As filed with the Securities and Exchange Commission on August 31, 2000

                                                    Registration No. 033-41451
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                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                        POST-EFFECTIVE AMENDMENT NO. 1
                                      TO

                                   FORM S-8

            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                            SUMMIT AUTONOMOUS INC.
            (Exact name of registrant as specified in its charter)
         Massachusetts                               04-2897945
(State or other Jurisdiction of          (I.R.S. Employer Identification No.)
Incorporation or Organization)

                               21 Hickory Drive
                               Waltham, MA 02154
         (Address of Principal Executive Offices, including Zip Code)
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           SUMMIT TECHNOLOGY, INC. 1991 EMPLOYEE STOCK PURCHASE PLAN
                             (full title of plan)
                      ---------------------------------

                              Robert J. Palmisano
                     President and Chief Executive Officer
                            Summit Autonomous Inc.
                               21 Hickory Drive
                               Waltham, MA 02154
                                 781-890-1234
           (Name, Address and Telephone Number of Agent for Service)
           ---------------------------------------------------------

                 Please send copies of all communications to:
                            Keith F. Higgins, Esq.
                                 Ropes & Gray
                            One International Place
                               Boston, MA 02110
                                 617-951-7000
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                                                                             2

     Pursuant to Rule 478(a)(4) under the Securities Act of 1933, as amended,
the Registrant hereby de-registers any and all shares of Common Stock
originally registered hereunder which have not been issued. The Summit
Technology, Inc. 1991 Employee Stock Purchase Plan, pursuant to which the
shares would have been issued, has either expired by its terms or been
terminated and no additional shares may be issued or sold under such plan.

                                   SIGNATURE

     Pursuant to the requirements of the Securities Act of 1933, as amended,
the Registrant has duly caused this Post-Effective Amendment No. 1 to its
Registration Statement on Form S-8 to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Waltham, The
Commonwealth of Massachusetts, on this 31st day of August, 2000.



SUMMIT AUTONOMOUS INC.


/s/ Robert J. Palmisano
- -------------------------------
By:  Robert J. Palmisano
     President, Chief Executive Officer and Director

     Pursuant to the Requirements of the Securities Act of 1933, as amended,
this Post-Effective Amendment No. 1 to the Registration Statement on Form S-8
has been signed below by the following persons in the capacities indicated.

Signature                       Capacity                           Date


/s/ Robert J. Palmisano         President, Chief Executive     August 31, 2000
- ------------------------------  Officer (Principal Executive
Robert J. Palmisano             Officer) and Director


/s/ Daniel L. Schneiderman      Acting Chief Financial         August 31, 2000
- ------------------------------  Officer (Principal Financial
Daniel L. Schneiderman          and Accounting Officer


                                Director                       August ___, 2000
- ------------------------------
Randy W. Frey







                                Director                       August ___, 2000
- ------------------------------
Richard M. Traskos


                                Director                       August ___, 2000
- ------------------------------
Timothy R.G. Sear


/s/ Gerald D. Cagle             Director                       August 31, 2000
- ------------------------------
Gerald D. Cagle


/s/ Charles E. Miller           Director                       August 31, 2000
- ------------------------------
Charles E. Miller


/s/ C. Allen Baker              Director                       August 31, 2000
- ------------------------------
C. Allen Baker