INTELLECTUAL PROPERTY AGREEMENT

       This INTELLECTUAL PROPERTY AGREEMENT ("Agreement") is dated as of October
28, 1996, between and among THE DUN & BRADSTREET CORPORATION, a Delaware
corporation ("D&B"), COGNIZANT CORPORATION, a Delaware corporation
("Cognizant"), and ACNIELSEN CORPORATION, a Delaware corporation ("ACNielsen")
(each a "Party" and collectively, the "Parties").

                                    RECITALS

       WHEREAS, D&B, acting through its direct and indirect subsidiaries,
currently owns various intellectual property rights used in connection with a
number of businesses, which businesses are described in the Distribution
Agreement dated as of October 28, 1996, among D&B, Cognizant and ACNielsen (the
"Distribution Agreement"); and

       WHEREAS, the Parties hereto have determined that this Agreement is
appropriate in order to effectuate the purposes of the Distribution Agreement as
described therein, and in order to promote a clear understanding of their
respective intellectual property rights subsequent to the execution of said
Distribution Agreement and the Distribution (as defined therein) contemplated
thereby;

       NOW, THEREFORE, in consideration of the mutual agreements, undertakings
and covenants herein and therein, the sufficiency of which is hereby
acknowledged, the Parties hereby agree as follows:

ARTICLE I. DEFINITIONS

       1. Except as may be set forth herein, all defined terms shall have the
meaning set forth in Article I, Section 1.1 of the Distribution Agreement.

       2. "Infringement" shall mean any unauthorized use or conduct in violation
or derogation of the rights in question.

       3. "Intellectual Property" shall mean all intellectual property rights
related to the Assets or Businesses of either D&B, Cognizant or ACNielsen as
defined in the Distribution Agreement, as they are now or may in future exist or
be conducted, including without limitation:

       a.     any and all rights, privileges and priorities arising under the
              laws or treaties of the United States, any state, territory or
              possession thereof, any other country or political subdivision or
              territory thereof, or the European


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              Community, relating to patents, copyrights, trade names,
              trademarks, service marks, mask works, trade secrets, inventions,
              databases, names and logos, trade dress, and other proprietary
              information and licenses from third persons granting the right to
              use any of the foregoing, including all registrations and
              applications for any of the foregoing that have been issued by or
              filed with the appropriate authorities, any common-law rights
              arising from the use of the foregoing, any rights commonly known
              as "industrial property rights" or the "moral rights" of authors
              relating to the foregoing, and all claims, causes of action, or
              other rights arising out of or relating to any actual or
              threatened Infringement by any person not a Party to this
              Agreement relating to the foregoing;

       b.     all computer applications, programs and other software, including
              without limitation operating software, network software, firmware,
              middleware, design software, design tools, systems documentation
              and instructions, except to the extent that they may be more
              specifically addressed in the Data Services Agreements; and

       c.     all cost information, sales and pricing data, customer prospect
              lists, supplier records, customer and supplier lists, customer and
              vendor data, correspondence and lists, product literature,
              artwork, design, development and manufacturing files, vendor and
              customer drawings, formulations and specifications, quality
              records and reports and other books, records, studies, surveys,
              reports, plans and documents.

       4. "Intellectual Property Disputes" shall mean any and all controversies,
disputes or claims arising out of, in connection with, or in relation to the
interpretation, performance, nonperformance, validity or breach of this
Agreement or otherwise arising out of, or in any way related to this Agreement
or the Intellectual Property, including, without limitation, any and all claims
based on contract, tort, statute or constitution.

       5. "LLC" shall mean CZT/ACN Trademarks, L.L.C., a Delaware limited
liability company to be jointly owned by Cognizant and ACN pursuant to the LLC
Agreement.

       6. "LLC Agreement" shall mean the agreement to be entered into by
Cognizant and ACNielsen substantially in the form of Schedule I.


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       7. "Nielsen Intellectual Property" shall mean those patents, trademarks,
service marks, registrations and applications therefor identified and described
in Article III of this Agreement.

ARTICLE II. OWNERSHIP OF INTELLECTUAL PROPERTY.

General Principles of Allocation and Recognition
------------------------------------------------
       Section 2.01. Without limiting any obligation or liability of D&B under
the Distribution Agreement or any Ancillary Agreement, and subject to the
provisions set forth in Article III below, each of the Parties hereto
acknowledges, recognizes and agrees that, after the Distribution, D&B (or
another member of the D&B Group) shall own all right, title and interest in all
Intellectual Property that (i) originated primarily with the conduct of the D&B
Business or primarily in connection with the D&B Assets; (ii) was obtained by,
or exclusively or primarily for the conduct of, the D&B Business or in
connection with the D&B Assets; (iii) was developed exclusively or primarily for
the conduct of the D&B Business or in connection with the D&B Assets; (iv) arose
from funding by, or exclusively or primarily for the benefit of the conduct of,
the D&B Business or in connection with the D&B Assets; or (v) as of the
Distribution Date is used or held for use exclusively or primarily for the
conduct of the D&B Business or in connection with the D&B Assets. If a conflict
exists between any of the subsections (i) through (iv) of this Section or of
Sections 2.02 or 2.03 on the one hand and subsection (v) of this Section on the
other hand, then subsection (v) of this Section 2.01 shall prevail.

       Section 2.02. Without limiting any obligation or liability of Cognizant
under the Distribution Agreement or any Ancillary Agreement, and subject to the
provisions set forth in Article III below, each of the Parties hereto
acknowledges, recognizes and agrees that, after the Distribution, Cognizant (or
another member of the Cognizant Group) shall own all right, title and interest
in all Intellectual Property that (i) originated primarily with the conduct of
the Cognizant Business or primarily in connection with the Cognizant Assets;
(ii) was obtained by, or exclusively or primarily for the conduct of, the
Cognizant Business or in connection with the Cognizant Assets; (iii) was
developed exclusively or primarily for the conduct of the Cognizant Business or
in connection with the Cognizant Assets; (iv) arose from funding by, or
exclusively or primarily for the benefit of the conduct of, the Cognizant
Business or in connection with the Cognizant Assets; or (v) as of the
Distribution Date is used or held for use exclusively or primarily for the
conduct of the Cognizant Business or in connection with the Cognizant Assets. If
a conflict exists between any of the subsections (i) through (iv) of this
Section or of Sections 2.01 or 2.03 on the one hand and subsection (v) of


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this Section on the other hand, then subsection (v) of this Section 2.02 shall
prevail.

       Section 2.03. Without limiting any obligation or liability of ACNielsen
under the Distribution Agreement or any Ancillary Agreement, and subject to the
provisions set forth in Article III below, each of the Parties hereto
acknowledges, recognizes and agrees that, after the Distribution, ACNielsen (or
another member of the ACNielsen Group) shall own all right, title and interest
in all Intellectual Property that (i) originated primarily with the conduct of
the ACNielsen Business or primarily in connection with the ACNielsen Assets;
(ii) was obtained by, or exclusively or primarily for the conduct of, the
ACNielsen Business or in connection with the ACNielsen Assets; (iii) was
developed exclusively or primarily for the conduct of the ACNielsen Business or
in connection with the D&B Assets; (iv) arose from funding by, or exclusively or
primarily for the benefit of the conduct of, the ACNielsen Business or in
connection with the ACNielsen Assets; or (v) as of the Distribution Date is used
or held for use exclusively or primarily for the conduct of the ACNielsen
Business or in connection with the ACNielsen Assets. If a conflict exists
between any of the subsections (i) through (iv) of this Section or of Sections
2.01 or 2.02 on the one hand and subsection (v) of this Section on the other
hand, then subsection (v) of this Section 2.03 shall prevail.

       Section 2.04. Certain Specified Items. Without limiting any obligation or
liability of any Party under the Distribution Agreement or any Ancillary
Agreement, and subject to the provisions set forth in Article III below, each of
the Parties hereto acknowledges, recognizes and agrees that, after the
Distribution, all right, title and interest in all Intellectual Property
relating to and associated with the items identified in Schedule A shall be
owned by or vested in the Party indicated therein. This provision is intended to
supplement the preceding Sections 2.01-2.03 with regard to these specified
items, and should not be construed in any manner that would tend to derogate
from the validity or applicability of the general principles of allocation and
recognition set forth therein. Nevertheless, if a conflict exists between this
Section 2.04 and Sections 2.01-2.03, then this Section 2.04 shall prevail.

       Section 2.05. Rights Arising in Future. Subject to the provisions set
forth in Article III below, each of the Parties hereto acknowledges, recognizes
and agrees that, after the Distribution Date, (i) any and all Intellectual
Property created by or on behalf of a Party, including common-law rights related
thereto, shall belong solely and exclusively to such Party; and (ii) any and all
subsequent ownership, possession and use by each Party of the Intellectual
Property that it will own subsequent to the Distribution pursuant to the terms
of this Agreement (excluding any possession or use pursuant to license


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granted by another Party), including common-law rights related thereto, shall
inure solely to such Party's own benefit.

       Section 2.06. No Warranties. Each of the Parties hereto understands and
agrees that, except as otherwise expressly provided, no Party hereto is, in this
Agreement or in any other agreement or document contemplated by this Agreement
or otherwise, making any representation or warranty whatsoever regarding the
Intellectual Property, including, without limitation, as to title, value or
legal sufficiency. It is also agreed and understood that any and all
Intellectual Property assets either transferred or retained by the Parties, as
the case may be, shall be "as is, where is".

       Section 2.07. Recognition of Non-Party Rights. The recognition among the
Parties of ownership of Intellectual Property rights under Sections 2.01-2.05 of
this Agreement is subject to all pre-existing rights, obligations and
restrictions of non-parties to this Agreement as of the Distribution Date.

ARTICLE III. NIELSEN INTELLECTUAL PROPERTY.

PATENTS AND PATENT APPLICATIONS

       Section 3.01. Notwithstanding the provisions of Article II of this
Agreement, each of the Parties hereto acknowledges, recognizes and agrees that,
after the Distribution, Cognizant shall own all right, title and interest in, to
and under those patents and patent applications previously owned by ACNielsen
identified in Schedule B, together with all Intellectual Property related
thereto and associated therewith, for the exclusive use and benefit of Cognizant
in connection with the Cognizant Business as it is now or may hereafter be
conducted anywhere in the world.

       Section 3.02. Without limiting the generality of the provisions of
Article II of this Agreement, and notwithstanding anything therein to the
contrary, each of the parties hereto acknowledges, recognizes and agrees that,
after the Distribution, ACNielsen shall own all right, title and interest in, to
and under those patents and patent applications identified in Schedule C,
together with all Intellectual Property related thereto and associated
therewith, for the exclusive use and benefit of ACNielsen in connection with the
ACNielsen Business as it is now or may hereafter be conducted anywhere in the
world.

       Section 3.03. Notwithstanding the provisions of Article II of this
Agreement, each of the Parties hereto acknowledges, recognizes and agrees that
NCH Promotional Services, Inc., shall own all right, title and interest in, to
and under those patents identified in Schedule D, together with all Intellectual
Property related thereto and associated therewith, for the exclusive use and
benefit of NCH Promotional


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Services, Inc., in connection with its business as it is now or may hereafter be
conducted anywhere in the world.

TRADEMARKS AND TRADEMARK APPLICATIONS

       Section 3.04. Notwithstanding the provisions of Article II of this
Agreement, each of the Parties hereto acknowledges, recognizes and agrees that,
after the Distribution, Cognizant shall own all right, title and interest in, to
and under those trademarks, service marks, registrations and applications
therefor identified in Schedule E, together with all goodwill and Intellectual
Property related thereto and associated therewith, for the exclusive use of
Cognizant in connection with the Cognizant Business as it is now or may
hereafter be conducted anywhere in the world.

       Section 3.05. Without limiting the generality of the provisions of
Article II of this Agreement, and notwithstanding anything therein to the
contrary, each of the Parties hereto acknowledges, recognizes and agrees that,
after the Distribution, ACNielsen shall own all right, title and interest in, to
and under those trademarks, service marks, registrations and applications
therefor identified in Schedule F, together with all goodwill and Intellectual
Property related thereto and associated therewith, for the exclusive use of
ACNielsen in connection with the ACNielsen Business as it is now or may
hereafter be conducted anywhere in the world.

       Section 3.06. Notwithstanding the provisions of Article II of this
Agreement, each of the Parties hereto acknowledges, recognizes and agrees that
NCH Promotional Services, Inc., shall own all right, title and interest in, to
and under those trademarks, service marks, registrations and applications
therefor identified in Schedule G, together with all goodwill and Intellectual
Property related thereto and associated therewith, for the exclusive use and
benefit of NCH Promotional Services, Inc., in connection with its business as it
is now or may hereafter be conducted anywhere in the world.

       Section 3.07. Notwithstanding the provisions of Article II of this
Agreement, each of the Parties hereto acknowledges, recognizes and agrees that,
after the Distribution, all right, title and interest in, to and under those
trademarks, service marks, registrations and applications therefor identified in
Schedule H, together with all goodwill and Intellectual Property related thereto
and associated therewith, shall be owned by the LLC, which shall have sole
responsibility for maintaining and preserving the quality of those trademarks,
service marks, registrations and applications therefor in a manner consistent
with the high standards and reputation for quality associated with the "NIELSEN"
name. The LLC will be organized and governed according to the LLC Agreement,
substantially in the form of Schedule I and as it may be amended or modified by
Cognizant and ACNielsen pursuant to its terms, with the fundamental purpose at


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       all times of assisting both Cognizant and ACNielsen in achieving their
legitimate business purposes to the greatest extent possible while also
preserving the integrity of the trademarks, service marks, registrations and
applications therefor owned by the LLC and minimizing the risk of confusion to
any relevant group of consumers for any product or service associated with any
such trademark, service mark, registration or application therefor. Schedule H
also identifies those trademark and service mark applications that may not be
immediately transferred or assigned to the LLC under the law prevailing in the
relevant jurisdiction. Legal ownership of each such application shall be
retained by ACNielsen for the benefit of the LLC pursuant to an escrow agreement
until such application is granted; at which time the registration and all
goodwill and Intellectual Property related thereto and associated therewith, if
any, shall be transferred to the LLC, as shall be specified in both the LLC
Agreement and the pertinent escrow agreement. If either Cognizant or ACNielsen
desires to use, register and/or apply for registration of any trademark or
service mark incorporating, referring to or derived from the "NIELSEN" name or
"split-N" symbol in any country or with any authority where no such trademark or
service mark has previously been used, registered or applied for, the party
desiring to make such use, registration or application shall cause the LLC to
determine, by obtaining the advice of counsel with expertise in the law
prevailing in the relevant jurisdiction, whether that country or authority is an
Associated Marks Country (as defined in the LLC Agreement) before making any
such use, registration or application. That party shall not use, register or
apply for any such trademark or service mark unless and until the LLC has
determined that the country or authority in question is not an Associated Marks
Country, or if it is determined to be an Associated Marks Country, shall proceed
with the use, registration or application of such trademark or service mark only
as a Common Heritage Trademark as defined in and subject to the LLC Agreement.

       Section 3.08. Reversion of Certain Property. Schedule H also identifies
certain trademarks and service marks incorporating, referring to or derived from
the "NIELSEN" name or "split-N" symbol that shall be distributed, together with
all goodwill and Intellectual Property related thereto and associated therewith,
by the LLC to either Cognizant or ACNielsen as indicated therein and to the
extent appropriate under the LLC Agreement, in the event that the relevant local
law pursuant to which rights in such trademarks or service marks are granted
should subsequently, in the opinion of counsel to the LLC with expertise in the
relevant local law, both (a) permit the ownership of such trademarks or service
marks by unrelated entities without substantial jeopardy to their validity or
enforceability, and (b) not present a substantial likelihood of denial for any
future application for registration of such trademarks or service marks, if
applications for concurrent registration of such trademarks or service marks for
similar goods or services or for goods or services in the same class were


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to be made by unrelated entities. In no event, however, shall any trademark or
service mark consisting of the "NIELSEN" name or the "split-N" symbol, standing
alone, be so distributed, for so long as both Cognizant and ACNielsen shall
continue to use any trademark or service mark anywhere in the world
incorporating, referring to or derived from the "NIELSEN" name.

       Section 3.09. Clear Identification of Source. Cognizant and ACNielsen
agree that, subsequent to the Distribution Date, neither Cognizant nor ACNielsen
shall possess or acquire any right to use the "NIELSEN" name or "split-N" symbol
standing alone or by itself in any manner for any purpose, including use of the
name as an Internet domain name or the equivalent or as the name or logo for a
business, corporation, or other legal entity, except as may otherwise be agreed
by and between Cognizant and ACNielsen; provided, however, that both Cognizant
and ACNielsen may continue to use the "NIELSEN" name or "split-N" symbol in any
usage for which each, respectively, is currently using the name or symbol,
including usage of the name as part of electronic mail or messaging addresses
for its employees using existing systems, during a transitional period of six
months subsequent to the Distribution Date or under the circumstances specified
in Section 2.14(b)(iii) of the Distribution Agreement (a "Transitional Use").
Subsequent to the Distribution Date, except for a Transitional Use, any use that
Cognizant or ACNielsen may make of the "NIELSEN" name or "split- N" symbol for
any business purpose, including any use in trade, advertising, publicity,
packaging, or labeling, and including any use of any trademark or service mark
identified in Schedule H or in Schedules E and F that incorporates, refers to,
or is derived from the "NIELSEN" name or "split-N" symbol, shall only be made in
conjunction with other words, names, symbols or logos prominently displayed in
as near proximity thereto as is reasonably feasible and, at minimum, on the same
page, panel, sheet or screen therewith, clearly identifying the source of the
communication, good or service: (a) with regard to Cognizant, as "NIELSEN TV,"
"NIELSEN MEDIA," "NIELSEN MEDIA RESEARCH," or another entity using a name not
incorporating, referring to, or derived from the "NIELSEN" name; and (b) with
regard to ACNielsen, as "ACNIELSEN," "A.C. NIELSEN," or another entity using a
name not incorporating, referring to, or derived from the "NIELSEN" name. In
addition, in the event that ACNielsen enters into any television audience
measurement business in the United States or Canada subsequent to the
Distribution Date, its use of any name incorporating, referring to, or derived
from the "NIELSEN" name in connection with such business shall be subject to the
provisions of Schedule J.

       Section 3.10. Limitations on Concurrent Use. The provisions in this
Article shall in no way restrict the rights of Cognizant or ACNielsen to sell
any product or service or enter into any business identical or similar to any
product or service sold, or business conducted by, the other before or after the
Distribution Date. Cognizant and ACNielsen agree, however, that


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in the event that either Cognizant or ACNielsen sells any product or service, or
enters into any business, after the Distribution Date in any country that is
identical or substantially similar to those sold or conducted by the other in
that country prior to the Distribution Date, the second party desiring to sell
such a similar product or service or desiring to enter such a similar business
shall not use any name incorporating, referring to or derived from the "NIELSEN"
name or the "split-N" symbol to describe or identify such product, service, or
business; provided that any product, service or business relating to the
measurement of Internet usage or to research and analysis of Internet usage,
utilization, advertising, or purchasing patterns, by businesses or consumers,
shall not be subject to such restriction and shall only be subject to the
restrictions set forth in Section 3.09, and provided further that any product or
service that may in future be sold by ACNielsen in connection with any
television audience measurement business in the United States or Canada shall be
subject to both this restriction and the provisions of Schedule J. Cognizant and
ACNielsen further agree that any future use of any Common Heritage Trademark (as
defined in the LLC Agreement) shall only be made by or pursuant to license from
the LLC.

       Section 3.11. Clear Fields. Cognizant and ACNielsen agree that,
subsequent to the Distribution Date, neither Cognizant nor ACNielsen shall use
as a trademark or service mark (except pursuant to license), register or attempt
to register any trademark or service mark (whether registered or not) that has
been used (except pursuant to license), owned or applied for by the other in any
country or geographic area as of the Distribution Date, including but not
limited to those trademarks and service marks identified in Schedules A, F, G
and H, in either that country or geographic area or in any other country or
geographic area. This provision shall not apply to the "MIDAS" trademark used
and/or registered by ACNielsen in Germany, the "MIDAS" trademarks or service
marks used and/or registered by IMS (Cognizant) in Germany and elsewhere, the
"PRIZMA" trademark used and/or registered by IMS (Cognizant) in Greece, the
"PRISMA FOLDER" trademark used and/or registered in the Benelux countries by
ACNielsen, the "NIELSEN PRISMA" trademark used and/or registered in Germany by
ACNielsen, the "PROMOTRAK" trademark or service mark used and/or registered by
IMS (Cognizant) in the United States, or the "PROMOTRACK" name and/or trademark
or service mark used and/or registered by ACNielsen elsewhere in the world. With
regard to these specific items, each party shall retain and have such rights
with respect to such items that it would otherwise have or become entitled to
under the laws of any relevant jurisdiction in the absence of this provision.

       Section 3.12. Notice and Publicity. Prior to or subsequent to the
Distribution, both Cognizant and ACNielsen agree to give or cause to be given,
in each distinct geographic area or line of business in which they intend to
operate or to sell any product or service, such notice and publicity of their


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separation and distinct identities as the source of any such business, product
or service as may be reasonable under the circumstances or required by the
relevant local law, where the local law imposes such a duty so to notify and/or
publicize.

       Section 3.13. Internet Hyperlinks. Cognizant and ACNielsen agree to
assign and transfer all rights in the existing "nielsen.com" Internet domain
name to the LLC, and to cause the LLC to provide and maintain an Internet or Web
site using that domain name for the purpose of providing and maintaining
"hyperlinks" to the principal Internet or Web sites maintained by both Cognizant
and ACNielsen. In addition, both Cognizant and ACNielsen agree to provide and
maintain in any Internet or Web site maintained by Cognizant or ACNielsen,
respectively, for a period of two (2) years subsequent to the Distribution Date,
a hyperlink to the principal Internet or Web site maintained by the other. All
such hyperlinks shall be displayed together with appropriate text indicating the
nature and purpose of the hyperlink and describing in summary the separation and
distinct identities of each as sources of their respective goods and services.
Cognizant and ACNielsen further agree to cooperate reasonably in the
identification of appropriate addresses and/or domain names and in resolving
technical issues necessary to provide and maintain such hyperlinks.

       Section 3.14. Assignments and Sublicenses; Remedies for Improper Use.
Cognizant and ACNielsen agree that any form of transfer of, or grant of rights
in or to, any trademark or service mark (whether registered or not)
incorporating, referring to or derived from the "NIELSEN" name or "split-N"
symbol (including, but not limited to, all rights received by either Cognizant
or ACNielsen pursuant to license from the LLC) by either Cognizant or ACNielsen
(the "Granting Party") to a non- party to this Agreement shall be made
explicitly subject to all pertinent provisions of Article III of this Agreement
concerning the Granting Party's own use of any such trademark or service mark,
and notice shall be given by the Granting Party to the Party other than the
Granting Party (the "Interested Party") of any such transfer or grant of rights.
Any such grant of rights that is not an outright transfer, assignment, sale or
disposition of all of the Granting Party's rights and interests in any such
trademark or service mark, including any sub-license, consent or permission to
use, to a non-party to this Agreement (a "Grantee") shall be pursuant to a
written instrument that shall both (a) explicitly bind the Grantee to all
pertinent provisions of this Agreement restricting the Granting Party's own use
of any such trademark or service mark, and (b) explicitly provide that the
Granting Party may revoke the grant of rights, in its sole discretion, upon not
more than thirty days' notice to the Grantee. It shall be the obligation of the
Granting Party to use its best efforts to police the use made of any such
trademark or service mark by a Grantee. If the Granting Party reasonably
believes that a Grantee is using any such trademark or service mark in a manner
that is (c) inconsistent with the terms of this 


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Agreement or (d) injurious to the high standards and reputation for quality
associated with the "NIELSEN" name (an "Improper Use"), the Granting Party shall
promptly so notify both the Grantee and the Interested Party. If the Grantee
does not thereafter correct or terminate the Improper Use within thirty days,
the Granting Party shall revoke the grant of rights to the Grantee, and shall
give notice thereof to the Interested Party. If the Interested Party reasonably
believes that the use made by a Grantee of rights granted by the Granting Party
is an Improper Use, it may so notify the Granting Party, which shall thereupon
take appropriate measures to investigate the use in question and shall notify
the Interested Party within fourteen (14) days as to whether it also reasonably
believes that the Grantee is engaging in an Improper Use. If the Granting Party,
after receiving notice from the Interested Party, also reasonably believes that
the Grantee is engaging in an Improper Use, it shall take all appropriate
measures to correct or terminate the Improper Use, including the giving of
notice of revocation to the Grantee, if necessary. If the Granting Party (x)
gives notice to the Interested Party that it does not reasonably believe that a
Grantee is engaging in an Improper Use, or (y) fails to take appropriate
measures to correct or terminate an Improper Use after giving notice to the
Interested Party that it reasonably believes a Grantee is engaging in an
Improper Use, or (z) is unable to correct or terminate an Improper Use by a
Grantee within sixty (60) days of the first notice of suspected Improper Use
given by either the Granting Party or the Interested Party, the Interested Party
may both commence any action or proceeding at law or equity that it believes it
has an appropriate and independent basis to assert against the Grantee and
invoke its contractual rights against the Granting Party in the event of an
Intellectual Property Dispute as defined in this Agreement.

       Section 3.15. Duty to Avoid Confusion. The Parties hereto confirm their
belief that likelihood of confusion will not result from the Parties' use of
their respective trademarks and service marks as provided for in this Agreement,
due to the differences in the environments in which and the customers to whom
the goods and services of the Parties associated therewith are primarily offered
and sold. The Parties further believe that any potential future confusion will
be prevented under the terms of this Agreement. Furthermore, in order to enable
and permit each other to continue using and to register their respective
trademarks and service marks and to ensure that there is no confusion in any
relevant marketplace between them, the Parties agree to use their best efforts
to avoid actual or potential confusion arising from their use, to advise any
other affected Party of any instance of actual or potential confusion that comes
to a Party's attention concerning use of their respective trademarks and service
marks, to take all such steps as may be appropriate and necessary to remedy any
actual or potential confusion caused by their actions, and to cooperate with
each other in good faith to avoid and prevent actual or potential confusion.


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       Section 3.16. Consent to Registration. Subject to the other provisions of
this Article, each Party agrees that any other Party may use a copy of this
Agreement to evidence the other Party's express consent to registration of the
Party's trademarks or service marks, if necessary to obtain or maintain a
registration of such mark in the United States Patent and Trademark Office or
any other pertinent governmental agency in any country or group of countries;
and further agrees to take any other necessary action that any other Party may
reasonably request to express or confirm such consent.

       Section 3.17. Transfer at or Prior to Distribution. The Parties agree to
execute all such documents, and to take all such actions, prior to or at the
Distribution as they may deem to be necessary to achieve or confirm the
respective ownership of rights in the Nielsen Intellectual Property as
contemplated in this Article to be effective upon the Distribution Date.

       Section 3.18. Construction. In the event of any inconsistency between
Article III and Article II of this Agreement with respect to the Nielsen
Intellectual Property, then Article III shall prevail.

ARTICLE IV. FURTHER ASSURANCES AND COOPERATION.

       Section 4.01. Without limiting the obligations of any party under Article
III of this Agreement, each Party hereto shall execute and deliver, or cause to
be executed and delivered, as and when reasonably requested by any other Party
hereto, all such documents and instruments and shall take, or cause to be taken,
all such further or other actions as such other Party may reasonably deem
necessary or desirable to effect the purposes of this Agreement and/or to
clarify or confirm the respective ownership rights of the Parties as provided
for in this Agreement.

       Section 4.02. Without limiting the obligations of any party under Article
III of this Agreement, each Party hereto shall reasonably cooperate with the
other Parties with respect to any government filings or any other actions
reasonably necessary to maintain and enforce the rights to the Intellectual
Property covered by this Agreement.

       Section 4.03. Without limiting the obligations of any Party under
Article III of this Agreement, each Party hereto shall, upon the prior written
request of another Party, arrange for the provision of appropriate copies of
Records in its possession or control (or the originals thereof if the Party
making the request has a reasonable need for such originals) created prior to
the Distribution Date and relating to the Intellectual Property, as soon as
reasonably practicable following the receipt of such request, but only to the
extent 


<PAGE>

                                                                              13

such items are not already in the possession or control of the requesting Party.

ARTICLE V. INDEMNIFICATION.

       Section 5.01. Article III of the Distribution Agreement shall govern the
rights of D&B, Cognizant and ACNielsen with respect to indemnification for any
and all Indemnifiable Losses incurred by any Party related to the Intellectual
Property.

ARTICLE VI. DISPUTE RESOLUTION.

       Section 6.01. Article VI of the Distribution Agreement shall govern the
rights of D&B, Cognizant and ACNielsen with respect to dispute resolution. The
term "Agreement Dispute" in that Article shall be read to include all
Intellectual Property Disputes.

ARTICLE VII. MISCELLANEOUS.

       Section 7.01. Complete Agreement; Construction. This Agreement, the
Schedules thereto, the Distribution Agreement, the LLC Agreement and the Data
Services Agreements shall constitute the entire agreement between the Parties
with respect to the subject matter hereof and shall supersede all previous
negotiations, commitments and writings with respect to such subject matter. In
the event of any inconsistency between this Agreement and any Schedule thereto,
the Schedule shall prevail. In the event of any inconsistency between this
Agreement and the LLC Agreement, this Agreement shall prevail. Other than
Sections 2.7, 2.14 and 4.5 of the Distribution Agreement, which shall prevail
over any inconsistent or conflicting provisions in this Agreement
notwithstanding any other provisions in this Agreement to the contrary, in the
event and to the extent that there shall be an inconsistency between the
provisions of this Agreement and the provisions of the Distribution Agreement,
this Agreement shall prevail.

       Section 7.02. Other Agreements. This Agreement is not intended to
address, and should not be interpreted to address, the matters specifically and
expressly covered by the Distribution Agreement and/or other Ancillary
Agreements.

       Section 7.03. Counterparts. This Agreement may be executed in one or more
counterparts, all of which shall be considered one and the same agreement, and
shall become effective when one or more such counterparts have been signed by
each of the Parties and delivered to the other Parties.


<PAGE>

                                                                              14

       Section 7.04. Survival of Agreements. Except as otherwise contemplated by
this Agreement, all covenants and agreements of the Parties contained in this
Agreement shall survive the Distribution Date.

       Section 7.05. Expenses. Except as otherwise set forth in this Agreement,
the LLC Agreement, the Distribution Agreement or any Ancillary Agreement, all
costs and expenses incurred on or prior to the Distribution Date (whether or not
paid on or prior to the Distribution Date) in connection with the preparation,
execution, delivery and implementation of this Agreement and the consummation of
the transactions contemplated thereby shall be charged to and paid by D&B.
Except as otherwise set forth in this Agreement, the LLC Agreement, the
Distribution Agreement or any Ancillary Agreement, all costs and expenses
incurred after the Distribution Date in connection with the implementation of
this Agreement, the consummation of this Agreement or the transactions
contemplated by this Agreement shall be charged to and paid by D&B. Except as
otherwise set forth in this Agreement and the LLC Agreement, each Party shall
bear its own costs and expenses related to the Intellectual Property incurred
after the Distribution Date, including the performance of any obligation arising
under Articles III and IV of this Agreement.

       Section 7.06. Notices. All notices and other communications hereunder
shall be in writing and hand delivered or mailed by registered or certified mail
(return receipt requested) or sent by any means of electronic message
transmission with delivery confirmed (by voice or otherwise) to the Parties at
the following addresses (or at such other addresses for a Party as shall be
specified by like notice) and will be deemed given on the date on which such
notice is received:

                  To The Dun & Bradstreet Corporation:

                  One Diamond Hill Road
                  Murray Hill, NJ 07974
                  Telecopy:  (908) 665-5803

                  Attn:  General Counsel

                  To Cognizant Corporation:

                  200 Nyala Farms
                  Westport, Connecticut 06880
                  Telecopy:  (203) 222-4201

                  Attn:  General Counsel


<PAGE>

                                                                              15

                  To ACNielsen Corporation:

                  177 Broad Street
                  Stamford, Connecticut 06901
                  Telecopy:  (203) 961-3179

                  Attn:  General Counsel

            Section 7.07. Waivers. The failure of any Party to require strict
performance by any other Party of any provision in this Agreement will not waive
or diminish that Party's right to demand strict performance thereafter of that
or any other provision hereof.

       Section 7.08. Amendments. Subject to the terms of Section 7.11 hereof,
this Agreement may not be modified or amended except by an agreement in writing
signed by each of the Parties hereto.

       Section 7.09. Assignment. This Agreement shall not be assignable, in
whole or in part, directly or indirectly, by any Party hereto without the prior
written consent of the other Parties hereto, and any attempt to assign any
rights or obligations arising under this Agreement (except as set forth in
Section 3.14) without such consent shall be void.

       Section 7.10. Successors and Assigns. The provisions to this Agreement
shall be binding upon, inure to the benefit of and be enforceable by the Parties
and their respective successors and permitted assigns.

       Section 7.11. Termination. This Agreement may be terminated and may be
amended, modified or abandoned at any time prior to the Distribution by and in
the sole discretion of D&B without the approval of Cognizant or ACNielsen or the
shareholders of D&B. In the event of such termination, no Party shall have any
liability of any kind to any other Party or any other person. After the
Distribution, this Agreement may not be terminated except by an agreement in
writing signed by the Parties.

       Section 7.12. Subsidiaries. Each of the Parties hereto shall cause to be
performed, and hereby guarantees the performance of, all actions, agreements and
obligations set forth herein to be performed by any Subsidiary of such Party or
by any entity that is contemplated to be a Subsidiary of such Party on and after
the Distribution Date.

       Section 7.13. Third Party Beneficiaries. This Agreement is solely for the
benefit of the Parties hereto and their respective Subsidiaries and Affiliates
and should not be deemed to confer upon third Parties any remedy, claim,
liability, 


<PAGE>

                                                                              16

reimbursement, claim of action or other right in excess of those existing
without reference to this Agreement.

       Section 7.14. Title and Headings. Titles and headings to sections herein
are inserted for the convenience of reference only and are not intended to be a
part of or to affect the meaning or interpretation of this Agreement.

       Section 7.15. GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO
CONTRACTS MADE AND TO BE PERFORMED IN THE STATE OF NEW YORK.

       Section 7.16. Consent to Jurisdiction. Without limiting the provisions of
Article VI hereof, each of the Parties irrevocably submits to the exclusive
jurisdiction of (a) the Supreme Court of the State of New York, New York County,
and (b) the United States District Court for the Southern District of New York,
for the purposes of any suit, action or other proceeding arising out of this
Agreement or any transaction contemplated hereby. Each of the Parties agrees to
commence any action, suit or proceeding relating hereto either in the United
States District Court for the Southern District of New York or if such suit,
action or other proceeding may not be brought in such court for jurisdictional
reasons, in the Supreme Court of the State of New York, New York County. Each of
the Parties further agrees that service of any process, summons, notice or
document by U.S. registered mail to such Party's respective address set forth
above shall be effective service of process for any action, suit or proceeding
in New York with respect to any matters to which it has submitted to
jurisdiction in this Section 7.16. Each of the Parties irrevocably and
unconditionally waives any objection to the laying of venue of any action, suit
or proceeding arising out of this Agreement or the transactions contemplated
hereby in (i) the Supreme Court of the State of New York, New York County, or
(ii) the United States District Court for the Southern District of New York, and
hereby further irrevocably and unconditionally waives and agrees not to plead or
claim in any such court that any such action, suit or proceeding brought in any
such court has been brought in an inconvenient forum.

       Section 7.17. Severability. In the event any one or more of the
provisions contained in this Agreement should be held invalid, illegal or
unenforceable in any respect, the validity, legality and enforceability of the
remaining provisions contained herein and therein shall not in any way be
affected or impaired thereby. The Parties shall endeavor in good-faith
negotiations to replace the invalid, illegal or unenforceable provisions with
valid provisions, the economic effect of which comes as close as possible to
that of the invalid, illegal or unenforceable provisions.


<PAGE>

                                                                              17

       IN WITNESS WHEREOF, the Parties have caused this Agreement to be duly
executed as of the day and year first above written.


                                    THE DUN & BRADSTREET CORPORATION

                                    By: /s/ VOLNEY TAYLOR
                                        ---------------------------
                                    Name: Volney Taylor
                                    Title: Executive Vice President


                                    COGNIZANT CORPORATION

                                    By: /s/ ROBERT E. WEISSMAN
                                        ---------------------------
                                    Name: Robert E. Weissman
                                    Title: Chairman & CEO


                                    ACNIELSEN CORPORATION

                                    By: /s/ NICHOLAS L. TRIVISONNO
                                        ---------------------------
                                    Name: Nicholas L. Trivisonno
                                    Title: Chairman & CEO