MEDIAONE GROUP INC
8-K, 1999-03-22
TELEPHONE COMMUNICATIONS (NO RADIOTELEPHONE)
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------

                                    FORM 8-K

                             CURRENT REPORT PURSUANT
                          TO SECTION 13 OR 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                            ------------------------


        Date of Report (Date of Earliest Event Reported): March 22, 1999


                              MEDIAONE GROUP, INC.
- --------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in its Charter)


                                    DELAWARE
- --------------------------------------------------------------------------------
                 (State or Other Jurisdiction of Incorporation)


        1-8611                                           84-0926774
- ------------------------                    ------------------------------------
(Commission File Number)                    (I.R.S. Employer Identification No.)


188 INVERNESS DRIVE WEST                                       80112
ENGLEWOOD, COLORADO
- -----------------------------------------------   ------------------------------
(Address of Principal Executive offices)                     (Zip Code)


                                 (303) 858-3000
- --------------------------------------------------------------------------------
               (Registrant's Telephone Number, Including Area Code


                                       N/A
- --------------------------------------------------------------------------------
          (Former Name or Former Address, if changed Since Last Report)

================================================================================


NY2:\379949\01\856501!.DOC\62634.0016
<PAGE>
Item 5.           Other Events.

         On March 21, 1999, MediaOne Group, Inc. ("MediaOne") and Comcast
Corporation ("Comcast") entered into an Agreement and Plan of Merger (the
"Merger Agreement"), pursuant to which MediaOne will be merged with and into
Comcast, with Comcast being the surviving corporation of such merger (the
"Merger"). Upon consummation of the Merger, the separate corporate existence of
MediaOne will cease, and the existing stockholders of MediaOne will become
stockholders of Comcast in accordance with the terms of the Merger Agreement.

         The consideration will consist of newly issued shares of Comcast's
Class A Special Common Stock, par value $1.00 per share ("Comcast Common
Stock"), having an aggregate value of approximately $60 billion. At the
effective time of the Merger, each outstanding share of MediaOne Common Stock,
par value $.01 per share, will be converted into the right to receive 1.1 shares
of Comcast Common Stock (subject to adjustment to account for the previously
announced 2 for 1 split of Comcast Common Stock).

         The consummation of the Merger is subject to certain conditions,
including approval by the stockholders of each of MediaOne and Comcast. Pursuant
to the Merger Agreement, MediaOne and Comcast will prepare and file a joint
proxy statement/ prospectus to be mailed to stockholders in connection with
calling meetings of the stockholders of MediaOne and Comcast to vote on the
Merger.

         In addition to stockholder approval, the Merger is subject to, among
other conditions, the receipt of all necessary regulatory approvals, including
approvals from the Federal Communications Commission and pursuant to the
Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended.

         While the Merger Agreement prohibits MediaOne from soliciting competing
acquisition proposals, MediaOne may, subject to compliance with the terms of the
Merger Agreement and payment of a $1.5 billion fee to Comcast, accept a superior
proposal within 45 days.

         In connection with the proposed Merger, MediaOne is amending its
Amended and Restated Rights Agreement, dated as of June 12, 1998, to exclude
Comcast's acquisition of MediaOne stock pursuant to the Merger Agreement from
the definition of a "15% Stockholder" included therein.



                                       2
<PAGE>
Item 7.     Financial Statements, Pro Forma Financial Information and Exhibits.

(c)      Exhibits

Exhibit No.    Exhibit
- -----------    -------

2.1            Agreement and Plan of Merger, dated as of March 22, 1999, by and
               between MediaOne Group, Inc. and Comcast Corporation

4.1            Form of Amendment No. 1 to Amended and Restated Rights Agreement,
               dated as of June 12, 1998, by and between MediaOne Group, Inc.
               and State Street Bank and Trust Company

99.1           Press Release dated March 22, 1999



                                   SIGNATURES

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


                                          MEDIAONE GROUP, INC.

                                          By: /s/ Stephen E. Brilz
                                              ----------------------------------
Date:  March 22, 1999                         Name: Stephen E. Brilz
                                              Title: Assistant Secretary



                                       3
<PAGE>
                                  EXHIBIT INDEX

Exhibit No.    Exhibit
- -----------    -------

2.1            Agreement and Plan of Merger, dated as of March 22, 1999, by and
               between MediaOne Group, Inc. and Comcast Corporation

4.1            Form of Amendment No. 1 to Amended and Restated Rights Agreement,
               dated as of June 12, 1998, by and between MediaOne Group, Inc.
               and State Street Bank and Trust Company

99.1           Press Release dated March 22, 1999













                                       4



                                                                   Exhibit 2.1


                                                                EXECUTION COPY







                          AGREEMENT AND PLAN OF MERGER

                                   dated as of

                                 March 22, 1999

                                     between

                              MEDIAONE GROUP, INC.

                                       and

                               COMCAST CORPORATION








(NY) 05726/069/MA/merger.agt.wpd
<PAGE>
                                TABLE OF CONTENTS

                                 ---------------

                                                               PAGE

                             ARTICLE 1 DEFINITIONS

SECTION 1.01.  Definitions.......................................1

                              ARTICLE 2 THE MERGER

SECTION 2.01.  The Merger.......................................11
SECTION 2.02.  Articles of Incorporation and Bylaws of 
                the Surviving Corporation.......................11
SECTION 2.03.  Articles of Incorporation of Comcast.............11
SECTION 2.04.  Directors and Officers of the Surviving 
                Corporation.....................................12
SECTION 2.05.  Alternative Transaction Structure................12

                       ARTICLE 3 CONVERSION OF SECURITIES

SECTION 3.01.  Conversion of Capital Stock......................13
SECTION 3.02.  Surrender and Payment............................15
SECTION 3.03.  Dissenting Shares................................17
SECTION 3.04.  Stock Options....................................18
SECTION 3.05.  Adjustments......................................19
SECTION 3.06.  Fractional Shares................................19
SECTION 3.07.  Withholding Rights...............................20
SECTION 3.08.  Lost Certificates................................20


              ARTICLE 4 REPRESENTATIONS AND WARRANTIES OF MEDIAONE

SECTION 4.01.  Corporate Existence and Power....................21
SECTION 4.02.  Corporate Authorization..........................21
SECTION 4.03.  Governmental Authorization.......................21
SECTION 4.04.  Non-contravention................................22
SECTION 4.05.  Capitalization...................................22
SECTION 4.06.  Subsidiaries.....................................23
SECTION 4.07.  SEC Filings......................................24
SECTION 4.08.  Financial Statements.............................25
SECTION 4.09.  Information Supplied.............................25
SECTION 4.10.  Absence of Certain Changes.......................26
SECTION 4.11.  No Undisclosed Material Liabilities..............26
SECTION 4.12.  Compliance with Laws and Court Orders............26
SECTION 4.13.  Litigation.......................................27

<PAGE>
                                                               PAGE

SECTION 4.14.  Finders' Fees....................................27
SECTION 4.15.  Opinion of Financial Advisor.....................27
SECTION 4.16.  Taxes............................................27
SECTION 4.17.  Tax Opinions.....................................28
SECTION 4.18.  Employee Benefit Plans and Labor Matters.........28
SECTION 4.19.  Environmental Matters............................31
SECTION 4.20.  Intellectual Property............................31
SECTION 4.21.  Contracts........................................32
SECTION 4.22.  TWE..............................................33
SECTION 4.23.  Vote Required....................................33
SECTION 4.24.  Antitakeover Statutes and Rights Agreement.......33


              ARTICLE 5 REPRESENTATIONS AND WARRANTIES OF COMCAST

SECTION 5.01.  Corporate Existence and Power....................34
SECTION 5.02.  Corporate Authorization..........................34
SECTION 5.03.  Governmental Authorization.......................35
SECTION 5.04.  Non-contravention................................35
SECTION 5.05.  Capitalization...................................36
SECTION 5.06.  Subsidiaries.....................................37
SECTION 5.07.  SEC Filings......................................37
SECTION 5.08.  Financial Statements.............................38
SECTION 5.09.  Information Supplied.............................38
SECTION 5.10.  Absence of Certain Changes.......................39
SECTION 5.11.  No Undisclosed Material Liabilities..............39
SECTION 5.12.  Compliance with Laws and Court Orders............39
SECTION 5.13.  Litigation.......................................40
SECTION 5.14.  Finders' Fees....................................40
SECTION 5.15.  Opinion of Financial Advisor.....................40
SECTION 5.16.  Taxes............................................40
SECTION 5.17.  Tax Opinions.....................................41
SECTION 5.18.  Employee Benefit Plans and Labor Matters.........41
SECTION 5.19.  Environmental Matters............................43
SECTION 5.20.  Intellectual Property............................44
SECTION 5.21.  Contracts........................................44
SECTION 5.22.  Vote Required....................................45
SECTION 5.23.  MediaOne Securities..............................45


                        ARTICLE 6 COVENANTS OF MEDIAONE

SECTION 6.01.  MediaOne Interim Operations......................46


                                       ii
<PAGE>
                                                               PAGE

SECTION 6.02.  MediaOne Stockholders' Meeting; Proxy Material...50
SECTION 6.03.  No Solicitation..................................51
SECTION 6.04.  Redemption of Preferred Stock....................52
SECTION 6.05.  Channel Launches.................................52


                         ARTICLE 7 COVENANTS OF COMCAST

SECTION 7.01.  Comcast Interim Operations.......................53
SECTION 7.02.  Comcast Stockholders' Meeting....................55
SECTION 7.03.  Director and Officer Liability...................55
SECTION 7.04.  Quotation of Stock...............................56
SECTION 7.05.  Comcast Board of Directors.......................56
SECTION 7.06.  Employee Matters.................................57


                  ARTICLE 8 COVENANTS OF COMCAST AND MEDIAONE

SECTION 8.01.  Best Efforts.....................................59
SECTION 8.02.  Proxy Statement; Registration Statement..........60
SECTION 8.03.  Public Announcements.............................61
SECTION 8.04.  Further Assurances...............................61
SECTION 8.05.  Access to Information............................61
SECTION 8.06.  Notices of Certain Events........................62
SECTION 8.07.  Tax-free Reorganization..........................62
SECTION 8.08.  Affiliates.......................................63
SECTION 8.09.  TWE Termination Notice...........................63
SECTION 8.10.  Assumption of Certain Obligations................63


                       ARTICLE 9 CONDITIONS TO THE MERGER

SECTION 9.01.  Conditions to the Obligations of Each Party......63
SECTION 9.02.  Conditions to the Obligations of Comcast.........64
SECTION 9.03.  Conditions to the Obligations of MediaOne........65


                             ARTICLE 10 TERMINATION

SECTION 10.01.  Termination.....................................66
SECTION 10.02.  Effect of Termination...........................68
SECTION 10.03.  Fees and Expenses...............................69




                                       iii
<PAGE>

                                                               PAGE
                            ARTICLE 11 MISCELLANEOUS

SECTION 11.01.  Notices.........................................70
SECTION 11.02.  Survival of Representations and Warranties......71
SECTION 11.03.  Amendments; No Waivers..........................71
SECTION 11.04.  Successors and Assigns..........................72
SECTION 11.05.  Governing Law...................................72
SECTION 11.06.  Jurisdiction....................................72
SECTION 11.07.  WAIVER OF JURY TRIAL............................72
SECTION 11.08.  Counterparts; Effectiveness.....................72
SECTION 11.09.  Entire Agreement................................73
SECTION 11.10.  Captions........................................73
SECTION 11.11.  Severability....................................73
SECTION 11.12.  Specific Performance............................73
SECTION 11.13.  Schedules.......................................73



                                       iv
<PAGE>
                     EXHIBITS AND SCHEDULES

Exhibit A --  Form of Voting Agreement

Exhibit B --  Form of MediaOne Rule 145 Affiliate Letter

MediaOne Disclosure Schedule

Comcast Disclosure Schedule













                                        v
<PAGE>
                          AGREEMENT AND PLAN OF MERGER

      AGREEMENT AND PLAN OF MERGER dated as of March 22, 1999 between MediaOne
Group, Inc., a Delaware corporation ("MEDIAONE"), and Comcast Corporation, a
Pennsylvania corporation ("COMCAST").

      WHEREAS, the respective Boards of Directors of Comcast and MediaOne have
approved this Agreement, and deem it advisable and in the best interests of
their respective stockholders to consummate the merger of MediaOne with and into
Comcast on the terms and conditions set forth herein;

      WHEREAS, as a condition and inducement to MediaOne's entering into this
Agreement, concurrently with the execution and delivery of this Agreement,
MediaOne, Comcast Stockholder (as defined herein) and Brian L. Roberts are
entering into a Voting Agreement in the form attached as Exhibit A hereto (the
"VOTING AGREEMENT"), pursuant to which Comcast Stockholder has agreed to vote
its shares of Comcast Class A Common Stock (as defined herein) and Comcast Class
B Common Stock (as defined herein) (i) in favor of the proposal to issue Comcast
Common Stock (as defined herein) in the Merger (as defined herein) and, if
necessary, to amend the Comcast articles of incorporation, as contemplated by
Section 2.03 hereof and (ii) in favor of the election of the New Directors (as
defined herein) to the Comcast Board of Directors; and

      WHEREAS, it is intended that, for federal income tax purposes, the Merger
shall qualify as a reorganization within the meaning of the provisions of
Section 368(a) of the Internal Revenue Code of 1986 (the "CODE");

      NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth below, the
parties agree as follows:



                                    ARTICLE 1
                                   DEFINITIONS

      SECTION 1.01.  Definitions.  (a) The following terms, as used herein, have
the following meanings:

      "ACQUISITION PROPOSAL" means any offer or proposal for, or any indication
of interest in (i) a merger, consolidation, share exchange, business
combination, reorganization, recapitalization or other similar transaction
involving MediaOne

<PAGE>
or any MediaOne Significant Subsidiary or (ii) the acquisition, directly or
indirectly, of (A) an equity interest representing greater than 25% of the
voting securities of MediaOne or any MediaOne Significant Subsidiary or (B)
assets, securities or ownership interests representing an amount equal to or
greater than 25% of the consolidated assets or earning power of the MediaOne
Group, other than the transactions contemplated by this Agreement or permitted
pursuant to Section 6.01 hereof.

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

      "BENEFIT ARRANGEMENT" means, with respect to any Person, any employment,
severance or similar contract or arrangement (whether or not written) providing
for compensation, bonus, profit-sharing, stock option, or other stock-related
rights or other forms of incentive or deferred compensation, vacation benefits,
insurance coverage (including any self-insured arrangements), health or medical
benefits, disability benefits, workers' compensation, supplemental unemployment
benefits, severance benefits and post-employment or retirement benefits
(including compensation, pension, health, medical or life insurance or other
benefits) that (i) is not an Employee Plan, (ii) is entered into, maintained,
administered or contributed to, as the case may be, by such Person or any of its
Affiliates and (iii) covers any employee or former employee of such Person or
any of its Subsidiaries employed in the United States. "MEDIAONE BENEFIT
ARRANGEMENTS" means the Benefit Arrangements of MediaOne or the MediaOne
Subsidiaries and "COMCAST BENEFIT ARRANGEMENTS" means the Benefit Arrangements
of Comcast or the Comcast Subsidiaries.

      "BUSINESS DAY" means a day other than a Saturday, Sunday or other day on
which commercial banks in New York City are authorized or required by law to
close.

      "COMMON STOCK RATIO" means (i) if the Effective Time occurs on or before
the Dividend Record Date, 1.10 and (ii) if the Effective Time occurs after the
Dividend Record Date, 2.20.

      "DEFERRED COMPENSATION PLAN" means, with respect to any Person, any plan,
agreement or arrangement that (i) is described under Sections 4(b)(5) or
401(a)(1) of ERISA (or similar plan covering one or more non-employee directors
of a Person), (ii) is maintained, administered or contributed to or required to
be contributed to by such Person or any of its Affiliates and (iii) covers any
current or former employee or director of such Person or any of its
Subsidiaries. "MEDIAONE DEFERRED COMPENSATION PLAN" means a Deferred
Compensation Plan of MediaOne or any MediaOne Affiliate for the benefit of any
current or


                                2
<PAGE>
former employee or director of MediaOne or any MediaOne Subsidiary and "COMCAST
DEFERRED COMPENSATION PLAN" means a Deferred Compensation Plan of Comcast or any
Comcast Affiliate for the benefit of any current or former employee or director
of Comcast or any Comcast Subsidiary.

      "DELAWARE LAW" means the General Corporation Law of the State of
Delaware.

      "DIVIDEND RECORD DATE" means April 20, 1999; provided that (i) if the
April 20 Dividend is paid to shareholders of record on a different date, the
Dividend Record Date will be the revised record date and (ii) if the April 20
Dividend is not paid, the Common Stock Ratio will be calculated on the
assumption that the Effective Time occurred before the Dividend Record Date.

      "EMPLOYEE PLAN" means, with respect to any Person, any "employee benefit
plan", as defined in Section 3(3) of ERISA, that (i) is subject to any provision
of ERISA, (ii) is maintained, administered or contributed to by such Person or
any of its Affiliates and (iii) covers any employee or former employee of such
Person or any of its Subsidiaries. "MEDIAONE EMPLOYEE PLAN" means an Employee
Plan of MediaOne or any of the MediaOne Subsidiaries and "COMCAST EMPLOYEE PLAN"
means an Employee Plan of Comcast or any of the Comcast Subsidiaries.

      "ENVIRONMENTAL LAWS" means any federal, state, local or foreign law
(including, without limitation, common law), treaty, judicial decision,
regulation, rule, judgment, order, decree, injunction, permit or governmental
restriction or requirement or any agreement with any Governmental Authority or
other third party, relating to human health and safety, the environment or to
pollutants, contaminants, wastes or chemicals or any toxic, radioactive,
ignitable, corrosive, reactive or otherwise hazardous substances, wastes or
materials.

      "ENVIRONMENTAL PERMITS" means, with respect to any Person, all permits,
licenses, franchises, certificates, approvals and other similar authorizations
of any Governmental Authority relating to or required by Environmental Laws and
affecting, or relating in any way to, the business of such Person or any of its
Subsidiaries as currently conducted.

      "ERISA" means the Employee Retirement Income Security Act of 1974.

      "ERISA AFFILIATE" of any entity means any other entity that, together with
such entity, would be treated as a single employer under Section 414 of the
Code.

      "FCC" means the Federal Communications Commission.



                                3
<PAGE>
      "FRANCHISE" means a written "franchise" within the meaning of Section
602(8) of the Communications Act.

      "FRANCHISING AUTHORITY" means "franchising authority" within the meaning
of Section 602(9) of the Communications Act.

      "COMCAST BALANCE SHEET" means the Consolidated Balance Sheet of Comcast
and its consolidated subsidiaries as of December 31, 1998 and the footnotes
thereto, as set forth in the Comcast 10-K.

      "COMCAST BALANCE SHEET DATE" means December 31, 1998.

      "COMCAST COMMON STOCK" means the Class A Special Common Stock, par value
$1.00 per share, of Comcast.

      "COMCAST FRANCHISES" means Franchises for the Comcast Systems.

      "COMCAST GROUP" means Comcast and the Comcast Subsidiaries.

      "COMCAST MATERIAL ADVERSE EFFECT" means a material adverse effect on the
financial condition, assets or results of operations of Comcast and the Comcast
Subsidiaries, taken as a whole, excluding any such effect resulting from or
arising in connection with (i) this Agreement, the transactions contemplated
hereby or the announcement thereof, (ii) changes or conditions generally
affecting the industries in which Comcast and the Comcast Subsidiaries operate
or (iii) changes in general economic, regulatory or political conditions.

      "COMCAST SIGNIFICANT SUBSIDIARY" means any Comcast Subsidiary that would
constitute a "significant subsidiary" within the meaning of Rule 1-02 of
Regulation S-X of the SEC as of December 31, 1998; provided that for purposes
hereof, the phrase "earnings before interest, taxes, depreciation and
amortization" will be substituted for the phrase "income from continuing
operations before income taxes, extraordinary items and cumulative effect of a
change in accounting principle" in Rule 1-02(w)(3).

      "COMCAST STOCKHOLDER" means Sural Corporation, a Delaware
corporation.

      "COMCAST SUBSIDIARY" means any entity of which securities or other
ownership interests having ordinary voting power to elect a majority of the
board of directors or other persons performing similar functions are at any
time, directly or indirectly, owned by Comcast.



                                4
<PAGE>
      "COMCAST 10-K" means Comcast's annual report on Form 10-K for the fiscal
year ended December 31, 1998.

      "HSR ACT" means the Hart-Scott-Rodino Antitrust Improvements Act of
1976.

      "INTERNATIONAL PLAN" means, with respect to any Person, any employment,
severance or similar contract or arrangement (whether or not written) or any
plan, policy, fund, program or arrangement or contract providing for severance,
insurance coverage (including any self-insured arrangements), workers'
compensation, disability benefits, supplemental unemployment benefits, vacation
benefits, pension or retirement benefits or for deferred compensation,
profit-sharing, bonuses, stock options, stock appreciation rights or other forms
of incentive compensation or post-retirement insurance, compensation or benefits
that (i) is not an Employee Plan or a Benefit Arrangement, (ii) is entered into,
maintained, administered or contributed to by such Person or any of its
Affiliates and (iii) covers any employee or former employee of such Person or
any of its Subsidiaries. "MEDIAONE INTERNATIONAL PLAN" means an International
Plan of MediaOne or any of the MediaOne Subsidiaries and "COMCAST INTERNATIONAL
PLAN" means an International Plan of Comcast or any of the Comcast Subsidiaries.

      "KNOWLEDGE" means, with respect to any fact, the conscious awareness of
such fact by an executive officer (as defined under the 1933 Act) of the
relevant Person.

      "LIEN" means, with respect to any property or asset, any mortgage, lien,
pledge, charge, security interest, encumbrance or other adverse claim of any
kind in respect of such property or asset. For purposes of this Agreement, a
Person shall be deemed to own subject to a Lien any property or asset that it
has acquired or holds subject to the interest of a vendor or lessor under any
conditional sale agreement, capital lease or other title retention agreement
relating to such property or asset.

      "MULTIEMPLOYER PLAN" means each Employee Plan that is a multiemployer
plan, as defined in Section 3(37) of ERISA.

      "NASDAQ" means The Nasdaq National Market.

      "NYSE" means The New York Stock Exchange, Inc.

      "1933 ACT" means the Securities Act of 1933.



                                5
<PAGE>
      "1934 ACT" means the Securities Exchange Act of 1934.

      "MEDIAONE BALANCE SHEET" means the Consolidated Balance Sheets of MediaOne
and its consolidated subsidiaries as of December 31, 1998 and the footnotes
thereto set forth in the MediaOne 10-K.

      "MEDIAONE BALANCE SHEET DATE" means December 31, 1998.

      "MEDIAONE COMMON STOCK" means Common Stock, par value $0.01 per share, of
MediaOne.

      "MEDIAONE FRANCHISES" means Franchises for the MediaOne Systems.

      "MEDIAONE GROUP" means MediaOne and the MediaOne Subsidiaries.

      "MEDIAONE MATERIAL ADVERSE EFFECT" means a material adverse effect on
financial condition, assets or results of operations of the MediaOne Group taken
as a whole, excluding any such effect resulting from or arising in connection
with (A) this Agreement, the transactions contemplated hereby or the
announcement thereof, (B) changes or conditions generally affecting the
industries in which MediaOne, the MediaOne Subsidiaries, TWE and the TWE
Subsidiaries, operate or (C) changes in general economic, regulatory or
political conditions.

      "MEDIAONE RIGHTS AGREEMENTS" means the Amended and Restated Rights
Agreement (the "MEDIAONE 1995 RIGHTS AGREEMENT") dated as of October 31, 1995
between MediaOne and State Street Bank and Trust Company, as Rights Agent, and
the Rights Agreement (the "MEDIAONE 1999 RIGHTS AGREEMENT") dated as of April 6,
1999 between MediaOne and State Street Bank and Trust Company, as Rights Agent.

      "MEDIAONE SIGNIFICANT SUBSIDIARY" means any MediaOne Subsidiary that would
constitute a "significant subsidiary" within the meaning of Rule 1-02 of
Regulation S-X of the SEC as of December 31, 1998; provided that for purposes
hereof, the phrase "earnings before interest, taxes, depreciation and
amortization" will be substituted for the phrase "income from continuing
operations before income taxes, extraordinary items and cumulative effect of a
change in accounting principle" in Rule 1-02(w)(3).

      "MEDIAONE SOCIAL CONTRACT" means the agreement dated August 3, 1995
between the FCC and Red, and the related FCC authorization dated July 3, 1997.

      "MEDIAONE SUBSIDIARY" means any entity of which securities or other
ownership interests having ordinary voting power to elect a majority of the
board


                                        6
<PAGE>
of directors or other persons performing similar functions are at any time,
directly or indirectly, owned by MediaOne. For the avoidance of doubt, (i)
neither TWE nor Telewest Communications plc will be treated as MediaOne
Subsidiaries and (ii) Mercury Personal Communications will be treated as a
MediaOne Subsidiary for so long as MediaOne owns, directly or indirectly, not
less than a 50% interest therein.

      "MEDIAONE SYSTEMS" means the Systems owned and operated by MediaOne or any
MediaOne Subsidiary in the United States.

      "MEDIAONE 10-K" means MediaOne's annual report on Form 10-K for the fiscal
year ended December 31, 1998, in draft form dated March 20, 1999 as provided to
Comcast prior to the date hereof.

      "PBGC" means the Pension Benefit Guaranty Corporation.

      "PENNSYLVANIA LAW" means the Business Corporation Law of 1988 of the
Commonwealth of Pennsylvania.

      "PENSION PLAN" means, with respect to any Person, any plan (other than a
Multiemployer Plan) that is subject to Title IV of ERISA and is maintained,
administered or contributed to or required to be contributed to by such Person
or any of its ERISA Affiliates. "MEDIAONE PENSION PLAN" means a Pension Plan of
MediaOne or any of its ERISA Affiliates and "COMCAST PENSION PLAN" means a
Pension Plan of Comcast or any of its ERISA Affiliates.

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

      "SEC" means the Securities and Exchange Commission.

      "SUBSIDIARY" means, with respect to any Person, any entity of which
securities or other ownership interests having ordinary voting power to elect a
majority of the board of directors or other persons performing similar functions
are at any time directly or indirectly owned by such Person.

      "SUPERIOR PROPOSAL" means any bona fide, unsolicited written Acquisition
Proposal that the Board of Directors of MediaOne determines in good faith by a
majority vote, on the basis of the advice of a financial advisor of nationally
recognized reputation, and taking into account all the terms and conditions of
the Acquisition Proposal, is more favorable to MediaOne's stockholders than the
Merger and for which financing, to the extent required, is


                                7
<PAGE>
then fully committed or reasonably determined to be available by the Board of
Directors of MediaOne.

      "SYSTEM" means a "cable television system" within the meaning of Section
602(7) of the Communications Act.

      "TW" means Time Warner Inc., a Delaware corporation.

      "TWE" means Time Warner Entertainment Company, L.P., a Delaware limited
partnership.

      "TWE AGREEMENTS" means the TWE Partnership Agreement, together with any
related agreements between MediaOne or any MediaOne Subsidiary, on the one hand,
and TW or any Subsidiary of TW, on the other hand.

      "TWE PARTNERSHIP AGREEMENT" means the Agreement of Limited Partnership
dated as of October 29, 1991, as amended.

      "TWE SUBSIDIARY" means any entity of which securities or other ownership
interests having ordinary voting power to elect a majority of the board of
directors or other persons performing similar functions are at any time directly
or indirectly owned by TWE.

      "U S WEST" means U S WEST, Inc. a Delaware corporation.

      Any reference in this Agreement to a statute shall be to such statute, as
amended from time to time, and to the rules and regulations promulgated
thereunder.

     (b) Each of the following terms is defined in the Section set forth
opposite such term:


TERM                                    SECTION
- ----                                    -------

Adjusted Option........................ 3.04(a)
Alternative Election................... 2.05
Alternative Merger..................... 2.05
Alternative Merger Notice.............. 2.05
April 20 Dividend...................... 3.05
Benefits Maintenance Period............ 7.06(a)
Certificates........................... 3.02(a)
Certificate of Merger.................. 2.01(b)
Code................................... Preamble
Comcast................................ Preamble



                                8
<PAGE>
TERM                                    Section
- ----                                    -------

Comcast Benefit Arrangements........... 1.01(a)
Comcast Class A Common Stock........... 5.05(a)
Comcast Class B Common Stock........... 5.05(a)
Comcast Employee Plan.................. 1.01(a)
Comcast Intellectual Property.......... 5.20
Comcast International Plan............. 1.01(a)
Comcast MOG............................ 2.05
Comcast SEC Documents.................. 5.07(a)
Comcast Securities..................... 5.05(b)
Comcast Series A Preferred Stock....... 5.05(a)
Comcast Series B Preferred Stock....... 5.05(a)
Comcast Series C Preferred Stock....... 3.01(b)
Comcast Series D Preferred Stock....... 3.01(c)
Comcast Series E  Preferred Stock...... 3.01(d)
Comcast Stockholders' Approval......... 7.02
Comcast Stockholders' Meeting.......... 4.09
Comcast Subsidiary..................... 5.19
Common Certificates.................... 3.02(a)
Common Stock Consideration............. 3.01(a)
Confidentiality Agreement.............. 6.03(a)
Effective Time......................... 2.01(b)
End Date............................... 10.01(b)
Exchange Agent......................... 3.02(a)
Exchange Fund.......................... 3.02(a)
Franchise Consents..................... 4.03
GAAP................................... 4.08
Governmental Authority................. 4.03
Indemnified Losses..................... 7.03(a)
Indemnified Person..................... 7.03(a)
Initial Period......................... 6.03(a)
IRS.................................... 4.16
License Consents....................... 4.03
MediaOne............................... Preamble
MediaOne Benefit Arrangements.......... 1.01(a)
MediaOne Common Holders................ 3.02(b)
MediaOne Employee Plan................. 1.01(a)
MediaOne Intellectual Property......... 4.20
MediaOne International Plan............ 1.01(a)
MediaOne 1995 Rights Agreement......... 1.01(a)
MediaOne 1999 Rights Agreement......... 1.01(a)
MediaOne Rule 145 Affiliate............ 8.08
MediaOne SEC Documents................. 4.07(a)



                                9
<PAGE>
TERM                                    Section
- ----                                    -------

MediaOne Securities.................... 4.05(b)
MediaOne Series A Preferred Stock...... 4.05(a)
MediaOne Series C Preferred Stock...... 3.01(b)
MediaOne Series C Holders.............. 3.02(b)
MediaOne Series D Holders.............. 3.02(b)
MediaOne Series D Preferred Stock...... 3.01(c)
MediaOne Series E Holders.............. 3.02(b)
MediaOne Series E Preferred Stock...... 3.01(d)
MediaOne Series F Preferred Stock...... 4.05(a)
MediaOne Stockholders' Meeting......... 4.09
MediaOne Stockholders' Approval........ 4.23
MediaOne Stock Option.................. 3.04(a)
MediaOne Subsidiary.................... 4.19
Merger................................. 2.01(a)
New Directors.......................... 7.05
New Directors Committee................ 7.05
Proxy Statement........................ 4.09
Purchase Rights........................ 8.01(a)
Registration Statement................. 4.09
Series C Certificates.................. 3.02(a)
Series D Certificates.................. 3.02(a)
Series E Certificates.................. 3.02(a)
Series C Consideration................. 3.01(b)
Series D Consideration................. 3.01(c)
Series E Consideration................. 3.01(d)
Social Contract Consent................ 4.03
Spinoff................................ 9.02(c)
Standstill Agreement................... 6.03(a)
Stockholders' Meetings................. 4.09
Successor Plan......................... 7.06(b)
Surviving Corporation.................. 2.01(a)
Tax Return............................. 4.16
Taxes.................................. 4.16
Termination Fee........................ 10.03(b)
Termination Notice Election............ 8.09
Third Party............................ 6.03(a)
Transferred Employees.................. 7.06(a)
368 Reorganization..................... 8.07(a)
U S  WEST Agreements................... 8.10
Voting Agreement....................... Preamble



                                10
<PAGE>
                                    ARTICLE 2
                                   THE MERGER

      SECTION 2.01. The Merger. (a) At the Effective Time, MediaOne shall be
merged (the "MERGER") with and into Comcast in accordance with Delaware Law and
Pennsylvania Law and upon the terms set forth in this Agreement, whereupon the
separate existence of MediaOne shall cease and Comcast shall be the surviving
corporation (the "SURVIVING CORPORATION").

     (b) As soon as practicable (and, in any event, within 5 Business Days)
after satisfaction or, to the extent permitted hereunder, waiver of all
conditions to the Merger set forth in Article 9, other than conditions that by
their nature are to be satisfied at the Effective Time and will in fact be
satisfied at the Effective Time, (i) a certificate of merger shall be duly
prepared, executed and acknowledged by MediaOne and Comcast and thereafter
delivered to the Secretary of State of Delaware for filing pursuant to Delaware
Law and (ii) articles of merger shall be duly prepared, executed and
acknowledged by MediaOne and Comcast and thereafter delivered to the Department
of State of Pennsylvania for filing pursuant to Pennsylvania Law. Such
certificate of merger and articles of merger shall be referred to herein as the
"CERTIFICATE OF MERGER". The Merger shall become effective at such time (the
"EFFECTIVE TIME") as the Certificate of Merger is duly filed with such Secretary
of State of Delaware and Department of State of Pennsylvania (or at such later
time as may be agreed by MediaOne and Comcast and specified in the Certificate
of Merger).

     (c) From and after the Effective Time, the Surviving Corporation shall
possess all the rights, powers, privileges and franchises and be subject to all
of the obligations, liabilities, restrictions and disabilities of MediaOne and
Comcast, all as provided under Delaware Law and Pennsylvania Law.

      SECTION 2.02. Articles of Incorporation and Bylaws of the Surviving
Corporation. The articles of incorporation of Comcast in effect at the Effective
Time shall be the articles of incorporation of the Surviving Corporation. The
bylaws of Comcast in effect at the Effective Time shall be the bylaws of the
Surviving Corporation until amended in accordance with applicable law.

      SECTION 2.03. Articles of Incorporation of Comcast. The articles of
incorporation of Comcast in effect prior to the Effective Time shall be amended
prior to the Effective Time to (i) increase the number of shares of authorized
Comcast Common Stock to 2,500,000,000, if Comcast's stockholders do not approve
the proposal to increase the number of shares of authorized Comcast Common Stock
to 2,500,000,000 at the special meeting of Comcast's


                                11
<PAGE>
stockholders to be held on April 20, 1999, and (ii) designate the Comcast Series
C Preferred Stock, the Comcast Series D Preferred Stock and the Comcast Series E
Preferred Stock. As so amended, such articles of incorporation shall be the
articles of incorporation of Comcast until thereafter changed or amended as
provided therein or by applicable law.

      SECTION 2.04. Directors and Officers of the Surviving Corporation. From
and after the Effective Time, until successors are duly elected or appointed and
qualified in accordance with applicable law, (i) the directors of Comcast at the
Effective Time, together with the New Directors as specified in Section 7.05,
shall be the directors of the Surviving Corporation and (ii) the officers of
Comcast at the Effective Time shall be the officers of the Surviving
Corporation.

      SECTION 2.05. Alternative Transaction Structure. (a) At any time prior to
the Effective Time, by mutual agreement not to be unreasonably withheld, the
parties may elect to restructure the transaction in the manner contemplated by
this Section 2.05. Upon making such election (the "ALTERNATIVE ELECTION"), the
Merger contemplated by Section 2.01 shall be restructured in the manner set
forth in this Section 2.05. In such event, all references to the term "Merger"
shall be deemed references to the transactions contemplated by this Section
2.05; all references to the term "Surviving Corporation" shall be deemed
references to Comcast MOG, Inc., a Delaware corporation ("COMCAST MOG") and a
wholly owned subsidiary of Comcast; all references to the term "Effective Time"
in this Agreement shall be deemed references to the time at which the
certificate of merger is duly filed with the Secretary of State of the State of
Delaware (or at such later time as is specified in the certificate of merger)
with respect to the Merger as restructured in the manner contemplated by this
Section 2.05; Section 2.01 shall no longer be of any force or effect; and the
provisions of this Section 2.05 shall govern the terms of the Merger. The
Merger, restructured as contemplated by this Section 2.05 is sometimes referred
to as the "ALTERNATIVE MERGER". Comcast MOG shall become a party to this
Agreement as a constituent corporation of the Alternative Merger prior to the
MediaOne Stockholders' Meeting. At the Effective Time of the Alternative Merger,
MediaOne shall be merged with and into Comcast MOG in accordance with Delaware
Law and upon the terms set forth in this Agreement, whereupon the separate
existence of MediaOne shall cease. If the Alternative Merger Notice is given,
the representations, warranties and other provisions of this Agreement shall be
appropriately amended to account for the change while otherwise effecting the
intent of the parties as expressed in this Agreement. For the avoidance of
doubt, (i) the Alternative Merger shall not affect the provisions of Article 3
hereof, including the Common Stock Consideration, Series C Consideration, Series
D Consideration or Series E Consideration, (ii) all obligations of Comcast set
forth herein shall not be affected or limited by the Alternative Merger and
(iii) Comcast


                                12
<PAGE>
shall also be responsible for the obligations of the Surviving Corporation under
Section 7.03 hereof.



                                    ARTICLE 3
                            CONVERSION OF SECURITIES

      SECTION 3.01.  Conversion of Capital Stock.  At the Effective Time,

     (a) Except as otherwise provided in Section 3.01(e) and Section 3.06, each
share of MediaOne Common Stock outstanding immediately prior to the Effective
Time shall be converted into the right to receive a number of shares of Comcast
Common Stock equal to the Common Stock Ratio (together with the cash in lieu of
fractional shares of Comcast Common Stock as specified below, the "COMMON STOCK
CONSIDERATION") (and the associated preferred stock purchase rights issued
pursuant to the MediaOne Rights Agreements shall be terminated immediately prior
thereto);

     (b) Except as otherwise provided in Section 3.01(e) or Section 3.03, each
share of Series C Cumulative Redeemable Preferred Stock, par value $1.00 per
share, of MediaOne (the "MEDIAONE SERIES C PREFERRED STOCK"), outstanding
immediately prior to the Effective Time shall be converted into the right to
receive one-tenth of a share of the corresponding series (the "COMCAST SERIES C
PREFERRED STOCK") of Comcast Preferred Stock (the "SERIES C CONSIDERATION") that
shall have terms that are identical to those of the MediaOne Series C Preferred
Stock had there been a 1 for 10 reverse split of each share of Comcast Series C
Preferred Stock; provided that (A) the Comcast Series C Preferred Stock shall
rank on a parity with the Comcast Series A Preferred Stock and the Comcast
Series B Preferred Stock with respect to the payment of dividends and the
distribution of assets upon liquidation, dissolution or winding up, (B) as a
result of the Merger, the issuer thereof shall be Comcast rather than MediaOne
and (C) Comcast's obligations to pay full quarterly dividends in respect of
shares of Comcast Series C Preferred Stock (from the date of the last dividend
paid on the MediaOne Series C Preferred Stock) shall commence on the first
dividend payment date that occurs following the Effective Time;

     (c) Except as otherwise provided in Section 3.01(e) and Section 3.06, each
share of Series D Convertible Preferred Stock, par value $1.00 per share, of
MediaOne (the "MEDIAONE SERIES D PREFERRED STOCK") outstanding immediately prior
to the Effective Time shall be converted into the right to receive one-tenth of
a share of the corresponding series (the "COMCAST SERIES D PREFERRED STOCK") of


                                13
<PAGE>
Comcast Preferred Stock (together with the cash in lieu of fractional shares of
Comcast Series D Preferred Stock, the "SERIES D CONSIDERATION") that shall have
terms that are identical to those of the MediaOne Series D Preferred Stock had
there been a 1 for 10 reverse split of each share of Comcast Series D Preferred
Stock; provided that (A) the Comcast Series D Preferred Stock shall rank on a
parity with the Comcast Series A Preferred Stock and the Comcast Series B
Preferred Stock with respect to the payment of dividends and the distribution of
assets upon liquidation, dissolution or winding up, (B) as a result of the
Merger, the issuer thereof shall be Comcast rather than MediaOne, (C) Comcast's
obligations to pay full quarterly dividends in respect of shares of Comcast
Series D Preferred Stock (from the date of the last dividend paid on the
MediaOne Series D Preferred Stock) shall commence on the first dividend payment
date that occurs following the Effective Time and (D) the Comcast Series D
Preferred Stock shall initially be convertible into a number of shares of
Comcast Common Stock equal to (x) the "Conversion Rate" of the MediaOne Series D
Preferred Stock in effect immediately prior to the Effective Time multiplied by
(y) the Common Stock Ratio;

     (d) Except as otherwise provided in Section 3.01(e) or Section 3.03, each
share of Series E Convertible Preferred Stock, par value $1.00 per share, of
MediaOne (the "MEDIAONE SERIES E PREFERRED STOCK") outstanding immediately prior
to the Effective Time shall be converted into the right to receive one-tenth of
a share of the corresponding series (the "COMCAST SERIES E PREFERRED STOCK") of
Comcast Preferred Stock (the "SERIES E CONSIDERATION") that shall have terms
that are identical to those of the MediaOne Series E Preferred Stock had there
been a 1 for 10 reverse split of each share of Comcast Series E Preferred Stock;
provided that (A) the Comcast Series E Preferred Stock shall rank on a parity
with the Comcast Series A Preferred Stock and the Comcast Series B Preferred
Stock with respect to the payment of dividends and the distribution of assets
upon liquidation, dissolution or winding up, (B) as a result of the Merger, the
issuer thereof shall be Comcast rather than MediaOne, (C) Comcast's obligations
to pay full quarterly dividends in respect of shares of Comcast Series E
Preferred Stock (from the date of the last dividend paid on the MediaOne Series
E Preferred Stock) shall commence on the first dividend payment date that occurs
following the Effective Time and (D) the conversion rate for the MediaOne Series
E Preferred Stock shall be fixed as set forth in the Certificate of Designations
relating thereto;

     (e) Each share of MediaOne Common Stock, MediaOne Series C Preferred Stock,
MediaOne Series D Preferred Stock or MediaOne Series E Preferred Stock held by
MediaOne as treasury stock or owned by Comcast immediately prior to the
Effective Time shall be canceled, and no payment shall be made with respect
thereto; and


                                14
<PAGE>
     (f) Each share of capital stock of Comcast outstanding immediately prior to
the Effective Time shall remain outstanding.

      SECTION 3.02. Surrender and Payment. (a) Prior to the Effective Time,
Comcast shall appoint an agent (the "EXCHANGE AGENT") for the purpose of (i)
exchanging certificates representing shares of MediaOne Common Stock (the
"COMMON CERTIFICATES") for the Common Stock Consideration, (ii) exchanging
certificates representing shares of MediaOne Series C Preferred Stock (the
"SERIES C CERTIFICATES") for the Series C Consideration, (iii) exchanging
certificates representing shares of MediaOne Series D Preferred Stock (the
"SERIES D CERTIFICATES") for the Series D Consideration and (iv) exchanging
certificates representing shares of MediaOne Series E Preferred Stock (the
"SERIES E CERTIFICATES", and together with the Common Certificates, the Series C
Certificates and the Series D Certificates, the "CERTIFICATES") for the Series E
Consideration. At the Effective Time, Comcast will make available to the
Exchange Agent, as needed, (i) the Common Stock Consideration to be paid in
respect of shares of MediaOne Common Stock, (ii) the Series C Consideration to
be paid in respect of shares of MediaOne Series C Preferred Stock, (iii) the
Series D Consideration to be paid in respect of shares of MediaOne Series D
Preferred Stock, (iv) the Series E Consideration to be paid in respect of shares
of MediaOne Series E Preferred Stock and (v) cash in an amount required to be
paid pursuant to Section 3.02(f). The Common Stock Consideration, Series C
Consideration, Series D Consideration, Series E Consideration and cash referred
to in items (i) through (v) are referred to herein as the "EXCHANGE FUND".
Promptly after the Effective Time, Comcast will send, or will cause the Exchange
Agent to send, to each holder of shares of MediaOne Common Stock, MediaOne
Series C Preferred Stock, MediaOne Series D Preferred Stock or MediaOne Series E
Preferred Stock at the Effective Time, a letter of transmittal and instructions
(which shall specify that the delivery shall be effected, and risk of loss and
title shall pass, only upon proper delivery of the Certificates to the Exchange
Agent) for use in such exchange.

     (b) Upon surrender to the Exchange Agent of its Certificate, together with
a properly completed letter of transmittal, (i) each holder of shares of
MediaOne Common Stock (the "MEDIAONE COMMON HOLDERS") will be entitled to
receive the Common Stock Consideration in respect of the shares of MediaOne
Common Stock represented by its Certificate; (ii) each holder of shares of
MediaOne Series C Preferred Stock (the "MEDIAONE SERIES C HOLDERS") will be
entitled to receive the Series C Consideration in respect of the shares of
MediaOne Series C Preferred Stock represented by its Certificate; (iii) each
holder of shares of MediaOne Series D Preferred Stock (the "MEDIAONE SERIES D
HOLDERS") will be entitled to receive the Series D Consideration in respect of
the


                                15
<PAGE>
shares of MediaOne Series D Preferred Stock represented by its Certificate and
(iv) each holder of shares of MediaOne Series E Preferred Stock (the "MEDIAONE
SERIES E HOLDERS") will be entitled to receive the Series E Consideration in
respect of the shares represented by its Certificate. In addition, each such
MediaOne Common Holder, MediaOne Series C Holder, MediaOne Series D Holder and
MediaOne Series E Holder will be entitled to receive any dividends and
distributions payable pursuant to Section 3.02(f). Until so surrendered, each
such Certificate shall represent after the Effective Time, for all purposes,
only the right to receive the Common Stock Consideration, the Series C
Consideration, the Series D Consideration or the Series E Consideration, as the
case may be.

     (c) If any portion of the Common Stock Consideration, the Series C
Consideration, the Series D Consideration or the Series E Consideration is to be
paid to a Person other than the Person in whose name the Certificate so
surrendered is registered, it shall be a condition to such payment that such
Certificate shall be properly endorsed or otherwise be in proper form for
transfer and that the Person requesting such payment shall pay to the Exchange
Agent any transfer or other taxes required as a result of such payment to a
Person other than the registered holder of such Certificate, or establish to the
satisfaction of the Exchange Agent that such tax has been paid or is not
payable.

     (d) After the Effective Time, there shall be no further registration of
transfers of shares of MediaOne Common Stock, MediaOne Series C Preferred Stock,
MediaOne Series D Preferred Stock or MediaOne Series E Preferred Stock. If,
after the Effective Time, Certificates are presented to the Surviving
Corporation, they shall be canceled and exchanged for the Common Stock
Consideration, the Series C Consideration, the Series D Consideration or the
Series E Consideration provided for, and in accordance with the procedures set
forth, in this Article 3.

     (e) Any portion of the Exchange Fund made available to the Exchange Agent
pursuant to Section 3.02(a) that remains unclaimed by the MediaOne Common
Holders, MediaOne Series C Holders, MediaOne Series D Holders and MediaOne
Series E Holders one year after the Effective Time shall be returned to Comcast,
upon demand, and any such holder who has not exchanged its shares for the Common
Stock Consideration, the Series C Consideration, the Series D Consideration or
the Series E Consideration in accordance with this Section 3.02 prior to that
time shall thereafter look only to Comcast for payment of such consideration,
and any dividends and distributions in respect of such shares without any
interest thereon. Notwithstanding the foregoing, Comcast shall not be liable to
any MediaOne Common Holder, MediaOne Series C Holder, MediaOne Series D Holder
or MediaOne Series E Holder for any amounts paid to a public official pursuant
to applicable abandoned property, escheat or similar


                                16
<PAGE>
laws. Any amounts remaining unclaimed by the MediaOne Common Holders, MediaOne
Series C Holders, MediaOne Series D Holders and MediaOne Series E Holders five
years after the Effective Time (or such earlier date, immediately prior to such
time when the amounts would otherwise escheat to or become property of any
Governmental Authority) shall become, to the extent permitted by applicable law,
the property of Comcast free and clear of any claims or interest of any Person
previously entitled thereto.

     (f) No dividends or other distributions with respect to any Comcast
Securities constituting part of the Common Stock Consideration, the Series C
Consideration, the Series D Consideration or the Series E Consideration and, in
the case of the Common Certificates and Series D Certificates, no cash payment
in lieu of fractional shares as provided in Section 3.06, shall be paid to the
holder of any unsurrendered Certificates until such Certificates are surrendered
as provided in Section 3.02(b). Following such surrender, there shall be paid,
without interest, to the Person in whose name such Comcast Securities have been
registered, (i) at the time of such surrender, (A) in the case of Common
Certificates and Series D Certificates, the amount of any cash payable in lieu
of fractional shares to which such Person is entitled pursuant to Section 3.06,
and (B) the amount of all dividends or other distributions with a record date
after the Effective Time previously paid or payable on the date of such
surrender, with respect to such Comcast Securities, and (ii) at the appropriate
payment date, the amount of dividends or other distributions with a record date
after the Effective Time but prior to surrender, and with a payment date
subsequent to surrender, payable with respect to such Comcast Securities.

     (g) Any portion of the Series C Consideration or the Series E Consideration
made available to the Exchange Agent pursuant to Section 3.02(a) to pay for
shares of MediaOne Series C Preferred Stock or MediaOne Series E Preferred Stock
for which appraisal rights have been perfected shall be returned to Comcast upon
demand.

      SECTION 3.03. Dissenting Shares. Notwithstanding Sections 3.01(b) and
3.01(d), shares of MediaOne Series C Preferred Stock and MediaOne Series E
Preferred Stock outstanding immediately prior to the Effective Time and held by
a holder who has not voted in favor of the Merger and has demanded appraisal for
such shares in accordance with Delaware Law shall not be converted into a right
to receive the Series C Consideration or the Series E Consideration, as the case
may be, unless such holder fails to perfect, withdraws or otherwise loses its
right to appraisal. If, after the Effective Time, such holder fails to perfect,
withdraws or loses its right to appraisal, such shares shall be treated as if
they had been converted as of the Effective Time into a right to receive the
Series C Consideration or the Series E Consideration, as the case may be.
MediaOne shall


                                17
<PAGE>
give Comcast prompt notice of any demands received by MediaOne for appraisal of
shares, and Comcast shall have the right to participate in all negotiations and
proceedings with respect to such demands. Except with the prior written consent
of Comcast, MediaOne shall not make any payment with respect to, or settle or
offer to settle, any such demands.

      SECTION 3.04. Stock Options. (a) Each outstanding option to purchase
shares of MediaOne Common Stock granted under any stock option or compensation
plans or arrangements (a "MEDIAONE STOCK OPTION"), whether or not exercisable or
vested, shall be adjusted as necessary to provide that, at the Effective Time,
each MediaOne Stock Option outstanding immediately prior to the Effective Time
shall be deemed to constitute an option to acquire, on the same terms and
conditions as were applicable under such MediaOne Stock Option (including terms
regarding vesting), the same number of shares of Comcast Common Stock as the
holder of such MediaOne Stock Option would have been entitled to receive
pursuant to the Merger had such holder exercised such MediaOne Stock Option in
full immediately prior to the Effective Time, at a price per share of Comcast
Common Stock equal to (A) the aggregate exercise price for the shares of
MediaOne Common Stock otherwise purchasable pursuant to such MediaOne Stock
Option divided by (B) the aggregate number of shares of Comcast Common Stock
deemed purchasable pursuant to such MediaOne Stock Option (each, as so adjusted,
an "ADJUSTED OPTION"); provided that any fractional share of Comcast Common
Stock resulting from an aggregation of all the shares of a holder subject to
MediaOne Stock Option shall be rounded up to the nearest whole share, and
provided further that, for any MediaOne Stock Option to which Section 421 of the
Code applies by reason of its qualification under any of Sections 422 through
424 of the Code, the option price, the number of shares purchasable pursuant to
such option and the terms and conditions of exercise of such option shall be
determined in order to comply with Section 424 of the Code.

     (b) Comcast shall take such actions as are necessary for the assumption of
the MediaOne Stock Options pursuant to this Section 3.04 and any obligations to
issue MediaOne Common Stock under the existing terms of any other plans,
agreements or arrangements of MediaOne covering any current or former employee
or director of MediaOne or any MediaOne Subsidiary, including the reservation,
issuance and listing of Comcast Common Stock as is necessary to effectuate the
transactions contemplated by this Section 3.04. Comcast shall prepare and file
with the SEC a registration statement on Form S-8 (or any other appropriate
form) or a post-effective amendment to a registration statement previously filed
under the 1933 Act, with respect to the shares of Comcast Common Stock subject
to the Adjusted Options and, where applicable, shall use its reasonable best
efforts to have such registration statement declared effective as soon as
practicable following the Effective Time and to maintain the effectiveness


                                18
<PAGE>
of such registration statement covering such Adjusted Options (and to maintain
the current status of the prospectus contained therein) for so long as such
Adjusted Options remain outstanding. With respect to those individuals, if any,
who, subsequent to the Effective Time, will be subject to the reporting
requirements under Section 16(a) of the 1934 Act, where applicable, Comcast
shall use all reasonable efforts to administer any Adjusted Options issued
pursuant to this Section 3.04 in a manner that complies with Rule 16b-3
promulgated under the 1934 Act to the extent that the MediaOne Stock Option in
respect of which such Adjusted Option has been issued complied with such rule
prior to the Merger.

      SECTION 3.05. Adjustments. On March 3, 1999, the Board of Directors of
Comcast declared a conditional dividend of one share of Comcast Common Stock for
each share of Comcast Common Stock, Comcast Class A Common Stock and Comcast
Class B Common Stock held of record at the close of business on April 20, 1999
(the "APRIL 20 DIVIDEND"). The Common Stock Consideration has been calculated in
a manner that accounts for the April 20 Dividend, regardless of whether (i) it
is paid to shareholders of record on April 20, 1999, (ii) the record date
therefor is changed and it is paid to shareholders of record on a different date
or (iii) it is not paid at all. If, during the period between the date of this
Agreement and the Effective Time, any other change in the outstanding shares of
capital stock of MediaOne or Comcast shall occur, including by reason of any
reclassification, recapitalization, stock split or combination, exchange or
readjustment of shares, or any stock dividend thereon with a record date during
such period, the Common Stock Consideration and any other amounts payable
pursuant to this Agreement shall be appropriately adjusted.

      SECTION 3.06. Fractional Shares. No fractional shares of Comcast Common
Stock or Comcast Series D Preferred Stock shall be issued in the Merger. All
fractional shares of Comcast Common Stock that a holder of shares of MediaOne
Common Stock would otherwise be entitled to receive as a result of the Merger
shall be aggregated and if a fractional share results from such aggregation,
such holder shall be entitled to receive, in lieu thereof, an amount in cash
without interest determined by multiplying the closing sale price of a share of
Comcast Common Stock on Nasdaq on the trading day immediately preceding the
Effective Time by the fraction of a share of Comcast Common Stock to which such
holder would otherwise have been entitled. All fractional shares of Comcast
Series D Preferred Stock that a holder of shares of MediaOne Series D Preferred
Stock would otherwise be entitled to receive as a result of the Merger shall be
aggregated and if a fractional share results from such aggregation, such holder
shall be entitled to receive, in lieu thereof, an amount in cash without
interest determined by multiplying (i) ten times the average closing sale price
of a share of MediaOne Series D Preferred Stock on the NYSE for the twenty
trading days immediately preceding the Effective Time and (ii) the fraction of a
share of


                                19
<PAGE>
Comcast Series D Preferred Stock to which such holder would otherwise have been
entitled.

      SECTION 3.07. Withholding Rights. Comcast shall be entitled to deduct and
withhold from the consideration otherwise payable to any Person pursuant to this
Article 3 such amounts as it is required to deduct and withhold with respect to
the making of such payment under any provision of federal, state, local or
foreign tax law. If Comcast so withholds amounts, such amounts shall be treated
for all purposes of this Agreement as having been paid to the MediaOne Common
Holder, the MediaOne Series C Holder, the MediaOne Series D Holder or the
MediaOne Series E Holder, as the case may be, in respect of which Comcast made
such deduction and withholding.

      SECTION 3.08. Lost Certificates. If any Certificate is lost, stolen or
destroyed, upon the making of an affidavit of that fact by the Person claiming
such Certificate to be lost, stolen or destroyed and executing an indemnity
reasonably satisfactory to the Surviving Corporation (and, if required by the
Surviving Corporation in the case of a Certificate representing more than 1,000
shares (100 shares in the case of the MediaOne Series D Preferred Stock), the
posting by such Person of a bond, in such reasonable amount as the Surviving
Corporation may direct, as indemnity) against any claim that may be made against
it with respect to such Certificate, the Exchange Agent will issue, in exchange
for such lost, stolen or destroyed Certificate, (i) the Common Stock
Consideration to be paid in respect of the shares of MediaOne Common Stock
represented by such Certificate, (ii) the Series C Consideration to be paid in
respect of the shares of MediaOne Series C Preferred Stock represented by such
Certificate, (iii) the Series D Consideration to be paid in respect of the
shares of MediaOne Series D Preferred Stock represented by such Certificate, or
(iv) the Series E Consideration to be paid in respect of the shares of MediaOne
Series E Preferred Stock represented by such Certificate, as the case may be. In
addition, such Person will be entitled to receive any amounts payable pursuant
to Section 3.02(f).



                                    ARTICLE 4
                   REPRESENTATIONS AND WARRANTIES OF MEDIAONE

      Except as set forth in the MediaOne Disclosure Schedule or as disclosed in
the MediaOne SEC Documents filed prior to the date hereof, MediaOne represents
and warrants to Comcast as follows:


                                       20
<PAGE>
      SECTION 4.01. Corporate Existence and Power. MediaOne is a corporation
duly incorporated, validly existing and in good standing under the laws of the
State of Delaware and has all corporate powers required to carry on its business
as now conducted. MediaOne is duly qualified to do business as a foreign
corporation and is in good standing in each jurisdiction where such
qualification is necessary, except for those jurisdictions where failure to be
so qualified, individually or in the aggregate, has not had and would not be
reasonably expected to have a MediaOne Material Adverse Effect. MediaOne has
heretofore delivered or made available to Comcast true and complete copies of
the certificate of incorporation and bylaws of MediaOne as currently in effect.

      SECTION 4.02. Corporate Authorization. (a) The execution, delivery and
performance by MediaOne of this Agreement and the consummation by MediaOne of
the transactions contemplated hereby are within MediaOne's corporate powers and,
except for the required approval of MediaOne's stockholders of this Agreement,
have been duly authorized by all necessary corporate action on the part of
MediaOne. This Agreement constitutes a valid and binding agreement of MediaOne,
enforceable against MediaOne in accordance with its terms, except (i) as the
same may be limited by applicable bankruptcy, insolvency, moratorium or similar
laws of general application relating to or affecting creditors' rights, and (ii)
for the limitations imposed by general principles of equity.

     (b) At a meeting duly called and held, MediaOne's Board of Directors has
unanimously: (i) determined that this Agreement and the transactions
contemplated hereby are advisable and fair to and in the best interests of
MediaOne's stockholders; (ii) approved and adopted this Agreement and the
transactions contemplated hereby; and (iii) resolved (subject to Section
6.02(b)) to recommend approval and adoption of this Agreement by its
stockholders.

      SECTION 4.03. Governmental Authorization. The execution, delivery and
performance by MediaOne of this Agreement and the consummation by MediaOne of
the transactions contemplated hereby require no action by or in respect of, or
filing with, any governmental body, agency, official or authority, domestic or
foreign (a "GOVERNMENTAL AUTHORITY"), other than: (i) notices to, or consents or
waivers from, the relevant Franchising Authorities in respect of the MediaOne
Franchises (the "FRANCHISE CONSENTS"), and the FCC in connection with a change
of control and/or assignment of the holder of the FCC licenses of MediaOne and
the MediaOne Subsidiaries ("LICENSE CONSENTS"); (ii) any filings as may be
required with the FCC or any Governmental Authority to obtain its consent to the
assumption by Comcast of the MediaOne Social Contract (the "SOCIAL CONTRACT
CONSENT"); (iii) the filing of a certificate of merger with respect to the
Merger with the Delaware Secretary of State and appropriate documents


                                21
<PAGE>
with the relevant authorities of other states in which MediaOne is qualified to
do business; (iv) the filing of articles of merger with respect to the Merger
with the Pennsylvania Department of State; (v) compliance with any applicable
requirements of the HSR Act; (vi) compliance with any applicable requirements of
the 1933 Act, 1934 Act, and any other applicable securities laws, whether state
or foreign; and (vii) any actions or filings the absence of which, individually
or in the aggregate, would not be reasonably expected to have a MediaOne
Material Adverse Effect or materially impair or delay the ability of MediaOne to
consummate the transactions contemplated by this Agreement.

      SECTION 4.04. Non-contravention. The execution, delivery and performance
by MediaOne of this Agreement and the consummation by MediaOne of the
transactions contemplated hereby do not and will not (i) contravene, conflict
with, or result in any violation or breach of any provision of the certificate
of incorporation or bylaws of MediaOne; (ii) assuming compliance with the
matters referred to in Section 4.03, contravene, conflict with or result in a
violation or breach of any provision of any applicable law, statute, ordinance,
rule, regulation, judgment, injunction, order, or decree; (iii) require any
consent or other action by any Person under, constitute a default (or an event
that, with or without notice or lapse of time or both, would constitute a
default) under, or cause or permit the termination, cancellation, acceleration,
triggering or other change of any right or obligation or the loss of any benefit
to which MediaOne or any MediaOne Subsidiary is entitled under (A) any provision
of any agreement or other instrument binding upon MediaOne or any MediaOne
Subsidiary or (B) any license, franchise, permit, certificate, approval or other
similar authorization held by, or affecting, or relating in any way to, the
assets or business of, MediaOne or any MediaOne Subsidiary; or (iv) result in
the creation or imposition of any Lien on any asset of MediaOne or any MediaOne
Subsidiary, other than such exceptions in the case of clauses (ii), (iii) and
(iv) as would not be, individually or in the aggregate, reasonably expected to
have a MediaOne Material Adverse Effect or materially impair or delay the
ability of MediaOne to consummate the transactions contemplated by this
Agreement.

      SECTION 4.05. Capitalization. (a) The authorized capital stock of MediaOne
consists of 2,000,000,000 shares of MediaOne Common Stock and 200,000,000 shares
of Preferred Stock, par value $1.00 per share, of which (i) 10,000,000 shares
have been designated Series A Junior Participating Cumulative Preferred Stock
(the "MEDIAONE SERIES A PREFERRED STOCK") and reserved for issuance upon the
exercise of rights distributed to holders of MediaOne Common Stock pursuant to
the MediaOne 1995 Rights Agreement, (ii) 50,000 shares have been designated
MediaOne Series C Preferred Stock, (iii) 20,000,000 shares have been designated
MediaOne Series D Preferred Stock, (iv) 1,000,000 shares have been designated
MediaOne Series E Preferred Stock and (v) 2,000,000 shares


                                22
<PAGE>
have been designated Series F Junior Participating Cumulative Preferred Stock
(the "MEDIAONE SERIES F PREFERRED STOCK") and reserved for issuance upon the
exercise of rights distributed to holders of MediaOne Common Stock pursuant to
the MediaOne 1999 Rights Agreement. As of the close of business on March 19,
1999, there were outstanding (i) 603,883,858 shares of MediaOne Common Stock
(inclusive of all shares of restricted stock granted under any compensatory
plans or arrangements), (ii) MediaOne Stock Options to purchase an aggregate of
31,146,625 shares of MediaOne Common Stock (of which options to purchase an
aggregate of 9,907,524 shares of MediaOne Common Stock were exercisable), (iii)
phantom shares or stock units issued under any stock option, compensation or
deferred compensation plan or arrangement with respect to an aggregate of
339,703 (as of February 26, 1999) shares of MediaOne Common Stock, (iv) no
shares of MediaOne Series A Preferred Stock, (iv) 50,000 shares of MediaOne
Series C Stock, (vi) 19,999,478 shares of MediaOne Series D Preferred Stock,
(vii) 996,562 shares of MediaOne Series E Preferred Stock and (viii) no shares
of MediaOne Series F Preferred Stock. All outstanding shares of capital stock of
MediaOne have been, and all shares that may be issued pursuant to any
compensatory plan or arrangement will be, when issued in accordance with the
respective terms thereof, duly authorized, validly issued, fully paid and
nonassessable.

     (b) Except as set forth in this Section 4.05 and for changes since March
19, 1999 (or February 26, 1999 in the case of phantom shares or stock units)
resulting from the exercise of employee stock options outstanding on such date
(and the grant or award of employee stock options in the ordinary course of
business and the exercise thereof) and the conversion of MediaOne Series D
Preferred Stock outstanding on such date, there are no outstanding (i) shares of
capital stock or voting securities of MediaOne, (ii) securities of MediaOne
convertible into or exchangeable for shares of capital stock or voting
securities of MediaOne or (iii) options or other rights to acquire from
MediaOne, or other obligation of MediaOne to issue any capital stock, voting
securities or securities convertible into or exchangeable for capital stock or
voting securities of MediaOne. There are no outstanding obligations of MediaOne
or any MediaOne Subsidiary to repurchase, redeem or otherwise acquire any of the
securities referred to in clauses (i), (ii) and (iii) above (collectively, the
"MEDIAONE SECURITIES").

      SECTION 4.06. Subsidiaries. (a) Each MediaOne Subsidiary is a corporation
or other legal entity duly organized, validly existing and in good standing
under the laws of its jurisdiction of organization and has all corporate,
partnership or other similar powers required to carry on its business as now
conducted, other than such exceptions as, individually or in the aggregate, have
not had and would not be reasonably expected to have a MediaOne Material


                                23
<PAGE>
Adverse Effect. Each MediaOne Subsidiary is duly qualified to do business as a
foreign corporation or other foreign legal entity and is in good standing in
each jurisdiction where such qualification is necessary, with such exceptions,
individually or in the aggregate, as have not had and would not be reasonably
expected to have a MediaOne Material Adverse Effect. The MediaOne Disclosure
Schedule sets forth a list of all MediaOne Significant Subsidiaries and their
respective jurisdictions of organization and identifies MediaOne's (direct or
indirect) percentage ownership interest therein.

     (b) All of the outstanding capital stock of, or other voting securities or
ownership interests in, each MediaOne Significant Subsidiary, is owned by
MediaOne, directly or indirectly, free and clear of any Lien and free of any
other limitation or restriction (including any restriction on the right to vote,
sell or otherwise dispose of such capital stock or other voting securities or
ownership interests). There are no outstanding (i) securities of MediaOne or any
MediaOne Subsidiary convertible into or exchangeable for shares of capital stock
or other voting securities or ownership interests in any MediaOne Significant
Subsidiary or (ii) options or other rights to acquire from MediaOne or any
MediaOne Subsidiary, or other obligation of MediaOne or any MediaOne Subsidiary
to issue any capital stock, or other voting securities or ownership interests
in, or any securities convertible into or exchangeable for any capital stock or
other voting securities or ownership interests in, any MediaOne Significant
Subsidiary. There are no outstanding obligations of MediaOne or any MediaOne
Significant Subsidiary to repurchase, redeem or otherwise acquire any of the
items referred to in clauses (i) and (ii) above.

      SECTION 4.07. SEC Filings. (a) MediaOne has delivered or made available to
Comcast: (i) MediaOne's annual report on Form 10-K for its fiscal year ended
December 31, 1997 and the MediaOne 10-K; (ii) its proxy or information
statements relating to meetings of, or actions taken without a meeting by, the
stockholders of MediaOne held since December 31, 1997; and (iii) all of its
other reports, statements, schedules and registration statements filed with the
SEC since December 31, 1997 (the documents referred to in this Section 4.07(a),
collectively, the "MEDIAONE SEC DOCUMENTS").

     (b) As of its filing date, each MediaOne SEC Document complied (or, in the
case of the MediaOne 10-K, will comply) as to form in all material respects with
the applicable requirements of the 1933 Act and the 1934 Act, as the case may
be.

     (c) As of its filing date (or in the case of the MediaOne 10-K, as of the
date hereof), each MediaOne SEC Document filed pursuant to the 1934 Act did not
contain any untrue statement of a material fact or omit to state any material


                                24
<PAGE>
fact necessary in order to make the statements made therein, in the light of the
circumstances under which they were made, not misleading.

     (d) Each MediaOne SEC Document that is a registration statement, as amended
or supplemented, if applicable, filed pursuant to the 1933 Act, as of the date
such registration statement or amendment became effective, did not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary to make the statements therein not misleading.

      SECTION 4.08. Financial Statements. The audited consolidated financial
statements and unaudited consolidated interim financial statements of MediaOne
included in the MediaOne SEC Documents fairly present, in all material respects,
in conformity with generally accepted accounting principles ("GAAP") applied on
a consistent basis (except as may be indicated in the notes thereto), the
consolidated financial position of MediaOne and its consolidated Subsidiaries as
of the dates thereof and their consolidated results of operations and cash flows
for the periods then ended (subject to normal year-end adjustments in the case
of any unaudited interim financial statements).

      SECTION 4.09. Information Supplied. The information supplied by MediaOne
for inclusion or incorporation in the registration statement on Form S-4 or any
amendment or supplement thereto pursuant to which shares of Comcast Common Stock
issuable in the Merger will be registered with the SEC (the "REGISTRATION
STATEMENT") shall not at the time the Registration Statement is declared
effective by the SEC contain any untrue statement of a material fact or omit to
state any material fact required to be stated therein or necessary in order to
make the statements therein, in light of the circumstances under which they were
made, not misleading. The information supplied by MediaOne for inclusion in the
joint proxy statement/prospectus or any amendment or supplement thereto (the
"PROXY STATEMENT") to be sent to the stockholders of MediaOne in connection with
their meeting to consider this Agreement and the Merger (the "MEDIAONE
STOCKHOLDERS' MEETING") and to the stockholders of Comcast in connection with
their meeting to consider the issuance of shares of Comcast Common Stock in the
Merger and, if necessary, the amendment to the articles of incorporation of
Comcast contemplated by Section 2.03 hereof (the "COMCAST STOCKHOLDERS' MEETING"
and together with the MediaOne Stockholders' Meeting, the "STOCKHOLDERS'
MEETINGS") shall not, on the date the Proxy Statement is first mailed to the
stockholders of MediaOne and Comcast or at the time of either of the
Stockholders' Meetings or at the Effective Time, contain any untrue statement of
a material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading.


                                25
<PAGE>
      SECTION 4.10. Absence of Certain Changes. Since the MediaOne Balance Sheet
Date, the business of MediaOne and the MediaOne Subsidiaries has been conducted
in the ordinary course consistent with past practices and there has not been:

     (a) any event, occurrence or development of a state of circumstances or
      facts which, individually or in the aggregate, has had or would be
      reasonably expected to have a MediaOne Material Adverse Effect; or

     (b) any action, event, occurrence or transaction that would have been
      prohibited by clause (a), (b), (c), (d), (f), (i) or (q) of the second
      sentence of Section 6.01 (or committed to do any of the foregoing) if this
      Agreement had been in effect as of the time thereof.

      SECTION 4.11. No Undisclosed Material Liabilities. There are no
liabilities or obligations of MediaOne or any MediaOne Subsidiary of any kind
whatsoever, whether accrued, contingent, absolute, determined, determinable or
otherwise, and there is no existing condition, situation or set of circumstances
that could be reasonably expected to result in such a liability or obligation,
other than:

     (a) liabilities or obligations disclosed and provided for in the MediaOne
      Balance Sheet or in the notes thereto or in MediaOne SEC Documents filed
      prior to the date hereof or in the MediaOne 10-K;

     (b) liabilities or obligations incurred in the ordinary course of business
      consistent with past practice since the MediaOne Balance Sheet Date; and

     (c) liabilities or obligations that, individually or in the aggregate have
      not had and would not be reasonably expected to have a MediaOne Material
      Adverse Effect.

      SECTION 4.12. Compliance with Laws and Court Orders. MediaOne and the
MediaOne Subsidiaries hold all licenses, franchises, certificates, consents,
permits, qualifications and authorizations from all Governmental Authorities
necessary for the lawful conduct of their business, except where the failure to
hold any of the foregoing, individually or in the aggregate, has not had and
would not be reasonably expected to have a MediaOne Material Adverse Effect.
MediaOne and each of the MediaOne Subsidiaries are and have been in compliance
with, and to the knowledge of MediaOne, are not under investigation with respect
to and have not been threatened to be charged with or given notice of any
violation of, any such license, franchise, certificate, consent, permit,
qualification or


                                26
<PAGE>
authorization, applicable law, statute, ordinance, rule, regulation, judgment,
injunction, order or decree, except for failures to comply or violations that,
individually or in the aggregate, have not had and would not be reasonably
expected to have a MediaOne Material Adverse Effect.

      SECTION 4.13. Litigation. There is no action, suit, investigation or
proceeding (or any basis therefor) pending against, or, to the knowledge of
MediaOne, threatened against or affecting, MediaOne or any MediaOne Subsidiary
or any of their respective properties before any court or arbitrator or before
or by any other Governmental Authority, that, individually or in the aggregate,
would be reasonably expected to have a MediaOne Material Adverse Effect.

      SECTION 4.14. Finders' Fees. Except for Lehman Brothers Inc. and Allen &
Co., Incorporated, there is no investment banker, broker, finder or other
intermediary that has been retained by or is authorized to act on behalf of
MediaOne or any MediaOne Subsidiary who might be entitled to any fee or
commission from Comcast, any of the Comcast Subsidiaries, MediaOne or any of the
MediaOne Subsidiaries in connection with the transactions contemplated by this
Agreement. A copy of Lehman Brothers Inc. engagement agreement has been provided
to Comcast.

      SECTION 4.15. Opinion of Financial Advisor. MediaOne has received an
opinion of Lehman Brothers Inc., financial advisor to MediaOne, to the effect
that, as of March 21, 1999, from a financial point of view, the Common Stock
Ratio is fair to the holders of MediaOne Common Stock.

      SECTION 4.16. Taxes. Except as set forth in the MediaOne Balance Sheet
(including the notes thereto) and except as would not be, individually or in the
aggregate, reasonably expected to have a MediaOne Material Adverse Effect, (i)
all MediaOne Tax Returns required to be filed with any taxing authority by, or
with respect to, MediaOne and the MediaOne Subsidiaries have been filed in
accordance with all applicable laws; (ii) MediaOne and the MediaOne Subsidiaries
have timely paid all Taxes shown as due and payable on the MediaOne Tax Returns
that have been so filed, and, as of the time of filing, the MediaOne Tax Returns
correctly reflected the facts regarding the income, business, assets,
operations, activities and the status of MediaOne and the MediaOne Subsidiaries
(other than Taxes which are being contested in good faith and for which adequate
reserves are reflected on the MediaOne Balance Sheet); (iii) MediaOne and the
MediaOne Subsidiaries have made provision for all Taxes payable by MediaOne and
the MediaOne Subsidiaries for which no MediaOne Tax Return has yet been filed;
(iv) the charges, accruals and reserves for Taxes with respect to MediaOne and
the MediaOne Subsidiaries reflected on the


                                27
<PAGE>
MediaOne Balance Sheet are adequate under GAAP to cover the Tax liabilities
accruing through the date thereof; (v) there is no action, suit, proceeding,
audit or claim now proposed or pending against or with respect to MediaOne or
any MediaOne Subsidiary in respect of any Tax where there is a reasonable
possibility of an adverse determination; (vi) the federal income Tax Returns of
MediaOne and the MediaOne Subsidiaries have been examined and settled with the
Internal Revenue Service (the "IRS") (or the applicable statutes of limitation
for the assessment of federal income Taxes for such periods have expired) for
all years through 1987; and (vii) there are no material Liens or encumbrances
for Taxes on any of the assets of MediaOne or any MediaOne Subsidiary except
liens for current Taxes not yet due. For purposes of this Agreement, "TAXES"
shall mean any and all taxes, charges, fees, levies or other assessments,
including, without limitation, all net income, gross income, gross receipts,
excise, stamp, real or personal property, ad valorem, withholding, social
security (or similar), unemployment, occupation, use, service, service use,
license, net worth, payroll, franchise, severance, transfer, recording,
employment, premium, windfall profits, environmental (including taxes under
Section 59A of the Code), customs duties, capital stock, profits, disability,
sales, registration, value added, alternative or add-on minimum, estimated or
other taxes, assessments or charges imposed by any federal, state, local or
foreign governmental entity and any interest, penalties, or additions to tax
attributable thereto. For purposes of this Agreement, "TAX RETURNS" shall mean
any return, report, form or similar statement required to be filed with respect
to any Tax (including any attached schedules), including, without limitation,
any information return, claim for refund, amended return or declaration of
estimated Tax.

      SECTION 4.17. Tax Opinions. There are no facts or circumstances relating
to MediaOne or, to the knowledge of MediaOne, U S WEST, that would prevent Weil,
Gotshal & Manges LLP from delivering the opinion referred to in Section 9.03(c)
as of the date hereof.

      SECTION 4.18. Employee Benefit Plans and Labor Matters. Except as have not
had and would not be reasonably expected to have, individually or in the
aggregate, a MediaOne Material Adverse Effect:

     (a) The MediaOne Disclosure Schedule contains a true and complete list, as
of the date hereof, of all MediaOne Employee Plans and all MediaOne Benefit
Arrangements. Copies of each MediaOne Employee Plan and each MediaOne Benefit
Arrangement (and, if applicable, related trust agreements) and all amendments
thereto and written interpretations thereof have been made available to Comcast
as of the date hereof or will have been made available to Comcast within thirty
days after the date hereof, together with the three most recent annual reports
(Form 5500 including, if applicable, Schedule B thereto) and


                                28
<PAGE>
the most recent actuarial valuation report prepared in connection with any
MediaOne Employee Plan.

     (b) No "accumulated funding deficiency," as defined in Section 412 of the
Code, has been incurred with respect to any MediaOne Employee Plan subject to
such Section 412, whether or not waived. No "reportable event" within the
meaning of Section 4043 of ERISA, and no event described in Section 4062 or 4063
of ERISA has occurred in connection with any MediaOne Employee Plan. Neither
MediaOne nor any ERISA Affiliate of MediaOne has (i) engaged in, or is a
successor or parent corporation to an entity that has engaged in, a transaction
described in Sections 4069 or 4212(c) of ERISA or (ii) incurred, or reasonably
expects to incur prior to the Effective Time (A) any liability under Title IV of
ERISA arising in connection with the termination of, or a complete or partial
withdrawal from, any plan covered or previously covered by Title IV of ERISA or
(B) any liability under Section 4971 of the Code that in either case could
become a liability of MediaOne, any MediaOne Subsidiary, Comcast or any of their
ERISA Affiliates after the Effective Time. If a "complete withdrawal" by
MediaOne and all of its ERISA Affiliates were to occur as of the Effective Time
with respect to all Multiemployer Plans, none of MediaOne, any MediaOne
Subsidiary or any of their ERISA Affiliates would incur any withdrawal liability
under Title IV of ERISA.

     (c) As of December 31, 1998, the fair market value of the assets of each
MediaOne Pension Plan (excluding for these purposes any accrued but unpaid
contributions) exceeded the present value of all benefits accrued under such
MediaOne Pension Plan determined on a termination basis using the assumptions
established by the PBGC as in effect on such date. As of December 31, 1998, the
aggregate unfunded liability of MediaOne and any MediaOne Subsidiary in respect
of all MediaOne Deferred Compensation Plans, computed using reasonable actuarial
assumptions and determined as if all benefits under such plans were vested and
payable as of such date, did not exceed $53,000,000.

     (d) Each MediaOne Employee Plan that is intended to be qualified under
Section 401(a) of the Code is the subject of a favorable qualification
determination letter issued by the IRS and to MediaOne's knowledge each such
MediaOne Employee Plan is so qualified.

     (e) There is no contract, plan or arrangement (written or otherwise)
covering any employee or former employee of MediaOne or any MediaOne Subsidiary
that, individually or collectively, could give rise to the payment of any amount
that would not be deductible pursuant to the terms of Sections 162(m) or 280G of
the Code.


                                29
<PAGE>
     (f) MediaOne has made available to Comcast as of the date hereof, or will
have made available to Comcast within thirty days after the date hereof, a list
and copies of each MediaOne International Plan. According to the actuarial
assumptions and valuations most recently used for the purpose of funding each
MediaOne International Plan (or, if the same has no such assumptions and
valuations or is unfunded, according to actuarial assumptions and valuations in
use by the PBGC on the date hereof), as of December 31, 1998 the total amount or
value of the funds available under such MediaOne International Plan to pay
benefits accrued thereunder or segregated in respect of such accrued benefits,
together with any reserve or accrual with respect thereto, exceeded the present
value of all benefits (actual or contingent) accrued as of such date of all
participants and past participants therein in respect of which MediaOne or any
MediaOne Subsidiary has or would have after the Effective Time any obligation.
From and after the Effective Time, Comcast and its Affiliates will get the full
benefit of any such funds, accruals or reserves for the benefit of covered
employees.

     (g) As of December 31, 1998, the aggregate amount of the accumulated
post-retirement benefit obligation under all MediaOne Employee Plans, MediaOne
Benefit Arrangements and MediaOne International Plans, as determined in
accordance with Statement of Financial Accounting Standards No.
106, did not exceed $25,000,000.

     (h) Each MediaOne Employee Plan, MediaOne Benefit Arrangement and MediaOne
International Plan has been maintained in compliance with its terms and with the
requirements prescribed by any and all applicable statutes, orders, rules and
regulations (including any special provisions relating to registration or
qualification where such Plan was intended so to be so registered or qualified)
and has been maintained in good standing with applicable regulatory authorities.

     (i) No employee or former employee of MediaOne or any MediaOne Subsidiary
will become entitled to any bonus, retirement, severance, job security or
similar benefit or enhanced such benefit (including acceleration of vesting or
exercise of an incentive award) as a result of the transactions contemplated
hereby (either alone or together with any other event).

     (j) Neither MediaOne nor any of the MediaOne Subsidiaries is a party to any
collective bargaining agreement. Neither MediaOne nor any of the MediaOne
Subsidiaries is involved in or threatened with any labor dispute, work stoppage,
labor strike, slowdown or grievance. To the knowledge of MediaOne, there is no
organizing effort or representation question at issue with respect to any
employee of MediaOne or any of the MediaOne Subsidiaries.


                                30
<PAGE>
      SECTION 4.19.  Environmental Matters.  (a) Except as have not had and
would not be reasonably expected to have, individually or in the aggregate, a
MediaOne Material Adverse Effect:

     (i) no notice, notification, demand, request for information, citation,
      summons or order has been received, no complaint has been filed, no
      penalty has been assessed, and no investigation, action, claim, suit,
      proceeding or review (or any basis therefor) is pending or, to the
      knowledge of MediaOne, is threatened by any Governmental Authority or
      other Person relating to or arising out of any Environmental Law;

    (ii) MediaOne is and has been in compliance with all Environmental Laws and
      all Environmental Permits; and

   (iii) there are no liabilities of or relating to MediaOne or any MediaOne
      Subsidiary of any kind whatsoever, whether accrued, contingent, absolute,
      determined, determinable or otherwise arising under or relating to any
      Environmental Law and there are no facts, conditions, situations or set of
      circumstances that could reasonably be expected to result in or be the
      basis for any such liability.

     (b) There have been no environmental investigations, studies, audits,
tests, reviews or other analyses conducted of which MediaOne has knowledge in
relation to the current or prior business of MediaOne or any MediaOne Subsidiary
or any property or facility now or previously owned or leased by MediaOne or any
MediaOne Subsidiary that reveal matters that, individually or in the aggregate,
have had or would reasonably be expected to have a MediaOne Material Adverse
Effect.

     (c) For purposes of this Section 4.19, the terms "MEDIAONE" and "MEDIAONE
SUBSIDIARY" shall include any entity that is, in whole or in part, a predecessor
of MediaOne or any MediaOne Subsidiary.

      SECTION 4.20. Intellectual Property. With such exceptions as, individually
or in the aggregate, have not had and would not be reasonably expected to have a
MediaOne Material Adverse Effect, each of MediaOne and the MediaOne Subsidiaries
own or have a valid license to use each trademark, service mark, trade name,
invention, patent, trade secret, copyright, know-how (including any
registrations or applications for registration of any of the foregoing) or any
other similar type of proprietary intellectual property right (collectively, the
"MEDIAONE INTELLECTUAL PROPERTY") necessary to carry on its business
substantially as currently conducted. Neither MediaOne nor any MediaOne


                                31
<PAGE>
Subsidiary has received any notice of infringement of or conflict with, and to
MediaOne's knowledge, there are no infringements of or conflicts with, the
rights of any Person with respect to the use of any MediaOne Intellectual
Property that, in either such case, individually or in the aggregate, have had
or would be reasonably expected to have, a MediaOne Material Adverse Effect.

      SECTION 4.21. Contracts. Neither MediaOne nor any of the MediaOne
Subsidiaries is a party to or bound by (i) any "material contract" (as such term
is defined in Item 601(b)(10) of Regulation S-K of the SEC) or any agreement,
contract or commitment that would be such a "material contract" but for the
exception for contracts entered into in the ordinary course of business, (ii)
any non-competition agreement or any other agreement or obligation which
materially limits or will materially limit MediaOne or any of the MediaOne
Subsidiaries (or after the Merger, Comcast or any of the Comcast Subsidiaries)
from engaging in the business of providing cable television, telephony or data
transmission services in the United States or the business of providing
programming content in the United States, the United Kingdom or Japan, (iii) any
agreement, contract or commitment to which TW or any of its Affiliates is a
party that amends the TWE Partnership Agreement or any related agreement or
affects the rights or obligations of MediaOne or any MediaOne Subsidiary with
respect to TWE or any TWE Subsidiary or (iv) any material agreement, contract or
commitment to which U S WEST or any of its Affiliates is a party that is not in
the ordinary course of business of MediaOne and the MediaOne Subsidiaries. With
such exceptions as, individually or in the aggregate, have not had, and would
not be reasonably expected to have, a MediaOne Material Adverse Effect, (x) each
of the contracts, agreements and commitments of the MediaOne and the MediaOne
Subsidiaries is valid and in full force and effect and (y) neither MediaOne nor
any of the MediaOne Subsidiaries has violated any provision of, or committed or
failed to perform any act which, with or without notice, lapse of time, or both,
would constitute a default under the provisions of any such contract, agreement
or commitment. To the knowledge of MediaOne, no counterparty to any such
contract, agreement or commitment has violated any provision of, or committed or
failed to perform any act which, with or without notice, lapse of time, or both
would constitute a default or other breach under the provisions of, such
contract, agreement or commitment, except for defaults or breaches which,
individually or in the aggregate, have not had, or would not reasonably be
expected to have, a MediaOne Material Adverse Effect. Neither MediaOne nor any
MediaOne Subsidiary is a party to, or otherwise a guarantor of or liable with
respect to, any interest rate, currency or other swap or derivative transaction,
other than any such transactions which are not material to the business of the
MediaOne Group. MediaOne has provided or made available to Comcast a copy of
each agreement described in item (i), (ii), (iii) or (iv) above.


                                32
<PAGE>
      SECTION 4.22. TWE. MediaOne, directly or indirectly, owns a 25.51%
priority capital and residual equity interest in TWE as described in the TWE
Partnership Agreement. As of the date hereof, to the knowledge of MediaOne,
there are no facts or circumstances with respect to TWE or the TWE Subsidiaries
that, individually or in the aggregate, have had or would be reasonably expected
to have a material adverse effect on MediaOne's investment in TWE.

      SECTION 4.23. Vote Required. The only vote of the holders of any class or
series of capital stock of MediaOne necessary to approve this Agreement and the
transactions contemplated hereby is the affirmative vote of the holders of a
majority of the outstanding shares of MediaOne Common Stock (the "MEDIAONE
STOCKHOLDERS' APPROVAL").

      SECTION 4.24. Antitakeover Statutes and Rights Agreement. (a) MediaOne has
taken all action necessary to exempt the Merger and this Agreement and the
transactions contemplated hereby from the restrictions of Section 203 of
Delaware Law, and, accordingly, neither such Section nor any other antitakeover
or similar statute or regulation applies or purports to apply to any such
transactions. No other "control share acquisition," "fair price," "moratorium"
or other antitakeover laws or regulations enacted under U.S. state or federal
laws apply to this Agreement or any of the transactions contemplated hereby.

     (b) MediaOne and the MediaOne Board have taken all necessary action to (i)
render the MediaOne 1995 Rights Agreement inapplicable to the Merger and the
other transactions contemplated by this Agreement, (ii) provide that (A) neither
Comcast nor any Comcast Subsidiary shall be deemed an Acquiring Person (as
defined in the MediaOne 1995 Rights Agreement) as a result of this Agreement or
any of the transactions contemplated hereby, (B) no 15% Ownership Date or
Distribution Date (each as defined in the MediaOne 1995 Rights Agreement) shall
be deemed to have occurred as a result of this Agreement or any of the
transactions contemplated hereby and (C) the rights issuable pursuant the
MediaOne 1995 Rights Agreement will not separate from the shares of MediaOne
Common Stock as a result of the approval, execution or delivery of this
Agreement or the consummation of the transactions contemplated hereby.

     (c) MediaOne and the MediaOne Board have taken all necessary action to (i)
render the MediaOne 1999 Rights Agreement inapplicable to the Merger and the
other transactions contemplated by this Agreement, (ii) provide that (A) neither
Comcast nor any Comcast Subsidiary shall be deemed an Acquiring Person (as
defined in the MediaOne 1999 Rights Agreement) as a result of this Agreement or
any of the transactions contemplated hereby, (B) no Distribution Date (as
defined in the MediaOne 1999 Rights Agreement) shall be deemed to


                                33
<PAGE>
have occurred as a result of this Agreement or the consummation of any of the
transactions contemplated hereby and (C) the rights issuable pursuant to the
MediaOne 1999 Rights Agreement will not separate from the shares of MediaOne
Common Stock, as a result of the approval, execution or delivery of this
Agreement or the consummation of the transactions contemplated hereby.



                                    ARTICLE 5
                    REPRESENTATIONS AND WARRANTIES OF COMCAST

      Except as set forth in the Comcast Disclosure Schedule or as disclosed in
the Comcast SEC Documents filed prior to the date hereof, Comcast represents and
warrants to MediaOne that:

      SECTION 5.01. Corporate Existence and Power. Comcast is a corporation duly
incorporated and subsisting under the laws of its jurisdiction of incorporation
and has all corporate powers required to carry on its business as now conducted.
Comcast is duly qualified to do business as a foreign corporation and is in good
standing in each jurisdiction where such qualification is necessary except for
those jurisdictions where failure to be so qualified, individually or in the
aggregate, has not had and would not be reasonably expected to have a Comcast
Material Adverse Effect. Comcast has heretofore delivered or made available to
MediaOne true and complete copies of the articles of incorporation and bylaws of
Comcast, as currently in effect.

      SECTION 5.02. Corporate Authorization. (a) The execution, delivery and
performance by Comcast and the consummation by Comcast of the transactions
contemplated hereby are within the corporate powers of Comcast, and have been
duly authorized by all necessary corporate action, except for the required
approval of Comcast's shareholders of the issuance of Comcast Common Stock in
the Merger and the amendment to the articles of incorporation of Comcast
contemplated by Section 2.03. This Agreement constitutes a valid and binding
agreement of Comcast enforceable against Comcast in accordance with its terms,
except (i) as the same may be limited by applicable bankruptcy, insolvency,
moratorium or similar laws of general application relating to or affecting
creditors' rights, and (ii) for the limitations imposed by general principles of
equity.

     (b) Comcast's Board of Directors, at a meeting duly called and held, has
unanimously: (i) determined that this Agreement and the transactions
contemplated hereby are fair to and in the best interests of Comcast's


                                34
<PAGE>
stockholders; (ii) approved this Agreement and the transactions contemplated
hereby; and (iii) resolved to recommend approval of the issuance of the Comcast
Common Stock in the Merger and the amendment to the articles of incorporation of
Comcast as contemplated by Section 2.03.

      SECTION 5.03. Governmental Authorization. The execution, delivery and
performance by Comcast of this Agreement and the consummation by Comcast of the
transactions contemplated hereby require no action by or in respect of, or
filing with, any Governmental Authority, other than: (i) the filing of a
certificate of merger with respect to the Merger with the Delaware Secretary of
State and appropriate documents with the relevant authorities of other states in
which Comcast is qualified to do business; (ii) the filing of articles of merger
with respect to the Merger with the Pennsylvania Department of State; (iii) the
filing of an amendment to the articles of incorporation of Comcast with the
Pennsylvania Department of State with respect to the amendment contemplated by
Section 2.03; (iv) compliance with any applicable requirements of the HSR Act;
(v) compliance with any applicable requirements of the 1933 Act, the 1934 Act
and any other applicable securities laws, whether state or foreign; and (vi) any
actions or filings the absence of which, individually or in the aggregate, would
not be reasonably expected to have a Comcast Material Adverse Effect or
materially impair or delay the ability of Comcast to consummate the transactions
contemplated by this Agreement.

      SECTION 5.04. Non-contravention. The execution, delivery and performance
by Comcast of this Agreement and the consummation by Comcast of the transactions
contemplated hereby do not and will not (i) subject to the amendment to the
Comcast articles of incorporation contemplated by Section 2.03, contravene,
conflict with, or result in any violation or breach of any provision of the
articles of incorporation or bylaws of Comcast; (ii) assuming compliance with
the matters referred to in Section 5.03, contravene, conflict with or result in
a violation or breach of any provision of any law, rule, regulation, judgment,
injunction, order or decree; (iii) require any consent or other action by any
Person under, constitute a default under (or an event that, with or without
notice or lapse of time or both, would constitute a default), or cause or permit
the termination, cancellation, acceleration, triggering or other change of any
right or obligation or the loss of any benefit to which Comcast or any of the
Comcast Subsidiary is entitled under (A) any provision of any agreement or other
instrument binding upon Comcast or any Comcast Subsidiary or (B) any license,
franchise, permit, certificate, approval or other similar authorization held by,
or affecting, or relating in any way to, the assets or business of Comcast or
any Comcast Subsidiary; or (iv) result in the creation or imposition of any Lien
on any asset of Comcast or any Comcast Subsidiary, other than such exceptions in
the case of clauses (ii), (iii) and (iv) as would not be, individually or in the
aggregate,


                                35
<PAGE>
reasonably expected to have a Comcast Material Adverse Effect or materially
impair the ability of Comcast to consummate the transactions contemplated by
this Agreement.

      SECTION 5.05. Capitalization. (a) The authorized capital stock of Comcast
consists of (i) 200,000,000 shares of Class A Common Stock, par value $1.00 per
share (the "COMCAST CLASS A COMMON STOCK"), (ii) 50,000,000 shares of Class B
Common Stock, par value $1.00 per share (the "COMCAST CLASS B COMMON STOCK"),
(iii) as of the date hereof, 500,000,000 shares of Comcast Common Stock, and as
of the Effective Time between 2,500,000,000 and 5,000,000,000 shares of Comcast
Common Stock and (iv) 20,000,000 shares of Preferred Stock, of which (A) 6,370
shares have been designated Series A Convertible Preferred Stock (the "COMCAST
SERIES A PREFERRED STOCK") and (B) 1,419,099 have been designated Series B
Convertible Preferred Stock (the "COMCAST SERIES B PREFERRED STOCK"). As of the
close of business on March 19, 1999, there were outstanding (i) 31, 499,438
shares of Comcast Class A Common Stock, (ii) 9,444,375 shares of Comcast Class B
Common Stock, (iii) 329,188,843 shares of Comcast Common Stock, (iv) employee
and non-employee director stock options to purchase an aggregate of 18,878,064
shares of Comcast Common Stock (of which options to purchase an aggregate of
5,974,689 shares of Comcast Class A Common Stock were exercisable), (v) 6,370
shares of Comcast Series A Preferred Stock and (vi) 540,689.82 shares of Comcast
Series B Preferred Stock. All outstanding shares of capital stock of Comcast
have been duly authorized and validly issued and are fully paid and
nonassessable.

     (b) Except as set forth in this Section 5.05 and for changes since March
19, 1999 resulting from (w) the April 20 Dividend, (x) the exercise of employee
and non-employee director stock options outstanding on such date (and the grant
or award of employee and non-employee director stock options in the ordinary
course of business and the exercise thereof), (y) the conversion of shares of
Comcast Series A Preferred Stock outstanding on such date and (z) the conversion
of shares of Comcast Series B Preferred Stock outstanding on such date, there
are no outstanding (i) shares of capital stock or voting securities of Comcast,
(ii) securities of Comcast convertible into or exchangeable for shares of
capital stock or voting securities of Comcast or (iii) options or other rights
to acquire from Comcast or other obligations of Comcast to issue, any capital
stock, voting securities or securities convertible into or exchangeable for
capital stock or voting securities of Comcast. There are no outstanding
obligations of Comcast or any Comcast Subsidiary to repurchase, redeem or
otherwise acquire any of the securities referred to in clause (i), (ii) or (iii)
above (collectively, the "COMCAST SECURITIES").



                                36
<PAGE>
     (c) The Comcast Securities to be issued as part of the Common Stock
Consideration, the Series C Consideration, Series D Consideration and Series E
Consideration (or upon exercise of Adjusted Options) have been duly authorized
and, when issued and delivered in accordance with the terms of this Agreement
(or the Adjusted Options, as the case may be), will have been validly issued and
will be fully paid and nonassessable and the issuance thereof is not subject to
any preemptive or other similar right. Prior to the Effective Time, Comcast will
reserve for issuance the Comcast Common Stock to be issued upon exercise of the
Adjusted Options.

      SECTION 5.06. Subsidiaries. (a) Each Comcast Subsidiary is a corporation
or other legal entity duly organized, validly existing and in good standing
under the laws of its jurisdiction of organization, has all corporate
partnership or other similar powers required to carry on its business as now
conducted other than such exceptions as, individually or in the aggregate, have
not had and would not reasonably be expected to have a Comcast Material Adverse
Effect. Each Comcast Subsidiary is duly qualified to do business as a foreign
corporation or other foreign legal entity and is in good standing in each
jurisdiction where such qualification is necessary, with such exceptions,
individually or in the aggregate, as have not had and would not be reasonably
expected to have a Comcast Material Adverse Effect. The Comcast Disclosure
Schedule sets forth a list of all Comcast Significant Subsidiaries and their
respective jurisdictions of incorporation and identifies Comcast's (direct or
indirect) percentage ownership interest therein.

     (b) All of the outstanding capital stock of, or other voting securities or
ownership interests in, each Comcast Significant Subsidiary is owned by Comcast,
directly or indirectly, free and clear of any Lien and free of any other
limitation or restriction (including any restriction on the right to vote, sell
or otherwise dispose of such capital stock or other voting securities or
ownership interests). There are no outstanding (i) securities of Comcast or any
Comcast Subsidiary convertible into or exchangeable for shares of capital stock
or other voting securities or ownership interests in any Comcast Significant
Subsidiary or (ii) options or other rights to acquire from Comcast or any
Comcast Subsidiary, or other obligations of Comcast or any Comcast Subsidiary to
issue, any capital stock or other voting securities or ownership interests in,
or any securities convertible into or exchangeable for any capital stock or
other voting securities or ownership interests in, any Comcast Significant
Subsidiary. There are no outstanding obligations of Comcast or any Comcast
Significant Subsidiary to repurchase, redeem or otherwise acquire any of the
securities referred to in clauses (i) or (ii) above.

      SECTION 5.07.  SEC Filings.  (a) Comcast has delivered or made available
to MediaOne (i) Comcast's annual reports on Form 10-K for its fiscal years ended



                                37
<PAGE>
December 31, 1998, 1997 and 1996, (ii) its proxy or information statements
relating to meetings of, or actions taken without a meeting by Comcast's
stockholders held since December 31, 1997, and (iii) all of its other reports,
statements, schedules and registration statements filed with the SEC since
December 31, 1997 (the documents referred to in this Section 5.07(a),
collectively, the "COMCAST SEC DOCUMENTS").

     (b) As of its filing date, each Comcast SEC Document complied as to form in
all material respects with the applicable requirements of the 1933 Act and 1934
Act, as the case may be.

     (c) As of its filing date, each Comcast SEC Document filed pursuant to the
1934 Act did not contain any untrue statement of a material fact or omit to
state any material fact necessary in order to make the statements made therein,
in the light of the circumstances under which they were made, not misleading.

     (d) Each Comcast SEC Document that is a registration statement, as amended
or supplemented, if applicable, filed pursuant to the 1933 Act, as of the date
such registration statement or amendment became effective, did not contain any
untrue statement of a material fact or omit to state any material fact required
to be stated therein or necessary to make the statements therein not misleading.

      SECTION 5.08. Financial Statements. The audited consolidated financial
statements and unaudited consolidated interim financial statements of Comcast
included in the Comcast SEC Documents fairly present, in all material respects,
in conformity with GAAP applied on a consistent basis (except as may be
indicated in the notes thereto), the consolidated financial position of Comcast
and its consolidated Subsidiaries as of the dates thereof and their consolidated
results of operations and cash flows for the periods then ended (subject to
normal year-end adjustments in the case of any unaudited interim financial
statements).

      SECTION 5.09. Information Supplied. The information supplied by Comcast
for inclusion in the Registration Statement shall not at the time the
Registration Statement is declared effective by the SEC contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the circumstances under which they were made, not misleading. The information
supplied by Comcast for inclusion in the Proxy Statement to be sent to the
stockholders of MediaOne in connection with the MediaOne Stockholders' Meeting
and to the stockholders of Comcast in connection with the Comcast Stockholders'
Meeting shall not, on the date the Proxy Statement is first mailed to the
stockholders of MediaOne and Comcast or at the time either of the Stockholders'
Meetings or at the Effective Time, contain any untrue statement of


                                38
<PAGE>
a material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they were made, not misleading.

      SECTION 5.10. Absence of Certain Changes. Since the Comcast Balance Sheet
Date, the business of Comcast and the Comcast Subsidiaries has been conducted in
the ordinary course consistent with past practices. Since the Comcast Balance
Sheet Date, there has not been:

     (a) any event, occurrence or development of a state of circumstances or
      facts which, individually or in the aggregate, has had or would be
      reasonably expected to have a Comcast Material Adverse Effect; or

     (b) any action, event, occurrence or transaction that would have been
      prohibited by Section 7.01 if this Agreement had been in effect as of the
      time thereof.

      SECTION 5.11. No Undisclosed Material Liabilities. There are no
liabilities or obligations of Comcast or any Comcast Subsidiary of any kind
whatsoever, whether accrued, contingent, absolute, determined, determinable or
otherwise, and there is no existing condition, situation or set of circumstances
that could be reasonably expected to result in such a liability or obligation,
other than:

     (a) liabilities or obligations disclosed and provided for in the Comcast
      Balance Sheet or in the notes thereto or in the Comcast SEC Documents
      filed prior to the date hereof;

     (b) liabilities or obligations incurred in the ordinary course of business
      consistent with past practice since the Comcast Balance Sheet Date; or

     (c) liabilities or obligations that, individually or in the aggregate have
      not had and would not be reasonably expected to have a Comcast Material
      Adverse Effect.

      SECTION 5.12. Compliance with Laws and Court Orders. Comcast and the
Comcast Subsidiaries hold all licenses, franchises, certificates, consents,
permits, qualifications and authorizations from all Governmental Authorities
necessary for the lawful conduct of their business, except where the failure to
hold any of the foregoing, individually or in the aggregate, has not had and
would not be reasonably expected to have a Comcast Material Adverse Effect.
Comcast and each of the Comcast Subsidiaries are, and have been in compliance
with, and to


                                39
<PAGE>
the knowledge of Comcast, are not under investigation with respect to and have
not been threatened to be charged with or given notice of any violation of, any
such license, franchise, certificate, consent, permit, qualification or
authorization, applicable law, statute, ordinance, rule, regulation, judgment,
injunction, order or decree, except for failures to comply or violations that,
individually or in the aggregate, have not had and would not be reasonably
expected to have a Comcast Material Adverse Effect.

      SECTION 5.13. Litigation. There is no action, suit, investigation or
proceeding (or any basis therefor) pending against, or, to the knowledge of
Comcast, threatened against or affecting, Comcast, any Comcast Subsidiary, or
any of their respective properties before any court or arbitrator or before or
by any other Governmental Authority, that, individually or in the aggregate,
would be reasonably expected to have a Comcast Material Adverse Effect.

      SECTION 5.14. Finders' Fees. Except for Salomon Smith Barney Inc., a copy
of whose engagement agreement has been provided to MediaOne, whose fees will be
paid by Comcast, there is no investment banker, broker, finder or other
intermediary that has been retained by or is authorized to act on behalf of
Comcast or any Comcast Subsidiary who might be entitled to any fee or commission
from Comcast or any of the Comcast Subsidiaries upon consummation of the
transactions contemplated by this Agreement.

      SECTION 5.15. Opinion of Financial Advisor. Comcast has received an
opinion of Salomon Smith Barney Inc., financial advisor to Comcast, to the
effect that, as of March 21, 1999, the Common Stock Ratio is fair to Comcast
from a financial point of view.

      SECTION 5.16. Taxes. Except as set forth in the Comcast Balance Sheet
(including the notes thereto) and except as would not be, individually or in the
aggregate, reasonably expected to have a Comcast Material Adverse Effect: (i)
all Comcast Tax Returns required to be filed with any taxing authority by, or
with respect to, Comcast and the Comcast Subsidiaries have been filed in
accordance with all applicable laws; (ii) Comcast and the Comcast Subsidiaries
have timely paid all Taxes shown as due and payable on the Comcast Tax Returns
that have been so filed, and, as of the time of filing, the Comcast Tax Returns
correctly reflected the facts regarding the income, business, assets,
operations, activities and the status of Comcast and the Comcast Subsidiaries
(other than Taxes which are being contested in good faith and for which adequate
reserves are reflected on the Comcast Balance Sheet); (iii) Comcast and the
Comcast Subsidiaries have made provision for all Taxes payable by Comcast and
the Comcast Subsidiaries for which no Comcast Tax Return has yet been filed;
(iv) the charges, accruals and reserves for Taxes with respect to Comcast and
the Comcast Subsidiaries reflected


                                40
<PAGE>
on the Comcast Balance Sheet are adequate under GAAP to cover the Tax
liabilities accruing through the date thereof; (v) there is no action, suit,
proceeding, audit or claim now proposed or pending against or with respect to
Comcast or any Comcast Subsidiary in respect of any Tax where there is a
reasonable possibility of an adverse determination; (vi) the federal income Tax
Returns of Comcast and the Comcast Subsidiaries have been examined and settled
with the IRS (or the applicable statutes of limitation for the assessment of
federal income Taxes for such periods have expired) for all years through 1991;
and (vii) there are no material Liens or encumbrances for Taxes on any of the
assets of Comcast or any Comcast Subsidiary except liens for current Taxes not
yet due.

      SECTION 5.17. Tax Opinions. There are no facts or circumstances relating
to Comcast that would prevent Davis Polk & Wardwell from delivering the opinion
referred to in Section 9.02(c) as of the date hereof.

      SECTION 5.18.  Employee Benefit Plans and Labor Matters.  Except as
have not and would not be reasonably expected to have, individually or in the
aggregate, a Comcast Material Adverse Effect:

     (a) The Comcast Disclosure Schedule contains a true and complete list, as
of the date hereof, of all Comcast Employee Plans and all Comcast Benefit
Arrangements. Copies of each Comcast Employee Plan and each Comcast Benefit
Arrangements (and, if applicable, related trust agreements) and all amendments
thereto and written interpretations thereof have been made available to MediaOne
as of the date hereof or will be made available to MediaOne within thirty days
after the date hereof, together with the three most recent annual reports (Form
5500 including, if applicable, Schedule B thereto) and the most recent actuarial
valuation report prepared in connection with any Comcast Employee Plan.

     (b) No "accumulated funding deficiency," as defined in Section 412 of the
Code, has been incurred with respect to any Comcast Employee Plan subject to
such Section 412, whether or not waived. No "reportable event" within the
meaning of Section 4043 of ERISA, and no event described in Section 4062 or 4063
of ERISA has occurred in connection with any Comcast Employee Plan. Neither
Comcast nor any ERISA Affiliate of Comcast has (i) engaged in, or is a successor
or parent corporation to an entity that has engaged in, a transaction described
in Sections 4069 or 4212(c) of ERISA or (ii) incurred, or reasonably expects to
incur prior to the Effective Time (A) any liability under Title IV of ERISA
arising in connection with the termination of, or a complete or partial
withdrawal from, any plan covered or previously covered by Title IV of ERISA or
(B) any liability under Section 4971 of the Code that in either case could
become a liability of Comcast, any Comcast Subsidiary, MediaOne or any of their
ERISA


                                41
<PAGE>
Affiliates after the Effective Time. If a "complete withdrawal" by Comcast and
all of its ERISA Affiliates were to occur as of the Effective Time with respect
to all Multiemployer Plans, none of Comcast, any Comcast Subsidiary or any of
their ERISA Affiliates would incur any withdrawal liability under Title IV of
ERISA.

     (c) As of December 31, 1998, the fair market value of the assets of each
Comcast Pension Plan (excluding for these purposes any accrued but unpaid
contributions) exceeded the present value of all benefits accrued under such
Comcast Pension Plan determined on a termination basis using the assumptions
established by the PBGC as in effect on such date. As of December 31, 1998, the
aggregate unfunded liability of Comcast and any Comcast Subsidiary in respect of
all Comcast Deferred Compensation Plans, computed using reasonable actuarial
assumptions and determined as if all benefits under such plans were vested and
payable as of such date, did not exceed $260,000,000.

     (d) Each Comcast Employee Plan that is intended to be qualified under
Section 401(a) of the Code is the subject of a favorable qualification
determination letter issued by the IRS and to Comcast's knowledge each such
Comcast Employee Plan is so qualified.

     (e) There is no contract, plan or arrangement (written or otherwise)
covering any employee or former employee of Comcast or any Comcast Subsidiary
that, individually or collectively, could give rise to the payment of any amount
contingent on the transactions contemplated by hereby that would not be
deductible pursuant to the terms of Sections 162(m) or 280G of the Code.

     (f) Comcast has made available to MediaOne as of the date hereof, or will
make available to MediaOne within thirty days after the date hereof, a list and
copies of each material Comcast International Plan. According to the actuarial
assumptions and valuations most recently used for the purpose of funding each
Comcast International Plan (or, if the same has no such assumptions and
valuations or is unfunded, according to actuarial assumptions and valuations in
use by the PBGC on the date hereof), as of December 31, 1998 the total amount or
value of the funds available under such Comcast International Plan to pay
benefits accrued thereunder or segregated in respect of such accrued benefits,
together with any reserve or accrual with respect thereto, exceeded the present
value of all benefits (actual or contingent) accrued as of such date of all
participants and past participants therein in respect of which Comcast or any
Comcast Subsidiary has or would have after the Effective Time any obligation.
From and after the Effective Time, MediaOne and its Affiliates will get the full
benefit of any such funds, accruals or reserves.



                                42
<PAGE>
     (g) As of December 31, 1998, the aggregate amount of the accumulated
post-retirement benefit obligation under all Comcast Employee Plans, Comcast
Benefit Arrangements and Comcast International Plans, as determined in
accordance with the Statement of Financial Accounting Standards No. 106, did not
exceed $50,000,000.

     (h) Each Comcast Employee Plan, Comcast Benefit Arrangement and Comcast
International Plan has been maintained in compliance with its terms and with the
requirements prescribed by any and all applicable statutes, orders, rules and
regulations (including any special provisions relating to registration or
qualification plans where such Plan was intended so to be so registered or
qualified) and has been maintained in good standing with applicable regulatory
authorities.

     (i) No employee or former employee of Comcast or any Comcast Subsidiary
will become entitled to any bonus, retirement, severance, job security or
similar benefit or enhanced such benefit (including acceleration of vesting or
exercise of an incentive award) as a result of the transactions contemplated
hereby (either alone or together with any other event).

     (j) Neither Comcast nor any of the Comcast Subsidiaries is a party to any
collective bargaining agreement. Neither Comcast nor any of the Comcast
Subsidiaries is involved in or threatened with any labor dispute, work stoppage,
labor strike, slowdown or grievance. To the knowledge of Comcast, there is no
organizing effort or representation question at issue with respect to any
employee of Comcast or any of the Comcast Subsidiaries.

      SECTION 5.19.  Environmental Matters.  (a) Except as have not had and
would not be reasonably expected to have, individually or in the aggregate, a
Comcast Material Adverse Effect:

     (i) no notice, notification, demand, request for information, citation,
      summons or order has been received, no complaint has been filed, no
      penalty has been assessed, and no investigation, action, claim, suit,
      proceeding or review (or any basis therefor) is pending or, to the
      knowledge of Comcast, is threatened by any Governmental Authority or other
      Person relating to or arising out of any Environmental Law;

    (ii) Comcast is and has been in compliance with all Environmental Laws and
      all Environmental Permits; and

   (iii) there are no liabilities of or relating to Comcast or any Comcast
      Subsidiary of any kind whatsoever, whether accrued, contingent,


                                43
<PAGE>
      absolute, determined, determinable or otherwise arising under or relating
      to any Environmental Law and there are no facts, conditions, situations or
      set of circumstances that could reasonably be expected to result in or be
      the basis for any such liability.

     (b) There have been no environmental investigations, studies, audits,
tests, reviews or other analyses conducted of which Comcast has knowledge in
relation to the current or prior business of Comcast or any Comcast Subsidiary
or any property or facility now or previously owned or leased by Comcast or any
Comcast Subsidiary that reveal matters that, individually or in the aggregate,
have had or would reasonably be expected to have a Comcast Material Adverse
Effect.

     (c) For purposes of this Section 5.19, the terms "COMCAST" and "COMCAST
SUBSIDIARY" shall include any entity that is, in whole or in part, a predecessor
of Comcast or any Comcast Subsidiary.

      SECTION 5.20. Intellectual Property. With such exceptions as, individually
or in the aggregate, have not had and would not be reasonably expected to have a
Comcast Material Adverse Effect, each of Comcast and the Comcast Subsidiaries
own or have a valid license to use each trademark, service mark, trade name,
invention, patent, trade secret, copyright, know-how (including any
registrations or applications for registration of any of the foregoing) or any
other similar type of proprietary intellectual property right (collectively, the
"COMCAST INTELLECTUAL PROPERTY") necessary to carry on its business
substantially as currently conducted. Neither Comcast nor any Comcast Subsidiary
has received any notice of infringement of or conflict with, and to Comcast's
knowledge, there are no infringements of or conflicts with, the rights of any
Person with respect to the use of any Comcast Intellectual Property that, in
either such case, individually or in the aggregate, have had or would be
reasonably expected to have, a Comcast Material Adverse Effect.

      SECTION 5.21. Contracts. Neither Comcast nor any of the Comcast
Subsidiaries is a party to or bound by (i) any "material contract" (as such term
is defined in Item 601(b)(10) of Regulation S-K of the SEC) or any agreement,
contract or commitment that would be such a "material contract" but for the
exception for contracts entered into in the ordinary course of business, (ii)
any non-competition agreement or any other agreement or obligation which
materially limits or will materially limit Comcast or the Comcast Subsidiaries
(or after the Merger, MediaOne or the MediaOne Subsidiaries) from engaging in
the business of providing cable television, telephony or data transmission
services in the United States or the business of providing programming content
or (iii) any contract or agreement with Sural Corporation, Brian L. Roberts,
Ralph J. Roberts or any of their Affiliates other than (A) compensation
arrangements (including life


                                44
<PAGE>
insurance arrangements) and (B) other contracts and agreements not in excess of
$100,000 per annum in the aggregate. With such exceptions as, individually or in
the aggregate, have not had, and would not reasonably be expected to have, a
Comcast Material Adverse Effect, (i) each of the contracts, agreements and
commitments of Comcast and the Comcast Subsidiaries is valid and in full force
and effect and (ii) neither Comcast nor any of the Comcast Subsidiaries has
violated any provision of, or committed or failed to perform any act which, with
or without notice, lapse of time, or both, would constitute a default under the
provisions of, any such contract, agreement or commitment. To the knowledge of
Comcast, no counterparty to any such contract, agreement or commitment has
violated any provision of, or committed or failed to perform any act which, with
or without notice, lapse of time, or both would constitute a default or other
breach under the provisions of such contract, agreement or commitment, except
for defaults or breaches which, individually or in the aggregate, have not had,
or would not reasonably be expected to have, a Comcast Material Adverse Effect.
Neither Comcast nor any Comcast Subsidiary is a party to, or otherwise a
guarantor of or liable with respect to, any interest rate, currency or other
swap or derivative transaction, other than any such transactions which are not
material to the business of Comcast and the Comcast Subsidiaries, taken as a
whole. Comcast has provided or made available to MediaOne a copy of each
agreement of the type described in item (i) or (ii) above.

      SECTION 5.22. Vote Required. The only vote of the holders of any class or
series of capital stock necessary to approve the issuance of Comcast Common
Stock in the Merger is the affirmative vote of a majority of the votes cast by
holders of Comcast Class A Common Stock and Comcast Class B Common Stock (voting
as a single class) at the Comcast Stockholders' Meeting. The only vote of the
holders of any class or series of capital stock necessary to approve the
amendment to the articles of incorporation contemplated by Section 2.03 is the
affirmative vote of a majority of the votes of the outstanding shares of the
Comcast Class A Common Stock and the Comcast Class B Common Stock (voting as a
single class).

      SECTION 5.23.  MediaOne Securities.  Neither Comcast nor any of the
Comcast Subsidiaries owns any securities of MediaOne.



                                45
<PAGE>
                                    ARTICLE 6
                              COVENANTS OF MEDIAONE

      MediaOne agrees that:

      SECTION 6.01. MediaOne Interim Operations. Except as set forth in the
MediaOne Disclosure Schedule or as otherwise expressly contemplated hereby,
without the prior written consent of Comcast, from the date hereof until the
Effective Time, MediaOne shall, and shall cause each of the MediaOne
Subsidiaries to, conduct its business in all material respects in the ordinary
course consistent with past practice and use all reasonable efforts to: (i)
preserve intact its present business organization; (ii) keep available the
services of its key officers and key employees; (iii) maintain in effect all
material foreign, federal, state and local licenses, approvals and
authorizations, including, without limitation, all material licenses and permits
that are required for MediaOne or any MediaOne Subsidiary to carry on its
business and (iv) preserve existing relationships with its material partners,
lenders, suppliers and others having material business relationships with it so
that the business of MediaOne and the MediaOne Subsidiaries shall not be
impaired in any material respect at the Effective Time. Without limiting the
generality of the foregoing, except as set forth in the MediaOne Disclosure
Schedule or as otherwise expressly contemplated by this Agreement, from the date
hereof until the Effective Time, without the prior written consent of Comcast,
MediaOne shall not, nor shall it permit any MediaOne Subsidiary to:

     (a)   amend its articles of incorporation or by-laws or other
      applicable governing instrument;

     (b)   amend any material term of any of its outstanding securities;

     (c) split, combine, subdivide or reclassify any shares of its capital stock
      or other equity interests or declare, set aside or pay any dividend or
      other distribution (whether in cash, stock or property or any combination
      thereof) in respect of its capital stock, or redeem, repurchase or
      otherwise acquire or offer to redeem, repurchase, or otherwise acquire any
      of its securities or any securities of MediaOne or any MediaOne
      Subsidiary, except for (i) regular dividends on outstanding preferred
      stock or trust preferred securities pursuant to the terms of such
      securities and (ii) dividends paid by any MediaOne Subsidiary that is,
      directly or indirectly, wholly owned by MediaOne;



                                46
<PAGE>
     (d) adopt a plan or agreement of complete or partial liquidation,
      dissolution, merger, consolidation, restructuring, recapitalization or
      other material reorganization (other than a merger or consolidation
      between wholly owned MediaOne Subsidiaries);

     (e) issue, deliver or sell, or authorize the issuance, delivery or sale of,
      any shares of its capital stock of any class or other equity interests or
      any securities convertible into or exercisable for, or any rights,
      warrants or options to acquire, any such capital stock or other equity
      interests, other than (i) the issuance of shares of MediaOne Common Stock
      upon the exercise of stock options in accordance with their present terms,
      (ii) issuances pursuant to the conversion of convertible securities
      outstanding on the date hereof and (iii) the granting of options to
      acquire shares of MediaOne Common Stock in accordance with Section 6.01(n)
      of the MediaOne Disclosure Schedule;

     (f) incur any capital expenditures except as set forth in the MediaOne
      Disclosure Schedule;

     (g) except for capital expenditures, which shall be governed by clause (f),
      acquire (by merger, consolidation, acquisition of stock or assets or
      otherwise), directly or indirectly, any assets, other than (i) pursuant to
      agreements in effect as of the date hereof, (ii) assets used in the
      ordinary course of business of MediaOne and the MediaOne Subsidiaries in a
      manner that is consistent with past practice or (iii) assets having a fair
      market value not exceeding $25,000,000 in the aggregate;

     (h) other than pursuant to agreements in effect as of the date hereof,
      sell, lease, license, encumber or otherwise transfer any domestic assets
      having a fair market value exceeding $25,000,000 in any one transaction or
      series of related transactions or $100,000,000 in the aggregate;

     (i) incur, assume or guarantee any indebtedness for borrowed money other
      than in the ordinary course of business and in amounts and on terms
      consistent with past practices;

     (j) make any loan, advance or capital contributions to or investment in any
      Person other than loans, advances or capital contributions to or
      investments in its wholly owned Subsidiaries;

     (k) except for capital expenditures, which shall be governed by clause (f),
      engage in or enter into any transaction or commitment, enter


                                47
<PAGE>
      into any contract or agreement, or relinquish or amend in any material
      respect any contract or other right, in any case, (i) material to the
      MediaOne Group, taken as a whole, other than transactions and commitments
      in the ordinary course of business consistent with past practices and
      those contemplated by this Agreement or (ii) other than in the ordinary
      course of business consistent with past practices and other than
      programming agreements, for the provision of goods or services that
      provides for payments in excess of $25,000,000 per agreement (or
      $100,000,000 for all agreements for similar goods or services);

     (l) after March 29, 1999, enter into any new programming agreement unless
      it has used all commercially reasonable efforts to include within such
      agreement a provision permitting it to terminate such agreement without
      penalty at the Effective Time if the counterparty thereto has a
      programming agreement with Comcast or any Comcast Subsidiary;

     (m) enter into any commitment, agreement or arrangement for the acquisition
      of high speed modems or digital set-top boxes in quantities exceeding
      MediaOne's expected needs for such modems and boxes through June 30, 2001;

     (n) amend in any material respects the TWE Partnership Agreement or enter
      into or amend any material agreement with TW or its Affiliates with
      respect to TWE or any TWE Subsidiary, or (except as prohibited by the TWE
      Partnership Agreement, as required by the fiduciary duties of MediaOne to
      the TWE Partnership or as an exercise by MediaOne of its rights with
      respect to the TWE Management Committee) waive or exercise any material
      rights with respect to TWE or any TWE Subsidiary or consent to any
      material transaction by or with respect to TWE or any TWE Subsidiary;

     (o) enter into any agreement or arrangement that materially limits or
      otherwise materially restricts MediaOne, any MediaOne Subsidiary or any of
      their respective Affiliates or any successor thereto or that could, after
      the Effective Time, materially limit or restrict Comcast, any Comcast
      Subsidiary, the Surviving Corporation or any of their Affiliates, from
      engaging in the business of providing cable television, telephony or data
      transmission services in the United States or the business of providing
      programming content in the United States, the United Kingdom or Japan;

     (p) except as required pursuant to existing written, binding agreements or
      as otherwise mandated by law as of the date hereof (i) enter


                                48
<PAGE>
      into any commitment to provide any severance or termination pay to (or
      amend any existing arrangement with) any director, officer or employee of
      MediaOne or any MediaOne Subsidiary, (ii) increase the benefits payable
      under any existing severance or termination pay policy or employment
      agreement (other than as may be increased by function of the existing
      terms of any such policy or agreement), (iii) enter into any employment,
      deferred compensation or other similar agreement (or amend any such
      existing agreement) with any director, officer or employee of MediaOne or
      any MediaOne Subsidiary, (iv) establish, adopt or amend (except as
      required by applicable law) any collective bargaining, bonus,
      profit-sharing, thrift, pension, retirement, deferred compensation,
      compensation, stock option, restricted stock or other benefit plan or
      arrangement covering any director, officer or employee of MediaOne or any
      MediaOne Subsidiary, except that MediaOne and the MediaOne Subsidiaries
      may amend any such existing agreement or plan or adopt a successor plan or
      arrangement to the extent mandated by applicable law or to the extent that
      such amendment would not result in a more than de minimis increase in the
      costs or liabilities under such agreement or plan, (v) other than in the
      ordinary course of business consistent with past practice or as required
      by any agreement in effect as of the date hereof, increase the
      compensation, bonus or other benefits payable to any director, officer or
      employee of MediaOne or any MediaOne Subsidiary or (vi) amend the terms of
      any outstanding option to purchase shares in MediaOne Common Stock;

     (q) change (i) its methods of accounting or accounting practices in any
      material respect, except as required by concurrent changes in U.S.
      GAAP or by law or (ii) its fiscal year;

     (r) enter into or amend in any material respect (i) any material joint
      venture, partnership or other similar arrangement, (ii) any agreement for
      the provision by one or more third parties of telephony, data or other
      services through the facilities of one or more of the MediaOne Systems,
      which is exclusive or which cannot be terminated within two years of the
      Effective Time without any penalty, or (iii) any agreement providing for
      the right to use the facilities of one or more of the MediaOne Systems,
      which is exclusive or which cannot be terminated within two years of the
      Effective Time without any penalty;

     (s) settle, or propose to settle, any litigation, investigation,
      arbitration, proceeding or other claim that is material to the MediaOne
      Group taken as a whole;



                                49
<PAGE>
     (t) other than in the ordinary course of business consistent with past
      practice, make any material tax election or enter into any settlement or
      compromise of any material tax liability;

     (u) take any action that would make any representation or warranty of
      MediaOne hereunder inaccurate in any material respect at the Effective
      Time; or

     (v)   agree or commit to do any of the foregoing;

provided that the limitations set forth in clauses 6.01(a) through 6.01(v) shall
not apply to any transaction between MediaOne and any MediaOne Subsidiary that
is wholly owned by MediaOne or between any such wholly owned MediaOne
Subsidiaries.

      SECTION 6.02. MediaOne Stockholders' Meeting; Proxy Material. (a) MediaOne
shall cause the MediaOne Stockholders' Meeting to be duly called and held as
soon as reasonably practicable for the purpose of voting on the approval and
adoption of this Agreement and the Merger. In connection with such meeting,
MediaOne will (i) subject to Section 6.02(b), use its best efforts to obtain the
necessary approvals by its stockholders of this Agreement and the transactions
contemplated hereby and (ii) otherwise comply with all legal requirements
applicable to such meeting.

     (b) Except as provided below, the Board of Directors of MediaOne shall
recommend approval and adoption of this Agreement and the Merger by MediaOne's
stockholders. The Board of Directors of MediaOne shall be permitted to withdraw,
or modify in a manner adverse to Comcast, its recommendation to its
stockholders, but only if: (i) in the case of a withdrawal, modification or
change that occurs in the Initial Period, MediaOne has complied with the terms
of Section 6.03, including, without limitation, the requirement in Section
6.03(b) that it notify Comcast promptly after its receipt of any Acquisition
Proposal; (ii) in the case of a withdrawal, modification or change that occurs
in the Initial Period, a Superior Proposal is pending at the time the Board of
Directors determines to take any such action; (iii) the Board of Directors
determines in good faith by a majority vote, on the basis of the advice of
MediaOne's outside counsel, that it must take such action to comply with its
fiduciary duties under applicable law; and (iv) in the case of a withdrawal,
modification or change that occurs after the Initial Period, MediaOne shall have
delivered to Comcast a prior written notice advising Comcast that it intends to
take such action and describing its reasons for taking such action (such notice
to be delivered not less than two days prior to the time such action is taken).
Unless this Agreement is previously terminated in accordance with Article 10,
MediaOne


                                50
<PAGE>
shall submit this Agreement to its stockholders at the MediaOne Stockholders'
Meeting even if the MediaOne Board of Directors determines at any time after the
date hereof that is no longer advisable or recommends that the MediaOne
stockholders reject it.

      SECTION 6.03. No Solicitation. (a) From the date hereof until the
termination hereof, MediaOne will not, and will cause the MediaOne Subsidiaries
and the officers, directors, employees, investment bankers, attorneys,
accountants, consultants or other agents or advisors of MediaOne and the
MediaOne Subsidiaries not to, directly or indirectly: (i) take any action to
solicit, initiate, facilitate or encourage the submission of any Acquisition
Proposal; (ii) other than in the ordinary course of business and not related to
an Acquisition Proposal, engage in any discussions or negotiations with, or
disclose any non-public information relating to MediaOne or any MediaOne
Subsidiary or afford access to the properties, books or records of MediaOne or
any MediaOne Subsidiary to, any Person who is known by MediaOne to be
considering making, or has made, an Acquisition Proposal; (iii) (A) amend or
grant any waiver or release under any standstill or similar agreement with
respect to any class of equity securities of MediaOne (a "STANDSTILL
AGREEMENT"), (B) to the fullest extent permitted by Delaware Law, amend or grant
any waiver or release or approve any transaction or redeem rights under the
MediaOne Rights Agreements, (C) approve any transaction under Section 203 of the
Delaware Law or Article IX of the MediaOne certificate of incorporation or (D)
approve of any Person's becoming an "interested stockholder" under Section 203
of Delaware Law or (iv) enter into any agreement with respect to an Acquisition
Proposal (other than a confidentiality agreement as described in item (C)
below); provided that during the Initial Period, MediaOne may negotiate or
otherwise engage in substantive discussions with, and furnish non-public
information and provide a waiver or release of a Standstill Agreement (so long
as such waiver or release is limited to the Initial Period) to, any Person (a
"THIRD PARTY") who delivers an Acquisition Proposal that the MediaOne Board of
Directors reasonably believes will lead to a Superior Proposal if: (A) MediaOne
has complied with the terms of this Section 6.03, including without limitation,
the requirement in Section 6.03(b) that it notify Comcast promptly after its
receipt of any Acquisition Proposal; (B) the Board of Directors of MediaOne
determines in good faith by a majority vote, on the basis of advice from
MediaOne's outside legal counsel, that it must take such action to comply with
its fiduciary duties under applicable law; and (C) the Third Party executes a
confidentiality agreement with terms no less favorable in the aggregate to
MediaOne than those contained in the Confidentiality Agreement dated as of March
16, 1999 between MediaOne and Comcast (the "CONFIDENTIALITY AGREEMENT"). Nothing
contained in this Agreement shall prevent the Board of Directors of MediaOne
from complying with Rule 14e-2 and Rule 14d-9 under the 1934 Act with regard to
an Acquisition Proposal; provided that the Board of


                                51
<PAGE>
Directors of MediaOne shall not recommend that the stockholders of MediaOne
tender their shares in connection with a tender offer except to the extent the
Board of Directors of MediaOne by a majority vote determines in its good faith
judgment that such a recommendation is required to comply with the fiduciary
duties of the Board of Directors of MediaOne to shareholders under applicable
law, after receiving the advice of outside legal counsel. As used herein, the
term "INITIAL PERIOD" means the 45-day period commencing on the date hereof;
provided that if MediaOne has delivered to Comcast a notice pursuant to Section
10.01(d)(iii)(A) after the 24th day after the date hereof but prior to the end
of such 45-day period, the Initial Period shall be extended for such period (not
to exceed 21 days from the date of delivery of such notice) as the negotiations
with the Third Party making the Superior Proposal referred to in such notice
shall continue but during any such period after the 45th day from the date
hereof the proviso to the first sentence of this Section 6.03(a) shall apply
only to such Third Party.

     (b) MediaOne will notify Comcast promptly (but in no event later than 24
hours) after receipt by MediaOne (or any of its advisors) of any Acquisition
Proposal, or of any request (other than in the ordinary course of business and
not related to an Acquisition Proposal) for non-public information relating to
MediaOne or any of the MediaOne Subsidiaries or for access to the properties,
books or records of MediaOne or any MediaOne Subsidiary by any Person who is
known to be considering making, or has made, an Acquisition Proposal. MediaOne
shall provide such notice orally and in writing and shall identify the Person
making, and the terms and conditions of, any such Acquisition Proposal,
indication or request. MediaOne shall keep Comcast fully informed, on a prompt
basis (but in any event no later than 24 hours), of the status and details of
any such Acquisition Proposal, indication or request. MediaOne shall, and shall
cause the MediaOne Subsidiaries and the directors, employees and other agents of
MediaOne and the MediaOne Subsidiaries to, cease immediately and cause to be
terminated all activities, discussions or negotiations, if any, with any Persons
conducted prior to the date hereof with respect to any Acquisition Proposal.

      SECTION 6.04. Redemption of Preferred Stock. As promptly as it is
permitted to do so under the terms thereof, MediaOne will call for redemption
and redeem the MediaOne Series C Preferred Stock and the MediaOne Series D
Preferred Stock in accordance with the terms thereof.

      SECTION 6.05.  Channel Launches.  MediaOne agrees to consult with
Comcast regarding its plans and overall strategy for channel launches.



                                52
<PAGE>
                                    ARTICLE 7
                              COVENANTS OF COMCAST

      Comcast agrees that:

      SECTION 7.01. Comcast Interim Operations. Except as set forth in the
Comcast Disclosure Schedule or as otherwise expressly contemplated hereby,
without the prior consent of MediaOne, from the date hereof until the Effective
Time, Comcast shall, and shall cause each of the Comcast Subsidiaries to,
conduct their business in all material respects in the ordinary course
consistent with past practice and use all reasonable efforts to (i) preserve
intact its present business organization, (ii) keep available the services of
its key officers and key employees, (iii) maintain in effect all material
foreign, federal, state and local licenses, approvals and authorizations,
including, without limitation, all material licenses and permits that are
required for Comcast or any Comcast Subsidiary to carry on its business and (iv)
preserve existing relationships with its material partners, lenders, suppliers
and others having material business relationships with it so that the business
of Comcast and the Comcast Subsidiaries shall not be impaired in any material
respect at the Effective Time. Without limiting the generality of the foregoing,
except as set forth in the Comcast Disclosure Schedule or as otherwise expressly
contemplated by this Agreement, from the date hereof until the Effective Time,
without the prior written consent of MediaOne, Comcast shall not, nor shall it
permit any Comcast Subsidiary to:

     (a)   amend Comcast's articles of incorporation or by-laws;

     (b)   amend any material terms of any of its outstanding securities;

     (c) split, combine, subdivide or reclassify any shares of Comcast's capital
      stock or declare, set aside or pay any dividend or other distribution
      (whether in cash, stock or property or any combination thereof) in respect
      of Comcast's capital stock, or redeem, repurchase or otherwise acquire or
      offer to redeem, repurchase, or otherwise acquire any of Comcast's
      securities, except for (i) the April 20 Dividend, (ii) a quarterly cash
      dividend having a record date of March 4, 1999 in the amount of (A) $.0233
      per share of Comcast Class A Common Stock, (B) $.0233 per share of Comcast
      Class B Common Stock and (C) $.0233 per share of Comcast Common Stock,
      (ii) regular dividends on outstanding preferred stock pursuant to the
      terms of such securities and (iii) dividends paid by any Comcast
      Subsidiary to Comcast or any Comcast Subsidiary that is, directly or
      indirectly, wholly owned by Comcast;



                                53
<PAGE>
     (d) take any action that would or would be reasonably likely to prevent or
      materially impair the ability of MediaOne to consummate the transactions
      contemplated by this Agreement;

     (e) issue, deliver or sell, or authorize the issuance, delivery or sale of,
      any shares of its capital stock of any class or any securities convertible
      into or exercisable for, or any rights, warrants or options to acquire,
      any such capital stock, other than (i) the issuance of shares of common
      stock of Comcast upon the exercise of stock options in accordance with
      their present terms, (ii) issuances pursuant to the conversion of
      convertible securities outstanding on the date hereof and (iii) the
      granting of options to acquire shares of common stock of Comcast in the
      ordinary course of business consistent with past practice;

     (f) change (i) its methods of accounting or accounting practices in any
      material respect except as required by concurrent changes in U.S.
      GAAP or by law or (ii) its fiscal year;

     (g) enter into or acquire any new line of business that (i) is material to
      the Comcast Group taken as a whole and (ii) is not closely related to the
      provision of broadband communications services or the provision of
      programming content;

     (h) take any action that would result in Comcast ceasing to control Quick
      or ceasing to consolidate Quick for accounting purposes;

     (i) incur indebtedness outside of the ordinary course or for acquisitions
      unless, in the reasonable judgment of Comcast, such incurrence is not
      reasonably likely to result in the rating accorded Comcast's senior debt
      by Moody's Investor's Service and Standard & Poor's Rating Services to be
      non-investment grade;

     (j) engage in any (i) merger, consolidation, share exchange, business
      combination, reorganization, recapitalization or other similar transaction
      unless the shareholders of Comcast prior to such transaction own, directly
      or indirectly, a majority of the equity interests in the surviving or
      resulting corporation, (ii) transaction as a result of which any third
      party acquires, directly or indirectly, an equity interest representing
      greater than 25% of the voting securities of Comcast or any Comcast
      Significant Subsidiary (other than Comcast Teleport, Inc.) or (iii)
      disposition, directly or indirectly, of assets, securities or ownership
      interests representing an amount equal to or greater than 10% of the basic
      cable subscribers of the Comcast Group, other than the transactions


                                54
<PAGE>
      contemplated by this Agreement or permitted pursuant to Section 7.01
      hereof or asset swaps (unless such asset swaps, together with other
      dispositions, result in a 10% decrease in the basic cable subscribers of
      the Comcast Group);

     (k) take any action that would make any representation or warranty of
      Comcast hereunder inaccurate in any respect at the Effective Time; or

     (l) agree or commit to do any of the foregoing.

      SECTION 7.02. Comcast Stockholders' Meeting. Comcast shall cause the
Comcast Stockholders' Meeting to be duly called and held as soon as reasonably
practicable for the purpose of voting on approval (the "COMCAST STOCKHOLDERS'
APPROVAL") of the issuance of shares of Comcast Common Stock in the Merger and
the amendment to the articles of incorporation of Comcast contemplated by
Section 2.03 hereof. The Board of Directors of Comcast shall recommend approval
of the issuance of Comcast Common Stock in the Merger by Comcast's stockholders
and, if necessary, the amendment to the articles of incorporation of Comcast
contemplated by Section 2.03 hereof.

      SECTION 7.03. Director and Officer Liability. (a) The Surviving
Corporation shall indemnify and hold harmless and advance expenses to the
present and former officers, directors and employees of MediaOne and the
MediaOne Subsidiaries, and each person who prior to the Effective Time becomes
an officer, director or employee of MediaOne (each an "INDEMNIFIED PERSON"), in
respect of acts or omissions by them in their capacities as such occurring at or
prior to the Effective Time (including, without limitation, for acts or
omissions occurring in connection with this Agreement and the consummation of
the transactions contemplated hereby) to the same extent provided under
MediaOne's certificate of incorporation and bylaws in effect on the date hereof
("INDEMNIFIED LOSSES"); provided that such indemnification shall be subject to
any limitation imposed from time to time under applicable law. Without limiting
the generality of the foregoing, the Indemnified Losses shall include reasonable
costs of prosecuting a claim under this Section 7.03(a). The Surviving
Corporation shall periodically advance or reimburse each Indemnified Person for
all reasonable fees and expenses of counsel constituting Indemnified Losses as
such fees and expenses are incurred; provided that such Indemnified Person shall
agree to promptly repay to the Surviving Corporation the amount of any such
reimbursement if it shall be judicially determined by judgment or order not
subject to further appeal or discretionary review that such Indemnified Person
is not entitled to be indemnified by the Surviving Corporation in connection
with such matter. In the event that the Surviving Corporation sells, transfers
or leases


                                55
<PAGE>
all or substantially all of its assets or is not a surviving corporation in any
merger, consolidation or other business combination in which it may enter with
any Person, the Surviving Corporation shall, as a condition of any such
transaction, cause such purchaser or such surviving corporation, as the case may
be, to assume the Surviving Corporation's obligations under this Section 7.03
upon the consummation of any such transaction.

      (b) For six years after the Effective Time, the Surviving Corporation
shall provide officers' and directors' liability insurance in respect of acts or
omissions occurring prior to the Effective Time (including, without limitation,
for acts or omissions occurring in connection with this Agreement and the
consummation of the transactions contemplated hereby) covering each such
Indemnified Person currently covered by MediaOne's officers' and directors'
liability insurance policy on terms with respect to coverage and amount
(including with respect to the payment of attorney's fees) no less favorable
than those of such policy in effect on the date hereof (which policy has been
provided by MediaOne to Comcast); provided that if the aggregate annual premiums
for such insurance during such period shall exceed 300% of the per annum rate of
premium paid by MediaOne as of the date hereof for such insurance, then the
Surviving Corporation shall provide a policy with the best coverage as shall
then be available at 300% of such rate.

     (c) The rights of each Indemnified Person and its heirs and legal
representatives under this Section 7.03 shall be in addition to any rights such
Person may have under the certificate of incorporation or bylaws of MediaOne or
any MediaOne Subsidiary, or under Delaware Law or any other applicable laws.
These rights shall survive consummation of the Merger and are intended to
benefit, and shall be enforceable by, each Indemnified Person.

      SECTION 7.04. Quotation of Stock. Comcast shall use its best efforts to
cause (i) the shares of Comcast Common Stock and Comcast Series D Preferred
Stock to be issued in connection with the Merger and reserved for issuance in
connection with the Adjusted Options to be approved for quotation on Nasdaq,
subject to official notice of issuance and (ii) the securities of MediaOne and
the MediaOne Subsidiaries that are listed on the NYSE to continue to be listed
on the NYSE (or, at Comcast's election and to the extent permitted under the
terms of such securities, Nasdaq) following the Merger.

      SECTION 7.05. Comcast Board of Directors. Immediately prior to the
Effective Time, the Board of Directors of Comcast will take all necessary action
to expand the size of its Board of Directors by four members and to appoint Mr.
Charles M. Lillis (or, in the event Mr. Lillis is unable to serve, such other
person as may be designated by MediaOne and reasonably satisfactory to Comcast)
and


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<PAGE>
three other persons who are currently serving as MediaOne Directors and who are
selected by MediaOne and reasonably satisfactory to Comcast (such four persons,
the "NEW DIRECTORS") to the Comcast Board of Directors. From the Effective Time
until and including the second annual meeting of the stockholders of Comcast
taking place after the Effective Time, (i) the Board of Directors of Comcast
will nominate the New Directors for reelection to the Comcast Board of Directors
at each subsequent annual or special meeting of the stockholders of Comcast at
which the New Directors' terms expire, (ii) at least one of the New Directors
will be a member of each committee of the Board of Directors of Comcast (and for
so long as Mr. Lillis is a New Director, he will be the New Director that is a
member of the executive and nominating committees) and (iii) the Comcast Board
of Directors shall establish a committee composed of the New Directors which
committee shall have the authority to make decisions as provided in Sections
7.03, 7.05 and 7.06 hereto and Section 5.3 of the Voting Agreement (the "NEW
DIRECTORS COMMITTEE"). If one or more of the New Directors is unable to serve
during such period, Mr. Lillis (or if he is no longer serving, the other
remaining New Directors by majority vote) will select a replacement or
replacements which shall be reasonably satisfactory to Comcast. These rights
shall survive the consummation of the Merger and are intended to benefit, and
shall be enforceable by, the New Directors.

      SECTION 7.06.  Employee Matters.  (a) Comcast shall and shall cause the
Comcast Subsidiaries to:

     (i) honor the terms of all MediaOne Employee Plans, MediaOne Benefit
      Arrangements and MediaOne International Plans, and cause the Surviving
      Corporation and its Subsidiaries to pay the benefits required under the
      terms of such plans and arrangements, in each case subject to Section
      7.06(c);

    (ii) until December 31, 2001 (the "BENEFITS MAINTENANCE PERIOD"), with
      respect to employees of MediaOne or any of MediaOne Subsidiaries at the
      Effective Time ("TRANSFERRED EMPLOYEES"), provide a level of employee
      benefits and aggregate compensation which is substantially comparable in
      the aggregate to the level of employee benefits and aggregate compensation
      provided by MediaOne and MediaOne Subsidiaries as of the Effective Time
      (other than the benefits provided under any severance or termination
      benefit plans and arrangements of MediaOne or any MediaOne Subsidiary);

   (iii) until the second anniversary of the Effective Time, to continue,
      without any adverse change, each MediaOne and MediaOne Subsidiary
      Severance Plan identified as such in the MediaOne Disclosure


                                57
<PAGE>
      Schedule (as amended in accordance with Section 6.01(p) of the
      MediaOne Disclosure Schedule); and

    (iv) until the fifth anniversary of the Effective Time (and for the life of
      certain individuals as identified in the MediaOne Disclosure Schedule),
      continue without adverse change the existing retiree medical, dental and
      life insurance benefit plan coverage for Transferred Employees and the
      retired employees of MediaOne and the employees and retired employees of
      Time Warner Telecom who participate in the MediaOne Pension Plan and are
      eligible to participate in the MediaOne retiree welfare benefit plans,
      each of whom are currently, or during such period will become, eligible to
      receive such benefits.

     (b) If Transferred Employees are included in any benefit plan or
arrangement of Comcast or the Comcast Subsidiaries, including without
limitation, any plan or arrangement providing vacation benefits, the Transferred
Employees shall receive credit for service prior to the Effective Time with
MediaOne and the MediaOne Subsidiaries and their predecessors to the same extent
such service was counted under similar MediaOne Employee Plans, MediaOne Benefit
Arrangements and MediaOne International Plans for purposes of determining
eligibility to participate and vesting and benefit accrual (except that with
respect to benefit accrual, such service shall not be counted to the extent that
it would result in a duplication of benefits). If Transferred Employees or their
dependents are included in any medical, dental or health plan other than the
plan or plans they participated in at the Effective Time (a "SUCCESSOR PLAN"),
any such Successor Plan shall not include pre-existing condition exclusions,
except to the extent such exclusions were applicable under any similar MediaOne
Employee Plan at the Effective Time.

     (c) Except as otherwise specifically set forth above, nothing contained
herein shall be construed as requiring Comcast or any Comcast Subsidiary to
continue any specific Employee Plan, Benefit Arrangement or International Plan,
or to continue the employment of any specific person, provided however that any
changes that Comcast or any Comcast Subsidiary may make to any such Employee
Plan, Benefit Arrangement or International Plan are permitted by the terms of
the applicable Employee Plan, Benefit Arrangement or International Plan and
under any applicable law.




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<PAGE>
                                    ARTICLE 8
                        COVENANTS OF COMCAST AND MEDIAONE
 
      The parties hereto agree that:

      SECTION 8.01. Best Efforts. (a) Subject to the terms and conditions of
this Agreement, MediaOne and Comcast will cooperate with each other and use
their best efforts to promptly (i) take, or cause to be taken, all actions and
to do, or cause to be done, all things necessary, proper or advisable under
applicable laws and regulations to consummate the transactions contemplated by
this Agreement as soon as practicable, including, without limitation, preparing
and filing as promptly as practicable all documentation to effect all necessary
filings, notices, petitions, statements, registrations, submissions of
information, applications and other documents, (ii) obtain and maintain all
approvals, consents, registrations, permits, authorizations and other
confirmations required to be obtained from any third party that are necessary,
proper or advisable to consummate the Merger and the other transactions
contemplated by this Agreement and (iii) obtain and maintain waivers of all
Purchase Rights (as defined below). Subject to applicable laws relating to the
exchange of information, MediaOne and Comcast shall have the right to review in
advance, and to the extent practicable each will consult the other on, all the
information relating to MediaOne and the MediaOne Subsidiaries or Comcast and
the Comcast Subsidiaries, as the case may be, that appears in any filing made
with, or written materials submitted to, any third party and/or any Governmental
Authority in connection with the Merger and the other transactions contemplated
by this Agreement. Within 30 days of the date hereof, MediaOne will provide to
Comcast a list of all Franchise Consents, all License Consents and all rights
that any Person may have under the terms of the MediaOne Franchises to purchase
all or any portion of a MediaOne System as a result of the transactions
contemplated hereby ("PURCHASE RIGHTS").

     (b) In furtherance and not in limitation of the foregoing, each of Comcast
and MediaOne agrees to (i) make an appropriate filing of a Notification and
Report Form pursuant to the HSR Act with respect to the transactions
contemplated hereby as promptly as practicable and in any event within ten
Business Days of the date hereof, (ii) supply as promptly as practicable any
additional information and documentary material that may be requested pursuant
to the HSR Act and (iii) use best efforts to complete the review process under
the HSR Act to permit the consummation of the Merger including, but not limited
to, causing the expiration or termination of the applicable waiting periods
under the HSR Act as soon as practicable.



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<PAGE>
      SECTION 8.02. Proxy Statement; Registration Statement. (a) As promptly as
practicable after the execution of this Agreement, Comcast and MediaOne shall
prepare and file the Proxy Statement with the SEC, and Comcast shall prepare and
file the Registration Statement (in which the Proxy Statement will be included)
with the SEC. Comcast and MediaOne shall use their reasonable best efforts to
cause the Registration Statement to become effective under the 1933 Act as soon
after such filing as practicable and to keep the Registration Statement
effective as long as is necessary to consummate the Merger. The Proxy Statement
shall include the recommendation of the Board of Directors of MediaOne in favor
of approval and adoption of this Agreement and the Merger, except to the extent
the Board of Directors of MediaOne shall have withdrawn or modified its approval
or recommendation of this Agreement as permitted by Section 6.02(b), and the
recommendation of the Board of Directors of Comcast in favor of approval of the
issuance of Comcast Common Stock in the Merger and, if necessary, the amendment
to the Comcast articles of incorporation contemplated by Section 2.03 hereof.
Comcast shall use its reasonable best efforts to cause the Proxy Statement to be
mailed to its stockholders, and MediaOne shall use its reasonable best efforts
to cause the Proxy Statement to be mailed to its stockholders, in each case as
promptly as practicable after the Registration Statement becomes effective. The
parties shall promptly provide copies, consult with each other and prepare
written responses with respect to any written comments received from the SEC
with respect to the Proxy Statement and the Registration Statement and advise
one another of any oral comments received from the SEC. The Registration
Statement and the Proxy Statement shall comply as to form in all material
respects with the rules and regulations promulgated by the SEC under the 1933
Act and the 1934 Act, respectively.

     (b) Comcast and MediaOne shall make all necessary filings with respect to
the Merger and the transactions contemplated thereby under the 1933 Act and the
1934 Act and applicable state blue sky laws and the rules and regulations
thereunder. Each party will advise the other, promptly after it receives notice
thereof, of the time when the Registration Statement has become effective or any
supplement or amendment has been filed, the issuance of any stop order, the
suspension of the qualification of the Comcast Common Stock issuable in
connection with the Merger for offering or sale in any jurisdiction, or any
request by the SEC for amendment of the Proxy Statement or the Registration
Statement or comments thereon and responses thereto or requests by the SEC for
additional information. No amendment or supplement to the Proxy Statement or the
Registration Statement shall be filed without the approval of both parties
hereto, which approval shall not be unreasonably withheld or delayed. If at any
time prior to the Effective Time, any information relating to Comcast or
MediaOne, or any of their respective Affiliates, officers or directors, should
be discovered by Comcast or MediaOne that should be set forth in an amendment or
supplement to


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<PAGE>
the Registration Statement or the Proxy Statement, so that such documents would
not include any misstatement of a material fact or omit to state any material
fact necessary to make the statements therein, in light of the circumstances
under which they were made, not misleading, the party which discovers such
information shall promptly notify the other parties hereto and an appropriate
amendment or supplement describing such information shall be promptly filed with
the SEC and, to the extent required by law, disseminated to the stockholders of
Comcast and MediaOne.

      SECTION 8.03. Public Announcements. So long as this Agreement is in
effect, MediaOne and Comcast will consult with each other before issuing any
press release or making any public statement with respect to this Agreement or
the transactions contemplated hereby and, except as may be required by
applicable law or any listing agreement with any national securities exchange,
will not issue any such press release or make any such public statement without
the prior consent of the other party, which consent shall not be unreasonably
withheld. Notwithstanding the foregoing, any such press release or public
statement as may be required by applicable law or any listing agreement with any
national securities exchange or Nasdaq may be issued without such consent, if
the party making such release or statement has used its reasonable efforts to
consult with the other party.

      SECTION 8.04. Further Assurances. At and after the Effective Time, the
officers and directors of the Surviving Corporation will be authorized to
execute and deliver, in the name and on behalf of MediaOne, any deeds, bills of
sale, assignments or assurances and to take and do, in the name and on behalf of
MediaOne, any other actions and things to vest, perfect or confirm of record in
the Surviving Corporation any and all right, title and interest in, to and under
any of the rights, properties or assets of MediaOne acquired or to be acquired
by the Surviving Corporation as a result of, or in connection with, the Merger.

      SECTION 8.05. Access to Information. From the date hereof until the
Effective Time or earlier termination of this Agreement and subject to
applicable law and the Confidentiality Agreement, each of MediaOne and Comcast
shall (i) give to the other party and the other party's counsel, financial
advisors, auditors and other authorized representatives reasonable access during
normal business hours to the offices, properties, books and records of such
party and its Subsidiaries (and, in the case of MediaOne, to the offices,
properties, books and records of TWE and the TWE Subsidiaries to the extent it
is reasonably able to provide such access), (ii) furnish to the other party and
the other party's counsel, financial advisors, auditors and other authorized
representatives such financial and operating data and other information as such
Persons may reasonably request and (iii) instruct its employees, counsel,
financial advisors, auditors and other authorized representatives to cooperate
with the other party in such other party's



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<PAGE>
investigation. Any investigation pursuant to this Section 8.05 shall be
conducted in such manner as not to interfere unreasonably with the conduct of
the business of the other party. No information or knowledge obtained in any
investigation pursuant to this Section 8.05 shall affect or be deemed to modify
any representation or warranty made by any party hereunder. Each party will hold
such information which is non-public in confidence in accordance with the
provisions of the Confidentiality Agreement.

      SECTION 8.06.  Notices of Certain Events.  Each of MediaOne and
Comcast shall promptly notify the other of:

     (a) any notice or other communication from any Person alleging that the
      consent of such Person is or may be required in connection with the
      transactions contemplated by this Agreement;

     (b) any notice or other communication from any Governmental Authority in
      connection with the transactions contemplated by this Agreement;

     (c) the occurrence, or non-occurrence, of any event the occurrence, or
      non-occurrence, of which would be reasonably expected to cause any
      representation or warranty contained herein to be untrue or inaccurate in
      any material respect at any time during the period commencing on the date
      hereof and ending at the Effective Time; and

     (d) any failure of such party to comply with or satisfy any covenant,
      condition or agreement to be complied with or satisfied by it hereunder;

provided, however, that the delivery of any notice pursuant to this Section 8.06
shall not limit or otherwise affect the remedies available hereunder to the
party receiving such notice.

      SECTION 8.07. Tax-free Reorganization. (a) Prior to the Effective Time,
each party shall use its best efforts to cause the Merger to qualify as a
reorganization within the meaning of the provisions of Section 368(a) of the
Code ("368 REORGANIZATION"), and will not take any action reasonably likely to
cause the Merger not to so qualify. Comcast shall not take, or cause MediaOne to
take, any action after the Effective Time reasonably likely to cause the Merger
not to qualify as a 368 Reorganization.

     (b) Each party shall use its best efforts to obtain the opinions referred
to in Sections 9.02(b), 9.02(c), 9.03(b), and 9.03(c).


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<PAGE>
      SECTION 8.08. Affiliates. (a) Within 30 days following the date of this
Agreement, MediaOne shall deliver to Comcast a letter identifying all known
Persons who may be deemed affiliates of MediaOne under Rule 145 of the 1933 Act
(a "MEDIAONE RULE 145 AFFILIATE"). MediaOne shall use its best efforts to obtain
a written agreement from each MediaOne Rule 145 Affiliate as soon as practicable
and, in any event, at least 30 days prior to the Effective Time, substantially
in the form of Exhibit B hereto.

      SECTION 8.09. TWE Termination Notice. At any time after the date upon
which the MediaOne Stockholders' Approval shall have been obtained, either
MediaOne or Comcast may elect by written notice (a "TERMINATION NOTICE
ELECTION") to the other to have MediaOne give a Termination Notice (as defined
in Section 5.5(f) of the TWE Partnership Agreement). In addition, MediaOne may
exercise the Termination Notice Election at any time after the 90th day after
the date hereof. If either party exercises the Termination Notice Election, then
within five days of the date of such election, MediaOne shall give the
Termination Notice in accordance with the TWE Agreements.

      SECTION 8.10. Assumption of Certain Obligations. At the Effective Time,
the Surviving Corporation shall assume all of MediaOne's rights and obligations
under all of the agreements to which MediaOne is a party as of the Effective
Time, including without limitation, the Separation Agreement between MediaOne
and U S WEST dated as of June 5, 1998, the Employee Matters Agreement between
MediaOne and U S WEST dated as of June 5, 1998, and the Tax Sharing Agreement
between MediaOne and US WEST dated as of June 5, 1998 (collectively, the "U S
WEST AGREEMENTS") and shall execute such instruments of assumption as may be
reasonably required under the terms of the U S WEST Agreements and such other
agreements.



                                    ARTICLE 9
                            CONDITIONS TO THE MERGER

      SECTION 9.01.  Conditions to the Obligations of Each Party.  The
obligations of MediaOne and Comcast to consummate the Merger are subject to
the satisfaction of the following conditions:

     (a) each of the MediaOne Stockholders' Approval and the Comcast
      Stockholders' Approval shall have been obtained;



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<PAGE>
     (b) any applicable waiting period under the HSR Act relating to the Merger
      shall have expired or been terminated;

     (c) no provision of any applicable law or regulation and no judgment,
      injunction, order or decree shall prohibit the consummation of the Merger;

     (d) the Registration Statement shall have been declared effective and no
      stop order suspending the effectiveness of the Registration Statement
      shall be in effect and no proceedings for such purpose shall be pending
      before or threatened by the SEC;

     (e) the shares of Comcast Common Stock to be issued in the Merger shall
      have been approved for quotation on Nasdaq, subject to official notice of
      issuance;

     (f) if a Termination Notice has been delivered, one year shall have elapsed
      from the date upon which MediaOne delivers a Termination Notice to TW;

     (g) all License Consents, Social Contract Consents, Franchise Consents and
      other consents and waivers, including waivers of all Purchase Rights,
      shall have been obtained, be in effect and be subject to no limitations,
      conditions, restrictions or obligations, except for such consents the
      failure to obtain would not, and such limitations, conditions,
      restrictions or obligation as would not, individually or in the aggregate,
      be reasonably expected to have MediaOne Material Adverse Effect; and

     (h) no court, arbitrator or Governmental Authority shall have issued any
      order, and there shall not be any statute, rule or regulation restraining
      or prohibiting the effective operation of the business of Comcast and the
      Comcast Subsidiaries or MediaOne and the MediaOne Subsidiaries after the
      Effective Time that would be reasonably expected to have a MediaOne
      Material Adverse Effect or a Comcast Material Adverse Effect.

      SECTION 9.02. Conditions to the Obligations of Comcast. The obligations of
Comcast to consummate the Merger are subject to the satisfaction of the
following further conditions:

     (a) (i) MediaOne shall have performed in all material respects all of its
      obligations hereunder required to be performed by it at or prior to the
      Effective Time, (ii) the representations and warranties of MediaOne


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<PAGE>
      contained in this Agreement and in any certificate or other writing
      delivered by MediaOne pursuant hereto, disregarding all qualifications and
      exceptions contained therein relating to materiality or a MediaOne
      Material Adverse Effect or any similar standard or qualification, shall be
      true and correct at and as of the Effective Time, as if made at and as of
      such time (other than representations or warranties that address matters
      only as of a certain date which shall be true and correct as of such
      date), with only such exceptions as, individually or in the aggregate,
      have not had and would not be reasonably expected to have MediaOne
      Material Adverse Effect, and (iii) Comcast shall have received a
      certificate signed by an executive officer of MediaOne to the foregoing
      effect;

     (b) Comcast shall have received an opinion of Davis Polk & Wardwell in form
      and substance reasonably satisfactory to Comcast, on the basis of certain
      facts, representations and assumptions set forth in such opinion, dated
      the Effective Time, to the effect that the Merger will be treated for
      federal income tax purposes as a 368 Reorganization and that each of
      Comcast and MediaOne will be a party to the reorganization within the
      meaning of Section 368(b) of the Code. In rendering such opinion, such
      counsel shall be entitled to rely upon certain documentation including
      representations of officers of MediaOne and Comcast; and

     (c) Comcast shall have received an opinion of Davis Polk & Wardwell dated
      the Effective Time to the effect that the Merger pursuant to this
      Agreement should not cause the spinoff of U S WEST on June 12, 1998 (the
      "SPINOFF") to fail to be qualified as a tax-free transaction under Section
      355(a) and (c) of the Code. In rendering such opinion, Davis Polk &
      Wardwell shall be entitled to rely upon certain documentation, including
      representations of officers of MediaOne and Comcast.

      SECTION 9.03. Conditions to the Obligations of MediaOne. The obligations
of MediaOne to consummate the Merger are subject to the satisfaction of the
following further conditions:

     (a) (i) Comcast shall have performed in all material respects all of its
      obligations hereunder required to be performed by it at or prior to the
      Effective Time, (ii) the representations and warranties of Comcast
      contained in this Agreement and in any certificate or other writing
      delivered by Comcast pursuant hereto disregarding all qualifications and
      exceptions contained therein relating to materiality or Comcast Material
      Adverse Effect or any similar standard or qualification shall be true at
      and as of the Effective Time as if made at and as of such time (other than
      representations and warranties that address matters only as of a certain


                                65
<PAGE>
      date, which shall be true as of such date), with only such exceptions as,
      individually or in the aggregate, have not had and would not be reasonably
      expected to have a Comcast Material Adverse Effect and (iii) MediaOne
      shall have received a certificate signed by an executive officer of
      Comcast to the foregoing effect;

     (b) MediaOne shall have received an opinion of Weil, Gotshal & Manges LLP
      in form and substance reasonably satisfactory to MediaOne, on the basis of
      certain facts, representations and assumptions set forth in such opinion,
      dated the Effective Time, to the effect that the Merger will be treated
      for federal income tax purposes as a 368 Reorganization and that each of
      Comcast and MediaOne will be a party to the reorganization within the
      meaning of Section 368(b) of the Code. In rendering such opinion, such
      counsel shall be entitled to rely upon certain documentation including
      representations of officers of MediaOne and Comcast; and

     (c) MediaOne shall have received an opinion of Weil, Gotshal & Manges LLP
      dated the Effective Time to the effect that the Merger pursuant to this
      Agreement should not cause the Spinoff to fail to be qualified as a
      tax-free transaction under Section 355(a) and (c) of the Code. In
      rendering such opinion Weil, Gotshal & Manges LLP shall be entitled to
      rely upon certain documentation, including representations of officers of
      MediaOne and Comcast.



                                   ARTICLE 10
                                   TERMINATION

      SECTION 10.01.  Termination.  This Agreement may be terminated and the
Merger may be abandoned at any time prior to the Effective Time
(notwithstanding any approval of this Agreement by the stockholders of
MediaOne):

     (a)   by mutual written agreement of MediaOne and Comcast;

     (b) by either MediaOne or Comcast, if:

              (i) the Merger has not been consummated on or before March 31,
            2000 (the "END DATE"); provided that if (A) the Effective Time has
            not occurred by March 31, 2000 by reason of the non-satisfaction of
            any of the conditions set forth in Sections


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<PAGE>
            9.01(b), 9.01(c), 9.01(f), 9.01(g), and 9.01(h) and (B) all other
            conditions in Article 9 have theretofore been satisfied or waived or
            are then capable of being promptly satisfied, the End Date will be
            December 31, 2000; and provided further that the right to terminate
            this Agreement pursuant to this Section 10.01(b)(i) shall not be
            available to any party whose breach of any provision of this
            Agreement results in the failure of the Merger to be consummated by
            the End Date;

             (ii) (A) there shall be any law or regulation that makes
            consummation of the Merger illegal or otherwise prohibited or (B)
            any judgment, injunction, order or decree of any court or other
            Governmental Authority having competent jurisdiction enjoining
            MediaOne and Comcast from consummating the Merger is entered and
            such judgment, injunction, judgment or order shall have become final
            and non-appealable;

            (iii) MediaOne Stockholders' Approval shall not have been obtained
            at the MediaOne Stockholders' Meeting (or any adjournment or
            postponement thereof); or

             (iv) Comcast Stockholders' Approval shall not have been obtained at
            the Comcast Stockholders' Meeting (or any adjournment or
            postponement thereof);

     (c)   by Comcast if:

              (i) the Board of Directors of MediaOne shall have failed to
            recommend or withdrawn, or modified in a manner adverse to Comcast,
            its approval or recommendation of this Agreement, or shall have
            failed to call the MediaOne Stockholders' Meeting in accordance with
            Section 6.02(a) (or the Board of Directors of MediaOne resolves to
            do any of the foregoing);

             (ii) MediaOne shall have willfully and materially breached any of
            its obligations under Sections 6.02(b) or 6.03; or

            (iii) a breach of any representation, warranty, covenant or
            agreement on the part of MediaOne set forth in this Agreement shall
            have occurred that would cause the condition set forth in Section
            9.02(a) not to be satisfied, and such condition shall be incapable
            of being satisfied by the End Date; or



                                67
<PAGE>
     (d)   by MediaOne, if:

              (i) Comcast shall have failed to call the Comcast Stockholders'
            Meeting in accordance with Section 7.02 or Comcast Stockholder shall
            have materially and willfully breached the Voting Agreement;

             (ii) a breach of any representation, warranty, covenant or
            agreement on the part of Comcast set forth in this Agreement shall
            have occurred that would cause the condition set forth in Section
            9.03(a) not to be satisfied, and such condition shall be incapable
            of being satisfied by the End Date; or

            (iii) (A) the Board of Directors of MediaOne authorizes MediaOne,
            subject to complying with the terms of this Agreement, to enter into
            a binding written agreement concerning a transaction that
            constitutes a Superior Proposal and MediaOne notifies Comcast in
            writing that it intends to enter into such an agreement, attaching
            the most current version of such agreement to such notice (which
            version shall be updated on a current basis); (B) Comcast does not
            make, within five days (or, in the case of any notification with
            respect to a given Third Party, other than the initial notification,
            three days) of receipt of MediaOne's written notification of its
            intention to enter into a binding agreement for a Superior Proposal,
            an offer that the Board of Directors of MediaOne determines, in good
            faith after consultation with its financial advisors, is at least as
            favorable to the stockholders of MediaOne as the Superior Proposal;
            (C) MediaOne prior to such termination pursuant to this clause (iii)
            pays to Comcast in immediately available funds the fees required to
            be paid pursuant to Section 10.03(c); (D) such termination takes
            place no later than the last day of the Initial Period and (E)
            MediaOne shall have complied with Section 6.03. MediaOne agrees to
            notify Comcast promptly if its intention to enter into a written
            agreement referred to in its notification shall change at any time
            after giving such notification.

The party desiring to terminate this Agreement pursuant to this Section 10.01
(other than pursuant to Section 10.01(a)) shall give notice of such termination
to the other party.

      SECTION 10.02.  Effect of Termination.  If this Agreement is terminated
pursuant to Section 10.01, this Agreement shall become void and of no effect


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without liability of any party (or any stockholder, director, officer, employee,
agent, consultant or representative of such party) to the other parties hereto,
except that (a) the agreements contained in this Section 10.02, in Section 10.03
and in the Confidentiality Agreement shall survive the termination hereof and
(b) no such termination shall relieve any party of any liability or damages
resulting from any willful breach by such party of this Agreement.

      SECTION 10.03. Fees and Expenses. (a) Except as otherwise provided in this
Section 10.03, all costs and expenses incurred in connection with this Agreement
shall be paid by the party incurring such cost or expense whether or not the
Merger is consummated; provided that MediaOne and Comcast shall share equally
all fees and expenses, other than attorneys' and accounting fees and expenses,
incurred in relation to the printing and filing of the Registration Statement
and the Proxy Statement.

     (b) If this Agreement is terminated pursuant to Section 10.01(c)(i) or
Section 10.01(c)(ii), MediaOne shall pay to Comcast a termination fee of
$1,500,000,000 in cash (the "TERMINATION FEE").

     (c) If this Agreement is terminated pursuant to Section 10.01(d)(iii),
MediaOne shall pay to Comcast the Termination Fee.

     (d) If this Agreement is terminated pursuant to Section 10.01(d)(i),
Comcast shall pay to MediaOne the Termination Fee.

     (e) If (A) this Agreement is terminated pursuant to Section 10.01(b)(iii),
(B) prior to the MediaOne Stockholders' Meeting, an Acquisition Proposal is made
by any Person and not withdrawn prior to such meeting and (C) within one year of
the MediaOne Stockholders' Meeting, either (1) MediaOne or any MediaOne
Subsidiary enters into an agreement with any Person with respect to an
Acquisition Proposal which provides for (x) transfer or issuance of securities
representing more than 50% of the equity or voting interests in MediaOne, (y) a
merger, consolidation, recapitalization or another transaction resulting in the
issuance of cash or securities of any Person (other than a reincorporation or a
holding company merger that results in the MediaOne stockholders owning all of
the equity interests in the surviving corporation) to MediaOne stockholders in
exchange for more than 50% of the equity or voting interests in MediaOne, or (z)
transfer of assets, securities or ownership interests representing more than 50%
of the consolidated assets or earning power of the MediaOne Group, or (2) any
Person commences a tender offer that results in the acquisition by the Person
making the tender offer of a majority of the MediaOne Common Stock, then
MediaOne shall pay to Comcast the Termination Fee.



                                69
<PAGE>
     (f) If this Agreement is terminated pursuant to Section 10.01(b)(iv),
Comcast shall pay to MediaOne the Termination Fee.

     (g) Any payment of the Termination Fee pursuant to this Section 10.03 shall
be made within one Business Day after termination of this Agreement except that
(i) any payment of the Termination Fee pursuant to Section 10.03(c) shall be
paid immediately prior to the termination of this Agreement and (ii) any payment
of the Termination Fee pursuant to Section 10.03(e) shall be paid within one
Business Day after it becomes payable. Any payment of the Termination Fee shall
be made by wire transfer of immediately available funds. If one party fails to
pay to the other promptly any fee or expense due hereunder (including the
Termination Fee), the defaulting party shall pay the costs and expenses
(including legal fees and expenses) in connection with any action, including the
prosecution of any lawsuit or other legal action, taken to collect payment,
together with interest on the amount of any unpaid fee at the publicly announced
prime rate of The Bank of New York in New York City from the date such fee was
required to be paid to the date it is paid.



                                   ARTICLE 11
                                  MISCELLANEOUS

      SECTION 11.01. Notices. All notices, requests and other communications to
any party hereunder shall be in writing (including facsimile transmission) and
shall be given,

      if to Comcast, to:

      Comcast Corporation
      1500 Market Street
      Philadelphia, Pennsylvania 19102
      Attention: General Counsel
      Fax: (215) 981-7794

      with a copy to:

      Davis Polk & Wardwell
      450 Lexington Avenue
      New York, New York 10017
      Attention: Dennis S. Hersch
      Fax: (212) 450-4800



                                70
<PAGE>
      if to MediaOne, to:

      MediaOne Group, Inc.
      188 Inverness Drive West
      Englewood, Colorado 80112
      Attention: Frank M. Eichler
      Fax: (303) 858-5834

      with a copy to:

      Weil, Gotshal & Manges LLP
      767 Fifth Avenue
      New York, New York 10153
      Attention: Stephen M. Besen
      Fax: (212) 310-8007

or such other address or facsimile number as such party may hereafter specify
for the purpose by notice to the other parties hereto. All such notices,
requests and other communications shall be deemed received on the date of
receipt by the recipient thereof if received prior to 5 p.m. on a Business Day,
in the place of receipt. Otherwise, any such notice, request or communication
shall be deemed not to have been received until the next succeeding Business Day
in the place of receipt.

      SECTION 11.02. Survival of Representations and Warranties. The
representations and warranties contained herein and in any certificate or other
writing delivered pursuant hereto shall not survive the Effective Time or the
termination of this Agreement, except as provided under Section 10.02.

      SECTION 11.03. Amendments; No Waivers. (a) Subject to applicable law, any
provision of this Agreement may be amended or waived prior to the Effective Time
if, but only if, such amendment or waiver is in writing and is signed, in the
case of an amendment, by each party to this Agreement or, in the case of a
waiver, by each party against whom the waiver is to be effective; provided that,
after the adoption of this Agreement by the stockholders of MediaOne, no such
amendment or waiver shall be made or given that requires the approval of the
stockholders of MediaOne unless the required approval is obtained.

     (b) No failure or delay by any 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.


                                71
<PAGE>
      SECTION 11.04. Successors and Assigns. The provisions of this Agreement
shall be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns; provided that no party may assign, delegate
or otherwise transfer any of its rights or obligations under this Agreement
without the consent of each other party hereto.

      SECTION 11.05. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware, without regard
to the conflicts of law rules of such State except that the effects of the
Merger under Pennsylvania Law shall be governed by Pennsylvania Law.

      SECTION 11.06. Jurisdiction. Any suit, action or proceeding seeking to
enforce any provision of, or based on any matter arising out of or in connection
with, this Agreement or the transactions contemplated hereby shall be brought in
any federal court located in the State of Delaware or any Delaware state court,
and each of the parties hereby consents to the exclusive jurisdiction of such
courts (and of the appropriate appellate courts therefrom) in any such suit,
action or proceeding and irrevocably waives, to the fullest extent permitted by
law, any objection that it may now or hereafter have to the laying of the venue
of any such suit, action or proceeding in any such court or that any such suit,
action or proceeding brought in any such court has been brought in an
inconvenient form. Process in any such suit, action or proceeding may be served
on any party anywhere in the world, whether within or without the jurisdiction
of any such court. Without limiting the foregoing, each party agrees that
service of process on such party as provided in Section 11.01 shall be deemed
effective service of process on such party.

      SECTION 11.07. WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO HEREBY
IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING
ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED
HEREBY.

      SECTION 11.08. 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
counterparts hereof signed by all of the other parties hereto. No provision of
this Agreement is intended to confer any rights, benefits, remedies, obligations
or liabilities hereunder upon any Person other than the parties hereto and their
respective successors and assigns except as provided in Sections 7.03, 7.05 and
7.06.


                                72
<PAGE>
      SECTION 11.09. Entire Agreement. This Agreement, together with the Voting
Agreement and the Confidentiality Agreement, constitutes the entire agreement
between the parties with respect to the subject matter of this Agreement and
supersedes all prior agreements and understandings, both oral and written,
between the parties with respect to the subject matter of this Agreement.

      SECTION 11.10.  Captions.  The captions herein are included for
convenience of reference only and shall be ignored in the construction or
interpretation hereof.

      SECTION 11.11. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated
so long as the economic or legal substance of the transactions contemplated
hereby is not affected in any manner materially adverse to any party. Upon such
a determination, the parties shall negotiate in good faith to modify this
Agreement so as to effect the original intent of the parties as closely as
possible in an acceptable manner so that the transactions contemplated hereby be
consummated as originally contemplated to the fullest extent possible.

      SECTION 11.12. Specific Performance. The parties hereto agree that
irreparable damage would occur if any provision of this Agreement were not
performed in accordance with the terms hereof and that the parties shall be
entitled to an injunction or injunctions to prevent breaches of this Agreement
or to enforce specifically the performance of the terms and provisions hereof in
any federal court located in the State of Delaware or any Delaware state court,
in addition to any other remedy to which they are entitled at law or in equity.

      SECTION 11.13. Schedules. Each of MediaOne and Comcast has set forth
information in its respective Disclosure Schedule in a section thereof that
corresponds to the section of this Agreement to which it relates. A matter set
forth in one section of the Disclosure Schedules need not be set forth in any
other section of the Disclosure Schedule so long as its relevance to the latter
section of the Disclosure Schedule or section of the Agreement is apparent on
the face of the information disclosed in the Disclosure Schedule. The fact that
any item of information is disclosed in a Disclosure Schedule to this Agreement
shall not be construed to mean that such information is required to be disclosed
by this Agreement. Such information and the dollar thresholds set forth herein
shall not be used as a basis for interpreting the terms "material" or "Material
Adverse Effect" or other similar terms in this Agreement except as otherwise
expressly set forth in such Disclosure Schedules.


                                73
<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.



                              MEDIAONE GROUP, INC.

                              By: /s/ Charles M. Lillis
                                  ----------------------------------------
                                  Name: Charles M. Lillis
                                  Title: President, Chief Executive Officer
                                         and Chairman



                              COMCAST CORPORATION

                              By: /s/ Brian L. Roberts
                                  ----------------------------------------
                                  Name: Brian L. Roberts
                                  Title: President






                                74


                                                                   Exhibit 4.1


            AMENDMENT NO. 1 TO AMENDED AND RESTATED RIGHTS AGREEMENT

         AMENDMENT NO. 1 (this "Amendment"), dated as of March 22, 1999 to the
Amended and Restated Rights Agreement (the "Rights Agreement"), dated as of June
12, 1998, by and between MediaOne Group, Inc., a Delaware corporation (the
"Company"), and State Street Bank and Trust Company, as Rights Agent (the
"Rights Agent").

                               W I T N E S S E T H

         WHEREAS, concurrently with the execution hereof, the Company has
entered into an Agreement and Plan of Merger by and between the Company and
Comcast, a Pennsylvania corporation (the "Merger Agreement"); and

         WHEREAS, the Board of Directors of the Company has approved, authorized
and adopted the Merger Agreement and the transactions contemplated thereby and,
subject to certain conditions, is bound to recommend the stockholders of the
Company the approval and adoption of the Merger Agreement; and

         WHEREAS, the Board of Directors of the Company has determined that in
connection with the Merger Agreement and the transactions contemplated thereby,
it is desirable and in the best interests of the shareholders of the Company to
amend the Rights Agreement as set forth herein; and

         WHEREAS, pursuant to Section 27 of the Rights Agreement, the Company
and the Rights Agent desire to amend the Rights Agreement as set forth herein;

         NOW, THEREFORE, the Rights Agreement is amended as follows:

         SECTION 1. Proposed Merger. The following definition hereby replaces in
its entirety subsection (z) of Section 1 of the Rights Agreement:

                  (z) "15% Stockholder" shall mean any Person that, together
         with all Affiliates and Associates of such Person, hereafter acquires
         Beneficial Ownership of, in the aggregate, a number of Voting Shares of
         the Company equal to 1% or more of the Voting Shares then outstanding
         and thereupon or thereafter Beneficially Owns 15% or more of the Voting
         Shares of the Company then outstanding; PROVIDED, HOWEVER, that the
         term "15% Stockholder" shall not include: (i) the Company, any
         Subsidiary of the Company, any employee benefit plan of the Company or
         of a Subsidiary of the Company, or any Person holding Voting Shares for
         or pursuant to the terms of any such employee benefit plan; (ii) any
         Person if such Person would not otherwise be a 15% Stockholder but for
         a reduction in the number of outstanding Voting Shares resulting from a
         stock repurchase program or other similar plan of the Company or from a
         self-tender offer of the Company, which plan or tender offer commenced
         on or after the date hereof; PROVIDED , HOWEVER, that the term "15%
         Stockholder" shall include such Person from and after the first date



NY2:\377698\01\83FM01!.DOC\62634.0016
<PAGE>
         upon which (A) such Person, since the date of the commencement of such
         plan or tender offer, shall have acquired Beneficial Ownership of, in
         the aggregate, a number of Voting Shares of the Company equal to 1% or
         more of the Voting Shares of the Company then outstanding and (B) such
         Person, together with all Affiliates and Associates of such Person,
         shall Beneficially Own 15% or more of the Voting Shares of the Company
         then outstanding; or (iii) Comcast Corporation or any of its Affiliates
         or Associates who become the Beneficial Owner of 15% of the Voting
         Shares of the Company by reason of (A) the approval, execution,
         delivery and performance of the Merger Agreement by the parties
         thereto, (B) the approval of the Merger Agreement by the stockholders
         of the parties thereto or (C) the consummation of the transactions
         contemplated by the Merger Agreement; PROVIDED, HOWEVER, that in the
         event that Comcast or its Affiliates or Associates collectively become
         the Beneficial Owner of 15% or more of the Voting Shares then
         outstanding in any manner other than as contemplated in the Merger
         Agreement, the provisions of this Subsection (iii) (other than this
         proviso) shall terminate. In calculating the percentage of the
         outstanding Voting Shares that are Beneficially Owned by a Person for
         purposes of this subsection (z), Voting Shares that are Beneficially
         Owned by such Person shall be deemed outstanding, and Voting Shares
         that are not Beneficially Owned by such Person and that are subject to
         issuance upon the exercise or conversion of outstanding conversion
         rights, rights (other than Rights), warrants or options shall not be
         deemed outstanding. Any determination made by the Board of Directors of
         the Company as to whether any Person is or is not a 15% Stockholder
         shall be conclusive and binding upon all holders of Rights.

         SECTION 2. Effectiveness. This Amendment shall be deemed effective as
of the date first set forth above. Except as amended hereby, the Rights
Agreement shall remain in full force and effect and shall be otherwise
unaffected hereby.

         SECTION 3. Miscellaneous. This Amendment shall be deemed to be a
contract made under the laws of the State of Delaware and for all purposes shall
be governed by and construed in accordance with the laws of such state
applicable to contracts to be made and performed entirely within such state.
This Amendment may be executed in any number of counterparts, each of such
counterparts shall for all purposes be deemed to be an original, and all such
counterparts shall together constitute one and the same instrument. If any term,
provision, covenant or restriction of this Amendment is held by a court of
competent jurisdiction or other authority to be invalid, illegal, or
unenforceable, the remainder of the terms, provisions, covenants and
restrictions of this Amendment shall remain in full force and effect and shall
in no way be affected, impaired or invalidated.


                                       2
<PAGE>
                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed as of the date first above written.



                                           MEDIAONE GROUP, INC.

                                           By: 
                                               --------------------------------
                                               Name: Stephen E. Brilz
                                               Title: Assistant Secretary



                                           STATE STREET BANK AND TRUST COMPANY

                                           By: 
                                               --------------------------------
                                               Name:
                                               Title:










                                       3



                                                                  Exhibit 99.1


COMCAST CORPORATION                                           MEDIAONE GROUP
[LOGO]                                                        [LOGO]


NEWS RELEASE
- --------------------------------------------------------------------------------

FOR IMMEDIATE RELEASE

                COMCAST AND MEDIAONE ANNOUNCE $60 BILLION MERGER

              MEDIAONE SHAREHOLDERS TO RECEIVE 1.1 COMCAST CLASS A
                    SPECIAL COMMON SHARES PER MEDIAONE SHARE

                Creates Leading Broadband Communications Company

                     --------------------------------------

         (Philadelphia, PA and Englewood, CO) March 22, 1999 -- Comcast
Corporation (NASDAQ: CMCSK, CMCSA) and MediaOne Group, Inc. (NYSE:UMG) announced
today that the two companies have entered into a merger agreement that combines
the third and fourth largest domestic cable providers to create the world's
leading broadband communications provider. The combined Comcast/MediaOne will,
on a pro forma basis, serve 11 million cable customers with systems that pass
over 18 million homes domestically. On a pro forma basis, the combined company
would have generated over $8 billion in 1998 revenues, EBITDA of approximately
$2.4 billion and will be well positioned to take advantage of the growing and
dynamic broadband communications industry.

         The merger agreement calls for each MediaOne shareholder to receive 1.1
shares of Comcast Class A Special Common Stock (CMCSK) for each MediaOne share
it owns, or $80.16 per share based on Comcast's closing stock price of $72.875
on Friday, March 19th. The stock-based consideration represents a premium of
approximately 32% to MediaOne's closing price of $60.75. Upon completion of the
merger, MediaOne shareholders will own approximately 64% of the equity of the
combined company. The merger will be accounted for as a purchase by Comcast and
will be tax-free to MediaOne shareholders. The boards of directors of both
companies have unanimously approved the transaction.



                                     -more-



NY2:\380123\01\85@Z01!.DOC\62634.0016
<PAGE>
         Mr. Brian L. Roberts, President of Comcast, said, "This is a
breathtaking moment in the history of Comcast. The combination of MediaOne and
Comcast will form a company with the most attractive assets in the industry, a
powerful balance sheet and an unmatched management team. The new company will
have the size and scope to lead the evolving broadband environment. Our cable
properties are geographically complementary and should provide the opportunity
for meaningful revenue enhancement and operating synergies promptly after
closing."

         Mr. Charles M. Lillis, President, Chief Executive Officer and Chairman
of MediaOne, commented, "This transaction creates a company with a unique
combination of high growth domestic and international broadband, programming and
telephony businesses. Together, we will be optimally positioned to develop and
provide nationally branded broadband services across our principal business
lines of video, voice and data. Customers will benefit from a broader and
bundled service offering, while shareholders and employees will have the
opportunity to participate in the growth of the combined entity."

The combined company will:

o    have a capitalization of almost $97 billion (market value of equity plus
     debt and preferred as of March 19, 1999)

o    have the best clustered and one of the largest broadband networks in the
     U.S. with 8 clusters, each with greater than 500,000 subscribers

o    pass over 18 percent of U.S. households with its existing cable
     infrastructure

o    serve over 11 million domestic cable customers

o    hold valuable global telecommunications, programming and Internet interests

o    be strong financially, with little net debt


         The management team for the new company will be drawn from the
leadership teams of both MediaOne and Comcast. Ralph J. Roberts will remain
Chairman of the combined company and Brian Roberts will remain President. Chuck
Lillis will serve as a Vice Chairman of Comcast and join the Comcast Board of
Directors along with three additional MediaOne designees, bringing the total
number of directors to 14.

         The merger agreement is subject to the approvals of MediaOne and
Comcast shareholders as well as approvals from federal and local regulatory
authorities. The companies anticipate that the merger will close by
approximately year-end.

         While the merger agreement prohibits MediaOne from soliciting competing
acquisition proposals, it has 45 days to accept a superior proposal, subject to
payment of a fee of $1.5 billion to Comcast.


                                     -more-
<PAGE>

         Salomon Smith Barney acted as financial advisor and provided a fairness
opinion to Comcast and Lehman Brothers Inc. acted as financial advisor and
provided a fairness opinion to MediaOne. Comcast is being represented by David
Polk & Wardwell and MediaOne is being represented by Weil Gotshal & Manges and
Cadwalader Wickersham & Taft.

         Comcast Corporation (www.comcast.com) is principally engaged in the
development, management and operation of broadband cable networks and in the
provision of content through principal ownership of QVC, Comcast-Spectacor and
Comcast SportsNet, a controlling interest in E! Entertainment Television and
through other programming investments. Comcast's Class A Special and Class A
Common Stock are traded on The Nasdaq Stock Market under the symbols CMCSK and
CMCSA, respectively.

         MediaOne Group (www.mediaonegroup.com) is one of the world's largest
broadband communications companies, bringing the power of broadband and the
Internet to subscribers in the United States, Europe and Asia. The company also
has interests in some of the fastest-growing wireless communications businesses
outside the U.S. For 1998, the businesses that comprise MediaOne Group produced
$7.1 billion in proportionate revenue.

         This press release contains forward looking statements made pursuant to
the "safe harbor" provisions of the Private Securities Litigation Reform Act of
1995. You are cautioned that such forward looking statements involve risks and
uncertainties which could significantly affect expected results in the future
from those expressed in any such forward looking statements made by, or on
behalf of the Company. Certain factors that could cause actual results to differ
materially include, without limitation, the effects of legislative and
regulatory changes; the potential for increased competition; technological
changes; the need to generate substantial growth in the subscriber base by
successfully launching, marketing and providing services in identified markets;
pricing pressures which could affect demand for the Company's services; the
Company's ability to expand its distribution; changes in labor, programming,
equipment and capital costs; availability of debt and equity financing; the
Company's continued ability to create or acquire programming and products that
customers will find attractive; future acquisitions, strategic partnerships and
divestitures; general business and economic conditions; and other risks detailed
from time to time in the Company's periodic reports filed with the Securities
and Exchange Commission.

Contacts:
- ---------

Comcast:                               MediaOne:
John Alchin                            Jane Okun
Senior Vice President and Treasurer    Executive Director, Investor Relations
215-981-7503                           303-858-3696


Marlene Dooner                         Steve Lang
Senior Director of Investor Relations  Executive Director, Financial & Corporate
215-981-7392                           Communications
                                       303-858-3406

Press:
Abernathy MacGregor Frank
Ann Hance/Adam Miller
212-371-5999





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