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                             STOCK OPTION AGREEMENT
                                AUTHORISZOR INC.

         This unilateral grant by the Company (as hereinafter defined)
constitutes a valid Nonqualified Stock Option (the "Option") for a total of
100,000 shares (the "Shares") of common stock, par value $.01 per share (the
"Common Stock"), of AUTHORISZOR INC., a Delaware corporation (the "Company")
whose principal executive offices are situated at 8201 Preston Road, Suite 600,
Dallas, Texas 75225, is hereby granted to RICHARD A. LANGEVIN (the "Optionee")
pursuant to an Executive Employment Agreement dated as of January 1, 2000
between the Company and the Optionee (the "Employment Agreement") and pursuant
to the terms of this Option Agreement (the "Option Agreement").

         SECTION 1. EXERCISE PRICE. The exercise price of the Option is $6.75
for each Share.

         SECTION 2. EXERCISE OF THE OPTION. This Option may be exercised on
January 1, 2003 and from time to time thereafter, subject to the provisions
contained in SECTIONS 3 AND 4 below.

               (a)  METHOD OF EXERCISE. Options shall be deemed properly
         exercised when:

                    (i)   the Company has received written notice of such
               exercise, stating the number of Shares which are being purchased,
               delivered to the Company and signed by the person or persons
               entitled to exercise the Option and, if the Option is being
               exercised by any person or persons other than the Optionee, be
               accompanied by proof, satisfactory to the Company, of the right
               of such person or persons to exercise the Option;

                    (ii)  full payment of the exercise price of the Shares
               as to which the Option is exercised has been tendered to the
               Company; and

                    (iii) arrangements that are satisfactory to the Board of
               Directors of the Company (the "Board") in its sole discretion
               have been made for the Optionee's payment to the Company of the
               amount, if any, that the Company determines to be necessary for
               the Company to withhold in accordance with applicable federal or
               state income, or federal employment, tax withholding
               requirements.

               (b)  PAYMENT. The exercise price of any Shares purchased shall
         be paid in cash, by certified or cashier's check, by money order or by
         personal check (if approved by the Board); PROVIDED, FURTHER, that any
         federal or state income, or federal employment, taxes which the Company
         determines should be withheld, shall be paid by the Optionee to the
         Company in cash, by certified or cashier's check, by money order or by
         personal check (if approved by the Board).

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               (c)  RESTRICTIONS ON EXERCISE.

                    (i)   This Option may not be exercised if the issuance
               of the Shares upon such exercise would constitute a violation
               of any applicable federal or state securities or other law or
               valid regulation. As a condition to the exercise of this Option,
               the Company may require the exercising person to make any
               agreements and undertakings that may be required by any
               applicable law or regulation.

                    (ii)  Shares issued upon the exercise of this Option
               without registration of such Shares under the Securities Act of
               1933, as amended (the "Securities Act"), shall be restricted
               securities subject to the terms of Rule 144 under the Securities
               Act. The certificates representing any such Shares shall bear
               an appropriate legend restricting transfer and the transfer agent
               of the Company shall be given stop transfer instructions with
               respect to such Shares.

                    (iii) At the request of the Optionee, the Company will file
               a Registration Statement on Form S-8 registering the issuance of
               the Shares; PROVIDED THAT the Company meets the requirements of
               Form S-8.

         SECTION 3.  TERM OF OPTION. This Option may not be exercised after
December 31, 2009 and is subject to earlier termination as provided in SECTION
4. In addition, this Option is subject to cancellation by the Company upon a
significant corporate event as provided in SECTION 4 below. This Option may be
exercised during such times only in accordance with the terms of this Option
Agreement.

         SECTION 4.  TERMINATION OF OPTION PERIOD.

               The unexercised portion of this Option shall automatically and
         without notice terminate and become null and void at the time of the
         earliest to occur of the following:

                    (a) upon the date the Company terminates the Employment
               Agreement for "Cause" pursuant to the terms of Paragraph 25 of
               the Employment Agreement;

                    (b) upon the date on which the Optionee becomes physically
               or mentally disabled, as defined by 29 C.F.R. Section
               1630.2(g)(1), and cannot perform the essential functions of his
               position, with reasonable accommodation;

                    (c) upon the date of the death of the Optionee; or

                    (d) December 31, 2009.

         SECTION 5.  ACCELERATION OF OPTION PERIOD.

               Upon the occurrence of either of the events described in
         Section 5(a) or 5(b), the Option shall automatically vest in full and
         become immediately exercisable.


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                    (a)  a Sale of the Company, as defined in Paragraph 3 of
               the Employment Agreement; or

                    (b)  termination of the Optionee by the Company without
               cause under Paragraph 24 of the Employment Agreement.

         SECTION 6.  ADJUSTMENT OF SHARES.

               (a)   If at any time while an unexercised Option is outstanding
         hereunder, there shall be any increase or decrease in the number of
         issued and outstanding shares of Common Stock through the declaration
         of a stock dividend or through any recapitalization resulting in a
         stock split-up, combination or exchange of shares, then and in such
         event proportionate adjustment shall be made in the number of Shares
         and the exercise price per Share thereof then subject to this Option,
         so that the same proportion of the Company's issued and outstanding
         shares shall remain subject to purchase at the same aggregate exercise
         price.

               (b)   Except as otherwise expressly provided herein, the
         issuance by the Company of shares of its capital stock of any class, or
         securities convertible into shares of capital stock of any class,
         either in connection with 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 of or exercise price of Shares then
         subject to this Option.

               (c)   Without limiting the generality of the foregoing, the
         existence of this Option shall not affect in any manner the right or
         power of the Company to make, authorize or consummate (i) any or all
         adjustments, recapitalizations, reorganizations or other changes in the
         Company's capital structure or its business; (ii) any merger or
         consolidation of the Company; (iii) any issue by the Company of debt
         securities, or preferred or preference stock that would rank above the
         Shares subject to this Option; (iv) the dissolution or liquidation of
         the Company; (v) any sale, transfer or assignment of all or any part of
         the assets or business of the Company; or (vi) any other corporate act
         or proceeding, whether of a similar character or otherwise.

         SECTION 7.  MARKET STAND OFF PERIOD. Optionee hereby agrees that, if so
requested by the Company or any representative of the underwriters in connection
with any registration of the offering (the "Offering") of any securities of the
Company under the Securities Act, Optionee shall not sell or otherwise transfer
any of the Shares or other securities of the Company during the 180-day period
(or such other period as may be requested in writing by the managing underwriter
with respect to the Offering and agreed to by the Company) (the "Market Standoff
Period") following the effective date of a registration statement of the Company
filed under the Securities Act. Such restriction shall apply only to the first
registration statement of the Company to become effective under the Securities
Act that includes securities to be sold on behalf of the Company to the public
in an underwritten public offering under the Securities Act. The Company may
impose stop-transfer


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<PAGE>

instructions with respect to securities subject to the foregoing restrictions
until the end of such Market Standoff Period.

         SECTION 8. NON-ASSIGNABILITY OF OPTION. This Option may be transferred
or assigned by the Optionee only to family members, trusts or other entities for
the benefit of the Optionee or for the benefit of the Optionee's family members,
by will or by the laws of descent and distribution or by the laws regulating
testate or intestate succession applicable to the Optionee.

         SECTION 9. ISSUANCE OF SHARES. No person shall be, or have any rights
or privileges of, a stockholder of the Company with respect to any of the Shares
subject to this Option unless and until certificates representing such Shares
have been issued and delivered to such person. As a condition of an issuance of
a stock certificate for Shares, the Company may obtain such agreements or
undertakings, if any, as it may deem necessary or advisable to assure compliance
with any provision of this Option Agreement or any law or regulation, including,
but not limited to, the following:

               (a)  The Optionee's representation and warranty to the Company,
         at the time the Option is exercised, that the Shares to be issued are
         being acquired for investment and not with a view to, or for sale in
         connection with, the distribution of any such Shares; and

               (b)  The Optionee's representation, warranty or agreement to be
         bound by any legends that are, in the opinion of the Company, necessary
         or appropriate to comply with the provisions of any securities law
         deemed by the Company to be applicable to the issuance of the Shares
         and to be endorsed upon the certificates representing the Shares.

         SECTION 10.  ADMINISTRATION OF THIS OPTION.

               (a)  The determinations and the interpretation and construction
         of any provision of this Option by the Company shall be final and
         conclusive.

               (b)  Subject to the express provisions of this Option, the
         Company shall have the authority, in its sole and absolute discretion,
         to adopt, amend, and rescind administrative and interpretive rules and
         regulations relating to this Option and to perform all other acts
         necessary or advisable for administering this Option, including the
         delegation of such ministerial acts and responsibilities as the Company
         deems appropriate.

         SECTION 11.  GOVERNMENT REGULATIONS. The granting and exercise of this
Option and the obligation of the Company to sell and deliver Shares under this
Option, shall be subject to all applicable laws, rules and regulations, and to
such approvals by any governmental agencies or national securities exchanges as
may be required.

         SECTION 12.  LAW GOVERNING. THIS OPTION IS INTENDED TO BE PERFORMED IN
THE STATE OF DELAWARE AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH AND
GOVERNED BY THE LAWS OF SUCH STATE EXCEPT TO THE EXTENT DELAWARE LAW IS
PREEMPTED BY FEDERAL LAW.


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         SECTION 13. NOTICES. Whenever any notice is required or permitted under
this Option Agreement, such notice must be in writing and personally delivered
or sent by mail or delivery by a recognized courier service. Any notice required
or permitted to be delivered under this Option Agreement shall be deemed to be
delivered on the date on which it is personally delivered, or, if mailed,
whether actually received or not, on the third business day after it is
deposited in the mail, certified or registered, postage prepaid, addressed to
the person who is to receive it at the address that such person has
previously specified by written notice delivered in accordance with this
subsection. The Company or the Optionee may change, at any time and from time
to time, by written notice to the other, an address, or in the case of
Optionee the name and address of his counsel, that was previously specified
for receiving notices. Until changed in accordance with this Option
Agreement, the Company and the Optionee shall specify as its or his address
for receiving notices the address set forth in this Option Agreement
pertaining to the Shares to which such notice relates.

         SECTION 14.  MISCELLANEOUS.

               (a)  The Company has full corporate authority to grant this
         Option, and this Option is granted to the Optionee in implementation of
         the Employment Agreement describing such Option and is in addition to
         any other stock option plans of the Company or other benefits with
         respect to the Optionee's position with or relationship to the Company
         or its subsidiaries. This Option shall not confer upon the Optionee the
         right to continue as an employee, director, consultant or advisor, or
         interfere in any way with the rights of the Company to terminate the
         Optionee's status as an employee, director, consultant or advisor.

               (b)  The members of the Board shall not be liable for any act,
         omission or determination taken or made in good faith with respect to
         this Option, and members of the Board shall, in addition to all other
         rights of indemnification and reimbursement, be entitled to
         indemnification and reimbursement by the Company in respect of any
         claim, loss, damage, liability or expense (including attorneys' fees,
         the costs of settling any suit, provided such settlement is approved by
         independent legal counsel selected by the Company, and amounts paid in
         satisfaction of a judgment, except a judgment based on a finding of bad
         faith) arising from such claim, loss, damage, liability or expense to
         the full extent permitted by law and under any directors' and officers'
         liability or similar insurance coverage that may from time to time be
         in effect.

               (c)  Any issuance or transfer of Shares to the Optionee, or to
         the Optionee's legal representative, heir, legatee, or distributee, in
         accordance with the provisions of this Option, shall, to the extent
         thereof, be in full satisfaction of all claims of such persons under
         this Option. The Company may require the Optionee, or any legal
         representative, heir, legatee or distributee as a condition precedent
         to such payment or issuance or transfer of Shares, to execute a release
         and receipt for such payment or issuance or transfer of Shares in such
         form as it shall determine.

               (d)  Neither the Board nor the Company guarantees Shares from
         loss or depreciation.


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<PAGE>

               (e)  All expenses incident to the administration, termination,
         or protection of this Option, including, but not limited to, legal and
         accounting fees, shall be paid by the Company; provided, however, the
         Company may recover any and all damages, fees, expenses and costs
         arising out of any actions taken by the Company to enforce its rights
         under this Option.

               (f)  Records of the Company shall be conclusive for all purposes
         under this Option, unless determined by the Board to be incorrect.

               (g)  Any action required of the Company relating to this Option
         shall be by resolution of the Board or by a person authorized to act by
         resolution of the Board.

               (h)  If any provision of this Option is held to be illegal or
         invalid for any reason, the illegality or invalidity shall not affect
         the remaining provisions of this Option, but such provision shall be
         fully severable, and this Option shall be construed and enforced as if
         the illegal or invalid provision had never been included in this
         Option.

               (i)  Any person entitled to notice under this Option may waive
         such notice.

               (j)  This Option shall be binding upon the Optionee, his legal
         representatives, heirs, legatees and distributees upon the Company, its
         successors, and assigns, and upon the Board and its successors.

               (k)  The titles and headings of Sections are included for
         convenience of reference only and are not to be considered in
         construction of this Option's provisions.

               (l)  Words used in the masculine shall apply to the feminine
         where applicable, and wherever the context of this Option dictates, the
         plural shall be read as the singular and the singular as the plural.


DATE OF GRANT:                         AUTHORISZOR INC.

JANUARY 1, 2000
                                       By:
                                          -----------------------------------
                                          JAMES L. JACKSON
                                          VICE PRESIDENT

ADDRESS:

Windsor House
Cornwall Road
Harrogate, North Yorkshire
United Kingdom
HG1 2PW


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<PAGE>


         Optionee hereby accepts this Option subject to all the terms and
provisions of this Option Agreement.


                                       By:
                                          -----------------------------------
                                          RICHARD A. LANGEVIN


ADDRESS:

1 Justin Road
Natick, MA 01760-5565

COUNSEL:

Jarvis P. Kellogg, Esq.
Epstein Becker & Green

phone: (617) 342-4000
fax:   (617) 342-4001


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