8-K

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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K


                                 CURRENT REPORT



                         PURSUANT TO SECTION 13 OR 15(d)
                      OF THE SECURITIES EXCHANGE ACT OF 1934


      Date of Report (Date of earliest event reported) September 25, 2000


                               Input/Output, Inc.
             (Exact name of Registrant as specified in its charter)


                                    Delaware
                 (State or other jurisdiction of incorporation)


             1-13402                                      22-2286646
      (Commission File Number)                 (IRS Employer Identification No.)


12300 C. E. Selecman Drive, Stafford, Texas                  77477
 (Address of principal executive offices)                  (Zip Code)


       Registrant's telephone number, including area code (281) 933-3339



                                 Not Applicable
          (Former name or former address, if changed since last report)

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Item 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.


        (C) EXHIBITS

            99.1   Press release issued by the Registrant on October 10, 2000.

Item 8. CHANGE IN FISCAL YEAR.

         On September 25, 2000, the Registrant's Board of Directors adopted a
resolution providing for the change of its fiscal year end from May 31 to
December 31. The Registrant intends to file a Transition Report on Form 10-K
covering the transition period from June 1, 2000 to December 31, 2000 on or
before March 31, 2001.

         A copy of the related press release announcing this change is filed as
Exhibit 99.1 to this Current Report on Form 8-K.

                                    SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                       Input/Output, Inc.



Date: October 10, 2000         By: /s/ Timothy J. Probert
                                   --------------------------------------
                                    Timothy J. Probert
                                    President and Chief Executive Officer


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                                  EXHIBIT INDEX

            99.1     Press release issued by the Registrant on October 10, 2000.

EX-99.1

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                                                                   EXHIBIT 99.1


                            [INPUT/OUTPUT LOGO HERE]


NEWS RELEASE

For further information contact:
C. Robert Bunch
Chief Administrative Officer
(281) 933-3339
================================================================================
TUESDAY, OCTOBER 10, 2000



                            CHANGE IN FISCAL YEAR END

         HOUSTON - Input/Output, Inc. (NYSE: IO) today announced that effective
December 31, 2000 the Company's fiscal year-end will change from May 31 to
December 31. Accordingly, the Company intends to file a transition report on
Form 10-K as of and for the seven months ending December 31, 2000. A Quarterly
Report on Form 10-Q will be filed for the three months ending November 30, 2000
based on the Company's current fiscal period.

         In commenting on the change, Tim Probert, the Company's President and
Chief Executive Officer said, "Adopting a calendar year-end for our fiscal year
will better align the Company's financial reporting periods both with the
industry sector and the Company's business strategy."

         Input/Output is a world leader in seismic acquisition imaging
technology for land, transition zone and marine exploration and production. The
Company specializes in driving to market technology that creates value for the
energy industry in the areas of 2D, 3D, 4D, and multi-component seismic data
acquisition.

     This press release contains forward-looking information, which is subject
to the provisions of the Private Securities Litigation Reform Act of 1995,
including statements relating to, the potential effects of the Company's
financial reporting periods. Investors are cautioned that all forward-looking
statements are subject to certain risks and uncertainties that could cause
actual results to differ materially from those projected, including risks
associated with the timing and development of, and market acceptance of, the
Company's products and services, technological changes affecting the Company's
product line, industry conditions, risks associated with competition and
competitive pricing pressures, defaults in financed purchase obligations and
changes in contract terms, and risks associated with sales to customers outside
the United States. Additional factors which could affect actual results are
described in the section entitled "Cautionary Statement for Purposes of
Forward-Looking Statements" contained in the Company's report on Form 10-K for
the year ended May 31, 2000 and the Company's Quarterly Reports on Form 10-Q
filed thereafter.