<PAGE>   1

                                                                     EXHIBIT 4.2

                          REGISTRATION RIGHTS AGREEMENT


                  This Registration Rights Agreement (this "Agreement") is made
and entered into as of March 22, 2000, among CAM Data Systems, Inc., a
corporation organized under the laws of the State of Delaware (the "Company"),
and each of the Purchasers listed on Schedule A attached hereto. Each of the
Purchasers listed on Schedule A attached hereto is referred to herein as a
"Purchaser" and are collectively referred to herein as the "Purchasers."

                  WHEREAS, the Company is issuing and selling to the Purchasers
and the Purchasers are purchasing from the Company, pursuant to a Units Purchase
Agreement, dated as of the date hereof (the "Purchase Agreement"), between the
Company and the Purchasers, an aggregate value of $8,000,000 of the Company's
Common Stock (as defined below) and Warrants (as defined in the Purchase
Agreement) to purchase up to 350,000 shares of Common Stock; and

                  WHEREAS, the Company desires to grant to the Purchasers
registration rights as set forth herein with respect to the shares of Common
Stock being purchased under the Purchase Agreement and the shares of Common
Stock issuable upon exercise of the Warrants.

                  The Company and the Purchasers hereby agree as follows:

                  1. Definitions.

                  Capitalized terms used and not otherwise defined herein shall
have the meanings given to such terms in the Purchase Agreement. As used in this
Agreement, the following terms shall have the following meanings:

                  "Advice" shall have the meaning set forth in Section 3(m).

                  "Affiliate" means, with respect to any Person, any other
Person that directly or indirectly controls or is controlled by or under common
control with such Person. For the purposes of this definition, "control," when
used with respect to any Person, means the possession, direct or indirect, of
the power to direct or cause the direction of the management and policies of
such Person, whether through the ownership of voting securities, by contract or
otherwise; and the terms of "affiliated," "controlling" and "controlled" have
meanings correlative to the foregoing.

                  "Blackout Period" shall have the meaning set forth in Section
3(n).

                  "Board" shall have the meaning set forth in Section 3(n).

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                  "Business Day" means any day except Saturday, Sunday and any
day which shall be a legal holiday or a day on which banking institutions in the
state of California generally are authorized or required by law or other
government actions to close.

                  "Commission" means the Securities and Exchange Commission.

                  "Common Stock" means the Company's common stock, $.001 par
value per share.

                  "Effectiveness Date" means with respect to the Registration
Statement the earlier of the 120th day following the Tranche I Closing Date and
the date which is within five (5) days of the date on which the Commission
informs the Company that the Commission (i) will not review the Registration
Statement or (ii) that the Company may request the acceleration of the
effectiveness of the Registration Statement.

                  "Effectiveness Period" shall have the meaning set forth in
Section 2.

                  "Event" shall have the meaning set forth in Section 7(e).

                  "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

                  "Filing Date" means the date the Registration Statement is
filed, which Filing Date shall be no later than 30 days after the Tranche I
Closing Date.

                  "Holder" or "Holders" means the holder or holders, as the case
may be, from time to time of Registrable Securities, including without
limitation the Purchasers and their assignees.

                  "Indemnified Party" shall have the meaning set forth in
Section 5(c).

                  "Indemnifying Party" shall have the meaning set forth in
Section 5(c).

                  "Liquidated Damages" shall have the meaning set forth in
Section 7(e).

                  "Losses" shall have the meaning set forth in Section 5(a).

                  "NASDAQ" means the National Association of Securities Dealers
Automated Quotation System.

                  "Person" means an individual or a corporation, partnership,
trust, incorporated or unincorporated association, joint venture, limited
liability company, joint stock company, government (or an agency or political
subdivision thereof) or other entity of any kind.

                  "Proceeding" means an action, claim, suit, investigation or
proceeding (including, without limitation, an investigation or partial
proceeding, such as a deposition), whether commenced or threatened.


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                  "Prospectus" means the prospectus included in the Registration
Statement (including, without limitation, a prospectus that includes any
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A promulgated under the
Securities Act), as amended or supplemented by any prospectus supplement, with
respect to the terms of the offering of any portion of the Registrable
Securities covered by the Registration Statement, and all other amendments and
supplements to the Prospectus, including post-effective amendments, and all
material incorporated by reference in such Prospectus.

                  "Registrable Securities" means (i) the shares of Common Stock
(A) issued pursuant to the Purchase Agreement (the "Common Shares"), (B)
issuable upon exercise of the Warrants (the "Warrant Shares") and (C) issued to
the placement agent as payment of fees in connection with the structuring of the
sale of Units, and upon any stock split, stock dividend, recapitalization or
similar event with respect to such Common Shares and Warrant Shares, and (ii)
any other dividend or other distribution with respect to, conversion or exchange
of, or in replacement of, Registrable Securities; provided, however, that
Registrable Securities shall include (but not be limited to) a number of shares
of Common Stock equal to no less than 100% of the maximum number of shares of
Common Stock which would be issuable pursuant to the issuance of the Common
Shares pursuant to the Purchase Agreement and upon exercise of the Warrants,
assuming such exercise occurred on the Closing Date or the Filing Date,
whichever date would result in the greater number of Registrable Securities.
Notwithstanding anything herein contained to the contrary, such registered
shares of Common Stock shall be allocated among the Holders pro rata based on
the total number of Registrable Securities issued or issuable as of each date
that a Registration Statement, as amended, relating to the resale of the
Registrable Securities is declared effective by the Commission. Notwithstanding
anything contained herein to the contrary, if the actual number of shares of
Common Stock issuable (A) pursuant to the issuance of the Common Shares pursuant
to the Purchase Agreement and (B) upon exercise of the Warrants, exceeds 100% of
the number of shares of Common Stock issuable (1) pursuant to the issuance of
the Common Shares pursuant to the Purchase Agreement and (2) upon exercise of
the Warrants based upon a computation as at the Closing Date or the Filing Date,
the term "Registrable Securities" shall be deemed to include such additional
shares of Common Stock.

                  "Registration Statement" means the registration statement and
any additional registration statements contemplated by Section 2, including (in
each case) the Prospectus, amendments and supplements to such registration
statement or Prospectus, including pre- and post-effective amendments, all
exhibits thereto, and all material incorporated by reference in such
registration statement.

                  "Rule 144" means Rule 144 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time,
or any similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.


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                  "Rule 158" means Rule 158 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time,
or any similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

                  "Rule 415" means Rule 415 promulgated by the Commission
pursuant to the Securities Act, as such Rule may be amended from time to time,
or any similar rule or regulation hereafter adopted by the Commission having
substantially the same effect as such Rule.

                  "Securities Act" means the Securities Act of 1933, as amended.

                  "Special Counsel" means any special counsel to the Holders,
for which the Holders will be reimbursed by the Company pursuant to Section 4.

                  "Strategic Business Partner" means (i) an individual who, or
an entity which, introduces the Company to third parties in connection with
potential business arrangements or joint ventures, builds business relationships
with strategic business partners and expands business opportunities, or (ii) an
entity which enters into a strategic alliance, joint venture, partnership or
similar arrangement with the Company, the primary purpose of which is not to
raise equity capital.

         2. Registration. On or prior to the Filing Date the Company shall
prepare and file with the Commission a "shelf" Registration Statement covering
all Registrable Securities for an offering to be made on a continuous basis
pursuant to Rule 415, provided, however, that the Company shall not be required
to register any Registrable Securities pursuant to this Section 2 that are
eligible for sale pursuant to Rule 144(k) of the Securities Act. The
Registration Statement shall be on Form S-3 (or on another form appropriate for
such registration in accordance herewith). The Company shall (i) not permit any
securities other than the Registrable Securities to be included in the
Registration Statement and (ii) use its best efforts to cause the Registration
Statement to be declared effective under the Securities Act (including filing
with the Commission a request for acceleration of effectiveness in accordance
with Rule 12dl-2 promulgated under the Exchange Act within five (5) Business
Days of the date that the Company is notified (orally or in writing, whichever
is earlier) by the Commission that a Registration Statement will not be
"reviewed," or not be subject to further review) within ninety (90) days from
the Tranche I Closing Date, but in any event prior to the Effectiveness Date,
and to keep such Registration Statement continuously effective under the
Securities Act until such date as is the earlier of (x) the date when all
Registrable Securities covered by such Registration Statement have been sold or
(y) the date on which the Registrable Securities may be sold without any
restriction pursuant to Rule 144(k) as determined by the counsel to the Company
pursuant to a written opinion letter, addressed to the Company's transfer agent
to such effect (the "Effectiveness Period"). If an additional Registration
Statement is required, for any reason, to be filed because the actual number of
shares of Common Shares and Warrant Shares, exceeds the number of shares of
Common Stock initially registered in respect of the Common Shares and the
Warrant Shares based upon the computation on the Closing Date, the Company shall
have twenty (20) Business Days to file such additional Registration Statement,
and the Company shall


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use its best efforts to cause such additional Registration Statement to be
declared effective by the Commission as soon as possible, but in no event later
than forty-five (45) days after filing.

         3. Registration Procedures.

                  In connection with the Company's registration obligations
hereunder, the Company shall:

                  (a) Prepare and file with the Commission on or prior to the
Filing Date, a Registration Statement on Form S-3 (or on another form
appropriate for such registration in accordance herewith) in accordance with the
method or methods of distribution thereof as specified by the Holders (except if
otherwise directed by the Holders), and cause the Registration Statement to
become effective and remain effective as provided herein; provided, however,
that not less than five (5) Business Days prior to the filing of the
Registration Statement or any related Prospectus or any amendment or supplement
thereto (including any document that would be incorporated therein by
reference), the Company shall (i) furnish to the Special Counsel, copies of all
such documents proposed to be filed, which documents (other than those
incorporated by reference) will be subject to the review of such Holders and
such Special Counsel, and (ii) at the request of any Holder cause its officers
and directors, counsel and independent certified public accountants to respond
to such inquiries as shall be necessary, in the reasonable opinion of counsel to
such Holders, to conduct a reasonable investigation within the meaning of the
Securities Act. The Company shall not file the Registration Statement or any
such Prospectus or any amendments or supplements thereto to which the Holders of
a majority of the Registrable Securities or any Special Counsel shall reasonably
object in writing within three (3) Business Days of their receipt thereof.
Notwithstanding anything to the contrary contained herein, the Filing Date
and/or Effectiveness Date shall be tolled for such period of review of, and/or
objection to, the Registration Statement, if any, by the Holders or Special
Counsel. These dates shall also be tolled if the SEC ceases to permit the use of
Form S-3 to register all of the Common Shares and Warrant Shares for resale
prior to issuance of all such Shares as is contemplated hereby.

                  (b) (i) Prepare and file with the Commission such amendments,
including post-effective amendments, to the Registration Statement as may be
necessary to keep the Registration Statement continuously effective as to the
applicable Registrable Securities for the Effectiveness Period and prepare and
file with the Commission such additional Registration Statements in order to
register for resale under the Securities Act all of the Registrable Securities;
(ii) cause the related Prospectus to be amended or supplemented by any required
Prospectus supplement, and as so supplemented or amended to be filed pursuant to
Rule 424 (or any similar provisions then in force) promulgated under the
Securities Act; (iii) respond as promptly as possible to any comments received
from the Commission with respect to the Registration Statement or any amendment
thereto and as promptly as possible provide the Holders' Special Counsel true
and complete copies of all correspondence from and to the Commission relating to
the Registration Statement; and (iv) comply in all material respects with


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the provisions of the Securities Act and the Exchange Act with respect to the
disposition of all Registrable Securities covered by the Registration Statement
during the applicable period in accordance with the intended methods of
disposition by the Holders thereof set forth in the Registration Statement as so
amended or in such Prospectus as so supplemented.

                  (c) Notify the Special Counsel as promptly as possible (and,
in the case of (i)(A) below, not less than five (5) Business Days prior to such
filing) and (if requested by any such Person) confirm such notice in writing no
later than one (1) Business Day following the day (i)(A) when a Prospectus or
any Prospectus supplement or post-effective amendment to the Registration
Statement is proposed to be filed; (B) when the Commission notifies the Company
whether there will be a "review" of such Registration Statement and whenever the
Commission comments in writing on such Registration Statement and (C) with
respect to the Registration Statement or any post-effective amendment, when the
same has become effective; (ii) of any request by the Commission or any other
Federal or state governmental authority for amendments or supplements to the
Registration Statement or Prospectus or for additional information; (iii) of the
issuance by the Commission of any stop order suspending the effectiveness of the
Registration Statement covering any or all of the Registrable Securities or the
initiation of any Proceedings for that purpose; (iv) if at any time any of the
representations and warranties of the Company contained in any agreement
contemplated hereby ceases to be true and correct in all material respects; (v)
of the receipt by the Company of any notification with respect to the suspension
of the qualification or exemption from qualification of any of the Registrable
Securities for sale in any jurisdiction, or the initiation or threatening of any
Proceeding for such purpose; and (vi) of the occurrence of any event that makes
any statement made in the Registration Statement or Prospectus or any document
incorporated or deemed to be incorporated therein by reference untrue in any
material respect or that requires any revisions to the Registration Statement,
Prospectus or other documents so that, in the case of the Registration Statement
or the Prospectus, as the case may be, it will not contain any 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.

                  The Company shall promptly furnish to Special Counsel, without
charge, (i) any correspondence from the Commission or the Commission's staff to
the Company or its representatives relating to any Registration Statement and
(ii) promptly after the same is prepared and filed with the Commission, a copy
of any written response to the correspondence received from the Commission.

                  (d) Use its best efforts to avoid the issuance of, or, if
issued, obtain the withdrawal of, (i) any order suspending the effectiveness of
the Registration Statement or (ii) any suspension of the qualification (or
exemption from qualification) of any of the Registrable Securities for sale in
any jurisdiction, at the earliest practicable moment.

                  (e) If requested by the Holders of a majority in interest of
the Registrable Securities, (i) promptly incorporate in a Prospectus supplement
or post-effective amendment to


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the Registration Statement such information as the Company reasonably agrees
should be included therein and (ii) make all required filings of such Prospectus
supplement or such post-effective amendment as soon as practicable after the
Company has received notification of the matters to be incorporated in such
Prospectus supplement or post-effective amendment.

                  (f) Promptly deliver to each Holder and any Special Counsel,
without charge, as many copies of the Registration Statement, Prospectus or
Prospectuses (including each form of prospectus) and each amendment or
supplement thereto as such Persons may reasonably request; and the Company
hereby consents to the use of such Prospectus and each amendment or supplement
thereto by each of the selling Holders in connection with the offering and sale
of the Registrable Securities covered by such Prospectus and any amendment or
supplement thereto.

                  (h) Prior to any public offering of Registrable Securities,
use its best efforts to register or qualify or cooperate with the selling
Holders and any Special Counsel in connection with the registration or
qualification (or exemption from such registration or qualification) of such
Registrable Securities for offer and sale under the securities or Blue Sky laws
of such jurisdictions within the United States as the Holders of a majority of
the Registrable Securities reasonably request in writing (in light of their
intended plan of distribution), to keep each such registration or qualification
(or exemption therefrom) effective during the Effectiveness Period and to do any
and all other acts or things necessary or advisable to enable the disposition in
such jurisdictions of the Registrable Securities covered by a Registration
Statement; provided, however, that the Company shall not be required to qualify
generally to do business in any jurisdiction where it is not then so qualified
or to take any action that would subject it to general service of process in any
such jurisdiction where it is not then so subject or subject the Company to any
material tax in any such jurisdiction where it is not then so subject.

                  (i) Following the effectiveness of the Registration Statement,
cooperate with the Holders to facilitate the timely preparation and delivery of
certificates representing Registrable Securities to be sold pursuant to a
Registration Statement, which certificates shall be free of all restrictive
legends, and to enable such Registrable Securities to be in such denominations
and registered in such names as any Holder may request prior to any sale of
Registrable Securities.

                  (j) Upon the occurrence of any event contemplated by Section
3(c)(vi), as promptly as possible, prepare a supplement or amendment, including
a post-effective amendment, to the Registration Statement or a supplement to the
related Prospectus or any document incorporated or deemed to be incorporated
therein by reference, and file any other required document so that, as
thereafter delivered, neither the Registration Statement nor such Prospectus
will contain an untrue statement of a material fact or omit to state a 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.

                  (k) Use its best efforts to cause all Registrable Securities
relating to such Registration Statement to be listed on NASDAQ or any other
stock exchange on which similar


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securities issued by the Company are then listed as and when required pursuant
to the Purchase Agreement.

                  (l) Comply in all material respects with all applicable rules
and regulation of the Commission and make generally available to its security
holders earning statements satisfying the provisions of Section 11(a) of the
Securities Act and Rule 158 not later than forty-five (45) days after the end of
any twelve (12) month period (or ninety (90) days after the end of any twelve
(12) month period if such period is a fiscal year) commencing on the first day
of the first fiscal quarter of the Company after the effective date of the
Registration Statement, which statement shall conform to the requirements of
Rule 158.

                  (m) Require each selling Holder to furnish to the Company
information regarding such Holder and the distribution of such Registrable
Securities as is required by law to be disclosed in the Registration Statement,
and the Company may exclude from such registration the Registrable Securities of
any such Holder who fails to furnish such information within a reasonable time
prior to the filing of each Registration Statement, supplemented Prospectus
and/or amended Registration Statement.

                  If the Registration Statement refers to any Holder by name or
otherwise as the holder of any securities of the Company, then such Holder shall
have the right to require (if such reference to such Holder by name or otherwise
is not required by the Securities Act or any similar federal statute then in
force) the deletion of the reference to such Holder in any amendment or
supplement to the Registration Statement filed or prepared subsequent to the
time that such reference ceases to be required.

                  Each Holder covenants and agrees that (i) it will not sell any
Registrable Securities under the Registration Statement until it has received
copies of the Prospectus as then amended or supplemented as contemplated in
Section 3(g) and notice from the Company that such Registration Statement and
any post-effective amendments thereto have become effective as contemplated by
Section 3(c) and (ii) it and its officers, directors or Affiliates, if any, will
comply with the prospectus delivery requirements of the Securities Act as
applicable to them in connection with sales of Registrable Securities pursuant
to the Registration Statement.

                  Each Holder agrees by its acquisition of such Registrable
Securities that, upon receipt of a notice from the Company of the occurrence of
any event of the kind described in Section 3(c)(ii), 3(c)(iii), 3(c)(iv),
3(c)(v) or 3(c)(vi), such Holder will forthwith discontinue disposition of such
Registrable Securities under the Registration Statement until such Holder's
receipt of the copies of the supplemented Prospectus and/or amended Registration
Statement contemplated by Section 3(j), or until it is advised in writing (the
"Advice") by the Company that the use of the applicable Prospectus may be
resumed, and, in either case, has received copies of any additional or
supplemental filings that are incorporated or deemed to be incorporated by
reference in such Prospectus or Registration Statement.


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                  (n) If (i) there is material non-public information regarding
the Company which the Company's Board of Directors (the "Board") reasonably
determines not to be in the Company's best interest to disclose and which the
Company is not otherwise required to disclose, or (ii) there is a significant
business opportunity (including, but not limited to, the acquisition or
disposition of assets (other than in the ordinary course of business) or any
merger, consolidation, tender offer or other similar transaction) available to
the Company which the Board reasonably determines not to be in the Company's
best interest to disclose and which the Company would be required to disclose
under the Registration Statement, then the Company may suspend effectiveness of
a registration statement and suspend the sale of Registrable Securities under a
Registration Statement for a period not to exceed ninety (90) consecutive days,
provided that the Company may not suspend its obligation under this Section 3(n)
for more than one hundred and twenty (120) days in the aggregate during any
twelve (12) month period (each, a "Blackout Period").

         4. Registration Expenses

                  Except for any underwriting fees and discounts and selling
commissions applicable to the sale of Registrable Securities sold by the
Holders, all of which shall be paid by the Holders, all fees and expenses
incident to the performance of or compliance with this Agreement by the Company
shall be borne by the Company whether or not the Registration Statement is filed
or becomes effective and whether or not any Registrable Securities are sold
pursuant to the Registration Statement. The fees and expenses referred to in the
foregoing sentence shall include, without limitation, (i) all registration and
filing fees (including, without limitation, fees and expenses (A) with respect
to filings required to be made with NASDAQ and each other securities exchange or
market on which Registrable Securities are required hereunder to be listed, (B)
with respect to filings required to be made with the Commission, and (C) in
compliance with state securities or Blue Sky laws (including, without
limitation, reasonable fees and disbursements of Special Counsel for the
Holders, subject to Section 4(iii) herein, in connection with Blue Sky
qualifications of the Registrable Securities and determination of the
eligibility of the Registrable Securities for investment under the laws of such
jurisdictions as the Holders of a majority of Registrable Securities may
designate)), (ii) printing expenses (including, without limitation, expenses of
printing certificates for Registrable Securities and of printing prospectuses if
the printing of prospectuses is requested by the holders of a majority of the
Registrable Securities included in the Registration Statement), (iii) messenger,
telephone and delivery expenses, (iv) fees and disbursements of counsel for the
Company and one Special Counsel for the Holders, in the case of the Special
Counsel, to a maximum amount of $15,000, (v) Securities Act liability insurance,
if the Company so desires such insurance, and (vi) fees and expenses of all
other Persons retained by the Company in connection with the consummation of the
transactions contemplated by this Agreement, including, without limitation, the
Company's independent public accountants (including the expenses of any comfort
letters or costs associated with the delivery by independent public accountants
of a comfort letter or comfort letters). In addition, the Company shall be
responsible for all of its internal expenses incurred in connection with the
consummation of the transactions contemplated by this Agreement (including,
without limitation, all salaries and expenses of its officers and employees
performing legal or accounting


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duties), the expense of any annual audit, the fees and expenses incurred in
connection with the listing of the Registrable Securities on any securities
exchange as required hereunder.

         5. Indemnification

                  (a) Indemnification by the Company. The Company shall,
notwithstanding any termination of this Agreement, indemnify and hold harmless
each Holder, the officers, directors, agents and employees of each of them, each
Person who controls any such Holder (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) and the officers, directors,
agents and employees of each such controlling Person, to the fullest extent
permitted by applicable law, from and against any and all losses, claims,
damages, liabilities, costs (including, without limitation, costs of preparation
and attorneys' fees) and expenses (collectively, "Losses"), as incurred, arising
out of or relating to any untrue or alleged untrue statement of a material fact
contained in the Registration Statement, any Prospectus or any form of
prospectus or in any amendment or supplement thereto or in any preliminary
prospectus, or arising out of or relating to any omission or alleged omission of
a material fact required to be stated therein or necessary to make the
statements therein (in the case of any Prospectus or form of prospectus or
supplement thereto, in the light of the circumstances under which they were
made) not misleading, except to the extent, but only to the extent, that such
untrue statements or omissions are based solely upon information regarding such
Holder furnished in writing to the Company by such Holder expressly for use
therein, which information was reasonably relied on by the Company for use
therein. The Company shall notify the Holders promptly of the institution,
threat or assertion of any Proceeding of which the Company is aware in
connection with the transactions contemplated by this Agreement. Such indemnity
shall remain in full force and effect regardless of any investigation made by or
on behalf of an Indemnified Party (as defined in Section 5(c) to this Agreement)
and shall survive the transfer of the Registrable Securities by the Holders.

                  (b) Indemnification by Holders. Each Holder shall, severally
and not jointly, indemnify and hold harmless the Company, the directors,
officers, agents and employees, each Person who controls the Company (within the
meaning of Section 15 of the Securities Act and Section 20 of the Exchange Act),
and the directors, officers, agents or employees of such controlling Persons, to
the fullest extent permitted by applicable law, from and against all Losses, as
incurred, arising solely out of or based solely upon any untrue statement of a
material fact contained in the Registration Statement, any Prospectus, or any
form of prospectus, or arising solely out of or based solely upon any omission
of a material fact required to be stated therein or necessary to make the
statements therein (in the case of any Prospectus or form of prospectus or
supplement thereto, in the light of the circumstances under which they were
made) not misleading, to the extent, but only to the extent, that such untrue
statement or omission is contained in or omitted from any information so
furnished in writing by such Holder to the Company specifically for inclusion in
the Registration Statement or such Prospectus and that such information was
reasonably relied upon by the Company for use in the Registration Statement,
such Prospectus or such form of prospectus. Notwithstanding anything to the
contrary contained herein, the Holder shall be liable under this Section 5(b)
for only that amount


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as does not exceed the net proceeds to such Holder as a result of the sale of
Registrable Securities pursuant to such Registration Statement.

                  (c) Conduct of Indemnification Proceedings. If any Proceeding
shall be brought or asserted against any Person entitled to indemnity hereunder
(an "Indemnified Party"), such Indemnified Party promptly shall notify the
Person from whom indemnity is sought (the "Indemnifying Party) in writing, and
the Indemnifying Party shall assume the defense thereof, including the
employment of counsel reasonably satisfactory to the Indemnified Party and the
payment of all fees and expenses incurred in connection with defense thereof;
provided, that the failure of any Indemnified Party to give such notice shall
not relieve the Indemnifying Party of its obligations or liabilities pursuant to
this Agreement, except (and only) to the extent that it shall be finally
determined by a court of competent jurisdiction (which determination is not
subject to appeal or further review) that such failure shall have proximately
and materially adversely prejudiced the Indemnifying Party.

                  An Indemnified Party shall have the right to employ separate
counsel in any such Proceeding and to participate in the defense thereof, but
the fees and expenses of such counsel shall be at the expense of such
Indemnified Party or Parties unless: (1) the Indemnifying Party has agreed in
writing to pay such fees and expenses; or (2) the Indemnifying Party shall have
failed promptly to assume the defense of such Proceeding and to employ counsel
reasonably satisfactory to such Indemnified Party in any such Proceeding; or (3)
the named parties to any such Proceeding (including any impleaded parties)
include both such Indemnified Party and the Indemnifying Party, and such
Indemnified Party shall have been advised by counsel that a conflict of interest
is likely to exist if the same counsel were to represent such Indemnified Party
and the Indemnifying Party (in which case, if such Indemnified Party notifies
the Indemnifying Party in writing that it elects to employ separate counsel at
the expense of the Indemnifying Party, the Indemnifying Party shall not have the
right to assume the defense thereof and such counsel shall be at the expense of
the Indemnifying Party). The Indemnifying Party shall not be liable for any
settlement of any such Proceeding effected without its written consent, which
consent shall not be unreasonably withheld. No Indemnifying Party shall, without
the prior written consent of the Indemnified Party, effect any settlement of any
pending Proceeding in respect of which any Indemnified Party is a party, unless
such settlement includes an unconditional release of such Indemnified Party from
all liability on claims that are the subject matter of such Proceeding.

                  All fees and expenses of the Indemnified Party (including
reasonable fees and expenses to the extent incurred in connection with
investigating or preparing to defend such Proceeding in a manner not
inconsistent with this Section) shall be paid to the Indemnified Party, as
incurred, within ten (10) Business Days of written notice thereof to the
Indemnifying Party (regardless of whether it is ultimately determined that an
Indemnified Party is not entitled to indemnification hereunder; provided, that
the Indemnifying Party may require such Indemnified Party to undertake to
reimburse all such fees and expenses to the extent it is finally judicially
determined that such Indemnified Party is not entitled to indemnification
hereunder).


                                      -11-
<PAGE>   12

                  (d) Contribution. If a claim for indemnification under Section
5(a) or 5(b) is unavailable to an Indemnified Party because of a failure or
refusal of a governmental authority to enforce such indemnification in
accordance with its terms (by reason of public policy or otherwise), then each
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, in such proportion as is appropriate to reflect the relative
fault of the Indemnifying Party and Indemnified Party in connection with the
actions, statements or omissions that resulted in such Losses as well as any
other relevant equitable considerations. The relative fault of such Indemnifying
Party and Indemnified Party shall be determined by reference to, among other
things, whether any action in question, including any untrue or alleged untrue
statement of a material fact or omission or alleged omission of a material fact,
has been taken or made by, or relates to information supplied by, such
Indemnifying Party or Indemnified Party, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
action, statement or omission. The amount paid or payable by a party as a result
of any Losses shall be deemed to include, subject to the limitations set forth
in Section 5(c), any reasonable attorneys' or other reasonable fees or expenses
incurred by such party in connection with any Proceeding to the extent such
party would have been indemnified for such fees or expenses if the
indemnification provided for in this Section was available to such party in
accordance with its terms. Notwithstanding anything to the contrary contained
herein, each Holder shall be liable or required to contribute under this Section
5(c) for only that amount as does not exceed the net proceeds to such Holder as
a result of the sale of Registrable Securities pursuant to such Registration
Statement.

                  The parties hereto agree that it would not be just and
equitable if contribution pursuant to this Section 5(d) were determined by pro
rata allocation or by any other method of allocation that does not take into
account the equitable considerations referred to in the immediately preceding
paragraph. 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.

                  The indemnity and contribution agreements contained in this
Section are in addition to any liability that the Indemnifying Parties may have
to the Indemnified Parties.


                                      -12-
<PAGE>   13

         6. Rule 144.

                  As long as any Holder owns Common Shares, Warrants or Warrant
Shares, the Company covenants to timely file (or obtain extensions in respect
thereof and file within the applicable grace period) all reports required to be
filed by the Company after the date hereof pursuant to Section 13(a) or 15(d) of
the Exchange Act and, if such reports have not been filed by the Company with
the Commission pursuant to the Commission's "electronic data gathering and
retrieval" (EDGAR) service, to promptly furnish the Holders with true and
complete copies of all such filings. As long as any Holder owns Common Shares,
Warrants or Warrant Shares, if the Company is not required to file reports
pursuant to Section 13(a) or 15(d) of the Exchange Act, it will prepare and
furnish to the Holders and make publicly available in accordance with Rule
144(c) promulgated under the Securities Act annual and quarterly financial
statements, together with a discussion and analysis of such financial statements
in form and substance substantially similar to those that would otherwise be
required to be included in reports required by Section 13(a) or 15(d) of the
Exchange Act, as well as any other information required thereby, in the time
period that such filings would have been required to have been made under the
Exchange Act. The Company further covenants that it will take such further
action as any Holder may reasonably request, all to the extent required from
time to time to enable such Person to sell Common Shares and Warrant Shares
without registration under the Securities Act within the limitation of the
exemptions provided by Rule 144 promulgated under the Securities Act, including
compliance with the provisions of the Purchase Agreement relating to the
transfer of the Common Shares and Warrant Shares. Upon the request of any
Holder, the Company shall deliver to such Holder a written certification of a
duly authorized officer as to whether it has complied with such requirements.

         7. Miscellaneous.

                  (a) Remedies. In the event of a breach by the Company or by a
Holder, of any of their obligations under this Agreement, each Holder or the
Company, as the case may be, in addition to being entitled to exercise all
rights granted by law and under this Agreement, including recovery of damages,
will be entitled to specific performance of its rights under this Agreement. The
Company and each Holder agree that monetary damages would not provide adequate
compensation for any losses incurred by reason of a breach by it of any of the
provisions of this Agreement and hereby further agrees that, in the event of any
action for specific performance in respect of such breach, it shall waive the
defense that a remedy at law would be adequate.

                  (b) No Inconsistent Agreements. Neither the Company nor any of
its subsidiaries shall on or after the date of this Agreement, enter into any
agreement, except with a Strategic Business Partner, with respect to its
securities that is inconsistent with the rights granted to the Holders in this
Agreement or otherwise conflicts with the provisions hereof. Neither the Company
nor any of its subsidiaries has previously entered into any agreement currently
in effect granting any registration rights with respect to any of its securities
to any Person, except the Cubig Group LLC. Without limiting the generality of
the foregoing, without


                                      -13-
<PAGE>   14

the written consent of the Holders of a majority of the then outstanding
Registrable Securities, the Company shall not grant to any Person other than to
a Strategic Business Partner the right to request the Company to register any
securities of the Company under the Securities Act unless the rights so granted
are subject in all respects to the prior rights in full of the Holders set forth
herein, and are not otherwise in conflict with the provisions of this Agreement.

                  (c) No Piggyback on Registrations. Neither the Company nor any
of its security holders (other than the holders of any registration rights as
set forth on Schedule 7(b) hereto and the Holders in such capacity pursuant
hereto) may include securities of the Company in the Registration Statement, and
the Company shall not after the date hereof enter into any agreement, except
with a Strategic Business Partner, providing such right to any of its security
holders, unless the right so granted is subject in all respects to the prior
rights in full of the Holders set forth herein, and is not otherwise in conflict
with the provisions of this Agreement.

                  (d) Piggy-Back Registrations; Underwritten Offerings. If at
any time when there is not an effective Registration Statement covering (i)
Common Shares or (ii) Warrant Shares, the Company shall determine to prepare and
file with the Commission a registration statement relating to an offering for
its own account or the account of others under the Securities Act of any of its
equity securities, other than on Form S-4 or Form S-8 (each as promulgated under
the Securities Act) or its then equivalents relating to equity securities to be
issued solely in connection with any acquisition of any entity or business or
equity securities issuable in connection with stock option or other employee
benefit plans, the Company shall send to each holder of Registrable Securities
written notice of such determination and, if within 30 days after receipt of
such notice, any such holder shall so request in writing (which request shall
specify the Registrable Securities intended to be disposed of by the Holders),
the Company will cause the registration under the Securities Act of all
Registrable Securities which the Company has been so requested to register by
the holder, to the extent requisite to permit the disposition of the Registrable
Securities so to be registered. In any underwritten registration pursuant to
this Section 7(d), the Company shall have the exclusive right to select the
investment bankers and managing underwriters for such registered offering and to
negotiate the underwriting or similar agreement. If at any time after giving
written notice of its intention to register any securities and prior to the
effective date of the registration statement filed in connection with such
registration, the Company shall determine for any reason not to register or to
delay registration of such securities, the Company may, at its election, give
written notice of such determination to such holder and, thereupon, (i) in the
case of a determination not to register, shall be relieved of its obligation to
register any Registrable Securities in connection with such registration (but
not from its obligation to pay expenses in accordance with Section 4 hereof),
and (ii) in the case of a determination to delay registering, shall be permitted
to delay registering any Registrable Securities being registered pursuant to
this Section 7(d) for the same period as the delay in registering such other
securities. The Company shall include in such registration statement all or any
part of such Registrable Securities such holder requests to be registered;
provided, however, that the Company shall not be required to register any
Registrable Securities pursuant to this Section 7(d) that are eligible for sale
pursuant to Rule 144(k) of the Securities Act.


                                      -14-
<PAGE>   15

                  In connection with any offering involving an underwriting of
shares being issued by the Company, the Company shall not be required under this
Section 7 to include any of the Registrable Securities in such underwriting
unless the Holders accept the terms of the underwriting as agreed upon between
the Company and the underwriter selected by the Company and all other
shareholders participating in such offering. In the case of an underwritten
public offering, if the managing underwriter(s) or underwriter(s) should
reasonably object to the inclusion of the Registrable Securities in such
registration statement, then if the Company after consultation with the managing
underwriter should reasonably determine that the inclusion of such Registrable
Securities, would materially adversely affect the offering contemplated in such
registration statement, and based on such determination recommends inclusion in
such registration statement of fewer or none of the Registrable Securities of
the Holders, then (x) the number of Registrable Securities of the Holders
included in such registration statement shall be reduced pro-rata among such
Holders (based upon the number of Registrable Securities requested to be
included in the registration), if the Company after consultation with the
underwriter(s) recommends the inclusion of fewer Registrable Securities, or (y)
none of the Registrable Securities of the Holders shall be included in such
registration statement, if the Company after consultation with the
underwriter(s) recommends the inclusion of none of such Registrable Securities;
provided, however, that if securities are being offered for the account of other
persons or entities as well as the Company, such reduction shall not represent a
greater fraction of the number of Registrable Securities intended to be offered
by the Holders than the fraction of similar reductions imposed on such other
persons or entities (other than the Company).

                  (e) Failure to File Registration Statement and Other Events.
The Company and the Holders agree that the Holders will suffer damages if the
Registration Statement is not filed on or prior to the Filing Date and not
declared effective by the Commission on or prior to the Effectiveness Date and
maintained in the manner contemplated herein during the Effectiveness Period.
The Company and the Holders further agree that it would not be feasible to
ascertain the extent of such damages with precision. Accordingly, if (i) unless
the time period is tolled as provided for herein, the Registration Statement is
not filed on or prior to the Filing Date, or is not declared effective by the
Commission on or prior to the Effectiveness Date (or in the event an additional
Registration Statement is filed because the actual number of Common Shares and
Warrant Shares, exceeds the number of shares of Common Stock initially
registered is not filed and declared effective within the time periods set forth
in Section 2, (ii) the Company fails to file with the Commission a request for
acceleration in accordance with Rule 12dl-2 promulgated under the Exchange Act
within five (5) Business Days of the date that the Company is notified (orally
or in writing, whichever is earlier) by the Commission that a Registration
Statement will not be "reviewed," or not subject to further review, (iii) the
Company has breached Section 3(n) of this Agreement (any such failure or breach
being referred to as an "Event"), the Company shall pay as liquidated damages
and not as a penalty ("Liquidated Damages") to each Holder an amount equal to
one percent (1%) of the purchase price paid by such Holder for all shares of
Common Stock purchased and then outstanding pursuant to the Purchase Agreement
for the initial thirty (30) day period following the Event until the applicable
Event has been cured, which shall be pro rated for such period less than thirty
(30) days, and two


                                      -15-
<PAGE>   16

percent (2%) of the purchase price paid by such Holder for all shares of Common
Stock purchased and then outstanding for each additional thirty (30) day period
thereafter until the applicable Event has been cured, which shall be pro rated
for such periods less than 30 days (the "Periodic Amount"). Payments to be made
pursuant to this Section 7(e) shall be due and payable immediately upon demand
in immediately available cash funds or freely tradable shares of Common Stock,
at the option of such Holder. If a Holder elects to receive the Liquidated
Damages in shares of Common Stock, the value of such shares of Common Stock
shall be the lesser of $16.00 per share and the market price of the Common Stock
then in effect. The parties agree that the Periodic Amount represents a
reasonable estimate on the part of the parties, as of the date of this
Agreement, of the amount of damages that may be incurred by the Purchasers if
the Registration Statement is not filed on or prior to the Filing Date or has
not been declared effective by the Commission on or prior to the Effectiveness
Date and maintained in the manner contemplated herein during the Effectiveness
Period or if any other Event as described herein has occurred. Notwithstanding
anything to the contrary contained herein, the Company will not be liable for
Liquidated Damages after one (1) year from the Tranche II Closing Date.

                  (f) Specific Enforcement, Consent to Jurisdiction.

                           (i) The Company and the Holders acknowledge and agree
that irreparable damage would occur in the event that any of the provisions of
this Agreement or the Purchase Agreement were not performed in accordance with
their specific terms or were otherwise breached. It is accordingly agreed that
the parties shall be entitled to an injunction or injunctions to prevent or cure
breaches of the provisions of this Agreement or the Purchase Agreement and to
enforce specifically the terms and provisions hereof or thereof, this being in
addition to any other remedy to which any of them may be entitled by law or
equity.

                           (ii) Each of the Company and the Holders (i) hereby
irrevocably submits to the jurisdiction of the United States District Court
sitting in the Southern District of New York for the purposes of any suit,
action or proceeding arising out of or relating to this Agreement or the
Purchase Agreement and (ii) hereby waives, and agrees not to assert in any such
suit, action or proceeding, any claim that it is not personally subject to the
jurisdiction of such court, that the suit, action or proceeding is brought in an
inconvenient forum or that the venue of the suit, action or proceeding is
improper. Each of the Company and the Holders consents to process being served
in any such suit, action or proceeding by mailing a copy thereof to such party
at the address in effect for notices to it under this Agreement and agrees that
such service shall constitute good and sufficient service of process and notice
thereof. Nothing in this Section 7(f) shall affect or limit any right to serve
process in any other manner permitted by law.

                  (g) Amendments and Waivers. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the same shall be in writing and signed by the Company
and each of the Holders. Notwithstanding the foregoing, a waiver or consent to
depart from the provisions hereof with respect to a matter that relates
exclusively to the rights of Holders and that does not directly or indirectly
affect the rights of


                                      -16-
<PAGE>   17

other Holders may be given by Holders of at least a majority of the Registrable
Securities to which such waiver or consent relates; provided, however, that the
provisions of this sentence may not be amended, modified, or supplemented except
in accordance with the provisions of the immediately preceding sentence.

                  (h) Notices. Any and all notices or other communications or
deliveries required or permitted to be provided hereunder shall be in writing
and shall be deemed given and effective on the earlier of (i) the date of
transmission, if such notice or communication is delivered via facsimile at the
facsimile telephone number specified for notice prior to 5:00 p.m., pacific
time, on a Business Day, (ii) the Business Day after the date of transmission,
if such notice or communication is delivered via facsimile at the facsimile
telephone number specified for notice later than 5:00 p.m., pacific time, on any
date and earlier than 11:59 p.m., pacific time, on such date, (iii) the Business
Day following the date of mailing, if sent by nationally recognized overnight
courier service or (iv) actual receipt by the party to whom such notice is
required to be given. The addresses for such communications shall be with
respect to each Holder at its address set forth under its name on Schedule A
attached hereto, or with respect to the Company, addressed to:

                           CAM Data Systems, Inc.
                           17520 New Hope Street
                           Fountain Valley, CA  92708
                           Attn.:  Paul Caceres, Jr., Chief Financial Officer
                           Tel No.: (714) 241-9241
                           Fax No.: (714) 241-9893

or to such other address or addresses or facsimile number or numbers as any such
party may most recently have designated in writing to the other parties hereto
by such notice. Copies of notices to the Company shall be sent to Haddan &
Zepfel LLP, 4675 Mac Arthur Court, Suite 710, Newport Beach, California, Attn:
Jon R. Haddan, Esq., Facsimile No.: (949) 752-6161. Copies of notices to any
Holder shall be sent to the addresses listed on Schedule A attached hereto, if
applicable. Copies of notices to the Purchasers shall be sent to Parker Chapin
LLP, The Chrysler Building, 405 Lexington Avenue, New York, New York 10174,
Attention: Christopher S. Auguste, Esq., Facsimile No.: (212) 704-6288.

                  (i) Successors and Assigns. This Agreement shall be binding
upon and inure to the benefit of the parties and their successors and permitted
assigns and shall inure to the benefit of each Holder and its successors and
assigns. The Company may not assign this Agreement or any of its rights or
obligations hereunder without the prior written consent of each Holder. Each
Holder may assign its rights hereunder in the manner and to the Persons as
permitted under the Purchase Agreement.

                  (j) Assignment of Registration Rights. The rights of each
Holder hereunder, including the right to have the Company register for resale
Registrable Securities in accordance with the terms of this Agreement, shall be
automatically assignable by each Holder to any


                                      -17-
<PAGE>   18

transferee of such Holder of all or a portion of the shares of the Registrable
Securities if: (i) the Holder agrees in writing with the transferee or assignee
to assign such rights, and a copy of such agreement is furnished to the Company
within a reasonable time after such assignment, (ii) the Company is, within a
reasonable time after such transfer or assignment, furnished with written notice
of (a) the name and address of such transferee or assignee, and (b) the
securities with respect to which such registration rights are being transferred
or assigned, (iii) following such transfer or assignment the further disposition
of such securities by the transferee or assignees is restricted under the
Securities Act and applicable provincial and state securities laws, (iv) at or
before the time the Company receives the written notice contemplated by clause
(ii) of this Section 7(j), the transferee or assignee agrees in writing with the
Company to be bound by all of the provisions of this Agreement, and (v) such
transfer shall have been made in accordance with the applicable requirements of
the Purchase Agreement. In addition, each Holder shall have the right to assign
its rights hereunder to any other Person with the prior written consent of the
Company, which consent shall not be unreasonably withheld. The rights to
assignment shall apply to the Holders (and to subsequent) successors and
assigns.

                  (k) Counterparts. This Agreement may be executed in any number
of counterparts, each of which when so executed shall be deemed to be an
original and, all of which taken together shall constitute one and the same
Agreement. In the event that any signature is delivered by facsimile
transmission, such signature shall create a valid binding obligation of the
party executing (or on whose behalf such signature is executed) the same with
the same force and effect as if such facsimile signature were the original
thereof.

                  (l) Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York, without regard
to principles of conflicts of law thereof.

                  (m) Cumulative Remedies. The remedies provided herein are
cumulative and not exclusive of any remedies provided by law.

                  (n) Severability. If any term, provision, covenant or
restriction of this Agreement is held to be invalid, illegal, void or
unenforceable in any respect, the remainder of the terms, provisions, covenants
and restrictions set forth herein shall remain in full force and effect and
shall in no way be affected, impaired or invalidated, and the parties hereto
shall use their reasonable efforts to find and employ an alternative means to
achieve the same or substantially the same result as that contemplated by such
term, provision, covenant or restriction. It is hereby stipulated and declared
to be the intention of the parties that they would have executed the remaining
terms, provisions, covenants and restrictions without including any of such that
may be hereafter declared invalid, illegal, void or unenforceable.

                  (o) Headings. The headings herein are for convenience only, do
not constitute a part of this Agreement and shall not be deemed to limit or
affect any of the provisions hereof.


                                      -18-
<PAGE>   19

                  (p) Shares Held by the Company and its Affiliates. Whenever
the consent or approval of Holders of a specified percentage of Registrable
Securities is required hereunder, Registrable Securities held by the Company or
its Affiliates (other than any Holder or transferees or successors or assigns
thereof if such Holder is deemed to be an Affiliate solely by reason of its
holdings of such Registrable Securities) shall not be counted in determining
whether such consent or approval was given by the Holders of such required
percentage.

                  (q) Notice of Effectiveness. Within two (2) business days
after the Registration Statement which includes the Registrable Securities is
ordered effective by the Commission, the Company shall deliver, and shall cause
legal counsel for the Company to deliver, to the transfer agent for such
Registrable Securities (with copies to the Holders whose Registrable Securities
are included in such Registration Statement) confirmation that the Registration
Statement has been declared effective by the Commission in the form attached
hereto as Exhibit A.


                  [Remainder of Page Intentionally Left Blank]


                                      -19-
<PAGE>   20

         IN WITNESS WHEREOF, the parties hereto have caused this Registration
Rights Agreement to be duly executed by their respective authorized persons as
of the date first indicated above.


                                        CAM DATA SYSTEMS, INC.


                                        By: /s/ Paul Caceres, Jr.
                                            ------------------------------------
                                            Name:  Paul Caceres, Jr.
                                            Title: Chief Financial Officer



                                        MAGELLAN INTERNATIONAL, LTD.


                                        By: /s/ Anna Marie Lowe
                                            ------------------------------------
                                            Name:  Anna Marie Lowe
                                            Title: Director


                                        ASPEN INTERNATIONAL, LTD.


                                        By: /s/ Deirdre M. McCoy
                                            ------------------------------------
                                            Name:  Deirdre M. McCoy
                                            Title: Director


                                        ANEGADA FUND, LTD.


                                        By: /s/ Carlo Cannell
                                            ------------------------------------
                                            Name:  J. Carlo Cannell
                                            Title: Director


                                        TONGA PARTNERS, L.P.


                                        By: /s/ Carlo Cannell
                                            ------------------------------------
                                            Name:  J. Carlo Cannell
                                            Title: General Partner

<PAGE>   21

                                        GEORGE S. SARLO REVOCABLE TRUST
                                        12-23-91


                                        By:
                                            ------------------------------------
                                            Name: George Sarlo
                                            Title: Trustee


                                        ACQUA WELLINGTON SMALL CAP FUND, LTD.


                                        By: /s/ Anthony L.M. Inder Rieden
                                            ------------------------------------
                                            Name:  Anthony L.M. Inder Rieden
                                            Title:


                                        THE CUTTYHUNK FUND LIMITED


                                        By: /s/ Geoffrey M. Lewis
                                            ------------------------------------
                                            Name:  Geoffrey M. Lewis
                                            Title: Director


                                        BICOASTAL CONSULTING CORP.


                                        By: /s/ Peter T. Benz
                                            ------------------------------------
                                            Name:  Peter T. Benz
                                            Title: President


                                        AMRO INTERNATIONAL, S.A.


                                        By: /s/ Michael Klee
                                            ------------------------------------
                                            Name:  Michael Klee
                                            Title: Director

<PAGE>   22

                                                                      SCHEDULE A


                                   PURCHASERS
                                   ----------


Magellan International, Ltd.
Charlotte House
Charlotte Street
Nassau, Bahamas
Tel. no.: 242-323-8884
Fax no.: 242-323-7918
Attn:  Anthony L.M. Inder Rieden

Aspen International, Ltd.
Charlotte House
Charlotte Street
Nassau, Bahamas
Tel. no.: 242-323-8884
Fax no.: 242-323-7918
Attn: Anthony L.M. Inder Rieden

Anegada Fund, Ltd.
c/o Goldman Sachs (Cayman) Trust, Limited
Harbour Centre, 2nd Floor
George Town, Grand Cayman
Cayman Islands, B.W.I.
Tel. no.: 415-835-8300
Fax no.: 415-391-5245
Attn: J. Carlo Cannell, Director

Tonga Partners, L.P.
600 California Street, 14th Floor
San Francisco, CA 94108
Tel. no.: 415-835-8300
Fax no.: 415-391-5245
Attn: J. Carlo Cannell, General Partner

<PAGE>   23

                                                                      SCHEDULE A
                                                                     (CONTINUED)

                                   PURCHASERS
                                   ----------


Acqua Wellington Small Cap Fund Ltd.
c/o MeesPierson Fund Services
  (Bahamas) Limited
Montague Sterling Centre
P.O. Box SS-6238
Nassau, Bahamas
Tel. no.: 242-394-2700
Fax no.: 242-394-8348
Attn:  Anthony L.M. Inder Rieden

The Cuttyhunk Fund Limited
c/o Optima Fund Management
1285 Avenue of the Americas
New York, New York  10019
Tel. no.: 212-484-3040
Fax no.: 212-484-3001
Attn: Susan Kapusciski/Geoffrey M. Lewis

BiCoastal Consulting Corp.
543 Virginia Avenue
San Mateo, California 94402
Tel. no.: 650-340-1074
Fax no.: 650-343-2506
Attn:  Peter Benz

Amro International, S.A.
c/o Westminister Securities
100 Park Avenue
28th Floor
New York, New York 10017
Tel. no.: 212-376-8750
Fax no.: 212-214-0440
Attn:  Thomas Badian

<PAGE>   24

                                                                       EXHIBIT A

                         FORM OF NOTICE OF EFFECTIVENESS
                            OF REGISTRATION STATEMENT


[TRANSFER AGENT]
ATTN:______________________

                  RE:      CAM DATA SYSTEMS, INC.

Ladies and Gentlemen:

         We are counsel to CAM Data Systems, Inc., a company organized under the
laws of the State of Delaware (the "COMPANY"), and have represented the Company
in connection with that certain Units Purchase Agreement (the "PURCHASE
AGREEMENT") entered into by and among the Company and the buyers named therein
(collectively, the "HOLDERS") pursuant to which the Company issued to the
Holders units consisting of (i) shares (the "Common Shares") of its common
stock, par value $.001 per share (the "COMMON STOCK") and (ii) warrants to
purchase shares of Common Stock (the "WARRANTS"). Pursuant to the Purchase
Agreement, the Company has also entered into a Registration Rights Agreement
with the Holders (the "REGISTRATION RIGHTS AGREEMENT") pursuant to which the
Company agreed, among other things, to register the Registrable Securities (as
defined in the Registration Rights Agreement), including Common Shares and the
shares of Common Stock issuable upon exercise of the Warrants, under the
Securities Act of 1933, as amended (the "1933 ACT"). In connection with the
Company's obligations under the Registration Rights Agreement, on ____________
___, 2000, the Company filed a Registration Statement on Form [S-3] (File No.
333-_____________) (the "REGISTRATION STATEMENT") with the Securities and
Exchange Commission (the "SEC") relating to the Registrable Securities which
names each of the Holders as a selling stockholder thereunder.

         In connection with the foregoing, we advise you that a member of the
SEC's staff has advised us by telephone that the SEC has entered an order
declaring the Registration Statement effective under the 1933 Act at [ENTER TIME
OF EFFECTIVENESS] on [ENTER DATE OF EFFECTIVENESS] and we have no knowledge,
after telephonic inquiry of a member of the SEC's staff, that any stop order
suspending its effectiveness has been issued or that any proceedings for that
purpose are pending before, or threatened by, the SEC and the Registrable
Securities are available for resale under the 1933 Act pursuant to the
Registration Statement.

                                      Very truly yours,

                                      [COMPANY'S COUNSEL]

                                      By:
                                          --------------------------------------
cc: [LIST NAMES OF HOLDERS]