October 30, 1997



Mr. John C. Petrillo
295 No. Maple Ave., Rm 5204A2
Basking Ridge, NJ  07920

Dear John:

         The purpose of this letter  agreement  (hereinafter  "Agreement") is to
detail and document a special individual  non-qualified  supplemental retirement
arrangement we have developed for you. Under this Agreement,  a deferred account
(hereinafter   "Deferred  Account")  will  be  established  in  your  name.  The
maintenance,  vesting, forfeiture and distribution of the Deferred Account shall
be in accordance with the following terms and conditions.

         On November 1, 1997  (hereinafter  the  "Effective  Date"),  AT&T Corp.
(hereafter  "the  Company")  shall credit the  Deferred  Account with an initial
balance of Eight Hundred and Seventy  Thousand Dollars  ($870,000).  The Company
shall  credit  interest to the Deferred  Account as of the end of each  calendar
quarter at a rate equal to one-quarter of the average 30 Year Treasury Bond Rate
in effect for the last previous quarter.

         The Deferred Account will be maintained as a bookkeeping account on the
records of the Company and you will have no present  ownership right or interest
in the Deferred Account,  nor in any assets of the Company with respect thereto.
The Deferred Account may not be assigned,  pledged or otherwise alienated by you
and any attempt to do so, or any garnishment, execution or levy of any kind with
respect to the Deferred Account, will not be recognized.  You shall not have any
right to receive any payment  with respect to the  Deferred  Account,  except as
expressly provided below.

         In the  event you  cease to be a  Company  employee  prior to the sixth
anniversary of the Effective Date:

               (a)    by  reason of  death or Long-Term  Disability (as  defined
                      below), all  amounts  credited  to  the  Deferred  Account
                      through the date of such termination, shall be paid to you
                      [or, upon your death to  your  beneficiary, as  designated
                      on  a  form  filed  with   Executive  Human  Resources, or
                      to  your estate  if no beneficiary  has  been  designated,
                      (hereinafter your Survivors)] within  the calendar quarter
                      immediately  following  the  quarter  which  includes  the
                      date of your  termination  of  Company  employment;

               (b)    by reason of Company-initiated  termination for other than
                      Cause (as  defined  below),  all amounts  credited  to the
                      Deferred  Account  through  the  sixth anniversary  of the
                      Effective Date shall be paid to you (or to your Survivors)
                      within  the  calendar  quarter  immediately following  the
                      quarter which includes such sixth anniversary;



               (c)    by  reason  of  your  election  to terminate  your Company
                      employment for Good Reason (as defined below), all amounts
                      credited  to  the  Deferred   Account  through  the  sixth
                      anniversary of the Effective Date shall be paid to you (or
                      to   your   Survivors)   within    the   calendar  quarter
                      immediately  following  the  quarter  which  includes such
                      sixth anniversary; and

               (d)    for any  reason other than death, "Long  Term Disability,"
                      Company-initiated termination for other than  "Cause,"  or
                      your  election  to  terminate  your  employment  for "Good
                      Reason," then all amounts  in the  Deferred  Account shall
                      be  canceled  and you shall not  receive any  distribution
                      with respect to  the Deferred  Account or have any further
                      interest in the Deferred Account.

         In the event you cease to be a Company  employee  on or after the sixth
anniversary  of the  Effective  Date for any reason  other than your death,  all
amounts  credited to the Deferred  Account will be paid to you in ____ (1 to 10)
_____ (initials)  approximately equal annual installments  commencing within the
first  calendar  quarter of the calendar  year  following the year in which your
termination  of  employment  occurs.  Unpaid  Deferred  Account  balances  after
termination  continue to be credited with  interest.  In the event of your death
prior to either  commencement  or completion of Deferred  Account  payment(s) to
you, the unpaid  balance of the Deferred  Account as of your death shall be paid
to  your  Survivors  in a lump  sum  within  the  calendar  quarter  immediately
following the quarter which includes the date of your death.

         For purposes of this Agreement:

    (a)  "Long Term  Disability"  shall mean termination of your employment with
         the    Company  with  eligibility  to  receive a  disability  allowance
         under  the  AT&T  Senior Management Long  Term Disability  and Survivor
         Protection Plan or a replacement plan;

    (b)  "Cause" shall mean:

         (i)      your breach of any of the terms of this Agreement;

         (ii)     your   conviction   (including   a  plea  of  guilty  or  nolo
                  contendere) of a crime involving theft,  fraud,  dishonesty or
                  moral turpitude;

         (iii)    gross omission or gross  dereliction of any statutory,  common
                  law or other  duty of  loyalty  to the  Company  or any of its
                  affiliates;

         (iv)     violation by you of the Company's Code of Conduct or
                  Non-Competition Guideline; or

         (v)      repeated  failure  to carry out the  duties  of your  position
                  despite specific instruction to do so.

    (c)  "Good Reason" shall mean the  occurrence  without your express  written
         consent of any of the following events:



         (i)      Your  demotion  to a  position  which  is not  of a  rank  and
                  responsibility  comparable  to members of the  current  Senior
                  Management  Team or  those of a  similar/replacing  governance
                  body;  provided,  however,  that the Company's decision not to
                  continue a Senior  Management  Team shall not be Good  Reason,
                  and   provided,   further,   that  (1)  changes  in  reporting
                  relationships shall not, alone,  constitute Good Reason and/or
                  (2) a reduction in your business  unit's budget or a reduction
                  in your  business  unit's head count,  by  themselves,  do not
                  constitute Good Reason; or

         (ii)     a  reduction in  your "Total Annual Compensation" (defined  as
                  the  sum  of  your  Annual  Base  Salary  Rate, Target  Annual
                  Incentive and "Target Annual Long Term  Incentive Grants") for
                  any calendar or fiscal year, as applicable, to  an amount that
                  is less than the Total Annual Compensation that existed in the
                  prior calendar or fiscal year, as applicable.  For purposes of
                  this paragraph (c)(ii) the dollar value  of the "Target Annual
                  Long  Term Incentive  Grants" shall exclude  the  value of any
                  special one-time  or periodic long-term  incentive grants, and
                  shall  be  determined  by  valuing  Performance  Shares, Stock
                  Units,  Restricted  Stock, Restricted   Stock  Units, etc., at
                  the   market  share  price  utilized  in   valuing  the annual
                  Senior Management compensation  structures  in  the  materials
                  presented to  the Compensation and Employee Benefits Committee
                  of  the Company's Board of  Directors when  authorizing   such
                  grants,  and   assuming  100% performance  achievement if such
                  grants include performance criteria. Stock   Options and Stock
                  Appreciation  Rights will be valued  by  the    Black  Scholes
                  methodology  (and  related   share  price) as utilized  in the
                  materials presented to such Compensation and Employee Benefits
                  Committee when authorizing such grants.

          It is understood and agreed that you will not talk about,  write about
or otherwise  publicize  the terms or  existence  of this  Agreement or any fact
concerning  its  execution  or  implementation.  You may,  however,  discuss its
contents  with your  spouse,  legal  and/or  financial  counselor.  IN ADDITION,
DEFERRED ACCOUNT AMOUNTS PROVIDED UNDER THIS AGREEMENT ARE SUBJECT TO FORFEITURE
(OR  REPAYMENT IF SUCH  AMOUNTS  ALREADY HAVE BEEN PAID) IF YOU VIOLATE THE AT&T
NON-COMPETITION  GUIDELINE IN EFFECT AT THE TIME OF THE VIOLATION  ANYTIME PRIOR
TO THE THIRD ANNIVERSARY OF YOUR TERMINATION OF COMPANY EMPLOYMENT. (THE CURRENT
GUIDELINE SUMMARY IS ATTACHED.)

         THIS  AGREEMENT  IS  NOT  AN  EMPLOYMENT  CONTRACT  AND  SHOULD  NOT BE
CONSTRUED OR INTERPRETED  AS CONTAINING  ANY GUARANTEE OF CONTINUED  EMPLOYMENT.
THE   EMPLOYMENT   RELATIONSHIP   WITH  THE   COMPANY   IS  BY  MUTUAL   CONSENT
("EMPLOYMENT-AT-WILL").  THIS MEANS THAT  EMPLOYEES  HAVE THE RIGHT TO TERMINATE
THEIR EMPLOYMENT AT ANY TIME AND FOR ANY REASON.  LIKEWISE, THE COMPANY RESERVES
THE RIGHT TO DISCONTINUE  YOUR  EMPLOYMENT WITH OR WITHOUT CAUSE AT ANY TIME AND
FOR ANY REASON.

         Payments  from the Deferred  Account are in addition to and not in lieu
of any qualified or non-qualified  pension,  savings,  or other retirement plan,
program  or  arrangement  covering  you,  nor are such  payments  in lieu of any
payments  or other  benefits  which may be provided to you under the AT&T Senior
Officer  Severance  Plan.  The Deferred  Account  payments  provided  under this
Agreement  are subject to payroll tax  withholding  and  reporting,  and amounts
credited to the Deferred  Account are not  included in the base for  calculating
benefits  under any  employee  or Senior  Management  benefit  plan,  program or
practice.


         Any  dispute,  controversy,  or  question  arising  under,  out of,  or
relating  to this  Agreement  or the  breach  thereof,  shall  be  referred  for
arbitration in the State of New Jersey to a neutral  arbitrator  selected by you
and the Company. The proceeding shall be governed by the Commercial Rules of the
American Arbitration Association then in effect or such rules last in effect (in
the event such  Association  is no longer in existence)  and the decision of the
arbitrator  shall be  governed  by the rule of law. If the parties are unable to
agree upon a neutral  arbitrator  within  thirty  (30) days after each party has
given the other written notice of the desire to submit the dispute,  controversy
or question  for  decision  as  aforesaid,  then  either  party may apply to the
American  Arbitration  Association for the appointment of a neutral  arbitrator,
or, if such  Association  is not then in  existence or does not desire to act in
the matter,  either party may apply to the Presiding Judge of the Superior Court
of any county in New Jersey for the appointment of a neutral  arbitrator to hear
the parties and settle the dispute,  controversy or question,  and such right to
submit a dispute  arising  hereunder  to  arbitration  and the  decision  of the
neutral  arbitrator  shall be final,  conclusive  and binding on all  interested
persons  and  no  action  at  law or in  equity  shall  be  instituted,  or,  if
instituted,  further  prosecuted by either party other than to enforce the award
of the neutral arbitrator.  You and the Company shall each bear all your and its
own costs and attorney fees,  except that the Company shall pay the costs of any
arbitrator appointed hereunder as well as the copy of any official transcript of
the proceeding.

         The  construction,  interpretation  and  performance  of this Agreement
shall be governed by the laws of the State of New Jersey,  without regard to its
conflict of laws rule.

         John,  I am  happy to  present  this  special  arrangement  to you.  It
recognizes the extraordinary  contribution you have made to our business. If you
agree with the terms and  conditions  detailed  above,  please enter your payout
election  and  initial  in the  spaces  provided  on page 2,  sign and date this
Agreement in the spaces  provided below and, prior to November 14, 1997,  return
the original executed copy to me.

                                   Sincerely,





Attachment



______________________________     ______________________________
Acknowledged and Agreed to         Date
John C. Petrillo