Document:

<PAGE>
                                                                    Exhibit 10.5

                         INTELLECTUAL PROPERTY AGREEMENT

This Intellectual Property Agreement (the "Agreement"), effective as of May 7,
2002, (the "Effective Date") is entered into by and between NETRATINGS, INC., a
Delaware corporation, having its principal place of business at 890 Hillview
Court, Milpitas, California 95035 ("NetRatings"), and JUPITER MEDIA METRIX, a
Delaware corporation with its principal place of business at 21 Astor Place, 6th
Floor New York, NY 10003 ("JMM").

                                    RECITALS

WHEREAS, this Agreement is being entered into pursuant to a Settlement Agreement
being executed concurrently herewith wherein JMM and NetRatings are comprising
any and all claims they have or may have with respect to Civil Action No.
01-193-SLR (the "Action"); and

WHEREAS, as contemplated by the Settlement Agreement and as part of the
settlement contemplated therein, the parties desire that each party shall have
rights in certain Covered Patents and certain other Intellectual Property as set
forth herein.

In consideration of the promises and mutual covenants herein contained,
NetRatings and JMM agree as follows:

                                    AGREEMENT

1.    DEFINITIONS. The following terms shall have the meanings set forth below:

      1.1 "Closing Date" shall have the meaning set forth in the Asset Purchase
Agreement that the parties are executing concurrent with the execution of this
Agreement.

      1.2 "Covered Patents" shall mean the JMM patents and patent applications
(including all patents issuing therefrom) listed in Exhibit A ("JMM Patents") as
well as any patents claiming priority, in whole or in part, to either of the
foregoing, filed in any country, including utility models and registrations and
also including any reissues, divisions, re-examinations, renewals, extensions,
provisionals, continuations, continuations-in-part or counterparts thereof.

      1.3 "Encumbrances" shall mean restrictions on or conditions to transfer or
assignment, claims, liabilities, liens, pledges, mortgages or security interests
of any kind, whether accrued, absolute, contingent, or otherwise, affecting any
of the Subject IP.

      1.4 "Intellectual Property" shall mean United States and foreign patents
and utility models and applications therefor and all reissues, divisions,
re-examinations, renewals, extensions, provisionals, continuations,
continuations-in-part and counterparts thereof (the "Patents"); (ii) rights in
inventions (whether patentable or not), improvements, trade secrets, proprietary
information, know how, and any rights in technology, invention disclosures,
technical data and customer lists, and all documentation relating to any of the
foregoing; (iii) copyrights, copyrights registrations and applications therefor,
and all other rights corresponding thereto throughout the world; (iv) industrial
designs and any registrations and applications therefor; and (v) any similar or
equivalent rights to any of the foregoing (as applicable). Notwithstanding the
foregoing, Intellectual Property will not include any rights in Trademarks.

      1.5 "PC Meter Technology" shall mean the method and software for logging
and reporting on-line activity of computer users known as "PC Meter" an all
related database systems and technologies
<PAGE>
used with such method and software, as more particularly described in Exhibit B
("PC Meter Technology").

      1.6 "Quarter" shall mean a period of three (3) consecutive calendar months
commencing upon either January 1, April 1, July 1 or October 1. "Quarterly"
shall mean once per Quarter.

      1.7 "Subject IP" shall mean the Covered Patents and PC Meter Technology,
collectively.

      1.8 "Trademarks" shall mean trade names, logos, common law trademarks and
service marks, trademark, and service mark registrations, related goodwill and
applications therefor throughout the world, as well as domain names, uniform
resource locators, other names and locators associated with the Internet, and
applications or registrations therefor.

      1.9 "Year" shall mean a twelve (12) calendar month period beginning on
January 1.

2.    ASSIGNMENT AND LICENSES.

      2.1 COVERED PATENTS.

            (a) ASSIGNMENT TO NETRATINGS. Effective upon the Closing Date, JMM
hereby assigns to NetRatings all of JMM's rights, title and interest in and to
the Covered Patents. The foregoing assignments also include the right to sue for
infringement or misappropriation of the Covered Patents and collect damages for
past as well as future infringement and/or misappropriation of the Covered
Patents.

            (b) LICENSE BACK TO JMM. In consideration for and subject to the
terms and conditions of this Agreement, including but not limited to the
payments specified in Section 3.2 (JMM Consideration), NetRatings hereby grants
to JMM for a period beginning on the Closing Date through June 30, 2005, under
all of NetRatings' rights in the Covered Patents, the non-exclusive,
non-sublicensable, royalty-bearing, limited right to exploit the Covered Patents
in any manner necessary to conduct the JMM Business (as defined in Section 6.2
(By JMM)) in the United States. The foregoing license is transferable and
assignable so long as the transferee, assignee or successor in interest
(collectively referred to as "Transferee") agrees in writing to be bound by all
the terms applicable to this license, including but not limited to Section 3.2
(JMM Consideration).

      2.2 PC METER TECHNOLOGY. JMM hereby grants to NetRatings (including any
consultants and contractors working on NetRatings' behalf), under all of JMM's
Intellectual Property in and to the PC Meter Technology, the non-exclusive,
irrevocable, perpetual, royalty-free, fully-paid up license (including the right
to sublicense through multiple tiers) to use, reproduce, distribute, publicly
perform, publicly display, prepare derivative works based upon and otherwise
exploit the PC Meter Technology in any manner (including without limitation,
combining, embedding or integrating the PC Meter Technology, or any portion
thereof, with or into any other software), in both source code and object code
form. NetRatings shall be the sole owner of all Intellectual Property in and to
any derivative works of the PC Meter Technology it creates or has created on its
behalf. NetRatings agrees that any sublicense of the PC Meter Technology shall
be pursuant to license terms that are no less protective of JMM's Intellectual
Property in and to such PC Meter Technology as those that NetRatings imposes on
licensees of its own proprietary software.

      2.3 DELIVERY. Promptly after the Closing Date, JMM shall deliver to
NetRatings, at a location and in a format specified by NetRatings: (a) a copy of
the object code and fully documented source code for all versions of the PC
Meter Technology; and (b) copies of all documents in JMM's possession or control
relating to the Covered Patents and PC Meter Technology.
<PAGE>
      2.4 RESERVATION OF RIGHTS. Except as specifically stated in this
Agreement, nothing contained in this Agreement shall be construed as conferring
on a party any license or other right, by implication, estoppel or otherwise to
any other Intellectual Property or Trademarks of the other party.

3.    PAYMENT TERMS.

      3.1 NETRATINGS CONSIDERATION. The parties acknowledge and agree that the
consideration provided for in Article 2 of the Settlement Agreement constitutes
adequate consideration for, among other things, the assignment to NetRatings of
the rights granted in Section 2.1 ("Assignment of Rights").

      3.2 JMM CONSIDERATION.

            (a) FEE. In consideration of the license granted by NetRatings to
JMM in Section 2.1(b) (License Back to JMM), JMM shall pay NetRatings the
following amounts:

                  (i) for each of the three (3) calendar months beginning on
July 1, 2002, a non-refundable, irrevocable fee of $125,000 per month, payable
in advance by the tenth (10th) day of each month;

                  (ii) for the Quarter beginning on October 1, 2002, a
non-refundable, irrevocable fee of $375,000, payable in advance by the tenth
(10th) day of the Quarter;

                  (iii) for each Year of the license's duration starting January
1, 2003, an annual fee equal to $1,500,000.00 in the first Year and $1,750,000
in the second Year, payable in advance on a Quarterly basis by the tenth (10th)
of each Quarter with each such Quarterly payment being non-refundable and
irrevocable; and

                  (iv) for the period from January 1, 2005 until June 30, 2005,
a non-refundable, irrevocable fee of $500,000 per Quarter, payable in advance by
the tenth (10th) day of the Quarter.

            (b) TAXES. JMM shall be responsible for all sales taxes, use taxes,
withholding taxes, value added taxes, import and export taxes and any other
similar taxes imposed by any United States' federal, state, provincial or local
governmental entity or any non-US government entity on the transactions
contemplated by this Agreement, excluding taxes based on NetRatings' net income.

4.    PROSECUTION, MAINTENANCE AND ENFORCEMENT OF PATENTS.

      4.1 PROSECUTION RIGHTS. On and after the Closing Date, the expenses for
prosecuting each Covered Patent (including without limitation any taxes,
annuities and maintenance fees for any pending application and/or issued patent
corresponding to each Covered Patent), and for the issuance of the respective
patent shall be borne by NetRatings. JMM agrees to furnish NetRatings with all
documents and other assistance, as such may be necessary, for the prosecution of
each application. JMM agrees that it will not challenge the validity or
enforceability of the Covered Patents, and will not assist, assign or cooperate,
directly or indirectly, in (i) challenging the validity or enforceability of any
claims of the Covered Patents in any action or (ii) defending any third party in
an infringement action asserted by NetRatings related to the Covered Patents.

      4.2 NOTIFICATION OF INFRINGEMENT. JMM shall promptly inform NetRatings of
any suspected infringement of any of the Covered Patents by a third party.
<PAGE>
      4.3 FURTHER ASSURANCES. JMM shall perform all acts deemed necessary or
desirable by NetRatings to permit and assist NetRatings, at NetRatings' expense,
in perfecting and enforcing its rights throughout the world in the Covered
Patents. Such acts may include, but are not limited to, execution of documents
and assistance or cooperation in the registration and enforcement, including
litigation, of the Covered Patents or other legal proceedings. Concurrent with
the execution of this Agreement, NetRatings shall receive from JMM assignments
substantially in the form of Exhibit C-1 ("Patent Assignment") with respect to
the Covered Patents, duly executed on behalf of JMM by an officer and notarized,
and in a form acceptable for recording with the United States Patent and
Trademark Office and any patent office in any other jurisdiction, as applicable.
In the event that NetRatings is unable for any reason whatsoever to secure a
signature to any document it believes is reasonably required in order to apply
for or execute any paper with respect to the Covered Patents (including
improvements, renewals, extensions, continuations, divisions or continuations in
part thereof), JMM hereby irrevocably designate and appoint NetRatings and its
duly authorized officers and agents as NetRatings' agents and its
attorneys-in-fact to act for and on its behalf and instead of it, to execute and
file any such paper and to do all other lawfully permitted acts to further the
prosecution and issuance of patents or other rights therein in the Covered
Patents with the same legal force and effect as if executed by NetRatings.

      4.4 DISCLOSURE OF INFORMATION. JMM will not disclose to any third party
any information it has obtained in connection with the prosecution of the
Covered Patents. Notwithstanding the foregoing, if JMM is served with a subpoena
or court order requiring the disclosure of information relating to any Covered
Patent, JMM shall promptly notify NetRatings and cooperate, at NetRatings'
expense, in obtaining enough time for NetRatings to object to such disclosure,
move for a protective order, seek to limit such production of information and/or
to quash the subpoena.

5.    WARRANTIES.

      5.1 OWNERSHIP. JMM owns all the Subject IP, free and clear of all
Encumbrances and any exclusive licenses or rights to use the same, and JMM is
not a joint owner of any portion of the Subject IP with any third party. All
designs, drawings, specifications, source code, object code, documentation, flow
charts and diagrams incorporated, embodied or reflected in any Subject IP at any
stage of its development were written, developed and created solely and
exclusively by employees of JMM without the assistance of any third party.

      5.2 DISCLOSURE. Exhibits A ("JMM Patents") contain an accurate and
complete list of all jurisdictions in which each Covered Patent has been issued
or registered or in which any such application for such issuance or registration
has been filed (collectively, the "Intellectual Property Registrations").

      5.3 LICENSES TO AND FROM THIRD PARTIES. As of the Effective Date, Section
5.3 of Exhibit D ("Disclosure Schedule") attached hereto (the "Disclosure
Schedule") lists (i) licenses, sublicenses or any other agreements pursuant to
which any third party is authorized to use any Covered Patents ("Third Party
Out-Bound Licenses") and (ii) all licenses, sublicenses and other agreements
with third parties (the "Third Party In-Bound Licenses") to which JMM is a party
and pursuant to which JMM is authorized to use any Intellectual Property owned
by a third party and which is used by JMM in the manufacture of, incorporated in
or forms a part of any Covered Patents or PC Meter Technology. To the knowledge
of JMM, no third party subject to a Third Party Out-Bound License is in breach
or default of such Third Party Out-Bound License.

      5.4 NO CONFLICTS OR CONSENTS. The execution and delivery of this
Agreement, compliance with its terms and the consummation of the transactions
contemplated hereby do not and will not conflict with, or result in any
violation or breach of, or default (with or without notice or lapse of time or
both) or give rise to any right, license or Encumbrance relating to the Subject
IP, or right of termination,
<PAGE>
cancellation or acceleration of any Subject IP, or the loss or Encumbrance of
any Subject IP or material benefit related thereto, or result in or require the
creation, imposition or extension of any Encumbrance upon any Subject IP or
otherwise impair the right of NetRatings, its subsidiaries or affiliated
companies, or its customers to use the Subject IP as contemplated by this
Agreement. Except as set forth in Section 5.4 of the Disclosure Schedule, no
consent, approval, order or authorization of, or registration, declaration or
filing with, any third party or any governmental authority is required to be
obtained on the part of JMM to permit the consummation of the transactions
contemplated by this Agreement.

      5.5 NO NOTICE OF CLAIMS. JMM (i) has not received notice that it has been
sued in any suit, action or proceeding which involves a claim of infringement of
any portion of the Subject IP; and (ii) has no knowledge of any claim
challenging or questioning the validity or effectiveness of any license or
agreement relating to any Subject IP or Third Party In-Bound License. Except
with respect to the Action, there is no outstanding order, writ, injunction,
decree, judgment or stipulation by or with any court, administrative agency or
arbitration panel regarding patent, copyright, trade secret, trademark, trade
name, mask work right or other claims relating to the Subject IP to which JMM is
a party or by which it is bound.

      5.6 PROTECTION OF CONFIDENTIAL INFORMATION. JMM has taken all reasonable
measures and precautions to protect and maintain the confidentiality, secrecy
and value of all material trade secrets or confidential information included in
the Covered Patents (except whose value would not be impaired by disclosure).
Without limiting the generality of the foregoing, all current and former
employees of JMM who are or were involved in, or who have contributed to, the
creation or development of any portion of the Covered Patents have executed and
delivered to JMM an agreement that is substantially identical to the form of
confidential information and invention assignment agreement previously delivered
by JMM to NetRatings. No current or former employee, officer, director,
stockholder, consultant or independent contractor has any right, claim or
interest in or with respect to any Covered Patent.

      5.7 MAINTENANCE FEES. Section 5.7 of the Disclosure Schedule lists all
Intellectual Property Registrations for which maintenance fees and/or annuities
are due (and have not yet been paid) in any jurisdiction in which such
Intellectual Property Registration has been filed at any time through the end of
the first two (2) full calendar quarters after the Closing Date or for which any
action must be taken under the Patent Cooperation Treaty or in any jurisdiction
in which such Intellectual Property Registration has been filed in order to
preserve any rights in or to the Covered Patents at any time in such period.

6.    TERMINATION OF LICENSE BACK

      6.1 BY NETRATINGS. In the event that JMM breaches any material provision
of this Agreement and fails to cure such breach within thirty (30) days after
receiving written notice thereof from NetRatings, the license back granted to
JMM pursuant to Section 2.1(b) (License Back to JMM) shall be deemed terminated
effective upon the expiration of such thirty (30) day period. Within thirty (30)
days after the effective termination of such license back, JMM shall pay
NetRatings all monthly and Quarterly payments accrued through the effective
termination date of such license.

      6.2 BY JMM. In the event JMM (or its Transferee) intends to cease the
conduct of the JMM Business, and only in such event, JMM (or its Transferee) may
terminate the license it received pursuant to Section 2.1(b) (License Back to
JMM), together with all corresponding payment obligations hereunder, upon thirty
(30) days written notice to NetRatings (the "Notice Period"). Notwithstanding
any termination of such license to JMM, unless prior to the commencement of the
next succeeding month or Quarter, as applicable, (i) the Notice Period expires
and (ii) JMM (or its Transferee) has certified in writing to NetRatings that it
has ceased the conduct of the JMM Business, JMM shall be liable for the payment
corresponding to such succeeding month or Quarter, as specified in Section
3.2(a) (Fee). Under
<PAGE>
no circumstances shall JMM receive any refund of any monthly or Quarterly
payments paid through the effective termination date of the license. For
purposes of this Agreement, "JMM Business" shall mean the provision of research,
advisory and measurement products and services based primarily on the collection
of internet audience measurement data by JMM (or any Transferee) to persons who
are either (a) customers of JMM on the date of this Agreement who are not also
customers of any Transferee or its affiliates on the date of this Agreement
(whether the revenue is derived from existing contracts, extensions or renewals
or modifications thereof, or from new contracts with the same customers) or (b)
customers to whom JMM (including any Transferee) provides such products and
services with the use of the Covered Patent.

7.    MISCELLANEOUS.

      7.1 JOINTLY NEGOTIATED. The parties hereby agree that this Agreement has
been jointly negotiated and drafted by the parties and that it shall not be
construed either for or against either party based upon the party who drafted
any part of it.

      7.2 GOVERNING LAW. This Agreement, any dispute arising under or which is
related to this Agreement (whether in contract, tort or otherwise), and the
validity, performance and interpretation of this Agreement shall be governed by
and construed in all respects under, the laws of the United States of America
and the State of Delaware without giving effect to its conflicts of law
principles.

      7.3 NO WAIVER. No term or provision hereof will be considered waived by
either party, and no breach excused by either party, unless such waiver or
consent is in writing signed on behalf of the party against whom the waiver is
asserted. No consent by either party to, or waiver of, a breach by either party,
whether express or implied, will constitute a consent to, waiver of, or excuse
of any other, different, or subsequent breach by either party.

      7.4 ASSIGNMENT. Nothing in this Agreement shall be deemed to prohibit or
otherwise limit NetRatings' ability to assign any rights or delegate any
obligations under this Agreement. This Agreement shall benefit and bind the
permitted successors and assigns of NetRatings.

      7.5 NOTICES. All notices required to be given under this Agreement shall
be in writing and delivered to the parties at their respective addresses set
forth below (or such other address as specified by either party in accordance
with the provisions of this section) by (i) hand delivery, (ii) nationally
recognized overnight courier, (iii) mailed postage prepaid by certified or
registered mail, return receipt requested, or (iv) facsimile transmission with
verification of receipt, and will be deemed to be effective the day of delivery
by hand or overnight courier, the day of transmission if sent by facsimile, or
three (3) days after mailing if sent by mail:
<PAGE>
If to NetRatings:             NetRatings, Inc.
                              890 Hillview Court
                              Milpitas, CA 95035
                              Attention:  General Counsel
                              Facsimile No.: 408-586-0208

With a Copy to:               Gray Cary Ware & Freidenrich LLP
                              400 Hamilton Avenue
                              Palo Alto, CA 94301
                              Attention:  Mark F. Radcliffe, Esq.
                              Facsimile No.:  650-833-2001

If to JMM:                    Jupiter Media Metrix, Inc.
                              21 Astor Place, 6th Floor
                              New York, NY 10003
                              Attention:  Chief Executive Officer
                              Facsimile No.:  917-534-6809
                              Attention:  General Counsel

With a Copy to:               Brobeck, Phleger & Harrison LLP
                              1633 Broadway, 47th Floor
                              New York, NY 10019
                              Attention:  Richard H. Gilden, Esq.
                              Facsimile No.:  212-586-7878

      7.6 SEVERABILITY. In the event that any court or arbitrator having
jurisdiction shall determine that any provision contained in this Agreement
shall be unreasonable or unenforceable in any respect, then such provision shall
be deemed limited to the extent that such court or arbitrator deems it
reasonable and enforceable, and as so limited shall remain in full force and
effect. In the event that such court or arbitrator shall deem any such provision
wholly unenforceable, the remaining provisions of this Agreement shall
nevertheless remain in full force and effect.

      7.7 INDEPENDENT CONTRACTORS. In the course of performing under this
Agreement, each of the parties will operate as, and have the status of, an
independent contractor and will not act as or be an agent, partner, co-venturer,
employee or fiduciary of the other party. Neither party will have the right or
authority to assume or create any obligations or to make any representations or
warranties on behalf of any other party, whether express or implied, or to bind
the other party in any respect whatsoever.

      7.8 SECTION HEADINGS. The section headings appearing in this Agreement are
inserted only as a matter of convenience and in no way define, limit, construe
or describe the scope or extent of such section or in any way affect this
Agreement. The plural shall be deemed to include the singular, and the singular
shall be deemed to include the plural.

      7.9 ATTORNEYS' FEES. In the event any proceeding or lawsuit is brought
against any party to this Agreement in connection with this Agreement, the
prevailing party will be entitled to recover its costs and expenses, including
expert witness' fees and attorneys' fees.

      7.10 LIMITATION OF LIABILITY. IN NO EVENT SHALL EITHER PARTY BE LIABLE TO
THE OTHER PARTY FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY
<PAGE>
DAMAGES ARISING OUT OF ANY PERFORMANCE OF THIS AGREEMENT AND NEITHER PARTY'S
SUPPLIERS SHALL BE LIABLE FOR ANY DAMAGES INCLUDING, BUT NOT LIMITED TO,
SPECIAL, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES. ALL OF THE ABOVE LISTED
LIMITATIONS APPLY REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT
(INCLUDING NEGLIGENCE), STRICT PRODUCT LIABILITY OR OTHERWISE, EVEN IF A PARTY
HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

      7.11 SCOPE OF AGREEMENT; AMENDMENT. The parties hereto acknowledge that
each has read this Agreement and all Exhibits hereto, understands it, and agrees
to be bound by its terms. The parties further agree that this Agreement is the
complete and exclusive statement of agreement and supersedes all prior or
contemporaneous proposals (oral or written), understandings, representations,
agreements, conditions, warranties, covenants, and other communications between
the parties relating hereto relating to the subject matter of this Agreement.
This Agreement may be amended only by a subsequent writing that specifically
refers to this Agreement and is signed by both parties, and no other act,
document, usage, or custom shall be deemed to amend this Agreement. If there is
any conflict between the terms of this Agreement and any pre-existing
non-disclosure agreement between the parties, the terms of this Agreement shall
control.

      IN WITNESS WHEREOF, the parties hereto have signed this Agreement by their
authorized representatives.

Agreed to:                                 Agreed to:

NETRATINGS, INC.                           JUPITER MEDIA METRIX

By:  /s/  William Pulver                   By:  /s/  Robert Becker

Name:  William Pulver                      Name:  Robert Becker

Title:  President and Chief Executive      Title:  President and Chief Executive
        Officer                                    Officer

Date:  May 7, 2002                         Date:  May 7, 2002
<PAGE>
                                    EXHIBIT A

                                   JMM Patents

U.S. Patent No. 6,115,680
U.S. Patent No. 5,676,510
<PAGE>
                                    EXHIBIT B

                               PC Meter Technology

"PC METER TECHNOLOGY" shall mean all legal and equitable rights, title and
interest JMM has in any and all intellectual property, trade secrets and
proprietary information ,including know-how and copyrights regarding JMM's
systems and methods for logging and reporting on-line activity of computer
users, including without limitation (a) the full and complete source code, to
the extent it exists, for all versions and for all platforms of the software
known as of the Closing Date as "PC Meter"; and (b) the full and complete source
code for all versions of JMM's database systems, and related technologies, used
with the PC Meter software.
<PAGE>
                                   EXHIBIT C-1

                                Patent Assignment

                           PATENT ASSIGNMENT AGREEMENT

      WHEREAS, the undersigned, Jupiter Media Metrix, Inc., a Delaware
corporation having a place of business at 21 Astor Place, 6th Floor, New York,
NY 10003 ("Assignor") is the owner of the entire right, title and interest in
the patent properties listed on Schedule A (the "Assigned Patent Properties");
and

      WHEREAS, NetRatings, Inc., a Delaware corporation having a place of
business at 890 Hillview Court, Milpitas, California 95035 ("Assignee"), is
desirous of acquiring the Assigned Patent Properties and any rights in the
Assigned Patent Properties for good and valuable consideration set forth in the
Intellectual Property Agreement executed between Assignor and Assignee dated May
7, 2002.

      NOW, THEREFORE, in consideration of good and valuable consideration
acknowledged by Assignor to have been received in full from Assignee:

      1. Effective upon execution, Assignor does hereby sell, assign, transfer
and convey unto Assignee, all of their right, title and interest together with
the benefits and privileges in and to all inventions and discoveries set forth
in the Assigned Patent Properties;

      2. Assignor hereby covenants and agrees to cooperate with Assignee to
enable Assignee to obtain, sustain, enforce and enjoy to the fullest extent all
right, title and interest herein conveyed in any country. Such cooperation by
Assignor shall include production of pertinent facts and documents, giving of
testimony, execution of petitions, oaths, specifications, declarations or other
papers, and other assistance all to the extent deemed reasonably necessary or
desirable by Assignee, (a) for perfecting in Assignee the right, title and
interest herein conveyed; (b) for filing and prosecuting substitute, divisional,
continuing or additional applications covering the Assigned Patent Properties;
(c) for filing and prosecuting applications for re-issuance of any of the
Assigned Patent Properties; (d) for interference or other priority proceedings
involving the Assigned Patent Properties; and (e) for legal proceedings
involving the Assigned Patent Properties for infringement actions and court
actions; provided, however, that the expense incurred by Assignor in providing
such cooperation shall be paid for by Assignee. In the event that Assignee is
unable for any reason to secure Assignor's signature to any document required to
apply for or execute any patent applications or patents (including improvements,
renewals, extensions, continuations, divisions or continuations in part
thereof), Assignor hereby irrevocably designates and appoints Assignee and its
duly authorized officers and agents as Assignor's agent and attorney-in-fact to
act for and in their behalf, and instead of Assignor, to execute and file any
such applications and to do all other lawfully permitted acts to further the
perfection, prosecution and issuance of patents or other rights therein with the
same legal force and effect as if executed by Assignor.

      3. Assignor warrants that it has not knowingly conveyed and shall not
convey to others any rights in said inventions, discoveries, applications,
patents or Assigned Patent Properties; and warrants it has good right to assign
the same to Assignee without encumbrance.

      4. The terms and covenants of this Patent Assignment Agreement shall inure
to the benefit of Assignee, its successors and assigns, and shall be binding
upon Assignor and its successors and assigns.
<PAGE>
IN WITNESS WHEREOF, Assignor has executed and delivered this instrument to
Assignee effective the 7th day of May, 2002.

ASSIGNOR:   Jupiter Media Metrix, Inc.

Today's
Date: May 7, 2002         By:  /s/  Robert Becker
                                    Title: President and Chief Executive Officer

STATE OF CALIFORNIA       )
                          )  ss.
COUNTY OF                 )

      On ______________________ before me, ______________________, Notary
Public, personally appeared ____________________________, personally known or
proved to me on the basis of satisfactory evidence to be the person whose name
is subscribed tot he within instrument and acknowledged to me that he/she
executed the same in his/her authorized capacity and that by his/her signature
on the instrument the person, or the entity upon behalf of which the person
acted, executed the instrument.

         Witness my hand and official seal.

                           _____________________________________
         Notary Public
<PAGE>
                                   Schedule A

                           Assigned Patent Properties

U.S. Patent No. 6,115,680
U.S. Patent No. 5,676,510<PAGE>
                                                                    Exhibit 10.6
================================================================================
                            ASSET PURCHASE AGREEMENT

                                  BY AND AMONG

                                NETRATINGS, INC.

                                       AND

                            JUPITER MEDIAMETRIX, INC.

                                       AND

                               CERTAIN AFFILIATES

                          OF JUPITER MEDIA METRIX, INC.

                             Dated as of May 7, 2002
================================================================================
<PAGE>
                            ASSET PURCHASE AGREEMENT

      THIS ASSET PURCHASE AGREEMENT dated as of May 7, 2002 is by and among
NetRatings, Inc., a Delaware corporation ("Buyer") and Jupiter Media Metrix,
Inc., a Delaware corporation ("Seller") and the affiliates of Seller named on
the signature page hereto (each a "Seller Sub" and collectively the "Seller
Subs").

                                   WITNESSETH:

      WHEREAS, Buyer desires to acquire, and Seller desires to sell, certain
assets, properties and rights of Seller and certain of its Affiliates, as the
case may be, relating to Seller's international non-United States provision of
research, advisory and measurement products and services based primarily on the
collection of internet audience measurement data and application usage (the
"Business"), but excluding all other assets, properties and rights of Seller,
including without limitation, those used in connection with the Retained
Business (as defined below), upon the terms and subject to the conditions set
forth in this Agreement (the "Acquisition"); and

      WHEREAS, the Board of Directors of Seller has determined that it is in the
best interests of Seller to sell such assets, properties and rights to Buyer,
upon the terms and subject to the conditions set forth in this Agreement.

      NOW, THEREFORE, in consideration of the representations, warranties,
covenants and agreements set forth herein, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
parties hereto hereby agree as follows:

                                   ARTICLE I

                                   DEFINITIONS

      1.01 DEFINITIONS.

      The following terms, as used herein, have the following meanings:

      "Acquisition" is defined in the first recital of the preamble to this
Agreement.

      "Affiliate" means, with respect to any Person, any Person directly or
indirectly controlling, controlled by or under common control with such other
Person.

      "Ancillary Agreements" is defined in Section 2.07 of this Agreement.

      "Assignment of Intellectual Property Agreement" means the Assignment of
Intellectual Property Agreement among Buyer and Seller and any relevant Seller
Sub, in substantially the form attached hereto as Exhibit A.

      "Assumed Liabilities" is defined in Section 2.03 of this Agreement.
<PAGE>
      "Benefit Arrangement" means an employment, severance or similar contract,
arrangement or policy and each plan or arrangement providing for severance pay,
life insurance or health care coverage (including any self-insured
arrangements), sabbatical or other leave of absence programs, flexible spending
accounts or cafeteria benefit programs under Code Section 125, workers'
compensation, disability benefits, dependent care benefits, supplemental
unemployment benefits, vacation benefits, pension or retirement benefits or
providing for deferred compensation, profit-sharing, cash or stock bonuses,
stock options, stock appreciation rights, stock purchase or other forms of
incentive compensation or post-retirement life insurance, health care or
disability coverage that (i) is not an Employee Plan and (ii) is maintained or
contributed to by Seller or any of their Affiliates and any equivalent
arrangements maintained by the Seller or any Seller Sub or the Business with
respect to employees.

      "Bill of Sale, Assignment and Assumption Agreement" means the Bill of
Sale, Assignment and Assumption Agreement among Buyer and Seller, in
substantially the form attached hereto as Exhibit B.

      "Business" is defined in the first recital of the preamble to this
Agreement.

      "Buyer" is defined in the preamble to this Agreement.

      "Cash Portion" is defined in Section 2.06 of this Agreement.

      "Closing" is defined in Section 2.07 of this Agreement.

      "Closing Date" means the date of the Closing.

      "COBRA" is defined in Section 2.04 of this Agreement.

      "Code" means the Internal Revenue Code of 1986, as amended.

      "Confidentiality Agreement" means the confidentiality agreement between
Buyer and Seller dated February 22, 2002.

      "Contracts" means all contracts, agreements, leases, licenses,
commitments, sales and purchase orders and other instruments listed on Schedule
2.01.

      "Contract Value" means the revenue value of a given customer Contract for
the time period from the date following the Closing Date through the term of
such Contract (excluding any renewal periods, the "Remaining Term") calculated
as the total revenues attributable to the Contract (or the current term of the
Contract if it has been in effect for more than one term) multiplied by a
fraction, the numerator of which is the total number of days in the Remaining
Term and the denominator of which is the total number of days in the term of the
Contract (exclusive of any renewals and any prior terms if it has been in effect
for more than one term).

      "Employee Plan" means each "employee benefit plan" of Seller, as such term
is defined in Section 3(3) of ERISA, that (i) is subject to any provision of
ERISA and (ii) is maintained or contributed to by either Seller or any of its
ERISA Affiliates, as the case may be and any equivalent "employee benefit plans"
of Seller Subs or the Business.

                                       3
<PAGE>
      "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended and any equivalent foreign laws applicable to the Business.

      "ERISA Affiliate" of any entity means any other entity that, together with
such entity, would be treated as a single employer under Section 414(b), (c),
(m) or (o) of the Code.

      "Excluded Assets" is defined in Section 2.02 of this Agreement.

      "Excluded Liabilities" is defined in Section 2.04 of this Agreement.

      "Excluded Agreement" means that certain License Agreement dated as of
March 23, 2001, by and between Jupiter Media Metrix, Inc. and Media Metrix Pty
Limited, an Australian limited liability company.

      "Excluded Territories" means Canada and Switzerland.

      "Intellectual Property" means any or all of the following related to the
Purchased Assets or subject to the Assignment of Intellectual Property
Agreement: (A) U.S. and foreign patents, patent applications, patent disclosures
and all related continuation, continuation-in-part, divisional, reissue,
renewal, revival, provisional, re-examination, utility, model, extensions,
certificate of invention and design patents, patent applications, registrations
and applications for registrations, (B) trademarks, service marks, trade dress,
logos, tradenames, service names and corporate names and registrations and
applications for registration thereof throughout the world ("Trademark Rights"),
Internet domain names and registrations and applications for registrations
thereof, (C) copyrights and copyrightable works, including, without limitation,
all rights of authorship, use, publication, reproduction, distribution,
performance, transformation, rights of ownership of copyrightable works and all
rights to register and obtain renewals and extensions of registrations, together
with all other interests accruing by reason of international copyright, (D) all
inventions (whether patentable or not), invention disclosures, improvements,
trade secrets, proprietary information, know how, technology, ideas,
manufacturing and operating specifications, formulae, hardware, processes,
technical data, computer software programs and applications in both source and
object code form data, sui generis database rights, and statistical models, and
all documentation relating to any of the foregoing, (E) trade secrets and
confidential business information, whether patentable or nonpatentable and
whether or not reduced to practice, know-how, panel creation and maintenance,
product processes and techniques, research and development information,
copyrightable works, financial, marketing and business data, pricing and cost
information, business and marketing plans and customer and supplier lists and
information, (F) other proprietary rights relating to any of the foregoing
throughout the world (including without limitation associated goodwill and
remedies against infringements thereof and rights of protection of an interest
therein under the laws of all jurisdictions) and (G) copies and tangible
embodiments thereof.

      "License Agreement" is defined in Section 3.09 of this Agreement.

      "Licensed Intellectual Property" is defined in Section 3.09 of this
Agreement.

      "Lien" means, with respect to any asset, any mortgage, lien (including any
tax lien), pledge, charge, security interest or encumbrance of any kind in
respect of such asset.

                                       4
<PAGE>
      "Material Adverse Effect" means any change in or effect on the Business of
Seller or the Purchased Assets that, individually or in the aggregate (taking
into account all other such changes or effects), is, or is reasonably likely to
be, materially adverse to the business, assets, condition (financial or
otherwise) or results of operations of the Business taken as a whole.

      "Option Assets" means those assets and rights listed on Schedule 2.01(a).

      "Permitted Liens" means any of the following liens: (i) liens for Taxes,
(ii) liens for inchoate mechanics' and materialmen's liens for construction in
progress and workmen's, repairmen's, warehousemen's and carriers' liens arising
in the ordinary course of the Business, or (iii) liens and imperfections of
title the existence of which would not materially adversely affect the use of
the property subject thereto.

      "Person" means an individual, corporation, partnership, association, trust
or other entity or organization, including a government or political subdivision
or an agency or instrumentality thereof.

      "Purchase Price" is defined in Section 2.06 of this Agreement.

      "Purchased Assets" means (a) those assets, properties and rights listed on
Schedule 2.01, and (b) such of the Option Assets as are acquired by Buyer under
Section 2.01(b) hereof.

      "Representatives" means Seller's or Buyer's respective officers,
directors, employees, accountants, counsel, consultants, advisors, agents and
Affiliates.

      "Retained Business" means all of Seller's existing businesses other than
the Purchased Assets, including without limitation, Seller's products and
services, or Seller's Internet and e-commerce research and advisory consulting
products, services and events.

      "Seller" is defined in the preamble to this Agreement.

      "Seller Sub" is defined in the preamble to this Agreement.

      "Software Programs" is defined in Section 3.10 of this Agreement.

      "Tax" means (A) any net income, alternative or add-on minimum tax, gross
income, gross receipts, sales, use, ad valorem, transfer, franchise, profits,
license, withholding, payroll, employment, excise, severance, stamp, occupation,
premium, property, environmental or windfall profit tax, custom, duty or other
tax, governmental fee or other like assessment or charge of any kind whatsoever,
together with any interest or any penalty, addition to tax or additional amount
imposed by any governmental, regulatory or administrative entity or agency
responsible for the imposition of any such tax (domestic or foreign), (B) any
liability for the payment of any amounts of the type described in (A) as a
result of being a member of an affiliated, consolidated, combined, unitary or
other group for any Taxable period and (C) any liability for the payment of any
amounts of the type described in (A) or (B) as a result of any express or
implied obligation to indemnify any other person.

                                       5
<PAGE>
                                   ARTICLE II

                                PURCHASE AND SALE

      2.01 PURCHASE AND SALE.

      (a) On the terms and subject to the conditions of this Agreement, Seller
and the Seller Subs shall sell, convey, transfer, assign and deliver to Buyer,
and Buyer shall purchase and accept from Seller and such Seller Subs, as the
case may be, on the Closing Date, all right, title and interest of Seller and
such Seller Subs in and to the Purchased Assets, excluding the Option Assets.

      (b) Upon written notice from Buyer at any time within ninety days of the
Closing Date and to the extent that the transfer of the Option Assets is
permitted under applicable law, for no additional consideration to Seller,
Seller shall convey, transfer, assign and deliver to Buyer, and Buyer shall
purchase and accept from Seller and such Seller Subs, as the case may be, all
right, title and interest of Seller and such Seller Subs in and to the Option
Assets.

      2.02 EXCLUDED ASSETS. Buyer expressly understands and agrees that all
assets, properties and rights of Seller and the Seller Subs not listed on
Schedule 2.01 (the "Excluded Assets") shall be excluded from the Purchased
Assets, including without limitation:

            (i) all cash and cash equivalents (including all bank accounts),
marketable securities and prepaid expenses;

            (ii) all intercompany receivables other than receivables listed on
Schedule 2.01;

            (iii) all corporate records (including minute books and stock
ledgers), tax returns and financial records except as otherwise noted on
Schedule 2.01;

            (iv) any permits which may not be transferred without the consent,
novation, waiver or approval of a third person or entity and for which such
consent, novation, waiver or approval has not been obtained;

            (v) all insurance policies;

            (vi) any refunds, credits, prepayments or overpayments with respect
to Taxes paid or accrued by Seller; and

            (vii) all assets of any Employee Plans and Benefit Arrangements.

      2.03 ASSUMPTION OF LIABILITIES. On the Closing Date, Buyer shall assume
and agree to perform all of the obligations of Seller and Seller Subs, as the
case may be, set forth in the Contracts (other than liabilities or obligations
attributable to any failure by Seller, any Seller Sub or any other party to such
Contracts to comply with the terms thereof and claims based on data provided or
work product and services delivered under such Contracts prior to the Closing
Date), but only to the extent such obligations relate to periods on or after the
Closing Date (the

                                       6
<PAGE>
"Assumed Liabilities"). Buyer shall not assume nor be liable for any liabilities
of Seller, any Seller Sub or any of their respective Affiliates other than the
Assumed Liabilities.

      2.04 EXCLUDED LIABILITIES. All liabilities of Seller, the Seller Subs and
their respective Affiliates other than the Assumed Liabilities (collectively,
the "Excluded Liabilities") shall be retained by them and they shall pay and
satisfy them in the ordinary course, including but not limited to:

            (i) any obligation or liability for Tax arising from the operation
of the Business or any other Tax for which Seller, the Seller Subs and their
respective Affiliates may be liable or any sale or transfer tax related to the
Acquisition for which Buyer may be liable;

            (ii) any liabilities or obligations under any Employee Plans and
Benefit Arrangements;

            (iii) any liabilities arising prior to the Closing Date pertaining
to any Purchased Assets or the Business;

            (iv) any liabilities or obligations for continued health care
coverage for any M&A Qualified Beneficiary (as defined in Treasury Regulation
Section 54.4980 B-9, Q&A 4(a) under Code Section 4980B ("COBRA")) or under any
equivalent foreign laws;

            (v) any liabilities arising out of any audits conducted after the
Closing by any governmental authority, insurer, licensor, licensors' association
or other party regarding Seller's pre-closing activities;

            (vi) any liability or obligation relating to an Excluded Asset.

            (vii) any intercompany liabilities (including without limitation any
payables or amounts categorized as due to/from in the Seller's balance sheet or
accounting records);

            (viii) any liability to employees for claims for matters occurring
prior to the Closing Date, including but not limited to claims by former
employees regarding sales of Seller's common stock;

            (ix) any liabilities or obligations attributable to any failure by
Seller or any other party to such Contracts to comply with the terms thereof and
claims based on data provided or work product and services delivered under such
Contracts prior to the Closing Date;

            (x) any violation of law by Seller, any Seller Sub, or any of their
respective Affiliates related to the conduct of the Business, performance of the
Contracts or ownership or operation of the Purchased Assets;

            (xi) any obligation to refund any customer for deposits or prepaid
revenue as described in Section 2.08.

                                       7
<PAGE>
      2.05 ASSIGNMENT OF CONTRACTS AND RIGHTS. Seller, the Seller Subs and Buyer
will use their commercially reasonable efforts (but without any payment of money
by Seller or Buyer) to obtain the consent of the other parties to any contract,
Purchased Asset or claim or right or any benefit arising thereunder for the
assignment thereof to Buyer as Buyer may request. If such consent is not
obtained, or if an attempted assignment thereof would be ineffective or would
adversely affect the rights of Seller thereunder so that Buyer would not in fact
receive all such rights, Seller, the Seller Subs and Buyer will cooperate in a
mutually agreeable arrangement under which Buyer would obtain the benefits and
assume the obligations thereunder in accordance with this Agreement, including
subcontracting, sub-licensing, or subleasing to Buyer, or under which Seller and
the Seller Subs, as the case may be, would enforce for the benefit of Buyer,
with Buyer assuming Seller's obligations, any and all rights of Seller and the
Seller Subs, as the case may be, against a third party thereto. Seller will
promptly pay to Buyer when received all monies received by Seller and the Seller
Subs, as the case may be, under any Purchased Asset or any claim or right or any
benefit arising thereunder, except to the extent the same represents an Excluded
Asset.

      2.06 PURCHASE PRICE; ALLOCATION OF PURCHASE PRICE. The purchase price for
the Purchased Assets shall be equal to the sum of $2,000,000 (the "Cash
Portion") and the amount of the Assumed Liabilities less the amount of any sales
or transfer taxes due upon the Acquisition.

      2.07 CLOSING. The closing of the Acquisition (the "Closing") hereunder
shall take place at the offices of Seller, 21 Astor Place, New York, NY 10003 on
the date hereof, or at such other time or place as Buyer and Seller may agree
(the "Closing Date"). At the Closing:

            (a) Buyer shall deliver to Seller the Cash Portion by wire transfer
of immediately available funds to the account or accounts designated by Seller
to Buyer on or prior to the Closing Date;

            (b) Seller and the Seller Subs which are transferring any of the
Purchased Assets and Buyer shall enter into the Bill of Sale, Assignment and
Assumption Agreement and [the Assignment of Intellectual Property Agreement]
(collectively, the "Ancillary Agreements"), and Seller and the Seller Subs which
are transferring any of the Purchased Assets shall deliver to Buyer such deeds,
bills of sale, endorsements, consents, assignments and other good and sufficient
instruments of conveyance and assignment as the parties and their respective
counsel shall deem reasonably necessary or appropriate to vest in Buyer all
right, title and interest in, to and under the Purchased Assets;

            (c) Buyer shall deliver to Seller copies, certified by the Secretary
of Buyer, of resolutions duly adopted by the Board of Directors of Buyer
authorizing the execution, delivery and performance of this Agreement and the
transactions contemplated hereby.

            (d) Seller and the Seller Subs shall deliver to Buyer copies,
certified by the Secretary of each of Seller and the Seller Subs, of resolutions
duly adopted by the Boards of Directors of Seller and the Seller Subs, as the
case may be, authorizing the execution, delivery and performance of this
Agreement and the transactions contemplated hereby.

                                       8
<PAGE>
            (e) Seller and the Seller Subs and Buyer shall also execute and
deliver all such instruments, documents and certificates as may be reasonably
requested by the other party that are necessary, appropriate or desirable for
the consummation at the Closing of the transactions contemplated by this
Agreement.

      2.08 CERTAIN CUSTOMER OBLIGATIONS. Buyer and Seller agree that Buyer shall
not be liable for the return of any deposit or refund of any prepaid amounts
under any customer Contract if the customer shall seek to terminate the contract
within 6 months of the Closing Date. The Seller or relevant Seller Sub shall,
upon notice from Buyer, remit to such customer such amounts of deposits or
prepaid amounts as would be due to such customer upon the customer's termination
of the Contract, refusal to accept the assignment of the Contract as provided in
this Agreement or refusal to accept the substitution of equivalent Buyer
products and services for those products of Seller provided for in the customer
Contract. Buyer may choose to refund such customer for such amounts in which
case the Seller shall promptly remit such amounts directly to Buyer upon receipt
of notice from Buyer that it has paid such amounts in such circumstances. Buyer
agrees to use commercially reasonable efforts to fulfill its obligations assumed
under the customer Contracts.

                                  ARTICLE III

            REPRESENTATIONS AND WARRANTIES OF SELLER AND SELLER SUBS

      Seller hereby represents and warrants to Buyer, subject to the exceptions
specifically disclosed in writing in the corresponding sections or subsections
of the Seller Disclosure Schedule or in any other section or subsection of the
Seller Disclosure Schedule if it is reasonably apparent that such disclosure
applies that:

      3.01 ORGANIZATION AND QUALIFICATION. Seller and each of the Seller Subs
have been duly organized and are validly existing and in good standing under the
laws of its jurisdiction of incorporation and has the requisite corporate power
and authority to own, lease and operate its properties and to carry on their
business as such business is now being conducted.

      3.02 CORPORATE AUTHORIZATION. The execution, delivery and performance by
Seller and the Seller Subs which are transferring any of the Purchased Assets,
of this Agreement and each of the Ancillary Agreements to which they are
parties, and the consummation by Seller and Seller Subs of the transactions
contemplated hereby and thereby are within Seller's and each of such Seller
Sub's respective corporate powers and have been duly authorized by all necessary
corporate action on the part of Seller or any such Seller Sub, as the case may
be. This Agreement and each of the Ancillary Agreements to which Seller and the
Seller Subs are parties have been duly executed and delivered by Seller and such
Seller Subs, as the case may be, and constitute valid and binding agreements of
Seller and such Seller Subs, as the case may be, enforceable against Seller and
such Seller Subs, as the case may be, in accordance with their respective terms,
except as may be limited by any bankruptcy, insolvency, reorganization,
moratorium, fraudulent conveyance or other similar law affecting the enforcement
of creditors' rights generally or by general principles of equity (regardless of
whether such enforceability is considered in a proceeding in equity or at law).

                                       9
<PAGE>
      3.03 NON-CONTRAVENTION. The execution, delivery and performance Seller and
each of the Seller Subs of this Agreement and each of the Ancillary Agreements
to which Seller and each of the Seller Subs that are transferring any of the
Purchased Assets are parties do not and will not (i) contravene or conflict with
the corporate charter or bylaws of Seller or such Seller Subs; or (ii)
contravene or conflict with or constitute a violation of any provision of any
law or regulation, judgment, injunction, order or decree binding upon or
applicable to Seller or such Seller Subs or the Business.

      3.04 CONTRACTS.

            (i) Seller has heretofore made available to Buyer true, correct and
complete copies of all Contracts, including any amendments thereto.

            (ii) Each of the Contracts (A) constitutes a valid and legally
binding obligation of (1) the Seller, (2) a Seller Sub and (3) to the knowledge
of the Seller and the respective Seller Sub which is a party to such Contract,
of the party or parties thereto, (B) is enforeable in accordance with its terms
(except as enforceability may be limited by applicable bankruptcy, insolveny,
reorganization, moratorium, fraudlent conveyance and similar laws of general
appliability relating to or affecting creditors' rights or by general equity
principles), and (C) is in full force and effect.

            (iii) There is no material default under any Contract either by the
Seller, any Seller Sub, or, to the knowledge of Seller and any Seller Sub or
party thereto, by any other party thereto, and no event has occurred that with
the lapse of time or the giving of notice or both would constitute a material
default thereunder by the Seller or any Seller Sub.

            (iv) No party to a customer Contract has notified either Seller or
any Seller Sub in writing of an intention to terminate or not to renew its
existing business relationship with Seller.

            (v) Schedule 2.01 hereto lists the Contract Value for each customer
Contract listed thereon.

      3.05 PERSONAL PROPERTY.

            (a) Any equipment included in the Purchased Assets has no material
defects, is in good operating condition and repair, has been reasonably
maintained consistent with standards generally followed in the industry (giving
due account to the age and length of use of same, ordinary wear and tear
excepted) and is suitable for its present uses.

            (b) No Purchased Asset is subject to any Lien, except for Permitted
Liens.

      3.06 TITLE TO PURCHASED ASSETS. Upon consummation of the transactions
contemplated hereby, Buyer will have acquired good and marketable title in and
to, or a valid leasehold interest in, each of the Purchased Assets, free and
clear of all Liens, except for Permitted Liens.

                                       10
<PAGE>
      3.07 LITIGATION. There is no material action, suit, investigation or
proceeding pending against or, to the knowledge of Seller or any of the Seller
Subs, threatened against or affecting any Purchased Asset before any court or
arbitrator or any governmental body, agency or official. There is no judgment,
order, injunction, decree, fine, penalty or award outstanding (whether rendered
by a court, administrative agency or arbitrator) against Seller or any of the
Seller Subs, or by which Seller or any Seller Sub is bound which relates to any
of the Purchased Assets.

      3.08 COMPLIANCE WITH LAWS. Seller and each of the Seller Subs is not in
violation in any material respect of any applicable law, regulation, ordinance,
order or any other requirement of any governmental body or court (including,
without limitation, matters relating to securities, loans, employment and
improper payments), and no notice has been received by Seller, any Seller Subs,
or any of their respective officers or directors alleging any such violation.

      3.09 PROPRIETARY RIGHTS.

            (a) Schedule 2.01 hereto contains a complete and correct list of all
Intellectual Property owned or used by Seller and each Seller Sub (other than
generally available "off-the-shelf" computer software), as well as all
registrations thereof and applications therefor, and each license and agreement
relating thereto. Except as indicated on Schedule 2.01, all of Seller's and
Seller Subs' patents, patent applications, registered trademarks, trademark
applications, registered copyrights and any other intellectual property subject
to application and/or registration issued by any state, government or other
public legal entity included in the Intellectual Property are valid and in full
force and effect and remain in good standing with all fees and filings paid as
of the date hereof and consummation of the transaction contemplated hereby will
not alter or impair any such rights. To the knowledge of Seller and each of the
Seller Subs, except as set forth on Schedule 3.09 hereto, there is no violation
by others of any right of Seller or any Seller Sub (and to the extent utilized
in the Business, Seller) with respect to any Intellectual Property, and Seller
and any of the Seller Subs is not infringing upon, misappropriating or violating
any third party's rights that would pertain to the Business. No proceedings have
been instituted or are pending or, to the knowledge of Seller or any of the
Seller Subs, threatened, nor any claims made alleging any such violation or
challenging or questioning the validity, enforceability or effectiveness of the
Intellectual Property. Neither Seller nor any of the Seller Subs have entered
into any agreement to indemnify any other person against any charge of
infringement of any Intellectual Property, other than indemnification provisions
contained in standard sales or license agreements to end users arising in the
ordinary course of business, the forms of which are attached hereto on Schedule
3.09(a).

            (b) The Intellectual Property contains only those items and rights
which are: (i) owned by Seller or any Seller Sub; (ii) in the public domain; or
(iii) rightfully used by Seller or any Seller Sub pursuant to a valid and
enforceable license or other agreement (the "LICENSED INTELLECTUAL PROPERTY"),
the parties, date, term and subject matter of each such license or other
agreement (each, a "LICENSE AGREEMENT") being set forth on Schedule 3.09(b).
Seller and each Seller Sub owns all right, title and interest in and to the
Intellectual Property, or has valid and sufficient licenses to all rights in the
Intellectual Property necessary to carry out Seller's and the Seller Subs
respective current Business activities free and clear of all liens, claims and
encumbrances, including without limitation, to the extent required to carry out
such activities, rights to make, use, reproduce, modify, adopt, create
derivative works based on, translate,

                                       11
<PAGE>
distribute (directly and indirectly), transmit, display and perform publicly,
license, rent and lease and, except with respect to the Licensed Intellectual
Property, assign and sell, the Intellectual Property. Seller and the Seller Subs
are the exclusive owners of all Trademark Rights used in connection with the
operation or conduct of the business of Seller and the Seller Subs, including
the provision of any services by Seller or any of the Seller Subs.

            (c) Schedule 3.09(c) contains a true and complete list of all
software programs owned or used by Seller and each of the Seller Subs, other
than software programs which are readily commercially available or for which
substitutes are available from more than one source (the "SOFTWARE PROGRAMS").
Seller and each Seller Sub, as the case may be, owns full and unencumbered right
and good and marketable title to such Software Programs which it owns, free and
clear of all mortgages, pledges, liens, security interests, conditional sales
agreements, encumbrances or charges of any kind. Seller and the Seller Subs have
full and unrestricted rights to use the Software Programs that they license
pursuant to the License Agreements.

            (d) The Software Programs are free of any disabling codes that may
be used to access, modify, delete, damage or disable any Systems (as defined
below) or that may result in impaired usage thereof or damage thereto. Seller
and the Seller Subs have taken reasonable steps and implemented reasonable
procedures to ensure that its internal computer systems used in connection with
the Business consisting of hardware, software, databases or embedded control
systems ("Systems") are free from disabling codes. The Systems' components used
in connection with the Business obtained by Seller or any Seller Sub from third
party suppliers are, to the best of knowledge of Seller or any Seller Sub, free
of any disabling codes that may, or may be used to, access, modify, delete,
damage or disable any of the Systems or that might result in damage thereto.
Except as may be set forth in Schedule 3.09(d), Seller and each of the Seller
Subs have in place appropriate disaster recovery plans and procedures and has
taken reasonable steps to safeguard their Systems and restrict unauthorized
access thereto. Seller and each Seller Sub have provided, or will provide prior
to the Closing, to Buyer an accurate list of all errors or "bugs" in the
Software Programs which are contained in the computer databases which Seller and
the Seller Subs maintain for the purpose of tracking errors and "bugs" in the
Software Programs.

            (e) Neither Seller nor any of the Seller Subs is a party to any
agreement pursuant to which any third party has any right to manufacture,
reproduce, distribute, market or exploit any of the Intellectual Property or any
adaptations, translations, or derivative works based on the Intellectual
Property or any portion thereof. Except with respect to the rights of third
parties to any Licensed Intellectual Property, no third party has rights to
manufacture, reproduce, distribute, market or exploit any works or materials of
any portion of the Intellectual Property if such portion of the Intellectual
Property constitutes a "derivative work" (as that term is defined in the United
States Copyright Act, Title 17, U.S.C. Section 101) of an underlying work of
authorship. Except as set forth in Schedule 3.09(e), neither Seller nor any of
the Seller Subs owe nor will owe any royalties or other payment to third parties
in respect of the Intellectual Property. All royalties or other payments that
have accrued prior to the Closing Date have been paid.

            (f) All designs, drawings, specifications, source code, object code,
documentation, flow charts and diagrams incorporating, embodying or reflecting
any of the Intellectual Property at any stage of their development were written,
developed and created

                                       12
<PAGE>
solely and exclusively by employees of Seller or the Seller Subs without the
assistance of any third party or entity or were created by third parties who
assigned ownership of their rights to Seller or Seller Subs pursuant to valid
and enforceable consultant confidentiality and invention assignment agreements.
Seller and each of the Seller Subs have at all times treated the Intellectual
Property as containing trade secrets and have not disclosed or otherwise dealt
with such items in such a manner as to cause the loss of such trade secrets by
release into the public domain, including without limitation, the use of
confidentiality agreements with all of its employees having access to the
Intellectual Property and the use of licenses with all individuals or entities
provided access to the Intellectual Property containing provisions restricting
copying and prohibiting decompiling or disassembly of the Intellectual Property.
Given the nature of the Business, to the knowledge of Seller and each Seller
Sub, no employee of Seller or any of the Seller Subs is in violation of any term
of any employment contract, patent disclosure agreement or any other contract or
agreement with respect to (i) the Intellectual Property or (ii) the relationship
of any such employee with Seller, any Seller Sub or any other party. No current
officer, director, employee, consultant or independent contractor of Seller or
any of the Seller Subs has and, to the knowledge of the Seller and each of the
Seller Subs, no former officer, director, stockholder, employee, consultant or
independent contractor has any right, claim or interest in or with respect to
any Intellectual Property.

      3.10 BOOKS AND RECORDS. All of the books and records of Seller and each
Seller Sub relating to the Purchased Assets have been made available to Buyer
prior to the execution of this Agreement and contain a true and complete record,
in all material respects, of the business, operations, financial condition,
results of operations, assets and liabilities relating to the Purchased Assets.
Neither Seller nor any Seller Sub has any books and records recorded, stored,
maintained, operated or otherwise wholly or partly dependent upon or held by any
means (including any electronic, mechanical or photographic process, whether
computerized or not) that are not under the exclusive ownership and direct
control of Seller or the respective Seller Sub.

                                   ARTICLE IV

                     REPRESENTATIONS AND WARRANTIES OF BUYER

      Buyer hereby represents and warrants to Seller, subject to the exceptions
specifically disclosed in writing in the corresponding sections or subsections
of Buyer's disclosure schedules or in any other section or subsection of Buyer's
disclosure schedules if it is reasonably apparent that such disclosure applies,
that:

      4.01 ORGANIZATION AND QUALIFICATION. Buyer has been duly organized and is
validly existing and in good standing (to the extent applicable) under the laws
of the jurisdiction of its incorporation or organization, as the case may be,
and has the requisite power and authority and all necessary governmental
approvals to own, lease and operate its properties and to carry on its business
as it is now being conducted.

      4.02 CORPORATE AUTHORIZATION. The execution, delivery and performance by
Buyer of this Agreement and each of the Ancillary Agreements, and the
consummation by Buyer of the transactions contemplated hereby and thereby are
within Buyer's powers and have been duly

                                       13
<PAGE>
authorized by all necessary action on the part of Buyer. This Agreement and each
of the Ancillary Agreements to which Buyer is a party have been, or will be in
the case of the Ancillary Agreements, duly executed and delivered by Buyer and
constitute valid and binding agreements of Buyer, enforceable against Buyer in
accordance with their respective terms, except as may be limited by any
bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance or
other similar law affecting the enforcement of creditors' rights generally or by
general principles of equity (regardless of whether such enforceability is
considered in a proceeding in equity or at law).

      4.03 NON-CONTRAVENTION. The execution, delivery and performance by Buyer
of this Agreement and each of the Ancillary Agreements to which Buyer is a party
do not and will not (i) contravene or conflict with the organizational documents
or bylaws of Buyer, (ii) contravene or conflict with or constitute a violation
of any provision of any material law or regulation, judgment, injunction, order
or decree binding upon or applicable to Buyer; (iii) constitute a material
default under or give rise to any right of termination, cancellation or
acceleration of any material right or obligation of Buyer or to a loss of any
material benefit relating to Buyer's business to which Buyer is entitled under
any provision of any material agreement, contract or other instrument binding
upon Buyer or by which any of Buyer's assets is or may be bound.

                                   ARTICLE V

                            COVENANTS OF THE PARTIES

      5.01 BEST EFFORTS; FURTHER ASSURANCES.

            (a) Subject to the terms and conditions of this Agreement and except
as otherwise set forth in this Agreement, each party will use its best efforts
to take, or cause to be taken, all actions and to do, or cause to be done, all
things necessary or desirable under applicable laws and regulations to
consummate the transactions contemplated by this Agreement. Seller (for itself
and or behalf of all Seller Subs who will be transferring Purchased Assets) and
Buyer each agree to execute and deliver such other documents, certificates,
agreements and other writings and to take such other actions as may be necessary
or desirable in order to consummate or implement expeditiously the transactions
contemplated by this Agreement and to vest in Buyer title to the Purchased
Assets as provided herein. Promptly after the Closing Date, but no more than
thirty calendar days thereafter, to the extent permitted under applicable law,
Seller will provide Buyer with copies of all forms of agreements, including
those individually amended by hand or otherwise, related to the Option Assets.

            (b) Seller (for itself and or behalf of all Seller Subs who will be
transferring Purchased Assets) hereby constitutes and appoints, effective as of
the Closing Date, Buyer and its successors and assigns as the true and lawful
attorney of Seller with full power of substitution in the name of Buyer or in
the name of Seller, but for the benefit of Buyer, except as otherwise
contemplated hereby, (i) to collect for the account of Buyer any items of
Purchased Assets and (ii) to institute and prosecute all proceedings which Buyer
may in its sole discretion deem proper in order to assert or enforce any right,
title or interest in, to or under the Purchased Assets, and to defend or
compromise any and all actions, suits or proceedings in respect of the Purchased

                                       14
<PAGE>
Assets. Buyer shall be entitled to retain for its account any amounts collected
pursuant to the foregoing powers, including any amounts payable as interest in
respect thereof.

      5.02 CERTAIN FILINGS. Seller and Buyer shall cooperate with one another
and shall use all reasonable efforts and take all reasonable steps to obtain all
consents, approvals, waivers or other documents from any third parties,
including any governmental authorities, and make all filings, registrations and
other notifications, as may be required to consummate the transactions
contemplated by this Agreement and, in taking such actions or making any such
filings, furnishing information required in connection therewith and seeking
timely to obtain any such actions, consents, approvals or waivers.

      5.03 CONFIDENTIALITY. The parties hereto shall comply with, and shall
cause their respective Representatives to comply with, all of their respective
obligations under the Confidentiality Agreement with respect to the information
disclosed pursuant to this Agreement provided however, that, the parties shall
be permitted to make such disclosures as they shall reasonably determine are,
and to the extent, required by law.

      5.04 COVENANT NOT TO COMPETE.

            (a) Seller and each Seller Sub covenant and agree that, except as
permitted under this Section 5.04, for a period of three years after the Closing
Date, it will not, and, in the case of Seller, will cause its Subsidiaries not
to, engage in the Business anywhere in the world other than the United States of
America, its territories and possessions and the Excluded Territories; provided,
however, that (i) nothing herein shall be construed to prevent Seller from
owning as a passive investor up to five percent (5%) in any person that engages
in the Business, and (ii) Seller's having entered into the Excluded Agreement
shall not constitute a violation of this Section 5.04.

            (b) It is the desire and intent of the parties that the provisions
of this Section 5.04 shall be enforced to the fullest extent permitted under the
laws and public policies of each jurisdiction in which enforcement is sought. If
any court determines that any provision of this Section 5.04 is unenforceable,
such court shall have the power to reduce the duration or scope of such
provision, as the case may be, or terminate such provision and, in reduced form,
such provision shall be enforceable; it is the intention of the parties that the
foregoing restrictions shall not be terminated, unless so terminated by a court,
but shall be deemed amended to the extent required to render them valid and
enforceable, such amendment to only apply with respect to the operation of this
Section 5.04 in the jurisdiction of the court that has made the adjudication.

            (c) The parties acknowledge and agree that the restrictions
contained in this Section 5.04 are a reasonable and necessary protection of the
immediate interest of Buyer, and any violation of these restrictions would cause
substantial injury to Buyer and Buyer would not have entered into this Agreement
without receiving the additional consideration offered by Seller and the Seller
Subs in binding itself to these restrictions. In the event of a breach or a
threatened breach by Seller or any of its Subs of these restrictions, Buyer
shall be entitled to apply to any court of competent jurisdiction for an
injunction restraining such person from such breach or threatened breach
(without the necessity of providing the inadequacy of money damages as a
remedy); provided, however, that the right to apply for injunctive relief shall
not be construed as

                                       15
<PAGE>
prohibiting Buyer from pursuing any other available remedies for such breach or
threatened breach.

      5.05 MAIL AND COMMUNICATIONS. Seller will promptly remit to Buyer any mail
or other communications received by Seller relating to the Business or the
Purchased Assets and any invoices received by Seller relating to Assumed
Liabilities which are received by Seller from and after the Closing Date. Buyer
will promptly remit to Seller any mail or other communications, including,
without limitation, any written inquiries and payments received by Buyer
relating to the Excluded Assets or to any business or activity of Seller other
than the Business, and any invoices received by Buyer relating to liabilities of
Seller other than the Assumed Liabilities which are received by Buyer from and
after the Closing Date.

      5.06 PUBLIC ANNOUNCEMENTS. Buyer and Seller shall consult with each other
before issuing any press release concerning this Agreement or the transactions
contemplated hereby or otherwise making any public statements with respect to
this Agreement or the transactions contemplated hereby, and shall not issue any
such press release or make any such public statement without the prior written
consent of the other (which shall not be unreasonably withheld), except to the
extent required by applicable Law or the requirements of the rules and
regulations of the SEC or the NNM, in which case the issuing party shall use all
reasonable efforts to consult with the other party before issuing any such
release or making any such public statement. The initial press release
concerning the transactions contemplated hereby shall be a joint press release
approved by the parties to this Agreement.

      5.07 TAXES.

            (a) Seller shall pay all Taxes imposed upon Seller. Seller shall
also pay, or reimburse Buyer for, all Taxes imposed on Buyer or any affiliate of
Buyer and any Taxes to which the Purchased Assets are subject or for which a
lien, claim or encumbrance can be placed upon the Purchased Assets but only in
each case to the extent that any such Taxes relate to periods (or portions
thereof) ending on or prior to the Closing Date or transactions or events
occurring on or prior to the Closing Date and only to the extent related to the
Business and including any sales or transfer taxes pertaining to the Acquisition
regardless of which party may be the legal obligor under applicable law.
Liability for any Taxes that Seller is required to satisfy pursuant to this
Section 5.07 shall not constitute or be treated as Assumed Liabilities.

            (b) With respect to state and local ad valorem taxes on the
Purchased Assets (whether personal or real, owned or leased) for the current Tax
year, Seller shall be responsible for the payment of all such Taxes for the
period up to and including the Closing Date and Buyer shall be responsible for
the payment of all such Taxes for the period after the Closing Date. For all
purposes of this Agreement, (i) all such Taxes assessed on an annual basis shall
be prorated on the assumption that an equal amount of Tax applies to each day of
the year, regardless of how installment payments are billed or made and (ii) any
supplemental property Taxes or assessments which arise out of a revaluation of a
Purchased Asset which revaluation would not have occurred except for the change
in ownership of the Purchased Asset shall be allocated to periods after the
Closing Date and shall accordingly be borne by Buyer.

                                       16
<PAGE>
            (c) Buyer agrees to take all actions reasonably requested by Seller
to minimize any sales, use and other transfer taxes and fees incurred in
connection with the assignment, conveyance, transfer and/or delivery of the
Purchased Assets hereunder (collectively, the "Sales Taxes"), including, without
limitation the transfer via means of electronic transmission of all assets
capable of being so transmitted. Buyer further agrees to deliver all
certificates reasonably requested by Seller to verify the fact of such
electronic transmissions or other actions. Seller shall be responsible for the
payment of the amount of any Sales Taxes.

      5.08 COOPERATION AND RECORDS RETENTION. Seller and Buyer shall (i) each
provide the other with such assistance as may reasonably be requested by them in
connection with the preparation of any Tax Returns, or in connection with any
audit or other examination by any taxing authority or any judicial or
administrative proceedings relating to liability for Taxes, (ii) each retain and
provide the other, with any records or other information which may be relevant
to any such Tax Return, audit or examination, proceeding or determination, and
(iii) each provide the other with any final determination of any such audit or
examination, proceeding or determination that affects any amount required to be
shown on any Tax Return of the other for any period. Without limiting the
generality of the foregoing, Seller and Buyer shall retain, until the applicable
statute of limitations (including any extensions) have expired, copies of all
Tax Returns, supporting work schedules and other records or information which
may be relevant to such Tax Returns for all tax periods or portions thereof
ending before or including the Closing Date and shall not destroy or otherwise
dispose of any such records without first providing the other party with a
reasonable opportunity to review and copy the same. Buyer shall keep the
original copies of the records and, at Seller's expense, shall provide copies of
the records to Seller upon Seller's request.

                                   ARTICLE VI

                                    SURVIVAL

      6.01 SURVIVAL. The covenants, agreements, representations and warranties
of the parties hereto contained in this Agreement or in any certificate or other
writing delivered pursuant hereto or in connection herewith shall survive the
Closing until twelve (12) months after the Closing Date or in the case of (a)
Section 5.04 (Covenant Not To Compete) for the period set forth therein and (b)
Section 5.07 until the expiration of any applicable statute of limitations.

                                  ARTICLE VII

                                  MISCELLANEOUS

      7.01 NOTICES. All notices, requests and other communications to either
party hereunder shall be in writing (including telecopy or similar writing) and
shall be given,

                  if to Buyer, to:

                                       17
<PAGE>
                  NetRatings, Inc.
                  890 Hillview Court
                  Milpitas, CA  95035
                  Attn: Jason Gray, Esq.
                  Facsimile No.: 408-586-0208

                  with a copy to:

                  Gray Cary Ware & Freidenrich LLP
                  400 Hamilton Avenue
                  Palo Alto, Ca 94301
                  Attn: Jon C. Perry
                  Facsimile No.: 650-833-2001

                  if to Seller or Seller Subs, to:

                  Jupiter Media Metrix, Inc.
                  21 Astor Place, 6th Floor
                  New York, NY 10003
                  Attn: Chief Executive Officer
                  Facsimile No.: 917-534-6800

                  with a copy to Brobeck:

                  Brobeck, Phleger & Harrison LLP
                  1633 Broadway, 47th Floor
                  New York, New York 10019
                  Attention:  Richard H. Gilden, Esq.
                  Facsimile: (212) 586-7878

      7.02 AMENDMENTS; NO WAIVERS.

            (a) Any provisions of this Agreement may be amended or waived prior
to the Closing Date if, and only if, such amendment or waiver is in writing and
signed, in the case of an amendment, by Buyer and Seller, or in the case of a
waiver, by the party against whom the waiver is to be effective.

            (b) No failure or delay by either party in exercising any right,
power or privilege hereunder shall operate as a waiver thereof nor shall any
single or partial exercise thereof preclude any other or further exercise
thereof or the exercise of any other right, power or privilege. The rights and
remedies herein provided shall be cumulative and not exclusive of any rights or
remedies provided by law.

      7.03 EXPENSES. Except as otherwise provided herein, all costs and expenses
incurred in connection with this Agreement shall be paid by the party incurring
such cost or expense. Seller shall pay all sales and transfer taxes that may be
imposed by reason of the sale, transfer, assignment and delivery of the
Purchased Assets and shall timely prepare and file all tax returns related
thereto.

                                       18
<PAGE>
      7.04 SUCCESSORS AND ASSIGNS. Except as otherwise provided in this
Agreement, no party hereto shall assign this Agreement or any rights or
obligations hereunder without the prior written consent of the other party
hereto and any such attempted assignment without such prior written consent
shall be void and of no force and effect. The provisions of this Agreement shall
be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns.

      7.05 GOVERNING LAW. This Agreement shall be construed in accordance with
and governed by the law of the State of Delaware, without regard to the
conflicts of law rules of such state.

      7.06 BULK SALES LAWS. Buyer hereby waives compliance by Seller and the
Seller Subs with the provisions of the "bulk sales", "bulk transfer" or similar
laws of any state or Non-United States jurisdiction. Seller and Buyer, agree to
indemnify and hold the other harmless against any and all claims, losses,
damages, liabilities, costs and expenses incurred by such party or any of its
affiliates as a result of any failure to comply with any such "bulk sales",
"bulk transfer" or similar laws.

      7.07 COUNTERPARTS; EFFECTIVENESS. This Agreement may be signed in any
number of counterparts, each of which shall be an original, with the same effect
as if the signatures thereto and hereto were upon the same instrument. This
Agreement shall become effective when each party hereto shall have received a
counterpart hereof signed by the other party hereto.

      7.08 ENTIRE AGREEMENT. This Agreement, the Ancillary Agreements and the
Confidentiality Agreement constitute the entire agreement between the parties
with respect to the subject matter hereof and supersedes all prior agreements,
understandings and negotiations, both written and oral, between the parties with
respect to the subject matter of this Agreement. No representation, inducement,
promise, understanding, condition or warranty not set forth herein has been made
or relied upon by either party hereto. None of this Agreement, the Ancillary
Agreements or the Confidentiality Agreement is intended to confer upon any
Person other than the parties hereto any rights or remedies hereunder.

      7.09 CAPTIONS. The captions herein are included for convenience of
reference only and shall be ignored in the construction or interpretation
hereof.

      7.10 INCORPORATION OF EXHIBITS AND SCHEDULES. The Exhibits and Schedules
referred to in this Agreement are incorporated herein and made a part hereof.

      7.11 SEVERABILITY. If any term or other provision of this Agreement is
invalid, illegal or incapable of being enforced by any rule of law or public
policy, all other conditions and provisions of this Agreement shall nevertheless
remain in full force and effect. Upon such determination that any term or other
provision is invalid, illegal or incapable of being enforced, the parties hereto
shall negotiate in good faith to modify this Agreement so as to effect the
original intent of the parties as closely as possible to the fullest extent
permitted by applicable law in an acceptable manner to the end that the
transactions contemplated hereby are fulfilled to the extent possible.

                                       19
<PAGE>
      IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.

                          JUPITER MEDIA METRIX, INC.

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Chief Financial Officer

                          MMXI NORDIC AB (SWEDEN)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                          MMXI EUROPE BV (NETHERLANDS)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                          MMXI UK LIMITED  (UNITED KINGDOM)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                                       20
<PAGE>
                          MMXI DEUTSCHLAND GMBH  (GERMANY)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                          MMXI FRANCE SARL (FRANCE)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                          MMXI ESPANA (SPAIN)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                          MMXI ITALIA SRL (ITALY)

                          By: /s/ Jean Robinson
                              -----------------
                              Name:  Jean Robinson
                              Title:  Managing Director

                          NETRATINGS, INC.

                          By: /s/ William Pulver
                              ------------------
                              Name:  William Pulver
                              Title:  President and Chief Executive Officer

                  [SIGNATURE PAGE TO ASSET PURCHASE AGREEMENT]

                                       21
<PAGE>
                                TABLE OF CONTENTS

                                                                            Page

                                    EXHIBIT A

                  Assignment of Intellectual Property Agreement

                                       i
<PAGE>
                                TABLE OF CONTENTS
                                  (continued)

                                                                            Page

                                    EXHIBIT B

                Bill of Sale, Assignment and Assumption Agreement

                                       ii

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00039-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00039-of-00352.parquet"}]]