SCHEDULE 14A INFORMATION

                  Proxy Statement Pursuant to Section 14(a) of
                      the Securities Exchange Act of 1934

Filed by the Registrant |_|
Filed by a Party other than the Registrant |X|

Check the appropriate box:
|_| Preliminary Proxy Statement              |_|  Confidential, For Use of
                                                  the Commission Only (as
|_| Definitive Proxy Statement                    permitted by Rule 14a-6(e)(2))
|_| Definitive Additional Materials
|X| Soliciting Material Under Rule 14a-12


                                   AT&T Corp.
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                (Name of Registrant as Specified In Its Charter)

                              Comcast Corporation
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    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):
     |X| No fee required.
     |_| Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and
         0-11.
     (1) Title of each class of securities to which transaction applies:

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     (2) Aggregate number of securities to which transaction applies:

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     (3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing
fee is calculated and state how it was determined):

- -------------------------------------------------------------------------------
     (4) Proposed maximum aggregate value of transaction:

- -------------------------------------------------------------------------------
     (5) Total fee paid:

- -------------------------------------------------------------------------------
     |_| Fee paid previously with preliminary materials.

- -------------------------------------------------------------------------------
     |_| Check box if any part of the fee is offset as provided by Exchange Act
Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid
previously. Identify the previous filing by registration statement number, or
the form or schedule and the date of its filing.

     (1) Amount previously paid:

- -------------------------------------------------------------------------------
     (2) Form, Schedule or Registration Statement No.:

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     (3) Filing Party:

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     (4) Date Filed:

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     The following transaction fact sheet was posted on Comcast's website:


                                   Fact Sheet
                  Proposed Comcast/AT&T Broadband Combination

PROPOSAL OVERVIEW

o    Comcast has proposed a business combination with AT&T Broadband that would
     create the world's leader in broadband communication. The combined company
     would:
     - Generate $14.9 billion in cable revenue
     - Serve approximately 22 million subscribers in 41 states
     - Offer an expanded platform from which to launch new products and build
       new programming assets

PROPOSAL TERMS

o    Values AT&T Broadband's core business, composed of its 13.5 million cable
     subscribers and its joint venture interests, at $58 billion
     - 1.0525 billion new Comcast shares with a value of $44.5 billion
     - $13.5 billion in assumed debt
o    Comcast is also prepared to acquire AT&T's interests in Time Warner
     Entertainment, Cablevision and Rainbow Media by assuming more debt and
     issuing more equity
o    AT&T shareholders would own a majority of the economic and voting interests
     in the combined company
o    The combination would be tax-free to AT&T and all shareholders
o    AT&T shareholders would receive Comcast shares representing 75%
     of AT&T's total current equity value while retaining AT&T's historical
     communications businesses

PROPOSAL BENEFITS

o    Expects to deliver annual combination benefits amounting to at least $1.25
     billion, which could increase to $2.6 to $2.8 billion if combined margins
     reach Comcast's existing levels
o    Delivers a very substantial premium over published reports of the
     estimated value of AT&T's broadband business
o    Eliminates risks, uncertainties and discounts inherent in creating a
     broadband tracking stock
o    Dramatically accelerates AT&T's plan to separate its company


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   Note: The following notice is included to meet certain legal requirements:

                           FORWARD-LOOKING STATEMENTS

     This filing contains forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995. In some cases, you can
identify those so-called "forward-looking statements" by words such as "may,"
"will," "should," "expects," "plans," "anticipates," "believes," "estimates,"
"predicts," "potential," or "continue," or the negative of those words and
other comparable words. Comcast Corporation ("Comcast") wishes to take
advantage of the "safe harbor" provided for by the Private Securities
Litigation Reform Act of 1995 and you are cautioned that actual events or
results may differ materially from the expectations expressed in such
forward-looking statements as a result of various factors, including risks and
uncertainties, many of which are beyond the control of Comcast. Factors that
could cause actual results to differ materially include, but are not limited
to: (1) the businesses of Comcast and AT&T Broadband may not be integrated
successfully or such integration may be more difficult, time-consuming or
costly than expected; (2) expected combination benefits from the transaction
may not be fully realized or realized within the expected time frame; (3)
revenues following the transaction may be lower than expected; (4) operating
costs, customer loss and business disruption, including, without limitation,
difficulties in maintaining relationships with employees, customers, clients or
suppliers, may be greater than expected following the transaction; (5) the
regulatory approvals required for the transaction may not be obtained on the
proposed terms or on the anticipated schedule; (6) the effects of legislative
and regulatory changes; (7) the potential for increased competition; (8)
technological changes; (9) the need to generate substantial growth in the
subscriber base by successfully launching, marketing and providing services in
identified markets; (10) pricing pressures which could affect demand for
Comcast's services; (11) Comcast's ability to expand its distribution; (12)
changes in labor, programming, equipment and capital costs; (13) Comcast's
continued ability to create or acquire programming and products that customers
will find attractive; (14) future acquisitions, strategic partnerships and
divestitures; (15) general business and economic conditions; and (16) other
risks described from time to time in Comcast's periodic reports filed with the
Securities and Exchange Commission (the "Commission").


                             ADDITIONAL INFORMATION

     Subject to future developments, Comcast may file with the Commission (i) a
preliminary proxy statement for solicitation of proxies from the shareholders
of AT&T Corp. ("AT&T") in connection with AT&T's special meeting which is
scheduled to take place in September 2001 and (ii) a registration statement to
register the Comcast shares to be issued in the proposed transaction. Investors
and security holders are urged to read the proxy statement and registration
statement (when and if available) and any other relevant documents filed with
the Commission, as well as any amendments or supplements to those documents,
because they will contain important information. Investors and security holders
may obtain a free copy of the proxy statement and the registration statement
(when and if available) and other relevant documents at the Commission's
Internet web site at www.sec.gov. The proxy statement and registration
statement (when and if available) and such other documents may also be obtained
free of charge from Comcast by directing such request to: Comcast Corporation,
1500 Market Street, Philadelphia, Pennsylvania 19102-2148, Attention: General
Counsel.

     Comcast, its directors and certain other Comcast employees and advisors
may be deemed to be "participants" in Comcast's solicitation of proxies from
AT&T's shareholders. A detailed list of the names, affiliations and interests
of the participants in the solicitation is contained in a filing made by
Comcast with the Commission pursuant to Rule 14a-12 on July 9, 2001.


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