5

                  (3)      To remove from registration by means of a
post-effective amendment any of the securities being registered that remain
unsold at the termination of the offering.

                  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 the 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.

                  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 Act and will be governed by the final adjudication of
such issue.


<PAGE>   6




                                   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 Columbia, County of Howard, Maryland on this 16th day of February
2001.

                                      MICROS SYSTEMS, INC.


                                      By: /s/ A. L. Giannopoulos
                                          -------------------------------
                                          A. L. Giannopoulos
                                          President and Chief Executive Officer


                                POWER OF ATTORNEY

         The undersigned Officers and Directors of MICROS Systems, Inc., a
Maryland corporation (the "Corporation"), hereby constitute and appoint A. L.
Giannopoulos, the true and lawful agent and attorney-in-fact of the undersigned
with full power and authority in said agent and attorney-in-fact, to sign for
the undersigned and in their respective names as Officers and as Directors of
the Corporation, a Registration Statement on Form S-8 relating to the MICROS
Systems, Inc. 401(k) Retirement Plan (or any and all amendments, including
post-effective amendments, to such Registration Statement) and file the same,
with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, and with full power of substitution; hereby
ratifying and confirming all that said attorney-in-fact, or his substitute or
substitutes, may do or cause to be done by virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 16th day of February 2001.

SIGNATURE                                           TITLE

/s/A. L. Giannopoulos              President, Chief Executive Officer
---------------------              and Director (Principal Executive Officer)
A. L. Giannopoulos


<PAGE>   7


SIGNATURE                                           TITLE


/s/Gary C. Kaufman                 Executive Vice President, Finance and
------------------                 Administration, Chief Financial Officer
Gary C. Kaufman                    (Principal Financial and Accounting Officer)


/s/Louis M. Brown, Jr.             Chairman and Director
----------------------
Louis M. Brown, Jr.


/s/F. Suzanne Jenniches            Director
-----------------------
F. Suzanne Jenniches


/s/John G. Puente                  Director
-----------------
John G. Puente


/s/Dwight S. Taylor                Director
-------------------
Dwight S. Taylor

/s/William S. Watson               Director
--------------------
William S. Watson

/s/A. L. Giannopoulos              As Attorney-in-Fact
---------------------
A. L. Giannopoulos


/s/ Thomas L. Patz                 Plan Administrator
------------------
Authorized Representative
of the MICROS Employee Benefits
Committee



<PAGE>   8



                                     EXHIBIT INDEX

Exhibit
Number            Description
------            -----------

 5                A copy of the Internal Revenue Service determination letter
                  that the plan is qualified under section 401 of the Internal
                  Revenue Code

 23.1             Consent of Independent Accountants

 24               Power of Attorney (contained in Signature page)
[{"type": "S-8", "sequence": "1", "filename": "w45600s-8.txt", "description": "REGISTRATION STATEMENT FORM S-8", "secsgml_size_bytes": 15626}]
{"company-data": {"conformed-name": "MICROS SYSTEMS INC", "cik": "0000320345", "assigned-sic": "3578", "irs-number": "521101488", "state-of-incorporation": "MD", "fiscal-year-end": "0630"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-55816", "film-number": "1549248"}, "business-address": {"street1": "12000 BALTIMORE AVE", "city": "BELTSVILLE", "state": "MD", "zip": "20705", "phone": "3012016000"}, "mail-address": {"street1": "12000 BALTIMORE AVE", "city": "BELTSVILLE", "state": "MD", "zip": "20705-1291"}}
1
                        This Exhibit Index is on page __
    As filed with the Securities and Exchange Commission on February 16, 2001
                       Registration No. 333-_____________

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                          -----------------------------

                                    FORM S-8

                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                          -----------------------------

                              MICROS SYSTEMS, INC.
               (Exact name of issuer as specified in its charter)

           MARYLAND                                      52-1101488
           --------                                      ----------
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

      7031 Columbia Gateway Drive
          Columbia, Maryland                             21046-2289
(Address of principal executive offices)                 (Zip Code)

                 THE MICROS SYSTEMS, INC. 401(k) RETIREMENT PLAN
                 -----------------------------------------------
                              (Full title of plan)

(Name, address and telephone                   (Copies to:)
number of agent for service)
                                               ANTHONY J. RICKERT, ESQUIRE
A. L. GIANNOPOULOS                             SEAN KLEIN, ESQUIRE
7031 COLUMBIA GATEWAY DRIVE                    PIPER MARBURY RUDNICK & WOLFE LLP
COLUMBIA, MARYLAND 21046-2289                  1200 19TH STREET
(443) 285-6000                                 WASHINGTON, D.C. 20036

                         CALCULATION OF REGISTRATION FEE
                         -------------------------------
-----------------------------------------------------------------------------------------------------
                                        Proposed maximum     Proposed maximum      Amount of
Title of securities      Amount to be   offering price       aggregate offering    registration
to be registered         registered     per share            price                 fee
-----------------------------------------------------------------------------------------------------
Common Stock (par
value $0.25 per share)   150,000        $18.19*              $2,728,500.00**       $682.13
=====================================================================================================
*Calculated on the basis of the average of the high and low prices of the
Registrant's Common Stock as reported on FEBRUARY 9, 2001, on the NASDAQ
National Market, which date is within 5 business days before the date of the
filing of this Registration Statement.

**Estimated solely for the purpose of determining the registration fee in
accordance with Rule 457(h).

In addition, pursuant to Rule 416(c) under the Securities Act of 1933, this
registration statement also covers an indeterminate amount of interests to be
offered or sold pursuant to the employee benefit plan(s) described herein.
================================================================================
2
                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Not required to be included in the Form S-8 pursuant to the Note to Part I of
Form S-8.

                                     PART II

             INFORMATION NOT REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.           INCORPORATION OF DOCUMENTS BY REFERENCE.

The following documents, which have been filed by the Registrant with the
Securities and Exchange Commission (the "Commission"), are incorporated herein
by reference:

                  (a)      Annual Report on Form 10-K for the year ended June
                           30, 2000.

                  (b)      Quarterly Report on Form 10-Q for the quarter ended
                           September 30, 2000.

                  (c)      The Plan's Annual Report on Form 11-K for the year
                           ended December 31, 1999

                  (d)      Description of Common Stock of the Registrant
                           contained in the Registrant's Registration Statement
                           on Form S-3 dated January 25, 1995 and any amendments
                           or reports for purposes of updating such description.

                  (e)      All documents subsequently filed by the Registrant
                           with the Commission pursuant to Sections 13(a),
                           13(c), 14 and 15(d) of the Securities Exchange Act of
                           1934 ("Exchange Act"), prior to the filing of a
                           post-effective amendment which indicates that all
                           securities offered have been sold or which
                           deregisters all securities remaining unsold, shall be
                           deemed to be incorporated by reference into this
                           Registration Statement and to be a part of the
                           Registration Statement from the date of filing of
                           such document.
3

ITEM 4.           DESCRIPTION OF SECURITIES.

                  Not applicable.

ITEM 5.           INTERESTS OF NAMED EXPERTS AND COUNSEL.

                  Not applicable.

ITEM 6.           INDEMNIFICATION OF DIRECTORS AND OFFICERS.

                  The Registrant's Articles of Incorporation, as amended,
provide that the Registrant shall indemnify its directors and officers whether
serving the Registrant or, at the Registrant's request, another entity, to the
fullest extent required or permitted by the general laws of the State of
Maryland now or hereafter in force, including the advance of expenses under the
procedures provided by such laws. The Registrant's Articles of Incorporation
also provide that the Registrant shall indemnify its other agents or employees,
whether serving the Registrant, or at its request, another entity, to such
extent as is authorized by the Board of Directors or the By-laws of the
Registrant and as permitted by law.

                  The Maryland General Corporation Law provides that a
corporation may indemnify any director made a party to a proceeding by reason of
service in that capacity unless it is established that: (1) the act or omission
of the director was material to the matter giving rise to the proceeding and (a)
was committed in bad faith or (b) was the result of active and deliberate
dishonesty, or (2) the director actually received an improper personal benefit
in money, property or services, or (3) in the case of any criminal proceeding,
the director had reasonable cause to believe that the act or omission was
unlawful. To the extent that a director has been successful in defense of any
proceeding, the Maryland General Corporation Law provides that he or she shall
be indemnified against reasonable expenses incurred in connection therewith. A
Maryland corporation may indemnify its officers to the same extent as its
directors and to such further extent as is consistent with law.

ITEM 7.           EXEMPTION FROM REGISTRATION CLAIMED.

                  Not applicable.
4

ITEM 8.           EXHIBITS.

Exhibit
Number            Description
------            -----------

     5            Pursuant to Item 601(b)(5) of Regulation S-K and Rule
                  601(b)(5), because the Common Stock purchased by the MICROS
                  Systems, Inc. 401(k) Retirement Plan will be purchased by the
                  Trustee of the Plan only on the open market, an opinion of
                  counsel as to the legality of the shares being registered need
                  not be and is not included herein. Copies of the Internal
                  Revenue Service determination letters that the plan is
                  qualified under section 401 of the Internal Revenue Code are
                  attached.

    23.1          Consent of Independent Accountants

    24            Power of Attorney (contained in Signature page)

ITEM 9.           UNDERTAKINGS.

                  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 Securities Act of 1933 (the "Securities Act");

                           (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;

                           (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.

                  Paragraphs (1)(i) and (1)(ii) do not apply if the information
required to be included in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Registrant pursuant to section 13 or
section 15(d) of the Exchange Act that are incorporated by reference in the
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.
5

                  (3)      To remove from registration by means of a
post-effective amendment any of the securities being registered that remain
unsold at the termination of the offering.

                  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 the 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.

                  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 Act and will be governed by the final adjudication of
such issue.
6

                                   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 Columbia, County of Howard, Maryland on this 16th day of February
2001.

                                      MICROS SYSTEMS, INC.

                                      By: /s/ A. L. Giannopoulos
                                          -------------------------------
                                          A. L. Giannopoulos
                                          President and Chief Executive Officer

                                POWER OF ATTORNEY

         The undersigned Officers and Directors of MICROS Systems, Inc., a
Maryland corporation (the "Corporation"), hereby constitute and appoint A. L.
Giannopoulos, the true and lawful agent and attorney-in-fact of the undersigned
with full power and authority in said agent and attorney-in-fact, to sign for
the undersigned and in their respective names as Officers and as Directors of
the Corporation, a Registration Statement on Form S-8 relating to the MICROS
Systems, Inc. 401(k) Retirement Plan (or any and all amendments, including
post-effective amendments, to such Registration Statement) and file the same,
with all exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, and with full power of substitution; hereby
ratifying and confirming all that said attorney-in-fact, or his substitute or
substitutes, may do or cause to be done by virtue hereof.

         Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities indicated on the 16th day of February 2001.

SIGNATURE                                           TITLE

/s/A. L. Giannopoulos              President, Chief Executive Officer
---------------------              and Director (Principal Executive Officer)
A. L. Giannopoulos
7

SIGNATURE                                           TITLE

/s/Gary C. Kaufman                 Executive Vice President, Finance and
------------------                 Administration, Chief Financial Officer
Gary C. Kaufman                    (Principal Financial and Accounting Officer)

/s/Louis M. Brown, Jr.             Chairman and Director
----------------------
Louis M. Brown, Jr.

/s/F. Suzanne Jenniches            Director
-----------------------
F. Suzanne Jenniches

/s/John G. Puente                  Director
-----------------
John G. Puente

/s/Dwight S. Taylor                Director
-------------------
Dwight S. Taylor

/s/William S. Watson               Director
--------------------
William S. Watson

/s/A. L. Giannopoulos              As Attorney-in-Fact
---------------------
A. L. Giannopoulos

/s/ Thomas L. Patz                 Plan Administrator
------------------
Authorized Representative
of the MICROS Employee Benefits
Committee
8

                                     EXHIBIT INDEX

Exhibit
Number            Description
------            -----------

 5                A copy of the Internal Revenue Service determination letter
                  that the plan is qualified under section 401 of the Internal
                  Revenue Code

 23.1             Consent of Independent Accountants

 24               Power of Attorney (contained in Signature page)