SECURITIES AND EXCHANGE COMMISSION 
                               Washington, D.C. 20549
 
                                      FORM 8-K
                                          
                                   CURRENT REPORT

                           Pursuant to Section 13 or 15(d)
                        of the Securities Exchange Act of 1934

 
    Date of report (date of earliest event reported):  June 30, 1998
 
 

                                COGNIZANT CORPORATION
              (Exact name of registrant as specified in its charter)


  Delaware                  1-12275                       06-1450569
(State or other           (Commission                   (IRS Employer 
jurisdiction of           File Number)                  Identification No.)
incorporation) 


            200 Nyala Farms
            Westport, Connecticut                        06880
     (Address of Principal Executive Offices)          (Zip Code)


Registrant's telephone number, including area code: (203) 222-4200 









ITEM 5.    Other Events

     On January 15, 1998, the Board of Directors of the Registrant approved 
in principle a plan to distribute to the holders of common stock of the 
Registrant (the "Distribution") all of the common stock of the Registrant's 
subsidiary, IMS Health Incorporated ("IMS HEALTH").  On June 15, 1998, the 
Registrant's Board of Directors formally approved the Distribution and 
declared a dividend payable to each holder of record of the Registrant's 
common stock at the close of business on June 25, 1998 (the "Record Date") of 
one share of IMS HEALTH common stock for each share of the Registrant's 
common stock held by such holder at the close of business on the Record Date. 
 Prior to the Distribution, the Registrant will have contributed to IMS 
HEALTH all or substantially all of the businesses which will comprise the IMS 
HEALTH business, which accounted for approximately 75% of the Registrant's 
revenues and 68% of the Registrant's operating income in 1997. Certificates 
representing shares of IMS HEALTH common stock will be mailed to stockholders 
of the Registrant on or about June 30, 1998.   The Registrant has received a 
ruling from the Internal Revenue Service to the effect that the Distribution 
will be tax-free to the Registrant and its stockholders.

     As a result of the Distribution, the Registrant will be separated into 
two independent publicly traded companies: (i) IMS HEALTH, the leading global 
provider of information solutions to the pharmaceutical and healthcare 
industries and (ii) Nielsen Media Research, Inc., the leader in television 
audience measurement services in North America.  

     IMS HEALTH is a newly created Delaware corporation, the businesses of 
which will focus on information solutions to the pharmaceutical and 
healthcare industries.  Covering over 90 countries with over 7,200 employees 
worldwide, IMS HEALTH's businesses will include those of I.M.S. 
International, Inc., the leading global supplier of market information and 
decision-support services to the pharmaceutical and healthcare industries; 
Erisco, Inc., a leading supplier of software-based administrative and 
analytical solutions to the managed care industry; Cognizant Enterprises, 
Inc., a venture capital unit focused on investments in emerging healthcare 
businesses; Cognizant Technology Solutions Corporation, a provider of 
software application development and maintenance services and Year 2000 and 
Eurocurrency compliance services; SSJ K.K., an entity based in Japan which 
markets financial application software products and services tailored for the 
Japanese market; and an equity investment in Gartner Group, Inc., the leading 
supplier of research and analysis to the information technology industry.  
Shares of IMS HEALTH Common Stock have been accepted for listing on the New 
York Stock Exchange, Inc. (the "NYSE") under the symbol "RX".

     Nielsen Media Research, Inc., currently a subsidiary of the Registrant, 
is the leading source of television audience measurement services in North 
America. As a result of the Distribution, the Nielsen Media Research business 
will remain with the Registrant, and at the time of the Distribution, the 
Registrant will change its name to Nielsen Media Research, Inc.  The 
Registrant's common stock will continue to trade on the NYSE after the 
Distribution, but the symbol under which it trades will change from "CZT" to 
"NMR".

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     After the Distribution, the Registrant will not have any ownership 
interest in IMS HEALTH, and IMS HEALTH will be an independent public company. 
 In addition, after the Distribution, IMS HEALTH will not have any ownership 
interest in the Registrant (other than 800,000 shares of common stock of the 
Registrant which IMS HEALTH has agreed to sell promptly after the 
Distribution).

     IMS HEALTH and the Registrant will enter into certain agreements 
governing the relationship between IMS HEALTH and the Registrant subsequent 
to the Distribution and providing for the allocation of tax, employee 
benefits and certain other assets and liabilities and obligations arising 
from periods prior to the Distribution, including contingent liabilities 
relating to certain litigation.  Forms of such agreements are filed as 
Exhibits 99.2 to 99.5 to this Form 8-K and are incorporated herein by 
reference.  In addition, Mr. Robert E. Weissman and Mr. M. Bernard Puckett 
will serve on the boards of directors of both companies after the 
Distribution.

     In connection with the Distribution, the Registrant has borrowed $300 
million, the proceeds of which will be used to repay existing intercompany 
indebtedness to certain entities included in IMS HEALTH.  This debt will be 
an obligation of the Registrant after the Distribution.  IMS HEALTH will 
retain $100 million in pre-existing minority-interest financing.


     Attached hereto as Exhibit 99.1 is the Information Statement dated as of 
June 22, 1998 (the "Information Statement") which the Registrant has sent to 
each of the record holders of its common stock as of the close of business on 
the Record Date.  The Information Statement contains additional information 
regarding the Distribution and the Registrant.  All of the information 
included in the following sections of the Information Statement is 
incorporated herein by reference:

     Questions and Answers About the Distribution and Related Matters
     Information Statement Summary
     Forward-Looking Statements
     Risk Factors--Risks Relating to IMS HEALTH and Nielsen Media Research and
      --Risks Relating to Nielsen Media Research
     The Distribution
     Relationship Between IMS HEALTH and Nielsen Media Research After the
      Distribution
     Dividend Policies--Nielsen Media Research
     Nielsen Media Research Capitalization
     Nielsen Media Research Selected Financial Data
     Nielsen Media Research Management's Discussion and Analysis of Financial
      Condition and Results of Operations
     Nielsen Media Research Business
     Nielsen Media Research Management and Executive Compensation
     Nielsen Media Research Security Ownership By Certain Beneficial Owners and
      Management
     Financial Statements--Nielsen Media Research, Inc. (Pages F-39 to F-59
       inclusive)

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ITEM 7.  Financial Statements; Pro Forma Financial Statements and Exhibits

(b)  Pro Forma Financial Information

     The information included in the section of the Information Statement 
entitled "Nielsen Media Research Unaudited Consolidated Pro Forma Financial 
Statements" is incorporated herein by reference.  Readers should note that 
notwithstanding the legal form of the Distribution described above, whereby 
the Registrant will "spin-off" IMS HEALTH, because of the relative 
significance of the IMS HEALTH business to the Registrant, IMS HEALTH will 
be treated as the "accounting successor" to the Registrant for financial 
reporting purposes. The pro forma financial statements incorporated by 
reference herein relate to the ongoing operations of the Registrant after 
the Distribution.

(c)  Exhibits



                                                              
Exhibit No.         Description                                         
- -----------         -----------
                 
23             Consent of Independent Accountants

27             Financial Data Schedule

99.1           Information Statement dated as of June 22, 1998

99.2           Form of Distribution Agreement between Cognizant Corporation and
               IMS Health Incorporated
 
99.3           Form of Tax Allocation Agreement between Cognizant Corporation
               and IMS Health Incorporated 

99.4           Form of Employee Benefits Agreement between Cognizant 
               Corporation and IMS Health Incorporated 

99.5           Form of Amended and Restated Transition Services Agreement among
               Cognizant Corporation, IMS Health Incorporated, The Dun &
               Bradstreet Corporation, The New Dun & Bradstreet Corporation, 
               ACNielsen Corporation and Gartner Group, Inc.




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SIGNATURES 

     Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized. 

                            COGNIZANT CORPORATION 

                            By: /s/ Kenneth Siegel               
                               ------------------------------             
                               Title: Senior Vice President
  

Date:  June 30, 1998


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                                    EXHIBIT INDEX

                                                              


Exhibit No.         Description                                         
- -----------         -----------
            
23             Consent of Independent Accountants

27             Financial Data Schedule

99.1           Information Statement dated as of June 22, 1998

99.2           Form of Distribution Agreement between Cognizant Corporation and
               IMS Health Incorporated
 
99.3           Form of Tax Allocation Agreement between Cognizant Corporation
               and IMS Health Incorporated 

99.4           Form of Employee Benefits Agreement between Cognizant 
               Corporation and IMS Health Incorporated 

99.5           Form of Amended and Restated Transition Services Agreement among
               Cognizant Corporation, IMS Health Incorporated, The Dun &
               Bradstreet Corporation, The New Dun & Bradstreet Corporation, 
               ACNielsen Corporation and Gartner Group, Inc.