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                             STOCKHOLDERS' AGREEMENT

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                                      among

                     SYNETIC HEALTHCARE COMMUNICATIONS, INC.

                                       and

                                ITS STOCKHOLDERS


                           Dated as of January 2, 1999


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                                TABLE OF CONTENTS



                                                                            Page
                                    ARTICLE I

                                   DEFINITIONS

SECTION 1.01.  Certain Defined Terms...........................................1

                                   ARTICLE II

                               CERTAIN AGREEMENTS

SECTION 2.01.  Board of Directors..............................................8
SECTION 2.02.  Certain Issuances of New Securities.............................9
SECTION 2.03.  Deployment Level...............................................10
SECTION 2.04.  Investment in THINC............................................12
SECTION 2.05.  Cerner Warrant.................................................13
SECTION 2.06.  Affiliate Transactions.........................................13
SECTION 2.07.  Public Offerings Co-operation..................................13
SECTION 2.08.  Liquidity of Cerner Shares.....................................14

                                   ARTICLE III

                            RESTRICTIONS ON TRANSFER

SECTION 3.01.  General Restriction............................................14
SECTION 3.02.  Legends  ......................................................15
SECTION 3.03.  Certain Restrictions on Transfer...............................16
SECTION 3.04.  "Tag-Along" Rights.............................................16
SECTION 3.05.  "Drag-Along" Rights............................................19
SECTION 3.06.  Certain Persons to Execute Agreement...........................22
SECTION 3.07.  Improper Sale or Encumbrance...................................22

                                   ARTICLE IV

                               REGISTRATION RIGHTS

SECTION 4.01.  Demand Registration............................................23
SECTION 4.02.  Registration Procedures........................................24
SECTION 4.03   Indemnification................................................26
SECTION 4.04.  Contribution...................................................27





                                       ii


                                                                            Page


SECTION 4.05.  Right to Participate...........................................28
SECTION 4.06.  No Assignment..................................................28

                                    ARTICLE V

                                  MISCELLANEOUS

SECTION 5.01.  Termination....................................................28
SECTION 5.02.  Conflict with Certificate of Incorporation or By-laws
                 of the Company...............................................28
SECTION 5.03.  Expenses ......................................................29
SECTION 5.04.  Notices  ......................................................29
SECTION 5.05.  Public Announcements...........................................30
SECTION 5.06.  Headings ......................................................30
SECTION 5.07.  Severability...................................................30
SECTION 5.08.  Entire Agreement...............................................31
SECTION 5.09.  Assignment.....................................................31
SECTION 5.10.  No Third Party Beneficiaries...................................31
SECTION 5.11.  Amendment......................................................31
SECTION 5.12.  Governing Law..................................................31
SECTION 5.13.  Counterparts...................................................31
SECTION 5.14.  Specific Performance...........................................31
SECTION 5.15.  Payments ......................................................32
SECTION 5.16.  Waiver of Jury Trial...........................................32







         STOCKHOLDERS' AGREEMENT, dated as of January 2, 1999, among SYNETIC
HEALTHCARE COMMUNICATIONS, INC., a Delaware corporation (the "Company");
SYNETIC, INC., a Delaware corporation ("Synetic"); AVICENNA SYSTEMS CORPORATION,
a Massachusetts corporation ("Avicenna"), and a wholly owned subsidiary of
Synetic; and CERNER CORPORATION, a Delaware corporation ("Cerner").

                              W I T N E S S E T H:
                              --------------------

            WHEREAS, the Company is authorized by its Certificate of
Incorporation (as such Certificate of Incorporation may be amended from time to
time, the "Certificate of Incorporation") to issue 10,000,000 shares of Common
Stock, par value $.01 per share (the "Common Stock");

         WHEREAS, on the date hereof, the Company, Synetic, Avicenna and Cerner
are consummating the transactions contemplated by the Subscription Agreement,
dated as of January 2, 1999 (the "Subscription Agreement"), among the Company,
Synetic, Avicenna and Cerner and each of the Ancillary Agreements (as defined
below); and

         WHEREAS, as a condition to the consummation of the transactions
contemplated by the Subscription Agreement and in order to make certain
agreements with respect to their respective rights and obligations as holders of
Common Stock, the parties hereto have determined that it is in their best
interests to enter into this Agreement;

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements and covenants hereinafter set forth, the parties hereto hereby agree
as follows:


                                    ARTICLE I

                                   DEFINITIONS

         SECTION 1.01. Certain Defined Terms. As used in this Agreement, the
following terms shall have the following meanings:

         "Affiliate" means, with respect to any specified Person, any other
    Person that directly, or indirectly through one or more intermediaries,
    controls or is controlled by, or is under common control with, such
    specified Person.

         "Affiliated Group", with respect to any Person, means such Person and
    each Affiliate and Associate of such Person and each other Person with whom
    such Person is acting "as a partnership, limited partnership, syndicate, or
    other group for the purpose of acquiring, holding, or disposing of" Shares
    (within the meaning of Section 13(d)(3) of the Exchange Act, regardless of
    whether the Company shall at any time be subject to the requirements of the
    Exchange Act).






                                        2

         "Agreement" or "this Agreement" means this Stockholders' Agreement,
    dated as of January 2, 1999, among the Company and each of the other parties
    signatory hereto, and all amendments hereto made in accordance with the
    provisions of Section 5.11.

         "Ancillary Agreements" means:

              (i) the Non-Competition Agreement;

              (ii) a marketing agreement between Cerner and the Company, dated
         as of the date hereof;

              (iii) a license agreement between Cerner and the Company, dated as
         of the date hereof;

              (iv) a master services and outsourcing agreement between Cerner
         and the Company, dated as of the date hereof;

              (v) a services agreement between Synetic and the Company, dated as
         of the date hereof; and

              (vi) a subscription agreement between Cerner and the Company,
         dated as of January 2, 1999.

         "Associate" has the meaning given such term in Rule 12b-2 under the
    Exchange Act.

         "Avicenna" has the meaning specified in the preamble to this Agreement.

         "beneficial owner" or "beneficially own" has the meaning given such
    term in Rule 13d-3 under the Exchange Act.

         "Board" means the Board of Directors of the Company.

         "Business Day" means any day that is not a Saturday, a Sunday or other
    day on which banks are required or authorized by law to be closed in the
    City of New York.

         "Capital Stock" means, with respect to any Person at any time, any and
    all shares, interests, participations or other equivalents (however
    designated, whether voting or non-voting) of capital stock, partnership
    interests (whether general or limited) or equivalent ownership interests in
    or issued by such Person.






                                        3

         "CareXchange" means the transaction environment, consisting of the
    Company's host computer or computers and a network or networks set up by the
    Company to enable physicians and their staff to perform information
    activities and transactions by interfacing between their computers, those of
    the Company, and those of healthcare payers, laboratories and pharmacies.

         "Cash Equivalents" means (a) marketable direct obligations issued or
    unconditionally guaranteed by the United States government or issued by any
    agency thereof and backed by the full faith and credit of the United States,
    in each case maturing within one year from the date of acquisition thereof;
    (b) marketable direct obligations issued by any state of the United States
    or any political subdivision of any such state or any public instrumentality
    thereof maturing within one year from the date of acquisition thereof and,
    at the time of acquisition, having the highest rating obtainable from either
    Standard & Poor's Ratings Services, a Division of The McGraw-Hill Companies,
    Inc. ("S&P") or Moody's Investors Service, Inc.; or (c) commercial paper
    maturing not more than one year from the date of issuance thereof and, at
    the time of acquisition, having the highest rating obtainable from either
    S&P or Moody's Investors Service, Inc.

         "Cerner" has the meaning specified in the preamble to this Agreement.

         "Certificate of Incorporation" has the meaning specified in the
    recitals to this Agreement.

         "Commission" means the Securities and Exchange Commission, and any
    successor commission or agency having similar powers.

         "Common Stock" has the meaning specified in the recitals to this
    Agreement.

         "Company" has the meaning specified in the preamble to this Agreement.

         "Control" (including the terms "controlled by" and "under common
    control with"), with respect to the relationship between or among two or
    more Persons, means the possession, directly or indirectly or as trustee or
    executor, of the power to direct or cause the direction of the affairs or
    management of a Person, whether through the ownership of voting securities,
    as trustee or executor, by contract or otherwise, including, without
    limitation, the ownership, directly or indirectly, of securities having the
    power to elect a majority of the board of directors or similar body
    governing the affairs of such Person.

         "Encumbrance" means any security interest, pledge, mortgage, lien
    (including, without limitation, environmental and tax liens), charge,
    encumbrance, adverse claim, preferential arrangement or restriction of any
    kind, including, without limitation, any





                                        4

    restriction on the use, voting, transfer, receipt of income or other
    exercise of any attributes of ownership.

         "Exchange Act" means the Securities Exchange Act of 1934, as amended,
    and the rules and regulations thereunder.

         "Fair Value" means (i) as to publicly traded securities, the average of
    the daily closing prices or last reported sales price, as applicable, or if
    closing prices or last reported sales prices are not available, the average
    of the highest reported bid and the lowest reported asked price, for the ten
    (10) consecutive trading days ending on the most recent trading day prior to
    the date of determination, and (ii) as to other assets, the fair market
    value of such assets determined in good faith by an independent nationally
    recognized investment banking firm selected by the Company and approved by
    the Stockholders (which approval shall not be unreasonably withheld) and
    which shall have provided no material services to the Company or any
    Stockholder within the preceding year.

         "Full Deployment" means the attainment by the Company of in excess of
    15,000 registered physician users of the CareXchange, on the date at which
    the number of such CareXchange users is being evaluated in accordance with
    Section 2.03(a) or Section 2.08, at least 50% of such users logging onto the
    CareXchange server, or creating transactions to be processed by the
    CareXchange server, three or more times per week in each week during the
    four (4) weeks immediately prior to the date at which the number of such
    CareXchange users is being evaluated in accordance with Section 2.03(a) or
    Section 2.08 and ending on such date.

         "Fully Diluted Shares" means the aggregate of (i) the number of Shares
    issued and outstanding (other than Shares held in the treasury of the
    Company or held by any Subsidiary) and (ii) the number of Shares issuable
    upon (x) the exercise of any then exercisable outstanding options, warrants
    or similar instruments (other than such instruments held by the Company or
    any Subsidiary) and (y) the exercise of any then exercisable conversion or
    exchange rights with respect to any outstanding securities or instruments
    (other than such securities or instruments held by the Company or any
    Subsidiary).

         "IPO Lock-Up Period" means the period from the date of the Public
    Offering pursuant to which the Company first becomes a Public Company up to
    the date six months after the end of any "lock-up" period during which the
    Company agrees with the underwriters of such Public Offering not to issue or
    sell additional shares of Capital Stock.

         "Limited Deployment" means the attainment by the Company of less than
    8,000, but more than 5,000, registered physician users of the CareXchange,
    on the date at which





                                        5

    the number of such CareXchange users is being evaluated in accordance with
    Section 2.03(a).

         "Marketable Securities" means securities that are (a) (i) securities of
    or other interests in any Person that are traded on a national securities
    exchange, reported on the Nasdaq Stock Market System or otherwise actively
    traded over-the-counter or (ii) debt securities of an issuer that has debt
    or equity securities that are so traded or so reported on and which a
    nationally recognized securities firm has agreed to make a market in, and
    (b) not subject to restrictions on transfer as a result of any applicable
    contractual provisions or the provisions of the Securities Act or, if
    subject to such restrictions under the Securities Act, are also subject to
    registration rights reasonably acceptable to Avicenna.

         "Minimum Registration Amount" means a number of shares of Registrable
    Securities equal to twenty-five percent (25%) of the total number of shares
    of Common Stock held by Cerner as at the date hereof.

         "New Securities" means any Capital Stock of the Company, whether or not
    now authorized, and rights, options or warrants to purchase such Capital
    Stock, and securities of any type whatsoever that are, or may become,
    convertible into or exchangeable or exercisable for Capital Stock of the
    Company; provided, however, that the term "New Securities" does not include
    (i) securities of the Company issued to employees, consultants, officers or
    directors of the Company, or which have been reserved for issuance, pursuant
    to any employee stock option, stock purchase, stock bonus plan, or other
    similar stock agreement or arrangement approved by the Board; (ii)
    securities of the Company issued in connection with any stock split, stock
    dividend or recapitalization of the Company; (iii) securities of the Company
    issued in a Public Offering; (iv) securities of the Company issued upon the
    conversion or exchange of convertible or exchangeable securities of the
    Company that are outstanding as of the date of this Agreement or that have
    been issued in compliance with the provisions of Section 2.02; any (v) and
    right, option or warrant to acquire any security convertible into or
    exchangeable or exercisable for the securities excluded from the definition
    of New Securities pursuant to subsection (i) above if issued pursuant to any
    employee stock option, stock purchase, stock bonus plan or other similar
    stock agreement or arrangement approved by the Board.

         "Non-Competition Agreement" means the non-competition agreement among
    Synetic, Avicenna, Cerner and the Company, dated as of the date hereof.

         "Permitted Transferee" means (a) (i) in the case of Cerner, any
    Subsidiary of Cerner; (ii) in the case of Avicenna or Synetic, any
    Subsidiary of Synetic; and (iii) in the case of the Company, any Subsidiary
    of the Company; or (b) any Person with respect to 






                                        6

    which the parties agree that they have no objection if a Sale of Shares is 
    made to such Person.

         "Person" means any individual, partnership, firm, corporation,
    association, trust, unincorporated organization or other entity, as well as
    any syndicate or group that would be deemed to be a person under Section
    13(d)(3) of the Exchange Act.

         "Prospective Transferee" has the meaning set forth in Section 3.06(a).

         "Public Company" means that, as of the date of determination, the
    shares of Common Stock that have been sold in Public Offerings shall equal
    not less than 10% of the then outstanding shares of Common Stock (determined
    on a fully diluted basis).

         "Public Offering" means an underwritten public offering of equity
    securities of the Company pursuant to an effective registration statement
    under the Securities Act.

         "Registrable Securities" means all Restricted Shares, at any time
    outstanding, held by Cerner or its Permitted Transferees, if any. As to any
    particular Registrable Securities that have been issued, such securities
    shall cease to be Registrable Securities when (i) a registration statement
    with respect to the sale of such securities shall have become effective
    under the Securities Act and such securities shall have been disposed of
    under such registration statement; (ii) they shall have become freely
    tradeable pursuant to Rule 144 (k); (iii) they shall have been otherwise
    transferred or disposed of, and new certificates therefor not bearing a
    legend to the effect set forth in the first paragraph of the form of legend
    required by Section 3.02(a) restricting further transfer shall have been
    delivered by the Company, and subsequent transfer or disposition of them
    shall not require their registration or qualification under the Securities
    Act or any similar state law then in force; or (iv) they shall have ceased
    to be outstanding.

         "Registration Expenses" means all out-of-pocket expenses incident to
    the Company's performance of or compliance with Article IV, including,
    without limitation, all registration and filing fees (including filing fees
    with respect to the National Association of Securities Dealers, Inc.), all
    fees and expenses of complying with state securities or "blue sky" laws
    (including reasonable fees and disbursements of underwriters' counsel in
    connection with any "blue sky" memorandum or survey), all printing expenses,
    all listing fees, all registrars' and transfer agents' fees, the fees and
    disbursements of counsel for the Company and of its independent certified
    public accountants, including the expenses of any special audits and/or
    "comfort" letters required by or incident to such performance and
    compliance, the reasonable fees and disbursements of one outside counsel
    retained by the holders of Registrable Securities being registered (which
    counsel shall be satisfactory to the holders of a majority of the shares of
    Registrable Securities being registered), but excluding underwriting
    discounts and commissions and applicable 






                                        7

    transfer taxes, if any, which shall be borne by the sellers of the
    Registrable Securities being registered in all cases.

         "Restricted Shares" means all Shares other than (a) Shares that have
    been registered under a registration statement pursuant to the Securities
    Act; (b) Shares with respect to which a Sale has been made in reliance upon,
    and in accordance with, Rule 144; or (c) Shares with respect to which the
    holder thereof shall have delivered to the Company either (i) a written
    opinion, in form and substance reasonably satisfactory to the Company, of
    counsel, who shall be reasonably satisfactory to the Company, or (ii) a "no
    action" letter from the Commission, to the effect that subsequent transfers
    of such Shares may be effected without registration under the Securities
    Act.

         "Restructuring Event " means the attainment by the Company of 5,000 or
    fewer registered physician users of the CareXchange, on the date at which
    the number of such CareXchange users is being evaluated in accordance with
    Section 2.03(a).

         "Rule 144" means Rule 144 (or any successor provision) under the
    Securities Act.

         "Rule 144 Transaction" means any Sale of shares of Common Stock made in
    reliance upon, and in accordance with, Rule 144.

         "Sale" means any sale, assignment, transfer, distribution or other
    disposition of Shares or of a participation or other right therein, whether
    voluntarily or by operation of law.

         "Securities Act" means the Securities Act of 1933, as amended, and the
    rules and regulations thereunder.

         "Share" means any share of Common Stock.

         "Stockholder" means each Person (other than the Company) who shall be a
    party to this Agreement, whether in connection with the execution and
    delivery hereof as of the date hereof, pursuant to Section 3.06 or
    otherwise, so long as such Person shall own, beneficially or of record, any
    Shares.

         "Subsidiary" or "Subsidiaries" of any Person means any corporation,
    partnership, joint venture, association or other entity, all of the capital
    stock or other similar equity interests of which, are owned beneficially and
    of record by such Person directly or indirectly through one or more
    intermediaries.

         "Successful Deployment" means the attainment by the Company of at least
    8,000 registered physician users of the CareXchange, but Full Deployment has
    not yet been 







                                        8
    achieved, on the date at which the number of such CareXchange users is being
    evaluated in accordance with Section 2.03(a).

         "Synetic" has the meaning specified in the preamble to this Agreement.

         "THINC" means The Health Information Network Connection LLC, a New York
    limited liability company.

         "Third Party" means, with respect to any Stockholder, any Person, other
    than (i) the Company, (ii) any Subsidiary of the Company or (iii) any
    Permitted Transferee of such Stockholder.


                                   ARTICLE II

                               CERTAIN AGREEMENTS

         SECTION 2.01. Board of Directors. (a) Cerner Directors. At all times
prior to such time as the Company first becomes a Public Company, Cerner shall
be entitled, at its election, to have one of its representatives receive notice
of and to attend on a nonvoting basis each meeting of the Board or to have its
nominees on the Board represent the greater of (A) one director and (B) such
number of directors representing twenty percent (20%) of the total number of
directors (rounded down to the nearest whole number) (such nominees being,
collectively, the "Cerner Directors"). The procedures set forth in subsections
(b) through (e) of Section 2.01 shall govern Cerner if it elects to have one or
more of its nominees serve as a member of the Board.

         (b) Nomination by Cerner. Cerner shall be entitled to nominate one or
more candidates for director of the Company, which nomination shall be
considered at a meeting of Stockholders to be held within thirty (30) days of
such nomination, such that upon election of all candidates at such meeting, or
pursuant to unanimous written consent of all Stockholders, the Board shall
include the appropriate number of Cerner Directors. Promptly following such
nomination, the Stockholders will take all actions necessary to cause the Board
to contain the appropriate number of Cerner Directors. If Cerner does not
nominate any candidate for director there shall be no Cerner Directors serving
on the Board of Directors until Cerner does nominate candidates to be Cerner
Directors.

         (c) Voting Agreement. Each Stockholder shall take all actions necessary
to vote all Shares entitled to vote and owned or held of record by such
Stockholder at any annual or special stockholders' meeting at which one or more
directors are elected in favor of, or shall take all actions by written consent
in lieu of any such meeting necessary to cause, the election of all individuals
that are candidates to serve as directors, including individuals, if any, that
are candidates to serve as Cerner Directors, at such time.






                                        9

         (d) Removal. Each Stockholder agrees that, if, at any time, it is then
entitled to vote for the removal of directors of the Company, it will not vote
any Shares in favor of the removal of a Cerner Director unless such removal
shall be for Cause (as defined below) or Cerner shall have consented to or
directed such removal in writing; provided, however, that if the size of the
Board is reduced such that the number of Cerner Directors would be reduced,
Cerner shall direct the removal of the appropriate number of directors. Removal
for "Cause" shall mean removal of a director because of such director's (A)
willful and continued failure to substantially perform his duties as a director
of the Company, (B) willful conduct which is significantly injurious to the
Company, momentarily or otherwise, (C) conviction for, or guilty plea to, a
felony or a crime involving moral turpitude, (D) abuse of illegal drugs or other
controlled substances or habitual intoxication, or (E) willful breach of this
Agreement by Cerner.

         (e) Vacancies. If, as a result of death, disability, retirement,
resignation, removal (with or without Cause) or otherwise, there shall exist or
occur any vacancy in the directorship that had been held by a Cerner Director or
if the size of the Board is increased such that the number of Cerner Directors
would be increased, then Cerner shall have the right to designate in writing the
nominee for election to fill such vacancy or to be such additional Cerner
Director and each Stockholder then entitled to vote for the election of such
nominee as a director of the Company agrees that it will vote its Shares, or
execute a written consent, as the case may be, so as to elect such nominee as a
director of the Company.

         (f) Termination. The provisions of this Section 2.01 shall terminate at
such time as the Company first becomes a Public Company or, if earlier, at the
time of any sale by Cerner of all of its shares.

         (g) No Transfer. Notwithstanding any other provision of this Agreement,
the rights of Cerner pursuant to this Section 2.01 shall not be transferrable to
a Third Party by Cerner, but will transfer to a Permitted Transferee of Cerner
to whom Cerner transfers all of the Cerner Shares.

         SECTION 2.02. Certain Issuances of New Securities. (a) In the event the
Company proposes to issue New Securities to Synetic or any Affiliate of Synetic,
other than pursuant to a stock dividend or other pro rata distribution to
stockholders, the Company hereby grants to Cerner the right to purchase in lieu
of Synetic or such Affiliate, in accordance with Section 2.02(b), a number of
shares or other amount of any New Securities which the Company proposes to issue
equal to the product of (a) the total number of shares or other amount of such
New Securities which the Company proposes to issue to Synetic or any Affiliate
of Synetic at such time, multiplied by (b) a fraction, (i) the numerator of
which shall be the total number of Fully Diluted Shares then beneficially owned
by Cerner, excluding any Cerner warrants not exercisable under Section 2.05 and
(ii) the denominator of which shall be the total number of Fully Diluted Shares
then beneficially owned by Cerner and its Affiliates and by Synetic and its
Affiliates excluding any Cerner warrants not exercisable under Section 2.05.






                                       10

         (b) In the event that the Company proposes to issue New Securities to
Synetic or any Affiliate of Synetic, it shall give Cerner written notice (a
"Notice of Issuance") of its intention, describing all material terms of the New
Securities and the price and all material terms upon which the Company proposes
to issue such New Securities. Cerner shall have ten (10) business days from the
date of the Notice of Issuance to agree to purchase all or any portion of its
pro rata share of such New Securities (as determined pursuant to Section
5.01(a)) at the price and upon the terms stated in the Notice of Issuance;
provided, however, that if the Company is proposing to issue New Securities for
consideration other than all cash, the Company shall accept from Cerner either
non-cash consideration which is reasonably comparable to the non-cash
consideration specified in the Notice of Issuance or the cash in an amount equal
to the Fair Value of the non-cash consideration. Any purchase by Cerner of New
Securities shall be consummated on the date on which all other New Securities
described in the applicable Notice of Issuance are issued to Synetic and/or any
of its Affiliates.

         (c) Termination. The provisions of this Section 2.02 shall terminate at
such time as the Company first becomes a Public Company.

         (d) No Transfer. Notwithstanding any other provision of this Agreement,
the rights of Cerner pursuant to this Section 2.02 shall not be transferrable to
a Third Party by Cerner, but will transfer to a Permitted Transferee of Cerner
to whom Cerner transfers all of the Cerner Shares.

         SECTION 2.03. Deployment Level. (a) (i) The Company, Avicenna and
Cerner agree that on February 15, 2001, the Company shall determine whether Full
Deployment, Successful Deployment, Limited Deployment or a Restructuring Event
has occurred (the "Deployment Level"). As promptly as practicable, but in any
event within thirty (30) calendar days of February 15, 2001, the Company shall
deliver notice thereof to Cerner.

         (ii) Cerner may dispute the Deployment Level if it so notifies the
Company within thirty (30) calendar days of receipt of notice thereof from the
Company, specifying, in reasonable detail, the basis for such dispute. If Cerner
and the Company are unable to reach a resolution within ten (10) calendar days
after receipt by the Company of Cerner's written notice of dispute, they shall
submit the dispute for resolution to an independent public accounting firm of
national reputation mutually acceptable to the Company and Cerner (the
"Independent Accounting Firm"), which shall, within thirty (30) calendar days
from such submission, determine and report to the Company and Cerner upon the
dispute, and such report shall be final, binding and conclusive on the Company
and Cerner. The fees and disbursements of the Independent Accounting Firm shall
be paid by the Company if Cerner successfully disputes the Deployment Level and
otherwise by Cerner.

         (b) The Company and Avicenna agree that in the event of a determination
of Full Deployment in accordance with the provisions of Section 2.03(a),
effective as of February 15,





                                       11

2001, the Company shall issue to Cerner, in exchange for a cash payment equal to
the par value of such Shares, 50,000 additional new Shares (such number to be
adjusted to take account of any stock splits, reverse stock splits, stock
dividends, combinations, subdivisions or similar adjustments prior to such date)
and the Non-Competition Agreement shall continue in force.

         (c) Avicenna and Cerner agree that in the event of a determination of
Successful Deployment in accordance with the provisions of Section 2.03(a), the
number of Shares held by Cerner shall not be modified and the Non-Competition
Agreement shall continue in force.

         (d) Avicenna and Cerner agree that in the event of a determination of
Limited Deployment in accordance with the provisions of Section 2.03(a) above:

              (i) Cerner will purchase from Avicenna (or any Permitted
Transferee of Avicenna) such number of Shares as equals one percent (1%) of the
Shares then outstanding in exchange for two million dollars ($2,000,000) in
cash, such purchase to occur (x) on the thirtieth (30th) calendar day following
the delivery of notice by the Company pursuant to paragraph (a)(i) above if
Cerner does not dispute such notice or (y) ten (10) business days following the
report of the Independent Accounting Firm if Cerner disputes the notice
delivered pursuant to paragraph (a)(i) above; and

              (ii) Cerner shall, on or prior to the third anniversary of this
Agreement, have the option of transferring the Shares purchased in accordance
with paragraph (d)(i) above and all other Shares owned of record or beneficially
by Cerner to Avicenna in exchange for the par value of such Shares. If Cerner
affects such transfer on or prior to the third anniversary of this Agreement,
the Non-Competition Agreement shall be terminated in accordance with its terms,
effective on the fourth anniversary of this Agreement.

         (e) Avicenna and Cerner agree that in the event of a determination of a
Restructuring Event in accordance with the provisions of Section 2.03(a) above:

              (i) Cerner will purchase from Avicenna (or any Permitted
Transferee of Avicenna) such number of Shares as equals two percent (2%) of the
Shares then outstanding in exchange for four million dollars ($4,000,000) in
cash, such purchase to occur (x) on the thirtieth (30th) calendar day following
the delivery of notice by the Company pursuant to paragraph (a)(i) above if
Cerner does not dispute such notice or (y) ten (10) business days following the
report of the Independent Accounting Firm if Cerner disputes the notice
delivered pursuant to paragraph (a)(i) above; and

              (ii) Cerner shall have the option (exercisable within ten (10)
business days after the date of purchase under paragraph (e)(i) above) of
transferring the Shares purchased in accordance with paragraph (e)(i) above and
all other Shares owned of record or beneficially by Cerner to Avicenna in
exchange for the par value of such Shares. If Cerner affects such transfer





                                       12

within thirty (30) days of the purchase of Shares under (e)(i) above, the
Non-Competition Agreement shall be terminated in accordance with its terms,
effective on the third anniversary of this Agreement.

         (f) Nothing in this Section 2.03 shall grant or imply any obligation on
the part of Synetic and Avicenna, or any right on the part of Cerner, with
respect to the operation of the Company. No act or failure to act on the part of
the Company, Synetic or Avicenna (including but not limited to a delay or
failure by Synetic to continue its product development efforts) shall affect the
obligation of Cerner pursuant to this Section 2.03 regardless of whether such
act or failure to act could have been expected to result in a Deployment Level
being attained different from the Deployment Level actually attained.

         SECTION 2.04. Investment in THINC. (a) The Company and THINC proposes
to enter into agreements whereby the Company will manage the operations of THINC
and will provide it with certain services, copies of which have been previously
provided to Cerner (the "THINC Agreements").

         (b) In connection with the THINC Agreements, the Company shall (i) make
an equity investment in THINC of $1,500,000 in cash, (ii) issue the THINC
Warrants (as defined in Section 2.05(a) below), and (iii) agree to an initial
$2,000,000 loan to THINC (the "THINC Loan") and a potential further loan of
$1,500,000, all in exchange for receipt by the Company of 20% of the then
outstanding units of THINC.

         (c) Avicenna, Cerner and the Company agree that on closing in
accordance with the THINC Agreements, Cerner shall pay to the Company (i)
$150,000 towards the Company's obligation in Section 2.04 (b)(i) above, in
exchange, subject to Section 2.04(d) below, for a beneficial interest in 2% of
THINC's then outstanding units from the Company (the "THINC Stock"), and (ii)
$1,000,000 in respect of a fifty percent (50%) participation in the THINC Loan
(the "THINC Loan Participation").

         (d) Cerner and the Company agree that Cerner shall be the beneficial
owner of the THINC Stock and receive from the Company such dividends, income and
liquidation and disposition proceeds as it receives in respect of the THINC
Stock but that the THINC Stock remain in the record ownership of the Company and
that the Company shall freely exercise all voting rights over the THINC Stock
and shall have the right to sell, transfer, exchange, encumber or otherwise
dispose of the THINC Stock as it sees fit.

         (e) Cerner agrees that the THINC Loan shall be held in the name, and
under the sole control, of the Company and that Cerner shall have no direct
rights against THINC with respect to the THINC Loan Participation. Cerner agrees
that it shall have no rights against the Company in respect of the THINC Loan
Participation other than to receive its pro rata share of any principal and
interest payments made pursuant to the THINC Loan and actually received by the
Company.





                                       13

Cerner hereby authorizes the Company to take such action with regard to the
THINC Loan as the Company in its sole discretion deems appropriate; provided,
however, that the Company may not reduce the amount of, or alter the payment
dates of, principal or interest payable under the THINC Loan without the prior
written consent of Cerner.

         SECTION 2.05. Cerner Warrant. (a) Under the terms of the THINC
Agreements, the Company has agreed to issue to THINC warrants ("THINC Warrants")
to purchase 81,081 Shares at a price per Share determined in accordance with the
THINC Agreements (the "Exercise Price"). The Company hereby grants to Cerner a
warrant (the "Cerner Warrant") entitling it to such number of additional Shares
as equals 19.9% of the aggregate number of Shares issued pursuant to the THINC
Warrants and to Cerner pursuant to this Section 2.05 (such number to be adjusted
to take account of any stock splits, reverse stock splits, stock dividends,
combinations, subdivisions of similar adjustments prior to the date of exercise
of the Cerner Warrant) at the Exercise Price. The Cerner Warrant, exercisable
based on a Company valuation of $200 million or the Exercise Price, whichever is
lower, shall be exercisable only if the THINC Warrants have been exercised and
during each period commencing on the date on which the THINC Warrants are
exercised and ending on the first anniversary of such date.

         (b) The Company shall, at all times from the initial grant of the THINC
Warrants until the expiration thereof, reserve for issuance and delivery
pursuant to Section 2.05(a) such number of Shares as shall be required to
satisfy the Company's obligations under Section 2.05(a).

         (c) Cerner shall not, by virtue of the rights granted to it pursuant to
this Section 2.05, have any rights as a stockholder of the Company with respect
to any Shares that may be issued to it pursuant to Section 2.05(a) unless and
until such Shares are issued.

         (d) Upon execution of the THINC Agreements, the Company will provide
Cerner with copies of all THINC Agreements (including the documents related to
the THNC Loan and the THINC Warrants.

         SECTION 2.06. Affiliate Transactions. Synetic, Avicenna and the Company
agree that the Company shall not enter into any agreements with, purchase any
products or services from, sell any products or services to, grant any loans to,
or borrow from, any of Synetic, Avicenna or any of their Affiliates, other than
as permitted in the Ancillary Agreements, unless such transactions are on terms
no more favorable to Synetic, Avicenna or their Affiliates than could have been
obtained by arm's length negotiations with a person other than Synetic,
Avicenna, any of their Affiliates or the Company.

         SECTION 2.07. Public Offerings Co-operation. (a) Each of Avicenna and
Cerner agree that if the Company shall decide to undertake a Public Offering,
all parties shall co-operate fully, and provide any such assistance as the
Company and its advisers shall reasonably require, to achieve such Public
Offering. Such co-operation and assistance shall include, without limitation,





                                       14

facilitating any corporate restructuring reasonably deemed advisable by the
Company and that does not adversely affect Cerner's or Avicenna's interest in
connection with such Public Offering, providing information about the
Stockholders and their Affiliates and making representatives available to the
Company and its advisers for such assistance or as is reasonably necessary
market and implement a successful Public Offering.

         (b) Each of Avicenna and Cerner agree that following any Public
Offering, they shall not dispose of any Shares acquired in such Public Offering
until the end of six (6) months following any "lock-up" period which the Company
reasonably agrees with the underwriters of such Public Offering.

         SECTION 2.08. Liquidity of Cerner Shares. The Company, Synetic and
Avicenna agree that if:

         (a) on each of the fourth and fifth anniversary of this Agreement, the
    Company is not a Public Company and no reasonable effort, successful or
    otherwise, shall have been made by the Company during the prior twelve
    months to achieve a Public Offering pursuant to which the Company shall have
    first become a Public Company; and

         (b) Full Deployment shall have been attained at the date of whichever
    anniversary Cerner seeks to exercise its rights under this Section 2.08,

Cerner may request within thirty (30) days of each of the fourth and fifth
anniversary of this Agreement that Synetic (or Avicenna or an Affiliate of
Synetic, at Synetic's option) purchase all Shares held by Cerner at a purchase
price equal to their Fair Value. Such purchase shall, at Synetic's option, be
for cash or common stock of Synetic (valued at Fair Value), and shall be
completed within two months from that date of Cerner's request.

For the purposes of this Section 2.08, a "reasonable effort" to achieve a Public
Offering shall require the consultation by the Company with an investment bank
of national reputation experienced in initial public offerings, upon whose
advice the Company shall rely to determine whether a successful Public Offering
could be made, having regard to the Company's business and general financial
market conditions.


                                   ARTICLE III

                            RESTRICTIONS ON TRANSFER

         SECTION 3.01. General Restriction. Each Stockholder agrees that it will
not, directly or indirectly, make or solicit any Sale of, or create, incur,
solicit or assume any





                                       15

Encumbrance with respect to, any Share, except in compliance with the Securities
Act and this Agreement.

         SECTION 3.02. Legends. (a) The Company shall affix to each certificate
evidencing Shares a legend in substantially the following form:

    "THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER
    THE SECURITIES ACT OF 1933, AS AMENDED. NO REGISTRATION OF TRANSFER OF SUCH
    SECURITIES WILL BE MADE ON THE BOOKS OF THE ISSUER UNLESS SUCH TRANSFER IS
    MADE IN CONNECTION WITH AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT
    OR PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF SUCH ACT
    OR SUCH ACT DOES NOT APPLY.

    THE SECURITIES EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
    RESTRICTIONS ON TRANSFER AS SET FORTH IN A STOCKHOLDERS' AGREEMENT, DATED AS
    OF JANUARY 2, 1999, AS IT MAY THEREAFTER BE AMENDED, A COPY OF WHICH IS ON
    FILE AT THE PRINCIPAL EXECUTIVE OFFICES OF THE ISSUER. NO REGISTRATION OF
    TRANSFER OF SUCH SECURITIES WILL BE MADE ON THE BOOKS OF THE ISSUER UNLESS
    AND UNTIL SUCH RESTRICTIONS SHALL HAVE BEEN COMPLIED WITH.

    THE HOLDER OF THE SECURITIES EVIDENCED BY THIS CERTIFICATE IS ENTITLED TO
    CERTAIN RIGHTS AND SUBJECT TO CERTAIN OBLIGATIONS AS SET FORTH IN A
    STOCKHOLDERS' AGREEMENT, DATED AS OF JANUARY 2, 1999, AS IT MAY THEREAFTER
    BE AMENDED, A COPY OF WHICH IS ON FILE AT THE PRINCIPAL EXECUTIVE OFFICES OF
    THE ISSUER."

         (b) In the event that any Shares shall cease to be Restricted Shares,
the Company shall, upon the written request of the holder thereof, issue to such
holder a new certificate evidencing such Shares without the first paragraph of
the legend required by Section 3.02(a) endorsed thereon; provided, however, that
such holder shall furnish the Company or its transfer agent such certificates,
legal opinions or other information as the Company or its transfer agent may
reasonably require to confirm that the legend is not required on such
certificate. In the event that any Shares shall cease to be subject to the
restrictions on transfer set forth in this Agreement, the Company shall, upon
the written request of the holder thereof, issue to such holder a new
certificate evidencing such Shares without the second paragraph of the legend
required by Section 3.02(a). In the event that any Shares shall cease to be
entitled to any rights and subject to any obligations set forth in this
Agreement, the Company shall, upon the written 





                                       16

request of the holder thereof, issue to such holder a new certificate evidencing
such Shares without the third paragraph of the legend required by Section
3.02(a).

         SECTION 3.03. Certain Restrictions on Transfer. Each Stockholder agrees
that it will not, directly or indirectly, make or solicit any Sale of, or
create, incur, solicit or assume any Encumbrance with respect to, any Share held
by such Stockholder, and Synetic agrees that it will not, directly or
indirectly, make or solicit any Sale of, or create, incur, solicit or assume any
Encumbrance with respect to any of the capital stock of Avicenna ("Avicenna
Stock"), other than (a) any Sale or Encumbrance incurred to a Permitted
Transferee; (b) any Sale made or Encumbrance incurred by Cerner or its Permitted
Transferees, if any, after the first date that is after the later of January 2,
2001 and the end of the IPO Lock-Up Period; provided, however, that such Sale or
Encumbrance is allowed prior to January 2, 2001 if the IPO Lock-Up Period has
ended and Sales are made or Encumbrances incurred by Synetic, Avicenna or their
respective Permitted Transferees pursuant to Section 3.03(c), such Sales or
Encumbrances by Cerner or its Permitted Transferees to be of a percentage of the
total Shares it then owns which is no greater than the percentage of total
Shares owned by Synetic, Avicenna or their respective Permitted Transferees
which are sold or encumbered pursuant to Section 3.03(c); (c) any Sale that is
made or Encumbrance incurred by Synetic, Avicenna or their respective Permitted
Transferees, if any; provided, however, that if such Sale is made prior to the
time that the Company first becomes a Public Company, such Sale shall be made in
compliance with the procedures, and subject to the limitations, of the
"tag-along" rights or the "drag-along" rights set forth in Sections 3.04 and
3.05, respectively; provided, further, that Avicenna and its Permitted
Transferees shall not make any such sale during the IPO Lock-Up Period; (d) any
Sale pursuant to a Public Offering; (e) any Sale of Shares of Common Stock
pursuant to a Rule 144 Transaction so long as immediately prior to, and
immediately after the consummation of, such Rule 144 Transaction the Company is
a Public Company; or (f) any Sale by Cerner or its Permitted Transferees to
Avicenna pursuant to Section 2.03 above. Notwithstanding the foregoing, except
as otherwise expressly provided in this Agreement, (x) all Sales permitted by
the foregoing clauses (a) through (f) shall be subject to, and shall not be made
other than in compliance with, the provisions of Sections 3.01, 3.02, 3.06, and
3.07, and (y) no Sales or Encumbrances of Avicenna Stock permitted above may be
made if Avicenna acquires any assets or assumes any liabilities, other than its
Common Stock and its rights and obligations under this Agreement and the
Ancillary Agreements.

         SECTION 3.04. "Tag-Along" Rights. (a) (i) So long as (A) the Company is
not a Public Company and (B) Avicenna and its Permitted Transferees, if any,
own, in the aggregate, Shares representing at least 25% of the Shares of Common
Stock then outstanding, neither Synetic nor Avicenna nor any of their Permitted
Transferees shall, in any transaction or series of related transactions,
directly or indirectly, make any Sale of or otherwise dispose of for value any
shares of Common Stock or Avicenna Stock held by them to any Third Party or
Third Parties, unless the terms and conditions of such Sale or other disposition
shall include an offer to include, at the option of each of the other
Stockholders other than Avicenna and its Permitted Transferees (for purposes of
this Section 3.04, the "Other Stockholders"), in such Sale or other disposition
to 





                                       17

the Third Party or Third Parties, the number of shares of Common Stock then
owned by each Other Stockholder, as determined by Section 3.04(a)(iii).

         (ii) If, (A) so long as the Company is not a Public Company and (B)
Avicenna and its Permitted Transferees, if any, own, in the aggregate, Shares
representing at least 25% of the Shares of Common Stock then outstanding,
Avicenna and/or any of its Permitted Transferees receives from a Third Party or
Third Parties a bona fide offer or offers to purchase or otherwise acquire (for
purposes of this Section an "Offer") any shares of Common Stock held by Avicenna
or such Permitted Transferees or any Avicenna Stock held by Synetic or its
Permitted Transferees (both such Common Stock or Avicenna Stock for purposes of
this Section 3.04, the "Offered Shares"), and Synetic, Avicenna and/or any of
their Permitted Transferees intends to sell such Offered Shares to such Third
Party or Third Parties, then Synetic, Avicenna and all of their Permitted
Transferees (for purposes of this Section 3.04, the "Prospective Sellers") shall
jointly provide written notice (for purposes of this Section 3.04, the "Offer
Notice") of such Offer to each of the Other Stockholders not later than thirty
(30) days prior to the consummation of the Sale or other disposition
contemplated by the Offer. The Offer Notice shall identify the Offered Shares,
either (x) the price offered for such Offered Shares if the Offered Shares are
Common Stock, or (y) if the Offered Shares are Avicenna Stock, the price offered
for such Offered Shares multiplied by a fraction, the numerator of which shall
be the total number of shares of Avicenna Stock outstanding, and the denominator
of which shall be the total number of shares of Common Stock owned by Avicenna
and its Permitted Transferees (either of such prices, for purposes of this
Section 3.04, the "Offer Price"), all other material terms and conditions of the
Offer and, in the case of an Offer in which the consideration payable for
Offered Shares consists in whole or in part of consideration other than cash,
such information relating to such other consideration as may be reasonably
necessary to ascertain the value of such other consideration.

         (iii) Each of the Other Stockholders shall have the right and option,
for the period of twenty (20) days after the date the Offer Notice is given (for
purposes of this Section 3.04, the "Notice Period"), to notify the Prospective
Sellers of its interest in selling or otherwise disposing of up to the Pro Rata
Portion of its Common Stock pursuant to the Offer. For purposes of this
subsection 3.04, "Pro Rata Portion" means, with respect to each Other
Stockholder, a number of shares of Common Stock equal to either, (a) if the
Offered Shares are Common Stock, the product of (x) the total number of shares
of Common Stock then owned by such Other Stockholder, multiplied by (y) a
fraction, the numerator of which shall be the total number of shares of Common
Stock proposed to be sold by the Prospective Sellers, and the denominator of
which shall be the total number of shares of Common Stock then owned by the
Prospective Sellers, or (b) if the Offered Shares are Avicenna Stock, the
product of (x) the total number of shares of Common Stock then owned by such
Other Stockholder, multiplied by (y) a fraction, the numerator of which shall be
the total number of shares of Avicenna Stock proposed to be sold by the
Prospective Sellers and the denominator of which shall be the total number of
shares of Avicenna Stock then owned by the Prospective Sellers.






                                       18

         (iv) Each Other Stockholder desiring to exercise the "tag-along" right
provided for in this Section 3.04 shall, prior to the expiration of the Notice
Period, provide the Prospective Sellers with a written notice specifying the
number of shares of Common Stock as to which such Other Stockholder has an
interest in selling or otherwise disposing of pursuant to the Offer (for
purposes of this Section 3.04, a "Notice of Interest"), and shall deliver to the
Prospective Sellers, to be held in trust, (A) the certificate or certificates
evidencing the shares of Common Stock to be sold or otherwise disposed of by
such Other Stockholder duly endorsed in blank or accompanied by written
instruments of transfer in form reasonably satisfactory to the Prospective
Sellers executed by such Other Stockholder; (B) an instrument of assignment
reasonably satisfactory to the Prospective Sellers assigning, as of the
consummation of the Sale or other disposition to the Third Party or Third
Parties, all of such Other Stockholder's rights under this Agreement with
respect to the shares of Common Stock to be sold or otherwise disposed of; (C) a
special irrevocable power-of-attorney authorizing the Prospective Sellers, on
behalf of such Other Stockholder, to sell or otherwise dispose of such shares of
Common Stock pursuant to the terms of the Offer (at a price equal to the Offer
Price) and to take all such actions as shall be necessary or appropriate in
order to consummate such Sale or other disposition; and (D) wire transfer
instruction for payment of the purchase price for the purchase of the Other
Stockholder's Shares. Delivery of such certificate or certificates evidencing
the shares of Common Stock to be sold, the instrument of assignment, the special
irrevocable power-of-attorney authorizing the Prospective Sellers and wire
transfer instructions, on behalf of such Other Stockholder, to sell or otherwise
dispose of such Shares shall constitute an irrevocable election by such Other
Stockholder to authorize and permit the Prospective Sellers to sell such shares
of Common Stock, on behalf of such Other Stockholder, pursuant to the Offer. The
Prospective Sellers shall cause the Third Party to whom the Shares of the Other
Stockholders are being sold or otherwise disposed to deliver the appropriate
amount of immediately available funds for the purchase of such Shares to the
Other Stockholders pursuant to the wire transfer instructions described in
clause (D) above. Subject to the last sentence of this paragraph, if in
connection with such Sale or other disposition, the Prospective Sellers are to
receive consideration other than cash, Cash Equivalents or Marketable
Securities, each of the Other Stockholders shall have the right to elect to
receive in lieu thereof Cash or Cash Equivalents equal to the Fair Value of the
consideration otherwise payable to such Other Stockholder. Such Other
Stockholder shall make such election in the Notice of Interest provided to
Prospective Sellers. Notwithstanding the previous two sentences, in the event
the terms of such Sale provide that the Third Party shall be under an obligation
to, within a definite time period, make cash, Cash Equivalents or Marketable
Securities available to the Company and each of the Other Stockholders, on the
same terms to each, in exchange for such consideration received, any election to
receive cash by the Other Stockholders shall be of no force and effect.

         (v) Promptly after the consummation of the Sale or other disposition of
the shares of Common Stock of the Prospective Sellers and the shares of Common
Stock of the Other Stockholders to the Third Party or Third Parties pursuant to
the Offer, the Other Stockholders shall pay to the Prospective Sellers the Other
Stockholders' pro rata portion of the documented





                                       19

and reasonable expenses (including, without limitation, reasonable legal
expenses) actually incurred by the Prospective Sellers in connection with such
sale or disposition.

         (vi) If at the end of the Notice Period any Other Stockholder shall not
have given a Notice of Interest (and delivered all other required documents)
with respect to some or all of its shares of Common Stock, such Other
Stockholder will be deemed to have waived all of its rights under this Section
3.04 with respect to the portion of its shares of Common Stock for which a
Notice of Interest shall not have been given. If, at the end of the 180-day
period following the giving of the Offer Notice, the Prospective Sellers shall
not have completed the Sale or other disposition of all the Offered Shares and
the shares of Common Stock with respect to which Other Stockholders shall have
given Notices of Interest pursuant to this Section 3.04, the Prospective Sellers
shall return to such Other Stockholders all certificates evidencing the unsold
shares of Common Stock that such Other Stockholders delivered for Sale or other
disposition pursuant to this Section 3.04 and such Other Stockholders' related
instruments of assignment and powers-of-attorney and the Prospective Sellers
shall not consummate the Sale or other disposition with such Third Party or
Third Parties without again complying with the terms and procedures set forth in
this Section 3.04, including providing to the Other Stockholders another Offer
Notice.

         (vii) Except as expressly provided in this Section 3.04, no Prospective
Seller shall have any obligation to any Other Stockholder with respect to the
Sale or other disposition of any shares of Common Stock owned by any Other
Stockholder in connection with this Section 3.04. Anything herein to the
contrary notwithstanding and irrespective of whether any Notice of Interest
shall have been given, no Prospective Seller shall have any obligation to any
Other Stockholder to sell or otherwise dispose of any Offered Shares pursuant to
this Section 3.04 as a result of any decision by such Prospective Seller not to
accept or consummate any Offer or Sale or other disposition with respect to the
Offered Shares (it being understood that any and all such decisions shall be
made by such Prospective Seller in its sole discretion). Except as otherwise
permitted herein, no Other Stockholder shall be entitled to sell or otherwise
dispose of Shares directly to any Third Party or Parties pursuant to an Offer
(it being understood that all such sales and other dispositions shall be made
only on the terms and pursuant to the procedures set forth in this Section
3.04).

         (b) Anything in this Section 3.04 to the contrary notwithstanding, in
the event that Synetic or its Permitted Transferees shall exercise the
"drag-along" rights referred to in Section 3.05, the Other Stockholders shall
thereafter have no right pursuant to this Section 3.04 to participate in any
such sale. Nothing in this Section 3.04 shall affect any of the obligations of
any of the Stockholders under any other provision of this Agreement.

         SECTION 3.05. "Drag-Along" Rights. (a) Prior to such time as the
Company first becomes a Public Company and if Avicenna or its Permitted
Transferees, if any, own in the aggregate, Shares representing at least
twenty-five (25%) of the Shares of Common Stock then outstanding, if Synetic or
Avicenna and/or any of their Permitted Transferees, if any, shall, in any





                                       20

transaction or series of related transactions, directly or indirectly, propose
to make a Sale for cash, Cash Equivalents or Marketable Securities of shares of
Common Stock or Avicenna Stock held by them (for purposes of this Section 3.05,
the "Controlling Shares") to a Third Party or Third Parties (for purposes of
this Section 3.05, an "Offer") and as a result of such Sale such Third Party or
Third Parties and the members of any Affiliated Group of such Third Party or
Third Parties would own a majority of the then outstanding shares of Common
Stock or Avicenna Stock, Avicenna and/or its Permitted Transferees may, at their
option, require each of the other Stockholders (for purposes of this Section
3.05, the "Other Stockholders") to sell the Pro Rata Portion of its Common Stock
to such Third Party or Third Parties either (i) if the Offer was made in respect
to Common Stock, for the same consideration per share and otherwise upon the
same terms and conditions upon which Avicenna and/or its Permitted Transferees
sell their shares, or (ii) if the Offer was made in respect to Avicenna Stock,
for a consideration equal to the consideration received per share of Avicenna
Stock by Synetic or its Permitted Transferees multiplied by a fraction, the
numerator of which shall be the total number of shares of Avicenna Stock
outstanding and the denominator of which shall be the total number of shares of
Common Stock owned by Avicenna and its Permitted Transferees. For purposes of
this Section 3.05, "Pro Rata Portion" means, with respect to each Other
Stockholder, either (a) if the Controlling Shares are Common Stock, a number of
shares of Common Stock equal to the product of (x) the total number of shares of
Common Stock then owned by such Other Stockholder, multiplied by (y) a fraction,
the numerator of which shall be the total number of shares of Common Stock
proposed to be sold by Avicenna and/or its Permitted Transferees, and the
denominator of which shall be the total number of shares of Common Stock then
owned by Avicenna and/or its Permitted Transferees, or (b) if the Controlling
Shares are Avicenna Stock, the product of (x) the total number of shares of
Common Stock then owned by such Other Stockholder, multiplied by (y) a fraction,
the numerator of which shall be the total number of shares of Avicenna Stock
proposed to be sold by Synetic and/or its Permitted Transferees, and the
denominator of which shall be the total number of shares of Avicenna Stock then
owned by Synetic and/or its Permitted Transferees.

         (b) (i) Avicenna and/or such Permitted Transferees shall provide a
written notice (for purposes of this Section 3.05, the "Offer Notice") of such
Offer to each of the Other Stockholders not later than the fifteenth Business
Day prior to the consummation of the Sale contemplated by the Offer. The Offer
Notice shall contain written notice of the exercise of the "drag-along" rights
of Synetic or Avicenna and/or their Permitted Transferees pursuant to Section
3.05(a), setting forth the consideration per share of Common Stock to be paid by
the Third Party or Third Parties and the other material terms and conditions of
the Offer. Within 10 Business Days following the date the Offer Notice is given,
each of the Other Stockholders shall deliver to Avicenna and/or such Permitted
Transferees, to be held in trust, (A) the certificate or certificates evidencing
the Pro Rata Portion of Common Stock owned or held by such Other Stockholder
duly endorsed in blank or accompanied by written instruments of transfer in form
reasonably satisfactory to Avicenna and/or such Permitted Transferees executed
by such Other Stockholder, (B) a special irrevocable power-of-attorney
authorizing Avicenna and/or such Permitted Transferees, on behalf of such Other
Stockholder, to sell or otherwise dispose of such





                                       21

shares of Common Stock pursuant to the terms of the Offer and to take all such
actions as shall be necessary or appropriate in order to consummate such sale or
disposition, and (C) wire transfer instructions for payment of the purchase
price of the Other Stockholder's Shares; provided that no Other Stockholder
shall have any liability to any purchaser of the shares of Common Stock pursuant
to the Offer in excess of the aggregate proceeds received by such Other
Stockholder in exchange for its shares of Common Stock. Synetic or Avicenna
and/or their Permitted Transferees shall cause the Third Party to whom the
Shares of the Other Stockholders are being sold or otherwise disposed to deliver
the appropriate amount of immediately available funds for the purchase of such
Shares to the Other Stockholders pursuant to the wire transfer instructions
described in clause (C) above. If in connection with such Sale or other
disposition, Synetic or Avicenna and/or their Permitted Transferees are to
receive consideration other than cash, Cash Equivalents or Marketable
Securities, each Other Stockholder shall have the right to elect to receive in
lieu thereof cash or Cash Equivalents equal to the Fair Value of the
consideration otherwise payable to such Other Stockholder. Such Other
Stockholder shall make such election in a written notice to Synetic or Avicenna
and/or their Permitted Transferees within ten (10) Business Days following the
date the Offer Notice is provided to such Other Stockholder.

         (ii) Promptly after the consummation of the Sale of shares to the Third
Party or Third Parties pursuant to the Offer, the Other Stockholders shall pay
to Synetic or Avicenna and/or their Permitted Transferees, as the case may be,
the Other Stockholders' pro rata portion of the documented and reasonable
expenses (including, without limitation, reasonable legal expenses) actually
incurred by Synetic or Avicenna and/or their Permitted Transferees in connection
with such Sale.

         (iii) If, at the end of the 180-day period following the giving of the
Offer Notice, Synetic or Avicenna and/or their Permitted Transferees shall not
have completed the Sale of all the Controlling Shares and the Other
Stockholders' shares delivered pursuant to Section 3.05(b)(i), Synetic or
Avicenna and/or their Permitted Transferees shall return to each of the Other
Stockholders all certificates evidencing unsold shares and related
powers-of-attorney that such Other Stockholder delivered pursuant to this
Section 3.05 and Synetic or Avicenna and/or their Permitted Transferees shall
not consummate the Sale or other disposition with such Third Party or Third
Parties without again complying with the terms and procedures set forth in this
Section 3.05, including providing to the Other Stockholders another Offer
Notice.

         (iv) Except as expressly provided in this Section 3.05, Synetic or
Avicenna and their Permitted Transferees, if any, shall have no obligation to
any Other Stockholder with respect to the Sale or other disposition of any
shares owned by any Other Stockholder in connection with this Section 3.05.
Anything herein to the contrary notwithstanding, Synetic or Avicenna and their
Permitted Transferees, if any, shall have no obligation to any Other Stockholder
to sell or otherwise dispose of any Controlling Shares pursuant to this Section
3.05 as a result of any decision by Synetic or Avicenna and/or their Permitted
Transferees not to accept or consummate any Offer or Sale with respect to the
Controlling Shares (it being understood that any and all such





                                       22

decisions shall be made by Synetic or Avicenna and/or their Permitted
Transferees in their sole discretion). No Other Stockholder shall be entitled to
make any Sale of shares directly to any Third Party pursuant to an Offer (it
being understood that all such Sales shall be made only on the terms and
pursuant to the procedures set forth in this Section 3.05). Nothing in this
Section 3.05 shall affect any of the obligations of any of the Stockholders
under any other provision of this Agreement.

         (c) Anything in this Section 3.05 to the contrary notwithstanding, the
provisions of this Section 3.05 shall not be applicable from such time as the
Company becomes a Public Company and shall not be applicable to: (i) any Sale of
Shares pursuant to a Public Offering; or (ii) any Sale of Shares in a Rule 144
Transaction so long as immediately prior to, and immediately after the
consummation of, such Rule 144 Transaction the Company is a Public Company.

         SECTION 3.06. Certain Persons to Execute Agreement. (a) Each
Stockholder agrees that it will not directly or indirectly make any Sale of, or
create, incur or assume any Encumbrance with respect to, any Shares held by such
Stockholder, unless, prior to the consummation of any such Sale or the creation,
incurrence or assumption of any such Encumbrance, the Person to whom such Sale
is proposed to be made or the Person in whose favor such Encumbrance is proposed
to be created, incurred or assumed (for purposes of this Section 3.06, a
"Prospective Transferee") (i) executes and delivers to the Company an agreement,
in form and substance reasonably satisfactory to the Company, whereby such
Prospective Transferee confirms that, with respect to the Shares that are the
subject of such Sale or Encumbrance, it shall be deemed to be a "Stockholder"
for the purposes of this Agreement and agrees to be bound by all the terms of
this Agreement and (ii) delivers to the Company a written opinion of counsel,
satisfactory in form and substance to the Company, to the effect that the
agreement referred to above that is delivered by such Prospective Transferee is
a legal, valid and binding obligation of such Prospective Transferee enforceable
against such Prospective Transferee in accordance with its terms. Upon the
execution and delivery by such Prospective Transferee of the agreement referred
to in clause (i) of the next preceding sentence and, if required, the delivery
of the opinion of counsel referred to in clause (ii) of the next preceding
sentence, such Prospective Transferee shall be deemed a "Stockholder" for the
purposes of this Agreement, and shall have the rights and be subject to the
obligations of a Stockholder hereunder with respect to the Shares held by such
Prospective Transferee or in respect of which such Encumbrance shall have been
created, incurred or assumed.

         (b) Anything in this Section 3.06 to the contrary notwithstanding, the
provisions of this Section 3.06 will not be applicable to (i) any Sale of Shares
pursuant to a Public Offering or (ii) any Sale of Shares in a Rule 144
Transaction so long as immediately prior to, and immediately after the
consummation of, such Rule 144 Transaction the Company is a Public Company.






                                       23

         SECTION 3.07. Improper Sale or Encumbrance. Any attempt to make any
Sale of, or create, incur or assume any Encumbrance with respect to, any Shares
not in compliance with this Agreement shall be null and void and the Company
shall not give any effect in the Company's stock records to such attempted Sale
or Encumbrance.


                                   ARTICLE IV

                               REGISTRATION RIGHTS

         SECTION 4.01. Demand Registration. (a) At any time during the period
commencing at the later of January 2, 2001 and the completion of the IPO Lock-Up
Period, and ending three (3) years thereafter, Cerner may make a written request
for registration under the Securities Act of all or part of its Registrable
Securities (a "Demand Registration") for the disposition of such Registrable
Securities pursuant to an underwritten public offering; provided, however, that
the Company shall not be obligated to effect more than two Demand Registrations;
and provided, further, however, that each Demand Registration cover at least the
Minimum Registration Amount. A request for a Demand Registration will specify
the number of shares of Registrable Securities proposed to be sold. A
registration will not count as a Demand Registration until the registration
statement relating thereto has become effective. Cerner shall not request a
Demand Registration during the six-month period following the effective date of
the registration statement relating to a prior Demand Registration.

         (b) Notwithstanding any other provision hereof to the contrary, the
Company shall be entitled, in its sole discretion, to elect once with respect to
each of the Demand Registrations it may be requested to effect to delay the
filing of a registration statement pursuant to the terms hereof for up to 120
days from the date of the request therefor under Section 4.01(a).

         (c) The Company shall have the right to select the managing underwriter
or underwriters for the underwritten public offering to which each Demand
Registration relates, subject to the approval of the Cerner, which shall not be
unreasonably withheld.

         (d) If the managing underwriter or underwriters shall advise the
Company and Cerner that, in the view of such underwriters, Cerner shall have
requested the registration of a number of Registrable Securities that exceeds
the maximum number of securities that can be sold without having an adverse
effect on a Demand Registration, including the price at which such securities
can be sold, the Company shall not be required to register shares in excess of
such maximum number.

         (e) The Company shall co-operate fully, and provide such assistance as
Cerner and its advisors shall reasonably require, to achieve each Demand
Registration. Such co-operation and assistance shall include, without
limitation, providing information about the 





                                       24

Company and making representatives available to Cerner and its advisers for such
assistance or as is reasonably necessary to market and implement a successful
Demand Registration.

         (f) The Company shall pay all Registration Expenses in connection with
each Demand Registration.

         SECTION 4.02. Registration Procedures. Whenever Cerner requests that
any Registrable Securities be registered pursuant to Section 4.01 hereof, and
subject to Sections 4.01(b) and 4.01(d), the Company will use its reasonable
efforts to effect the registration of such Registrable Securities as promptly as
practicable, and in connection with any such request:

         (a) The Company will prepare and file with the Commission a
    registration statement on any form for which the Company then qualifies and
    which counsel for the Company shall deem appropriate and available for the
    sale of the Registrable Securities to be registered thereunder and in
    accordance with the distribution thereof pursuant to an underwritten public
    offering, and use its reasonable efforts to cause such filed registration
    statement to become and remain effective for a period of not less than the
    earlier of (i) the completion of the sale of all of the Registrable
    Securities and (ii) 90 days.

         (b) The Company will, if requested, prior to filing such registration
    statement or any amendment or supplement thereto, furnish to Cerner and each
    managing underwriter copies thereof, and thereafter furnish to Cerner and
    each such underwriter such number of copies of such registration statement,
    each amendment and supplement thereto (in each case including all exhibits
    thereto and documents incorporated by reference therein) and the prospectus
    included in such registration statement (including each preliminary
    prospectus) as Cerner or such underwriter may reasonably request in order to
    facilitate the sale of the Registrable Securities.

         (c) After the filing of the registration statement, the Company will
    promptly notify Cerner of any stop order issued or, to the knowledge of the
    Company, threatened to be issued by the Commission and take all necessary
    actions required to prevent the entry of such stop order or to remove it if
    entered.

         (d) The Company will endeavor to qualify the Registrable Securities for
    offer and sale under such other securities or "blue sky" laws of such
    jurisdictions in the United States as Cerner reasonably (in light of the
    plan of distribution of such Registrable Securities pursuant to an
    underwritten public offering) requests; provided, however, that the Company
    will not be required to (i) qualify generally to do business in any
    jurisdiction where it would not otherwise be required to qualify but for
    this paragraph (d), (ii) subject itself to taxation in any such jurisdiction
    or (iii) consent to general service of process in any such jurisdiction.






                                       25

         (e) The Company will, as promptly as practicable, notify Cerner, at any
    time when a prospectus relating to the sale of the Registrable Securities is
    required by law to be delivered in connection with sales by an underwriter
    or dealer, of the occurrence of an event requiring the preparation of a
    supplement or amendment to such prospectus so that, as thereafter delivered
    to the purchasers of such Registrable Securities, such prospectus will not
    contain an untrue statement of a material fact or omit to state any material
    fact required to be stated therein or necessary to make the statements
    therein, in the light of the circumstances under which they were made, not
    misleading, and as promptly as practicable make available to Cerner and to
    the underwriters any such supplement or amendment. Cerner agrees that, upon
    receipt of any notice from the Company of the happening of any event of the
    kind described in the preceding sentence, Cerner will forthwith discontinue
    the offer and sale of Registrable Securities pursuant to the registration
    statement covering such Registrable Securities until receipt of the copies
    of such supplemented or amended prospectus and, if so directed by the
    Company, Cerner will deliver to the Company all copies, other than permanent
    file copies then in Cerner's possession, of the most recent prospectus
    covering such Registrable Securities at the time of receipt of such notice.
    In the event the Company shall give such notice, the Company shall extend
    the period during which such registration statement shall be maintained
    effective as provided in Section 4.02(a) hereof by the number of days during
    the period from and including the date of the giving of such notice to the
    date when the Company shall make available to Cerner such supplemented or
    amended prospectus.

         (f) The Company will enter into customary agreements (including an
    underwriting agreement in customary form and satisfactory in form and
    substance to the Company) and take such other actions as are reasonably
    required in order to expedite or facilitate the sale of such Registrable
    Securities.

         (g) The Company will furnish to Cerner and to each managing underwriter
    a signed counterpart, addressed to Cerner and each underwriter, of (i) an
    opinion or opinions of counsel to the Company and (ii) a "comfort" letter or
    "comfort" letters from the Company's independent public accountants, each in
    customary form and covering such matters of the type customarily covered by
    opinions or "comfort" letters delivered to such parties.

         (h) The Company shall make available for inspection by Cerner, any
    underwriter participating in any distribution pursuant to such registration
    statement, and any attorney, accountant or other agent retained by Cerner or
    underwriter (collectively for purposes of this clause (h), the
    "Inspectors"), all financial and other records, pertinent corporate
    documents and properties of the Company reasonably necessary to enable the
    Inspectors to exercise their due diligence responsibility, and cause the
    Company's officers, directors and employees to supply all information
    reasonably requested by any such seller, underwriter, attorney, accountant
    or agent in connection with such registration statement.





                                       26

         (i) The Company shall provide a transfer agent and registrar for all
    Registrable Securities included in such registration statement not later
    than the effective date of such registration statement.

         (j) The Company will use its best efforts to cause all such Registrable
    Securities to be listed on each securities exchange or quotation system on
    which similar securities issued by the Company are then listed.

The Company may require Cerner promptly to furnish in writing to the Company
such information regarding Cerner, the plan of distribution of the Registrable
Securities and other information as the Company may from time to time reasonably
request or as may be legally required in connection with such registration.

         SECTION 4.03 Indemnification. (a) The Company agrees to indemnify and
hold harmless Cerner, its employees, officers and directors, and each person, if
any, who controls Cerner within the meaning of either Section 15 of the
Securities Act or Section 20 of the Exchange Act from and against any and all
losses, claims, damages and liabilities caused by any untrue statement or
alleged untrue statement of a material fact contained in any registration
statement or prospectus relating to the Registrable Securities (as amended or
supplemented if the Parent shall have furnished any amendments or supplements
thereto) or any preliminary prospectus, or caused by any omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, except insofar as such
losses, claims, damages or liabilities are caused by any such untrue statement
or omission or alleged untrue statement or omission based upon information
furnished to the Company by or on behalf of Cerner; provided, however, that the
foregoing indemnity agreement with respect to any preliminary prospectus shall
not inure to the benefit of Cerner if a copy of the current prospectus was not
provided to a purchaser of the Registrable Securities and such current
prospectus would have cured the defect giving rise to such loss, claim, damage
or liability or for any sales occurring after the Company has informed Cerner
under Section 4.02(e) and prior to the delivery by the Company of any supplement
or amendment to such prospectus. The Company also agrees to indemnify any
underwriters of the Registrable Securities, their officers and directors and
each person who controls such underwriters on substantially the same basis as
that of the indemnification of Cerner provided in this Section 4.03(a).

         (b) Cerner agrees to indemnify and hold harmless the Company, its
officers and directors, and each person, if any, who controls the Company within
the meaning of either Section 15 of the Securities Act or Section 20 of the
Exchange Act to the same extent as the foregoing indemnity from the Company to
Cerner, but only with reference to information furnished by or on behalf of
Cerner for use in any registration statement or prospectus relating to the
Registrable Securities, or any amendment or supplement thereto, or any
preliminary prospectus. Cerner also agrees to indemnify and hold harmless any
underwriters of the Registrable Securities, their officers and directors and
each person who controls such underwriters 





                                       27

on substantially the same basis as that of the indemnification of the Company
provided in this Section 4.03(b) or on such other basis as such underwriters may
require.

         (c) Any person entitled to indemnification hereunder will (i) give
prompt notice to the indemnifying party of any claim with respect to which its
seeks indemnification (provided, however, that the failure to give notice as
provided herein shall not relieve the indemnifying party of its obligations
hereunder except to the extent that the indemnifying party is actually
prejudiced by such failure to give notice) and (ii) unless in such indemnified
party's reasonable judgment a conflict of interest may exist between such
indemnified and indemnifying parties with respect to such claim, permit such
indemnifying party to assume the defense of such claim with counsel reasonably
satisfactory to the indemnified party and in that case the indemnified party
shall have the right to participate in the conduct of such defense (provided,
however, that it will pay for the fees of its own counsel.) Whether or not such
defense is assumed by the indemnifying party, the indemnifying party will not be
subject to any liability for any settlement made without its consent (but such
consent will not be unreasonably withheld). No indemnifying party will consent
to entry of any judgment or enter into any settlement which does not include as
an unconditional term thereof the giving of the claimant or plaintiff to such
indemnified party of a release from all liability in respect to such claim or
litigation. An indemnifying party who is not entitled to, or elects not to,
assume the defense of a claim will not be obligated to pay the fees and expenses
of more than one counsel for all parties indemnified by such indemnifying party
with respect to such claim, unless in the reasonable judgment of any indemnified
party a conflict of interest may exist between such indemnified party and any
other such indemnified party with respect to such claim, in which event the
indemnifying party shall be obligated to pay the fees and expenses of such
counsel or counsels.

         SECTION 4.04. Contribution. (a) If the indemnification provided for in
Section 4.03 is unavailable to the indemnified parties in respect of any losses,
claims, damages or liabilities referred to herein, then each such indemnifying
party, in lieu of indemnifying such indemnified party, shall contribute to the
amount paid or payable by such indemnified party as a result of such losses,
claims, damages or liabilities, in such proportion as is appropriate to reflect
the relative fault of the Company, Cerner and the underwriters in connection
with the statements or omissions which resulted in such losses, claims, damages
or liabilities, as well as any other relevant equitable considerations. The
relative fault of the Company, Cerner and the underwriters shall be determined
by reference to, among other things, whether the untrue or alleged untrue
statement of a material fact or the omission or alleged omission to state a
material fact relates to information supplied by such party and the parties'
relative knowledge, access to information and opportunity to correct or prevent
such statement or omission.

         (b) The Company and Cerner agree that it would not be just and
equitable if contribution pursuant to this Section 4.04 were determined by pro
rata allocation (even if the underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to in Section 4.04(a). 





                                       28

The amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities referred to in Section 4.04(a) shall be deemed to
include, subject to the limitations set forth above, any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
Section 4.04, no underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the securities
underwritten by it and distributed to the public were offered to the public
exceeds the amount of any damages which such underwriter has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission, and Cerner shall not be required to contribute any amount
in excess of the amount by which the net proceeds of the offering (before
deducting expenses) received by Cerner exceeds the amount of any damages which
Cerner has otherwise been required to pay by reason of such untrue or alleged
untrue statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.

         SECTION 4.05. Right to Participate. If Avicenna, Synetic or any of
their Permitted Transferees sell any of their Capital Stock of the Company in
the Company's first Public Offering, Cerner shall have the right to include
within such Public Offering a number of Shares owned by Cerner and its
Affiliates equal to the total number of Shares owned by Cerner and its
Affiliates multiplied by a fraction the numerator of which shall be the number
of shares of Capital Stock to be sold by Avicenna, Synetic and any of their
Affiliates and Permitted Transferees and the denominator of which is the total
number of shares of Capital Stock owned by all of them. Cerner shall participate
in such Public Offering on the same basis as Avicenna, Synetic and their
Affiliates and Permitted Transferees.

         SECTION 4.06. No Assignment. No assignment of the registration rights
granted to Cerner in this Article IV, in whole or in part, shall be permitted to
any transferee of Registrable Securities other than a Permitted Transferee of
Cerner.


                                    ARTICLE V

                                  MISCELLANEOUS

         SECTION 5.01. Termination. Unless otherwise expressly provided herein,
the obligations of the parties hereto shall terminate on the later of the fifth
anniversary of the execution and delivery hereof or the date upon which Cerner
ceases to own any Common Stock.

         SECTION 5.02. Conflict with Certificate of Incorporation or By-laws of
the Company. In the event any provision of this Agreement conflicts with any
provision of the Certificate of Incorporation or the By-laws of the Company, the
terms of this Agreement shall 





                                       29

control, and each Stockholder shall vote all shares of Common Stock which it
holds of record, and shall take all actions necessary, to ensure that at all
times the Certificate of Incorporation and the By-laws of the Company do not
conflict with any provision of this Agreement.

         SECTION 5.03. Expenses. Except as otherwise specified in this
Agreement, all costs and expenses, including, without limitation, fees and
disbursements of counsel, financial advisors and accountants, incurred in
connection with this Agreement and the transactions contemplated hereby shall be
paid by the party incurring such costs and expenses, whether or not the Closing
shall have occurred.

         SECTION 5.04. Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given or made (and
shall be deemed to have been duly given or made upon receipt) by delivery in
person, by courier service, by telecopy or by registered or certified mail
(postage prepaid, return receipt requested) to the respective parties at the
following addresses (or at such other address for a party as shall be specified
in a notice given in accordance with this Section 5.04):

         (a) if to the Company:

         c/o Synetic, Inc.
         669 River Drive
         Elmwood Park, NJ   07407
         Telecopy No.: (201) 703-3401
         Attention:  General Counsel

         with a copy to:

         Shearman & Sterling
         599 Lexington Avenue
         New York, New York 10022
         Telecopy No.:  (212) 848-7179
         Attention:  Creighton O'M Condon, Esq.

         (b) if to Avicenna or Synetic:

         Synetic, Inc.
         669 River Drive
         Elmwood Park, NJ   07407
         Telecopy No.: (201) 703-3401
         Attention:  General Counsel






                                       30

         with a copy to:

         Shearman & Sterling
         599 Lexington Avenue
         New York, New York 10022
         Telecopy No.:  (212) 848-7179
         Attention:  Creighton O'M Condon, Esq.

         (c) if to Cerner:

         Cerner Corporation
         2800 Rockcreek Parkway
         Kansas City, Missouri 64117
         Telecopy:  (816) 474-1742
         Attention:  President

         with a copy to:

         Cerner Corporation
         2900 Rockcreeck Parkway
         Kansas City, Missouri 64117
         Telecopy No.: (816) 474-1742
         Attention: General Counsel

         SECTION 5.05. Public Announcements. Except as required by law,
governmental regulation or by the requirements of any securities exchange on
which the securities of a party hereto are listed, no party to this Agreement
shall make, or cause to be made, any press release or public announcement in
respect of this Agreement or the Ancillary Agreements or the transactions
contemplated hereby or otherwise communicate with any news media without the
prior written consent of the other party, and the parties shall cooperate as to
the timing and contents of any such press release or public announcement.

         SECTION 5.06. Headings. The descriptive headings contained in this
Agreement are for convenience of reference only and shall not affect in any way
the meaning or interpretation of this Agreement.

         SECTION 5.07. Severability. If any term or other provision of this
Agreement is invalid, illegal or incapable of being enforced by any law,
governmental regulation or public policy, all other terms and provisions of this
Agreement shall nevertheless remain in full force and effect so long as the
economic or legal substance of the transactions contemplated hereby is not
affected in any manner materially adverse to any party. Upon such determination
that any term or other provision is invalid, illegal or incapable of being
enforced, the parties hereto shall negotiate 




                                       31

in good faith to modify this Agreement so as to effect the original intent of
the parties as closely as possible in an acceptable manner in order that the
transactions contemplated hereby are consummated as originally contemplated to
the greatest extent possible.

         SECTION 5.08. Entire Agreement. This Agreement constitutes the entire
agreement of the parties hereto with respect to the subject matter hereof and
supersedes all prior agreements and undertakings, both written and oral, with
respect to the subject matter hereof.

         SECTION 5.09. Assignment. This Agreement shall not be assigned without
the express written consent of the parties (which consent may be granted or
withheld in the sole discretion of any party), except that any party hereto may
assign its rights hereunder to an Affiliate of such party; provided, however,
that any such assignment shall not relieve the assigning party of its
obligations hereunder; provided, further, however, that any party may, without
the written consent of any other party, assign and delegate this Agreement and
its rights and obligations hereunder in connection with a merger, consolidation
or sale of all or substantially all of its assets (which sale shall include the
assignment and assumption of all rights and obligations under the Ancillary
Agreements).

         SECTION 5.10. No Third Party Beneficiaries. This Agreement shall be
binding upon and inure solely to the benefit of the parties hereto and their
permitted assigns and successors and nothing herein, express or implied, is
intended to or shall confer upon any other person or entity, any legal or
equitable right, benefit or remedy of any nature whatsoever under or by reason
of this Agreement.

         SECTION 5.11. Amendment. This Agreement may not be amended or modified
except by an instrument in writing signed by, or on behalf of, each of the
parties.

         SECTION 5.12. Governing Law. This Agreement shall be governed by the
laws of the State of New York.

         SECTION 5.13. Counterparts. This Agreement may be executed in one or
more counterparts, and by the different parties hereto in separate counterparts,
each of which when executed shall be deemed to be an original but all of which
taken together shall constitute one and the same agreement.

         SECTION 5.14. Specific Performance. The parties hereto agree that
irreparable damage would occur in the event any provision of this Agreement was
not performed in accordance with the terms hereof and that the parties shall be
entitled to specific performance of the terms hereof, in addition to any other
remedy at law or equity.






                                       32

         SECTION 5.15. Payments. Except as otherwise provided herein, all
payments to be made in cash pursuant to this Agreement shall be made by
certified check or by wire transfer of immediately available funds to an account
designated by the recipient of such payment.

         SECTION 5.16. Waiver of Jury Trial. Each of the parties hereto
irrevocably and unconditionally waives trial by jury in any legal action or
proceeding relating to this Agreement, the Ancillary Agreements or the
transactions contemplated hereby and thereby and for any counterclaim therein.






                                       33

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized signatories thereunto duly
authorized as of the day and year first above written.



                                          SYNETIC HEALTHCARE
                                          COMMUNICATIONS, INC.


                                          By
                                              -------------------------------
                                              Name:
                                              Title:


                                          AVICENNA SYSTEMS CORPORATION


                                          By
                                              -------------------------------
                                              Name:
                                              Title:


                                          SYNETIC, INC.


                                          By
                                              -------------------------------
                                              Name:
                                              Title:


                                          CERNER CORPORATION


                                          By
                                              -------------------------------
                                              Name:
                                              Title: