SECURITIES AND EXCHANGE COMMISSION
                        Washington, D. C. 20549
 

                               FORM 10-Q

(Mark one)

(X)        QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
 EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 1998

                                     OR

(  )       TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
EXCHANGE ACT OF 1934

For the transition period from                         to
                               -----------------------    --------------------

                                         Commission file number 001-12277

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

              Delaware                                06-1454128
- - -------------------------------------     ------------------------------------
      (State of Incorporation)            (I.R.S. Employer Identification No.)

     177 Broad Street, Stamford, CT                       06901
- - ------------------------------------------         --------------------
(Address of principal executive offices)               (Zip Code)

Registrant's telephone number, including area code          (203) 961-3000
                                                          -------------------

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by  Sections  13 or 15(d)  of the  Securities  Exchange  Act of 1934
during the preceding 12 months (or for such shorter  period that the  registrant
was  required  to file such  reports),  and (2) has been  subject to such filing
requirements for the past 90 days. Yes X No

Indicate the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest practicable date:

                                                    Shares Outstanding
        Title of Class                              at July 31, 1998
        Common Stock,
        par value $.01 per share                    57,117,645







                              ACNIELSEN CORPORATION

                               INDEX TO FORM 10-Q



PART I. FINANCIAL INFORMATION                                         PAGE

Item 1. Financial Statements

Condensed Consolidated Statements of Income (Unaudited)                 3
      Three Months Ended June 30, 1998 and 1997

Condensed Consolidated Statements of Income (Unaudited)                 4
      Six Months Ended June 30, 1998 and 1997

Condensed Consolidated Statements of Cash Flows (Unaudited)             5
      Six Months Ended June 30, 1998 and 1997

Condensed Consolidated Balance Sheets                                   6
      June 30, 1998 (Unaudited) and December 31, 1997

Notes to Condensed Consolidated Financial Statements (Unaudited)        7

Item 2. Management's Discussion and Analysis of Financial               12
            Condition and Results of Operations



PART II.  OTHER INFORMATION

Item 4. Submission of matters to a vote of Security Holders             16

Item 6. Exhibits and Reports on Form 8-K                                17


SIGNATURES                                                              18



                                     -2-






PART I. FINANCIAL INFORMATION
Item I. FINANCIAL STATEMENTS

ACNIELSEN CORPORATION
Condensed Consolidated Statements Of Income (Unaudited)
(Amounts in thousands except per share amounts)


                                                                                   Three Months Ended
                                                                                        June 30,
                                                                       --------------------------------------------

                                                                                1998                    1997
                                                                       -----------------------    -----------------
                                                                                                  
Operating Revenue                                                            $ 346,495                  $ 356,325

Operating Costs                                                                163,608                    184,599
Selling and Administrative Expenses                                            133,307                    130,011
Depreciation and Amortization                                                   20,959                     23,058
Year 2000 Expenses                                                               2,701                          -
                                                                       -----------------          -----------------

Operating Income                                                                25,920                     18,657


Interest Income                                                                  2,342                      1,021
Interest Expense                                                                  (317)                      (384)
Other - Net                                                                       (207)                      (315)
                                                                       -----------------          -----------------
Other Income - Net                                                               1,818                        322

Income Before Income Tax Provision                                              27,738                     18,979

Income Tax Provision                                                            11,650                      8,730
                                                                       -----------------          -----------------

Net Income                                                                    $ 16,088                   $ 10,249
                                                                       =================          =================


Net Income Per Share of Common Stock - Basic                                    $ 0.28                     $ 0.18
                                                                       =================          =================

Net Income Per Share of Common Stock - Diluted                                  $ 0.27                     $ 0.18
                                                                       =================          =================

Weighted Average Number of Shares Outstanding
                Basic                                                           57,281                     57,035
                Diluted                                                         59,670                     57,536



<FN>
See  accompanying  notes  to the  condensed  consolidated  financial  statements
(unaudited).
</FN>


                                     -3-



PART I. FINANCIAL INFORMATION
Item I. FINANCIAL STATEMENTS

ACNIELSEN CORPORATION
Condensed Consolidated Statements Of Income (Unaudited)
(Amounts in thousands except per share amounts)



                                                                                    Six Months Ended
                                                                                        June 30,
                                                                       --------------------------------------------

                                                                                1998                    1997
                                                                       -----------------------    -----------------
                                                                                                  
Operating Revenue                                                            $ 672,296                  $ 681,099

Operating Costs                                                                335,582                    366,700
Selling and Administrative Expenses                                            262,183                    258,013
Depreciation and Amortization                                                   42,370                     46,907
Year 2000 Expenses                                                               6,037                          -
                                                                       -----------------          -----------------

Operating Income                                                                26,124                      9,479

Interest Income                                                                  5,423                      3,052
Interest Expense                                                                  (601)                    (1,685)
Other - Net                                                                       (106)                       511
                                                                       -----------------          -----------------
Other Income - Net                                                               4,716                      1,878

Income Before Income Tax Provision                                              30,840                     11,357

Income Tax Provision                                                            12,953                      5,224
                                                                       -----------------          -----------------

Net Income                                                                    $ 17,887                    $ 6,133
                                                                       =================          =================


Net Income Per Share of Common Stock - Basic                                    $ 0.31                     $ 0.11
                                                                       =================          =================

Net Income Per Share of Common Stock - Diluted                                  $ 0.30                     $ 0.11
                                                                       =================          =================

Weighted Average Number of Shares Outstanding
                Basic                                                           57,319                     56,977
                Diluted                                                         59,604                     57,313



<FN>
See  accompanying  notes  to the  condensed  consolidated  financial  statements
(unaudited).
</FN>






                                   -4-






ACNIELSEN CORPORATION
Condensed Consolidated Statements of Cash Flows (Unaudited)
(Amounts in Thousands)


                                                                                 Six Months Ended
                                                                                     June 30,
                                                                  -----------------------------------------------
                                                                              1998                    1997
                                                                  -----------------------------------------------

- - -----------------------------------------------------------------------------------------------------------------
                                                                                                           
Cash Flows from Operating Activities:
Net Income                                                                  $ 17,887                  $ 6,133
  Reconciliation of Net Income to Net Cash Provided By
  Operating Activities:
    Depreciation and Amortization                                             42,370                   46,907
    Deferred Income Taxes                                                        205                    2,846
    Payments Related to Special Charges                                      (15,162)                 (21,157)
    Postemployment Benefit Expense                                             1,923                      227
    Postemployment Benefit Payments                                           (6,879)                  (5,718)
    Net Increase in Accounts Receivable                                      (14,769)                  (4,082)
    Net Increase in Other Working Capital Items                               (3,589)                 (26,667)
    Other                                                                     (1,472)                   4,552
- - ----------------------------------------------------------------------------------------------------------------
Net Cash Provided by Operating Activities                                     20,514                    3,041
- - ----------------------------------------------------------------------------------------------------------------

Cash Flows from Investing Activities:
Capital Expenditures                                                         (19,551)                 (20,827)
Additions to Computer Software                                               (11,535)                  (6,719)
Payments for Acquisition of Businesses                                       (68,360)                  (5,082)
Decrease in Other Investments                                                  1,931                    1,800
Other                                                                        (11,189)                  (9,788)  
- - ----------------------------------------------------------------------------------------------------------------
Net Cash Used in Investing Activities                                       (108,704)                 (40,616)
- - ----------------------------------------------------------------------------------------------------------------

Cash Flows from Financing Activities:
Increase (Decrease) in Short-Term Borrowings                                  20,797                  (10,347)
Treasury Stock Purchases                                                     (21,517)                       -
Proceeds from the Sale of Common Stock under Option Plans                      7,035                    1,613
Other                                                                           (142)                     222
- - ----------------------------------------------------------------------------------------------------------------
Net Cash Provided by (Used in) Financing Activities                            6,173                   (8,512)
- - ----------------------------------------------------------------------------------------------------------------
Effect of Exchange Rate Changes on Cash and Cash Equivalents                  (4,380)                  (5,171)
- - ----------------------------------------------------------------------------------------------------------------
Decrease in Cash and Cash Equivalents                                        (86,397)                 (51,258)
Cash and Cash Equivalents, Beginning of Period                               205,726                  185,005
- - ----------------------------------------------------------------------------------------------------------------
Cash and Cash Equivalents, End of Period                                   $ 119,329                $ 133,747
- - ----------------------------------------------------------------------------------------------------------------

Supplemental disclosure of cash flow information:
Cash Paid During the Period for Interest                                       $ 609                  $ 1,751
Cash Paid During the Period for Income Taxes                                $ 13,778                 $ 19,562

Noncash Investing and Financing Activities:
Acquisition of Investment and Note Receivable in exchange for               $ 19,400                        -
   Business Assets and Liabilities assumed

<FN>
See  accompanying  notes  to the  condensed  consolidated  financial  statements
(unaudited).
</FN>


                                        -5-





ACNIELSEN CORPORATION
Condensed Consolidated Balance Sheets
(Amounts in thousands)


- - --------------------------------------------------------------------------------------------------------------------------
                                                                                      June 30,               December 31,
                                                                                        1998                     1997
                                                                                    (Unaudited)
- - --------------------------------------------------------------------------------------------------------------------------
                                                                                                      
Assets

Current Assets
Cash and Cash Equivalents                                                              $ 119,329              $ 205,726
Accounts Receivable-Net                                                                  267,373                260,821
Other Current Assets                                                                      48,598                 38,423
                                                                                  -----------------          -------------
       Total Current Assets                                                              435,300                504,970
Notes Receivable and Other Investments                                                    28,181                 10,281
Property, Plant and Equipment-Net                                                        146,817                165,660
Other Assets-Net
Prepaid Pension                                                                           58,685                 57,425
Computer Software                                                                         28,302                 25,288
Intangibles & Other Assets                                                                56,593                 55,001
Goodwill                                                                                 275,025                220,483
                                                                                  -----------------          -------------
       Total Other Assets-Net                                                            418,605                358,197
- - --------------------------------------------------------------------------------------------------------------------------
TOTAL ASSETS                                                                         $ 1,028,903            $ 1,039,108
- - --------------------------------------------------------------------------------------------------------------------------
Liabilities and Shareholders' Equity

Current Liabilities
Accounts  Payable                                                                       $ 77,352               $ 86,908
Short-Term Debt                                                                           45,358                 25,957
Accrued and Other Current Liabilities                                                    314,956                313,864
Accrued Income Taxes                                                                      39,513                 42,385
                                                                                  -----------------          -------------
       Total Current Liabilities                                                         477,179                469,114
Postretirement and Postemployment Benefits                                                45,757                 49,400
Deferred Income Taxes                                                                     27,129                 27,609
Other Liabilities                                                                         25,769                 32,881
- - --------------------------------------------------------------------------------------------------------------------------
TOTAL LIABILITIES                                                                        575,834                579,004
- - --------------------------------------------------------------------------------------------------------------------------
Commitments and Contingencies
Shareholders' Equity
Common Stock                                                                                 583                    577
Additional Paid-in Capital                                                               481,751                471,493
Retained Earnings                                                                         61,507                 43,620
Treasury Stock                                                                           (25,483)                (3,966)
Accumulated Other Comprehensive Income:
       Cumulative Translation Adjustment                                                 (65,289)               (51,620)
                                                                                  -----------------          -------------
Total Shareholders' Equity                                                               453,069                460,104
- - --------------------------------------------------------------------------------------------------------------------------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY                                           $ 1,028,903            $ 1,039,108
- - --------------------------------------------------------------------------------------------------------------------------
<FN>
See  accompanying  notes  to the  condensed  consolidated  financial  statements
(unaudited).
</FN>


                                        -6-



ACNIELSEN CORPORATION
NOTES TO CONDENSED  CONSOLIDATED  FINANCIAL  STATEMENTS  
(Amounts in  thousands, except per share data) (Unaudited)

Note 1 - Interim Consolidated Financial Statements

These interim consolidated financial statements have been prepared in accordance
with the  instructions  to Form 10-Q and should be read in conjunction  with the
consolidated financial statements and related notes in the ACNielsen Corporation
(the  "Company")  1997 Annual Report on Form 10-K. In the opinion of management,
all adjustments  (which include only normal recurring  adjustments),  considered
necessary for a fair presentation of financial  position,  results of operations
and cash flows at the dates and for the periods  presented  have been  included.
Certain  prior year  amounts  have been  reclassified  to conform  with the 1998
presentation.

Note 2 - Financial Instruments with Off-Balance-Sheet Risk

The Company uses foreign exchange forward  contracts to hedge  significant known
transactional  exposures.  At June 30,  1998 the  Company had $21,583 of foreign
currency forward contracts  outstanding,  which mature on various dates over the
next six months.  These forward contracts mature in monthly installments through
December  31,  1998.  Any gain or loss on the forward  contract is deferred  and
included in the measurement of the related foreign currency transaction.

The Company does not utilize  derivative  financial  instruments  for trading or
other speculative purposes.

Note 3 - Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per
share (EPS) for the respective periods:





Three months ended June 30                                                              1998            1997
- - ------------------------------------------------------------------------------ -------------- ---------------
                                                                                              

Weighted-average number of shares outstanding for basic EPS                           57,281          57,035
Dilutive effect of shares issuable as of period-end under stock option
   plans                                                                               2,389             501
                                                                               -------------- ---------------
Weighted-average number of shares and share equivalents for diluted EPS
                                                                                      59,670          57,536
                                                                               ============== ===============
                                                                               ============== ===============

Net Income                                                                          $ 16,088        $ 10,249
                                                                               ============== ===============
                                                                               ============== ===============

Basic Earnings Per Share                                                              $ 0.28          $ 0.18
                                                                               ============== ===============

Diluted Earnings Per Share                                                            $ 0.27          $ 0.18
                                                                               ============== ===============




                                        -7-







Six months ended June 30                                                                 1998           1997
- - ------------------------------------------------------------------------------ --------------- --------------
                                                                                               

Weighted-average number of shares outstanding for basic EPS                           57,319          56,977
Dilutive effect of shares issuable as of period-end under stock option
   plans                                                                               2,285             336
                                                                               ============== ===============
Weighted-average number of shares and share equivalents for diluted EPS
                                                                                      59,604          57,313
                                                                               ============== ===============

Net Income                                                                          $ 17,887         $ 6,133
                                                                               ============== ===============

Basic Earnings Per Share                                                              $ 0.31          $ 0.11
                                                                               ============== ===============
                                                                               ============== ===============

Diluted Earnings Per Share                                                             $ .30          $ 0.11
                                                                               ============== ===============



Note 4 - Acquisition

On June 30, 1998, the Company acquired BBI Marketing Services, Inc. ("BASES"), a
provider of simulated  test-marketing services. The Company paid $65,000 and may
be required to make additional cash payments if BASES achieves certain operating
goals. The maximum amount of contingent  consideration is approximately  $36,000
(payable through 2001).

The purchase  price  allocations  have been prepared on a preliminary  basis and
changes are expected as evaluations of assets and  liabilities are completed and
as additional  information becomes available.  Pending the receipt of additional
information,  the purchase price of $65,000 has been recorded as goodwill in the
accompanying condensed consolidated balance sheet as of June 30, 1998.

If BASES had been acquired on January 1, 1997, this  acquisition  would not have
had a material  impact on the Company's  consolidated  results of operations for
any of the periods presented.

Note 5 - Bank Credit Line

In April 1998, the Company  replaced its existing  $125,000 bank credit facility
with a new $250,000  bank credit  facility.  The new credit  facility,  which is
provided by a global bank syndicate  comprising  twelve banks,  is unsecured and
has a  three-year  term.  The new credit  facility  includes  subfacilities  for
borrowings in foreign  currencies and for the issuance of letters of credit. The
base interest rates  applicable to borrowings  may be fixed or various  floating
rates, depending on the type and currency of the borrowing. Interest spreads and
fees are based upon the Company's  fixed charge coverage ratio for the preceding
four quarters.  The terms of the credit agreement  contain,  among other things,
limitations on debt of the Company and its subsidiaries and financial  covenants
requiring  the  Company  to  maintain  compliance  with a minimum  fixed  charge
coverage ratio requirement and a maximum leverage ratio requirement. At June 30,
1998, approximately $41,600 was outstanding under the new credit facility. There
are no compensating  balance requirements or material commitment fees associated
with the new credit facility.

                                        -8-


Note 6 - New Accounting Pronouncements

The Company has adopted  Statement of Financial  Accounting  Standards  No. 130,
"Reporting  Comprehensive Income", which establishes standards for the reporting
and  disclosure  of  comprehensive  income and its  components  in the financial
statements.  This  statement  is  effective  for interim and annual  periods for
fiscal years  beginning  after  December  15,1997.  The Company's  comprehensive
income for the  respective  periods,  reported  net of tax, are set forth in the
following table:




Three months ended June 30                                                1998             1997
- - -------------------------------------------------------------------   ------------     ----------- 
                                                                                  
 
Net Income                                                              $ 16,088        $ 10,249

Other comprehensive loss, net of tax:
   Foreign currency translation adjustments                               (3,363)         (3,296)
   Unrealized gain on securities                                               -          16,443
                                                                       -----------     -----------
        Comprehensive income                                            $ 12,725        $ 23,396
                                                                    ==============    ============ 





Six months ended June 30                                                  1998             1997
- - ------------------------------------------------------------------- ---------------- ---------------
                                                                                      
Net Income                                                                  $ 17,887        $ 6,133

Other comprehensive income (loss), net of tax:
   Foreign currency translation adjustments                                  (13,669)       (12,179)
   Unrealized gain on securities                                                   -         15,451
                                                                         -----------    ------------

        Comprehensive income                                                $  4,218        $ 9,405
                                                                    ================= ==============



In April 1998, the American  Institute of Certified  Public  Accountants  issued
Statement  of  Position  (SOP)  98-5,   "Reporting  on  the  Costs  of  Start-Up
Activities."  The SOP,  which the  Company  plans to adopt on  January  1, 1999,
requires  that  costs  of the  Company's  start-up  activities  be  expensed  as
incurred.  The Company currently  capitalizes  certain one-time costs related to
introducing  new  services  and  conducting  business in new  geographic  areas.
Adoption of this SOP is expected  to result in a one-time,  non-cash,  after-tax
charge recorded as a cumulative effect of a change in accounting in the range of
$15,000  to  $20,000.  However,  adoption  of the new  accounting  policy is not
expected  to  have  a  material  impact  on  the  Company's  future  results  of
operations.

In June 1998,  the  Financial  Accounting  Standards  Board issued  Statement of
Financial Accounting  Standards No. 133, "Accounting for Derivative  Instruments
and Hedging  Activities".  The Statement  establishes  accounting  and reporting
standards  requiring  that  every  derivative   instrument   (including  certain
derivative  instruments  embedded in other contracts) be recorded in the balance
sheet as either an asset or liability  measured at its fair value. The Statement
requires that changes in the derivative's fair value be recognized  currently in
earnings unless specific hedge accounting  criteria are met. Special  accounting
for qualifying  hedges allows a derivative's  gains and losses to offset related
results on the hedged item in the income statement,  and requires that a company
must formally document,  designate, and assess the effectiveness of transactions
that receive hedge accounting.

                                        -9-


Statement  133 is effective  for fiscal years  beginning  after June 15, 1999. A
company may also  implement  the  Statement  as of the  beginning  of any fiscal
quarter after  issuance  (that is, fiscal  quarters  beginning June 16, 1998 and
thereafter).  Statement 133 cannot be applied retroactively.  Statement 133 must
be applied to (a) derivative  instruments and (b) certain derivative instruments
embedded  in hybrid  contracts  that were  issued,  acquired,  or  substantively
modified after December 31, 1997 (and, at the Company's election, before January
1, 1998).

The Company has not yet quantified the impacts of adopting  Statement 133 on its
financial  statements and has not determined the timing of or method of adoption
of Statement 133. However,  the Statement could increase  volatility in earnings
and other comprehensive income.

Note 7 - Litigation
On July 29, 1996, Information  Resources,  Inc. ("IRI") filed a complaint in the
United States  District Court for the Southern  District of New York,  naming as
defendants The Dun & Bradstreet  Corporation  ("Old D&B"),  A.C. Nielsen Company
(which is a subsidiary of the Company  "ACNielsenCo") and I.M.S.  International,
Inc. ("IMS"),  formerly a subsidiary of Cognizant Corporation  ("Cognizant") and
currently a subsidiary of IMS Health Incorporated (the "IRI Action").

The complaint  alleges various  violations of the United States  antitrust laws,
including  alleged  violations  of  Sections  1 and 2 of the  Sherman  Act.  The
complaint  also alleges a claim of tortious  interference  with a contract and a
claim of tortious interference with a prospective business  relationship.  These
latter claims relate to the  acquisition by defendants of Survey  Research Group
Limited  ("SRG").  IRI alleges that SRG violated an alleged  agreement  with IRI
when it agreed to be acquired by the defendants and that the defendants  induced
SRG to breach that agreement.

IRI's  complaint  alleges  damages in excess of  $350,000,  which amount IRI has
asked to be trebled under the antitrust laws. IRI also seeks punitive damages in
an unspecified amount.

By  notice of motion  dated  October  15,  1996,  defendants  moved for an order
dismissing  all  claims  in the  complaint.  On May 6,  1997 the  United  States
District  Court for the  Southern  District of New York issued a decision on the
motion to dismiss.  The Court dismissed IRI's claim of attempted  monopolization
in the United States with leave to replead  within sixty days.  The Court denied
defendants'  motion with respect to the remaining  claims in the  complaint.  On
June 3, 1997,  defendants filed an answer and  counterclaims.  Defendants denied
all material  allegations of the complaint.  In addition,  ACNielsenCo  asserted
counterclaims  against  IRI  alleging  that IRI has made  false  and  misleading
statements about ACNielsenCo's  services and commercial activities and that such
conduct  constitutes  a violation of Section  43(a) of the Lanham Act and unfair
competition. ACNielsenCo seeks injunctive relief and damages.

On July 7, 1997, IRI filed an amended  complaint seeking to replead the claim of
attempted  monopolization in the United States,  which had been dismissed by the
Court in its May 6, 1997  decision.  By notice of motion  dated August 18, 1997,
defendants moved for an order dismissing the amended claim. On December 1, 1997,
the Court denied defendants' motion.

                                        -10-


In connection with the IRI Action, Old D&B, Cognizant (the former parent company
of IMS) and the Company  entered into an Indemnity and Joint  Defense  Agreement
(the "Indemnity and Joint Defense Agreement")  pursuant to which they agreed (i)
to certain  arrangements  allocating  potential  liabilities ("IRI Liabilities")
that may arise out of or in connection with the IRI Action and (ii) to conduct a
joint  defense of such action.  In  particular,  the Indemnity and Joint Defense
Agreement  provides  that the Company will assume  exclusive  liability  for IRI
Liabilities  up  to  a  maximum  amount  to  be  calculated  at  the  time  such
liabilities,  if any,  become  payable  (the  "ACN  Maximum  Amount"),  and that
Cognizant and Old D&B will share liability  equally for any amounts in excess of
the ACN  Maximum  Amount.  The ACN  Maximum  Amount  will  be  determined  by an
investment  banking firm as the maximum  amount which the Company is able to pay
after giving effect to (i) any plan submitted by such  investment  bank which is
designed to maximize the claims paying ability of the Company without  impairing
the investment  banking firm's ability to deliver a viability opinion (but which
will not require any action requiring stockholder approval), and (ii) payment of
related fees and expenses.  For these  purposes,  financial  viability means the
ability of the Company, after giving effect to such plan, the payment of related
fees and expenses and the payment of the ACN Maximum Amount, to pay its debts as
they become due and to finance the current and anticipated operating and capital
requirements of its business,  as reconstituted by such plan, for two years from
the date any such plan is expected to be implemented.

The Indemnity and Joint Defense  Agreement also imposes certain  restrictions on
the payment of cash  dividends  and the  ability of the Company to purchase  its
stock.

In June  1998 (i) Old D&B  changed  its name to R.H.  Donnelly  Corporation  and
spun-off  (the "D&B Spin") a company now named The Dun & Bradstreet  Corporation
("New D&B"), and (ii) Cognizant changed its name to Nielsen Media Research, Inc.
("NMR")  and  spun-off  (the  "Cognizant  Spin")  a  company  named  IMS  Health
Incorporated ("IMS Health").  Pursuant to the terms of a Distribution  Agreement
dated as of October 28, 1996 among the Company,  Old D&B and Cognizant,  New D&B
was  required as a condition  to the D&B Spin,  and IMS Health was required as a
condition to the  Cognizant  Spin, to undertake to the Company to be jointly and
severally  liable with its former parent  company for,  among other things,  the
obligations  of such former parent company under the Indemnity and Joint Defense
Agreement.  Each of New D&B and IMS Health did provide such  undertaking  to the
Company.

Management  of ACNielsen is unable to predict at this time the final  outcome of
the IRI Action or whether its resolution could  materially  affect the Company's
results of operations, cash flows or financial position.

The Company and its  subsidiaries  are also involved in other legal  proceedings
and  litigation  arising in the ordinary  course of business.  In the opinion of
management,   the  outcome  of  such  current  legal  proceedings,   claims  and
litigation,  if decided adversely,  could have a material effect on quarterly or
annual  operating  results  or cash  flows  when  resolved  in a future  period.
However, in the opinion of management,  these matters will not materially affect
the Company's consolidated financial position.

                                        -11-


Item 2. Management's  Discussion and Analysis of Financial Condition and 
Results of Operations (Dollar amounts in thousands, except per share data)

Quarter ended June 30, 1998 compared with Quarter ended June 30, 1997

Net income for the second  quarter  was $16,088 or $0.27 per  diluted  share,  a
$5,839,  or $0.09 per share  improvement  over the second  quarter of 1997.  Net
income included an after-tax negative currency  translation impact of $2,372, or
$0.04 per diluted share.

Revenue for the quarter  ended June 30,  1998 was  $346,495,  a decrease of 2.8%
from the second quarter of 1997, reflecting the negative impact of a strong U.S.
dollar.  Driven by solid growth in all regions,  revenue  advanced 4.2% in local
currency.

The Company's operating income in the second quarter increased 38.9% or, $7,263,
to $25,920,  despite a negative currency  translation  impact of $4,089.  Strong
U.S. revenue growth, coupled with improved operating efficiency across all three
of the Company's regions,  drove the substantial  increase.  Excluding Year 2000
costs, operating income increased 53.4% or $9,964, to $28,621.

Other  income-net was $1,818,  compared with $322 in the second quarter of 1997,
primarily reflecting increased interest income on higher average cash balances.

The Company's  operating  results by geographic region for the quarters ended
June 30, 1998 and 1997 are set forth in the table below.



                                                    Operating Revenue           Operating Income
                                                                                     (Loss)
                                              ---------------------------- -------------------------
                                                   1998           1997         1998          1997
                                                                              

United States                                   $  89,329     $  78,206     $  9,620      $  4,268
Canada/ Latin America                              46,829        52,499        7,312         7,065
                                                   ------        ------        -----         -----
    Total Americas                                136,158       130,705       16,932        11,333
Europe, Middle East & Africa                      146,005       149,374        9,699         8,243
Asia Pacific *                                     64,332        76,246        1,990         (919)
                                                   ------        ------       ------       -------
   Subtotal                                       346,495       356,325       28,621        18,657
Year 2000 Costs                                         -             -       (2,701)            - 
                                                  -------       -------      -------       -------

   Total                                        $ 346,495     $ 356,325     $ 25,920      $ 18,657
                                                =========     =========     ========      ========
<FN>
         *Includes ACNielsen Japan
</FN>


The following discusses results on a geographic basis:

Total Americas revenue  increased 4.2% to $136,158 from $130,705.  Excluding the
impact of currency translation, revenue grew 6.6%. Operating income was $16,932,
a $5,599  improvement  over the prior year,  including an $897 negative  foreign
translation impact.

In the United States, revenue grew 14.2% to $89,329, reflecting continued growth
in account-level information,  advances in modeling and analytics and additional
revenue  from new clients and from  ACNielsen  EDI,  acquired in December  1997.
Excluding  ACNielsen EDI, U.S. revenue grew 11.3%.  Operating income was $9,620,
an  increase  of $5,352  over the prior  year.  Revenue  growth  and  continuing
improvements in operating efficiency drove the gain.

                                        -12-


In Canada and Latin America,  reported revenue of $46,829 was down 10.8%, $5,670
from the prior year quarter,  due to the transfer in January 1998 of ACNielsen's
media  business to the IBOPE joint  venture and a negative  foreign  translation
impact of $3,175.  Excluding the transfer,  local currency revenue from the base
business rose 3.8%,  resulting from higher retail  measurement  sales in Canada,
Mexico,  Brazil and Colombia.  Operating  income  increased  3.5% to $7,312 from
$7,065  in  1997,   including  a  $897  negative  impact  of  foreign   currency
translation.

Revenue in the Europe,  Middle East & Africa  ("EMEA")  region  declined 2.3% to
$146,005,  from  $149,374 in 1997,  due to a $7,497  negative  impact of foreign
currency  translation.  Revenue for EMEA grew 2.8% in local currency,  primarily
the result of strong growth in Eastern  Europe and higher  revenue in the United
Kingdom and  France.  EMEA  increased  its  operating  income for the quarter by
$1,456, or 17.7%, to $9,699,  despite a negative currency  translation impact of
$887.  The  improvement  was the result of  improved  operating  efficiency  and
increased productivity.

Asia Pacific's revenue decreased 15.6% to $64,332 from $76,246, due to a $14,081
negative impact from currency translation. Revenue for Asia Pacific grew 2.8% in
local currency due to increases in the  Philippines,  China/Hong Kong, Japan and
Australia,  as well as new revenues  from the  Company's  expanded  operation in
India.  Operating  income  increased  $2,909 to  $1,990,  including  a  negative
currency  translation impact of $2,326.  Operating income in local currency rose
$5,235.   The  profit   improvement   reflects   ongoing   efforts  to  increase
productivity,  improve  operating  efficiency and lower costs,  particularly  in
Japan.

Six months ended June 30, 1998 compared with Six months ended June 30, 1997.

Net  income  for the six months  ended  June 30,  1998 was  $17,887 or $0.30 per
diluted share, a $11,754,  or $0.19 per share  improvement  over the prior year.
Net income included an after-tax negative currency translation impact of $3,700,
or $0.06 per diluted share.

Revenue  for the six months  ended June 30,  1998 was  $672,296,  a decrease  of
$8,803 or 1.3% from the first six months of 1997,  reflecting a negative foreign
currency  translation impact of $54,403.  Driven by solid growth in all regions,
revenue advanced 6.7% in local currency.

The Company's  operating income for the six months ended June 30, 1998 increased
$16,645 to $26,124,  despite a negative currency  translation  impact of $6,379.
Strong U.S. revenue growth,  coupled with improved  operating  efficiency across
all three of the Company's regions,  drove the substantial  increase.  Excluding
Year 2000 costs, operating income increased $22,682 to $32,161.

Other  income-net  was $4,716,  compared  with $1,878 in the first six months of
1997,  primarily  reflecting  lower  interest  expense on lower  borrowings  and
increased interest income on higher average cash balances.

                                        -13-


The  Company's  operating  results by  geographic  region for the six months 
ended June 30, 1998 and 1997 are set forth in the table below.


                                                   Operating Revenue            Operating Income
                                                                                    (Loss)
                                               -------------------------    ------------------------ 
                                                    1998          1997          1998          1997
                                                                                
United States                                   $ 172,496     $ 151,513      $ 15,405       $ 4,718
Canada/ Latin America                              94,895       100,558        12,748         9,896
                                                   ------       -------        ------         -----
    Total Americas                                267,391       252,071        28,153        14,614
Europe, Middle East & Africa                      277,603       282,999         4,662         1,245
Asia Pacific *                                    127,302       146,029          (654)       (6,380)
                                                  -------       -------        ------        ------
   Subtotal                                       672,296       681,099        32,161         9,479
Year 2000 Costs                                         -             -        (6,037)            -
                                                ---------     ---------      --------       -------
Total                                           $ 672,296     $ 681,099      $ 26,124       $ 9,479
                                                =========     =========      ========       =======
<FN>
         *Includes ACNielsen Japan
</FN>



The following discusses results on a geographic basis:

Total Americas revenue  increased 6.1% to $267,391 from $252,071.  Excluding the
impact of currency translation, revenue grew 8.6%. Operating income was $28,153,
a $13,539  improvement over the prior year,  including a $1,632 negative foreign
translation impact.

In the United  States,  revenue grew $20,983,  or 13.8% to $172,496,  reflecting
continued  growth in  account-level  information,  consumer  panel,  advances in
modeling  and  analytics  and  additional  revenue  from  new  clients  and from
ACNielsen EDI, acquired in December 1997.  Excluding ACNielsen EDI, U.S. revenue
grew 10.9%.  Operating income was $15,405, an increase of $10,687 over the prior
year. Revenue growth and continuing  improvements in operating  efficiency drove
the gain.

In Canada and Latin  America,  reported  revenue  of  $94,895  was down 5.6% or,
$5,663 from the prior year,  due to the transfer in January 1998, of ACNielsen's
media  business to the IBOPE joint  venture and a negative  foreign  translation
impact of $6,459.  Excluding the transfer,  local currency revenue from the base
business rose 8.6%,  resulting from higher retail  measurement  sales in Brazil,
Mexico,  Canada and Colombia.  Operating  income increased 28.8% to $12,748 from
$9,896  in  1997,  including  a  $1,632  negative  impact  of  foreign  currency
translation.

Revenue in the Europe,  Middle East & Africa  ("EMEA")  region  declined 1.9% to
$277,603, from $282,999 in 1997, reflecting a $20,447 negative impact of foreign
currency  translation.  Revenue for EMEA grew 5.3% in local currency,  primarily
the result of strong growth in Eastern Europe,  higher revenue in France and the
United Kingdom and the new acquisitions in South Africa, Turkey and Israel. EMEA
increased its  operating  income  $3,417 to $4,662  despite a negative  currency
translation  impact of $1,384,  reflecting  improved  operating  efficiency  and
increased productivity.

                                        -14-

Asia  Pacific's  revenue  decreased  12.8% to $127,302 from  $146,029,  due to a
$27,497 negative impact from currency translation. Revenue for Asia Pacific grew
6.0% in local currency due to increases in China/Hong  Kong, the Philippines and
Japan,  as well as new revenues  from expanded  operations in India.  The region
reduced its operating  loss from $6,380 to $654,  including a negative  currency
translation  impact of $3,394.  Operating  income in local currency rose $9,120.
The  profit  improvement  reflects  ongoing  efforts to  increase  productivity,
improve operating efficiency and lower costs, particularly in Japan.

Liquidity and Capital Resources
Six Months Ended June 30, 1998 and 1997

Net cash provided by operating activities for the six months ended June 30, 1998
totaled  $20,514  compared with $3,041 for the  comparable  period in 1997.  The
change  primarily  is the result of improved  operating  results  (net income of
$17,887 in 1998 as compared to net income of $6,133 in 1997) and lower  payments
related to special  charges  ($5,995) and for income taxes  ($5,784),  partially
offset by a greater increase in accounts receivable ($10,687).

Net cash used in investing  activities totaled $108,704 for the six months ended
June 30, 1998  compared  with  $40,616 for the  comparable  period in 1997.  The
increase in cash used in investing  activities of $68,088  primarily  represents
cash paid to acquire  BASES  ($65,000),  and  increased  additions  to  computer
software ($4,816).

Net cash  provided by  financing  activities  for the six months  ended June 30,
1998,  totaled $6,173 compared with cash used in financing  activities of $8,512
for the  comparable  period in 1997.  The  increase in cash  provided of $14,685
primarily reflected  borrowings in the current year of $20,797 to partially fund
the  acquisition of BASES,  as compared with a decrease in borrowings of $10,347
during the comparable  period in 1997,  offset by payments to repurchase  common
stock ($21,517).

During  the first  quarter  of 1998,  the  Company  became a partner  in a joint
venture that provides media  measurement  services in Latin  America.  The joint
venture, IBOPE Media Information,  offers television audience measurement (TAM),
radio  audience  measurement  (RAM),  and  advertising  expenditure  measurement
services  (AEM) in  various  Latin  American  markets.  Under  the  terms of the
agreement,  the Company received an 11% equity interest in the joint venture and
a $9,400 interest  bearing note in exchange for the Company's Latin America TAM,
RAM and AEM business assets and the assumption of certain transition liabilities
in a non-cash  transaction.  The first half 1998 financial  statements reflect a
preliminary  allocation of the business assets  exchanged that will be finalized
later  in the  year.  The  Company  did  not  recognize  a gain  or  loss on the
transaction.

Year 2000

The Company relies on software and related  technologies in the operation of its
business.  Based on a comprehensive  assessment,  the Company determined that it
will be required to modify or replace  significant  portions of its  software so
that its computer systems will be Year 2000 compliant.  The Company is utilizing
internal and external  resources  to execute its Year 2000  compliance  program.
Third-party  contract   programmers  have  been  retained,   and  are  presently
renovating  and  testing  software.  Renovation  of  code  is  scheduled  to  be
substantially  complete by year end 1998, with testing and implementation of new
programs to be completed by mid-1999.  The Company  currently  believes  that it
will be able to modify or replace its  affected  systems in a timely  manner and
with no significant disruptions to its operations.

                                        -15-


Preliminary  estimates  of the total Year 2000  compliance  costs to be incurred
with respect to the  affected  systems  approximate  $15,000 to $20,000 over the
costs of normal software upgrades and replacements. Maintenance and modification
costs will be  expensed as  incurred,  while the costs of new  software  will be
capitalized and amortized over the software's useful life.

Such costs are  expected to be incurred  primarily  in 1998 and totaled  $6,037
and $0 for the six months ended June 30, 1998 and 1997, respectively.

The  Company  also is  communicating  with  its  data  suppliers  and  customers
regarding the Year 2000 issue. Failure by data suppliers to successfully address
the issue could result in delays in data  becoming  available to the Company for
use in its  products and  services.  Failure by customers  could  disrupt  their
ability to maximize  their use of such  products  and  services.  The Company is
currently unable to determine the effect,  if any, that such failures might have
on the Company's operations or future business results.


PART II.  OTHER INFORMATION

Item 4.  Submission of Matters to a Vote of Security Holders

The Annual Meeting of  Shareholders  of ACNielsen  Corporation was held on April
15, 1998.

The following nominees for director named in the Proxy Statement dated March 13,
1998 were elected at the Meeting by the votes indicated.

                                For                           Withheld

Robert H. Beeby              52,189,621                        319,192

Thomas C. Hays               52,191,434                        317,379

Robert J Lievense            52,154,808                        354,005

John R. Meyer                52,180,230                        328,583

The votes in favor of the election of the nominees represent at least 99.3%
of the shares voted for each of the nominees.

The  ratification of the selection of Arthur Andersen LLP as independent  public
accountants to audit the Company's  consolidated  financial  statements for 1998
was approved by the following vote:

                           For             Against             Abstain
Number of shares        52,427,890          36,439              44,484

                                       -16-


Item 6.  Exhibits and Reports on Form 8-K

(a)    Exhibits.
         (4)   Instruments Defining the Rights of Security Holders, including
               Indentures
             (b)  ACNielsen Corporation U.S. $250,000,000 Credit Agreement 
              dated as of April 15, 1998
         (27)   Financial Data Schedule (filed electronically)
         (99)   Other Exhibits
               (a)   Letter of Undertaking dated June 29, 1998 from The New Dun
                     & Bradstreet  Corporation to Cognizant Corporation and 
                     ACNielsen Corporation
               (b)   Letter of  Undertaking  dated June 29, 1998 from IMS Health
                     Incorporated  to  The  Dun  &  Bradstreet  Corporation  and
                     ACNielsen Corporation

(b)    Reports on Form 8-K.

      There were no reports on Form 8-K filed during the quarter ended June 30,
1998.


                                       -17-



                           SIGNATURES



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




                                          ACNIELSEN CORPORATION
                                               (Registrant)

Date:  August 13, 1998                    /s/ Robert J. Chrenc
                                         ------------------------------------- 
                                         Robert J. Chrenc
                                         Executive Vice President
                                          And Chief Financial Officer



Date:  August 13, 1998                    /s/ Michael S. Geltzeiler
                                         -------------------------------------
                                         Michael S. Geltzeiler
                                         Senior Vice President and Controller


                                       -18-