HMT TECHNOLOGY CORP
SC 13G, 1997-02-14
MAGNETIC & OPTICAL RECORDING MEDIA
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                (AMENDMENT NO. )*

                           HMT Technology Corporation
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                          Common Stock, $.001 par value
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   0004039171
                       ----------------------------------
                                 (CUSIP Number)


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


                               Page 1 of 41 Pages


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

CUSIP NO.  0004039171              13G                Page   2   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Ventures III, L.P.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                     (a)[ ]
                                                                     (b)[ ]
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                          5 SOLE VOTING POWER                                   
                                                                    
                              0 shares                                          
  NUMBER OF               ----------------------------------------------------- 
   SHARES                 6 SHARED VOTING POWER                             
BENEFICIALLY                                                                    
  OWNED BY                    14,720,691 shares                                 
    EACH                  ------------------------------------------------------
  REPORTING               7 SOLE DISPOSITIVE POWER                          
   PERSON                                                                       
    WITH                      0 shares                                          
                          ------------------------------------------------------
                          8 SHARED DISPOSITIVE POWER                            
                                                                                
                              14,720,691 shares                                 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]



- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 PN

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!
                               
                               Page 2 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   3   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Partners III, L.P.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]
                                                                      (b) [ ]

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  3     SEC USE ONLY



- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ------------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ------------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ------------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 PN
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 3 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   4   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Subordinated Debt Fund, L.P.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]
                                                                      (b) [ ]

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ------------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ------------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ------------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 PN
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 4 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   5   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Ventures IV, L.P.

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                     (a) [ ]

                                                                     (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

                 PN
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 5 of 41 Pages





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

CUSIP NO.  0004039171              13G                Page   6   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Partners IV, L.P.

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                       (a) [ ]

                                                                       (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
 
                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

                 PN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 6 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   7   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Partners SD, L.P.

- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                    (a) [ ]
                                                                    (b) [ ]

- --------------------------------------------------------------------------------
  3     SEC USE ONLY



- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER
       NUMBER OF
                                         0 shares
                           -----------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ------------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ------------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%
- --------------------------------------------------------------------------------
   12   TYPE OF REPORTING PERSON *

                 PN
- --------------------------------------------------------------------------------
                       *INSTRUCTIONS BEFORE FILLING OUT!

                               Page 7 of 41 Pages



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

CUSIP NO.  0004039171              13G                Page   8   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Summit Investors II, L.P.

- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]

                                                                      (b) [ ]
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Delaware limited partnership

- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER       
        NUMBER OF
                                         0 shares
                          ------------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ------------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ------------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- --------------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- --------------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- --------------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 PN
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                                  Page 8 of 41




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

CUSIP NO.  0004039171              13G                Page   9   of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Stamps, Woodsum & Co. III

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                       (a)
                                                                       (b)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  3     SEC USE ONLY


- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Massachusetts general partnership

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                           5    SOLE VOTING POWER
       NUMBER OF
                                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 PN
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 9 of 41 Pages





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

CUSIP NO.  0004039171              13G                Page   10   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Stamps, Woodsum & Co. IV
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                     (a)  [ ]
                                                                     (b)  [ ]

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 Massachusetts general partnership

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER
       NUMBER OF
                                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 PN
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 10 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   11   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 E. Roe Stamps, IV
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                       (a) [ ]
                                                                       (b) [ ]

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
   10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
   11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
   12   TYPE OF REPORTING PERSON *

                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                      SEE INSTRUCTIONS BEFORE FILLING OUT!

                                  Page 11 of 41




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

CUSIP NO.  0004039171              13G                Page   12   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Stephen G. Woodsum
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]
                                                                      (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------------------------- ----- ------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 IN
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                      SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 12 of 41 Pages





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

CUSIP NO.  0004039171              13G                Page   13   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Gregory M. Avis

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                     (a) [ ]
                                                                     (b) [ ]

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                                  Page 13 of 41





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

CUSIP NO.  0004039171              13G                Page   14   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 John A. Genest

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                     (a) [ ]
                                                                     (b) [ ]

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER
       NUMBER OF
                                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                               Page 14 of 41 Pages




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

CUSIP NO.  0004039171              13G                Page   15  of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Martin J. Mannion

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]
                                                                      (b) [ ]

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------------------------- ----- ------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 IN
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 15 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   16   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Ernest K. Jacquet

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]
                                                                      (b) [ ]

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
   12   TYPE OF REPORTING PERSON *

                 IN
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     * SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 16 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   17   of  41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Bruce R. Evans

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                   (a) [ ]

                                                                   (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *
 
                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 17 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   18  of   41   Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Thomas S. Roberts

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                    (a) [ ]

                                                                    (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------------------------- ----- ------------------------------------------------
                           5    SOLE VOTING POWER
       NUMBER OF
                                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
   11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
   12   TYPE OF REPORTING PERSON *

                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 18 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   19   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Walter G. Kortschak

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]

                                                                      (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         14,720,691 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         14,720,691 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 14,720,691 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 36.4%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
 12     TYPE OF REPORTING PERSON *

                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 19 of 41 Pages






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

CUSIP NO.  0004039171              13G                Page   20   of   41  Pages
          ------------                                    -------  --------
- --------------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  1     NAME OF REPORTING PERSON
        S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                 Joseph F. Trustey

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a) [ ]

                                                                      (b) [ ]
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  3     SEC USE ONLY


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  4     CITIZENSHIP OR PLACE OF ORGANIZATION

                 United States

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                           5    SOLE VOTING POWER

       NUMBER OF                         0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
         SHARES            6    SHARED VOTING POWER
      BENEFICIALLY
        OWNED BY                         7,688,310 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          EACH             7    SOLE DISPOSITIVE POWER
       REPORTING
         PERSON                          0 shares
                          ----- ------------------------------------------------
                          ----- ------------------------------------------------
          WITH             8    SHARED DISPOSITIVE POWER

                                         7,688,310 shares
- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                 7,688,310 shares

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*[ ]


- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                 19.0%

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
  12    TYPE OF REPORTING PERSON *

                 IN

- ------- ------------------------------------------------------------------------
- ------- ------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                              Page 20 of 41 Pages






                                                   Schedule 13G


Item 1(a).      Name of Issuer: HMT Technology Corporation

Item 1(b).     Address  of  Issuer's  Principal  Executive  Offices:  1055  Page
               Avenue, Fremont, CA 94538
                  
Item 2(a).     Names of  Persons  Filing:  Summit  Ventures  III,  L.P.,  Summit
               Partners III, L.P., Summit Ventures IV, L.P., Summit Partners IV,
               L.P.,  Summit  Partners SD, L.P, Summit  Subordinated  Debt Fund,
               L.P.,  Summit  Investors  II,  L.P.,  Stamps,  Woodsum & Co. III,
               Stamps,  Woodsum & Co. IV, and Messrs. E. Roe Stamps, IV, Stephen
               G. Woodsum,  Gregory M. Avis, John A. Genest,  Martin J. Mannion,
               Ernest K. Jacquet,  Bruce R. Evans, Thomas S. Roberts,  Walter G.
               Kortschak and Joseph F. Trustey.

               Summit  Partners III, L.P. is the sole general  partner of Summit
               Ventures III, L.P.  Summit  Partners IV, L.P. is the sole general
               partner of Summit  Ventures IV, L.P.  Summit Partners SD, L.P. is
               the sole general partner of Summit  Subordinated  Debt Fund, L.P.
               Stamps,  Woodsum & Co. III is the sole general  partner of Summit
               Partners III, L.P.  Stamps,  Woodsum & Co. IV is the sole general
               partner of Summit Partners IV, L.P. Stamps,  Woodsum & Co. III is
               the sole  general  partner of Summit  Partners  SD, L.P.  Messrs.
               Stamps, Woodsum, Avis, Genest,  Mannion,  Jacquet, Evans, Roberts
               and Kortschak are individual general partners of Stamps,  Woodsum
               & Co. III, Stamps, Woodsum & Co. IV and Summit Investors II, L.P.
               Messr.  Trustey  is an  individual  general  partner  of  Stamps,
               Woodsum & Co. III, and Stamps, Woodsum & Co. IV.

Item 2(b).     Address of Principal Business Office or, if None, Residence:  The
               address of the principal  business office of Summit Ventures III,
               L.P.,  Summit Ventures IV, L.P.,  Summit  Subordinated Debt Fund,
               L.P.,  Summit  Investors II, L.P.,  Summit  Partners  III,  L.P.,
               Summit  Partners IV,  L.P.,  Summit  Partners  SD, L.P.,  Stamps,
               Woodsum & Co. III, Stamps,  Woodsum & Co. IV, and Messrs. Stamps,
               Woodsum,  Mannion, Genest, Jacquet, Evans, Roberts and Trustey is
               Summit  Partners,  600  Atlantic  Avenue,  Boston,  Massachusetts
               02210.  The address of the principal  business  office of Messrs.
               Avis and Kortschak is Summit Partners,  499 Hamilton Avenue, Palo
               Alto, California 94301.

Item 2(c).     Citizenship:  Each of Summit Ventures III, L.P.,  Summit Partners
               III, L.P.,  Summit  Ventures IV, L.P.,  Summit Partners IV, L.P.,
               Summit Investors II, L.P.,  Summit  Subordinated  Debt Fund, L.P.
               and Summit Partners SD, L.P. is a limited  partnership  organized
               under the laws of the State of Delaware.  Each of Stamps, Woodsum
               & Co. III and Stamps,  Woodsum & Co. IV is a general  partnership
               organized under the laws of the  Commonwealth  of  Massachusetts.
               Each of Messrs. Stamps, Woodsum, Avis, Mannion,  Genest, Jacquet,
               Evans, Roberts, Kortschak and Trustey is a United States citizen.


                              Page 21 of 41 Pages



Item 2(d).     Title of Class of Securities:  Common Stock,  $.001 par value per
               share.

Item 2(e).     CUSIP Number:0004039171

Item 3.        If this  statement  is  filed  pursuant  to  Rules  13d-1(b),  or
               13d-2(b), check whether the person filing is a:
                  
               (a)  [  ]  Broker or Dealer  registered  under  Section 15 of the
                          Securities Exchange Act of 1934 (the "Act").

               (b)  [  ]  Bank as defined in Section 3(a)(6) of the Act.

               (c)  [  ]  Insurance  Company as defined in Section  3(a)(19)  of
                          the Act.

               (d)  [  ]  Investment  Company  registered under Section 8 of the
                          Investment Company Act of 1940.

               (e)  [  ]  Investment Adviser registered under Section 203 of the
                          Investment Advisers Act of 1940.

               (f)  [  ]  Employee  Benefit Plan,  Pension Fund which is subject
                          to the  provisions of the Employee  Retirement  Income
                          Security  Act of  1974 or  Endowment  Fund;  see  Rule
                          13d-1(b)(1)(ii)(F) of the Act.

               (g)  [  ]  Parent  Holding  Company,   in  accordance  with  Rule
                          13d-1(b)(ii)(G) of the Act.

               (h)  [  ]  Group, in accordance with Rule  13d-1(b)(1)(ii)(H)  of
                          the Act.

               Not Applicable

Item 4.        Ownership.

               (a)   Amount Beneficially Owned:

                     Each of Summit Ventures IV, L.P., Summit Partners IV, L.P.,
                     Summit  Ventures III,  L.P.,  Summit  Partners  III,  L.P.,
                     Summit  Investors  II,  L.P.,  Stamps,  Woodsum  & Co.  IV,
                     Stamps,  Woodsum & Co. III, Summit  Subordinated Debt Fund,
                     L.P. and Summit Partners SD, L.P. (individually an "Entity"
                     and  collectively  the  "Entities")  may be  deemed  to own
                     beneficially  14,720,691  shares  of  Common  Stock  as  of
                     December 31, 1996. Each of Messrs.  Stamps,  Woodsum, Avis,
                     Mannion,  Genest, Jacquet, Evans, Roberts and Kortschak may
                     be deemed to own beneficially  14,720,691  shares of Common
                     Stock as of December 31, 1996. Messr. Trustey may be deemed
                     to own 7,688,310  shares of Common Stock as of December 31,
                     1996.



                              Page 22 of 41 Pages



                     As of December 31, 1996,  Summit Ventures III, L.P. was the
                     record owner of  6,778,429  shares of Common  Stock.  As of
                     December 31, 1996, Summit Investors II, L.P. was the record
                     owner of 253,952 shares of Common Stock. As of December 31,
                     1996,  Summit  Ventures  IV, L.P.  was the record  owner of
                     6,778,429  shares of Common Stock. As of December 31, 1996,
                     Summit Subordinated Debt Fund, L.P. was the record owner of
                     909,881  shares of Common Stock.  The shares held of record
                     by Summit  Ventures III, L.P.,  Summit  Investors II, L.P.,
                     Summit Ventures IV, L.P. and Summit Subordinated Debt Fund,
                     L.P.  are  referred to herein  collectively  as the "Record
                     Shares". By virtue of the affiliate relationships among the
                     Entities, each Entity may be deemed to own beneficially all
                     of the Record Shares.  Hence,  each Entity may be deemed to
                     own  beneficially  14,720,691  shares of Common  Stock.  In
                     their capacities as individual  general partners of Stamps,
                     Woodsum & Co.  III,  Stamps,  Woodsum & Co.  IV, and Summit
                     Investors II, L.P., each of Messrs. Stamps,  Woodsum, Avis,
                     Mannion,  Genest, Jacquet, Evans, Roberts and Kortschak may
                     be deemed to own beneficially  14,720,691  shares of Common
                     Stock.  In his capacity as  individual  general  partner of
                     Stamps,  Woodsum & Co.  III and  Stamps,  Woodsum & Co. IV,
                     Messr. Trustey may be deemed to own beneficially  7,688,310
                     shares of Common Stock.

                b)   Percent of Class:

                     Summit Ventures II, L.P.:  36.4%
                     Summit Partners II, L.P.:  36.4%
                     Summit Ventures III, L.P.:  36.4%
                     Summit Partners III, L.P.:  36.4%
                     Summit Subordinated Debt Fund, L.P.:  36.4%
                     Summit Partners SD, L.P.:  36.4%
                     Summit Investors II, L.P.:  36.4%
                     Stamps, Woodsum & Co. III:  36.4%
                     Stamps, Woodsum & Co. IV:  36.4%
                     E. Roe Stamps, IV:  36.4%
                     Stephen G. Woodsum:  36.4%
                     Gregory M. Avis:  36.4%
                     Martin J. Mannion:  36.4%
                     John A. Genest:  36.4%
                     Ernest K. Jacquet:  36.4%
                     Bruce R. Evans:  36.4%
                     Walter G. Kortschak:  36.4%
                     Thomas S. Roberts: 36.4%
                     Joseph F. Trustey:  19.0%

                     The  foregoing  percentages  are  calculated  based  on the
                     40,489,109   shares  of  Common   Stock   reported   to  be
                     outstanding  in a  Quarterly  Report  on 


                                 Page 23 of 41



             
                     Form 10-Q for HMT  Technology  Corporation  for the quarter
                     ended September 30, 1996.

               (c)   Number of shares as to which such person has:

                     (i)   sole power to vote or to direct the vote:

                           0 shares for each reporting person

                     (ii)  shared power to vote or to direct the vote:

                           Summit Ventures III, L.P.:  14,720,691 shares
                           Summit Partners III, L.P.:  14,720,691 shares
                           Summit Ventures IV, L.P.:  14,720,691 shares
                           Summit Partners IV, L.P.: 14,720,691 shares
                           Summit Subordinated Debt Fund, L.P. 14,720,691 shares
                           Summit Partners SD, L.P.: 14,720,691 shares
                           Summit Investors II, L.P.:  14,720,691 shares
                           Stamps, Woodsum & Co. III:  14,720,691 shares
                           Stamps, Woodsum & Co. IV:  14,720,691 shares
                           E. Roe Stamps, IV:  14,720,691 shares
                           Stephen G. Woodsum:  14,720,691 shares
                           Gregory M. Avis:  14,720,691 shares
                           Martin J. Mannion:  14,720,691 shares
                           John A. Genest:  14,720,691 shares
                           Ernest K. Jacquet:  14,720,691 shares
                           Bruce R. Evans:  14,720,691 shares
                           Walter G. Kortschak:  14,720,691 shares
                           Thomas S. Roberts: 14,720,691 shares
                           Joseph F. Trustey: 7,688,310 shares

                   (iii)   sole power to dispose or direct the disposition of:

                           0 shares for each reporting person

                   (iv)    shared power to dispose or direct the disposition of:

                           Summit Ventures III, L.P.:  14,720,691 shares
                           Summit Partners III, L.P.:  14,720,691 shares
                           Summit Ventures IV, L.P.:  14,720,691 shares
                           Summit Partners IV, L.P.: 14,720,691 shares
                           Summit Subordinated Debt Fund, L.P.:14,720,691 shares
                           Summit Partners SD, L.P.: 14,720,691 shares
                           Summit Investors II, L.P.:  14,720,691 shares
                           Stamps, Woodsum & Co. III:  14,720,691 shares
                           Stamps, Woodsum & Co. IV:  14,720,691 shares
                           
                              Page 24 of 41 Pages




                           E. Roe Stamps, IV:  14,720,691 shares
                           Stephen G. Woodsum:  14,720,691 shares
                           Gregory M. Avis:  14,720,691 shares
                           Martin J. Mannion:  14,720,691 shares
                           John A. Genest:  14,720,691 shares
                           Ernest K. Jacquet:  14,720,691 shares
                           Bruce R. Evans:  14,720,691 shares
                           Walter G. Kortschak:  14,720,691 shares
                           Thomas S. Roberts: 14,720,691 shares
                           Joseph F. Trustey:  7,688,310 shares

               Each of the  reporting  persons  expressly  disclaims  beneficial
               ownership  of any  shares  of  Common  Stock  of  HMT  Technology
               Corporation,  except in the case of Summit Ventures IV, L.P., for
               the  6,778,429  shares  which it holds of record,  in the case of
               Summit Subordinated Debt Fund, L.P., for the 909,881 shares which
               it holds of record, in the case of Summit Investors II, L.P., for
               the 253,952  shares which it holds of record,  and in the case of
               Summit  Ventures III,  L.P.,  for the  6,778,429  shares which it
               holds of record.

Item 5.        Ownership of Five Percent or Less of a Class.

               Not Applicable.

Item 6.        Ownership of More than Five Percent on Behalf of Another Person.

               Not Applicable.

Item 7.        Identification   and   Classification  of  the  Subsidiary  which
               Acquired the  Security  Being  Reported on By the Parent  Holding
               Company.

               Not Applicable.

Item 8.        Identification and Classification of Members of the Group.

               Not  Applicable.   The  reporting  persons   expressly   disclaim
               membership in a "group" as defined in Rule 13d-1(b)(ii)(H).

Item 9.        Notice of Dissolution of Group.

               Not Applicable.

Item 10.       Certification.

               Not  Applicable.  This  statement  on  Schedule  13G is not filed
               pursuant to Rule 13d-1(b).


                              Page 25 of 41 Pages






                                   SIGNATURES

      After reasonable  inquiry and to the best of our knowledge and belief,  we
certify that the information  set forth in this statement is true,  complete and
correct.  We also hereby agree to file this  statement  jointly  pursuant to the
Agreement listed on Exhibit 1 hereto.

Dated:  February 14, 1997

SUMMIT VENTURES IV, L.P.                         SUMMIT INVESTORS II, L.P.

By:   Summit Partners IV, L.P.                   By: /s/ John A. Genest
                                                    ----------------------------
                                                       General Partner
By:   Stamps, Woodsum & Co. IV
                                                 SUMMIT PARTNERS IV, L.P.
      By:        *
         -----------------------
              E. Roe Stamps, IV                  By:   Stamps, Woodsum & Co. IV
              General Partner
                                                       By:            *
                                                          ----------------------
SUMMIT VENTURES III, L.P.                                      E. Roe Stamps, IV
                                                               General Partner
By:   Summit Partners III, L.P.
                                                 SUMMIT PARTNERS III, L.P.
By:   Stamps, Woodsum & Co. III
                                                 By:   Stamps, Woodsum & Co. III
      By:            *
         -----------------------                  
              E. Roe Stamps, IV                        By:            *
              General Partner                             ----------------------
                                                               E. Roe Stamps, IV
                                                               General Partner
SUMMIT SUBORDINATED DEBT FUND, L.P.
                                                 SUMMIT PARTNERS SD, L.P.
By:   Summit Partners SD, L.P.
                                                 By:   Stamps, Woodsum & Co. III
By:   Stamps, Woodsum & Co. III
                                                       By:            *
      By:           *                                     ----------------------
         -----------------------                               E. Roe Stamps, IV
              E. Roe Stamps, IV                                General Partner
              General Partner



                              Page 26 of 41 Pages





STAMPS, WOODSUM & CO. IV                         STAMPS, WOODSUM & CO. III

By:                  *                           By:           *
      ------------------------                      ----------------------------
      E. Roe Stamps, IV                                E. Roe Stamps, IV
      General Partner                                  General Partner

                     *                                         *
- ------------------------------                   -------------------------------
E. Roe Stamps, IV                                Martin J. Mannion

                     *                            /s/ John A. Genest
- ------------------------------                   -------------------------------
Stephen G. Woodsum                               John A. Genest

                     *                                         *
- ------------------------------                   -------------------------------
Gregory M. Avis                                  Ernest K. Jacquet

                     *                                         *
- ------------------------------                   -------------------------------
Joseph F. Trustey                                Bruce R. Evans

                                                               *
                                                 -------------------------------
                                                 Walter G. Kortschak


                                                               *
                                                 ------------------------------
                                                 Thomas S. Roberts


                                                 *By: /s/ John A. Genest
                                                     ---------------------------
                                                       John A. Genest,
                                                       Attorney-in-fact



- --------------------------------------------------------------------------------
* Pursuant to Powers of Attorney on file with the  Commission,  which  Powers of
Attorney are incorporated herein by reference. Copies of such Powers of Attorney
are attached hereto as Exhibit 2.

                              Page 27 of 41 Pages




                                                                       Exhibit 1

                                    AGREEMENT

      Pursuant to Rule  13d-1(f)(1)  under the Securities  Exchange Act of 1934,
the undersigned hereby agree that only one statement  containing the information
required by Schedule 13G need be filed with respect to the  ownership by each of
the undersigned of shares of Common Stock of HMT Technology Corporation.

      This  agreement  may be  executed in any number of  counterparts,  each of
which shall be deemed an original.

      EXECUTED this 14th day of February, 1997.

SUMMIT VENTURES IV, L.P.                       SUMMIT INVESTORS II, L.P.

By:   Summit Partners IV, L.P.                 By: /s/ John A. Genest
                                                  ---------------------------
                                                     General Partner
By:   Stamps, Woodsum & Co. IV
                                               SUMMIT PARTNERS IV, L.P.
      By:           *
         ------------------------
              E. Roe Stamps, IV                By:   Stamps, Woodsum & Co. IV
              General Partner
                                                     By:          *
                                                         -----------------------
SUMMIT VENTURES III, L.P.                                    E. Roe Stamps, IV
                                                             General Partner
By:   Summit Partners III, L.P.
                                               SUMMIT PARTNERS III, L.P.
By:   Stamps, Woodsum & Co. III
                                               By :  Stamps, Woodsum & Co. III
      By:                  *
          -----------------------  
              E. Roe Stamps, IV                      By:                  *
              General Partner                            -----------------------
                                                             E. Roe Stamps, IV
                                                             General Partner
SUMMIT SUBORDINATED DEBT FUND, L.P.
                                               SUMMIT PARTNERS SD, L.P.
By:   Summit Partners SD, L.P.
                                               By:   Stamps, Woodsum & Co. III
By:   Stamps, Woodsum & Co. III
                                                     By:            *
      By:                   *                            -----------------------
         ------------------------                            E. Roe Stamps, IV
              E. Roe Stamps, IV                              General Partner
              General Partner

                              Page 28 of 41 Pages






STAMPS, WOODSUM & CO. III                                          *
                                               -------------------------------  
                                               E. Roe Stamps, IV

By:                 *                                              *
   ---------------------------                 -------------------------------  
         E. Roe Stamps, IV                     Stephen G. Woodsum
         General Partner
                                                                   *
                                               -------------------------------  
                                               Gregory M. Avis
STAMPS, WOODSUM & CO. IV
                                                                   *
                                               -------------------------------  
By:                 *                          Martin J. Mannion
   ---------------------------
    E. Roe Stamps, IV
      General Partner                          /s/ John A. Genest
                                               -------------------------------  
                                               John A. Genest

                                                                   *
                                               -------------------------------  
                                               Ernest K. Jacquet

                                                                   *
                                               -------------------------------  
                                               Bruce R. Evans

                                                                   *
                                               -------------------------------  
                                               Walter G. Kortschak

                                                                   *
                                               -------------------------------  
                                               Thomas S. Roberts

                                                                   *
                                               -------------------------------  
                                               Joseph F. Trustey



                               Page 29 of 41 Pages



                                               *By: /s/ John A. Genest
                                                   --------------------------
                                                     John A. Genest,
                                                     Attorney-in-fact


- --------------------------------------------------------------------------------
*     Pursuant to Powers of Attorney on file with the  Commission,  which Powers
      of Attorney are incorporated herein by reference. Copies of such Powers of
      Attorney are attached hereto as Exhibit 2.


                               Page 30 of 41 Pages



                                                                       Exhibit 2
                                                                       ---------

                                 POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS,  that each person whose  signature  appears
below hereby constitutes and appoints each and any of E. Roe Stamps, IV, Stephen
G.  Woodsum and John A. Genest his true and lawful  attorney-in-fact  and agent,
with full power of  substitution  and  resubstitution,  for him and in his name,
place and stead,  in any and all  capacities  (until revoked in writing) to sign
any and all instruments,  certificates and documents  required to be executed on
behalf of himself  individually or on behalf of each or any of Summit  Ventures,
L.P., Summit Partners,  L.P., Stamps,  Woodsum & Co., Summit Partners' Holdings,
L.P., Summit Ventures II, L.P., Summit Partners II, L.P., Stamps,  Woodsum & Co.
II, SV Eurofund C.V., SV International,  L.P., Stamps,  Woodsum  International &
Co., Summit  Investors,  L.P.,  Summit Investors II, L.P., Summit Investors III,
L.P.,  Summit Ventures III, L.P., Summit Partners III, L.P.,  Stamps,  Woodsum &
Co. III, Summit Ventures IV, L.P., Summit Partners IV, L.P.,  Stamps,  Woodsum &
Co., IV,  Summit  Subordinated  Debt Fund,  L.P.,  Summit  Partners SD, L.P., SW
Management Corp., Summit Management Co., Summit Subordinated Debt Fund II, L.P.,
and Summit Partners SD II, LLC, pursuant to sections 13 and 16 of the Securities
Exchange  Act of  1934,  as  amended  (the  "Exchange  Act"),  and  any  and all
regulations  promulgated  thereunder,  and to file the same,  with all  exhibits
thereto,  and any other documents in connection  therewith,  with the Securities
and Exchange Commission,  and with any other entity when and if such is mandated
by the Exchange Act or by the By-laws of the National  Association of Securities
Dealers,  granting unto said attorney-in-fact and agent full power and authority
to do and perform each and every act and thing  requisite and necessary fully to
all intents and  purposes as she might or could do in person  thereby  ratifying
and confirming all that said  attorney-in-fact  and agent,  or her substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

                                  Page 31 of 41






     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ E. Roe Stamps, IV
                                             -----------------------------------
                                             E. Roe Stamps, IV

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this  10th day of  February,  1997,  before  me  personally  came E. Roe
Stamps,  IV,  known  to me to be the  person  described  and  who  executed  the
foregoing instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 32 of 41 






     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ Stephen G. Woodsum
                                             -----------------------------------
                                             Stephen G. Woodsum

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this 10th day of February,  1997,  before me personally  came Stephen G.
Woodsum,  known to me to be the person  described and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 33 of 41







     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ Martin J. Mannion 
                                             -----------------------------------
                                             Martin J. Mannion

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this 10th day of February,  1997,  before me  personally  came Martin J.
Mannion,  known to me to be the person  described and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 34 of 41








     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ John A. Genest
                                             -----------------------------------
                                             John A. Genest

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this  10th day of  February,  1997,  before me  personally  came John A.
Genest,  known to me to be the person  described  and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 35 of 41






     IN WITNESS  WHEREOF,  this Power of Attorney  has been signed as of the 3rd
day of February, 1997.

                                             /s/ Gregory M. Avis 
                                             -----------------------------------
                                             Gregory M. Avis

    State of California             )
                                    ) ss:
    County of Santa Clara           )

    

     On this 3rd day of February,  1997,  before me  personally  came Gregory M.
Avis,  known to me to be the person  described  and who executed  the  foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               Katherine C. Ely
                                               ---------------------------------
                                               Notary Public

                                               May 28, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 36 of 41







     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ Ernest K. Jacquet
                                             -----------------------------------
                                             Ernest K. Jacquet

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this 10th day of February,  1997,  before me  personally  came Ernest K.
Jacquet,  known to me to be the person  described and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 37 of 41








     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ Thomas S. Roberts
                                             -----------------------------------
                                             Thomas S. Roberts

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this 10th day of February,  1997,  before me  personally  came Thomas S.
Roberts,  known to me to be the person  described and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 38 of 41






 

     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ Bruce R. Evans
                                             -----------------------------------
                                             Bruce R. Evans

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this 10th day of  February,  1997,  before me  personally  came Bruce R.
Evans,  known to me to be the person  described  and who executed the  foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 39 of 41








     IN WITNESS  WHEREOF,  this Power of Attorney  has been signed as of the 3rd
day of February, 1997.

                                             /s/ Walter G. Kortschak
                                             -----------------------------------
                                             Walter G. Kortschak

    State of California             )
                                    ) ss:
    County of Santa Clara           )

    

     On this 3rd day of  February,  1997,  before me  personally  came Walter G.
Kortschak, known to me to be the person described and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Katherine C. Ely
                                               ---------------------------------
                                               Notary Public

                                               May 28, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 40 of 41

   




     IN WITNESS  WHEREOF,  this Power of Attorney has been signed as of the 10th
day of February, 1997.

                                             /s/ Joseph F. Trustey
                                             -----------------------------------
                                             Joseph F. Trustey

    Commonwealth of Massachusetts   )
                                    ) ss:
    County of Suffolk               )

    

     On this 10th day of February,  1997,  before me  personally  came Joseph F.
Trustey,  known to me to be the person  described and who executed the foregoing
instrument that he acknowledged that he executed the same.

    [Notary Seal]
                                               /s/ Cynthia R. Freedman
                                               ---------------------------------
                                               Notary Public

                                               October 20, 2000
                                               ---------------------------------
                                               My Comission expires:




                                  Page 41 of 41



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