Exhibit 4(a)5

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Amendment 157
to the
Amended and Restated License Agreement
for the Use and Marketing of Programming Materials
dated May 31, 1996 as amended (the "1996 Agreement")
between
International Business Machines Corporation
and
Dassault Systemes

This
Amendment ("Amendment") is entered into by and between International Business Machines Corporation ("IBM"), incorporated under the laws of the State of New York and Dassault Systemes,
("DS"), a French société anonyme, each a "party" and collectively the "parties".

Whereas,
DS is the developer and owner of 3D/2D Computer Aided Design/Computer Aided Manufacturing/Computer Aided Engineering/Product Development Management, Digital Manufacturing,
Digital Mock Up and PLM infrastructure software programs marketed under various trademarks, and which constitute the PLM solution

Whereas,
IBM will market and sell Licensed Programs to Named Accounts, as defined below.

Whereas,
the DELMIA, and ENOVIA MatrixOne products will be licensed to IBM for sale as Licensed Programs.

Whereas,
the parties wish to amend the 1996 Agreement for the purposes of making the changes associated with the foregoing.

Now
therefore, the parties agree as follows:

1.0   DEFINITIONS

Delegated Accountshall mean the coverage of a Named Account, as defined below, by an IBM PLM business partner on behalf of IBM for the corresponding
Brand.

DS Transition Customershall mean those current customers of DS that appear on the Named Account List and have a DS license for one or more DS Product
Brands for which the customer is a Named Account. The transition is limited to such Brands.

IBM coveredshall mean the coverage of a Named Account directly by IBM for the corresponding Brand.

IBM Plan Ratesshall mean the currency exchange rates used by IBM to measure and report revenue and profit at constant currency.

IBM Transition Customershall mean those current customers of IBM PLM products that do not appear on the Named Account List.

International Customershall mean an entity that has locations/Subsidiaries in multiple countries.

Inventoryshall mean for each of the parties, any customer installed base (per products, license and seats).

Inventory Informationshall mean the relevant information relating to the Inventory pertaining to a transition customer, provided by the party
transitioning such customer to the other party. The Inventory Information shall contain that which is agreed on in accordance with Section 4.1.1, but at a minimum include the information
contained in the inventory records, which is installed base (products and quantity), billing and shipping address, account name and an indicator whether ALC/RLC is active and billing. Inventory
Information also includes software license key information.

Jointly coveredshall mean the coverage of a Named Account for the corresponding Brand i) by DS for the PLM application software sale and
ii) by IBM for the executive selling and contract closure.

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Named Accountshall mean the end user customers and prospects identified in the Named Account Lists attached as Exhibits 1 to 3 to this
Amendment to which IBM is entitled to distribute the current and New DS Products Brands pursuant hereto.

Named Account Listshall mean the list containing the Category 1 Named Accounts and the Category 2 Named Accounts, as described in
Section 3.1 and as such list may be modified from time to time as provided for in this Amendment. There is one Named Account List for CATIA, ENOVIA VPLM and ENOVIA SmarTeam, and one
Named Account List for each of the New DS Product Brands.

New DS Product Brandshall mean DELMIA and ENOVIA Matrix One.

2.0   OVERVIEW

Following
is a summary of the key elements agreed on by the parties. Related terms and conditions are set forth in subsequent sections of this Amendment.

2.1
IBM will sell the Licensed Programs to Named Accounts as provided herein.

2.2
DS will license to IBM the DELMIA and ENOVIA MatrixOne product portfolios to market and sell as Licensed Programs in the Named Accounts listed in the corresponding Exhibit, under the terms and
conditions of the 1996 Agreement, unless otherwise provided in this Amendment. The parties will initiate discussions in the course of the first quarter 2007 in order to agree on the terms and
conditions for the licensing of SIMULIA to IBM by DS for distribution.

2.3
IBM Transition Customers will be transitioned to DS and DS Transition Customers will be transitioned to IBM as described herein.

2.4
A channel management agreement may be implemented in each country for a minimum period of 6 months prior to the agreed date for the start of the transition of IBM Transition Customers to DS
in the corresponding country (as set forth in Exhibit 4 hereto). Any such agreement will be formalized in a Participation Agreement under the Channel Management Service Provider ("CMSP")
Agreement currently in place between the parties. The agreed schedule for the CMSP deployment is attached as Exhibit 5 hereto.

2.5
Each party will cooperate with the other to facilitate an orderly customer and channel transition and minimize any conflicts or impacts. In support of this commitment, each party will appoint
transition focal points by geography, country, and/or functional area, as the parties mutually agree.

2.6
A communications plan shall be jointly developed and executed to help explain these actions to customers, the channel, analysts and media.

2.7
Each year, DS will offer a royalty incentive to IBM to grow IBM PLM revenue in the Named Accounts. DS will offer a royalty incentive to IBM on IBM PLM SMB revenue for each year of the expected
transition period set forth in Section 10.6.

2.8
A governance process will be implemented to review transition performance and address issues, as provided in Section 11.

3.0   ACCOUNT COVERAGE

3.1
The Named Account Lists contain:



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3.2
Changes in the Named Account Lists

3.2.1
Quarterly through the Named Accounts Council set forth in Section 11.1, the Named Account Lists will be jointly reviewed and additions/deletions will be made, as appropriate, by agreement
between DS and IBM.

Criteria
to be considered for the addition of an account to the Category 1 Named Account list include, but are not limited to:



It
is understood that DS will make the final determination regarding the deletion of a Category 2 Named Accounts when such account has not produced PLC revenue in the preceding
12 months.

The
Named Account Lists may also be modified in accordance with the provisions of Section 11.4.

3.2.2
Category 2 Named Accounts having produced new license revenue with a dedicated sales coverage by IBM and a[***]forecast for the coming year will become Category 1 Named Accounts, subject to an agreed upon transition plan if a business partner is involved in the corresponding account. Accounts that do
not achieve the foregoing will be reviewed as part of the Fall Plan process. Named Accounts can be added to Category 2 upon joint IBM/DS agreement through the governance process described in
Section 11.1.

3.3
Subject always to Section 3.2, or unless it is agreed to be removed via the governance process described in Section 11.0, when an account is designated as a Category 1 Named
Account, it will remain so designated for a period of five (5) years from the date of this Amendment, subsequent to which it will be candidate to be renewed for successive three
(3) year periods.

Subject
always to Section 3.2, when an account is designated as Category 2 Named Account, it will remain so designated until December 31st of the year
following the year in which the account was designated as Category 2 Named Account ("Initial Period"). Following the Initial Period, a Category 2 Named Account will either be
(i) moved to Category 1 pursuant to the criteria in Section 3.2.2, (ii) renewed for one (1) year, or (iii) removed as a Category 2 Named Account via
the governance process in accordance with criteria to be agreed upon by the parties.

3.4
International Customers

3.4.1.
Centralized Procurement International Customers

Centralized
Procurement International Customers are customers with remote locations/Subsidiaries in several geographies that request a global agreement at their headquarters location which sets
prices, terms and conditions, for their remote locations/Subsidiaries, and:



With
each Centralized Procurement International Customer, IBM and DS each agree to first encourage local purchasing by explaining the benefits of local purchasing over centralized purchasing. However,
if after such encouragement, the International Customer still requests to centrally purchasing licenses, the sale shall proceed unless the parties mutually agree otherwise.

Centralized
Procurement International Customers also include all customers who have executed central procurement contracts with IBM or DS prior to the date of this Amendment.

3.4.1.1.
IBM will have responsibility for Centralized Procurement International Customer contracts when the headquarters location for the Centralized Procurement International Customer is a Named
Account. DS will have responsibility for Centralized Procurement International Customer contracts when the headquarters location for the Centralized Procurement International Customer is a
non-Named Account. The party

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responsible
for the contract will provide compensation to the other party (DS or IBM) responsible for the locations/Subsidiary, as described below.

3.4.1.2
Each new request to become a Centralized Procurement International Customer, will be reviewed by IBM and DS. An International Operating Council ("IOC") comprised of Geo/IOT representatives of
IBM and DS will meet on a bi-weekly basis during the first two months of the quarter, and weekly during the last month of the quarter. The IOC will verify that the IBM or DS teams have
presented the benefits of local purchasing over centralized purchasing to the procuring location, and will review the International Customers' response. Where the benefits of doing business locally
have been explained but the International Customer still wants centralized purchasing, the IOC will do the following, unless mutually agreed otherwise:



The
party that will hold the central procurement contract (and therefore receive the revenue) will make any agreed upon payment(s) to the other party, who will be responsible for compensation
due to their business partner. Payment of any compensation to a business partner shall be documented in a project form to be signed by the party holding the BP contract (IBM or DS, as
appropriate), and the business partner, stating that such payment compensates the business partner for the corresponding loss of revenue and for the business partners' efforts to support the customer
and generate new business.

For
the purpose of this clause, "PLM PLC Product Revenue" shall mean the PLC revenue, for the corresponding country, computed as a ratio of the total PLC revenue on the
International Customer account multiplied by the number of licenses in use in that country divided by the total number of licenses available to such customer. PLM PLC Product Revenue shall be
net of any refunds, credits and sales tax.

Each
such International Customer will be required, upon the conclusion of each central procurement transaction, to declare the location where it uses and intends to use the licenses. For existing
central procurement transactions closed since October 1, 2005, this information will be provided shortly after the date of this Amendment, provided that the existing customer contract terms
require the customer to provide such information (or absent such terms, if the customer provides upon request).

3.4.1.3
The IOC shall also ensure that, when an International Customer desires to locally purchase and pay for licenses under a central procurement agreement, if such customer is an IBM Named Account
in the country where the headquarters is located, DS will serve as an IBM agent in countries where such customer is not an IBM Named Account. Where DS performs the sales process as well as the local
product distribution, key issuance and Level 1 support, DS will be paid a fee representing[***]of the PLC and
RLC revenue it so generates, in consideration for such activities. The parties may mutually agree to another level of compensation when DS performs fewer activities for an International Customer. The
parties further agree to exclude from the PLC/RLC revenue used in calculating the fee due DS, the PLC/ALC revenue from Jointly Covered DS Product Brands.

If
such customer is a DS account in the country where the headquarters is located, IBM will serve as a DS agent in countries where such customer is not a DS account. Where IBM performs the sales
process as well as the local product distribution, key issuance and Level 1support, IBM will be paid a fee representing [***]of the PLC and RLC revenue it so generates, in consideration for
such activities. The parties may mutually agree to
another level of compensation when IBM performs fewer activities for an International Customer.

3.4.1.4
The customer situation will be routed to the IBM PLM Worldwide Sales General Manager, PLM Finance Leader, DS Executive Vice President and Chief Financial Officer, and the DS Executive Vice
President, Channel Sales and the DS Executive Vice President Business Transformation and Services, for determination if another approach should be taken, and for approval of the business partner
compensation.

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3.4.2
International Customer License Transfers

When
an International Customer requests to transfer a license(s) between locations/Subsidiaries which are a mix of Named Account and a non-Named Account, the parties agree to
the following:



4.0   ACCOUNT TRANSITION

4.1
Information Exchange

4.1.1
IBM and DS shall jointly agree, within thirty (30) days after execution of this Amendment, on the information that constitutes Inventory Information. One guiding principle in the
determination of Inventory Information is that neither party will be required to collect and provide information that the party does not currently track or record. In addition to the Inventory
Information identified in Section 1.0 Definitions, Inventory Information may include information such as form of customer agreement (e.g., ICA or custom contract), and name of business
partner associated with the customer.

4.1.2
Neither party will have any obligation to provide information to the other party in violation of any privacy regulation or in breach of a customer confidentiality agreement. In the event
information to be exchanged by the parties pursuant to this Amendment is restricted by privacy regulations or customer confidentiality, the parties will work together to address any such circumstances
and request customer consent to disclose the confidential information to the other party.

4.2
IBM Transition Customers

4.2.1
IBM Transition Customers will be transitioned to DS. IBM Transition Customers in each country, including academic and CATIA Student program customers, will be transitioned beginning on or after
the date set forth for that country in Exhibit 4.

4.2.2
The IBM Customer Transition Date shall be deemed to have occurred when: (a) for the IBM Inventory, the IBM Transition Customer has terminated the IBM license agreements, and entered into
new license agreements with DS (or any of its affiliates), and (b) DS has notified IBM as set forth in Section 4.2.7.

DS
is responsible for transitioning IBM customers to DS and for obtaining written termination of the IBM licenses by the IBM Transition Customer, using a termination form agreed upon between IBM and
DS within thirty (30) days from the date of this Amendment. The parties agree that the customer will not be required to return or destroy any IBM PLM programs or documentation provided by IBM.
Within thirty (30) days after the IBM Customer Transition Date, IBM will process the recurring charge refund due to the customer, if any. It is expressly agreed that IBM Transition Customers
will be entitled to continue to use the software key provided by IBM for the use of the corresponding software under a DS license agreement. Replacement keys needed by IBM Transition Customers
following transition will be provided by DS.

4.2.3
The terms of any unique (custom) contracts with customers that are a non-Named Account will be reviewed on a case-by-case basis by IBM and DS. IBM will remain
responsible for all such agreements and customers while a determination is jointly made on the disposition of the contract and a transition plan is set up by IBM and DS. For those contracts which IBM
will continue to fulfill, if an IBM PLM business partner is involved, IBM will compensate the IBM PLM business partner and DS (in its capacity as channel manager) in accordance with the fee
model in force prior to the date of this Amendment for SMB customers.

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4.2.4
All terms and discount commitments, including IVO's, made to a customer by IBM, where DS has agreed to the terms and discounting via special bid, will be (i) applied by DS directly to a
transitioned customer until the expiration of such commitment and (ii) honored by DS when IBM retains responsibility for the customer.

4.2.5
IBM will provide Inventory Information to enable DS to identify and track the IBM Transition Customer's installed base of DS PLM products. IBM will provide the Inventory Information not later
than forty-five (45) days before the corresponding Country Transition Date, except for those countries transitioning January 1, 2007. For these countries, and except as set
forth below, IBM will provide Inventory Information through the third quarter 2006 within twenty (20) days after execution of the Amendment. Not later than forty-five
(45) days after execution of the Amendment, IBM will provide the Inventory Information for the fourth quarter 2006. With respect to software license key information for the countries
transitioning on or before January 1, 2007, IBM will use commercially reasonable efforts to provide such information within forty five (45) days after execution of the Amendment. IBM
will work with DS to resolve any discrepancies between any customer's records and those provided to DS by IBM. In addition, IBM will provide DS with any useful information related to PLM prospects for
the SMB market in the CMSP countries and in the territories being transitioned to DS.

4.2.6
IBM will provide training or education required to ensure that DS personnel understand the IBM licensing terms and conditions for the purpose of the transition.

4.2.7
DS shall promptly notify the IBM PLM country transition focal point upon any effective transition of any IBM Transition Customer. Notification will be in the form of a report, indicating the
customer name, the customer number(s), the products and associated number of licenses, the customer address and the Customer Transition Date.

4.2.8
IBM will provide DS with a copy of any formal or written customers claim or action. IBM shall notify DS in writing of any discrepancy between the information contained in DS's report, as
provided in Section 4.2.7 and its own record of the transitioned inventory.

4.2.9
Products (including additional seats) ordered by a customer on or after the country transition date will be licensed under a non-IBM agreement unless otherwise provided in this
Amendment or unless otherwise agreed between the parties.

4.3
DS Transition Customers

4.3.1
DS Transition Customers will be transitioned to IBM. The DS Customer Transition Date shall be deemed to have occurred when: (a) for the DS Inventory, the DS Transition Customer has
terminated DS license agreements and entered into new license agreements with IBM (or any of its affiliates), and (b) IBM has notified DS as set forth in Section 4.3.5.

IBM
is responsible for transitioning DS customers to IBM and for obtaining written termination of the DS licenses by the DS Transition Customer, using a termination form to be agreed upon between IBM
and DS within thirty (30) days from the date of this Amendment. The parties agree that the customer will not be required to return or destroy any DS programs or documentation provided by DS.
Within thirty (30) days after the DS Customer Transition Date, DS will process the recurring charge refund due the customer, if any. It is expressly agreed that DS Transition Customers will be
entitled to continue to use the software keys provided by DS for the use of the corresponding software under an IBM license agreement. Replacement keys needed by DS Transition Customers following
transition will be provided by IBM.

IBM
will transition DELMIA or MaxtrixOne accounts when it sells new licenses to the corresponding DS Transition Customers, for a meaningful amount.

4.3.2
The terms of any unique (custom) contracts with customers that are a Named Account will be reviewed on a case-by-case basis by DS and IBM. DS will remain responsible for
all such agreements and customers while a determination is jointly made on the disposition of the contract and a transition plan is set up by DS and IBM.

4.3.3
DS agrees to provide IBM with appropriate discount authority and other terms and conditions via the special bid process to enable IBM to fulfill commitments, including IVO's, made to the
customer by DS.

4.3.4
Subject to confidentiality or privacy restrictions, DS will provide Inventory Information to enable IBM to identify and track the DS Transition Customer's installed base of DS PLM products. DS
will provide the
Inventory Information not later than forty-five (45) days after execution of this Amendment. DS will work with IBM to resolve any discrepancies between any customer's records and
those provided to IBM by DS.

4.3.5
IBM shall promptly notify the DS PLM country transition focal point upon any effective transition of any DS Transition Customer. Notification will be in the form of a report indicating the
customer name, the customer

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number(s),
the products and associated number of licenses, and the customer contact and address, and the Customer Transition Date.

4.3.6
Products (including additional seats) ordered by a customer on or after the DS Customer Transition Date will be licensed under an IBM agreement unless otherwise provided in this Amendment or
unless otherwise agreed between the parties.

4.3.7
DS will provide training or education required to ensure that IBM personnel understand the DS licensing terms and conditions for the purpose of the transition.

4.4
Each party will have responsibility for fulfilling all commitments and obligations under their respective customer agreements until the IBM or DS Customer transition date, as applicable.

5.0   CHANNEL

5.1
IBM may invite IBM PLM business partners in Named Accounts to support the IBM coverage. IBM will compensate the business partner in accordance with Section 5.4 below. On an exceptional
basis and with DS' prior written agreement, there may be Delegated Accounts, which shall be identified on the Named Account Lists. On Delegated Accounts, IBM will compensate the business partners in
accordance with the current fee model, and pay DS a channel management fee of [***] of the IBM PLM revenue recognized for the Delegated Account as compensation for managing the
business partner. For the avoidance of doubt, a channel management fee shall be due by IBM to DS in Japan for managing business partners associated with those Named Accounts that are subcontractors of
Toyota; this fee shall be [***] of the PLM revenue recognized by IBM from these Named Accounts. There will be no payment of a channel management fee to DS for IBM's use of a
business partner to support the IBM coverage.

5.2
DS will offer all current IBM PLM business partners an opportunity to become a DS business partner. DS will share the main elements of its general VAR agreement with IBM so that IBM can promote it
with the IBM PLM business partners.

5.3
Consistent with the Communications Plan described in Section 8.0, IBM and DS will jointly inform the IBM PLM business partners about changes in the coverage model promptly after this
Amendment is executed. The objective is to enable the business partner to adjust their infrastructure and business plans to minimize any impacts.

5.4
Upon execution of this Amendment, the Named Account List will be used as a reference for IBM PLM business partner commission and engagement rules in all countries. The fees (or discounts in
Asia Pacific) that are applicable for 2006, as set forth in the IBM PLM business partner agreement, will apply to all accounts which are not on the Named Account List when an IBM PLM business partner
has closed a sale in those accounts. For Named Accounts, where IBM PLM business partners are invited, the standard commission is [***]. IBM, in its sole discretion, can decide to pay the IBM PLM
business partner a higher fee or lower fee depending on the
level of work performed by the business partner, except when a level of fee has been set in Exhibits 1 to 3.

5.5
On the country transition date set forth in Exhibit 4, IBM will do the following:



5.6
The IBM commitment to pay a defined average level of commission on the total SMB revenue will end on December 31, 2006. IBM will keep the current fee model in the countries that have not
transitioned, in order for the IBM PLM business partners to continue to earn the same fees in percentage of transaction revenue as those applied before the date of this Amendment.

5.7
IBM will be solely responsible for IBM PLM business partner engagements in Named Accounts, subject to Section 5.1 above.

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5.8
IBM and DS will jointly manage the IBM PLM business partner transition in compliance with local laws and regulations, and to mitigate any issues or liabilities.

Both
parties agree to fully support the transition process with each IBM PLM business partner and work together to minimize any adverse consequences for the IBM PLM business partner in the context of
the transition. However, circumstances may arise where an IBM PLM business partner asserts a claim against IBM arising from the transition of its PLM business for Licensed Programs pursuant to this
Amendment (a "Transition Claim"). In the event a Transition Claim is made against IBM by an IBM PLM business partner, DS will defend each such claim and pay any settlement amounts it authorizes
and all costs, damages and attorneys' fees that a court or other tribunal awards to such IBM PLM business partner pursuant to a final decision, provided that IBM provides DS with timely written notice
of the claim such that DS's defense of the case is not hindered, and fully and timely cooperates with DS in the defense of the claim. Transition Claims do not include any claim to the extent such
claim, i) arises out of IBM's relationship and dealings with, or action vis a vis, the IBM PLM business partner (excluding, for the avoidance of doubt, the transition per se), or
ii) arises from IBM's failure to comply with its obligations under this Amendment, including its obligation to fully support the transition.

Any
IBM PLM business partner commissions for actual sales made by the business partner (i.e., where the order was placed with IBM) prior to transition, will remain an IBM responsibility
to pay.

5.9
IBM will provide DS a list of all current IBM PLM business partners within thirty (30) days from the date of this Amendment. DS will inform IBM when an IBM PLM business partner has entered
into a business partner agreement with DS.

5.10
For the management of PLM business partner satisfaction and the smooth transitioning of IBM PLM business partners, DS and IBM will nominate a focal point in each geography/country that is
responsible to manage this channel transition.

6.0   PRODUCT PORTFOLIO

6.1
DS will provide to IBM all DS products that replace or obsolete any existing products licensed to IBM, (including versions, releases, updates, corrections, and enhancements, whether under the
existing brand/product family designation or a different brand/product family designation), made Generally Available from time to time by DS to customers or the DS business partners' network. For the
purpose of this Section 6.1,"Generally Available" is defined as the general release of software as commercially available, directly or through licensees or business partners, for use by end
user customers, but does not include any products provided solely as a 'beta' version or created for a limited set of end users, or products available online (however, to the extent those products
would have a media distribution version they will be available to IBM under this Amendment).

IBM
and DS will negotiate in good faith a floor royalty amount per product based on the list price of the product and applying the royalty split corresponding to the coverage model.

If
DS makes a change in their business model such that a future product(s) is made available online, the parties will negotiate in good faith a possible participation of IBM in such service.

6.2
Announcement and availability of DELMIA and ENOVIA MatrixOne products will be on a mutually agreed schedule with DS product golden code and product information to be provided within three
(3) months from the execution date of this Amendment.

6.3
For DELMIA and ENOVIA MatrixOne, product launch roles, responsibilities, deliverables and schedule will be governed by the 1996 Agreement, and existing IBM/DS joint processes.

6.4
For all DS brands/product families, the products, releases, enhancements and corrections provided by DS to IBM will be at the latest level and on the same schedule as DS provides to their direct
and indirect licensees.

6.5
The coverage model for ENOVIA MatrixOne will move to IBM covered for all accounts listed in Exhibit 1, when MatrixOne applications will be integrated within ENOVIA VPLM applications,
subject to certification by DS of an agreed upon number of IBM sales representatives.

7.0   TECHNICAL SUPPORT

7.1
IBM will be responsible for Level 1 support activities and DS will be responsible for Levels 2 and 3 support activities for Named Accounts, consistently with the terms of the
1996 Agreement.

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7.2
IBM will maintain responsibility for Level 1 technical support activities provided under program services until the customer transitions to DS. On the Customer Transition Date, DS will
become responsible for all technical support activities (this includes the provision of service packs, PTFs, hot fixes, etc.).

7.3
Prior to the Country Transition Date, DS will inform IBM (i) on how IBM Transition Customers are to contact DS for technical support (i.e., via telephone or a technical support web
site) and (ii) what information the IBM Transition Customer will be required to provide to DS, so that IBM can advise such customers on obtaining technical support.

7.4
On the Customer Transition Date of an IBM Transition Customer, IBM will:



7.5
On the Customer Transition Date of an IBM Transition Customer, DS will:



7.6
On the customer transition date from DS to IBM, (i) IBM will be responsible for Level 1 technical support, and (ii) DS will continue to be responsible for Level 2 and
Level 3 technical support, consistent with current 1996 Agreement terms and IBM/DS processes. The following actions will be taken to implement the transfer of Level 1 responsibility for
the brands for which IBM provides Level 1 support. Currently, those brands are CATIA, ENOVIA VPLM and ENOVIA SMARTEAM.



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7.7
IBM and DS will coordinate availability and content of fix packages (Service Packs, PTFs, Hot Fixes, etc.) to ensure that the code being used and maintained for Named Accounts and all other
accounts is identical.

8.0   COMMUNICATIONS

The
parties agree that clear and consistent communications are required with all audiences to ensure that the changes being made, the timing, its impact, as well as the required actions are explained
and understood. DS and IBM will jointly develop and mutually agree on an external communications plan to meet that objective.

8.1
DS and IBM communications teams will work jointly to agree on a common communications plan and positioning.

8.2
IBM and DS will jointly prepare and agree upon:



8.3
Each party will be solely responsible for their internal communication which shall however be consistent with the common communication plan.

8.4
Once the communications plan is agreed upon, neither party will deviate from the agreed on plan, either in content or schedule, without written agreement of the other party.

8.5
Internal communications will be consistent with the messages and positioning of the external communications.

9.0   PRODUCT MARKETING

The
obligations and responsibilities of the parties for the DELMIA and ENOVIA MatrixOne products are the same as for the other Licensed Programs under the 1996 Agreement. Within three
(3) months from the date of this Amendment, the parties will separately document the product marketing roles and responsibilities of the parties to take into account the effect of the changes
implemented by this Amendment.

10.0 ROYALTIES

10.1
Royalty Incentives

10.1.1
DS will encourage IBM to grow revenue faster than "Market Growth" in the Named Accounts by providing a royalty incentive. The incentive will start at Named Account revenue growth equal to
"Market Growth" and will grow linearly to[***]of revenue at 2X "Market Growth". The incentive will apply to all Named Accounts
revenue from all current Brands and from the New DS Product Brands sold in the IBM coverage model. "Market Growth" will be the growth rate used by IBM for the PLM Application Software Market in
its Fall Plan each year (which is an average of three industry analysts), which shall exclude from the baseline used to compute revenue growth, any revenue from sales by DS or its business partners to
Named Accounts. Annually or on another timeframe as mutually agreed, the parties will document, via a letter or other form of agreement (e.g., contract amendment), the market growth rate and
any other conditions specific to that year(s).

The
process for measuring the revenue growth will be made in IBM Plan Rates. Then, the resulting incentive will be applied on the IBM Actual Revenue in $US.

10.1.2
A royalty incentive equal to[***]of the SMB revenue attainment in the CMSP countries will be earned by IBM for each
year in which DS is performing channel management responsibilities under the IBM/DS CMSP Agreement. The continuation of this incentive will remain subject to the ongoing level of operational support
provided by IBM to DS as the CMSP.

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10.2
For the New DS Product Brands, IBM will pay DS[***]royalties in the "IBM coverage" model and [***]royalties in the "Joint coverage" model,
according to Exhibits 2 and 3. Implementation of the "Joint
coverage" model is subject to IBM commissioning its sales resources involved on the full end-user revenue, consistent with the "IBM coverage" model. DS will pay IBM incentives of up to [***]in the
"Joint Coverage" model if certain revenue targets are met, and up to [***]in the "IBM coverage" model if certain revenue targets are met as described in Section 10.1 above. Such revenue
targets will be set as part of the "Fall Plan" process. During the first quarter of 2007, for implementation early 2007, IBM and DS shall negotiate either i) the continuation of this 85/15
revenue split with a DS compensation for IBM PCO3 extra-commissioning or ii) the implementation of a "business partner model" where DS shall receive a [***]fee in addition to its[***]royalties for the
application sale, and IBM shall perform the distribution, the Level 1, contract fulfillment and billing of its customers.

IBM
reserves the right to compensate its employees as it solely determines.

10.3
IBM will receive a[***]royalty incentive on all PLM SMB non-Named Account revenue recognized by IBM for
Licensed Programs through December 31, 2010.

10.4
Effective on the country transition date per Exhibit 4, IBM will pay DS a royalty of[***]of the country recurring
revenue streams recognized by IBM from accounts other than Named Accounts.

10.5
The royalty on revenue recognized from Named Accounts i) for the Licensed Programs licensed to IBM prior to the date of this Amendment will be as set forth in the 1996 Agreement section
entitled Royalties, and ii) for the New DS Product Brands, will be as set forth in Section 10.2 above.

10.6
It is estimated that the IBM worldwide non-Named Account total recurring revenue stream decline for Licensed Programs will occur gradually from the date of this Amendment through
December 31, 2010.







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10.7
The existing DS delegated discounts authority granted to IBM shall apply on a worldwide basis and in all countries, to the Named Accounts and all other IBM accounts agreed on through the
governance process. All prior withdrawals of delegated discount authority are superseded by the foregoing, but only for Named Accounts and other accounts (if any) agreed on through the
governance process.

10.8
DS guarantees to IBM continuation of delegated discount authority and approval of special bids for the Named Accounts, and other accounts covered by IBM prior to country transition or as agreed
upon through the governance process, consistent with past practice. At a minimum, for new purchases and product migrations, this means:



For
the avoidance of doubt, the above delegations shall in no circumstance prevent IBM from freely pricing the products to Named Accounts. Any further discounts to Named Accounts shall be exclusively
funded by IBM unless otherwise agreed between the parties.

10.9
Should DS offer more favorable prices, terms and conditions, or discounts directly or indirectly to an account on the Named Account List, DS shall give IBM an opportunity to match
DS's offer.

10.10
Payment to DS for channel management fees called for herein shall be made on a calendar quarter basis, thirty (30) days after the close of the quarter. Payment will be made with the
royalty payment due in that month.

11.0 GOVERNANCE

To
ensure appropriate focus and management oversight of the activities implemented by this Amendment, the parties agree the immediate governance model will include Named Account and Transitions
Councils, as set forth in more detail below in addition to the existing governance bodies established under the Agreement and summarized in Exhibit 6 to this Amendment. Within
forty-five (45) days after the date of this Amendment, the IBM PLM Worldwide Sales General Manager and the DS Executive Vice President Channel Sales will review the existing
governance bodies and make a final recommendation on the overall governance structure to reflect the current business environment.

11.1
Named Account Council:



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11.2
Customer Transition Council:

The
Customer Transition Council is responsible for ensuring a smooth transition of customers that are not Named Accounts. There will be a council in each geography, consisting of a designated IBM
sales leader and sales operations/admin leader and the corresponding DS sales leader. The council will monitor the progress of customer transitions and recurring revenue flow and resolve any issues.
Any issues that are not resolved by this Council will be taken to the respective IBM and DS Geography sales leaders for resolution. Any issues that cannot be resolved by the Geography sales leaders
will be referred to the IBM PLM Global Leader of Business Operations and the DS CFO to be resolved in their weekly meeting to discuss all IBM/DS business issues.

11.3
Named Account Critical Customer Satisfaction Situations

The
parties recognize that in the Named Accounts, customer satisfaction situations may arise and they agree that such situations should be solved by their respective local teams working in cooperation
to promptly provide a remedy. The parties further recognize that, notwithstanding the attempts of the local teams, certain situations may become critical (a "Critical Customer Satisfaction
Situation").





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The
Named Account Council will periodically analyze past customer satisfaction problems to proactively determine ways to prevent future Critical Customer Satisfaction problems from occurring.

11.4
Reduction of IBM PLM Staffing

To
monitor resource levels, each party will report to the other party its level of sales and support resources in accordance with the existing terms of the 1996 Agreement. On a quarterly basis, the
parties will review the resource levels in total and as appropriate, on a Named Account level.

The
parties recognize and agree that continuity and stability of the IBM PLM sales force is in the best interests of the parties, and the parties intend to manage to that objective. The parties
further recognize that resource level may vary based on revenue outlook.

In
the event IBM reduces its overall PLM sales and support resources:



12.0 GENERAL

12.1
This Agreement is nonexclusive and shall in no way preclude either party from developing, marketing or acquiring materials and programs which are competitive.

12.2
This Amendment replaces any prior oral or written agreements or other communication between the parties with respect to the subject matter of this Amendment.

Other
than the changes indicated above, it is understood that all other terms of the 1996 Agreement, including all Attachments and Exhibits thereto remain in full force and effect.

If
any provision of this Amendment or the 1996 Agreement shall be held to be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any
way be affected or impaired thereby, and such provision shall be deemed to be restated to reflect the original intentions of IBM and DS as nearly as possible in accordance with applicable law(s).

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The
parties agree that any reproduction of this Amendment by reliable means (such as facsimile or photocopy) will be considered an original of this Amendment.

|Agreed to:
Dassault Systemes, S.A.                          |                                            | Agreed to:
International Business Machines Corporation        
|----------------------------------------------------------- | ------------------------------------------ | --------------------------------------------------------------
|By:                                                         | /s/THIBAULT DE TERSANTAuthorized Signature |                                                               
|Name: Thibault de Tersant                                   |                                            | Name: Walter H. Donaldson, Jr.                                
|Title: Chief Financial Officer and Executive Vice President |                                            | Title: General Manager, Worldwide Product Lifecycle Management
|Date: January 2, 2007                                       |                                            | Date: January 2, 2007                                         

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