EMPLOYEE BENEFITS AGREEMENT

                  This EMPLOYEE BENEFITS AGREEMENT is dated as of October 28,
1996 (the "Agreement"), among THE DUN & BRADSTREET CORPORATION, a Delaware
corporation ("D&B"), COGNIZANT CORPORATION, a Delaware corporation,
("Cognizant"), and ACNIELSEN CORPORATION, a Delaware corporation ("ACNielsen").

                  WHEREAS, the Board of Directors of D&B has determined that it
is appropriate, desirable and in the best interests of the holders of shares of
common stock, par value $1.00 per share, of D&B (the "D&B Common Stock") to take
certain steps to reorganize D&B's Subsidiaries (as defined herein) and
businesses and then to distribute to the holders of the D&B Common Stock all the
outstanding shares of common stock of Cognizant, together with the appurtenant
share purchase rights (the "Cognizant Common Shares"), and all the outstanding
shares of common stock of ACNielsen, together with the appurtenant share
purchase rights (the "ACNielsen Common Shares"); and

                  WHEREAS, each of D&B, Cognizant and ACNielsen has determined
that it is necessary and desirable to allocate and assign responsibility for
certain employee benefit matters in respect of such entities on and after the
Effective Time (as defined herein).

                  NOW, THEREFORE, in consideration of the mutual promises and
covenants contained herein, D&B, Cognizant and ACNielsen agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

                  SECTION 1.1.  Definitions.  Capitalized terms used in
this Agreement shall have the following meanings:

                  "ACNielsen" shall mean ACNielsen Corporation, a
Delaware corporation.

                  "ACNielsen Bifurcated Savings Plan Employees" shall have the
meaning set forth in Section 3.3(a) of this Agreement.

                  "ACNielsen Common Shares" shall have the meaning set
forth in the recitals hereto.

                  "ACNielsen Employees" shall mean persons who, immediately
after the Effective Time, are employed by the ACNielsen Group (including persons
who are absent from work by reason of layoff or leave of absence and inactive
employees treated as such by agreement therewith).

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                                                                               2


                  "ACNielsen Group" shall mean ACNielsen and each Business
Entity which is contemplated to remain or become a Subsidiary of ACNielsen
pursuant to the Distribution Agreement.

                  "ACNielsen Lump-Sum Savings Plan Employees" shall have the
meaning set forth in Section 3.3(a) of this Agreement.

                  "ACNielsen Replacement Plan" shall mean the replacement plan
to be adopted by ACNielsen pursuant to Section 6.1(c) of this Agreement.

                  "ACNielsen Retirement Eligible Employees" shall have the
meaning set forth in Section 5.6 of this Agreement.

                  "ACNielsen Retirement Plan" shall mean the defined benefit
plan to be adopted by ACNielsen pursuant to Section 2.3(a) of this Agreement.

                  "ACNielsen Retirement Plan Effective Date" shall have the
meaning set forth in Section 2.3(a) of this Agreement.

                  "ACNielsen Retirement Plan Segregation Ratio" shall equal a
fraction, the numerator of which is the Present Value of the accrued vested and
nonvested benefits (as defined in ERISA Section 4044(a)(1)-(6)) of the ACNielsen
Transferred Retirement Plan Employees under the D&B Retirement Plan at the
Effective Time, and the denominator of which is the Present Value of the accrued
vested and nonvested benefits (as defined in ERISA Section 4044(a)(1)-(6)) of
the D&B Pre-Distribution Employees under the D&B Retirement Plan at the
Effective Time.

                  "ACNielsen Retirement Plan Transfer Date" shall have the
meaning set forth in Section 2.3(b) of this Agreement.

                  "ACNielsen Savings Plan" shall mean the defined contribution
plan to be adopted by ACNielsen pursuant to Section 3.3(a) of this Agreement.

                  "ACNielsen Savings Plan Transfer Date" shall have the meaning
set forth in Section 3.3(b) of this Agreement.

                  "ACNielsen Transferred Retirement Plan Employees" shall have
the meaning set forth in Section 2.3(a) of this Agreement.

                  "ACNielsen Transferred Savings Plan Employees" shall have the
meaning set forth in Section 3.3(a) of this Agreement.

                  "Action" shall mean any action, suit, arbitration, inquiry,
proceeding or investigation by or before any court, any governmental or other
regulatory or administrative agency, body or commission or any arbitration
tribunal.

                  "Affiliate" shall mean, when used with respect to a specified
person, another person that controls, is controlled by, 

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                                                                               3



or is under common control with the person specified. As used herein, "control"
means the possession, directly or indirectly, of the power to direct or cause
the direction of the management and policies of such person, whether through the
ownership of voting securities or other interests, by contract or otherwise.

                  "Ancillary Agreements" shall mean all of the written
agreements, instruments, assignments or other written arrangements (other than
this Agreement and the Distribution Agreement) entered into in connection with
the transactions contemplated by this Agreement and the Distribution Agreement,
including, without limitation, the Conveyancing and Assumption Instruments, the
Data Services Agreements, the Intellectual Property Agreement, the Shared
Transaction Services Agreements, the Tax Allocation Agreement and the Transition
Services Agreement.

                  "Assets" shall have the meaning set forth in Section
1.1(q) of the Distribution Agreement.

                  "Board of Directors" shall mean, when used with respect to a
specified corporation, the board of directors of the corporation so specified.

                  "Business Entity" shall mean any corporation, partnership,
limited liability company or other entity which may legally hold title to
Assets.

                  "COBRA" shall mean the Consolidated Omnibus Budget
Reconciliation Act of 1985, as amended, and the regulations promulgated
thereunder, including any successor legislation.

                  "Code" shall mean the Internal Revenue Code of 1986, as
amended, and the regulations promulgated thereunder, including any successor
legislation.

                  "Cognizant" shall mean Cognizant Corporation, a
Delaware corporation.

                  "Cognizant and ACNielsen Nonqualified Plan Participants" shall
have the meaning as set forth in Section 4.2 of this Agreement.

                  "Cognizant Bifurcated Savings Plan Employees" shall have the
meaning set forth in Section 3.2(a) of this Agreement.

                  "Cognizant Common Shares" shall have the meaning set
forth in the recitals hereto.

                  "Cognizant Employees" shall mean persons who, immediately
after the Effective Time, are employed by the Cognizant Group (including persons
who are absent from work by reason of layoff or leave of absence and inactive
employees treated as such by agreement therewith).

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                                                                               4


                  "Cognizant Group" shall mean Cognizant and each Business
Entity which is contemplated to remain or become a Subsidiary of Cognizant
pursuant to the Distribution Agreement.

                  "Cognizant Lump-Sum Savings Plan Employees" shall have the
meaning set forth in Section 3.2(a) of this Agreement.

                  "Cognizant Replacement Plans" shall mean the replacement plans
(including, without limitation, the replacement plan for certain IMS employees)
to be adopted by Cognizant pursuant to Section 6.1(b) of this Agreement.

                  "Cognizant Retirement Eligible Employees" shall have the
meaning set forth in Section 5.6 of this Agreement.

                  "Cognizant Retirement Plan" shall mean the defined benefit
plan to be adopted by Cognizant pursuant to Section 2.2(a) of this Agreement.

                  "Cognizant Retirement Plan Effective Date" shall have the
meaning set forth in Section 2.2(a) of this Agreement.

                  "Cognizant Retirement Plan Segregation Ratio" shall equal a
fraction, the numerator of which is the Present Value of the accrued vested and
nonvested benefits (as defined in ERISA Section 4044(a)(1)-(6)) of the Cognizant
Transferred Retirement Plan Employees under the D&B Retirement Plan at the
Effective Time, and the denominator of which is the Present Value of the accrued
vested and nonvested benefits (as defined in ERISA Section 4044(a)(1)-(6)) of
the D&B Pre-Distribution Employees under the D&B Retirement Plan at the
Effective Time.

                  "Cognizant Retirement Plan Transfer Date" shall have the
meaning set forth in Section 2.2(b) of this Agreement.

                  "Cognizant Savings Plan" shall mean the defined contribution
plan to be adopted by Cognizant pursuant to Section 3.2(a) of this Agreement.

                  "Cognizant Savings Plan Transfer Date" shall have the meaning
set forth in Section 3.2(b) of this Agreement.

                  "Cognizant Transferred Retirement Plan Employees" shall have
the meaning set forth in Section 2.2(a) of this Agreement.

                  "Cognizant Transferred Savings Plan Employees" shall have the
meaning set forth in Section 3.2 of this Agreement.

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                                                                               5


                  "Conveyancing and Assumption Instruments" shall mean,
collectively, the various agreements, instruments and other documents heretofore
entered into and to be entered into to effect the transfer of Assets and the
assumption of Liabilities in the manner contemplated by the Distribution
Agreement, or otherwise arising out of or relating to the transactions
contemplated in the Distribution Agreement.

                  "D&B" shall mean The Dun & Bradstreet Corporation, a Delaware
corporation.

                  "D&B Career Transition Plan" shall mean The Dun &
Bradstreet Career Transition Plan.

                  "D&B Committee" shall mean the Executive Compensation and
Stock Option Committee of the Board of Directors of D&B.

                  "D&B Common Stock" shall have the meaning set forth in
the recitals hereto.

                  "D&B Disabled Employees" shall mean all D&B Pre-Distribution
Employees who are receiving benefits under the D&B Long-Term Disability Plan as
of the Effective Time.

                  "D&B Group" shall mean D&B and each Business Entity (other
than any member of the Cognizant Group or the ACNielsen Group) that is a
Subsidiary of D&B.

                  "D&B Long-Term Disability Plan" shall mean The Dun &
Bradstreet Corporation Long Term Disability Plan or any other long-term
disability plan sponsored by D&B or any Subsidiary of D&B prior to the Effective
Time.

                  "D&B LSARs" shall have the meaning set forth in Section 6.2 of
this Agreement.

                  "D&B Nonqualified Plans" shall have the meaning as set forth
in Section 4.1 of this Agreement.

                  "D&B Pension BEP" shall mean the Pension Benefit Equalization
Plan of The Dun & Bradstreet Corporation, as amended effective December 21, 
1994.

                  "D&B Pension BEP Trust" shall mean the trust established in
connection with the D&B Pension BEP and made as of December 15, 1995.

                  "D&B Post-Distribution Employees" shall mean persons who,
immediately after the Effective Time, are employed by the D&B Group (including
persons who are absent from work by reason of layoff or leave of absence and
inactive employees treated as such by agreement therewith).

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                                                                               6


                  "D&B Pre-Distribution Employees" shall mean persons who, at
any time prior to the Effective Time, were employed by D&B or its Subsidiaries.

                  "D&B Retirees" shall mean persons who (i) were D&B
Pre-Distribution Employees, (ii) terminated employment from D&B prior to the
Effective Time and (iii) are neither Cognizant Employees nor ACNielsen Employees
immediately after the Effective Time.

                  "D&B Retirement Plan" shall mean the Master Retirement Plan of
The Dun & Bradstreet Corporation, as amended and restated effective January 1,
1994, with certain earlier effective dates.

                  "D&B Savings BEP" shall mean the Profit Participation
Benefit Equalization Plan of The Dun & Bradstreet Corporation, as amended and
restated effective January 1, 1995.

                  "D&B Savings Plan" shall mean the Profit Participation Plan of
The Dun & Bradstreet Corporation, as in effect on January 1, 1994, with certain
earlier effective dates.

                  "D&B Stock Option" shall have the meaning set forth in Section
6.1 of this Agreement.

                  "D&B Stock Option Plans" shall mean (i) the 1982 Key Employees
Stock Option Plan for The Dun & Bradstreet Corporation and Subsidiaries and (ii)
the 1991 Key Employees Stock Option Plan for The Dun & Bradstreet Corporation
and Subsidiaries.

                  "D&B Supplemental EBP" shall mean the Supplemental Executive
Benefit Plan of The Dun & Bradstreet Corporation, as amended effective December
21, 1994.

                  "D&B Supplemental EBP Trust" shall mean the trust established
in connection with the D&B Supplemental EBP and made as of December 15, 1995.

                  "Daily Average Trading Price" of a given stock on a given day
shall mean the average of the high and low trading prices for such stock on such
date.

                  "Data Services Agreements" shall mean the Data Services
Agreements to be entered into by D&B, Cognizant and ACNielsen.

                  "Distribution" shall mean the distribution on the Distribution
Date to holders of record of shares of D&B Common Stock as of the Distribution
Record Date of (i) the Cognizant Common Shares owned by D&B on the basis of one
Cognizant Common Share for each outstanding share of D&B Common Stock and (ii)
the ACNielsen Common Shares owned by D&B on the basis of one share of ACNielsen
Common Share for each three outstanding shares of D&B Common Stock.

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                                                                               7


                  "Distribution Agreement" shall mean the Distribution Agreement
among D&B, Cognizant and ACNielsen.

                  "Distribution Date" shall mean such date as may hereafter be
determined by D&B's Board of Directors as the date as of which the Distribution
shall be effected.

                  "Distribution Record Date" shall mean such date as may
hereafter be determined by D&B's Board of Directors as the record date for the
Distribution.

                  "Effective Time" shall mean 12:01 a.m., New York time, on the
Distribution Date.

                  "Employee Benefit Dispute" shall include any controversy,
dispute or claim 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 transactions contemplated hereby, including, without limitation, any
claim based on contract, tort, statute or constitution.

                  "Employee Benefit Litigation Liability" shall mean, with
respect to a Business Entity, a Liability relating to a controversy, dispute or
claim arising out of, in connection with or in relation to the interpretation,
performance, nonperformance, validity or breach of an Employee Benefit Plan of
such Business Entity or otherwise arising out of, or in any way related to such
Employee Benefit Plan, including, without limitation, any claim based on
contract, tort, statute or constitution.

                  "Employee Benefit Plans" shall mean, with respect to a
Business Entity, all "employee benefit plans" (within the meaning of Section
3(3) of ERISA), "multiemployer plans" (within the meaning of Section 3(37) of
ERISA), retirement, pension, savings, profit-sharing, welfare, stock purchase,
stock option, equitybased, severance, employment, change-in-control, fringe
benefit, collective bargaining, bonus, incentive, deferred compensation and all
other employee benefit plans, agreements, programs, policies or other
arrangements (including any funding mechanisms therefor), whether or not subject
to ERISA, whether formal or informal, oral or written, legally binding or not,
under which (i) any past, present or future employee of the Business Entity or
its Subsidiaries has a right to benefits and (ii) the Business Entity or its
Subsidiaries has any Liability.

                  "Employee Benefit Records" shall mean all agreements,
documents, books, records or files relating to the Employee Benefit Plans of
D&B, Cognizant and ACNielsen.

                  "Employee Benefit Welfare Plans" shall mean, with respect to a
Business Entity, all Employee Benefit Plans that are "welfare plans" within the
meaning of Section 3(1) of ERISA.

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                                                                               8


                  "ERISA" shall mean the Employee Retirement Income Security Act
of 1974, as amended, and the regulations promulgated thereunder, including any
successor legislation.

                  "ESOP" shall mean an "employee stock ownership plan" within
the meaning of Section 4975(e)(7) of the Code.

                  "FSA Coverage Period" shall have the meaning set forth in
Section 5.4 of this Agreement.

                  "IMS" shall mean I.M.S. International, Inc., a Delaware
corporation.

                  "Information Statement" shall mean the Information Statement
sent to the holders of shares of D&B Common Stock in connection with the
Distribution, including any amendment or supplement thereto.

                  "Intellectual Property Agreement" shall mean the intellectual
property and licensing agreement among D&B, Cognizant and ACNielsen.

                  "Liabilities" shall mean any and all losses, claims, charges,
debts, demands, actions, causes of action, suits, damages, obligations,
payments, costs and expenses, sums of money, accounts, reckonings, bonds,
specialties, indemnities and similar obligations, exonerations, covenants,
contracts, controversies, agreements, promises, doings, omissions, variances,
guarantees, make whole agreements and similar obligations, and other
liabilities, including all contractual obligations, whether absolute or
contingent, matured or unmatured, liquidated or unliquidated, accrued or
unaccrued, known or unknown, whenever arising, and including those arising under
any law, rule, regulation, Action, threatened or contemplated Action (including
the costs and expenses of demands, assessments, judgments, settlements and
compromises relating thereto and attorneys' fees and any and all costs and
expenses (including allocated costs of in-house counsel and other personnel),
whatsoever reasonably incurred in investigating, preparing or defending against
any such Actions or threatened or contemplated Actions), order or consent decree
of any governmental or other regulatory or administrative agency, body or
commission or any award of any arbitrator or mediator of any kind, and those
arising under any contract, commitment or undertaking, including those arising
under this Agreement, the Distribution Agreement or any Ancillary Agreement, in
each case, whether or not recorded or reflected or required to be recorded or
reflected on the books and records or financial statements of any person.

                  "Participant Election Period" shall mean the period during
which the elections described in Sections 3.2 and 3.3 are permitted (such
period, in no event, to be less than 30 days 

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                                                                               9


following notice thereof to persons who are eligible to make the election).

                  "PBGC" shall mean the Pension Benefit Guaranty Corporation or
any successor entity thereto.

                  "PBGC Assumptions" shall mean the actuarial assumptions
set forth in 29 C.F.R. Part 2619, et seq.

                  "person" shall mean any natural person, corporation, business
trust, joint venture, association, company, partnership or government, or any
agency or political subdivision thereof.

                  "Present Value" shall mean the single sum value of a series of
future payments, determined utilizing PBGC Assumptions in effect as of the
measurement date.

                  "Service" shall mean the Internal Revenue Service or
any successor entity thereto.

                  "Shared Transaction Services Agreements" shall mean the Shared
Transaction Services Agreements among D&B, Cognizant and ACNielsen.

                  "Subsidiary" shall mean any corporation, partnership or other
entity of which another entity (i) owns, directly or indirectly, ownership
interests sufficient to elect a majority of the Board of Directors (or persons
performing similar functions) (irrespective of whether at the time any other
class or classes of ownership interests of such corporation, partnership or
other entity shall or might have such voting power upon the occurrence of any
contingency) or (ii) is a general partner or an entity performing similar
functions (e.g., a trustee).

                  "Tax Allocation Agreement" shall mean the Tax Allocation
Agreement among D&B, Cognizant and ACNielsen.

                  "Transition Services Agreement" shall mean the Transition
Services Agreement among D&B, Cognizant and ACNielsen.

                                   ARTICLE II
                              DEFINED BENEFIT PLANS

                  SECTION 2.1. D&B Retirement Plan. From and after the Effective
Time, D&B shall continue to sponsor the D&B Retirement Plan for the benefit of
D&B Post-Distribution Employees, D&B Retirees and D&B Disabled Employees. Active
participation of Cognizant Employees and ACNielsen Employees in the D&B
Retirement Plan shall cease immediately after the Effective Time.

                  SECTION 2.2. Cognizant Retirement Plan. (a) As soon as
practicable after the Effective Time, but not later than the first day of the
fourth calendar month that begins after the 

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                                                                              10


Effective Time (herein referred to as the "Cognizant Retirement Plan Effective
Date"), Cognizant shall establish the Cognizant Retirement Plan for the benefit
of Cognizant Employees who were participants in the D&B Retirement Plan
immediately prior to the Effective Time (the "Cognizant Transferred Retirement
Plan Employees"). As soon as practicable after the Effective Time, D&B shall
cause the trustee of the D&B Retirement Plan to segregate the assets of the D&B
Retirement Plan allocable to Cognizant Transferred Retirement Plan Employees in
an amount equal to the sum of (i) and (ii), as follows:

       (i)    the amount allocable to Cognizant Transferred Retirement Plan
              Employees under ERISA Section 4044 as of the Effective Time,
              determined using PBGC Assumptions; and

       (ii)   the excess (if any) of the fair market value of assets of the D&B
              Retirement Plan over the Present Value of the vested and nonvested
              benefits accrued thereunder for all the D&B Pre-Distribution
              Employees as of the Effective Time, multiplied by the Cognizant
              Retirement Plan Segregation Ratio.

                  (b) As soon as practicable after the Effective Time, the
assets allocable to the Cognizant Transferred Retirement Plan Employees shall be
transferred to a separate trust established under the Cognizant Retirement Plan
(such date herein referred to as the "Cognizant Retirement Plan Transfer Date");
provided, however, that in no event shall such transfer take place until (i) D&B
has made all required filings and submissions to the appropriate governmental
agencies and (ii) Cognizant has furnished to D&B (A) a favorable determination
letter that the Cognizant Retirement Plan is qualified under Section 401(a) of
the Code or (B) an opinion letter from Simpson Thacher & Bartlett to the effect
that the Cognizant Retirement Plan is qualified under Section 401(a) of the
Code. The value of such assets to be transferred shall equal the value of
segregated assets determined under Section 2.2(a) of this Agreement, adjusted as
follows:

       (i)    reduced by the amount of benefit payments made under the D&B
              Retirement Plan with respect to Cognizant Transferred Retirement
              Plan Employees from the Effective Time to the Cognizant Retirement
              Plan Transfer Date; and

       (ii)   increased (or decreased) by the share of the net investment income
              (or loss) from the Effective Time to the Cognizant Retirement Plan
              Transfer Date attributable to the value of such segregated assets.

                  (c) Unless otherwise agreed to by D&B and Cognizant (as well
as ACNielsen if it has assets in the D&B Retirement Plan on the Cognizant
Retirement Plan Transfer Date), the form of the assets to be transferred shall
consist of an undivided percentage 

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                                                                              11


interest in each asset that is held by the D&B Retirement Plan on the Cognizant
Retirement Plan Transfer Date, such undivided percentage interest being equal to
the value of assets allocable to the Cognizant Transferred Retirement Plan
Employees, divided by the fair market value of plan assets.

                  (d) Prior to the Cognizant Retirement Plan Transfer Date, all
benefit payments to Cognizant Transferred Retirement Plan Employees shall be
made from the D&B Retirement Plan.

                  SECTION 2.3 ACNielsen Retirement Plan. (a) As soon as
practicable after the Effective Time, but not later than the first day of the
fourth calendar month that begins after the Effective Time (herein referred to
as the "ACNielsen Retirement Plan Effective Date"), ACNielsen shall establish
the ACNielsen Retirement Plan for the benefit of ACNielsen Employees who were
participants in the D&B Retirement Plan immediately prior to the Effective Time
(the "ACNielsen Transferred Retirement Plan Employees"). As soon as practicable
after the Effective Time, D&B shall cause the trustee of the D&B Retirement Plan
to segregate the assets of the D&B Retirement Plan allocable to ACNielsen
Transferred Retirement Plan Employees in an amount equal to the sum of (i) and
(ii), as follows:

       (i)    the amount allocable to ACNielsen Transferred Retirement Plan
              Employees under ERISA Section 4044 as of the Effective Time,
              determined using PBGC Assumptions; and

       (ii)   the excess (if any) of the fair market value of assets of the D&B
              Retirement Plan over the Present Value of the vested and nonvested
              benefits accrued thereunder for all the D&B Pre-Distribution
              Employees as of the Effective Time, multiplied by the ACNielsen
              Retirement Plan Segregation Ratio.

                  (b) As soon as practicable after the Effective Time, the
assets allocable to the ACNielsen Transferred Retirement Plan Employees shall be
transferred to a separate trust established under the ACNielsen Retirement Plan
(such date herein referred to as the "ACNielsen Retirement Plan Transfer Date");
provided, however, that in no event shall such transfer take place until (i) D&B
has made all required filings and submissions to the appropriate governmental
agencies and (ii) ACNielsen has furnished to D&B (A) a favorable determination
letter that the ACNielsen Retirement Plan is qualified under Section 401(a) of
the Code or (B) an opinion letter from Simpson Thacher & Bartlett to the effect
that the ACNielsen Retirement Plan is qualified under Section 401(a) of the
Code. The value of such assets to be transferred shall equal the value of
segregated assets determined under Section 2.3(a) of this Agreement, adjusted as
follows:

       (i)    reduced by the amount of benefit payments made under the D&B
              Retirement Plan with respect to ACNielsen 

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                                                                              12


              Transferred Retirement Plan Employees from the Effective Time to
              the ACNielsen Retirement Plan Transfer Date; and

       (ii)   increased (or decreased) by the share of the net investment income
              (or loss) from the Effective Time to the ACNielsen Retirement Plan
              Transfer Date attributable to the value of such segregated assets.

                  (c) Unless otherwise agreed to by D&B and ACNielsen (as well
as Cognizant if it has assets in the D&B Retirement Plan on the ACNielsen
Retirement Plan Transfer Date), the form of the assets to be transferred shall
consist of an undivided percentage interest in each asset that is held by the
D&B Retirement Plan on the ACNielsen Retirement Plan Transfer Date, such
undivided percentage interest being equal to the value of assets allocable to
the ACNielsen Transferred Retirement Plan Employees, divided by the fair market
value of plan assets.

                  (d) Prior to the ACNielsen Retirement Plan Transfer Date, all
benefit payments to ACNielsen Transferred Retirement Plan Employees shall be
made from the D&B Retirement Plan.

                  SECTION 2.4. Allocation of Liabilities. The Cognizant Group
shall assume all Liabilities relating to the participation of Cognizant
Transferred Retirement Plan Employees in the D&B Retirement Plan and in the
Cognizant Retirement Plan. The ACNielsen Group shall assume all Liabilities
relating to the participation of ACNielsen Transferred Retirement Plan Employees
in the D&B Retirement Plan and in the ACNielsen Retirement Plan. The D&B Group
shall retain all other Liabilities relating to the D&B Retirement Plan.

                                   ARTICLE III
                           DEFINED CONTRIBUTION PLANS

                  SECTION 3.1. D&B Savings Plan. From and after the Effective
Time, D&B shall continue to sponsor the D&B Savings Plan for the benefit of D&B
Post-Distribution Employees, D&B Retirees, D&B Disabled Employees, Cognizant
Bifurcated Savings Plan Employees (as defined in Section 3.2(a) below) and
ACNielsen Bifurcated Savings Plan Employees (as defined in Section 3.3(a)
below). Active participation of Cognizant Employees and ACNielsen Employees in
the D&B Savings Plan shall cease immediately after the Effective Time.

                  SECTION 3.2. Cognizant Savings Plan. (a) As of the Effective
Time, Cognizant shall adopt the Cognizant Savings Plan for the benefit of
Cognizant Employees who were participants in the D&B Savings Plan immediately
prior to the Effective Time. Prior to the Effective Time, Cognizant Employees
shall be given the right to elect one of the following options with respect to
their D&B Savings Plan account balances: (i) Cognizant Employees 

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                                                                              13


may keep their balances in the D&B Savings Plan (such employees being known as
"Cognizant Bifurcated Savings Plan Employees"); (ii) Cognizant Employees may
receive a lump-sum payment (in cash and/or stock) of their balances (such
employees being known as "Cognizant Lump-Sum Savings Plan Employees") or (iii)
Cognizant Employees may transfer their balances to the Cognizant Savings Plan
(such employees being known as "Cognizant Transferred Savings Plan Employees").
If a Cognizant Employee fails to elect any of the foregoing options prior to the
end of the Participant Election Period, (i) his or her balance shall remain in
the D&B Savings Plan, and (ii) such employee shall be treated as a Cognizant
Bifurcated Savings Plan Employee.

                  (b) Prior to the date on which the transfer of assets and
liabilities to the Cognizant Savings Plan shall occur (the "Cognizant Savings
Plan Transfer Date"), which date shall occur as promptly as practicable
following the Participant Election Period, (i) D&B shall (A) cause the trustee
of the D&B Savings Plan to segregate, in accordance with the spinoff provisions
set forth under Section 414(l) of the Code, the assets of the D&B Savings Plan
representing the full account balances of Cognizant Transferred Savings Plan
Employees for all periods of participation through the Effective Time
(including, as applicable, all contributions and all earnings attributable
thereto); (B) make all required filings and submissions to the appropriate
governmental agencies; and (C) make all required amendments to the D&B Savings
Plan and related trust agreement necessary to provide for the segregation and
transfer of assets described in this Section 3.2, and (ii) Cognizant shall
furnish to D&B (A) a favorable determination letter that the Cognizant Savings
Plan is qualified under Section 401(a) of the Code or (B) an opinion letter from
Simpson Thacher & Bartlett to the effect that the Cognizant Savings Plan is
qualified under Section 401(a) of the Code.

                  (c) On the Cognizant Savings Plan Transfer Date, D&B shall
cause the trustee of the D&B Savings Plan to transfer to the trustee of the
Cognizant Savings Plan the full account balances (inclusive of loans) of
Cognizant Transferred Savings Plan Employees in kind based on those investment
funds in which such account balances are then invested (including, but not
limited to, the pooled stock fund); provided, however, that loans to Cognizant
Transferred Savings Plan Employees shall be transferred in the form of notes and
amounts in the D&B stock fund shall be transferred in the form of cash. In
consideration of the segregation and transfer of assets described herein, the
Cognizant Savings Plan shall, as of the Cognizant Savings Plan Transfer Date,
assume all Liabilities attributable to such assets.

                  (d) Notwithstanding anything in this Agreement to the
contrary, (i) a Cognizant Employee may not elect to be treated as a Cognizant
Bifurcated Savings Plan Employee if his or her account balance in the D&B
Savings Plan is $3,500 or less (in 

<PAGE>
                                                                              14


which case such Cognizant Employee shall be treated as a Cognizant Lump-Sum
Savings Plan Employee) and (ii) a Cognizant Bifurcated Savings Plan Employee
may, prior to the second anniversary of the Distribution Date, elect to receive
a distribution of his or her account balance in the D&B Savings Plan.

                  SECTION 3.3. ACNielsen Savings Plan. (a) As of the Effective
Time, ACNielsen shall adopt the ACNielsen Savings Plan for the benefit of
ACNielsen Employees who were participants in the D&B Savings Plan immediately
prior to the Effective Time. Prior to the Effective Time, ACNielsen Employees
shall be given the right to elect one of the following options with respect to
their D&B Savings Plan account balances: (i) ACNielsen Employees may keep their
balances in the D&B Savings Plan (such employees being known as "ACNielsen
Bifurcated Savings Plan Employees"); (ii) ACNielsen Employees may receive a
lump-sum payment (in cash and/or stock) of their balances (such employees being
known as "ACNielsen Lump-Sum Savings Plan Employees") or (iii) ACNielsen
Employees may transfer their balances to the ACNielsen Savings Plan (such
employees being known as "ACNielsen Transferred Savings Plan Employees"). If an
ACNielsen Employee fails to elect any of the foregoing options prior to the end
of the Participant Election Period, (i) his or her balance shall remain in the
D&B Savings Plan, and (ii) such employee shall be treated as a ACNielsen
Bifurcated Savings Plan Employee.

                  (b) Prior to the date on which the transfer of assets and
liabilities to the ACNielsen Savings Plan shall occur (the "ACNielsen Savings
Plan Transfer Date"), which date shall occur as promptly as practicable
following the Participant Election Period, (i) D&B shall (A) cause the trustee
of the D&B Savings Plan to segregate, in accordance with the spinoff provisions
set forth under Section 414(l) of the Code, the assets of the D&B Savings Plan
representing the full account balances of ACNielsen Transferred Savings Plan
Employees for all periods of participation through the Effective Time
(including, as applicable, all contributions and all earnings attributable
thereto); (B) make all required filings and submissions to the appropriate
governmental agencies; and (C) make all required amendments to the D&B Savings
Plan and related trust agreement necessary to provide for the segregation and
transfer of assets described in this Section 3.3, and (ii) ACNielsen shall
furnish to D&B (A) a favorable determination letter that the ACNielsen Savings
Plan is qualified under Section 401(a) of the Code or (B) an opinion letter from
Simpson Thacher & Bartlett to the effect that the ACNielsen Savings Plan is
qualified under Section 401(a) of the Code.

                  (c) On the ACNielsen Savings Plan Transfer Date, D&B shall
cause the trustee of the D&B Savings Plan to transfer to the trustee of the
ACNielsen Savings Plan the full account balances (inclusive of loans) of
ACNielsen Transferred Savings Plan Employees in kind based on those investment
funds in which 

<PAGE>
                                                                              15


such account balances are then invested (including, but not limited to, the
pooled stock fund); provided, however, that loans to ACNielsen Transferred
Savings Plan Employees shall be transferred in the form of notes and amounts in
the D&B stock fund shall be transferred in the form of cash. In consideration of
the segregation and transfer of assets described herein, the ACNielsen Savings
Plan shall, as of the ACNielsen Savings Plan Transfer Date, assume all
Liabilities attributable to such assets.

                  (d) Notwithstanding anything in this Agreement to the
contrary, (i) an ACNielsen employee may not elect to be treated as an ACNielsen
Bifurcated Savings Plan Employee if his or her account balance in the D&B
Savings Plan is $3,500 or less (in which case such ACNielsen Employee shall be
treated as an ACNielsen Lump-Sum Savings Plan Employee) and (ii) an ACNielsen
Bifurcated Savings Plan Employee may, prior to the second anniversary of the
Distribution Date, elect to receive a distribution of his or her account balance
in the D&B Savings Plan.

                  SECTION 3.4. Vesting. As of the Effective Time, the account
balances of Cognizant Employees and ACNielsen Employees in the D&B Savings Plan
shall fully vest.

                  SECTION 3.5. Outstanding Loans. During their employment with
Cognizant or ACNielsen (as the case may be), Cognizant Transferred Savings Plan
Employees and ACNielsen Transferred Savings Plan Employees who have outstanding
loans originally made from the D&B Savings Plan shall be permitted to repay such
loans by way of regular deductions from their paychecks, and, prior to the
Cognizant Savings Plan Transfer Date or ACNielsen Savings Plan Transfer Date (as
the case may be), D&B, Cognizant or ACNielsen (as the case may be) shall cause
all such deductions to be forwarded to the D&B Savings Plan as promptly as
practicable. No such deductions by Cognizant or ACNielsen shall be made in
respect of Cognizant Bifurcated Savings Plan Employees and ACNielsen Bifurcated
Savings Plan Employees who have outstanding loans from the D&B Savings Plan, and
all such employees shall be required to repay their loans directly to the D&B
Savings Plan in accordance with the existing terms thereof. Notwithstanding the
foregoing, prior to the end of the Participant Election Period, and for such
period thereafter as may be reasonably determined by D&B, Cognizant Employees
and ACNielsen Employees who have outstanding loans from the D&B Savings Plan
shall be permitted to repay such loans by way of regular deductions from their
paychecks.

                  SECTION 3.6. Employer Stock Fund. Participants in the D&B
Savings Plan who, immediately prior to the Effective Time, have balances in the
D&B Common Stock fund shall have such balances converted, as of the Effective
Time, to units in a pooled stock fund consisting of D&B Common Stock, Cognizant
Common Shares and ACNielsen Common Shares. The initial ratio of 

<PAGE>
                                                                              16


stock in the pooled stock fund shall be one share of D&B Common Stock to one
share of Cognizant Common Shares to 1/3 share of ACNielsen Common Shares. The
percentage interest of each participant in the pooled stock fund as of the
Effective Time shall equal such participant's percentage interest in the D&B
Common Stock fund immediately prior to the Effective Time. Each of the Cognizant
Savings Plan and ACNielsen Savings Plan shall maintain a pooled stock fund, to
which the pooled stock fund assets of Cognizant Transferred Savings Plan
Employees and ACNielsen Transferred Savings Plan Employees in the D&B Savings
Plan shall be transferred on the Cognizant Savings Plan Transfer Date and the
ACNielsen Savings Plan Transfer Date (as the case may be). From and after the
Effective Time, a participant may liquidate his or her units in the pooled stock
fund and invest the proceeds thereof in any other investment option available
under the applicable plan. A participant may not acquire additional units in the
pooled stock fund from or after the Effective Time.

                  SECTION 3.7. Matching Contributions. D&B shall make its
regular monthly matching contributions to the D&B Savings Plan accounts of
Cognizant Employees and ACNielsen Employees for all periods of service on or
prior to the Effective Time.

                  SECTION 3.8. Allocation of Liabilities. The Cognizant Group
shall assume all Liabilities relating to the participation of (a) Cognizant
Transferred Savings Plan Employees in the D&B Savings Plan and in the Cognizant
Savings Plan and (b) Cognizant Bifurcated Savings Plan Employees in the
Cognizant Savings Plan. The ACNielsen Group shall assume all Liabilities
relating to the participation of (a) ACNielsen Employees in the D&B Savings Plan
and in the ACNielsen Savings Plan and (b) ACNielsen Bifurcated Savings Plan
Employees in the ACNielsen Savings Plan. The D&B Group shall retain all other
Liabilities relating to the D&B Savings Plan.

                                   ARTICLE IV
                               NONQUALIFIED PLANS

                  SECTION 4.1. D&B Nonqualified Plans. From and after the
Effective Time, D&B shall continue to sponsor the D&B Supplemental EBP, the D&B
Supplemental EBP Trust, the D&B Pension BEP, the D&B Pension BEP Trust and the
D&B Savings BEP (collectively, the "D&B Nonqualified Plans") for the benefit of
persons who, prior to the Effective Time, were participants thereunder;
provided, however, that, with respect to Cognizant Employees and ACNielsen
Employees, D&B shall retain only those Liabilities for benefits under the D&B
Nonqualified Plans that, prior to the Effective Time, were accrued and to which
such participants had earned vested rights thereunder.

                  SECTION 4.2. Service Credit. Cognizant Employees and ACNielsen
Employees who were participants in the D&B Nonqualified 

<PAGE>
                                                                              17


Plans immediately prior to the Effective Time (the "Cognizant and ACNielsen
Nonqualified Plan Participants") shall continue to receive service credit under
such plans for their service with the Cognizant Group or the ACNielsen Group (as
the case may be) from and after the Effective Time, but solely for purposes of
satisfying the one-year waiting requirement for a valid election under the D&B
Nonqualified Plans.

                  SECTION 4.3. Consent to Termination. Solely with respect to
determining the level of benefits payable under the D&B Nonqualified Plans,
Cognizant and ACNielsen shall have the authority to consent to the termination
of employment prior to age 60 of a Cognizant or ACNielsen Nonqualified Plan
Participant from the Cognizant Group or the ACNielsen Group (as the case may
be).

                  SECTION 4.4.  Termination of Employment.  Benefits
under the D&B Nonqualified Plans shall not become payable to a
Cognizant or ACNielsen Nonqualified Plan Participant until such
participant terminates employment from the Cognizant Group or the ACNielsen 
Group (as the case may be).

                  SECTION 4.5. Noncompetition. Solely with respect to the
noncompetition clauses of the D&B Nonqualified Plans, D&B hereby consents to the
employment of the Cognizant and ACNielsen Nonqualified Plan Participants by the
Cognizant Group or the ACNielsen Group (as the case may be) after the Effective
Time, whether or not such employment would otherwise trigger such noncompetition
clauses.

                  SECTION 4.6. Distributions; Lump-Sum Elections. Cognizant and
ACNielsen Nonqualified Plan Participants who participated in the D&B Savings BEP
immediately prior to the Effective Time shall receive a distribution thereunder,
based on their notional elective deferrals through the Effective Time, at the
time distributions are otherwise made under such plan.

                  SECTION 4.7. Guarantees; Subrogation. The Cognizant Group
agrees that, in the event the D&B Group is unable to satisfy its obligations in
respect of the benefits of any Cognizant Employee that have accrued under the
D&B Nonqualified Plans prior to the Effective Time, the Cognizant Group shall
make payment when due with respect to such obligations of the D&B Group. The
ACNielsen Group agrees that, in the event the D&B Group is unable to satisfy its
obligations in respect of the benefits of any ACNielsen Employee that have
accrued under the D&B Nonqualified Plans prior to the Effective Time, the
ACNielsen Group shall make payment when due with respect to such obligations of
the D&B Group. In the event that the Cognizant Group or the ACNielsen Group is
required to make any payment pursuant to this Section 4.7, the Cognizant Group
or the ACNielsen Group (as the case may be) shall have full rights of
subrogation against the D&B Group.

<PAGE>
                                                                              18


                  SECTION 4.8. Third-Party Beneficiaries. It is the intention of
the parties to this Agreement that the provisions of Section 4.7 shall be
enforceable by (a) the Cognizant and ACNielsen Nonqualified Plan Participants
and (b) their respective surviving beneficiaries.

                                    ARTICLE V
                                  WELFARE PLANS

                  SECTION 5.1. Employee Benefit Welfare Plans. Except as
provided in Section 5.4 and Section 5.5 below, from and after the Effective
Time, D&B shall sponsor its Employee Benefit Welfare Plans solely for the
benefit of D&B Post-Distribution Employees, D&B Retirees and D&B Disabled
Employees. From and after the Effective Time, Cognizant shall sponsor its
Employee Benefit Welfare Plans solely for the benefit of Cognizant Employees.
From and after the Effective Time, ACNielsen shall sponsor its Employee Benefit
Welfare Plans solely for the benefit of ACNielsen Employees. Notwithstanding the
foregoing, none of D&B, Cognizant or ACNielsen shall have any obligation to
sponsor any Employee Benefit Welfare Plan from or after the Effective Time.

                  SECTION 5.2. Pre-Existing Conditions; Dollar Limits. With
respect to any medical plan that may be sponsored by Cognizant or ACNielsen
after the Effective Time, Cognizant and ACNielsen (a) shall cause there to be
waived any pre-existing condition limitations and (b) shall give effect, in
determining any deductible and maximum out-of-pocket limitations, to claims
incurred, and amounts paid by, and amounts reimbursed to, (in each case during
1996 prior to the Effective Time) ACNielsen Employees and Cognizant Employees
under similar plans maintained by D&B (or any Affiliate thereof) for their
benefit immediately prior to the Effective Time.

                  SECTION 5.3. Severance Plans. The Cognizant Group shall retain
all Liabilities with respect to severance payments made or to be made to
employees of the Cognizant Group who terminated employment prior to the
Effective Time. The ACNielsen Group shall retain all Liabilities with respect to
severance payments made or to be made to employees of the ACNielsen Group who
terminated employment prior to the Effective Time. The D&B Group shall retain
all Liabilities with respect to severance payments made or to be made to all
other D&B Pre-Distribution Employees who terminated employment prior to the
Effective Time. For purposes of this Section 5.3, the term "severance payments"
shall include any welfare benefit coverage provided under severance plans.

                  SECTION 5.4. Flexible Spending Accounts. From the Effective
Time until December 31, 1996 (the "FSA Coverage Period"), D&B shall continue to
sponsor its flexible spending accounts for all D&B Pre-Distribution Employees;
provided, 

<PAGE>
                                                                              19


however, that Cognizant and ACNielsen shall cause all deductions from
participant paychecks to be forwarded to D&B as promptly as practicable.

                  SECTION 5.5. Allocation of Liabilities. (a) The D&B Group
shall retain responsibility for and continue to pay all expenses and benefits
relating to the D&B Employee Benefit Welfare Plans with respect to (i) claims
incurred prior to the Effective Time by D&B Pre-Distribution Employees and their
covered dependents and (ii) claims incurred from and after the Effective Time by
D&B Post-Distribution Employees, D&B Retirees and D&B Disabled Employees. The
Cognizant Group shall be responsible for and pay expenses and benefits relating
to all Employee Benefit Welfare Plan claims incurred by Cognizant Employees and
their covered dependents from and after the Effective Time. The ACNielsen Group
shall be responsible for and pay expenses and benefits relating to all Employee
Benefit Welfare Plan claims incurred by ACNielsen Employees and their covered
dependents from and after the Effective Time. For purposes of this paragraph, a
claim is deemed incurred when the services that are the subject of the claim are
performed; in the case of life insurance, when the death occurs; in the case of
long-term disability, when the disability occurs; and, in the case of a hospital
stay, when the employee first enters the hospital. Notwithstanding the
foregoing, claims incurred by any employee of a pre-Distribution Subsidiary of
D&B or their covered dependents under any welfare plan maintained by such
Subsidiary solely for the benefit of its employees and their dependents shall,
whether incurred prior to, on or after the Effective Time, be the sole
responsibility and liability of that Subsidiary.

                  (b) The Cognizant Group shall be responsible for all COBRA
coverage for any employee of the Cognizant Group and his or her covered
dependents who participated in a D&B Employee Benefit Welfare Plan and who had
or have a loss of health care coverage due to a qualifying event occurring prior
to the Effective Time. The ACNielsen Group shall be responsible for all COBRA
coverage for any employee of the ACNielsen Group and his or her covered
dependents who participated in a D&B Employee Benefit Welfare Plan and who had
or have a loss of health care coverage due to a qualifying event occurring prior
to the Effective Time. The D&B Group shall be responsible for all COBRA coverage
for any other D&B Pre-Distribution Employee and his or her covered dependents
who participated in a D&B Employee Benefit Welfare Plan and who had or have a
loss of health care coverage due to a qualifying event occurring prior to the
Effective Time. Notwithstanding the foregoing, a pre-Distribution Subsidiary of
D&B shall be responsible for all COBRA coverage for its former employees and
covered dependents who participated in a plan maintained solely for their
benefit whether the applicable event occurs prior to, on or after the Effective
Time. COBRA coverage to which a Cognizant Employee or ACNielsen Employee is
entitled as a result of a qualifying event occurring at or after the Effective
Time

<PAGE>
                                                                              20


shall be the responsibility of the Cognizant Group or the ACNielsen Group,
respectively.

                  SECTION 5.6. Retiree Welfare Plans. The Cognizant Group shall
be responsible for providing retiree welfare benefits to those D&B
Pre-Distribution Employees who are Cognizant Employees and who, immediately
prior to the Effective Time, are (i) eligible to retire and (ii) eligible to
elect such coverage under the D&B Employee Benefit Welfare Plans (but who do not
in fact elect such coverage) (the "Cognizant Retirement Eligible Employees");
provided, however, that in the event the Cognizant Group fails to provide to a
Cognizant Retirement Eligible Employee one or more components of retiree welfare
coverage (such components consisting of medical, dental and life benefits), the
D&B Group shall be responsible for the missing component(s), but only to the
same extent it provides such component(s) to its retirees from and after the
time when such Cognizant Retirement Eligible Employee retires or loses his or
her coverage. In the event the D&B Group must provide the benefits described
hereunder, it shall have full rights of reimbursement from the Cognizant Group.
The ACNielsen Group shall be responsible for providing retiree welfare benefits
to those D&B Pre-Distribution Employees who are ACNielsen Employees and who,
immediately prior to the Effective Time, are (i) eligible to retire and (ii)
eligible to elect such coverage under the D&B Employee Benefit Welfare Plans
(but who do not in fact elect such coverage) (the "ACNielsen Retirement Eligible
Employees"); provided, however, that in the event the ACNielsen Group fails to
provide to an ACNielsen Retirement Eligible Employee one or more components of
retiree welfare coverage (such components consisting of medical, dental and life
benefits), the D&B Group shall be responsible for the missing component(s), but
only to the same extent it provides such component(s) to its retirees from and
after the time when such ACNielsen Retirement Eligible Employee retires or loses
his or her coverage. In the event the D&B Group must provide the benefits
described hereunder, it shall have full rights of reimbursement from the
ACNielsen Group. Notwithstanding the provisions of Sections 10.2, 10.3 or 10.4
hereof, in the event any D&B Pre-Distribution Employee elects to retire on or
prior to the Effective Time and receive retiree welfare coverage under the D&B
Employee Welfare Benefit Plans, neither the Cognizant Group nor the ACNielsen
Group shall provide such employee with past service credit under their
respective Employee Benefit Plans, nor shall any assets and liabilities be
transferred in respect of such employee under Article II hereof, upon any
subsequent employment of such individual by the Cognizant Group or the ACNielsen
Group.

<PAGE>
                                                                              21


                                   ARTICLE VI
                               EQUITY-BASED PLANS

                  SECTION 6.1. D&B Stock Options. Stock options awarded under
the D&B Stock Option Plans ("D&B Stock Options") shall be treated as follows:

                  (a) D&B Retirees; D&B Disabled Employees; D&B
Post-Distribution Employees. From and after the Effective Time, each unexercised
D&B Stock Option held by D&B Post-Distribution Employees, D&B Retirees and D&B
Disabled Employees shall remain outstanding pursuant to the terms of the award
agreements and the D&B Stock Option Plans; provided, however, that from and
after such time, each unexercised D&B Stock Option shall be adjusted as follows:
(i) the exercise price of the adjusted stock option shall be determined by
multiplying the exercise price of the D&B Stock Option by a fraction, the
numerator of which is the average of the Daily Average Trading Prices of D&B
Common Stock for the five consecutive trading days starting on the first date on
which D&B Common Stock is traded ex-dividend, and the denominator of which is
the average of the Daily Average Trading Prices of D&B Common Stock for the five
consecutive trading days immediately preceding the first date on which D&B
Common Stock is traded exdividend and (ii) the number of shares of D&B Common
Stock covered by the adjusted stock option shall be determined by (A)
multiplying the number of shares of D&B Common Stock covered by the D&B Stock
Option by a fraction, the numerator of which is the average of the Daily Average
Trading Prices of D&B Common Stock for the five consecutive trading days
immediately preceding the first date on which D&B Common Stock is traded
ex-dividend, and the denominator of which is the average of the Daily Average
Trading Prices of D&B Common Stock for the five consecutive trading days
starting on the first date on which D&B Common Stock is traded ex-dividend and
(B) rounding down the result to a whole number of shares.

                  (b) Cognizant Employees. As of the Effective Time, (i) each
unexercised D&B Stock Option held by Cognizant Employees shall be cancelled and
(ii) such individuals shall receive replacement stock options awarded under the
Cognizant Replacement Plans, which shall be adopted by Cognizant prior to the
Effective Time. The exercise price of each replacement stock option shall be
determined by multiplying the exercise price of the cancelled D&B Stock Option
by a fraction, the numerator of which is the average of the Daily Average
Trading Prices of Cognizant Common Shares for the five consecutive trading days
starting on the first date on which Cognizant Common Shares are traded regular
way, and the denominator of which is the average of the Daily Average Trading
Prices of D&B Common Stock for the five consecutive trading days immediately
preceding the first date on which D&B Common Stock is traded ex-dividend. The
number of shares of Cognizant Common Shares covered by each replacement stock
option shall be determined by (i) multiplying the number of shares of D&B Common
Stock covered by the cancelled D&B Stock 

<PAGE>
                                                                              22


Option by a fraction, the numerator of which is the average of the Daily Average
Trading Prices of D&B Common Stock for the five consecutive trading days
immediately preceding the first date on which D&B Common Stock is traded
ex-dividend, and the denominator of which is the average of the Daily Average
Trading Prices of Cognizant Common Shares for the five consecutive trading days
starting on the first date on which Cognizant Common Shares are traded regular
way and (ii) rounding down the result to a whole number of shares. Except as
otherwise provided in the Cognizant Replacement Plans, all other terms of the
replacement stock options shall remain substantially identical to the terms of
the cancelled D&B Stock Options.

                  (c) ACNielsen Employees. As of the Effective Time, (i) each
unexercised D&B Stock Option held by ACNielsen Employees shall be cancelled and
(ii) such individuals shall receive replacement stock options awarded under the
ACNielsen Replacement Plan, which shall be adopted by ACNielsen prior to the
Effective Time. The exercise price of each replacement stock option shall be
determined by multiplying the exercise price of the cancelled D&B Stock Option
by a fraction, the numerator of which is the average of the Daily Average
Trading Prices of ACNielsen Common Shares for the five consecutive trading days
starting on the first date on which ACNielsen Common Shares are traded regular
way, and the denominator of which is the average of the Daily Average Trading
Prices of D&B Common Stock for the five consecutive trading days immediately
preceding the first date on which D&B Common Stock is traded ex-dividend. The
number of shares of ACNielsen Common Shares covered by each replacement stock
option shall be determined by multiplying the number of shares of D&B Common
Stock covered by the cancelled D&B Stock Option by a fraction, the numerator of
which is the average of the Daily Average Trading Prices of D&B Common Stock for
the five consecutive trading days immediately preceding the first date on which
D&B Common Stock is traded ex-dividend, and the denominator of which is the
average of the Daily Average Trading Prices of ACNielsen Common Shares for the
five consecutive trading days starting on the first date on which ACNielsen
Common Shares are traded regular way and (ii) rounding down the result to a
whole number of shares. Except as otherwise provided in the ACNielsen
Replacement Plan, all other terms of the replacement stock options shall remain
substantially identical to the terms of the cancelled D&B Stock Options.

                  SECTION 6.2. D&B LSARs. All limited stock appreciation rights
awarded under the D&B Stock Option Plans ("D&B LSARs") shall be adjusted or
substituted (as the case may be) in substantially the same manner as the D&B
Stock Options described in Section 6.1 above.

                  SECTION 6.3. Allocation of Liabilities. The Cognizant Group
shall assume all Liabilities with respect to awards granted to Cognizant
Employees pursuant to the Cognizant Replacement Option Plan. The ACNielsen Group
shall assume all Liabilities 

<PAGE>
                                                                              23


with respect to awards granted to ACNielsen Employees pursuant to the ACNielsen
Replacement Option Plan. The D&B Group shall retain all other Liabilities with
respect to awards granted pursuant to the D&B Stock Option Plans (including, but
not limited to, awards granted to D&B Post-Distribution Employees, D&B Retirees
and D&B Disabled Employees).

                                   ARTICLE VII
                         FOREIGN EMPLOYEE BENEFIT PLANS

                  SECTION 7.1. UK Pensions. D&B, Cognizant and ACNielsen shall
use their best efforts to ensure that the relevant employers may continue to
participate in The Dun & Bradstreet (UK) Pension Plan (the "D&B UK Plan") on the
terms and for the period following the Effective Time set forth in Schedule 7.1.
Cognizant and ACNielsen shall cause the relevant employers to establish or
nominate replacement pension arrangements which comply with the provisions of
Schedule 7.1 and which are capable of receiving a transfer of assets and
liabilities from the D&B UK Plan.

                                  ARTICLE VIII
                          EMPLOYEE STOCK OWNERSHIP PLAN

                  SECTION 8.1. Employee Stock Ownership Plan. After the
Effective Time, D&B, Cognizant and ACNielsen shall each establish an ESOP for
the benefit of their respective employees, but only to the extent required by
any letter ruling issued by the Service with respect to the Distribution.

                                   ARTICLE IX
                          OTHER EMPLOYEE BENEFIT ISSUES

                  SECTION 9.1. Employee Benefit Litigation Liabilities. Except
as otherwise expressly provided in this agreement or with respect to Articles
II, III and VI hereof, the D&B Group shall retain all Employee Benefit
Litigation Liabilities that are asserted by D&B Pre-Distribution Employees prior
to the Effective Time.

                  SECTION 9.2. Workers' Compensation. The D&B Group shall retain
all Liabilities relating to workers' compensation claims that were incurred (a)
prior to the Effective Time with respect to D&B Pre-Distribution Employees who
were employed by the D&B Group and (b) on and after the Effective Time with
respect to D&B Post-Distribution Employees. The Cognizant Group shall retain all
Liabilities relating to workers' compensation claims that were incurred (a)
prior to the Effective Time with respect to D&B Pre-Distribution Employees who
were employed by the Cognizant Group and (b) on and after the Effective Time
with respect to Cognizant Employees. The ACNielsen Group shall retain 

<PAGE>
                                                                              24


all Liabilities relating to workers' compensation claims that were incurred (a)
prior to the Effective Time with respect to D&B Pre-Distribution Employees who
were employed by the ACNielsen Group and (b) on and after the Effective Time
with respect to ACNielsen Employees. For purposes of this paragraph, a claim is
deemed incurred when the injury that is the subject of the claim occurs.

                                    ARTICLE X
                           BENEFIT PLAN PARTICIPATION

                  SECTION 10.1. D&B Plans. Except as specifically provided
herein, all Cognizant Employees and ACNielsen Employees shall cease
participation in all domestic D&B Employee Benefit Plans as of the Effective
Time.

                  SECTION 10.2. Cognizant Plans. Except as provided in Section
5.6 herein, (a) with respect to any Employee Benefit Plan sponsored by the
Cognizant Group after the Effective Time, the Cognizant Group shall cause to be
recognized (to the extent applicable) each Cognizant Employee's (i) past service
with the D&B Group to the extent recognized under similar plans maintained by
the D&B Group immediately prior to the Effective Time and (ii) accrued but
unused vacation time and sick days, and (b) any Cognizant Employee who
participated in a D&B Employee Benefit Plan immediately prior to the Effective
Time shall be entitled to immediate participation in a similar Employee Benefit
Plan sponsored by the Cognizant Group.

                  SECTION 10.3. ACNielsen Plans. Except as provided in Section
5.6 herein, (a) with respect to any Employee Benefit Plan sponsored by the
ACNielsen Group after the Effective Time, the ACNielsen Group shall cause to be
recognized (to the extent applicable) each ACNielsen Employee's (i) past service
with the D&B Group to the extent recognized under similar plans maintained by
the D&B Group immediately prior to the Effective Time and (ii) accrued but
unused vacation time and sick days, and (b) any ACNielsen Employee who
participated in a D&B Employee Benefit Plan immediately prior to the Effective
Time shall be entitled to immediate participation in a similar Employee Benefit
Plan sponsored by ACNielsen.

                  SECTION 10.4. Subsequent Employer. Except as provided in
Section 5.6 herein, if, during the one-year period following the Effective Time,
a D&B Post-Distribution Employee, a Cognizant Employee or ACNielsen Employee
terminates employment with his or her employer and then immediately commences
employment with one of the D&B Group, the Cognizant Group or the ACNielsen
Group, the subsequent employer shall cause to be recognized (to the extent
applicable) such employee's past service with the D&B Group, the Cognizant Group
or the ACNielsen Group to the extent recognized under similar plans maintained
by the prior employer. Notwithstanding the foregoing, no past service shall be

<PAGE>
                                                                              25


recognized with respect to pension accruals under the defined benefit plans of
the subsequent employer.

                  SECTION 10.5. Right to Amend or Terminate. Except as
specifically provided herein, nothing in this Agreement shall be construed or
interpreted to restrict the D&B Group's, the Cognizant Group's or the ACNielsen
Group's right or authority to amend or terminate any of their Employee Benefit
Plans following the Effective Time.

                                   ARTICLE XI
                              ACCESS TO INFORMATION

                  SECTION 11.1. Access to Information. Article IV of the
Distribution Agreement shall govern the rights of the D&B Group, the Cognizant
Group and the ACNielsen Group with respect to access to information. The term
"Records" in that Article shall be read to include all Employee Benefit Records.

                                   ARTICLE XII
                                 INDEMNIFICATION

                  SECTION 12.1. Indemnification. Article III of the Distribution
Agreement shall govern the rights of the D&B Group, the Cognizant Group and the
ACNielsen Group with respect to indemnification. The term "D&B Liabilities" in
that Article shall be read to include all Liabilities assumed by the D&B Group
pursuant to this Agreement. The term "Cognizant Liabilities" in that Article
shall be read to include all Liabilities assumed by the Cognizant Group pursuant
to this Agreement. The term "ACNielsen Liabilities" in that Article shall be
read to include all Liabilities assumed by the ACNielsen Group pursuant to this
Agreement.

                                  ARTICLE XIII
                               DISPUTE RESOLUTION

                  SECTION 13.1. Dispute Resolution. Article VI of the
Distribution Agreement shall govern the rights of the D&B Group, the Cognizant
Group and the ACNielsen Group with respect to dispute resolution. The term
"Agreement Dispute" in that Article shall be read to include all Employee
Benefit Disputes.

                                   ARTICLE XIV
                                  MISCELLANEOUS

                  SECTION 14.1. Complete Agreement; Construction. This
Agreement, including the Exhibits and Schedules (if any), and the Distribution
Agreement shall constitute the entire agreement between the parties with respect
to the subject matter hereof and 

<PAGE>
                                                                              26


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 hereto, the Schedule shall prevail. Other than Sections 2.7 and
4.5 and Article VI 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 a conflict between the provisions of this Agreement
and the provisions of the Distribution Agreement, this Agreement shall control.

                  SECTION 14.2. Ancillary Agreements. This Agreement is not
intended to address, and should not be interpreted to address, the matters
specifically and expressly covered by the Ancillary Agreements.

                  SECTION 14.3. 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.

                  SECTION 14.4. 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 14.5. Expenses. Except as otherwise set forth in this
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, the Distribution
Agreement, any Ancillary Agreement, the Information Statement (including any
registration statement on Form 10 of which such Information Statement may be a
part) and the Distribution 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 Distribution Agreement or any Ancillary Agreement, each
party shall bear its own costs and expenses incurred after the Distribution
Date. Any amount or expense to be paid or reimbursed by any party hereto to any
other party hereto shall be so paid or reimbursed promptly after the existence
and amount of such obligation is determined and demand therefor is paid.

                  SECTION 14.6. 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 

<PAGE>
                                                                              27


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, CT  06880
                  Telecopy: (203) 222-4201
                  Attn:  General Counsel

                  To ACNielsen Corporation:
                  177 Broad Street
                  Stamford, CT  06901
                  Telecopy: (203) 961-3179
                  Attn:  General Counsel

                  SECTION 14.7. 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 14.8. Amendments. Subject to the terms of Section
14.11 hereof, this Agreement may not be modified or amended except by an
agreement in writing signed by each of the parties hereto.

                  SECTION 14.9. 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 without such
consent shall be void.

                  SECTION 14.10. 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 14.11. Termination. This Agreement (including, without
limitation, Section 4.8 and Article XII hereof) 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 

<PAGE>
                                                                              28


Agreement may not be terminated except by an agreement in writing signed by the
parties; provided, however, that Section 4.8 and Article XII shall not be
terminated or amended after the Distribution in respect of the third party
beneficiaries thereto without the consent of such persons.

                  SECTION 14.12. 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 14.13. Third Party Beneficiaries. Except as provided
in Section 4.8 and Article XII, 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,
reimbursement, claim of action or other right in excess of those existing
without reference to this Agreement.

                  SECTION 14.14. 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 14.15. Exhibits and Schedules. The Exhibits and
Schedules, if any, shall be construed with and as an integral part of this
Agreement to the same extent as if the same had been set forth verbatim herein.

                  SECTION 14.16. 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 14.17. Consent to Jurisdiction. Without limiting the
provisions of Article XIII 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 14.17. 

<PAGE>
                                                                              29


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 14.18. 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.

                  SECTION 14.19. Governmental Notices; Cooperation.
Notwithstanding anything in this Agreement to the contrary, all actions
contemplated herein with respect to Employee Benefit Plans which are to be
consummated pursuant to this Agreement shall be subject to such notices to,
and/or approvals by, the Service or the PBGC (or any other governmental agency
or entity) as are required or deemed appropriate by such Employee Benefit Plan's
sponsor. Each of D&B, Cognizant and ACNielsen agrees to use its commercially
reasonable efforts to cause all such notices and/or approvals to be filed or
obtained, as the case may be. Each party hereto shall reasonably cooperate with
the other parties with respect to any government filings, employee notices or
any other actions reasonably necessary to maintain and implement the Employee
Benefit Plans covered by this Agreement.

                  SECTION 14.20. Further Assurances. From time to time, as and
when reasonably requested by any other party hereto, each party hereto shall
execute and deliver, or cause to be executed and delivered, 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 the transactions contemplated hereunder.

<PAGE>
                                                                              30


                  IN WITNESS WHEREOF, the parties have duly executed and entered
into this Agreement, as of the date 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