SUMMIT DESIGN INC
SC 13G/A, 1998-02-17
PREPACKAGED SOFTWARE
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                                  SCHEDULE 13G

             INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (Amendment No. 2)*

                                  Summit Design
                                  -------------
                                (Name of Issuer)

                                     Common
                                     ------
                         (Title of Class of Securities)

                                    86605U101
                                    ---------
                                 (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 13 Pages
<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. 86605U101                                                  13G                                Page 2 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

              SEQUOIA CAPITAL GROWTH FUND 95-4107950
- ------------- ----------------------------------------------------------------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                               (a)     o
                                                                                              (b)     x
- ------------- ----------------------------------------------------------------------------------------------------------------------
     3        SEC USE ONLY


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

              California
- ----------------------------- ----------- ----- ------------------------------------------------------------------------------------
      NUMBER OF SHARES                     5    SOLE VOTING POWER ORIGINALLY FILED 2/97           AMENDMENT 2/98
 BENEFICIALLY OWNED BY EACH                    
   REPORTING PERSON WITH                        -0-                                               -0-
                                          ----- ------------------------------------------------------------------------------------
                                           6    SHARED VOTING POWER ORIGINALLY FILED 2/97         AMENDMENT 2/98

                                                1,019,555                                         9,120
                                          ----- ------------------------------------------------------------------------------------
                                           7    SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97      AMENDMENT 2/98

                                                -0-                                               -0-
                                          ----- ------------------------------------------------------------------------------------
                                           8    SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97    AMENDMENT 2/98

                                                1,019,555                                         9,120
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98

              1,019,555                                                                           9,120
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98

              7.7%                                                                                Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              PN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 2 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No.86605U101                                                   13G                                Page 3 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

              SEQUOIA PARTNERS (CF) 95-4107954
- ------------- ----------------------------------------------------------------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                               (a)     o
                                                                                              (b)     x
- ------------- ----------------------------------------------------------------------------------------------------------------------
     3        SEC USE ONLY


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

              California
- ---------------------------- ------- -----------------------------------------------------------------------------------------------
     NUMBER OF SHARES          5     SOLE VOTING POWER ORIGINALLY FILED 2/97                      AMENDMENT 2/98
BENEFICIALLY OWNED BY EACH             
   REPORTING PERSON WITH             -0-                                                          -0-
                             ------- -----------------------------------------------------------------------------------------------
                               6     SHARED VOTING POWER ORIGINALLY FILED 2/97                    AMENDMENT 2/98

                                     1,019,555                                                    9,120
                             ------- -----------------------------------------------------------------------------------------------
                               7     SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97                 AMENDMENT 2/98

                                     -0-                                                          -0-
                             ------- -----------------------------------------------------------------------------------------------
                               8     SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97               AMENDMENT 2/98

                                     1,019,555                                                    9,120
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98

              1,019,555                                                                           9,120
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98

              7.7%                                                                                Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              PN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 3 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. 86605U101                                                  13G                                Page 4 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

              SEQUOIA TECHNOLOGY PARTNERS III 95-4121745
- ------------- ----------------------------------------------------------------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                               (a)     o
                                                                                              (b)     X
- ------------- ----------------------------------------------------------------------------------------------------------------------
     3        SEC USE ONLY


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

              California
- ---------------------------- ------- -----------------------------------------------------------------------------------------------
     NUMBER OF SHARES          5     SOLE VOTING POWER ORIGINALLY FILED 2/97                      AMENDMENT 2/98
BENEFICIALLY OWNED BY EACH           
   REPORTING PERSON WITH             -0-                                                          -0-
                             ------- -----------------------------------------------------------------------------------------------
                               6     SHARED VOTING POWER ORIGINALLY FILED 2/97                    AMENDMENT 2/98

                                     65,076                                                       880
                             ------- -----------------------------------------------------------------------------------------------
                               7     SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97                 AMENDMENT 2/98

                                     -0-                                                          -0-
                             ------- -----------------------------------------------------------------------------------------------
                               8     SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97               AMENDMENT 2/98

                                     65,076                                                       880
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98

              65,076                                                                              880
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98

              Less than 1%                                                                        Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              PN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 4 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. 86605U101                                                  13G                                 Page 5 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

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


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

              US
- ----------------------------- ----------- ----- ------------------------------------------------------------------------------------
      NUMBER OF SHARES                     5    SOLE VOTING POWER ORIGINALLY FILED 2/97           AMENDMENT 2/98
 BENEFICIALLY OWNED BY EACH                     
   REPORTING PERSON WITH                        -0-                                               -0-
                                          ----- ------------------------------------------------------------------------------------
                                           6    SHARED VOTING POWER ORIGINALLY FILED 2/97         AMENDMENT 2/98

                                                1,084,631                                         10,000
                                          ----- ------------------------------------------------------------------------------------
                                           7    SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97      AMENDMENT 2/98
                                                
                                                -0-                                               -0-
                                          ----- ------------------------------------------------------------------------------------
                                           8    SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97    AMENDMENT 2/98

                                                1,084,631                                         10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98

              1,084,631                                                                           10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98

              8.1%                                                                                Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              IN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 5 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. -284155108                                                 13G                                Page 6 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

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


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

              US
- ----------------------------- ----------- ----- ------------------------------------------------------------------------------------
      NUMBER OF SHARES                     5    SOLE VOTING POWER ORIGINALLY FILED 2/97           AMENDMENT 2/98
 BENEFICIALLY OWNED BY EACH                     
   REPORTING PERSON WITH                        -0-                                               4,905
                                          ----- ------------------------------------------------------------------------------------
                                           6    SHARED VOTING POWER ORIGINALLY FILED 2/97         AMENDMENT 2/98

                                                1,084,631                                         10,000
                                          ----- ------------------------------------------------------------------------------------
                                           7    SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97      AMENDMENT 2/98
                                                
                                                -0-                                               4,905
                                          ----- ------------------------------------------------------------------------------------
                                           8    SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97    AMENDMENT 2/98

                                                1,084,631                                         10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98

              1,084,631                                                                           14,905
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98

              8.1%                                                                                Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              IN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 6 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. 86605U101                                                  13G                                Page 7 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

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


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

              US
- ----------------------------------------- ---------- ---- --------------------------------------------------------------------------
 NUMBER OF SHARES BENEFICIALLY OWNED BY               5   SOLE VOTING POWER ORIGINALLY FILED 2/97           AMENDMENT 2/98
       EACH REPORTING PERSON WITH                         -0-                                               -0-
                                                     ---- --------------------------------------------------------------------------
                                                      6   SHARED VOTING POWER ORIGINALLY FILED 2/97         AMENDMENT 2/98

                                                          1,084,631                                         10,000
                                                     ---- --------------------------------------------------------------------------
                                                      7   SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97      AMENDMENT 2/98
                                                             
                                                          -0-                                               -0-
                                                     ---- --------------------------------------------------------------------------
                                                      8   SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97    AMENDMENT 2/98

                                                          1,084,631                                         10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97            AMENDMENT 2/98

              1,084,631                                                                                     10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97                         AMENDMENT 2/98

              8.1%                                                                                          Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              IN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 7 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. -284155108                                                 13G                                Page 8 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

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


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

              US
- ----------------------------- ----------- ----- ------------------------------------------------------------------------------------
      NUMBER OF SHARES                     5    SOLE VOTING POWER ORIGINALLY FILED 2/97           AMENDMENT 2/98
 BENEFICIALLY OWNED BY EACH                     
   REPORTING PERSON WITH                        -0-                                               4,905
                                          ----- ------------------------------------------------------------------------------------
                                           6    SHARED VOTING POWER ORIGINALLY FILED 2/97         AMENDMENT 2/98

                                                1,084,631                                         10,000
                                          ----- ------------------------------------------------------------------------------------
                                           7    SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97      AMENDMENT 2/98
                                                  
                                                -0-                                               4,905
                                          ----- ------------------------------------------------------------------------------------
                                           8    SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97    AMENDMENT 2/98

                                                1,084,631                                         10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98

              1,084,631                                                                           14,905
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98

              8.1%                                                                                Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              IN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                         Page 8 of 13 Pages

<PAGE>






<TABLE>
<S>                                                                  <C>                  <C>
- -----------------------------------------------------                                     ------------------------------------------
CUSIP No. -284155108                                                 13G                                Page 9 of 13 Pages
- -----------------------------------------------------                                     ------------------------------------------

- ------------- ----------------------------------------------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSONS
              S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

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


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

              UK
- ----------------------------- ----------- ----- ------------------------------------------------------------------------------------
      NUMBER OF SHARES                     5    SOLE VOTING POWER ORIGINALLY FILED 2/97           AMENDMENT 2/98
 BENEFICIALLY OWNED BY EACH                     
   REPORTING PERSON WITH                        -0-                                               -0-
                                          ----- ------------------------------------------------------------------------------------
                                           6    SHARED VOTING POWER ORIGINALLY FILED 2/97         AMENDMENT 2/98
                                                1,084,631                                         10,000
                                          ----- ------------------------------------------------------------------------------------
                                           7    SOLE DISPOSITIVE POWER ORIGINALLY FILED 2/97      AMENDMENT 2/98
                                                -0-                                               -0-
                                          ----- ------------------------------------------------------------------------------------
                                           8    SHARED DISPOSITIVE POWER ORIGINALLY FILED 2/97    AMENDMENT 2/98
                                                
                                                1,084,631                                         10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     9        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ORIGINALLY FILED 2/97  AMENDMENT 2/98
              1,084,631                                                                           10,000
- ------------- ----------------------------------------------------------------------------------------------------------------------
     10       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*


- ------------- ----------------------------------------------------------------------------------------------------------------------
     11       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 ORIGINALLY FILED 2/97               AMENDMENT 2/98
              8.1%                                                                                Less than 1%
- ------------- ----------------------------------------------------------------------------------------------------------------------
     12       TYPE OF REPORTING PERSON*

              IN
- ------------- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
                                                        Page 9 of 13 Pages


<PAGE>



       (a)        Name of Issuer:           Summit Design, INC
                                                     
       (b)        Address of Issuer's Principal Executive Offices:
                                            9305 S.W. Gemini Drive
                                            Beaverton, Oregon 97005
Item 2.

       (a)        Name of Persons Filing:
                                            Sequoia Capital Growth Fund ("SCGF")
                                            Sequoia Partners (CF) ("SP(CF)")
                                            Sequoia Technology Partners III 
                                             ("STP III")
                                            Pierre Lamond ("PL")
                                            Donald T. Valentine ("DTV")
                                            Thomas F. Stephenson ("TFS")
                                            Gordon Russell ("GR")
                                            Michael Moritz ("MM")


SP(CF) is the  General  Partners  of SCGF.  TFS,  PL, DTV, GR and MM are General
Partners of SP(CF) and STP III.

       (b)        Address of Principal Business Office or, if None, Residence:
                                            3000 Sand Hill Road
                                            Building 4, Suite 280
                                            Menlo Park, CA  94025

       (c)        Citizenship:
                                            SCGF, SP(CF), STP III, :  California
                                            PL, DTV, TFS, GR:  United States; 
                                              MM: UK

       (d)        Title of Class of Securities:
                                            Common Stock

       (e)        CUSIP Number:     86605U101


Item 3. If this statement is filed pursuant to Rules 13d-1(b),or 13d-2(b), check
whether the person filing is a:

Not applicable

Item 4.  Ownership

See Rows 5 through 11 of cover pages

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

       If this  statement  is being filed to report the fact that as of the date
hereof the reporting  person has ceased to be the beneficial  owner of more than
five percent of the class of securities, check the following: [X]

       Instruction. Dissolution of a group requires a response to this item.


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

                              Page 10 of 13 Pages

<PAGE>

Item 8.  Identification and Classification of Members of the Group

Not applicable

Item 9.  Notice of Dissolution of Group

Not applicable

Item 10. Certification

       [The following  certification shall be included if the statement is filed
pursuant to Rule 13d-1(b):]

       By signing  below I certify that, to the best of my knowledge and belief,
the  securities  referred  to above  were  acquired  in the  ordinary  course of
business  and were not acquired for the purpose of and do not have the effect of
changing or  influencing  the control of the issuer of such  securities and were
not acquired in connection  with or as a participant in any  transaction  having
such purpose or effect.]


[EXHIBITS]

[A:    Joint Filing Statement]


                              Page 11 of 13 Pages

<PAGE>



                                    SIGNATURE

       After  reasonable  inquiry and to the best of my knowledge and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.

Date:  February 5, 1997

SEQUOIA CAPITAL GROWTH FUND
By its General Partner
Sequoia Partners (CF)

SEQUOIA TECHNOLOGY PARTNERS III


- --------------------------------
Thomas F. Stephenson, General Partner




- --------------------------------
Pierre Lamond


- --------------------------------
Donald T. Valentine


- --------------------------------
Thomas F. Stephenson


- --------------------------------
Gordon Russell


- --------------------------------
Michael Moritz


                              Page 12 of 13 Pages


<PAGE>


                                    EXHIBIT A

                             JOINT FILING STATEMENT

       Pursuant to Rule  13d-1(f)(1),  we, the  undersigned,  hereby express our
agreement that the attached Schedule 13G is filed on behalf of each of us.

Date:  February 5, 1997

SEQUOIA CAPITAL GROWTH
By Sequoia Partners (CF)
Its General Partner

SEQUOIA TECHNOLOGY PARTNERS III


- --------------------------------
Thomas Stephenson, General Partner



- --------------------------------
Donald T. Valentine


- --------------------------------
Pierre Lamond


- --------------------------------
Thomas F. Stephenson


- --------------------------------
Gordon Russsell


- --------------------------------
Michael Moritz




                              Page 13 of 13 Pages


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