EXCELON CORP
DEF 14A, 2000-04-21
PREPACKAGED SOFTWARE
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                                  SCHEDULE 14A
                                 (Rule 14a-101)
                     INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934


Filed by the Registrant [X]
Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[ ] Preliminary Proxy Statement
[ ] Confidential,  For  Use  of  the  Commission  Only  (as  permitted  by  Rule
    14a-6(e)(2))
[X] Definitive Proxy Statement
[ ] Definitive Additional Materials
[ ] Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12

                               eXcelon Corporation
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

                                 Not Applicable
- --------------------------------------------------------------------------------
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):
    [X] No fee required.
    [ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
         1) Title of each class of securities to which transaction applies:
         2) Aggregate number of securities to which transaction applies:
         3) Per unit  price or  other underlying  value of  transaction computed
            pursuant to Exchange Act Rule 0-11:*
         4) Proposed maximum aggregate value of transaction:
         5) Total fee paid:

*Set forth the amount on which the filing fee is calculated and state how it was
determined.

    [ ] Fee paid previously with preliminary materials:

    [ ] Check  box if any part of  the fee is offset as provided by Exchange Act
        Rule 0-11(a)(2) and identify the filing for which the offsetting fee was
        paid previously.  Identify the previous filing by registration statement
        number, or the Form or Schedule and the date of its filing.

        1) Amount Previously Paid:

        2) Form, Schedule or Registration Statement No.:

        3) Filing Party:

        4) Date Filed:
<PAGE>
                               EXCELON CORPORATION
                                  25 Mall Road
                         Burlington, Massachusetts 01803
                                ----------------
                    NOTICE OF ANNUAL MEETING OF STOCKHOLDERS
                                  May 24, 2000
                                ----------------
To the Stockholders of eXcelon Corporation:

NOTICE IS HEREBY  GIVEN  that the  Annual  Meeting  of  stockholders  of eXcelon
Corporation (the "Company") will be held at the offices of the Company,  25 Mall
Road, Burlington,  Massachusetts 01803, on Wednesday, May 24, 2000, beginning at
10:00 A.M., local time, for the following purposes:

   1.    To consider and vote upon the election of one Class I Director;

   2.    To  consider  and vote upon a  proposal  to  ratify  the  adoption  and
         approval by the Board of Directors  of an  amendment  to the  Company's
         1996 Employee  Stock  Purchase Plan to increase the number of shares of
         Common Stock available for issuance thereunder by 200,000;

   3.    To  consider  and vote  upon a  proposal  to amend the  Company's  1996
         Incentive and Nonqualified  Stock Option Plan to increase the number of
         shares of Common Stock available for grant thereunder by 1,000,000; and

   4.    To  transact  such  further  business as may  properly  come before the
         Meeting or any adjournments or postponements thereof.

     The Board of Directors has fixed the close of business on Wednesday,  April
5, 2000 as the record  date for the  determination  of the  stockholders  of the
Company  entitled to notice of, and to vote at, the Meeting and any adjournments
or postponements thereof.  Accordingly, only stockholders of record on such date
are  entitled to notice of, and to vote at, the Meeting or any  adjournments  or
postponements thereof.

                                             By Order of the Board of Directors,


                                             John D. Patterson, Jr.
                                             Secretary

Burlington, Massachusetts
April 24, 2000


                             YOUR VOTE IS IMPORTANT

THE  BOARD  OF  DIRECTORS  SOLICITS  THE  EXECUTION  AND  PROMPT  RETURN  OF THE
ACCOMPANYING  PROXY.  PLEASE SIGN AND RETURN THE ENCLOSED PROXY,  WHETHER OR NOT
YOU PLAN TO ATTEND THE MEETING. IF YOU ATTEND THE MEETING,  YOU MAY WITHDRAW ANY
               PROXY GIVEN BY YOU AND VOTE YOUR SHARES IN PERSON.



<PAGE>
                               EXCELON CORPORATION
                                  25 Mall Road
                         Burlington, Massachusetts 01803
                                 (781) 674-5000
                                ----------------
                                 PROXY STATEMENT
                                ----------------
                         ANNUAL MEETING OF STOCKHOLDERS
                                  May 24, 2000

                    PROXY SOLICITATION, VOTING AND REVOCATION

     This Proxy  Statement  and the enclosed  form of proxy are furnished to the
holders of Common  Stock,  $.001 par value per share (the  "Common  Stock"),  of
eXcelon  Corporation  (the "Company") in connection with the solicitation by the
Board of Directors of the Company of proxies to be used at the Annual Meeting of
Stockholders of the Company,  to be held at the offices of the Company,  25 Mall
Road, Burlington, Massachusetts 01803, at 10:00 A.M. on Wednesday, May 24, 2000,
and at any and all adjournments or postponements thereof (the "Annual Meeting").
When proxies are returned  properly  executed,  the shares  represented  will be
voted  in  accordance  with  the  stockholders'  directions.   Stockholders  are
encouraged  to vote on the  matters  to be  considered.  If no  choice  has been
specified by a  stockholder,  however,  the shares covered by any executed proxy
will be voted as recommended by management. Any stockholder may revoke his proxy
at any time before it has been exercised.

    This Proxy Statement and proxies for use at the Annual Meeting will be first
mailed  to  stockholders  on or about  April  24,  2000.  Such  proxies  will be
solicited  chiefly  by  mail.  No  compensation  will be paid by any  person  in
connection with the solicitation of proxies.  Brokers,  banks and other nominees
will be  reimbursed  for  their  out-of-pocket  expenses  and  other  reasonable
clerical expenses  incurred in obtaining  instructions from beneficial owners of
the Common Stock. In addition to the solicitation by mail, special  solicitation
of proxies  may, in certain  instances,  be made  personally  or by telephone by
Directors,  officers and certain  employees of the Company.  It is expected that
the expense of such special  solicitation will be nominal. All expenses incurred
in connection with this solicitation will be borne by the Company.

                                   RECORD DATE

     The Board of  Directors  of the  Company has fixed the close of business on
Wednesday,  April  5,  2000 as the  record  date  for the  determination  of the
stockholders  of the  Company  entitled to notice of, and to vote at, the Annual
Meeting and any adjournment  thereof.  Only  stockholders of record on such date
are  entitled  to  notice  of,  and to  vote  at,  the  Annual  Meeting  and any
adjournments or  postponements  thereof.  At the close of business on the record
date,  there were  issued and  outstanding  29,233,592  shares of the  Company's
Common Stock, entitled to cast 29,233,592 votes.

                         QUORUM AND TABULATION OF VOTES

     The  By-Laws of the  Company  provide  that a quorum at the Annual  Meeting
shall consist of a majority in interest of all stock issued and  outstanding and
entitled to vote at the Annual Meeting.  Shares of Common Stock represented by a
properly  signed  and  returned  proxy  will be treated as present at the Annual
Meeting for purposes of  determining a quorum.  In general,  votes withheld from
any nominee for election as Director,  abstentions  (if  applicable)  and broker
"non-votes"  (if  applicable) are counted as present or represented for purposes
of  determining  the presence or absence of a quorum for the Annual  Meeting.  A
"non-vote" occurs when a broker or nominee holding shares for a beneficial owner
votes on one proposal, but does not vote on another proposal because, in respect
of such other proposal, the broker or nominee does not have discretionary voting
power and has not received instructions from the beneficial owner.

     The affirmative  vote of a plurality of the shares of Common Stock properly
cast at the  Annual  Meeting  will be  necessary  to elect the Class I  Director
pursuant to Proposal One. Abstentions,  votes "withheld" from  Director-nominees
and broker  "non-votes"  will not be included in calculating the number of votes
cast on Proposal One, and, therefore,  will have no effect on the outcome of the
vote for such Proposal.
<PAGE>

     The  affirmative  vote of a majority of the shares of Common Stock properly
cast at the Annual  Meeting  will be  necessary  to approve  Proposal  Two,  the
proposal to amend the Company's 1996 Employee  Stock Purchase Plan.  Abstentions
and broker  "non-votes"  will not be included in calculating the number of votes
cast on Proposal Two, and, therefore,  will have no effect on the outcome of the
vote for such Proposal.

The  affirmative  vote of a majority of the shares of Common Stock properly cast
at the Annual Meeting will be necessary to approve  Proposal Three, the proposal
to amend the  Company's  1996  Incentive  and  Nonqualified  Stock  Option Plan.
Abstentions  and broker  "non-votes"  will not be  included in  calculating  the
number of votes cast on Proposal Three, and,  therefore,  will have no effect on
the outcome of the vote for such Proposal.

     Votes will be tabulated by the Company's transfer agent,  EquiServe Limited
Partnership. The vote on each matter submitted to stockholders will be tabulated
separately.


                                  PROPOSAL ONE
                              ELECTION OF DIRECTORS

     The Board of  Directors  is  divided  into three  classes,  one of which is
elected each year at the annual meeting of stockholders for a three-year term of
office.  All  Directors  hold office until the date of the third annual  meeting
following their election and thereafter  until their  successors are elected and
qualified  or until any such  Director  sooner  dies,  resigns,  is removed,  or
becomes  disqualified.  The terms of the Company's Class I Directors  (currently
Gerald B. Bay and David A. Litwack) will expire immediately following the Annual
Meeting. Class II Directors (currently Arthur J. Marks and Robert M. Agate) will
serve until 2001, and Class III Directors (currently Robert N. Goldman and Kevin
J. Burns) will serve until 2002.

     The Board of Directors has  nominated  Gerald B. Bay for  re-election  as a
Class I Director of the Company.  Mr. Litwack has chosen not to be re-nominated.
If re-elected, Mr. Bay will serve until the annual meeting of stockholders to be
held in 2003, and until his successor has been duly elected and  qualified.  Mr.
Bay has agreed to serve if  elected,  and the  Company  has no reason to believe
that he will be unable to serve. In the event that Mr. Bay is unable or declines
to serve as a Director at the time of the Annual Meeting,  proxies will be voted
for such other nominee as is then designated by the Board of Directors.

    THE BOARD  RECOMMENDS  THAT YOU VOTE FOR THE PROPOSAL TO RE-ELECT  GERALD B.
BAY AS A CLASS I DIRECTOR OF THE COMPANY.


                        DIRECTORS AND EXECUTIVE OFFICERS

The following table sets forth certain information with respect to the executive
officers and Directors of the Company:

<TABLE>
<CAPTION>
             Name                     Age                          Position                        Director   Term       Class
             -----                    ---                          --------                        Since      Expires    -----
                                                                                                   --------   -------
<S>                                  <C>   <C>                                                    <C>        <C>          <C>
Robert N. Goldman .............       50    Chairman of the Board of Directors, President and      1995       2002         III
                                            Chief Executive Officer

Lacey P. Brandt ...............       42    Chief Financial Officer and Treasurer                  --------   --------   -----

Dan O'Connor ..................       43    Senior Vice President, Business Development            --------   --------   -----

Brian W. Otis .................       41    Senior Vice President, Operations                      --------   --------   -----

Ross A. Hinchcliffe ...........       38    Vice President, Worldwide Sales                        --------   --------   -----

Satish Maripuri................       34    Vice President, Worldwide Consulting                   --------   --------   -----

Lawrence E. Alston, Jr. .......       38    Vice President, Marketing                              --------   --------   -----

Gerald B. Bay (1)(2) ..........       60    Director                                               1988       2000         I

Kevin J. Burns (1) ............       50    Director                                               1997       2002         III

David A. Litwack (2) ..........       53    Director                                               1997       2000         I

Arthur J. Marks (1)(2) ........       55    Director                                               1990       2001         II

Robert M. Agate................       64    Director                                               2000       2001         II

</TABLE>

- ------------
 (1) Member of the Audit Committee
 (2) Member of the Compensation Committee

                                       2
<PAGE>
    Mr. Goldman has served as Chairman of the Board of the Company since January
1999, and was elected  President and Chief  Executive  Officer of the Company in
September  1999. Mr. Goldman had earlier served as President and Chief Executive
Officer of the Company from the time he joined  eXcelon  Corporation in November
1995 until  January 1999.  Mr.  Goldman has been a Director of the Company since
August 1995.  Prior to joining the Company,  Mr. Goldman was Chairman of Trinzic
Corporation from 1992 to 1995. Mr. Goldman is a member of the Board of Directors
of Citrix Systems, Inc., NetGenesis Corp., Parametric Technology Corporation and
NetCentric Corporation.

    Ms. Brandt has been the Chief  Financial  Officer of the Company since April
1996.  Prior to joining the Company,  Ms.  Brandt served as Director of Finance,
Controller  and  Treasurer  of  International   Integration   Incorporated  from
September 1995 to April 1996.  Ms. Brandt was Director of Investor  Relations at
Proteon, Inc. from 1993 to September 1995.

    Mr.  O'Connor has been Senior Vice President,  Business  Development for the
Company since he joined eXcelon  Corporation in June 1999.  Prior to joining the
Company, Mr. O'Connor was Vice President and General Manager of Intercontinental
Subsidiaries for Inprise Corporation from October 1994 to January 1999.

    Mr. Otis has been Senior Vice  President,  Operations  for the Company since
September 1999 and served as Senior Vice President of Development of the Company
from July 1998 to September 1999, Vice President,  Professional  Services of the
Company from June 1995 to July 1998, and as a Consulting Manager, Eastern Region
for the Company from 1993 to June 1995.

    Mr.  Hinchcliffe  has been Vice  President,  Worldwide Sales for the Company
since  September 1999 and Vice  President,  Pacific  Division and Regional Sales
Director of the Company since October  1997.  Prior to joining the Company,  Mr.
Hinchcliffe was employed as a Regional Sales Director for Parametric  Technology
Corporation from June 1994 to October 1997.

    Mr.  Maripuri has been Vice  President,  Worldwide  Services for the Company
since September 1999 and served as Vice President,  Services and eSolutions from
September 1998 to September 1999 and Director, Professional Services from August
1996 to September  1998.  Prior to joining the Company,  Mr.  Maripuri served as
Project  Leader for Core  Engineering at  Computervision  from September 1991 to
April 1993.

    Mr. Alston has been the Vice  President,  Marketing of the Company since May
1998 and was Director of Product  Management  for the Company from November 1996
to May  1998,  and a Product  Manager  for the  Company  from  November  1993 to
November 1996.

    Mr. Bay has been a Director of the Company since 1988.  Since 1980,  Mr. Bay
has been a  Managing  Partner  of The Vista  Group.  Mr.  Bay  served as interim
President of the Company from August to November 1995.

    Mr. Burns has been a Director of the Company since  October 1997.  Mr. Burns
has been Managing Principal of Lazard Technology  Partners since July 1998. From
1990 until July 1998, Mr. Burns was Chairman of the Board of INTERSOLV, Inc. Mr.
Burns was the Chief Executive Officer of INTERSOLV, Inc. from 1986 to 1996.

    Mr. Litwack has been a Director of the Company since  December  1997.  Since
May 1997,  Mr.  Litwack  has been  President  and  Chief  Executive  Officer  of
SilverStream   Software,   Inc.  Mr.  Litwack  was  Vice  President  of  Product
Development  of Powersoft  Corporation  from 1988 until 1992, and then served as
President of Powersoft from 1992 until the company's  merger with Sybase Inc. in
December,  1994.  From the time of the merger  until May 1997,  Mr.  Litwack was
Executive Vice President of Sybase Inc.

    Mr.  Marks has been a Director of the Company  since 1990.  Since 1984,  Mr.
Marks has been a General  Partner of New Enterprise  Associates.  Mr. Marks is a
member of the Board of  Directors  of Progress  Software,  Epicor  Software  and
Talk.com.

    Mr.  Agate has been a Director  of the Company  since April 2000.  From 1992
until his retirement in July 1996, Mr. Agate was Senior Executive Vice President
and Chief Financial Officer of Colgate-Palmolive  Company. Mr. Agate is a member
of the Board of Directors of Timberland Company.

                                       3
<PAGE>

    Executive  officers  of the  Company  are  elected  annually by the Board of
Directors and serve until the first meeting of the Directors  following the next
annual meeting of stockholders  and until their  respective  successors are duly
elected and qualified. There are no family relationships among the Directors and
executive officers of the Company.

COMMITTEES AND MEETINGS OF THE BOARD

    During the fiscal year ended December 31, 1999 ("fiscal 1999"), the Board of
Directors met five times and acted by unanimous  written  consent six times.  No
incumbent  Director attended fewer than 75% of the total number of meetings held
by the Board of Directors  and  Committees of the Board of Directors on which he
served.

    The Company has a Compensation Committee and an Audit Committee but does not
have a nominating committee or other committee performing similar functions. The
Compensation  Committee makes recommendations  concerning salaries and incentive
compensation for employees of and consultants to the Company and administers the
Company's  stock option plans,  its Employee  Stock Purchase Plan and the 401(k)
Plan.  The members of the  Compensation  Committee  currently  are Messrs.  Bay,
Litwack and Marks. The Compensation  Committee held three meetings during fiscal
1999 and acted twelve times by unanimous  written  consent  during the year. The
Audit  Committee  reviews the results and scope of the audit and other  services
provided  by the  Company's  independent  accountants.  The members of the Audit
Committee  currently are Messrs.  Bay, Burns and Marks.  The Audit Committee met
four times during fiscal 1999.


                REMUNERATION OF DIRECTORS AND EXECUTIVE OFFICERS

DIRECTOR COMPENSATION

    Each non-employee  Director of the Company (an "Outside  Director") receives
$2,500 for each Board of Directors  meeting attended and $500 for each Committee
meeting  attended and is  reimbursed,  upon  request,  for expenses  incurred in
attending such meetings. Directors who are employees of the Company are not paid
any separate fees for serving as Directors.

    On February 23, 1999,  the Board  amended the  provisions  of the 1996 Stock
Option Plan (the "1996 Plan")  relating to the formula  under which  options are
granted to Outside  Directors.  Under the plan,  as  amended,  each new  Outside
Director  elected to the Board will be  automatically  granted,  upon his or her
initial election,  a fully-vested  nonqualified option to purchase 15,000 shares
of Common Stock of the Company. In addition,  immediately  following each annual
meeting of stockholders of the Company or special meeting in lieu thereof, there
is automatically  granted to each Outside Director re-elected at or remaining in
office after such meeting a fully-vested  non-qualified option to purchase 5,000
shares of Common  Stock.  Each  additional  nonqualified  option  granted  to an
Outside Director  pursuant to this provision of the 1996 Plan will expire on the
tenth  anniversary of the date of grant. The exercise of each such  nonqualified
option  will be equal to the fair market  value of the Common  Stock on the date
the nonqualified option is granted.

EXECUTIVE COMPENSATION

    SUMMARY COMPENSATION TABLE. The following table provides certain information
for the years ended  December 31, 1999,  1998 and 1997  concerning  compensation
paid to or accrued for the Company's  Chief  Executive  Officer,  the other four
most  highly  compensated  executive  officers  who were  serving  as  executive
officers of the Company on December 31, 1999 and whose total  annual  salary and
bonus for fiscal 1999 exceeded  $100,000,  and two former executive  officers of
the Company,  one being the former Chief Executive  Officer of the Company,  who
would have been among the four other most highly compensated  executive officers
but for the fact that they were no longer in office on December 31, 1999 ("named
executive officers").

                                       4
<PAGE>

                           SUMMARY COMPENSATION TABLE
<TABLE>
<CAPTION>

                                                                                  Long Term
                                              Annual Compensation (1)            Compensation
                                              -----------------------               Awards
                                                                                  Securities
                                                                                  Underlying      All Other
 Name and Principal Position                 Year       Salary($)    Bonus($)    Options(#)     Compensation($)
- ------------------------------------------   ----      ----------    ----------- ------------  ---------------
<S>                                         <C>        <C>          <C>           <C>             <C>
Robert N. Goldman .......................    1999       $210,000     $200,000      550,000              --
  Chairman of the Board of Directors,        1998        210,000           --      300,000              --
  President and Chief Executive Officer(2)   1997        200,000           --           --              --

Justin J. Perreault .....................    1999        210,000           --      450,000         330,553
  President and                              1998        168,000           --       50,000              --
  Chief Executive Officer (3)                1997        160,000           --       50,000              --

Brian W. Otis ...........................    1999        171,200       40,385      400,000              --
    Senior Vice President, Operations(4)     1998        174,004           --      120,000              --
                                             1997        140,330           --       25,000              --

Kirk D. Bowman ..........................    1999        218,080           --      150,000         175,000
    Senior Vice President, Worldwide         1998        223,242           --      100,000              --
    Sales and Services (5)                   1997        177,138           --      250,000              --

Lawrence E. Alston, Jr...................    1999        136,667       40,000      220,000              --
    Vice President,                          1998        108,000           --      130,000              --
    Marketing                                1997         95,283           --       10,000              --

Ross A. Hinchcliffe .....................    1999        279,382       20,544      450,000              --
    Vice President,                          1998             --           --           --              --
    Worldwide Sales  (6)                     1997             --           --           --              --

Satish Maripuri .........................    1999        197,088       55,000      310,000              --
    Vice President,                          1998             --           --           --              --
    Worldwide Services  (7)                  1997             --           --           --              --

</TABLE>

(1) Other annual  compensation  in the form of  perquisites  and other  personal
benefits  has been  omitted  because in each case the  aggregate  amount of such
perquisites  and other personal  benefits was less than $50,000 and  constituted
less than 10% of the executive's annual salary and bonus.

(2) Mr. Goldman was elected President and Chief Executive Officer of the Company
in  September  1999.  He has been  Chairman  of the Board of the  Company  since
January 1999. Mr. Goldman also served as President and Chief  Executive  Officer
of the Company  from the time he joined  eXcelon  Corporation  in November  1995
until January 1999.

(3) Mr. Perreault  resigned as President and Chief Executive  Officer  effective
September  30,  1999.  All other  compensation  for 1999  includes  $210,000  of
severance compensation paid upon his resignation and separation from the Company
in 1999 and $120,553  attributable  to forgiveness of a promissory note in favor
of the Company in connection with his separation from the Company.

(4) Amounts shown as salary for 1998 and 1997 include sales-based commissions of
$36,087 and $5,372, respectively.

                                       5
<PAGE>

(5) Mr.  Bowman  resigned  as an  executive  officer  of the  Company  effective
September  30,  1999.  All other  compensation  for 1999  includes  $175,000  of
severance  compensation  arising from his  resignation  and separation  from the
Company in 1999.  Mr.  Bowman's  salary for 1999 and 1998  includes  sales-based
commissions of $126,956 and $110,740, respectively. Mr. Bowman's salary for 1997
reflects  compensation  from April 21, 1997 to December 31, 1997.  Mr.  Bowman's
employment  commenced  on  November  21,  1997;  he worked for the  Company on a
contract basis from April 21, 1997 to November 21, 1997.

(6) Mr. Hinchcliffe was elected as an executive officer of the Company effective
in  September  1999.  Mr.  Hinchcliffe's  salary for 1999  includes  $153,055 of
sales-based commissions.

(7) Mr. Maripuri was elected as an executive officer of the Company effective in
September 1999. Mr.  Maripuri's  salary for 1999 includes $48,755 of sales-based
commissions.

    OPTION GRANTS IN LAST FISCAL YEAR.  The following  table sets forth for each
of the named executive  officers  certain  information  concerning stock options
granted by the Company during fiscal 1999.


                        OPTION GRANTS IN LAST FISCAL YEAR

                                Individual Grants
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                                                                   Potential Realizable
                                              Percent of                                              Value at Assumed
                             Number of      Total Options                                              Annual Rate of
                             Securities       Granted to                                                Stock Price
                             Underlying       Employees       Exercise                                  Appreciation
                              Options         In Fiscal        Price           Expiration              For Option Term
          Name               Granted (#)        Year (1)      ($/sh) (2)           Date           5% ($) (3)    10% ($) (3)
          ----              ------------       --------      ----------           ----           ----------    -----------
<S>                          <C>               <C>            <C>          <C>                   <C>          <C>
Robert N. Goldman ........    150,000(4)        2.93%          $6.44        February 25, 2009     $ 607,324    $ 1,539,077
                              400,000(5)        7.83%           2.75        September 1, 2009       691,784      1,753,117
Justin J. Perreault ......    450,000(4)        8.80%           7.13          January 8, 2009     2,016,393      5,109,937
Brian W. Otis ............     40,000(4)        0.78%           7.13          January 8, 2009       179,235        454,217
                               60,000(4)        1.17%           4.13           April 23, 2009       155,651        394,451
                              300,000(5)        5.87%           2.75        September 1, 2009       518,838      1,314,838
Kirk D. Bowman ...........    150,000(4)        2.93%           7.13          January 8, 2009       672,131      1,703,312
Lawrence E. Alston Jr.....     40,000(4)        0.78%           7.13          January 8, 2009       179,235        454,217
                               80,000(5)        1.56%           2.75        September 1, 2009       138,357        350,623
                              100,000(4)        1.96%           6.44        November 29, 2009       404,882      1,026,051
Ross A. Hinchcliffe.......     50,000(4)        0.98%           6.50        February 23, 2009       204,391        517,966
                              400,000(5)        7.83%           2.75        September 1, 2009       691,784      1,753,117
Satish Maripuri...........     10,000(4)        0.20%           6.50        February 23, 2009        40,878        103,593
                              300,000(5)        5.87%           2.75        September 1, 2009       508,838      1,314,838
</TABLE>

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

(1) The  Company  granted to  employees  options to  purchase  an  aggregate  of
5,111,050 shares of Common Stock in fiscal 1999.

(2) All  options  were  granted  at  fair  market  value  as  determined  by the
Compensation Committee on the date of grant.

(3) The dollar amounts under these columns are the result of calculations at the
5% and  10%  appreciation  rates  prescribed  by  the  Securities  and  Exchange
Commission  and,  therefore,  are  not  intended  to  forecast  possible  future
appreciation,  if  any,  in the  price  of the  Common  Stock.  Any  gain to the
optionees  results  only from an increase in the price of the Common Stock after
the date of grant, which will benefit all stockholders proportionately.

                                       6
<PAGE>

(4) Represents  shares of  Common Stock  issuable upon exercise of stock options
granted under the 1996 Plan and the  Company's  1997  Nonqualified  Stock Option
Plan (the "1997 Plan"). Such options were granted during fiscal 1999 and vest as
follows:  25% of the total  number of shares one year after  their date of grant
and an additional 6.25% at the end of each three-month  period  thereafter until
the options are fully vested.

(5) Represents  shares of  Common Stock  issuable upon exercise of stock options
granted  under the 1996 Plan and 1997 Plan.  Such options  were  granted  during
fiscal 1999 and vest as follows: 25% of the total number of shares at the end of
each three-month period until the options are fully vested.

     OPTION EXERCISES AND FISCAL YEAR-END VALUES. The following table sets forth
certain  information  concerning stock options  exercised during fiscal 1999 and
stock  options  held as of  December  31,  1999 by each of the  named  executive
officers.

                 AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR
                        AND FISCAL YEAR-END OPTION VALUES
<TABLE>
<CAPTION>
                                                                 Number of Securities               Value of Unexercised
                                 Shares                        Underlying Unexercisable                in-the- Money
                                Acquired                              Options At                    Options at Fiscal
                                   On           Value              Fiscal  Year-End                  Year-End ($) (2)
             Name             Exercise(#)   Realized($)(1)   Exercisable (#) Unexercisable (#) Exercisable ($) Unexercisable ($)
             ----             -----------   --------------   --------------- ----------------- --------------- -----------------
<S>                               <C>          <C>             <C>               <C>          <C>
Robert N. Goldman .............        --            --         212,501           637,499      $2,118,977         $6,307,573
Justin J. Perreault ...........        --            --              --                --              --                 --
Brian W. Otis .................    11,249        31,082         241,647           426,186       2,762,173          4,441,939
Kirk D. Bowman ................     8,500       $ 2,125              --                --              --                 --
Lawrence E. Alston, Jr.........    23,778       182,742          64,478           292,597         517,430          2,566,684
Ross A. Hinchcliffe ...........        --            --         112,000           387,500       1,307,025          4,321,075
Satish Maripuri................     5,350        54,708         113,345           274,105       1,300,944          3,127,725

</TABLE>

(1) Value is based on the difference between the fair market value of the Common
Stock on the date of exercise of the applicable option and the exercise price of
such option.  These values may never be realized.  Actual  gains,  if any,  will
depend on the value of the Common Stock on the date of the sale of the shares.

(2) Value is based on the last sale price of the Common Stock ($14.50 per share)
on  December  31,  1999 as  reported  by the Nasdaq  National  Market,  less the
applicable  option exercise  price.  These values have not been and may never be
realized.  Actual  gains,  if any, on  exercise  will depend on the value of the
Common Stock on the date of the sale of the shares.

EMPLOYMENT AGREEMENTS

    In November 1995, the Company executed employment  agreements with Robert N.
Goldman and Justin J. Perreault (the "1995 Employment Agreements").  The Company
agreed to employ Messrs.  Goldman and Perreault as President and Chief Executive
Officer of the Company and Executive Vice President and Chief Operating  Officer
of the  Company  respectively,  at  annual  salaries  of at least  $190,000  and
$160,000 respectively.  Under these agreements, if the employment of the officer
was  terminated  by the Company for any reason  other than just cause,  death or
permanent disability, the agreements required the Company to continue to pay the
officer's salary for a period of twelve months, in the case of Mr. Goldman,  and
six months in the case of Mr. Perreault,  after such termination,  offset by any
amounts received by the officer from subsequent employment during such period.

                                       7
<PAGE>

    In November 1998, the 1995 Employment  Agreements for Messrs.  Perreault and
Goldman were amended.  The agreement  entered into with Mr. Goldman provided for
his salary for twelve  months and 100% of on target  bonus for the year in which
such  termination  occurs to be paid by the Company in the event of  termination
for any reason  other than  "cause"  as defined in the  agreement.  Furthermore,
under the  agreement,  and only in the event of a "change of control" as defined
in the agreement, the Company would pay Mr. Goldman twenty-four months of salary
and 100% of target bonus for the year in which such termination  occurs, and any
outstanding  options held by Mr. Goldman would become fully vested.  The Company
entered into a similar agreement with Mr. Perreault in November 1998 except that
in the event of termination  for reasons other than "cause" he would receive six
months salary and 100% of on target bonus for the year in which such termination
occurs, and in the event of a "change in control" he would receive twelve months
salary  and 100% of on  target  bonus  for the year in  which  such  termination
occurs,  and any  outstanding  options held by Mr.  Perreault would become fully
vested.

    The Company also entered into agreements with Messrs.  Bowman, Alston, Otis,
Hinchcliffe  and Maripuri which provide,  in the event of a "change in control",
for  payment of twelve  months  salary and 100% of target  bonus for the year in
which such termination  occurs, and full vesting of any outstanding options held
by such  individuals.  In February 1999, Mr. Goldman's  agreement was amended to
reflect the fact that he had  relinquished  his position as President  and Chief
Executive  Officer of the  Company,  retaining  his  position as Chairman of the
Board of  Directors  of the  Company.  Also in February  1999,  Mr.  Perreault's
agreement  was amended to reflect his promotion to the position of President and
Chief Executive Officer of the Company, and his agreement was amended to reflect
that twelve months salary would be paid in the event of termination  for reasons
other than "cause" and twenty-four months salary would be paid by the Company in
the event of a "change in control".  Mr.  Perreault  resigned as  President  and
Chief  Executive  Officer  effective  September 30, 1999. In September 1999, Mr.
Goldman's agreement was amended to reflect his resumption of office as President
and Chief  Executive  Officer of the  Company,  in addition  to his  position as
Chairman of the Board of Directors of the Company.

    As a result of Mr.  Perreault's  resignation  from the Company Mr. Perreault
was provided with $210,000 of severance  compensation  paid upon his resignation
and separation  from the Company and forgiveness of obligations in the amount of
$120,553 under a promissory note in favor of the Company. Mr. Bowman resigned as
an executive  officer of the Company  effective  September 30, 1999 and received
$175,000 of severance compensation.

    In connection with their  employment,  these officers executed the Company's
standard   Non-Competition,   Non-Disclosure  and  Developments  Agreement  (the
"Non-Competition Agreement"). These agreements contain covenants prohibiting the
improper  disclosure  of  confidential  information  at any  time,  as  well  as
provisions  assigning  to the Company all  inventions  made or  conceived by the
officer  during his  employment  with the Company.  Each officer agreed with the
Company that, with certain  exceptions,  until one year after the termination of
his employment with the Company, he would not participate in any capacity in any
business activities  competitive with those of the Company. Each officer further
agreed not to  participate  in any  capacity in  soliciting  the business of any
customers or the services of any  employees of the Company  during such one-year
period.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     The Compensation  Committee (the  "Committee")  established by the Board of
Directors  is  currently  composed of three  non-employee  Directors;  Arthur J.
Marks,  Gerald  B. Bay and David A.  Litwack.  Except  as set  forth  below,  no
executive officer of the Company served during 1999 on the Board of Directors or
compensation  committee  of any entity,  one of whose  executive  officers  also
served on the Board of  Directors  or  Compensation  Committee  of the  Company.
During 1999, Mr.  Goldman,  the Company's  Chairman of the Board,  President and
Chief  Executive  Officer,   served  as  a  Director  of  Parametric  Technology
Corporation, of which Steven C. Walske, a Director of the Company until February
23, 1999, is Chairman of the Board and Chief Executive Officer. Mr. Goldman also
served  as a member  of the  compensation  committee  of  Parametric  Technology
Corporation during 1999.

                                       8
<PAGE>

COMPENSATION COMMITTEE REPORT ON EXECUTIVE COMPENSATION

    The  Compensation  Committee  of  the  Board  of  Directors  determines  the
remuneration and benefits of the Company's  executive  officers and other senior
management,  administers  the  Company's  stock option plans and Employee  Stock
Purchase  Plan and makes  determinations  with  respect to the granting of stock
options,  and acts in an advisory capacity to the Board of Directors  concerning
other compensation issues.

COMPENSATION POLICY

    The  Compensation  Committee's  policy with respect to  compensation  of the
Company's Chief Executive Officer and other executive  officers includes several
elements:  (i) the payment of  competitive  base  salaries to attract and retain
highly qualified personnel,  (ii) the use of incentive  compensation in the form
of cash bonuses to reward the achievement of Company  financial  objectives such
as  achievement  of  budgeted  expense  and  profitability  levels,  as  well as
technical and market  development  goals,  (iii) in appropriate  instances,  the
payment of sales-based  commissions to reward  contributions  to revenue growth,
(iv) the  granting  of stock  options to  maintain  competitive  levels of total
compensation  to assist the Company in recruiting  and retaining  personnel,  as
well as to  align  management's  interests  with  those of  shareholders  and to
motivate executives to pursue the long-term success of the Company,  and (v) the
implementation  and  execution of  executive  employment  agreements  containing
provisions  intended  to attract  and retain  highly  qualified  personnel.  The
Committee  intends  that  the  Company's  executive   compensation  policies  be
straightforward,   easily  communicated  to  and  understood  by  employees  and
shareholders,  and structured so that the  achievement of Company and individual
goals can be readily measured.

BASE SALARIES

    Competitive  base  salaries  are  established  through the use of  published
industry surveys and targeted peer company surveys that examine the compensation
practices of other  companies in the software  industry as well as of other high
technology companies in the relevant geographic area that might compete with the
Company in hiring or retaining strong performers.  The Committee,  utilizing the
collected data and applying the members' collective experience in recruiting and
managing in a technical environment,  seeks to establish base salaries that take
into account not only competitive factors but also the breadth of experience and
recent individual performance of the executive. The Committee's objective is not
to  determine  compensation  levels,  in general or for specific  positions,  by
seeking to achieve a specific  percentile  rank in comparison to  competitors or
peers, but rather to fix compensation  levels on a case-by-case  basis guided by
management's recommendations and the Committee members' experience and judgment.
In 1999, as in 1998, the Company's President and Chief Executive Officer, Robert
N. Goldman was paid a base salary of $210,000.

INCENTIVE COMPENSATION

    In establishing executive bonus levels, the Compensation Committee begins by
reviewing  management's  annual strategic and financial plan, as approved by the
Board of Directors at the  beginning of the year,  including  Company  financial
goals and individual performance goals proposed by the Company's Chief Executive
Officer.  The  bonus  for  which an  executive  officer  (other  than the  Chief
Executive Officer) is eligible is established at this time, and is a percentage,
generally  ranging from 0% to 50%, of his annual base salary.  The percentage of
this amount,  if any, awarded as a bonus at the end of the year is determined by
reference  to both the  Company's  and the  executive's  performance.  The Chief
Executive Officer's bonus is determined based on the attainment of goals jointly
developed and agreed upon between the Chief Executive  Officer and the Committee
and is not fixed as a  specific  percentage  of his or her base  salary.  At the
beginning of the year, the Chief Executive  Officer presents to the Committee an
analysis of the  performance  of the individual  executives  against the overall
corporate   financial  goals  and  their  personal  goals,   together  with  his
recommendations  concerning specific  management bonuses.  After reviewing these
recommendations, the Committee determines whether, and in what amounts, to award
bonuses for the Chief Executive Officer and other executive officers.  For 1999,
Mr.  Goldman  received cash bonuses  equaling  $200,000;  Mr. Otis received cash
bonuses  equaling  $40,385;  Mr.  Hinchcliffe  received  cash  bonuses  equaling
$20,544;  Mr.  Maripuri  received  cash bonuses  equaling  $55,000;  Mr.  Alston
received  cash  bonuses  equaling  $40,000;  and  Messrs.  Perreault  and Bowman
received no cash bonuses.
                                       9
<PAGE>

STOCK OPTIONS

    The  Compensation  Committee  believes  that  stock  option  grants  are  an
important element of the Company's executive  compensation  program, not only to
enable the Company to compete  effectively in recruiting and retaining employees
but also in order  to  align  the  interests  of  management  with  those of the
Company's  stockholders.  In granting options,  the Committee  considers,  among
other   factors,    competitive   conditions,    the   executive's   experience,
responsibilities  and performance,  the sizes of other individual grants and the
total number of options outstanding.  Option grants are awarded to all executive
officers  at the time they are  hired,  and  additional  options  may be granted
thereafter based upon specific individual or corporate achievements.

    For fiscal year 1999, Mr. Goldman was granted 150,000 options at an exercise
price of $6.44 and 400,000  options at an exercise price of $2.75;  Mr. Otis was
granted  40,000  options at an  exercise  price of $7.13,  60,000  options at an
exercise price of $4.13 and 300,000  options at an exercise price of $2.75;  Mr.
Hinchcliffe was granted 50,000 options at an exercise price of $6.50 and 400,000
options at an exercise price of $2.75;  Mr.  Maripuri was granted 10,000 options
at an exercise price of $6.50 and 300,000 options at an exercise price of $2.75;
and Mr. Alston was granted 40,000 options at an exercise price of $7.13,  80,000
options at an exercise  price of $2.75 and 100,000  options at an exercise price
of $6.44.

POLICY REGARDING  SECTION 162(M) OF THE INTERNAL REVENUE CODE

    Section 162(m) of the Internal Revenue Code of 1986, as amended,  limits the
deductibility  of  compensation  in  excess  of $1.0  million  paid to the Chief
Executive Officer and the four most highly  compensated  officers of the Company
(other  than the  Chief  Executive  Officer)  in any  fiscal  year,  unless  the
compensation  qualifies as  "performance-based  compensation."  The Compensation
Committee's  policy with respect of Section  162(m) is to make every  reasonable
effort  to  cause   compensation   to  be   deductible   by  the  Company  while
simultaneously  providing  executive  officers of the Company  with  appropriate
rewards for their  performance.  The base  salaries and bonuses of the Company's
individual executive officers have not historically exceeded, and are not in the
foreseeable  future  expected to exceed,  the $1.0  million  limit,  and options
received by executive  officers  under the Company's 1996 Plan and 1997 Plan are
intended to qualify as performance-based compensation.

                                                     The Compensation Committee

                                                     Gerald B. Bay
                                                     David A. Litwack
                                                     Arthur J. Marks

                                       10
<PAGE>

PERFORMANCE GRAPH

     The following  Performance  Graph compares the performance of the Company's
cumulative  stockholder  return with that of a broad  market  index,  the Nasdaq
Stock Market  Index for U.S.  Companies,  and a published  industry  index,  the
Hambrecht & Quist  Technology  Index.  The  cumulative  stockholder  returns for
shares of the  Company's  Common  Stock and for the  securities  included in the
market and industry  indexes are calculated  assuming $100 was invested at their
last sale prices on July 23, 1996, the date on which the Company's  Common Stock
commenced  trading on the  Nasdaq  National  Market.  The  Company  paid no cash
dividends  during the periods shown.  The performance of the market and industry
indexes is shown on a total return (dividends reinvested) basis.


        COMPARISON OF CUMULATIVE TOTAL RETURN IN TWELVE MONTH INTERVALS*
         AMONG EXCELON CORPORATION, THE NASDAQ STOCK MARKET (U.S.) INDEX
                   AND THE HAMBRECHT & QUIST TECHNOLOGY INDEX



                             7/23/96   12/31/96   12/31/97   12/31/98   12/31/99
                             -------   --------   --------   --------   --------
eXcelon Corporation              100     156.67     111.67      88.33     193.33
Hambrech & Quist Technology      100     136.73      160.3     249.34     556.85
NASDAQ U.S.                      100      123.1     151.02      212.3     393.94






*$100  INVESTED  ON  7/23/96  IN  STOCK  OR INDEX -  INCLUDING  REINVESTMENT  OF
DIVIDENDS. FISCAL YEAR ENDING DECEMBER 31.



                                       11
<PAGE>

                                  PROPOSAL TWO
               AMENDMENT TO THE 1996 EMPLOYEE STOCK PURCHASE PLAN
                       TO INCREASE THE NUMBER OF SHARES OF
                   COMMON STOCK AVAILABLE FOR GRANT THEREUNDER

The Company's  1996 Employee  Stock  Purchase Plan (the "Stock  Purchase  Plan")
provides  that the total number of shares of Common Stock that are available for
grant thereunder shall not exceed 500,000. On February 29, 2000, the Board voted
to adopt,  and to submit to the  stockholders of the Company for their approval,
an  amendment  to the Stock  Purchase  Plan to increase by 200,000 the number of
shares of Common Stock  available  under the Stock Purchase Plan,  such that the
total number of shares of Common Stock  available  under the Stock Purchase Plan
be 700,000.  See "1996  Employee  Stock  Purchase Plan" for a description of the
material features of the Stock Purchase Plan, as amended, the classes of persons
eligible  to  participate  therein,  the  basis of such  participation,  and the
reasons for the amendment.

    THE BOARD RECOMMENDS THAT YOU VOTE FOR THE PROPOSAL TO APPROVE THE AMENDMENT
OF THE EMPLOYEE STOCK PURCHASE PLAN

                        1996 EMPLOYEE STOCK PURCHASE PLAN

    In 1996,  the Board of Directors  adopted,  and the  Company's  stockholders
approved, the 1996 Employee Stock Purchase Plan (the "Stock Purchase Plan"). The
Stock Purchase Plan is intended to qualify as an "employee  stock purchase plan"
under Section 423 of the Internal Revenue Code of 1986, as amended (the "Code"),
and as such, to provide a method  whereby  employees of the Company will have an
opportunity  to acquire an, or increase an existing,  ownership  interest in the
Company through the purchase of shares of the Common Stock of the Company.

     The  Stock  Purchase  Plan,  as  initially  adopted  and  approved  by  the
stockholders of the Company on May 23, 1996,  fixed the maximum number of shares
of Common Stock of the Company  available for issuance and purchase by employees
under the Stock  Purchase  Plan at 300,000.  On February 23, 1998,  the Board of
Directors  voted to adopt,  and the  stockholders  of the  Company  subsequently
approved,  an  amendment to the Stock  Purchase  Plan to increase by 200,000 the
number of shares of Common Stock  available  under the Stock Purchase Plan, such
that the  total  number of shares  of  Common  Stock  available  under the Stock
Purchase  Plan,  as so amended,  was  500,000.  On April 5, 2000,  the number of
shares of Common Stock  remaining  available for issuance and purchase under the
Stock Purchase Plan was only 132,748.

AMENDMENT OF THE 1996 EMPLOYEE STOCK PURCHASE PLAN

    On February 29, 2000, the Board of Directors  voted to adopt,  and to submit
to the stockholders of the Company for their approval, an amendment to the Stock
Purchase  Plan to  increase  by  200,000  the  number of shares of Common  Stock
available under the Stock Purchase Plan, such that the total number of shares of
Common Stock available under the Stock Purchase Plan would be 700,000.

     The Company  believes that the  availability  of an employee stock purchase
plan is  important  to the  Company's  ability to recruit  and retain  qualified
employees,  as well as provide  employees with the opportunity to increase their
respective ownership interest in the Company.  Currently, only 132,748 shares of
Common Stock are available for purchase and issuance  under the Company's  Stock
Purchase  Plan. If the total number of shares for which options are exercised on
any offering termination date exceeds the number of shares that remain available
for  issuance  and  purchase by employees  under the Stock  Purchase  Plan,  the
Company must make a pro rata allocation of the shares available for delivery and
distribution in an equitable manner, and return to each participant of the Stock
Purchase Plan any balance of payroll deductions  credited to the account of each
such  participant.  In 1999 and 1998,  the  Company  issued  157,267 and 104,835
shares of Common Stock under the Stock Purchase Plan, respectively.  Without the
proposed amendment, the number of shares available under the Stock Purchase Plan
is likely  to be  exhausted  during  the  coming  year.  The Board of  Directors
believes  that  in  the  current  competitive   environment  for  highly-skilled
employees,  the  amendment  of the Stock  Purchase  Plan to increase the maximum

                                       12
<PAGE>

number of shares  issuable  thereunder by 200,000  shares is necessary to enable
the Company to provide appropriate  long-term incentives to its employees and to
recruit and retain additional highly-skilled employees to support the growth of
the Company's business.

    THE BOARD OF DIRECTORS  THEREFORE  RECOMMENDS THAT STOCKHOLDERS VOTE FOR THE
PROPOSED AMENDMENT TO THE STOCK PURCHASE PLAN.

DESCRIPTION OF THE 1996 EMPLOYEE STOCK PURCHASE PLAN

    The Stock Purchase Plan is administered by the Compensation Committee of the
Board of Directors (the "Plan Administrator").  Under the Stock Purchase Plan up
to 500,000  shares of the Company's  Common Stock may be purchased at 85% of the
lower of the fair market value of the stock on the first or the last day of each
six-month  offering  period.  Employees may elect to have up to 6% of their base
pay withheld and applied toward the purchase of shares in each offering, up to a
maximum of $25,000 withheld in any year.

    Participation   in  the  Stock   Purchase  Plan  is  completely   voluntary.
Participation  in any one or more of the offerings under the Stock Purchase Plan
shall neither limit,  nor require,  participation  in any other  offering.  Each
employee of the Company  whose  service  with the Company  commences on or after
November 1, 1996 is eligible to  participate  in the Stock  Purchase Plan on the
first  offering  commencement  date,  following the  completion of six months of
continuous service with the Company.  Each employee of the Company whose service
with the Company  commenced prior to November 1, 1996 is eligible to participate
in the Stock Purchase Plan on the first offering commencement date following the
commencement of service with the Company. As of April 5, 2000, approximately 328
employees of the Company and its  subsidiaries  were eligible to  participate in
the Stock Purchase Plan.

    Notwithstanding  the foregoing,  no employee will be granted an option under
the Plan: (i) if,  immediately  after the grant,  such employee would own stock,
and/or hold outstanding options to purchase stock,  possessing 5% or more of the
total  combined  voting power or value of all classes of stock of the Company or
any  subsidiary of the Company,  as determined  pursuant to the rules of Section
424(d) of the Code,  or (ii) which  permits  such  employees  rights to purchase
stock under all Section 423 employee stock purchase plans of the Company and its
subsidiaries to exceed $25,000 of the fair market value of the stock (determined
at the time such option is granted) for each  calendar year in which such option
is outstanding,  as determined pursuant to the rules of Section 423(b)(8) of the
Code.

    Any  eligible  employee  may become a  participant  by  completing a payroll
deduction  authorization  form  provided  by the  Company and filing it with the
Company's Treasurer 20 days prior to each applicable offering commencement date,
as determined by the Compensation  Committee. At the time a participant files an
authorization  for a payroll  deduction,  the  participant  shall  elect to have
deductions  made from his or her pay on each payday during any offering in which
he or she is a participant, at a specified percentage of his or her Compensation
as determined on the applicable  offering  commencement  date.  Each  employee's
specified  percentage  must  be in  increments  of 1% but in no  event  can  any
employee's  specified  percentage  exceed a maximum  percentage  of 6%.  Payroll
deductions for a participant  shall commence on the offering  commencement  date
when the applicable  authorization for a payroll deduction becomes effective and
shall  end on the  offering  termination  date of the  offering  to  which  such
authorization is applicable,  unless sooner  terminated by the participant.  All
payroll  deductions  made  for a  participant  shall be  credited  to his or her
account under the Stock Purchase  Plan. A participant  may not make any separate
cash payment  into such  account.  A  participant  may  withdraw  from the Stock
Purchase Plan at any time during the  applicable  offering  period.  No interest
will be paid or  allowed  on any  money  paid into the Plan or  credited  to the
account of any participating employee.

    Prior to the offering termination date for an offering,  any participant may
withdraw the payroll  deductions  credited to his or her account under the Stock
Purchase Plan for such offering by giving written notice to the Treasurer of the
Company.  All of the participant's  payroll deductions  credited to such account

                                       13
<PAGE>

will be paid to the participant  promptly after receipt of notice of withdrawal,
without interest,  and no future payroll deductions will be made from his or her
pay during  such  offering.  The  Company  will treat any attempt to borrow by a
participant on the security of accumulated  payroll deductions as an election to
withdraw such  deductions.  A  participant's  election not to participate in, or
withdrawal  from,  any  offering  will  not  have  any  effect  upon  his or her
eligibility to  participate  in any  succeeding  offering or in any similar plan
which  may  hereafter  be  adopted  by  the  Company.  Upon  termination  of the
participant's  employment  for any reason,  including  retirement  but excluding
death, the payroll deductions credited to his or her account will be returned to
the  participant,  or, in the case of his or her death, to the person or persons
entitled thereto.  Upon termination of the participant's  employment  because of
death,  his or her beneficiary  shall have the right to elect, by written notice
given to the Company's  Treasurer prior to the expiration of a period of 90 days
commencing  with  the  date of the  death  of the  participant,  either:  (i) to
withdraw all of the payroll  deductions  credited to the  participant's  account
under the Stock Purchase Plan; or (ii) to exercise the participant's  option for
the purchase of stock on the offering  termination  date next following the date
of the  participant's  death for the purchase of the number of full shares which
the accumulated  payroll deductions in the participant's  account at the date of
the  participant's  death will purchase at the applicable  option price, and any
excess in such account will be returned to said  beneficiary.  In the event that
no such written  notice of election  shall be duly received by the office of the
Company's  Treasurer,  the  beneficiary  shall  automatically  be deemed to have
elected to withdraw the payroll deductions credited to the participant's account
at the date of the  participant's  death and the same will be paid  promptly  to
said beneficiary.

    On the offering commencement date of each offering, a participating employee
shall be deemed to have been  granted an option to purchase a maximum  number of
shares of the Common Stock equal to an amount determined as follows:  (i) 85% of
the  market  value  per share of the  Common  Stock on the  applicable  offering
commencement  date shall be divided  into an amount  equal to the sum of (x) the
percentage of the  employee's  compensation  which he or she has elected to have
withheld  (multiplied by the employee's  compensation  over the offering period)
plus (y) any amounts in the employee's account on the offering commencement date
that have been carried  forward  from prior  offerings;  multiplied  by two. The
option price of the Common Stock  purchased with payroll  deductions made during
each such offering for a  participant  therein shall be the lower of: (i) 85% of
the  average of the bid and the asked  prices as  reported by Nasdaq in the Wall
Street  Journal,  or, if the Common  Stock is  designated  as a National  Market
Security by Nasdaq,  the last  trading  price of the Common Stock as reported by
the Nasdaq National Market System in the Wall Street Journal,  or, if the Common
Stock is listed on an  exchange,  the closing  price of the Common  Stock on the
exchange on the offering  commencement  date  applicable to such offering (or on
the next  regular  business  date on which  shares of the Common  Stock shall be
traded,  in the event that no shares of the Common Stock have been traded on the
offering commencement date); or if the Common Stock is not quoted on Nasdaq, not
designated as a Nasdaq  national  market security and not listed on an exchange,
85% of the fair market value on the offering  commencement date as determined by
the Compensation Committee; and (ii) 85% of the average of the bid and the asked
prices as reported by Nasdaq in the Wall Street Journal, or, if the Common Stock
is designated as a national  market security by the NASD, the last trading price
of the Common Stock as reported by the Nasdaq National Market System in the Wall
Street  Journal,  or, if the Common Stock is listed on an exchange,  the closing
price of the Common  Stock on the  exchange  on the  Offering  Termination  Date
applicable  to such  Offering  (or on the next  regular  business  date on which
shares of the Common  Stock shall be traded,  in the event that no shares of the
Common Stock shall have been traded on the offering termination date); or if the
Common Stock is not quoted on Nasdaq, not designated as a Nasdaq national market
security  and not listed on an  exchange,  85% of the fair  market  value on the
offering termination date as determined by the Committee. The last sale price of
the Common Stock on April 14, 2000 as reported by the Nasdaq National Market was
$8.125.

     Unless a participant  gives written notice to the Treasurer of the Company,
his or her option for the purchase of Common Stock with payroll  deductions made
during any offering will be deemed to have been exercised  automatically  on the
offering  termination  date  applicable to such offering for the purchase of the
number of full shares of Common Stock which the accumulated  payroll  deductions
in his or her account at that time (plus any amounts in his or her account  that
have been carried forward from prior  offerings) will purchase at the applicable
option  price,  and  any  excess  in  his/her  account  at  that  time  will  be
automatically  carried  forward  to the next  offering  unless  the  participant
elects,  by written  notice to the Treasurer of the Company,  to have the excess
returned to the participant.  The participant will have no interest in the stock
covered by his or her option until such option has been exercised.

                                       14
<PAGE>

FEDERAL INCOME TAX CONSEQUENCES TO THE COMPANY AND THE PARTICIPANTS

     If an  employee  acquires  shares of  Common  Stock  pursuant  to the Stock
Purchase  Plan  and  does  not  dispose  of them  within  two  years  after  the
commencement  of the offering  pursuant to which the shares were  acquired,  nor
within  one year  after the date on which the  shares  were  acquired,  any gain
realized  upon  subsequent  disposition  will be taxable as a long-term  capital
gain, except that the portion of such gain equal to the lessor of (a) the excess
of the fair  market  value of the  shares  on the date of  disposition  over the
amount paid upon  purchase  of the shares,  or (b) the excess of the fair market
value of the shares on the offering  Commencement Date over the amount paid upon
purchase of the shares, is taxable as ordinary income. There is no corresponding
deduction for the Company,  however. If the employee disposes of the shares at a
price less than the price at which he or she acquired  the shares,  the employee
realizes no ordinary  income and has a long-term  capital  loss  measured by the
difference between the purchase price and the selling price.

     If an employee  disposes of shares acquired  pursuant to the Stock Purchase
Plan  within two years  after the  offering  commencement  date of the  offering
pursuant to which the shares were acquired, or within one year after the date on
which the shares were acquired,  the  difference  between the purchase price and
the fair market  value of the shares at the time of purchase  will be taxable to
him or her as ordinary  income in the year of  disposition.  In this event,  the
Company may deduct from its gross income an amount  equal to the amount  treated
as ordinary  income to each such employee.  Any excess of the selling price over
the fair  market  value at the time the  employee  purchased  the shares will be
taxable as long-term or short-term  capital gain,  depending upon the period for
which the shares  were held.  If any shares are  disposed  of within  either the
two-year  or one-year  period at a price less than the fair market  value at the
time of  purchase,  the same amount of ordinary  income  (i.e.,  the  difference
between the  purchase  price and the fair market value of the shares at the time
of  purchase)  is  realized,  and a  capital  loss is  recognized  equal  to the
difference  between the fair market  value of the shares at the time of purchase
and the selling price.

     If a  participating  employee should die while owning shares acquired under
the Stock Purchase Plan,  ordinary  income may be reportable on his or her final
income tax return.

     Although  the  foregoing  summarizes  the  essential  features of the Stock
Purchase  Plan, it is qualified in its entirety by reference to the full text of
the Stock Purchase Plan as amended, which is attached as Exhibit I to this proxy
statement.

REGISTRATION OF SHARES AVAILABLE UNDER THE 1996 EMPLOYEE STOCK PURCHASE PLAN

     The  Company  has  filed  registration  statements  on Form S-8  under  the
Securities  Act of 1933 to register the 500,000  shares of the Company's  Common
Stock that are currently  reserved for issuance  under the 1996  Employee  Stock
Purchase Plan. If the proposed  amendment is approved by the  stockholders,  the
Company  intends to file, as soon as  practicable,  a registration  statement on
Form S-8 under the Securities Act of 1933 covering the additional 200,000 shares
of Common Stock that will be issuable  under the 1996  Employee  Stock  Purchase
Plan, as amended.  The Board of Directors has not determined what action it will
take in the event that the stockholders do not approve the proposal.

NEW PLAN BENEFITS

     The Company is unable to determine the dollar value and number of shares of
Common Stock that will be issued under the 1996 Employee  Stock Purchase Plan if
the amendment described herein is approved to (i) any of the executive officers,
(ii) the current executive  officers as a group, (iii) the current Directors who
are not executive  officers as a group,  (iv) each nominee for the election as a
Director and (v) the  employees who are not  executive  officers as a group.  No
additional  benefits or amounts  would have been received by or allocated to any
such  persons or groups for fiscal  1999 if the  amendment  to the 1996 Plan had
been in effect throughout such year.

                                       15
<PAGE>

                                 PROPOSAL THREE
             AMENDMENT TO THE 1996 INCENTIVE AND NONQUALIFIED STOCK
                 OPTION PLAN TO INCREASE THE NUMBER OF SHARES OF
            COMMON STOCK THAT MAY BE ISSUED UPON EXERCISE OF OPTIONS
                               GRANTED THEREUNDER

     The Company's 1996 Incentive and Nonqualified  Stock Option Plan (the "1996
Stock  Option  Plan")  provides  that the total number of shares of Common Stock
that may be issued  pursuant to options granted under the 1996 Stock Option Plan
shall not exceed  3,700,000  (subject  to  adjustment  upon  certain  changes in
capitalization of the Company).  On February 29, 2000, the Board voted to adopt,
and submit to the  stockholders of the Company for their approval,  an amendment
to the 1996 Stock  Option  Plan to increase  by  1,000,000  shares the number of
shares  of  Common  Stock  that  may  be  issued  pursuant  to  options  granted
thereunder.  See "1996 Stock  Option  Plan" for a  description  of the  material
features  of the 1996 Stock  Option  Plan,  as  amended,  the classes of persons
eligible to participate  therein, the approximate number of persons in each such
class and the basis of such participation, and the reasons for the amendment.

    THE BOARD RECOMMENDS THAT YOU VOTE FOR THE PROPOSAL TO APPROVE THE AMENDMENT
OF THE 1996 STOCK OPTION PLAN.

                             1996 STOCK OPTION PLAN

     In 1996 the Board adopted and the Company's  stockholders approved the 1996
Stock  Option  Plan.  The 1996 Stock  Option  Plan  authorizes  (i) the grant of
options to  purchase  Common  Stock  intended  to qualify  as  "incentive  stock
options"  as defined in Section  422 of the Code,  and (ii) the grant of options
that do not so qualify  (nonqualified  stock  options).  The purpose of the 1996
Stock  Option  Plan is to  provide a  performance  incentive  for  officers  and
employees of the Company or its subsidiaries  and for certain other  individuals
providing  services to or acting as Directors of the Company or its subsidiaries
by  enabling  the  persons to whom  options are granted to acquire or increase a
proprietary interest in the Company and its success.

     The 1996 Stock  Option  Plan,  as  initially  adopted  and  approved by the
stockholders  of the Company on May 23, 1996 (the  "Adoption  Date"),  fixed the
maximum  number of shares of Common Stock issuable  pursuant to options  granted
thereunder at 1,200,000,  increasing  automatically by 300,000 shares on each of
the first five  anniversaries  of the Adoption Date, with the result that on and
after May 23, 2001, the maximum  number of shares  issuable under the 1996 Stock
Plan would have been  2,700,000.  On April 2, 1998, the Board of Directors voted
to  adopt,  and  the  stockholders  of the  Company  subsequently  approved,  an
amendment  to the 1996 Stock Option Plan,  increasing  by 1,000,000  the maximum
number of shares of Common Stock issuable pursuant to options issued thereunder,
such that the maximum number of shares issuable as of May 27, 1998 was 2,800,000
rather than  1,800,000  as  originally  provided in the 1996 Stock  Option Plan.
Thereafter, on each of the third, fourth and fifth anniversaries of the Adoption
Date, the maximum number of shares of Common Stock issuable under the 1996 Stock
Option Plan has been or will be, as the case may be, automatically  increased by
300,000 shares,  as originally  contemplated by the 1996 Stock Option Plan, to a
maximum,  on and after May 23, 2001, of 3,700,000  shares. On April 5, 2000, the
maximum  number of shares of Common Stock  issuable  under the 1996 Stock Option
Plan  pursuant to this formula was 3,100,000  shares,  an aggregate of 2,840,550
shares of Common Stock were  reserved for issuance  upon the exercise of options
outstanding under the 1996 Stock Option Plan, and 183,816 shares had been issued
pursuant to the exercise of options thereunder.  As a result, only 75,634 shares
remained  available for the grant of options under the 1996 Stock Option Plan as
of such date.

     On April 22, 1997,  the Board of Directors  adopted the 1997 Plan. The 1997
Plan  provides for the grant to employees of the Company of  nonqualified  stock
options to purchase an  aggregate  of up to  5,500,000  shares of Common  Stock.
Approval of the 1997 Plan by the  stockholders  of the Company was not required.
Since the adoption of the 1997 Plan, the policy of the Compensation Committee of
the Board has been to utilize  the 1996 Stock  Option  Plan  primarily  to grant
incentive  and  nonqualified  stock  options  to  officers  of the  Company.  In
addition,  automatic  formula  grants of  nonqualified  stock options to Outside
Directors are made pursuant to the 1996 Stock Option Plan.

                                       16
<PAGE>
AMENDMENT OF THE 1996 STOCK OPTION PLAN

     On February 29, 2000, the Board of Directors voted to adopt,  and to submit
for  approval  by the  stockholders  of the  Company at the Annual  Meeting,  an
amendment  to the 1996 Stock Option Plan,  increasing  by 1,000,000  the maximum
number of shares of Common Stock issuable pursuant to options issued thereunder.
If approved at the Annual Meeting, the additional 1,000,000 shares will be added
to the maximum number issuable on or after May 23, 2000 (the fourth  anniversary
of the  adoption  date of the 1996 Stock  Option  Plan),  such that the  maximum
number of shares issuable as of the date of the Annual Meeting will be 4,400,000
rather than  3,400,000  as  currently  provided in the 1996 Stock  Option  Plan.
Thereafter, on the fifth anniversary of the Adoption Date, the maximum number of
shares  of  Common  Stock  issuable  under  the  1996  Stock  Option  Plan  will
automatically be increased by 300,000 shares, as originally  contemplated by the
1996 Stock Option Plan,  to a maximum,  on and after May 23, 2001,  of 4,700,000
shares.

     As stated above, long-term,  equity-based compensation in the form of stock
options is a key element of the  Company's  executive  compensation  policy.  In
addition,  the Company believes that the availability of incentive stock options
is  important  to  the  Company's   ability  to  recruit  and  retain  qualified
executives.  Currently, only 75,634 shares of Common Stock are available for the
grant of options to  officers  of the  Company  under the  Company's  1996 Stock
Option Plan. This number will increase to 375,634 on May 23, 2000 as a result of
the automatic  annual  increase  provided for in the 1996 Stock Option Plan and,
without the proposed amendment, would not increase again until May 23, 2001. The
Board of Directors  believes  that in the current  competitive  environment  for
senior  executives  the  amendment of the 1996 Stock Option Plan to increase the
maximum number of shares issuable thereunder by 1,000,000 shares is necessary to
enable the Company to provide appropriate long-term incentives to members of its
senior management and to recruit and retain additional executives to support the
growth of the Company's business.

    THE BOARD OF DIRECTORS  THEREFORE  RECOMMENDS THAT STOCKHOLDERS VOTE FOR THE
PROPOSED AMENDMENT TO THE 1996 STOCK OPTION PLAN.

DESCRIPTION OF THE 1996 STOCK OPTION PLAN

     The 1996 Stock Option Plan is  administered by the  Compensation  Committee
(the "Plan Administrator").  Except for certain  non-discretionary option grants
to  Directors  who  are not  employees,  as  described  under  "Remuneration  of
Directors and Executive  Officers"  above,  the Plan  Administrator  selects the
individuals to whom options are granted and determines the option exercise price
and other  terms of each  award,  subject  to the  provisions  of the 1996 Stock
Option Plan.  Incentive  Options may be granted under the 1996 Stock Option Plan
to  employees  of  the  Company  or its  subsidiaries,  including  officers  and
Directors  who are  also  employees.  As of  April 5,  2000,  approximately  332
employees of the Company and its  subsidiaries  were eligible to  participate in
the 1996 Stock Option Plan.  Nonqualified  Options may be granted under the 1996
Stock Option Plan to  employees,  officers,  Directors,  whether or not they are
employees of the Company or a subsidiary,  and consultants and other individuals
providing  services  to the  Company or one of its  subsidiaries.  As  described
above,  most of the options  under the 1996 Stock Option Plan will be granted to
officers of the Company.

     No options  may extend for more than ten years from the date of grant (five
years in the case of  employees  or  officers  holding  10% or more of the total
combined  voting power of all classes of stock of the Company or any  subsidiary
or  parent  ("greater-than-ten-percent-stockholder")).  The  exercise  price for
incentive stock options may not be less than the fair market value of the Common
Stock  on the  date  of  grant  (110%  of fair  market  value  in the  case of a
greater-than-ten-percent-stockholder).   The   aggregate   fair   market   value
(determined at the time of grant) of shares issuable pursuant to incentive stock
options which first become exercisable by an employee or officer in any calendar
year may not exceed $100,000.

     Options  are  non-transferable  except by will or by the laws of descent or
distribution.  Options  generally may not be exercised  after (i) termination of
the optionee's  employment with the Company,  or performance of services for the
Company, by the Company for cause or voluntary termination by the optionee, (ii)
thirty days following termination of the optionee's employment with the Company,

                                       17
<PAGE>
or  performance of services for the Company,  upon  retirement or by the Company
without  cause,  or  (iii)  one year  following  termination  of the  optionee's
employment  with the Company,  or performance of services for the Company,  as a
result of disability or death.

     Payment of the  exercise  price for shares  subject to options  may be made
with (i) cash,  check,  bank draft,  or money  order for an amount  equal to the
option price for such shares,  or (ii) shares of Common Stock (which in the case
of shares  acquired  from the  Company  upon  exercise  of an option,  have been
outstanding  for at least six months)  having a fair  market  value equal to the
exercise  price,  or (iii) an  unconditional  and  irrevocable  undertaking by a
broker to deliver  promptly to the Company  sufficient funds to pay the exercise
price,  or (iv) if so permitted by the  instrument  evidencing the option (or in
the  case  of a  nonqualified  stock  option,  by  the  Plan  Administrator),  a
promissory  note of the  optionee to the  Company,  payable on such terms as are
specified by the Plan  Administrator,  or (v) any combination of the permissible
forms of payment.  In the event that  payment of the option  price is made under
(ii) above, the Plan  Administrator  may provide that the optionee be granted an
additional  option  covering the numbers of shares  surrendered,  at an exercise
price equal to the fair market  value of a share of Common  Stock on the date of
surrender.

     At December 31, 1999,  2,598,483 shares were subject to outstanding options
granted  under the 1996 Stock  Option  Plan,  128,859  had been  purchased  upon
exercise of options granted thereunder and 372,658 shares remained available for
future grants.  As of December 31, 1999,  option prices and expiration dates for
outstanding  options  granted under the 1996 Stock Option Plan ranged from $2.75
to $12.30 per share and from June 24, 2006 to November 29,  2009,  respectively.
The Company has filed a registration statements on Form S-8 under the Securities
Act of 1933 to register the 3,700,000  shares of the Company's Common Stock that
are  currently  reserved for issuance  under the 1996 Stock Option Plan.  If the
proposed amendment is approved by the stockholders, the Company intends to file,
as  soon  as  practicable,  a  registration  statement  on Form  S-8  under  the
Securities Act of 1933 covering the  additional  shares of Common Stock issuable
under the 1996 Stock Option  Plan,  as amended.  The Board of Directors  has not
determined  what action it will take in the event that the  stockholders  do not
approve the proposal.

FEDERAL INCOME TAX INFORMATION WITH RESPECT TO THE 1996 STOCK OPTION PLAN

     The grantee of a nonqualified stock option recognizes no income for federal
income tax purposes on the grant thereof. On the exercise of such an option, the
difference  between the  exercise  price and the fair market value of the shares
purchased  under the option at the time of such  purchase  will be recognized by
the option  holder in the year of  exercise  as  ordinary  income,  and the fair
market value of the shares on the date of exercise will be the tax basis thereof
for computing  gain or loss on any  subsequent  sale. The Company may reduce its
taxable income by an amount equal to the amount  recognized by the option holder
as ordinary income upon exercise of a nonqualified stock option.

     Generally,  the grantee of an incentive  stock option  recognizes no income
for federal  income tax purposes at the time of grant or exercise of the option.
Rather,  the holder  ordinarily  will recognize  taxable income upon  subsequent
disposition  of the shares  purchased  under the option.  If no  disposition  of
shares  acquired  upon  exercise  of an  incentive  stock  option is made by the
optionee  within  two  years of the  date of grant  and  within  one year  after
exercise of the option, any gain realized by the optionee on the subsequent sale
of such shares is treated, for federal income tax purposes, as long-term capital
gain if the shares were held for more than twelve months. The price paid for the
shares  purchased  upon the  exercise  of the  option  will be the tax basis for
computing  any gain.  If the  shares are sold  prior to the  expiration  of such
period (a "disqualifying disposition"), the difference between the lesser of the
value of the stock at the date of exercise or the date of sale and the  exercise
price of the stock is treated as compensation taxable to the grantee as ordinary
income and the excess  gain,  if any, is treated as capital  gain (which will be
long-term capital gain if the shares were held for more than twelve months). The
amount by which the fair  market  value of shares at the time of exercise of the
incentive  stock option  covering such shares  exceeds the option price for such
shares is a tax preference item and is included in "alternative  minimum taxable
income" for the purpose of computing the "alternative  minimum tax." The Company
does not  withhold  any tax in  connection  with the  grant  or  exercise  of an

                                       18
<PAGE>

incentive  stock  option  and,  in the usual  circumstances,  the Company is not
entitled to any tax  deduction in  connection  with the grant or,  except on the
case of a disqualifying disposition, exercise of an incentive stock option.

The 1996 Stock  Option Plan is not  subject to the  provisions  of the  Employee
Retirement Income Security Act of 1974.

    Although the foregoing  summarizes the essential  features of the 1996 Stock
Option  Plan,  it is  qualified in its entirety by reference to the full text of
the 1996 Stock  Option Plan as amended,  which is attached as Exhibit II to this
proxy statement.

REGISTRATION OF SHARES AVAILABLE UNDER THE 1996 STOCK OPTION PLAN

     The  Company  has  filed  registration  statements  on Form S-8  under  the
Securities Act of 1933 to register the 3,700,000  shares of the Company's Common
Stock that are currently reserved for issuance under the 1996 Stock Option Plan.
If the proposed  amendment is approved by the stockholders,  the Company intends
to file, as soon as practicable,  a registration statement on Form S-8 under the
Securities Act of 1933 covering the additional  1,000,000 shares of Common Stock
that will be issuable under the 1996 Stock Option Plan, as amended. The Board of
Directors  has not  determined  what  action it will take in the event  that the
stockholders do not approve the proposal.

NEW PLAN BENEFITS

     The Company is unable to  determine  the dollar value and number of options
or shares of Common  Stock that will be issued  under the 1996 Stock Option Plan
if the  amendment  described  herein  is  approved  to (i) any of the  executive
officers,  (ii) the current  executive  officers  as a group,  (iii) the current
Directors who are not executive  officers as a group,  (iv) each nominee for the
election as a Director and (v) the employees who are not executive officers as a
group,  because,  except for  non-discretionary  option  grants to  non-employee
Directors  described  above,  options are granted on a  discretionary  basis. No
additional  benefits or amounts  would have been received by or allocated to any
such persons or groups for fiscal 1999 if the amendment to the 1996 Stock Option
Plan had been in effect throughout such year.

                              CERTAIN TRANSACTIONS

LOANS TO EXECUTIVE OFFICERS

     In 1996, in connection with the exercise by Robert N. Goldman, the Chairman
of the Board of the Company and the President and Chief Executive Officer of the
Company,  and by Justin J. Perreault,  the former  President and Chief Executive
Officer of the Company,  of stock  options  granted to them under the  Company's
1995 Nonqualified Stock Option Plan, to purchase 2,300,000 and 460,000 shares of
Common  Stock,  respectively,  the  Company  loaned  to Mr.  Goldman  and to Mr.
Perreault $572,700 and $114,540, respectively. The loan to each executive was at
an  interest  rate  of  7.0%  per  annum  and was  pursuant  to a full  recourse
promissory  note due upon the earlier of (i) April 1, 2001 and (ii) the date the
executive's employment with the Company terminates for any reason. Each loan was
originally  secured by a pledge to the Company of all the shares of Common Stock
acquired upon exercise of the option.  On January 29, 1997 the Company  released
2,048,950 and 409,790  shares from Messrs.  Goldman's and  Perreault's  pledges,
respectively,  with 251,050  shares and 50,210 shares,  respectively,  remaining
pledged to secure the outstanding  amount of principal and interest of the loans
to Messrs.  Goldman  and  Perreault,  respectively.  On  September  1, 1999,  in
connection with Mr. Perreault's resignation and separation from the Company, the
Company  forgave all  outstanding  debt of principal  and interest  owing by Mr.
Perreault to the Company under his promissory  note and further  released to Mr.
Perreault the 50,210 shares remaining  pledged to secure the outstanding  amount
of principal and interest of his loan.

                                       19
<PAGE>

         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     The  following  table sets forth  certain  information  with respect to the
beneficial  ownership of the Company's  Common Stock as of March 31, 2000 by (i)
each  person or group known to the  Company to be the  beneficial  owner of more
than five percent of the  outstanding  Common Stock;  (ii) each of the Company's
Directors  and  Director  nominees;  (iii) the  executive  officers and (iv) all
Directors,  Director nominees and executive  officers of the Company as a group.
The information as to each person has been furnished by such person.

                                               Shares Beneficially Owned (1) (2)
     Name and Address of Beneficial Owner                   Number       Percent
     ------------------------------------                   ------       -------
Robert N. Goldman                                          2,114,063        7.1%
eXcelon Corporation
25 Mall Road
Burlington, MA 01803

Tudor Investment Corporation                               1,675,000        5.7%
 40 Rowes Wharf
 Second Floor
 Boston, MA 02110 (3)

Brian W. Otis                                                469,894        1.6%
Ross A. Hinchcliffe                                          337,500        1.1%
Satish Maripuri                                              254,885          *
Lawrence E. Alston, Jr.                                      152,199          *
Lacey P. Brandt                                              185,088          *
Daniel E. O'Connor                                            90,000          *
Gerald B. Bay                                                261,894          *
Arthur J. Marks (4)                                           82,933          *
Kevin J. Burns                                                25,167          *
David A. Litwack                                              25,167          *
Justin J. Perreault (5)                                           --          *
Kirk D. Bowman (6)                                                10          *
Robert M. Agate                                                   --          *
All Directors, Director Nominees and executive             3,998,800       12.7%
officers as a group (13 persons)
* Less than one percent.

(1)  Except as otherwise  indicated,  the persons  named in this table have sole
     voting  and  investment  power with  respect to all shares of Common  Stock
     shown as  beneficially  owned by them,  subject to community  property laws
     where applicable and subject to the information  contained in the footnotes
     to this table. Amounts shown for each stockholder include shares subject to
     stock options  exercisable within 60 days of the date of this table. Shares
     not outstanding but deemed  beneficially  owned by virtue of the right of a
     person or group to acquire  them within 60 days are treated as  outstanding
     only for purposes of  determining  the number of and percent  owned by such
     person or group.  As of March 31, 2000, the date of this table,  there were
     29,233,592 shares of Common Stock outstanding.

(2)  The amounts listed include the following shares of Common Stock that may be
     acquired on or prior to May 30, 2000 through the  exercise of options:  Mr.
     Alston,  152,184  shares;  Mr. Bay,  114,500  shares;  Ms. Brandt,  178,125
     shares;  Mr.  Burns,  25,167  shares;  Mr.  Goldman,  514,063  shares;  Mr.

                                       20
<PAGE>

     Hinchcliffe 337,500 shares; Mr. Litwack 25,167 shares; Mr. Maripuri 253,235
     shares;  Mr. Marks 33,500 shares;  Mr.  O'Connor  90,000  shares;  Mr. Otis
     453,333 shares; and all Directors, Director nominees and executive officers
     as a group, 2,176,774 shares.

(3)  The  amount  listed  is from a  report  on  schedule  13F  filed  with  the
     Securities Exchange Commission on January 19, 2000.

(4)  Includes  33,500  shares  that may be  acquired on or prior to May 30, 2000
     through the exercise of options held by Mr.  Marks;  49,326 shares owned of
     record by NEA  Partners V,  Limited  Partnership;  and 107 shares  owned of
     record by NEA Silverado Partners Limited Partnership.  As a general partner
     of New Enterprise  Associates ("NEA"),  which is the general partner of the
     aforementioned  limited  partnerships,  Mr.  Marks  may be  deemed to share
     beneficial ownership of such shares.

(5)  Mr. Perreault  resigned as Chief Executive Officer effective  September 30,
     1999.

(6)  Mr.  Bowman  resigned  as  Senior  Vice  President  and  General   Manager,
     ObjectStore Division effective September 30, 1999.

                                   ACCOUNTANTS

     The Company has appointed  PricewaterhouseCoopers  LLP("PricewaterhouseCoo-
pers") as  independent  accountants  to audit the  financial  statements  of the
Company  for the fiscal  year  ending  December  31,  2000.  Representatives  of
PricewaterhouseCoopers  are expected to be present at the Annual  Meeting,  will
have  an  opportunity  to make a  statement  if they  desire  to do so,  and are
expected to be available to respond to appropriate questions from stockholders.

             SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
officers  and  Directors,  and persons who  beneficially  own more than 10% of a
registered  class  of the  Company's  equity  securities,  to  file  reports  of
ownership and changes in ownership with the  Securities and Exchange  Commission
(the "SEC"). Officers, Directors and greater-than-10%  stockholders are required
by SEC regulations to furnish the Company with copies of all Section 16(a) forms
they file.

     Based  solely  upon  a  review  of  Forms  3 and 4 and  amendments  thereto
furnished to the Company during fiscal 1999 and Forms 5 and  amendments  thereto
furnished to the Company with respect to fiscal 1999, or written representations
that Form 5 was not required, the Company believes that all Section 16(a) filing
requirements   applicable  to  its  officers,   Directors  and  greater-than-10%
stockholders were fulfilled in a timely manner.


                              STOCKHOLDER PROPOSALS

     Stockholder  proposals for inclusion in the proxy materials  related to the
2001 Annual Meeting of  Stockholders  or special meeting in lieu thereof must be
received by the Company at its executive offices no later than Sunday,  December
24, 2001. In addition,  the Company's  By-Laws  provide that a stockholder  must
give  written  notice to the  Company  not less  than  sixty  days  prior to the
scheduled  annual  meeting  describing  any  proposal to be brought  before such
Meeting,  even  if  such  item  is not to be  included  in the  Company's  proxy
statement  relating to such Meeting.  Such notice  requirements are set forth in
Section 3 of the Company's By-Laws. To bring an item of business before the 2001
Annual Meeting,  a stockholder must deliver the requisite notice of such item to
the Secretary of the Company no later than Sunday, March 25, 2001.


                                       21
<PAGE>

                                  MISCELLANEOUS

     The Board does not intend to present  to the Annual  Meeting  any  business
other  than  the  proposals  listed  herein,  and the  Board  was not  aware,  a
reasonable  time before  mailing this Proxy  Statement to  stockholders,  of any
other business which properly may be presented for action at the Annual Meeting.
If any other business should come before the Annual Meeting, the persons present
will have  discretionary  authority  to vote the shares they own or represent by
proxy in accordance with their judgment.


                              AVAILABLE INFORMATION

     STOCKHOLDERS  OF RECORD ON APRIL 5, 2000 WILL RECEIVE,  IN ADDITION TO THIS
PROXY STATEMENT,  THE COMPANY'S ANNUAL REPORT TO STOCKHOLDERS FOR THE YEAR ENDED
DECEMBER 31, 1999, WHICH CONTAINS DETAILED FINANCIAL INFORMATION  CONCERNING THE
COMPANY.  THE COMPANY WILL MAIL,  WITHOUT CHARGE, A COPY OF THE COMPANY'S ANNUAL
REPORT ON FORM 10-K (EXCLUDING EXHIBITS) TO ANY STOCKHOLDER SOLICITED HEREBY WHO
REQUESTS  IT IN  WRITING.  PLEASE  SUBMIT ANY SUCH  WRITTEN  REQUEST TO INVESTOR
RELATIONS, EXCELON CORPORATION, 25 MALL ROAD, BURLINGTON, MASSACHUSETTS 01803.



                                       22
<PAGE>

                                    EXHIBIT I

              EXCELON CORPORATION 1996 EMPLOYEE STOCK PURCHASE PLAN

1. PURPOSE.

The eXcelon  Corporation  1996  Employee  Stock  Purchase  Plan (the  "Plan") is
intended  to provide a method  whereby  employees  of eXcelon  Corporation  (the
"Company")  will have an  opportunity  to  acquire  an  ownership  interest  (or
increase an existing ownership  interest) in the Company through the purchase of
shares of the Common  Stock of the Company.  It is the  intention of the Company
that the Plan qualify as an "employee  stock purchase plan" under Section 423 of
the Internal  Revenue Code of 1986, as amended (the "Code").  The  provisions of
the  Plan  shall,   accordingly,   be  construed  so  as  to  extend  and  limit
participation  in a manner  consistent with the  requirements of that section of
the Code.

2. DEFINITIONS.


         (a)"Board" means the Board of Directors of the Company.

         (b) "Code" shall have the meaning set forth in Paragraph 1.

         (c) "Committee" means the Compensation Committee of the Board.

         (d) "Common  Stock" means the common stock,  par value $.001 per share,
         of the Company.

         (e)  "Company"  shall  also  include  any  Subsidiary  (as  hereinafter
         defined) of eXcelon Corporation designated as a participant in the Plan
         by the Board, unless the context otherwise requires.

         (f)  "Compensation"  means, for the purpose of any Offering pursuant to
         this Plan, base pay in effect as of the Offering  Commencement Date (as
         hereinafter  defined).  Compensation  shall not  include  any  deferred
         compensation other than contributions by an individual through a salary
         reduction  agreement  to a cash or  deferred  plan  pursuant to Section
         401(k) of the Code or to a  cafeteria  plan  pursuant to Section 125 of
         the Code.

         (g)  "Employee"  means any person who is  customarily  employed  by the
         Company  for more than 20 hours  per week and more than five  months in
         any calendar year.

         (h) "Offering" shall have the meaning set forth in Paragraph 4.

         (i)  "Offering  Commencement  Date" shall have the meaning set forth in
         Paragraph 4.

         (j)  "Offering  Termination  Date"  shall have the meaning set forth in
         Paragraph 4.

         (k) "Plan" shall have the meaning set forth in Paragraph 1.

         (l) "Subsidiary"  shall mean any present or future corporation which is
         or would constitute a "subsidiary  corporation" as that term is defined
         in Section 425 of the Code.

     3. ELIGIBILITY.

         (a) Participation in the Plan is completely voluntary. Participation in
         any one or more of the Offerings  under the Plan shall  neither  limit,
         nor  require,  participation  in any  other  Offering  (as  hereinafter
         defined).

                                       23
<PAGE>

         (b) Each  employee  of the  Company  whose  service  with  the  Company
         commences on or after November 1, 1996 shall be eligible to participate
         in the Plan on the first  Offering  Commencement  Date, as  hereinafter
         defined,  following the completion of six months of continuous  service
         with the Company.  Each  employee of the Company whose service with the
         Company  commenced  prior to  November  1, 1996  shall be  eligible  to
         participate  in  the  Plan  on the  first  Offering  Commencement  Date
         following the commencement of service with the Company. Notwithstanding
         the foregoing, no employee shall be granted an option under the Plan:


            (i) if,  immediately after the grant, such employee would own stock,
            and/or hold outstanding options to purchase stock,  possessing 5% or
            more of the total  combined  voting power or value of all classes of
            stock  of the  Company  or any  Subsidiary;  for  purposes  of  this
            Paragraph,  the rules of Section  424(d) of the Code shall  apply in
            determining the stock ownership of any employee; or


            (ii) which  permits his rights to  purchase  stock under all Section
            423  employee   stock   purchase   plans  of  the  Company  and  its
            Subsidiaries to exceed $25,000 of the fair market value of the stock
            (determined  at the time such option is granted)  for each  calendar
            year in which  such  option is  outstanding;  for  purposes  of this
            Paragraph, the rules of Section 423(b)(8) of the Code shall apply.

     4. OFFERING DATES.

     The right to purchase stock  hereunder  shall be made available by a series
     of  six-month  offerings  (the  "Offering"  or  "Offerings")  to  employees
     eligible in accordance with Paragraph 3 hereof.  The Committee will, in its
     discretion,  determine  the  applicable  date  of  commencement  ("Offering
     Commencement Date") and termination date ("Offering  Termination Date") for
     each Offering.  Participation in any one or more of the Offerings under the
     Plan shall neither limit, nor require, participation in any other Offering.

     5. PARTICIPATION.

     Any eligible  employee  may become a  participant  by  completing a payroll
     deduction authorization form provided by the Company and filing it with the
     Company's Treasurer 20 days prior to each applicable Offering  Commencement
     Date, as determined by the Committee pursuant to Paragraph 4.

     6. PAYROLL DEDUCTIONS.

         (a) At the time a  participant  files an  authorization  for a  payroll
         deduction, the participant shall elect to have deductions made from his
         or her pay on each payday  during any  Offering in which he or she is a
         participant,  at a specified  percentage of his or her  Compensation as
         determined  on  the  applicable   Offering   Commencement   Date;  said
         percentage  shall  be in  increments  of one  percent  up to a  maximum
         percentage of six percent.

         (b) Payroll deductions for a participant shall commence on the Offering
         Commencement  Date  when the  applicable  authorization  for a  payroll
         deduction becomes  effective and shall end on the Offering  Termination
         Date of the Offering to which such authorization is applicable,  unless
         sooner terminated by the participant as provided in Paragraph 9.

         (c) All payroll  deductions made for a participant shall be credited to
         his or her  account  under the  Plan.  A  participant  may not make any
         separate cash payment into such account.

         (d) A  participant  may  withdraw  from the Plan at any time during the
         applicable Offering period.

                                       24
<PAGE>

     7. GRANTING OF OPTION.

         (a) On the Offering Commencement Date of each Offering, a participating
         employee  shall be deemed to have been  granted an option to purchase a
         maximum  number  of  shares  of the  Common  Stock  equal to an  amount
         determined  as  follows:  (i) 85% of the market  value per share of the
         Common  Stock on the  applicable  Offering  Commencement  Date shall be
         divided  into an amount equal to the sum of (x) the  percentage  of the
         employee's  Compensation  which he or she has elected to have  withheld
         (multiplied by the employee's  Compensation  over the Offering  period)
         plus  (y)  any  amounts  in the  employee's  account  on  the  Offering
         Commencement  Date that have been carried forward from prior Offerings;
         multiplied by (ii) two. Such market value per share of the Common Stock
         shall be determined as provided in clause (i) of Paragraph 7(b).

         (b) The  option  price  of the  Common  Stock  purchased  with  payroll
         deductions  made during each such  Offering for a  participant  therein
         shall be the lower of:

                  (i) 85% of the  average  of the bid and the  asked  prices  as
                  reported  by Nasdaq  in the Wall  Street  Journal,  or, if the
                  Common Stock is  designated as a national  market  security by
                  the National Association of Securities Dealers, Inc. ("NASD"),
                  the last trading  price of the Common Stock as reported by the
                  Nasdaq National Market System in the Wall Street Journal,  or,
                  if the  Common  Stock is listed on an  exchange,  the  closing
                  price of the  Common  Stock on the  exchange  on the  Offering
                  Commencement  Date applicable to such Offering (or on the next
                  regular  business  date on which  shares of the  Common  Stock
                  shall be  traded,  in the event  that no shares of the  Common
                  Stock have been traded on the Offering  Commencement Date); or
                  if the Common Stock is not quoted on Nasdaq, not designated as
                  a  Nasdaq  national  market  security  and  not  listed  on an
                  exchange,  85% of  the  fair  market  value  on  the  Offering
                  Commencement Date as determined by the Committee; and

                  (ii) 85% of the  average  of the bid and the  asked  prices as
                  reported  by Nasdaq  in the Wall  Street  Journal,  or, if the
                  Common Stock is  designated as a national  market  security by
                  the  NASD,  the  last  trading  price of the  Common  Stock as
                  reported  by the  Nasdaq  National  Market  System in the Wall
                  Street  Journal,  or,  if the  Common  Stock is  listed  on an
                  exchange,  the  closing  price  of  the  Common  Stock  on the
                  exchange on the Offering  Termination  Date applicable to such
                  Offering (or on the next regular business date on which shares
                  of the  Common  Stock  shall be  traded,  in the event that no
                  shares of the  Common  Stock  shall  have  been  traded on the
                  Offering  Termination  Date);  or if the  Common  Stock is not
                  quoted on Nasdaq,  not designated as a Nasdaq  national market
                  security and not listed on an exchange, 85% of the fair market
                  value on the Offering  Termination  Date as  determined by the
                  Committee.

     8. EXERCISE OF OPTION.

         (a) Unless a participant  gives written  notice to the Treasurer of the
         Company as hereinafter provided,  his or her option for the purchase of
         Common Stock with payroll  deductions  made during any Offering will be
         deemed to have been exercised automatically on the Offering Termination
         Date applicable to such Offering for the purchase of the number of full
         shares of Common Stock which the accumulated  payroll deductions in his
         or her  account  at that time (plus any  amounts in his or her  account
         that have been carried  forward from prior  Offerings) will purchase at
         the applicable  option price (but not in excess of the number of shares
         for which  options  have been  granted  to the  employee,  pursuant  to
         Paragraph  7(a)),  and any  excess in his  account at that time will be
         automatically   carried   forward  to  the  next  Offering  unless  the
         participant  elects, by written notice to the Treasurer of the Company,
         to have the excess returned to the participant.

                                       25
<PAGE>

         (b)  Fractional  shares  will  not be  issued  under  the  Plan and any
         accumulated  payroll  deductions which would have been used to purchase
         fractional  shares shall be  automatically  carried forward to the next
         Offering  unless  the  participant  elects,  by  written  notice to the
         Treasurer  of the  Company,  to have the excess  cash  returned  to the
         participant.

     9. WITHDRAWAL AND TERMINATION.

         (a)  Prior  to the  Offering  Termination  Date  for an  Offering,  any
         participant may withdraw the payroll deductions  credited to his or her
         account  under the Plan for such Offering by giving  written  notice to
         the  Treasurer  of  the  Company.  All  of  the  participant's  payroll
         deductions  credited to such  account  will be paid to the  participant
         promptly after receipt of notice of withdrawal,  without interest,  and
         no future  payroll  deductions  will be made from his or her pay during
         such  Offering.  The  Company  will  treat any  attempt  to borrow by a
         participant  on the security of  accumulated  payroll  deductions as an
         election to withdraw such deductions.

         (b) A participant's election not to participate in, or withdrawal from,
         any Offering  will not have any effect upon his or her  eligibility  to
         participate in any succeeding Offering or in any similar plan which may
         hereafter be adopted by the Company.

         (c) Upon  termination of the  participant's  employment for any reason,
         including  retirement  but  excluding  death,  the  payroll  deductions
         credited to his or her account will be returned to the participant, or,
         in the case of his or her  death,  to the  person or  persons  entitled
         thereto under Paragraph 13.

         (d) Upon termination of the participant's  employment because of death,
         his or her  beneficiary  (as  defined in  Paragraph  13) shall have the
         right to elect,  by written  notice  given to the  Company's  Treasurer
         prior to the expiration of a period of 90 days commencing with the date
         of the death of the participant, either:

                  (i) to withdraw all of the payroll deductions  credited to the
                  participant's account under the Plan; or

                  (ii) to exercise the participant's  option for the purchase of
                  stock on the Offering Termination Date next following the date
                  of the  participant's  death for the purchase of the number of
                  full shares which the  accumulated  payroll  deductions in the
                  participant's  account at the date of the participant's  death
                  will purchase at the applicable  option price,  and any excess
                  in such account will be returned to said  beneficiary.  In the
                  event that no such  written  notice of election  shall be duly
                  received  by  the  office  of  the  Company's  Treasurer,  the
                  beneficiary  shall  automatically be deemed to have elected to
                  withdraw the payroll deductions  credited to the participant's
                  account  at the date of the  participant's  death and the same
                  will be paid promptly to said beneficiary.

     10. INTEREST.

     No  interest  will be paid or  allowed  on any money  paid into the Plan or
     credited to the account of any participating employee.

     11. STOCK.

         (a) The maximum number of shares of Common Stock available for issuance
         and purchase by employees  under the Plan,  subject to adjustment  upon
         changes in  capitalization  of the Company as provided in Paragraph 16,
         shall be 500,000 shares of Common Stock,  $.001 par value per share, of
         the  Company.  If the  total  number of shares  for which  options  are
         exercised on any Offering Termination Date in accordance with Paragraph
         8 exceeds the number of shares that remain  available  for issuance and
         purchase by employees under the Plan, the Company shall make a pro rata

                                       26
<PAGE>

         allocation of the shares  available for delivery and distribution in an
         equitable manner,  with the balances of payroll deductions  credited to
         the  account  of each  participant  under  the  Plan  returned  to each
         participant.

         (b) The  participant  will have no interest in the stock covered by his
         or her option until such option has been exercised.

     12. ADMINISTRATION.

     The Plan shall be administered  by the Committee.  The  interpretation  and
     construction  of any  provision  of the Plan  and  adoption  of  rules  and
     regulations  for  administering  the Plan  shall be made by the  Committee.
     Determinations  made  by  the  Committee  with  respect  to any  matter  or
     provision contained in the Plan shall be final, conclusive and binding upon
     the   Company   and   upon   all   participants,   their   heirs  or  legal
     representatives.  Any rule or  regulation  adopted by the  Committee  shall
     remain in full  force and  effect  unless and until  altered,  amended,  or
     repealed by the Committee.

     13. DESIGNATION OF BENEFICIARY.

     A  participant  shall  file  with the  Treasurer  of the  Company a written
     designation of a beneficiary who is to receive any Common Stock and/or cash
     under the Plan.  Such  designation  of  beneficiary  may be  changed by the
     participant at any time by written notice.  Upon the death of a participant
     and upon receipt by the Company of proof of the identity and existence of a
     beneficiary  validly  designated  by the  participant  under the Plan,  the
     Company shall deliver such Common Stock and/or cash to such beneficiary. In
     the event of the death of a participant and in the absence of a beneficiary
     validly  designated  under  the  Plan  who is  living  at the  time of such
     participant's  death,  the Company  shall  deliver such Common Stock and/or
     cash to the executor or administrator of the estate of the participant.  No
     beneficiary  shall, prior to the death of the participant by whom he or she
     has been  designated,  acquire any interest in the Common Stock and/or cash
     credited to the participant under the Plan.

     14. TRANSFERABILITY.

     Neither  payroll  deductions  credited to a  participant's  account nor any
     rights with regard to the exercise of an option or to receive  Common Stock
     under the Plan may be assigned, transferred, pledged, or otherwise disposed
     of in any way by the participant  other than by will or the laws of descent
     and distribution. Any such attempted assignment, transfer, pledge, or other
     disposition shall be without effect, except that the Company may treat such
     act as an election to withdraw funds in accordance with Paragraph 8(b).

     15. USE OF FUNDS.

     All payroll deductions  received or held by the Company under this Plan may
     be used by the Company for any corporate purpose, and the Company shall not
     be obligated to segregate such payroll deductions.

     16. EFFECT OF CHANGES OF COMMON STOCK.

     If the Company  shall  subdivide or  reclassify  the Common Stock which has
     been or may be  optioned  under this Plan,  or shall  declare  thereon  any
     dividend  payable in shares of such Common  Stock,  or shall take any other
     action of a similar nature affecting such Common Stock, then the number and
     class of shares of Common  Stock which may  thereafter  be optioned (in the
     aggregate and to any participant) shall be adjusted  accordingly and in the
     case of each option  outstanding at the time of any such action, the number
     and class of shares  which may  thereafter  be  purchased  pursuant to such
     option and the option  price per share  shall be adjusted to such extent as
     may be  determined  by  the  Committee,  following  consultation  with  the
     Company's  independent public  accountants and counsel,  to be necessary to
     preserve the rights of the holder of such option.


                                       27
<PAGE>

     17. AMENDMENT OR TERMINATION.

     The Board may at any time terminate or amend the Plan. No such  termination
     shall affect  options  previously  granted,  nor may an amendment  make any
     change in any option  theretofore  granted which would adversely affect the
     rights of any participant holding options under the Plan.

     18. NOTICES.

     All notices or other  communications  by a participant to the Company under
     or in connection with the Plan shall be deemed to have been duly given when
     received by the Treasurer of the Company.

     19. MERGER OR CONSOLIDATION.

     If the Company  shall at any time merge into or  consolidate  with  another
     corporation,  the holder of each option then outstanding will thereafter be
     entitled  to  receive  at the  next  Offering  Termination  Date,  upon the
     exercise of such option and for each share as to which such option shall be
     exercised,  the  securities or property  which a holder of one share of the
     Common  Stock  was  entitled  to upon  and at the  time of such  merger  or
     consolidation.  In  accordance  with this  Paragraph  and Paragraph 16, the
     Committee  shall  determine  the  kind and  amount  of such  securities  or
     property  which such holder of an option  shall be  entitled to receive.  A
     sale of all or  substantially  all of the  assets of the  Company  shall be
     deemed a merger or consolidation for the foregoing purposes.

     20. APPROVAL OF STOCKHOLDERS.

     The Plan is subject to the approval of the  stockholders  of the Company by
     written  consent or at their next annual meeting or at any special  meeting
     of the stockholders for which one of the purposes of such a special meeting
     shall be to act upon the Plan.

     21. GOVERNMENTAL AND OTHER REGULATIONS.

     The Plan,  and the grant and  exercise  of the  rights to  purchase  shares
     hereunder, and the Company's obligation to sell and deliver shares upon the
     exercise of rights to purchase  shares,  shall be subject to all applicable
     federal,  state  and  foreign  laws,  rules  and  regulations,  and to such
     approvals by any regulatory or  governmental  agency as may, in the opinion
     of counsel for the Company, be required. The Plan shall be governed by, and
     construed and enforced in accordance  with, the provisions of Sections 421,
     423 and 424 of the Code and the  substantive  laws of The  Commonwealth  of
     Massachusetts. In the event of any inconsistency between such provisions of
     the Code and any such laws, said provisions of the Code shall govern to the
     extent  necessary to preserve the  favorable  federal  income tax treatment
     afforded employee stock purchase plans under Section 423 of the Code.


                                       28
<PAGE>
                                   EXHIBIT II

                               EXCELON CORPORATION

                         1996 INCENTIVE AND NONQUALIFIED
                                STOCK OPTION PLAN

SECTION 1.      PURPOSE

      This 1996  Incentive  and  Nonqualified  Stock Option Plan (the "Plan") is
intended as a  performance  incentive  for  officers  and  employees  of eXcelon
Corporation,  a Delaware  corporation (the  "Company"),  or its Subsidiaries (as
hereinafter defined) and for certain other individuals  providing services to or
acting as Directors of the Company or its Subsidiaries, to enable the persons to
whom options are granted (an "Optionee" or "Optionees") to acquire or increase a
proprietary  interest in the Company and its success.  The Company  intends that
this  purpose  will be  effected  by the  granting of  incentive  stock  options
("Incentive  Options") as defined in Section 422 of the Internal Revenue Code of
1986, as amended (the "Code"), and other stock options ("Nonqualified  Options")
under the Plan. The term  "Subsidiaries"  means any  corporations in which stock
possessing  50% or more of the total  combined  voting  power of all  classes of
stock of such corporation or corporations is owned directly or indirectly by the
Company.

SECTION 2.      OPTIONS TO BE GRANTED AND ADMINISTRATION

      2.1.  OPTIONS TO BE GRANTED.  Options granted under the Plan may be either
Incentive  Options or  Nonqualified  Options.  If an option is intended to be an
Incentive  Option,  and if for any reason such  option (or any portion  thereof)
shall  not  qualify  as an  Incentive  Option,  then,  to  the  extent  of  such
nonqualification,  such  option (or  portion  thereof)  shall be  regarded  as a
Nonqualified  Option  appropriately  granted  under the Plan  provided that such
option (or portion thereof) otherwise meets the Plan's requirements  relating to
Nonqualified Options.

      2.2.  ADMINISTRATION.  This Plan shall be administered by the Compensation
Committee  or any other  committee of the Board of Directors of the Company (the
"Board"),  consisting of two or more  "Outside  Directors"  (such  committee may
hereinafter  be referred to as the "Plan  Administrator").  As used herein,  the
term  "Outside  Director"  means any Director who: (i) is not an employee of the
Company or of any "affiliated group" (as such term is defined in Section 1504(a)
of the Code) which includes the Company (an  "Affiliate");  (ii) is not a former
employee of the Company or any Affiliate who is receiving compensation for prior
services (other than benefits under a tax-qualified  retirement plan) during the
Company's or any Affiliate's  taxable year; (iii) has not been an officer of the
Company  or any  Affiliate;  and (iv)  does not  receive  remuneration  from the
Company or any Affiliate,  either directly or indirectly,  in any capacity other
than as a Director.

      Except as specifically  reserved to the Board under the terms of the Plan,
the Plan  Administrator  shall have full and final authority to operate,  manage
and administer the Plan on behalf of the Company.  This authority includes,  but
is  not  limited  to:  (i)  the  power  to  grant   options   conditionally   or
unconditionally;  (ii)  the  power  to  prescribe  the  form  or  forms  of  the
instruments  evidencing  options  granted  under this  Plan;  (iii) the power to
interpret the Plan;  (iv) the power to provide  regulations for the operation of
the incentive  features of the Plan, and otherwise to prescribe  regulations for
interpretation,  management  and  administration  of the Plan;  (v) the power to
delegate to other persons the responsibility for performing  ministerial acts in
furtherance  of the  Plan's  purpose;  (vi)  the  power  to  make,  in its  sole
discretion,  changes to any outstanding option granted under the Plan, including
the power to reduce the exercise price, to accelerate the vesting  schedule,  or
to extend the  expiration  date;  and (vii) the power to engage the  services of
persons or organizations in furtherance of the Plan's purpose, including but not
limited to banks, insurance companies, brokerage firms and consultants.

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<PAGE>

      In addition, as to each option, the Plan Administrator shall have full and
final authority,  in its sole discretion:  (i) to determine the number of shares
subject to each  option;  (ii) to determine  the time or times at which  options
will be granted;  (iii) to determine  the  conditions  on which  options will be
granted or may be  exercised;  (iv) to determine the option price for the shares
subject  to  each  option,  which  price  shall  be  subject  to the  applicable
requirements, if any, of Section 5.1(c) hereof; and (v) to determine the time or
times when each option shall become exercisable and the duration of the exercise
period, which shall not exceed the limitations specified in Section 5.1(a).

      No member of the committee serving as Plan  Administrator  shall be liable
for any action or  determination  made in good faith with respect to the Plan or
any option granted thereunder.

      2.3. APPOINTMENT AND PROCEEDINGS OF COMMITTEE. The Board may, from time to
time,  appoint  members  of the  committee  serving  as  Plan  Administrator  in
substitution for, or in addition to, members  previously  appointed and may fill
vacancies, however caused, in such committee;  provided, however, that each such
appointee  will be an  Outside  Director,  as  described  in  Section  2.2.  The
committee  serving as Plan  Administrator  shall hold its meetings at such times
and  places  as it  shall  deem  advisable.  A  majority  of its  members  shall
constitute  a quorum,  and all  actions  of such  committee  shall  require  the
affirmative  vote of a  majority  of its  members.  Any action may be taken by a
written  instrument signed by all of the members,  and any action so taken shall
be as fully  effective  as if it had been taken by a vote of a  majority  of the
members at a meeting duly called and held.

SECTION 3.      STOCK

      3.1.  SHARES  SUBJECT TO PLAN.  The stock  subject to the options  granted
under the Plan shall be shares of the Company's  authorized but unissued  common
stock,  par value $.001 per share ("Common  Stock"),  or shares of the Company's
Common  Stock held in  treasury.  The total  number of shares that may be issued
pursuant  to options  granted  under the Plan shall not exceed an  aggregate  of
3,700,000 shares of Common Stock, PROVIDED, HOWEVER, that (i) prior to the first
anniversary  of the adoption of the Plan,  no more than an aggregate  maximum of
1,200,000  shares may be issued pursuant to options granted under the Plan, (ii)
prior to the second  anniversary  of the  adoption of the Plan,  no more than an
aggregate  maximum of 1,500,000 shares may be issued pursuant to options granted
under the Plan,  (iii)  prior to the third  anniversary  of the  adoption of the
Plan,  no more than an  aggregate  maximum  of  2,800,000  shares  may be issued
pursuant to options granted under the Plan, (iv) prior to the fourth anniversary
of the  adoption of the Plan,  no more than an  aggregate  maximum of  3,100,000
shares may be issued  pursuant to options  granted under the Plan,  (v) prior to
the fifth  anniversary  of the  adoption of the Plan,  no more than an aggregate
maximum of 3,400,000  shares may be issued pursuant to options granted under the
Plan.  After the fifth  anniversary of the adoption of the Plan, no more than an
aggregate  maximum of 3,700,000 shares may be issued pursuant to options granted
under the Plan. Such number of shares shall be subject to adjustment as provided
in Section 7 hereof.

      3.2. LAPSED OR UNEXERCISED OPTIONS.  Whenever any outstanding option under
the Plan  expires,  is  cancelled  or is  otherwise  terminated  (other  than by
exercise),  the shares of Common Stock allocable to the  unexercised  portion of
such option shall be restored to the Plan and shall again become  available  for
the grant of other options under the Plan.

      3.3. LIMITATION ON GRANTS. In no event may any Plan participant be granted
options with  respect to more than 500,000  shares of Common Stock in any fiscal
year.  The  number  of shares of Common  Stock  issuable  pursuant  to an option
granted to a Plan  participant in a fiscal year that is subsequently  forfeited,
cancelled or otherwise  terminated  shall continue to count toward the foregoing
limitation in such fiscal year. In addition,  if the exercise price of an option
is subsequently  reduced,  the transaction shall be deemed a cancellation of the
original option and the grant of a new one so that both transactions shall count
toward  the  maximum  shares  issuable  in the  fiscal  year of each  respective
transaction.


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<PAGE>

SECTION 4.      ELIGIBILITY

      4.1. ELIGIBLE OPTIONEES. Incentive Options may be granted only to officers
and other employees of the Company or its Subsidiaries, including members of the
Board  who are also  employees  of the  Company  or a  Subsidiary.  Nonqualified
Options  may be granted to  officers  or other  employees  of the Company or its
Subsidiaries,  to  members  of  the  Board  or the  Board  of  Directors  of any
Subsidiary  whether or not employees of the Company or such  Subsidiary,  and to
consultants  and other  individuals  providing  services  to the  Company or its
Subsidiaries.

      4.2. LIMITATIONS ON 10% STOCKHOLDERS. No Incentive Option shall be granted
to an  individual  who,  at the time  the  Incentive  Option  is  granted,  owns
(including  ownership  attributed  pursuant to Section  424(d) of the Code) more
than 10% of the  total  combined  voting  power of all  classes  of stock of the
Company  or any  parent  or  Subsidiary  of  the  Company  (a  "greater-than-10%
stockholder"), unless such Incentive Option provides that (i) the purchase price
per share  shall not be less than 110% of the fair  market  value of the  Common
Stock at the time such Incentive Option is granted, and (ii) that such Incentive
Option shall not be exercisable to any extent after the expiration of five years
from the date on which it is granted.

      4.3.  LIMITATION ON EXERCISABLE  OPTIONS.  The aggregate fair market value
(determined  at the time the  Incentive  Option is granted) of the Common  Stock
with respect to which  Incentive  Options are  exercisable for the first time by
any person  during any  calendar  year under the Plan and under any other option
plan of the Company (or a parent or  subsidiary as defined in Section 424 of the
Code) shall not exceed  $100,000.  Any option granted in excess of the foregoing
limitation shall be specifically designated as being a Nonqualified Option.

      4.4.  OPTION  GRANTS TO  DIRECTORS.  As  compensation  for services to the
Company,  each Director of the Company who is not an employee of the Company (an
"Outside  Director")  and who is elected  to the Board  shall  automatically  be
granted upon his or her initial election a fully-vested  Nonqualified Option (an
"Initial  Option") to purchase 15,000 shares of Common Stock of the Company.  In
addition,  immediately  following  each annual  meeting of  stockholders  of the
Company or special meeting in lieu thereof, there shall automatically be granted
to each Outside Director  reelected at or remaining in office after such meeting
a  fully-vested  Nonqualified  Option to purchase  5,000 shares of Common Stock.
Each Nonqualified Option granted to an Outside Director pursuant to this Section
4.4 shall  expire on the tenth  anniversary  of the date of grant.  The exercise
price of each Nonqualified  Option granted pursuant to this Section 4.4 shall be
equal to the fair market value of the Common Stock on the date the  Nonqualified
Option is granted,  such fair market value to be determined  in accordance  with
the provisions of Section 5.1(c).

SECTION 5.      TERMS OF THE OPTION AGREEMENTS

      5.1.  MANDATORY TERMS. Each option agreement shall contain such provisions
as the Plan  Administrator  shall  from  time to time deem  appropriate.  Option
agreements  need not be  identical,  but each option  agreement  by  appropriate
language shall include the substance of all of the following provisions:

          (a) EXPIRATION.  Notwithstanding any other provision of the Plan or of
any option  agreement,  each option  shall  expire on the date  specified in the
option  agreement,  which date shall not be later than the tenth  anniversary of
the date on which the option was granted  (fifth  anniversary  in the case of an
Incentive Option granted to a greater-than-10% stockholder).

          (b)  EXERCISE.  Each  option  shall  be  exercisable  in  full  or  in
installments  (which need not be equal) and at such times as  designated  by the
Plan Administrator.  To the extent not exercised,  installments shall accumulate
and be exercisable, in whole or in part, at any time after becoming exercisable,
but not later than the date the option expires.

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<PAGE>

          (c) PURCHASE  PRICE.  The purchase price per share of the Common Stock
under each Incentive  Option shall be not less than the fair market value of the
Common Stock on the date the option is granted (110% of the fair market value in
the case of a  greater-than-10%  stockholder).  The price at which shares may be
purchased  pursuant  to  Nonqualified  Options  shall be  specified  by the Plan
Administrator at the time the option is granted, and shall be not less than fair
market value of the shares of Common Stock on the date such Nonqualified  Option
is  granted.  For the purpose of the Plan,  the fair market  value of the Common
Stock shall be the closing price per share on the date of grant of the option as
reported by a nationally  recognized stock exchange,  or, if the Common Stock is
not listed on such an  exchange,  as reported  by the  National  Association  of
Securities  Dealers Automated  Quotation  System,  Inc.  ("Nasdaq"),  or, if the
Common Stock is not quoted on Nasdaq, the fair market value as determined by the
Plan Administrator.

          (d) TRANSFERABILITY OF OPTIONS. Options granted under the Plan and the
rights  and  privileges  conferred  thereby  may not be  transferred,  assigned,
pledged or hypothecated in any manner (whether by operation of law or otherwise)
other than by will or by applicable laws of descent and distribution,  and shall
not be subject to execution,  attachment or similar process. Upon any attempt so
to transfer,  assign,  pledge,  hypothecate  or otherwise  dispose of any option
under the Plan or any  right or  privilege  conferred  hereby,  contrary  to the
provisions  of the Plan,  or upon the sale or levy or any  attachment or similar
process  upon the rights and  privileges  conferred  hereby,  such option  shall
thereupon terminate and become null and void.

          (e)  TERMINATION  OF  EMPLOYMENT  OR  DISABILITY OR DEATH OF OPTIONEE.
Except as may be otherwise expressly provided in the terms and conditions of the
option granted to an Optionee:

                (i) Options granted hereunder shall terminate on the earliest to
occur of:

                         (A) the date of expiration thereof;

                         (B)  the  date  of   termination   of  the   Optionee's
employment  with or  performance of services for the Company by the Optionee for
any reason (other than as a result of  retirement,  death or permanent and total
disability  of the  Optionee)  or by  the  Company  for  cause  (as  hereinafter
defined);

                         (C) thirty  days after the date of  termination  of the
Optionee's  employment  with or  performance  of services  for the Company  upon
retirement  or by the Company  without cause (other than as a result of death or
permanent and total disability of the Optionee);

                         (D) twelve months after the date of  termination of the
Optionee's  employment  with or  performance  of  services  for the Company as a
result of the  death or  permanent  and  total  disability  of an  Optionee.  An
Optionee is  permanently  and totally  disabled if he is unable to engage in any
substantial gainful activity by reason of any medically determinable physical or
mental  impairment which can be expected to last for a continuous  period of not
less than twelve months;  permanent and total  disability shall be determined in
accordance  with  Section  22(e)(3)  of the  Code  and  the  regulations  issued
thereunder.

                (ii) In the event of the termination of an Optionee's employment
with or  performance  of services for the Company by the Company  without  cause
(other  than as a result  of death or  permanent  and  total  disability  of the
Optionee) or upon the  Optionee's  retirement,  the  Optionee's  option shall be
exercisable during the thirty-day post-termination period described in Paragraph
5.1(e)(i)(C)  only to the  extent  that it was  exercisable  at the time of such
termination  of  employment  or  performance  of  services.  In the event of the
termination of the Optionee's employment with or performance of services for the
Company as a result of the  permanent and total  disability of an Optionee,  the
Optionee's option shall be exercisable during the twelve-month  post-termination
period  referred  to in  Paragraph  5.1(e)(i)(D)  only to the extent that it was
exercisable at the time of such termination of employment or performance of

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<PAGE>

services.  In the event of the termination of the Optionee's  employment with or
performance  of  services  for the  Company  as a  result  of the  death  of the
Optionee,  the Optionee's  executor,  administrator  or any person or persons to
whom  his  option  may  be  transferred  by  will  or by  laws  of  descent  and
distribution   shall  have  the  right  at  any  time  during  the  twelve-month
post-termination  period referred to in Paragraph  5.1(e)(i)(D) to exercise such
option, but only to the extent the Optionee was entitled to exercise such option
at the time of such  termination  of  employment  or  performance  of  services.
Notwithstanding  the  foregoing,   should  the  termination  of  the  Optionee's
employment  with or performance of services for the Company as a result of death
or permanent and total disability occur after the first  anniversary of the date
on which  the  Optionee  was  first  employed  or  otherwise  began to serve the
Company,  the option may be  exercised  for up to the  greater of (A) 50% of all
option  shares  (and such  shares  shall be deemed  vested) or (B) the number of
shares that had vested as of the date of such  termination of employment with or
performance of services for the Company.

                (iii) An  employment  relationship  between  the Company and the
Optionee  shall be deemed to exist  during any period in which the  Optionee  is
employed in any capacity by the Company or by any Subsidiary. Whether authorized
leave of absence or absence on military or government  service shall  constitute
termination of the employment  relationship between the Company and the Optionee
shall be determined by the Plan Administrator at the time thereof.  For purposes
of this Section  5.1(e),  the term "cause" shall mean (A) any material breach by
the  Optionee of any  agreement  to which the  Optionee and the Company are both
parties,  (B) any act (other than retirement) or omission to act by the Optionee
which may have a material and adverse effect on the Company's business or on the
Optionee's  ability to perform  services  for the  Company,  including,  without
limitation,  the commission of any crime (other than minor traffic  violations),
or (C) any material  misconduct or material neglect of duties by the Optionee in
connection  with the  business  or affairs of the Company or any  Subsidiary  or
affiliate of the Company.

          (f) RIGHTS OF OPTIONEES.  No Optionee  shall be deemed for any purpose
to be the owner of any shares of Common Stock  subject to any option  unless and
until (i) the  option  shall have been  exercised  with  respect to such  shares
pursuant  to the terms  thereof,  and (ii) the  Company  shall  have  issued and
delivered a certificate representing such shares.  Thereupon, the Optionee shall
have full  voting,  dividend  and other  ownership  rights with  respect to such
shares of Common Stock.

     5.2. CERTAIN OPTIONAL TERMS. The Plan  Administrator  may in its discretion
provide, upon the grant of any option hereunder,  that the Company shall have an
option to repurchase all or any number of shares purchased upon exercise of such
option.  The  repurchase  price per share  payable by the Company  shall be such
amount or be determined by such formula as is fixed by the Plan Administrator at
the time the option for the shares subject to repurchase  was granted.  The Plan
Administrator  may also  provide  that the  Company  shall have a right of first
refusal  with  respect  to the  transfer  or  proposed  transfer  of any  shares
purchased  upon exercise of an option granted  hereunder.  In the event the Plan
Administrator shall grant options subject to the Company's  repurchase rights or
rights of first refusal, the certificate or certificates representing the shares
purchased  pursuant  to the  exercise  of  such  option  shall  carry  a  legend
satisfactory to counsel for the Company referring to such rights.

SECTION 6.      METHOD OF EXERCISE; PAYMENT OF PURCHASE PRICE

     6.1. NOTICE OF EXERCISE. Any option granted under the Plan may be exercised
by the  Optionee  by  delivering  to the Company on any  business  day a written
notice  specifying the option being exercised and the number of shares of Common
Stock the Optionee then desires to purchase and  specifying the address to which
the  certificates  for such shares are to be mailed,  accompanied by payment for
such shares.

     6.2. MEANS OF PAYMENT AND DELIVERY.  Common Stock  purchased on exercise of
an option must be paid for as follows:  (a) in cash or by check  (acceptable  to
the Company in accordance  with guidelines  established for this purpose),  bank

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<PAGE>

draft or money  order  payable to the order of the  Company,  or (b) through the
delivery of shares of Common  Stock (which in the case of shares  acquired  from
the Company upon exercise of an option,  have been  outstanding for at least six
months)  having a fair market value on the last  business day preceding the date
of exercise equal to the purchase price, or (c) by delivery of an  unconditional
and  irrevocable  undertaking  by a broker to deliver  promptly  to the  Company
sufficient  funds  to pay the  exercise  price,  or (d) if so  permitted  by the
instrument  evidencing the option (or in the case of a Nonqualified  Option,  by
the Plan  Administrator  on or after  grant of the  option),  by  delivery  of a
promissory  note of the  Optionee to the  Company,  payable on such terms as are
specified  by  the  Plan  Administrator,  or  (e)  by  any  combination  of  the
permissible forms of payment;  PROVIDED, that if the Common Stock delivered upon
exercise of the option is an original issue of authorized Common Stock, at least
so much of the exercise  price as represents  the par value of such Common Stock
must be paid other than by the Optionee's  promissory note or personal check. In
the event that  payment of the  option  price is made under (b) above,  the Plan
Administrator  may provide  that the  Optionee be granted an  additional  option
covering the numbers of shares  surrendered,  at an exercise  price equal to the
fair market value of a share of Common Stock on the date of  surrender.  For the
purpose of this Section,  the fair market value of the shares of Common Stock so
delivered to the Company shall be determined in the manner  specified in Section
5.1(c)  hereof.  As  promptly  as  practicable  after  receipt  of such  written
notification and payment, the Company shall deliver to the Optionee certificates
for the  number  of  shares  with  respect  to  which  such  Option  has been so
exercised,  issued in the Optionee's name; provided, however, that such delivery
shall be deemed  effected for all purposes when the Company or a stock  transfer
agent of the Company shall have deposited such certificates in the United States
mail,  addressed to the Optionee,  at the address specified  pursuant to Section
6.1.

SECTION 7.      ADJUSTMENT UPON CHANGES IN CAPITALIZATION

      7.1  NO  EFFECT  OF  OPTIONS  UPON  CERTAIN  CORPORATE  TRANSACTIONS.  The
existence of outstanding  options shall not affect in any way the right or power
of the Company or its  stockholders to make or authorize any or all adjustments,
recapitalizations,  reorganizations  or other changes in the  Company's  capital
structure or its business, or any merger or consolidation of the Company, or any
issue of Common  Stock,  or any issue of bonds,  debentures,  preferred or prior
preference  stock ahead of or affecting the Common Stock or the rights  thereof,
or the dissolution or liquidation of the Company, or any sale or transfer of all
or any part of its assets or business, or any other corporate act or proceeding,
whether of a similar character or otherwise.

      7.2. STOCK DIVIDENDS, RECAPITALIZATIONS,  ETC. If the Company shall effect
a subdivision  or  consolidation  of shares or other capital  readjustment,  the
payment of a stock  dividend,  or other  increase or  reduction of the number of
shares of the Common Stock outstanding,  without receiving compensation therefor
in money, services or property,  then: (i) the number, class and per share price
of shares of stock subject to outstanding  options hereunder,  and the number of
shares as to which  automatic  formula  grants of  options  are to be made under
Section  4.4  above,  shall be  appropriately  adjusted  in such a manner  as to
entitle  an  Optionee  to  receive  upon  exercise  of an  option,  for the same
aggregate cash consideration, the same total number and class of shares that the
owner of an equal  number of  outstanding  shares of Common Stock would own as a
result of the event  requiring  the  adjustment;  the number and class of shares
with respect to which options may be granted under the Plan shall be adjusted by
substituting  for the total number of shares of Common  Stock then  reserved for
issuance  under the Plan that number and class of shares of stock that the owner
of an equal number of outstanding shares of Common Stock would own as the result
of the event requiring the adjustment.

      7.3. DETERMINATION OF ADJUSTMENTS.  Adjustments under this Section 7 shall
be  determined  by the  Plan  Administrator  and  such  determinations  shall be
conclusive.  The Plan  Administrator  shall have the discretion and power in any
such event to determine and to make effective  provision for acceleration of the
time or times at which any option or portion  thereof shall become  exercisable.
No  fractional  shares of Common Stock shall be issued under the Plan on account
of any adjustment specified above.

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<PAGE>

      7.4. NO  ADJUSTMENT IN CERTAIN  CASES.  Except as  hereinbefore  expressly
provided,  the  issue  by the  Company  of  shares  of stock  of any  class,  or
securities  convertible  into shares of stock of any class, for cash or property
or for labor or services, either upon direct sale or upon the exercise of rights
or warrants to subscribe  therefor,  or upon conversion of shares or obligations
of the  Company  convertible  into such  shares or other  securities,  shall not
affect,  and no adjustment by reason  thereof shall be made with respect to, the
number or price of shares of Common Stock then subject to outstanding options.

SECTION 8.      EFFECT OF CERTAIN TRANSACTIONS

      If the Company is a party to a  reorganization  or merger with one or more
other  corporations,  whether or not the Company is the  surviving  or resulting
corporation,  or if the  Company  consolidates  with or into  one or more  other
corporations,  or if the Company is liquidated or sells or otherwise disposes of
substantially  all  of its  assets  to  another  corporation  (each  hereinafter
referred to as a  "Transaction"),  in any such event while  unexercised  options
remain outstanding under the Plan, then: (i) subject to the provisions of clause
(iii) below,  after the effective date of such Transaction  unexercised  options
shall remain outstanding and shall be exercisable in shares of Common Stock, or,
if applicable, shares of such stock or other securities, cash or property as the
holders  of  shares  of  Common  Stock  received  pursuant  to the terms of such
Transaction; (ii) the Plan Administrator may accelerate the time for exercise of
all unexercised and unexpired options to and after a date prior to the effective
date of such Transaction;  or (iii) any outstanding  options may be cancelled by
the Plan  Administrator as of the effective date of such  Transaction,  provided
that:  (x)  notice  of such  cancellation  shall be given to each  holder  of an
option; (y) the Plan Administrator  shall have accelerated the time for exercise
of all  unexercised  and unexpired  options that it proposes to cancel;  and (z)
each holder of an option shall have the right to exercise such option in full.

SECTION 9.      AMENDMENT OR TERMINATION OF THE PLAN

      The Board may  terminate  the Plan at any time,  and may amend the Plan at
any time and from  time to time,  subject  to the  limitation  that,  except  as
provided in Sections 7 and 8 hereof,  no  amendment  shall be  effective  unless
approved by the  stockholders  of the Company in accordance  with applicable law
and  regulations,  at an annual or special  meeting  held within  twelve  months
before or after the date of adoption of such amendment, in any instance in which
such  amendment  would:  (i) increase the number of shares of Common Stock as to
which options may be granted  under the Plan;  or (ii) modify the  provisions of
Section 4 hereof relating to eligibility to receive  Incentive Options under the
Plan.

      Except as  provided  in  Sections 7 and 8 hereof,  rights and  obligations
under any option granted  before  termination or amendment of the Plan shall not
be altered or impaired by such  termination or amendment except with the consent
of the Optionee.

SECTION 10.     NON-EXCLUSIVITY OF THE PLAN; NON-UNIFORM DETERMINATIONS

      Neither the adoption of the Plan by the Board nor the approval of the Plan
by  the  stockholders  of  the  Company  shall  be  construed  as  creating  any
limitations on the power of the Board to adopt such other incentive arrangements
as it may deem  desirable,  including  without  limitation the granting of stock
options  otherwise  than  under the Plan,  and such  arrangements  may be either
applicable generally or only in specific cases.

      The Plan Administrator's determinations under the Plan need not be uniform
and may be made by it  selectively  among persons who receive or are eligible to
receive  options  under the Plan  (whether  or not such  persons  are  similarly
situated).   Without  limiting  the  generality  of  the  foregoing,   the  Plan
Administrator  shall be entitled,  among other things,  to make  non-uniform and
selective  determinations,  and to enter into  non-uniform and selective  option
agreements,  as to (i) the persons to receive  options under the Plan,  (ii) the

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<PAGE>

terms and provisions of options, (iii) the exercise by the Plan Administrator of
its  discretion  in respect of the exercise of options  pursuant to the terms of
the Plan, and (iv) the treatment of leaves of absence pursuant to Section 5.1(e)
hereof.

SECTION 11.   GOVERNMENT AND OTHER REGULATIONS; GOVERNING LAW; WITHHOLDING TAXES

      The  obligation of the Company to sell and deliver  shares of Common Stock
with  respect  to  options  granted  under  the  Plan  shall be  subject  to all
applicable  laws, rules and  regulations,  including all applicable  federal and
state  securities  laws,  and the obtaining of all such  approvals by government
agencies as may be deemed  necessary or appropriate  by the Plan  Administrator.
All shares sold under the Plan shall bear appropriate  legends. The Company may,
but shall in no event be obligated to, register or qualify any shares covered by
options under  applicable  federal and state  securities  laws; and in the event
that any shares are so registered or qualified the Company may remove any legend
on certificates  representing such shares. The Company shall not be obligated to
take any other affirmative action in order to cause the exercise of an option or
the issuance of shares pursuant  thereto to comply with any law or regulation of
any  governmental  authority.  The Plan shall be  governed by and  construed  in
accordance with the laws of The Commonwealth of Massachusetts.

      Whenever  under the Plan shares are to be  delivered  upon  exercise of an
option, the Company shall be entitled to require as a condition of delivery that
the Optionee remit an amount sufficient to satisfy all federal,  state and other
governmental withholding tax requirements related thereto. An employee may elect
to have such tax withholding obligation satisfied,  in whole or in part, by: (i)
authorizing  the  Company to withhold  from shares of Common  Stock to be issued
pursuant  to the  exercise of a  Nonqualified  Option a number of shares with an
aggregate fair market value (as defined in Section  5.1(c) hereof  determined as
of the date the  withholding  is effected)  that would  satisfy the  withholding
amount due with respect to such exercise;  or (ii)  transferring  to the Company
shares of Common Stock owned by the employee with an aggregate fair market value
(as defined in Section 5.1(c) hereof  determined as of the date the  withholding
is effected) that would satisfy the withholding  amount due. With respect to any
employee  who is  subject  to  Section 16 of the  Exchange  Act,  the  following
additional restrictions shall apply:

            (a) the election to satisfy tax withholding  obligations relating to
an option exercise in the manner  permitted by Section 11(i) above shall be made
either (1) during the period  beginning on the third  business day following the
date of release of quarterly or annual summary  statements of sales and earnings
of the Company and ending on the twelfth business day following such date or (2)
at least six months prior to the date of exercise of the option;

            (b) such election shall be irrevocable;

            (c) such election shall be subject to the consent or approval of the
Plan Administrator; and

            (d) the Common Stock withheld to satisfy tax withholding, if granted
at the discretion of the Plan Administrator, must pertain to an option which has
been held by the  employee for at least six months from the date of grant of the
option.

SECTION 12.     "LOCKUP" AGREEMENT

      The Plan  Administrator  may in its  discretion  specify upon  granting an
option that the Optionee  shall  agree,  for a period of time (not to exceed 180
days) from the effective date of any  registration of securities of the Company,
upon  request of the Company or the  underwriter  or  underwriters  managing any
underwritten offering of the Company's  securities,  not to sell, make any short
sale of, loan, grant any option for the purchase of, or otherwise dispose of any
shares issued pursuant to the exercise of such option, without the prior written
consent of the Company or such underwriter or underwriters, as the case may be.

                                       36
<PAGE>

SECTION 13.     EFFECTIVE DATE AND DURATION OF PLAN

      The Plan shall become  effective  upon its adoption by the Board  provided
that the  stockholders of the Company shall have approved the Plan within twelve
months  prior to or following  the adoption of the Plan by the Board.  No option
may be granted under the Plan after the tenth anniversary of the effective date.
The Plan shall  terminate (i) when the total amount of the Stock with respect to
which options may be granted shall have been issued upon the exercise of options
or (ii) by action of the Board  pursuant  to Section 9 hereof,  whichever  shall
first occur.









                                       37
<PAGE>

                      THIS PROXY IS SOLICITED ON BEHALF OF
                  THE BOARD OF DIRECTORS OF EXCELON CORPORATION
                A STOCKHOLDER WISHING TO VOTE IN ACCORDANCE WITH
                  THE RECOMMENDATIONS OF THE BOARD OF DIRECTORS
               NEED ONLY SIGN AND DATE THIS PROXY AND RETURN IT IN
                             THE ENCLOSED ENVELOPE.

                Please complete and return the proxy card below.

                                   DETACH HERE


                                      PROXY

                               EXCELON CORPORATION

                    PROXY FOR ANNUAL MEETING OF STOCKHOLDERS
                           TO BE HELD ON MAY 24, 2000

The undersigned stockholder of eXcelon Corporation (the "Company"), revoking all
prior proxies,  hereby appoints Robert N. Goldman and Lacey P. Brandt, or either
of them acting singly,  proxies,  with full power of  substitution,  to vote all
shares of capital stock of the Company which the undersigned is entitled to vote
at the Annual meeting of  Stockholders to be held at the offices of the Company,
25 Mall Road,  Burlington,  Massachusetts  01803,  on  Wednesday,  May 24, 2000,
beginning  at 10:00 a.m.,  local time,  and at any  adjournments  thereof,  upon
matters set forth in the Notice of Annual  Meeting  dated April 24, 2000 and the
related Proxy Statement,  copies of which have been received by the undersigned,
and in their  discretion  upon any business  that may  properly  come before the
Annual Meeting or any adjournments thereof. Attendance of the undersigned at the
Annual  Meeting or any  adjournment  thereof  will not be deemed to revoke  this
proxy unless the undersigned shall  affirmatively  indicate the intention of the
undersigned  to vote  the  shares  represented  hereby  in  person  prior to the
exercise of this proxy.

    THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS DIRECTED OR, IF NO
 DIRECTION IS GIVEN WITH RESPECT TO THE PROPOSALS SET FORTH ON THE REVERSE SIDE,
      WILL BE VOTED FOR SUCH PROPOSALS OR OTHERWISE IN ACCORDANCE WITH THE
                    RECOMMENDATION OF THE BOARD OF DIRECTORS.


                   CONTINUED AND TO BE SIGNED ON REVERSE SIDE

<PAGE>

                                  DETACH HERE

[x] Please mark
    votes as in
    this example.


1. Proposal to elect the following nominee as a Class I Director of the Company:

      Nominee:  Gerald B. Bay

             FOR            WITHHOLD
            NOMINEE
              [ ]              [ ]


2. Proposal to approve the amendment              FOR       AGAINST      ABSTAIN
   of the Company's 1996 Employee                 [ ]         [ ]          [ ]
   Stock Purchase Plan to increase the
   number of shares available for grant
   thereunder by 200,000.

3. Proposal to approve the amendment              FOR       AGAINST      ABSTAIN
   of the Company's 1996 Incentive and            [ ]         [ ]          [ ]
   Nonqualified Stock Option Plan
   to increase the number of shares available
   for issue thereunder by 1,000,000.


                               MARK HERE FOR ADDRESS CHANGE AND NOTE AT LEFT [ ]

                               Please promptly date and sign this proxy and mail
                               it   in   the   enclosed   envelope   to   assure
                               representation of your shares. No postage need be
                               affixed if mailed in the United States.

                               Please sign exactly as name(s) appear(s) on stock
                               certificate. If shares are held by joint tenants,
                               both   should   sign.   If   stockholder   is   a
                               corporation,  please sign full  corporate name by
                               president or other  authorized  officer and, if a
                               partnership, please sign full partnership name by
                               an authorized partner or other authorized person.
                               If signing as attorney, executor,  administrator,
                               trustee or  guardian,  please  give full title as
                               such.


       Signature: _______________________ Date: _________________________


       Signature: ________________________Date: _________________________




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