DIGITAL GENERATION SYSTEMS INC
SC 13G/A, 2000-05-15
ADVERTISING AGENCIES
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G
                                 (Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS  FILED PURSUANT TO RULES 13d-1(b),  (c)
AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b)

                               (Amendment No._2_)*
                                        -

                        DIGITAL GENERATION SYSTEMS, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


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

                                   253921 10 0
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                                  May 15, 2000
- --------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

         Check the  appropriate box to designate the rule pursuant to which this
         Schedule is filed:

         [   ]   Rule 13d-1(b)
         [ X ]   Rule 13d-1(c)
         [   ]   Rule 13d-1(d)


*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
disclosures provided in a prior cover page.

         The information  required on 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).

                         (Continued on following pages)

                               Page 1 of 17 Pages

                       Exhibit Index Contained on Page 15


<PAGE>


<TABLE>
<CAPTION>

- -----------------------------------------------------------                 --------------------------------------------------
<S>        <C>                                                   <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 2 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Management III, L.P. ("ICM3")

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

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       -0-
                SHARES
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           -0-
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      0 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
            PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           0.0%
    11
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 PN
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                            *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>

<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>        <C>                                                   <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 3 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Management IV, LLC ("ICM4")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                      (a)  [ ]    (b)   [X]
- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited liability company)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       670,751 shares, which shares are directly owned by Integral
                SHARES                                     Capital Partners IV, L.P. ("ICP4").  ICM4 is the general partner
             BENEFICIALLY                                  of ICP4
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           670,751 shares (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      670,751 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           2.4%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 OO
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                             *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>



<PAGE>

<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>        <C>                                                   <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 4 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners NBT, LLC ("Integral NBT")
- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                      (a)  [ ]    (b)   [X]
- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited liability company)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       3,426 shares, which shares are directly owned by Integral Capital
                SHARES                                     Partners IV MS Side Fund, L.P. ("Side Fund").  Integral NBT is
             BENEFICIALLY                                  the general partner of Side Fund
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           3,426 shares (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      3,426 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           0.00%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 OO
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                             *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>

<TABLE>
<CAPTION>
- -----------------------------------------------------------                 --------------------------------------------------
<S>        <C>                                                   <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 5 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners III, L.P. ("ICP3")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                      (a)  [ ]    (b)   [X]
- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       -0-
                SHARES
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           -0-
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      0 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           0.0%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 PN
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                             *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>

<TABLE>
<CAPTION>

- -----------------------------------------------------------                 --------------------------------------------------
<S>        <C>                                                   <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 6 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners International III, L.P. ("ICPI3")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                                                      (a)  [ ]    (b)   [X]
- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Cayman Islands (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                       -0-
                SHARES
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           -0-
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      0 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           0.0%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 PN
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                             *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>


<TABLE>
<CAPTION>

- -----------------------------------------------------------                 --------------------------------------------------
<S>                                                              <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 7 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners IV, L.P. ("ICP4")

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

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                  670,751 shares are directly owned by ICP4.  Integral Capital
                SHARES                                Management IV, LLC is the general partner of ICP4.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           670,751 shares (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      670,751 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           2.4%
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 PN
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                             *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>


<TABLE>
<CAPTION>

- -----------------------------------------------------------                 --------------------------------------------------
<S>        <C>                                                   <C>        <C>
CUSIP NO.  253921 10 0                                           13D        Page 8 of 17 Pages
- -----------------------------------------------------------                 --------------------------------------------------

- ----------- ------------------------------------------------------------------------------------------------------------------
    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
                     Integral Capital Partners IV MS Side Fund, L.P. ("Side Fund")

- ----------- ------------------------------------------------------------------------------------------------------------------
    2       CHECK APPROPRIATE BOX IF A MEMBER OF A GROUP*

            (a)             (b)  X

- ----------- ------------------------------------------------------------------------------------------------------------------
    3       SEC USE ONLY
- ----------- ------------------------------------------------------------------------------------------------------------------
    4       CITIZENSHIP OR PLACE OF ORGANIZATION
                     Delaware (limited partnership)
- --------------------------------------- --------- ----------------------------------------------------------------------------
                                           5      SOLE VOTING POWER                   -0-
                                        --------- ----------------------------------------------------------------------------
                NUMBER                     6      SHARED VOTING POWER
                  OF                                  3,426  shares are  directly  owned by Side  Fund.  Integral
                CAPITAL                               Capital  Partners  NBT,  LLC is the  investment  general
                PARTNER                               of Side Fund.
             BENEFICIALLY
            OWNED BY EACH
              REPORTING
                PERSON
                 WITH
                                        --------- ----------------------------------------------------------------------------
                                           7      SOLE DISPOSITIVE POWER              -0-
                                        --------- ----------------------------------------------------------------------------
                                           8      SHARED DISPOSITIVE POWER
                                                           3,426 shares (see response to Item 6)
- ----------- ------------------------------------------------------------------------------------------------------------------
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                                      3,426 shares
- ----------- ------------------------------------------------------------------------------------------------------------------
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES*
                                                                                      [ ]
- ----------- ------------------------------------------------------------------------------------------------------------------
            PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9                           0.00%
    11
- ----------- ------------------------------------------------------------------------------------------------------------------
    12      TYPE OF REPORTING PERSON*                                                 PN
- ----------- ------------------------------------------------------------------------------------------------------------------
<FN>
                                             *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>



                                                                    Page 9 of 17


ITEM 1(a).        NAME OF ISSUER:
                  --------------

                  Digital Generation Systems, Inc.

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
                  -----------------------------------------------

                  875 Battery Street, 2nd Floor
                  San Francisco, CA  94111

ITEM 2(a), (b), (c).       NAME OF PERSON FILING, ADDRESS OF PRINCIPAL BUSINESS
                           OFFICE OR, IF NONE, RESIDENCE,
                           AND CITIZENSHIP:

                  This statement is being filed by Integral  Capital  Management
III, L.P., a Delaware limited partnership ("ICM3"),  Integral Capital Management
IV, LLC, a Delaware  limited  liability  company  ("ICM4") and Integral  Capital
Partners NBT, LLC, a Delaware limited  liability  company  ("Integral NBT"). The
principal  business  address of ICM3,  ICM4 and  Integral  NBT is 2750 Sand Hill
Road, Menlo Park, California 94025.

                  ICM3 is the general partner of Integral  Capital Partners III,
L.P.,  a Delaware  limited  partnership  ("ICP3"),  and the  investment  general
partner of Integral Capital Partners  International  III, L.P., a Cayman Islands
exempted limited partnership ("ICPI3").  ICM4 is the general partner of Integral
Capital Partners IV, L.P., a Delaware limited partnership ("ICP4"). Integral NBT
is the general  partner of Integral  Capital  Partners IV MS Side Fund,  L.P., a
Delaware  limited  partnership  ("Side  Fund").  With respect to ICM3,  ICM4 and
Integral NBT, this statement  relates only to ICM3's,  ICM4's and Integral NBT's
indirect,  beneficial  ownership  of shares of Common  Stock of the Issuer  (the
"Shares").  The Shares have been purchased by ICP3, ICPI3,  ICP4, and Side Fund,
and none of ICM3,  ICM4, or Integral NBT directly or otherwise  hold any Shares.
Management of the business  affairs of ICM3,  ICM4 and Integral  NBT,  including
decisions  respecting  disposition  and/or  voting of the  Shares,  resides in a
majority of the general  partners or managers of ICM3,  ICM 4 and Integral  NBT,
respectively  such that no single general  partner of ICM3, ICM4 or Integral NBT
has voting and/or dispositive power of the Shares.

ITEM 2(d).        TITLE OF CLASS OF SECURITIES:
                  ----------------------------

                  Common Stock

ITEM 2(e).        CUSIP NUMBER:
                  ------------

                  253921100


<PAGE>



                                                                   Page 10 of 17


ITEM 3. IF THIS  STATEMENT IS FILED  PURSUANT TO RULE  13d-1(b),  or 13d-2(b) or
(c), CHECK WHETHER THE PERSON FILING IS A:

         (a) [ ]   Broker or dealer registered under Section 15 of the
                   Exchange Act.
         (b) [ ]   Bank as defined in Section 3(a)(6) of the Exchange Act.
         (c) [ ]   Insurance company as defined in Section 3(a)(19) of the
                   Exchange Act.
         (d) [ ]   Investment company registered under Section 8 of the
                   Investment Company Act.
         (e) [ ]   An investment adviser in accordance with Rule 13d-1(b)(1)
                   (ii)(E);
         (f) [ ]   An employee benefit plan or endowment fund in accordance with
                   Rule 13d-1(b)(1)(ii)(F);
         (g) [ ]   A parent holding company or control person in accordance with
                   Rule 13d-1(b)(1)(ii)(G);
         (h) [ ]   A savings association as defined in Section 3(b) of the
                   Federal Deposit Insurance Act;
         (i) [ ]   A church plan that is excluded from the definition of an
                   investment company under Section 3(c)(14) of the Investment
                   Company Act;
         (j) [ ]   Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

         If this statement is filed pursuant to Rule 13d-1(c),
         check this box. [X].

ITEM 4.  OWNERSHIP.
         ---------

         Provide the following  information  regarding the aggregate  number and
percentage of the class of securities of the issuer identified in Item 1.

         A.       Integral Capital Management III, L.P. ("ICM3")

                  (a)      Amount Beneficially Owned:  -0-
                  (b)      Percent of Class: 0.0%
                  (c)      Number of shares as to which such person has:
                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: -0-
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: -0-



<PAGE>


                                                                   Page 11 of 17

         B.       Integral Capital Management IV, LLC ("ICM4")

                  (a)      Amount Beneficially Owned:  670,751
                  (b)      Percent of Class: 2.4%
                  (c)      Number of shares as to which such person has:
                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: 670,751
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: 670,751

         C.       Integral Capital Partners NBT, LLC ("Integral NBT")
                  ---------------------------------------------------

                  (a)      Amount Beneficially Owned:  3,426
                  (b)      Percent of Class:  0.00%
                  (c)      Number of shares as to which such person has:
                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: 3,426
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: 3,426

         D.       Integral Capital Partners III, L.P.

                  (a)      Amount Beneficially Owned:  -0-
                  (b)      Percent of Class:  0.0%
                  (c)      Number of shares as to which such person has:
                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: -0-
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: -0-


         E.       Integral Capital Partners International III, L.P.
                  -------------------------------------------------

                  (a)      Amount Beneficially Owned:  -0-
                  (b)      Percent of Class: 0.0%
                  (c)      Number of shares as to which such person has:

                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: -0-
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: -0-



<PAGE>



                                                                   Page 12 of 17

         F.       Integral Capital Partners IV, L.P.

                  (a)      Amount Beneficially Owned:  670,751
                  (b)      Percent of Class: 2.4%
                  (c)      Number of shares as to which such person has:

                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: 670,751
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: 670,751

         G.       Integral Capital Partners IV MS Side Fund, L.P.
                  -----------------------------------------------

                  (a)      Amount Beneficially Owned:  3,426
                  (b)      Percent of Class:  0.00%
                  (c)      Number of shares as to which such person has:

                           1.  Sole power to vote or to direct vote: -0-
                           2.  Shared power to vote or to direct vote: 3,426
                           3.  Sole   power  to   dispose   or  to  direct   the
                               disposition: -0-
                           4.  Shared   power  to   dispose  or  to  direct  the
                               disposition: 3,426

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 ].

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 CLASSIFCATION OF MEMBERS OF THE GROUP.
         --------------------------------------------------------

         Not applicable.

ITEM 9.  NOTICE OF DISSOLUTION OF GROUP.
         ------------------------------

         Not applicable.

<PAGE>

                                                                   Page 13 of 17

ITEM 10. CERTIFICATION.
         -------------

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

                                    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.

Dated:  May 15, 2000

                                           INTEGRAL CAPITAL MANAGEMENT III, L.P.


                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a General Partner


                                            INTEGRAL CAPITAL MANAGEMENT IV, LLC


                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a Manager

                                            INTEGRAL CAPITAL PARTNERS NBT, LLC


                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a Manager


                                            INTEGRAL CAPITAL PARTNERS III, L.P.

                                            By Integral Capital Management III,
                                            L.P., its General Partner

                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a General Partner

<PAGE>

                                                                   Page 14 of 17


                                            INTEGRAL CAPITAL PARTNERS
                                            INTERNATIONAL III, L.P.

                                            By Integral Capital Management III,
                                            L.P., its Investment General Partner

                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a General Partner


                                            INTEGRAL CAPITAL PARTNERS IV, L.P.

                                            By Integral Capital Management IV,
                                            LLC, its General Partner

                                            By        /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                      Pamela K. Hagenah
                                                      a Manager


                                            INTEGRAL CAPITAL PARTNERS IV MS SIDE
                                            FUND, L.P.

                                            By Integral Capital Partners NBT,
                                            LLC, its General Partner

                                            By       /s/ Pamela K. Hagenah
                                               -----------------------------
                                                     Pamela K. Hagenah
                                                     a Manager



<PAGE>


                                                                   Page 15 of 17


                                  EXHIBIT INDEX

                                                                 Found on
                                                                 Sequentially
Exhibit                                                          Numbered Page
- -------                                                          ---------------
Exhibit A:        Agreement of Joint Filing                            16



<PAGE>



                                                                   Page 16 of 17


                                    EXHIBIT A

                            Agreement of Joint Filing
                            -------------------------

                  The  undersigned  hereby  agree that they are  filing  jointly
pursuant  to Rule  13d-1(k)(1)  of the  Act the  statement  dated  May 12,  2000
containing the  information  required by Schedule 13G, for the 674,177 Shares of
capital  stock of Digital  Generation  Systems,  Inc.  held by Integral  Capital
Partners IV, L.P., a Delaware limited partnership, and Integral Capital Partners
IV MS Side Fund, L.P., a Delaware limited partnership.

Date:  May 15, 2000
                                           INTEGRAL CAPITAL MANAGEMENT III, L.P.


                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a General Partner


                                            INTEGRAL CAPITAL MANAGEMENT IV, LLC


                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a Manager

                                            INTEGRAL CAPITAL PARTNERS NBT, LLC


                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a Manager


<PAGE>


                                                                   Page 17 of 17


                                            INTEGRAL CAPITAL PARTNERS III, L.P.

                                            By Integral Capital Management III,
                                            L.P., its General Partner

                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a General Partner

                                            INTEGRAL CAPITAL PARTNERS
                                            INTERNATIONAL III, L.P.

                                            By Integral Capital Management
                                            III, L.P., its Investment General
                                            Partner

                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a General Partner


                                            INTEGRAL CAPITAL PARTNERS IV, L.P.

                                            By Integral Capital Management IV,
                                            LLC, its General Partner

                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a Manager


                                            INTEGRAL CAPITAL PARTNERS IV MS SIDE
                                            FUND, L.P.

                                            By Integral Capital Partners NBT,
                                            LLC, its General Partner

                                            By       /s/ Pamela K. Hagenah
                                               ---------------------------------
                                                     Pamela K. Hagenah
                                                     a Manager



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