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                                                                   EXHIBIT 10.18

                       SUN MICROSYSTEMS COMPUTER COMPANY
                           JOINT MARKETING AGREEMENT

THIS JOINT MARKETING AGREEMENT ("Agreement") is entered into as of this 1st day
of August, 1998 (the "Effective Date") by and between Sun Microsystems Computer
Company, a division of Sun Microsystems, Inc., a Delaware corporation, with a
principal place of business at 901 San Antonio Road, Palo Alto, California
94303 ("Sun") and Chip Application Technologies, Ltd., an Australian
corporation, with a principal place of business at Level 5 Cabcharge House,
152-162 Riley Street, East Sydney, NSW, Australia ("Company").

RECITALS

Sun is engaged in the development, manufacture, sale and distribution of
certain computer hardware and related software (collectively, the "Sun
Platform").

Company is the owner and developer of the 'The C.A.T. System' software program
and documentation, and has ported the Products for use with the Sun Platform
(the "Products"). Sun and Company desire to market and promote the Products for
use with the Sun Planform on the terms and conditions hereinafter set forth.

NOW, THEREFORE, the parties agree as follows:

1. DEFINITIONS

1.1 "Company Trademarks" shall mean all names, marks, logos, designs, trade
dress and other brand designations used by Company in connection with the
Products.

1.2 "Customer" shall mean the end-user of the Products with the Sun Platform.

1.3 "Intellectual Property Rights" shall mean all patents, patent applications,
and copyrights; rights relating to the protection of trade secrets and
confidential information; and other proprietary rights including, without
limitation, license rights relating to intangible property; and divisions,
continuations, renewals, reissues and extensions of the foregoing now existing,
or hereafter filed, issued or acquired.

1.4 "Sun Trademarks" shall mean all names, marks, logos, designs, trade dress
and other brand designations used by Sun in connection with the Sun Platform.

2 PRODUCT MARKETING AND SUPPORT

2.1 Product Marketing

(a) Availability of Products. Company will make the Products available on its
standard terms and conditions for Customer's use with the Sun Platform.

(b) Sun's Product Marketing Rights. Company grants to Sun the right to market
the Products to Customers for use with the Sun Platform. Sun's marketing and
promotion of the Products may be carried out on a worldwide basis, and may
include the matters more particularly detailed in a marketing plan to be agreed
upon between the parties.

(c) Marketing Review. Sun and Company shall meet quarterly at such location as
the parties may mutually agree in order to review the promotion of the
Products. The purpose of the review ("marketing review") shall be to assess and
develop joint marketing strategies. At each marketing review meeting the
parties shall: (i) assess marketing plans, Customer prospects, existing
Customers and progress on any joint sales proposals; and (ii) provide and
discuss product marketing information that may be available.

Any items mutually agreed upon by the parties following the most recent
marketing review are set forth in Attachment A. Attachment A may be amended
from time to time with the consent of both parties.
<PAGE>   2

(d) Publicity. The terms and conditions of this Agreement are confidential.
Any disclosures by either party about the existence of this Agreement, its
terms and conditions, and the activities contemplated herein are subject to the
disclosing party obtaining the prior written approval of the other party.

2.2 Product Support

(a) Company Product Support. Company will be responsible for providing customer
support, including telephone support and warranty service to Customers with
respect to the Products, through Company's authorized sales channels, and may
charge Customers for such support in accordance with Company's standard
practices.

(b) Sun Engineering Support. Sun shall provide Company with limited engineering
support from time to time to assist Company in optimizing performance of the
Products with the Sun Platform. Sun engineering support shall consist of
trouble-shooting assistance and telephone and email support to Company, and
shall be subject to the availability of the appropriate Sun personnel. The
amount and scope of such support shall be determined in Sun's sole discretion.

(c) Enhancements or Modifications. From time to time Sun will inform Company of
any perceived enhancements or modifications that are likely to be generally
required for the Products. The parties shall co-operate with one another to
clarify details of any modifications or enhancements that may be so recommended.

(d) New Releases. The parties will provide pre-release versions of their
products to one another from time to time and will advise each other as soon as
practicable of plans for future releases of their respective products. Any
pre-release disclosures by Sun to Company shall be subject to the terms and
conditions of Sun's standard pre-release license agreement, which Company shall
execute before any such disclosure.

(e) Product Training. Each party will provide the other party free of charge
with initial training courses on the respective products at dates and locations
and for such reasonable number of the other party's personnel as may be
mutually agreed.

3. COMPANY OBLIGATIONS

3.1 Sun Catalyst Program. Company shall apply to become a member of the Sun
Catalyst Program. As a Catalyst member, Company will be able to purchase a
designated number of Sun development systems at a significant discount, in
accordance with the program's terms and conditions.

3.2 Reference Account. Company agrees to be a reference account for Sun and
permits Sun to use its name, customers and products in press releases,
advertising, and other marketing and promotional materials in formats and with
content that Sun deems appropriate.

3.3  Sun Connect and Sun Card Support. Company agrees to publicly support the
Sun Connect and Sun Card architectures in its marketing activities and work
with Sun to enhance its Products to be compatible with these architectures.

4. SUPPORT OF TENDERS

4.1 Company Support. Upon request from Sun, Company shall support Sun in the
promotion of the Products to mutually agreed prospective Customers. The extent
of such support shall be agreed at the marketing reviews, or as may otherwise
mutually agreed from time to time. Support is expected to consist of technical
support to Sun's personnel in responding to tenders and/or defining
configuration details on the basis of prospective Customer requirements. In the
context of any on-site presentations or demonstrations, if mutually agreed to,
each party shall be responsible for the provision of such demonstration
equipment and facilities as the parties may agree.
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4.2   Conflicts of Interest. In the event that either party has conflicting
commercial interests in relation to a prospective Customer (where Company may
also be working in conjunction with a supplier of competitive hardware or Sun
may also be working in conjunction with a supplier of competitive software),
the party with the conflict shall notify the other party immediately regarding
such conflict.

4.3   Bidding Support. Company shall bid exclusively with Sun to any Customers
or prospects to whom Company has been introduced by Sun, except (i) with Sun's
prior written consent, (ii) where Company or prospect has conflicting
contractual obligations, or (iii) the Customer or prospect specifies a
different computer hardware platform.

5.    SALES TARGETS

5.1   Targets for Fiscal Years 1999-2000. Sun and Company have mutually
developed sales targets for Sun's Fiscal Years 1999 - 2000 (July 1, 1998 - June
30, 2000). These targets are described in Attachment B to this agreement.

6.    MARKETING CONTACTS

6.1   Sun Marketing Contacts. Attachment C lists the current individuals (which
are subject to change) at Sun who are responsible for driving business with
Company in each identified geographic region. An updated list of contact names
will be available to Company at the financial services partner website at
http://www.sun.com/finance.

6.2   Company Marketing Contacts. Attachment C lists the current individuals
(which is subject to change) at Company who will be responsible for driving
business with Sun in each identified geographic region. Company will make
available an updated list of contact names to Sun on a regular basis.

7.    INTELLECTUAL PROPERTY RIGHTS

7.1   Ownership. Each party acknowledges that it shall not acquire any
Intellectual Property Rights under this Agreement in the products or associated
materials of the other, and all rights therein are strictly reserved. Any
goodwill arising in the course of this Agreement in respect of the products of
either party shall accrue solely for the benefit of that party.

7.2   Use of Sun Trademarks. Company is granted no right, title or license to,
or interest in, any Sun Trademarks. Company acknowledges Sun's rights in Sun
Trademarks and agrees that any use of Sun Trademarks by Company shall inure to
the sole benefit of Sun. Company agrees not to (a) challenge Sun's ownership or
use of, (b) register, or (c) infringe any Sun Trademarks, nor shall Company
incorporate any Sun Trademarks into Company's trademarks, service marks,
company names, Internet addresses, domain names, or any other similar
designations. If Company acquires any rights in any Sun trademarks by operation
of law or otherwise, it will immediately at no expense to Sun assign such
rights to Sun along with any associated goodwill, applications, and/or
registrations.

7.3   Sun Trademark and Logo Policies. Company may refer to Sun products by
their associated Sun Trademarks, provided that such reference is truthful and
not misleading and complies with the then current version of the Third Party
Use of Sun Trademarks policy under Sun Trademark and Logo Policies. Company
shall not remove, alter, or add to any Sun Trademarks, nor shall it co-logo Sun
products. Specifically, Company shall not use the names "Sun," "Salaris,"
"Jave," or any other Sun Trademark in the name of the Products, e.g. the
Products may not be named "SunXYZ" or JavaXYZ" or "XYZ for Solaris."

8.    WARRANTIES AND INDEMNIFICATION

8.1   Non-Infringement Warranty. Company represents and warrants that Company
is the owner of the Products and that the Products do not infringe any
Intellectual Property Rights of any third party.

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8.2  Warranty Disclaimer, UNLESS SPECIFIED IN THIS AGREEMENT, ALL EXPRESS OR
IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS
ARE HELD TO BE LEGALLY INVALID.

8.3  Indemnification. Company will defend Sun from all claims by third parties
relating to its Product, and shall indemnify and hold Sun harmless from all
associated damage, loss, costs and expenses, including attorney's fees,
provided that Sun: (a) provides notice of the claim promptly to Company; (b)
gives Company sole control of the defense and settlement of the claim; (c)
provides Company, at Company's expense, all available information, assistance
and authority to defend; and (d) has not compromised or settled such proceeding
without Company's prior written consent.

9.   LIMITATION OF LIABILITY

Except for obligations under Article 8 and to the extent not prohibited by
applicable law;

(a)  Each party's aggregate liability to the other for claims relating to this
Agreement, whether for breach or in tort shall be limited to Ten Thousand
Dollars ($10,000).

(b)  NEITHER PARTY WILL BE ELIGIBLE FOR ANY INDIRECT, PUNITIVE, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGE IN CONNECTION WITH OR ARISING OUT OF THIS
AGREEMENT (INCLUDING LOSS OF BUSINESS, REVENUE, PROFITS, USE, DATA OR OTHER
ECONOMIC ADVANTAGE), HOWEVER IT ARISES, WHETHER FOR BREACH OR IN TORT, EVEN IF
THAT PARTY HAS BEEN PREVIOUSLY ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

(c)  Liability for damages shall be limited and excluded, even if any exclusive
remedy provided for in this Agreement fails of its essential purpose.

10.  CONFIDENTIAL INFORMATION

If one party desires that information provided to the other under this Agreement
be held in confidence, the disclosing party will identify the information as
confidential or proprietary. The receiving party may not disclose the other
party's confidential or proprietary information and may use it only for
purposes specifically contemplated in this Agreement. The receiving party
will treat tangible business and financial information of the disclosing party
that has been previously identified as confidential, with the same degree of
care as it does its own similar information. The foregoing obligations do not
apply to information which: (a) was in the possession of, or was known by, the
receiving party prior to its receipt from the disclosing party; (b) is or
becomes generally known to the public without violation of this Agreement; (c)
is obtained by the receiving party from a third party, without an obligation to
keep such information confidential; or (d) is independently developed by the
receiving party without use of the confidential or proprietary information.
This section will not affect any other confidential disclosure agreement between
the parties.

11.  TERM AND TERMINATION

11.1 Term and Termination.

(a) This Agreement will come into force on the Effective Date and will remain
in effect for two (2) years unless earlier terminated in accordance with
Section 9.1(b).

(b) Either party may terminate this Agreement: (i) without cause and for any
reason, on sixty (60) days' Notice to the other party; or (ii) immediately upon
giving Notice of any material breach by the other party if the nature of the
breach is such that it cannot be remedied; or (iii) thirty (30) days following
Notice to the other party of a material remedial breach, if the other party has
not remedied such breach within that thirty-day period.

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11.2 No Liability for Termination. The right of termination provided herein is
absolute and the party terminating shall not be liable to the other for damages
of any kind, including incidental or consequential damages, damages for loss of
prospective business or loss of continuing business, or otherwise which arise
due to a termination in accordance with the provisions of this Section. This
does not relieve either party from responsibility for damages caused by its
actions or breaches of the Agreement, but only for damages related to or
resulting from the termination of the business relationship.

11.3 Continuing Obligations. The parties agree to continue and complete any
marketing activities hereunder involving commitments by either party to any
Customer or other third party incurred prior to the date of expiration or
termination and in process on such date.

11.4 Return of Materials. Upon expiration or termination of this Agreement,
each party shall return all marketing and other materials received from the
other party, except for non-confidential sales literature or demonstration
software specifically designed for public distribution.

12. NOTICES

All Notices required by this Agreement must be in writing, delivered in person
or by means evidenced by a delivery receipt and will be effective upon receipt
by the persons specified below:

Sun Company
Sun Microsystems Computer Company            Chip Application Technologies
a division of Sun Microsystems, Inc.         Level 5, 152-162 Riley Street
901 San Antonio Road, M/S UMPK10-201         East Sydney, NSW 2010
Palo Alto, CA 94303                          Australia
Attn.: General Counsel                       Attn.: Company Secretary

13. GENERAL

13.1 Relationship of the Parties. This Agreement is not intended to create a
relationship such as a partnership, franchise, joint venture, agency, or
employment relationship. Neither party may act in a manner which expresses or
implies a relationship other than that of independent contractor, nor bind the
other party.

13.2 Assignment. Neither party may assign or otherwise transfer any of its
rights or obligations under this Agreement, without the prior written consent
of the other party, except that Sun may assign this Agreement to an affiliated
company.

13.3 Survival. Rights and obligations under this Agreement which by their
nature should survive will remain in effect after termination or expiration
hereof.

13.4 Force Majeure. A party is not liable under this Agreement for
non-performance caused by event or conditions beyond that party's control if
the party makes reasonable efforts to perform.

13.5 Waiver. Any express waiver or failure to exercise promptly any right under
this Agreement will not create a continuing waiver or any expectation of
non-enforcement.

13.6 Partial Invalidity. If any term or provision of this Agreement is found to
be invalid under any applicable statute or rule of law then, that provision
notwithstanding, this Agreement shall remain in full force and effect and such
provision shall be deleted.

13.7 Governing Law. Any action related to this Agreement will be governed by
California law and controlling U.S. federal law. No choice of law rules of any
jurisdiction will apply.
<PAGE>   6
13.8 Entire Agreement. This Agreement is the parties' entire agreement relating
to its subject matter. It supersedes all prior or contemporaneous oral or
written communications, proposals, conditions, representations and warranties
and prevails over any conflicting or additional terms of any quote, order,
acknowledgment, or other communication between the parties relating to its
subject matter during the term of this Agreement. No modification to this
Agreement will be binding unless in writing and signed by an authorized
representative of each party. IN WITNESS WHEREOF, the parties hereto have
caused this Agreement to be executed by their respective authorized
representatives as of the Effective Date.

SUN MICROSYSTEMS COMPUTER COMPANY            COMPANY
a division of Sun Microsystems, Inc.

    /s/ ROBERT HALL                              /s/ JUSTIN C.A. WESCOMBE
By: ____________________________________     By: _______________________________

      Robert Hall                                  Justin C.A. Wescombe
Name: __________________________________     Name: _____________________________

       Vice President                               SVP, Sales and Marketing
Title: _________________________________     Title: ____________________________

      10/23/98                                     6 October 1998
Date: __________________________________     Date: _____________________________<PAGE>   1
                                                                   EXHIBIT 10.19

                   [CHIP APPLICATION TECHNOLOGIES LETTERHEAD]

                         CO-OPERATIVE AGREEMENT BETWEEN
                     CHIP APPLICATION TECHNOLOGIES (C.A.T.)
                                      AND
                        GLOBAL TRANSACTION COMPANY (GTC)
                     TO CREATE AND OPERATE A BUREAU SERVICE

This co-operative agreement between Chip Application Technologies (C.A.T.) and
Global Transaction Company (GTC) creates a non-exclusive bureau service to
process transactions, and service customers, within the framework of the C.A.T.
system alongside any relevant GTC systems. For the immediate term of the
co-operative agreement, customers will be limited to the existing GTC partners
and beta partners for the C.A.T. Internet module.

1.   PERIOD OF AGREEMENT AND TERMINATION.

The co-operative agreement will remain in force until cancelled by both parties
or superseded by another agreement. Either party can initiate cancellation by
making a written notification of cancellation to the other party. Cancellation
comes into effect 180 days after the other party receives the notification.

2.   LOCATION OF BUREAU SERVICE.

The bureau service operated under this co-operative agreement will be located
at the GTC offices in Columbus, Ohio.

3.   RESPONSIBILITIES OF CHIP APPLICATION TECHNOLOGIES

C.A.T. will provide all relevant C.A.T. system software to the bureau service
created under this co-operative agreement free of charge. C.A.T. will not make
any charges to the bureau service for the first year of operation. After this
time, a charge structure will be determined by mutual agreement.

C.A.T. will provide the services of up to 2 people for a period of not less than
9 months in any 12-month period. While these services may include one full time
executive, it may include the part time services of 3-4 executives over the
period.

4.   RESPONSIBILITIES OF GLOBAL TRANSACTION COMPANY.

GTC will provide office space and all general fully serviced office facilities
for up to 2 C.A.T. personnel at no cost in the first year. Thereafter normal
commercial rates for such services will apply and the structure of these rates
will be determined by mutual agreement.

GTC will provide and install all of the equipment and third party software
required to operate the C.A.T. system at GTC cost. This cost will be depreciated
and amortised over an agreed period (3-5 years). In the first year no charges
for such equipment and software will be charged to the bureau service. After the
first year of operation, an amount equivalent to such depreciation and
amortisation will be paid to GTC in each year by the bureau service under terms
to be mutually agreed.

<PAGE>   2
12. FAILURE TO AGREE.

If GTC and C.A.T. fail to reach an agreement, after negotiating in good faith,
on the creation and on-going management of the service bureau anticipated by
this agreement by the end of the beta period (31 March 2000). GTC has the right
to purchase the latest license version of 'The C.A.T. System' (supporting their
existing card and terminals models) on the following terms:

o    GTC will pay C.A.T. a license fee for the right to use the C.A.T. System
     according to the following pricing schedule:

<TABLE>

<S>                                                                <C>
     ___________________________________________________________________________

                      Terms of License                               Price
     ___________________________________________________________________________

      1.0  Annual license fee for up to 10,000 active cards             $10,000
     ___________________________________________________________________________

      1.1  No card fee
     ___________________________________________________________________________

      2.0  Unrestricted license for up to 100,000 active cards         $100,000
     ___________________________________________________________________________

      2.1  Active Card Fee per year                              $0.33 per card
           (No fee for first twenty four months of agreement)
     ___________________________________________________________________________

      3.0  Unrestricted license

     ___________________________________________________________________________

      3.1  Active Card Fee per year
           (No fee for first forty eight months of agreement)
           Up to 200,000 cards                                   $0.25 per card
           200,000 - 500,000 cards                               $0.10 per card
           Above 500,000 cards                                   $0.05 per card

    ___________________________________________________________________________
</TABLE>

     The License shall be for an initial period of ten years with automatic
     one-year renewal after this period. License may be terminated for
     non-payment of fees, insolvency or other standard termination terms.
     An Active card is a card that has been activated with a transaction
     completed in the period.

     o     C.A.T., or their business partner, will provided support,
           maintenance and services to GTC for the entire period that GTC
           operates the C.A.T. System. The rates for support, maintenance and
           services will be at the then prevailing rates but will be no greater
           than any other C.A.T. customer in North America.

           This agreed licensing fee, transaction fee and support, service
           and maintenance model will remain in effect for the term of this
           Cooperative Agreement plus 60 days. The terms of section 12 may be
           amended at any time up to the 31 March 2000 with the consent of both
           parties.

Agreed by                                    Agreed by

CHIP APPLICATION TECHNOLOGIES                GLOBAL TRANSACTION COMPANY

Name: Justin C.A. Wescombe                   Name: [Illegible]

Title: SVP, Sales and Marketing              Title: VP, Chief Technology Officer

Date: 28 July 1999                           Date: 2 August 1999
<PAGE>   3
5. OWN COSTS.

Each party will be responsible for their personnel costs in the first year.
Thereafter these costs will be paid by the bureau service based on a model to
be agreed at a later date.

6. BUDGET.

A budget will be prepared and agreed for the first year by both parties. At the
time of agreement of the budget, both parties will approve the basis on which
any expenses will be paid and how costs will be shared between the parties. All
costs that are not included in the budget and exceed $2500 will require the
prior approval of the other party prior to being incurred.

7. MARKETING OF BUREAU SERVICE.

GTC and C.A.T. will work together to market the bureau services. On-going
marketing support for clients relevant to C.A.T. programs will be provided
by C.A.T. on a case by case basis.

8. CONFIDENTIALITY.

All dealings of the parties will be covered by a confidentiality agreement. Any
Third Party information will be protected, analyzed, and disseminated based on
a mutually agreed policy.

9. INTELLECTUAL PROPERTY.

All Intellectual Property owned or developed by a party will remain the
property of that party. Unless otherwise agreed, any Intellectual Property
developed during the period covered by the co-operative agreement will be owned
jointly by the parties and each party will have a non-exclusive royalty free
license to use such Intellectual Property. All confidential information created
by the bureau service will be owned jointly by the parties and each party will
have a non-exclusive royalty free license to use such confidential information.

10. PRODUCT DEVELOPMENT AND ENHANCEMENT.

All development required for the operation of the bureau service under the
terms of the co-operative agreement will be agreed by both parties and the
terms for each development agreed on a case by case basis.

C.A.T. will maintain the instance of its software product at the bureau service
by installing upgrades and maintenance patches as they are released.

11. WARRANTIES.

C.A.T. provides no guarantees or warranties as to the performance or
suitability for purpose of the C.A.T. system to any customers requirements
other than as specified in a third party customer contract that has received
C.A.T.'s prior written approval.

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