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                                                                     Exhibit 4.8

                                OPEN MARKET, INC.

                            1999 STOCK INCENTIVE PLAN
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1.       Purpose
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The purpose of this 1999 Stock Incentive Plan (the "Plan") of Open Market, Inc.,
a Delaware corporation (the "Company"), is to advance the interests of the
Company's stockholders by enhancing the Company's ability to attract, retain and
motivate persons who make (or are expected to make) important contributions to
the Company by providing such persons with equity ownership opportunities and
performance-based incentives and thereby better aligning the interests of such
persons with those of the Company's stockholders. Except where the context
otherwise requires, the term "Company" shall include any of the Company's
present or future subsidiary corporations as defined in Section 424(f) of the
Internal Revenue Code of 1986, as amended, and any regulations promulgated
thereunder (the "Code") and any other business venture (including, without
limitation, joint venture or limited liability company) in which the Company has
a significant interest, as determined by the Board of Directors of the Company
(the "Board").

2.       Eligibility
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All of the Company's employees, officers, directors, consultants and advisors
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(and any individuals who have accepted an offer for employment) are eligible to
be granted options or restricted stock awards (each, an "Award") under the Plan.
Each person who has been granted an Award under the Plan shall be deemed a
"Participant".

3.       Administration, Delegation
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         (a) Administration by Board of Directors. The Plan will be administered
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by the Board. The Board shall have authority to grant Awards and to adopt, amend
and repeal such administrative rules, guidelines and practices relating to the
Plan as it shall deem advisable. The Board may correct any defect, supply any
omission or reconcile any inconsistency in the Plan or any Award in the manner
and to the extent it shall deem expedient to carry the Plan into effect and it
shall be the sole and final judge of such expediency. All decisions by the Board
shall be made in the Board's sole discretion and shall be final and binding on
all persons having or claiming any interest in the Plan or in any Award. No
director or person acting pursuant to the authority delegated by the Board shall
be liable for any action or determination relating to or under the Plan made in
good faith.

         (b) Delegation to Executive Officers. To the extent permitted by
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applicable law, the Board may delegate to one or more executive officers of the
Company the power to make Awards and exercise such other powers under the Plan
as the Board may determine, provided that the Board shall fix the maximum number
of shares subject to Awards and the maximum number of shares for any one
Participant to be made by such executive officers.

         (c) Appointment of Committees. To the extent permitted by applicable
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law, the Board may delegate any or all of its powers under the Plan to one or
more committees or

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subcommittees of the Board (a "Committee"). All references in the Plan to the
"Board" shall mean the Board or a Committee of the Board or the executive
officer referred to in Section 3(b) to the extent that the Board's powers or
authority under the Plan have been delegated to such Committee or executive
officer.

4.       Stock Available for Awards
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         (a)      Number of Shares. Subject to adjustment under Section 7,
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Awards may be made under the Plan for up to 4,000,000 shares of common stock,
$.001 par value per share, of the Company (the "Common Stock"). If any Award
expires or is terminated, surrendered or canceled without having been fully
exercised or is forfeited in whole or in part or results in any Common Stock not
being issued, the unused Common Stock covered by such Award shall again be
available for the grant of Awards under the Plan, subject, however, in the case
of Incentive Stock Options (as hereinafter defined), to any limitation required
under the Code. Shares issued under the Plan may consist in whole or in part of
authorized but unissued shares or treasury shares.

         (b)      Per-Participant Limit. Subject to adjustment under Section 7,
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for Awards granted after the Common Stock is registered under the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), the maximum number of
shares of Common Stock with respect to which Awards may be granted to any
Participant under the Plan shall be 1,000,000 per calendar year. The
per-Participant limit described in this Section 4(b) shall be construed and
applied consistently with Section 162(m) of the Code ("Section 162(m)").

5.       Stock Options
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         (a)      General. The Board may grant options to purchase Common Stock
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(each, an "Option") and determine the number of shares of Common Stock to be
covered by each Option, the exercise price of each Option and the conditions and
limitations applicable to the exercise of each Option, including conditions
relating to applicable federal or state securities laws, as it considers
necessary or advisable. An Option which is not intended to be an Incentive Stock
Option (as hereinafter defined) shall be designated a "Non-statutory Stock
Option".


         (b)      Incentive Stock Options. An Option that the Board intends to
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be an "incentive stock option" as defined in Section 422 of the Code (an
"Incentive Stock Option") shall only be granted to employees of the Company and
shall be subject to and shall be construed consistently with the requirements of
Section 422 of the Code. The Company shall have no liability to a Participant,
or any other party, if an Option (or any part thereof) which is intended to be
an Incentive Stock Option is not an Incentive Stock Option.

         (c)      Exercise Price. The Board shall establish the exercise price
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at the time each Option is granted and specify it in the applicable option
agreement.

         (d)      Duration of Options. Each Option shall be exercisable at such
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times and subject to such terms and conditions as the Board may specify in the
applicable option agreement provided, however, that no Option will be granted
for a term in excess of 10 years.

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         (e)      Exercise of Option. Options may be exercised by delivery to
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the Company of a written notice of exercise signed by the proper person or by
any other form of notice (including electronic notice) approved by the Board
together with payment in full as specified in Section 5(f) for the number of
shares for which the Option is exercised.

         (f)      Payment Upon Exercise.  Common Stock purchased upon the
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exercise of an Option granted under the Plan shall be paid for as follows:

                  (1) in cash or by check, payable to the order of the Company;

                  (2) except as the Board may, in its sole discretion, otherwise
provide in an option agreement, by (i) delivery of an irrevocable and
unconditional undertaking by a creditworthy broker to deliver promptly to the
Company sufficient funds to pay the exercise price or (ii) delivery by the
Participant to the Company of a copy of irrevocable and unconditional
instructions to a creditworthy broker to deliver promptly to the Company cash or
a check sufficient to pay the exercise price;

                  (3) when the Common Stock is registered under the Exchange
Act, by delivery of shares of Common Stock owned by the Participant valued at
their fair market value as determined by (or in a manner approved by) the Board
in good faith ("Fair Market Value"), provided (i) such method of payment is then
permitted under applicable law and (ii) such Common Stock was owned by the
Participant at least six months prior to such delivery;

                  (4) to the extent permitted by the Board, in its sole
discretion by (i) delivery of a promissory note of the Participant to the
Company on terms determined by the Board, or (ii) payment of such other lawful
consideration as the Board may determine; or

                  (5) by any combination of the above permitted forms of
payment.

                  6.  Restricted Stock

         (a)      Grants. The Board may grant Awards entitling recipients to
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acquire shares of Common Stock, subject to the right of the Company to
repurchase all or part of such shares at their issue price or other stated or
formula price (or to require forfeiture of such shares if issued at no cost)
from the recipient in the event that conditions specified by the Board in the
applicable Award are not satisfied prior to the end of the applicable
restriction period or periods established by the Board for such Award (each, a
"Restricted Stock Award").

         (b)      Terms and Conditions. The Board shall determine the terms and
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conditions of any such Restricted Stock Award, including the conditions for
repurchase (or forfeiture) and the issue price, if any. Any stock certificates
issued in respect of a Restricted Stock Award shall be registered in the name of
the Participant and, unless otherwise determined by the Board, deposited by the
Participant, together with a stock power endorsed in blank, with the Company (or
its designee). At the expiration of the applicable restriction periods, the
Company (or such designee) shall deliver the certificates no longer subject to
such restrictions to the Participant or if the Participant has died, to the
beneficiary designated, in a manner determined by the Board, by a Participant to
receive amounts due or exercise rights of the Participant in the event of the

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Participant's death (the "Designated Beneficiary"). In the absence of an
effective designation by a Participant, Designated Beneficiary shall mean the
Participant's estate.

         7.       Adjustments for Changes in Common Stock and Certain Other
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Events
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         (a)      Changes in Capitalization. In the event of any stock split,
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reverse stock split, stock dividend, recapitalization, combination of shares,
reclassification of shares, spin-off or other similar change in capitalization
or event, or any distribution to holders of Common Stock other than a normal
cash dividend, (i) the number and class of securities available under this Plan,
(ii) the per-Participant limit set forth in Section 4(b), (iii) the number and
class of securities and exercise price per share subject to each outstanding
Option and (iv) the repurchase price per share subject to each outstanding
Restricted Stock Award, shall be appropriately adjusted by the Company (or
substituted Awards may be made, if applicable) to the extent the Board shall
determine, in good faith, that such an adjustment (or substitution) is necessary
and appropriate. If this Section 7(a) applies and Section 7(c) also applies to
any event, Section 7(c) shall be applicable to such event, and this Section 7(a)
shall not be applicable.

         (b)      Liquidation or Dissolution. In the event of a proposed
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liquidation or dissolution of the Company, the Board shall upon written notice
to the Participants provide that all then unexercised Options will (i) become
exercisable in full as of a specified time at least 10 business days prior to
the effective date of such liquidation or dissolution and (ii) terminate
effective upon such liquidation or dissolution, except to the extent exercised
before such effective date. The Board may specify the effect of a liquidation or
dissolution on any Restricted Stock Award granted under the Plan at the time of
the grant of such Award.

         (c)      Acquisition Events
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                  (1) Definition. An "Acquisition Event" shall mean: (a) any
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merger or consolidation of the Company with or into another entity as a result
of which the Common Stock is converted into or exchanged for the right to
receive cash, securities or other property or (b) any exchange of shares of the
Company for cash, securities or other property pursuant to a statutory share
exchange transaction.

                  (2) Consequences of an Acquisition Event on Options. Upon the
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occurrence of an Acquisition Event, or the execution by the Company of any
agreement with respect to an Acquisition Event, the Board shall provide that all
outstanding Options shall be assumed, or equivalent options shall be
substituted, by the acquiring or succeeding corporation (or an affiliate
thereof). For purposes hereof, an Option shall be considered to be assumed if,
following consummation of the Acquisition Event, the Option confers the right to
purchase, for each share of Common Stock subject to the Option immediately prior
to the consummation of the Acquisition Event, the consideration (whether cash,
securities or other property) received as a result of the Acquisition Event by
holders of Common Stock for each share of Common Stock held immediately prior to
the consummation of the Acquisition Event (and if holders were offered a choice
of consideration, the type of consideration chosen by the holders of a majority
of the outstanding shares of Common Stock); provided, however, that if the
consideration received as a result of the Acquisition Event is not solely common
stock of the acquiring or succeeding corporation (or an affiliate thereof), the
Company may, with the consent of the

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acquiring or succeeding corporation, provide for the consideration to be
received upon the exercise of Options to consist solely of common stock of the
acquiring or succeeding corporation (or an affiliate thereof) equivalent in fair
market value to the per share consideration received by holders of outstanding
shares of Common Stock as a result of the Acquisition Event.

                      Notwithstanding the foregoing, if the acquiring or
succeeding corporation (or an affiliate thereof) does not agree to assume, or
substitute for, such Options, then the Board shall, upon written notice to the
Participants, provide that all then unexercised Options will become exercisable
in full as of a specified time prior to the Acquisition Event and will terminate
immediately prior to the consummation of such Acquisition Event, except to the
extent exercised by the Participants before the consummation of such Acquisition
Event; provided, however, that in the event of an Acquisition Event under the
terms of which holders of Common Stock will receive upon consummation thereof a
cash payment for each share of Common Stock surrendered pursuant to such
Acquisition Event (the "Acquisition Price"), then the Board may instead provide
that all outstanding Options shall terminate upon consummation of such
Acquisition Event and that each Participant shall receive, in exchange therefor,
a cash payment equal to the amount (if any) by which (A) the Acquisition Price
multiplied by the number of shares of Common Stock subject to such outstanding
Options (whether or not then exercisable), exceeds (B) the aggregate exercise
price of such Options.

                  (3) Consequences of an Acquisition Event on Restricted Stock
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Awards. Upon the occurrence of an Acquisition Event, the repurchase and other
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rights of the Company under each outstanding Restricted Stock Award shall inure
to the benefit of the Company's successor and shall apply to the cash,
securities or other property which the Common Stock was converted into or
exchanged for pursuant to such Acquisition Event in the same manner and to the
same extent as they applied to the Common Stock subject to such Restricted Stock
Award.

8.       General Provisions Applicable to Awards
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         (a)      Transferability of Awards. Except as the Board may otherwise
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determine or provide in an Award, Awards shall not be sold, assigned,
transferred, pledged or otherwise encumbered by the person to whom they are
granted, either voluntarily or by operation of law, except by will or the laws
of descent and distribution, and, during the life of the Participant, shall be
exercisable only by the Participant. References to a Participant, to the extent
relevant in the context, shall include references to authorized transferees.

         (b)      Documentation. Each Award shall be evidenced by a written
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instrument in such form as the Board shall determine. Each Award may contain
terms and conditions in addition to those set forth in the Plan.

         (c)      Board Discretion.  Except as otherwise provided by the Plan,
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each Award may be made alone or in addition or in relation to any other Award.
The terms of each Award need not be identical, and the Board need not treat
Participants uniformly.

         (d)      Termination of Status. The Board shall determine the effect on
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an Award of the disability, death, retirement, authorized leave of absence or
other change in the employment or other status of a Participant and the extent
to which, and the period during which, the Participant,

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shares of Common Stock to be distributed with respect to an Award until becoming
the record holder of such shares. Notwithstanding the foregoing, in the event
the Company effects a split of the Common Stock by means of a stock dividend and
the exercise price of and the number of shares subject to such Option are
adjusted as of the date of the distribution of the dividend (rather than as of
the record date for such dividend), then an optionee who exercises an Option
between the record date and the distribution date for such stock dividend shall
be entitled to receive, on the distribution date, the stock dividend with
respect to the shares of Common Stock acquired upon such Option exercise,
notwithstanding the fact that such shares were not outstanding as of the close
of business on the record date for such stock dividend.

         (c)      Effective Date and Term of Plan. The Plan shall become
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effective on the date on which it is adopted by the Board, but no Award granted
to a Participant that is intended to comply with Section 162(m) shall become
exercisable, vested or realizable, as applicable to such Award, unless and until
the Plan has been approved by the Company's stockholders to the extent
stockholder approval is required by Section 162(m) in the manner required under
Section 162(m) (including the vote required under Section 162(m)). No Awards
shall be granted under the Plan after the completion of ten years from the
earlier of (i) the date on which the Plan was adopted by the Board or (ii) the
date the Plan was approved by the Company's stockholders, but Awards previously
granted may extend beyond that date.

         (d)      Amendment of Plan. The Board may amend, suspend or terminate
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the Plan or any portion thereof at any time, provided that to the extent
required by Section 162(m), no Award granted to a Participant that is intended
to comply with Section 162(m) after the date of such amendment shall become
exercisable, realizable or vested, as applicable to such Award, unless and until
such amendment shall have been approved by the Company's stockholders as
required by Section 162(m) (including the vote required under Section 162(m)).

         (e)      Governing Law.  The provisions of the Plan and all Awards made
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hereunder shall be governed by and interpreted in accordance with the laws of
the Commonwealth of Massachusetts, without regard to any applicable conflicts of
law.

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