UNICOM CORP
S-4 POS, 1994-09-27
ELECTRIC SERVICES
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                As filed with the Securities and Exchange Commission
                                on September 27, 1994


                                                     Registration No. 33-52109

     ==========================================================================
                          SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON, D.C. 20549
                                 --------------------

                            POST-EFFECTIVE AMENDMENT NO. 1
                                          ON
                                       FORM S-8                              
                                          TO
                          REGISTRATION STATEMENT ON FORM S-4
                                        Under
                              The Securities Act of 1933
                                ---------------------
                                  UNICOM CORPORATION
                (Exact Name of Registrant as Specified in Its Charter)

           Illinois                                 36-3961038
     (State or Other Jurisdiction of                (I.R.S. Employer 
     Incorporation or Organization)                 Identification No.)

     37th Floor, 10 South Dearborn Street
     P.O. Box A-3005
     Chicago, Illinois                               60690-3005
     (Address of Principal Executive Offices)        (Zip code)

                             Commonwealth Edison Company
                         Employe Savings and Investment Plan                 
                                 (Full Title of Plan)
                             ---------------------------

                                   John C. Bukovski
                                    Vice President
                                  Unicom Corporation                         
                         37th Floor, 10 South Dearborn Street
                                   P.O. Box A-3005
                            Chicago, Illinois  60690-3005
                                    (312) 394-4321
                       (Name and Address of Agent for Service)

                                       Copy to:
                                   Richard W. Astle
                                   Sidley & Austin
                               One First National Plaza
                               Chicago, Illinois  60603
                                    (312) 853-7000
     ==========================================================================

     On September 1, 1994, the Registrant acquired all of the then outstanding
     shares of common stock of Commonwealth Edison Company ("ComEd"), as
     described in the Registration Statement on Form S-4 (Registration No. 33-
     52109) (the "Registration Statement").  This Post-Effective Amendment No. 1
     on Form S-8 (the "Post-Effective Amendment on Form S-8") to the
     Registration Statement is being filed to fulfill the Registrant's
     obligations under the Securities Act of 1933, as amended (the "Securities
     Act"), with respect to 484,403 shares of its common stock, without par
     value ("Common Stock"), which may be issued under the Employe Savings and
     Investment Plan (the "Plan") of ComEd.  In addition, pursuant to Rule
     461(c) under the Securities Act, this Post-Effective Amendment No. 1 on 
     Form S-8 also covers an indeterminate amount of interests to be offered or
     sold pursuant to the employee benefit plan described herein.

<PAGE>

                                       PART II

                  INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


          ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

                    The following documents heretofore filed with the
          Securities and Exchange Commission are incorporated herein by
          reference:

                    (a)  Annual Report on Form 10-K of ComEd for the year
          ended December 31, 1993 (as amended by the Form 10-K/A-1 filed on
          August 31, 1994).

                    (b)  Quarterly Reports on Form 10-Q of ComEd for the
          quarterly periods ended March 31, 1994 and June 30, 1994 (as
          amended by the Form 10-Q/A-1 filed on August 19, 1994).

                    (c)  Current Report on Form 8-K/A-1 of ComEd dated
          January 28, 1994 and Current Report on Form 8-K of ComEd dated
          June 24, 1994.

                    (d)  The description of the Registrants's common stock,
          without par value (the "Common Stock"), which is contained in the
          registration statement on Form 8-B filed under the Securities
          Exchange Act of 1934, as amended (the "Exchange Act"), including
          any subsequent amendment or any report filed for the purpose of
          updating such description.

                    (e)  The Annual Report on Form 11-K of the ComEd
          Employe Savings and Investment Plan for the year ended December
          31, 1993.

                    All documents filed by Registrant pursuant to
          Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to
          the filing of a post-effective amendment which indicates that all
          securities offered hereby have been sold or which deregisters all
          securities then remaining unsold, shall be deemed to be
          incorporated by reference into this Post-Effective Amendment on
          Form S-8 and to be a part hereof from the respective dates of
          filing of such documents (such documents, and the documents
          enumerated above, being hereinafter referred to as "Incorporated
          Documents").


          ITEM 4.  DESCRIPTION OF SECURITIES.

                    Not applicable.


          ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

                    Not applicable.


                                         II-1

<PAGE>

          ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

                    Certain provisions of the Illinois Business Corporation
          Act of 1983, as amended, provide that the Registrant may, and in
          some circumstances must, indemnify the directors and officers of
          the Registrant and of each subsidiary company against liabilities
          and expenses incurred by such person by reason of the fact that
          such person was serving in such capacity, subject to certain
          limitations and conditions set forth in the statute.  The
          Registrant's Articles of Incorporation and By-Laws provide that
          the Registrant will indemnify its directors and officers, and may
          indemnify any person serving as director or officer of another
          business entity at the Registrant's request, to the extent
          permitted by the statute.

                    The Registrant maintains liability insurance policies
          which indemnify the Registrant's directors and officers, the
          directors and officers or subsidiaries of the Registrant, and the
          trustees of the Service Annuity Funds, against loss arising from
          claims by reason of their legal liability for acts as such
          directors, officers or trustees, subject to limitations and
          conditions as set forth in the policies.  Among other
          limitations, the primary policy states that no coverage is
          provided for loss representing "amounts which are deemed
          uninsurable under the law pursuant to which this policy shall be
          construed".

                    The Registrant indemnifies assistant officers and other
          employees against liabilities and expenses incurred by reason of
          acts performed in connection with the operations of the various
          employee benefit systems of the Registrant and its subsidiaries. 


          ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.

                    Not applicable.


          ITEM 8.  EXHIBITS.

                    The exhibits accompanying this Post-Effective Amendment
          on Form S-8 are listed on the accompanying Exhibit Index.


          ITEM 9.  UNDERTAKINGS.

                    (a)  The undersigned registrant hereby undertakes:

                    (1)  To file, during any period in which offers or
          sales are being made, a post-effective amendment to this
          registration statement:

                    (i)  To include any prospectus required by
               Section 10(a)(3) of the Securities Act of 1933;



                                         II-2

<PAGE>

                    (ii)  To reflect in the prospectus any facts or events
               arising after the effective date of the registration
               statement (or the most recent post-effective amendment
               thereof) which, individually or in the aggregate, represent
               a fundamental change in the information set forth in the
               registration statement; and

                    (iii)  To include any material information with respect
               to the plan of distribution not previously disclosed in the
               registration statement or any material change to such
               information in the registration statement;

          provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do
          not apply if the registration statement is on Form S-3 or Form   
          S-8, and the information required to be included in a post-
          effective amendment by those paragraphs is contained in periodic
          reports filed with or furnished to the Securities and Exchange
          Commission by the registrant pursuant to Section 13 or 15(d) of
          the Securities Exchange Act of 1934 that are incorporated by
          reference in the registration statement.

                    (2)  That, for purpose of determining any liability
          under the Securities Act of 1933, each such post-effective
          amendment shall be deemed to be a new registration statement
          relating to the securities offered therein, and the offering of
          such securities at that time shall be deemed to be the initial
          bona fide offering thereof.

                    (3)  To remove from registration by means of a post-
          effective amendment any of the securities being registered which
          remain unsold at the termination of the offering.

                    (b)  The undersigned registrant hereby undertakes that,
          for purposes of determining any liability under the Securities
          Act of 1933, each filing of the registrant's annual report
          pursuant to Section 13(a) or 15(d) of the Securities Exchange Act
          of 1934 (and, where applicable, each filing of an employee
          benefit plan's annual report pursuant to Section 15(d) of the
          Securities Exchange Act of 1934) that is incorporated by
          reference in the registration statement shall be deemed to be a
          new registration statement relating to the securities offered
          therein, and the offering of such securities at that time shall
          be deemed to be the initial bona fide offering thereof.

                    (c)  Insofar as indemnification for liabilities arising
          under the Securities Act of 1933 may be permitted to directors,
          officers and controlling persons of the registrant pursuant to
          the foregoing provisions, or otherwise, the registrant has been
          advised that in the opinion of the Securities and Exchange
          Commission such indemnification is against public policy as
          expressed in the Act and is, therefore, unenforceable.  In the
          event that a claim for indemnification against such liabilities
          (other than the payment by the registrant of expenses incurred or
          paid by a director, officer or controlling person of the
          registrant in the successful defense of any action, suit or


                                         II-3

<PAGE>

          proceeding) is asserted by such director, officer or controlling
          person in connection with the securities being registered, the
          registrant will, unless in the opinion of its counsel the matter
          has been settled by controlling precedent, submit to a court of
          appropriate jurisdiction the question whether such
          indemnification by it is against public policy as expressed in
          the Act and will be governed by the final adjudication of such
          issue.










                                         II-4

<PAGE>

                                      SIGNATURES

                    The Registrant.  Pursuant to the requirements of the
          Securities Act of 1933, the registrant certifies that it has
          reasonable grounds to believe that it meets all of the
          requirements for filing on Form S-8 and has duly caused this
          Post-Effective Amendment on Form S-8 to be signed on its behalf
          by the undersigned, thereunto duly authorized, in the City of
          Chicago, State of Illinois, on this 27th day of September, 1994.


                                        UNICOM CORPORATION


                                        By:  /s/ James J. O'Connor      
                                            ----------------------------
                                             James J. O'Connor, Chairman


                    Pursuant to the requirements of the Securities Act of
          1933, this Post-Effective Amendment on Form S-8 has been signed
          by the following persons in the capacities indicated on this 27th
          day of September, 1994.

               Signature                            Title
               ---------                            -----

             /s/ James J. O'Connor          Chairman and Director
          ---------------------------        (principal executive officer)
               James J. O'Connor             


             /s/ John C. Bukovski           Vice President
          ---------------------------        (principal financial officer)
               John C. Bukovski              


             /s/ Roger F. Kovack            Comptroller
          ---------------------------        (principal accounting officer)
               Roger F. Kovack               


                  *                         Director
          ---------------------------
               Jean Allard


                  *                         Director
          ---------------------------
               James W. Compton


                  *                         Director
          ---------------------------
               Sue L. Gin


                                         II-5

<PAGE>
      
               Signature                          Title               
               ---------                          -----


                  *                         Director
          ---------------------------
               Donald P. Jacobs


                  *                         Director
          ---------------------------
               George E. Johnson



                  *                         Director
          ---------------------------
               Harvey Kapnick


                  *                         Director
          ---------------------------
               Byron Lee, Jr.


                  *                         Director
          ---------------------------
               Edward A. Mason


                  *                         Director
          ---------------------------
               Frank A. Olson


             /s/ Samuel K. Skinner          President and Director
          ---------------------------
               Samuel K. Skinner



          *By  /s/ David A. Scholz          
             ---------------------------
             David A. Scholz, Attorney-in-fact

      
                                         II-6
<PAGE>
      
                    The Plan.  Pursuant to the requirements of the
          Securities Act of 1933, the Members of the Committee that
          administers the Commonwealth Edison Company Employe Savings and
          Investment Plan have duly caused this Post-Effective Amendment on
          Form S-8 to be signed on its behalf by the undersigned, thereunto
          duly authorized, in the City of Chicago, State of Illinois, on
          this 27th day of September, 1994.


                                   COMMONWEALTH EDISON COMPANY
                                   EMPLOYE SAVINGS AND INVESTMENT PLAN



                                   By:  /s/ James J. O'Connor     
                                       ---------------------------
                                        James J. O'Connor
                                        Member

                                        /s/ John C. Bukovski      
                                       ---------------------------
                                        John C. Bukovski
                                        Member

                                        /s/ J. Stanley Graves     
                                       ---------------------------
                                        J. Stanley Graves
                                        Member

                                        /s/ Roger F. Kovack       
                                       ---------------------------
                                        Roger F. Kovack
                                        Member

                                        /s/ Dennis F. O'Brien     
                                       ---------------------------
                                        Dennis F. O'Brien
                                        Member

                                        /s/ Samuel K. Skinner     
                                       ---------------------------
                                        Samuel K. Skinner
                                        Member

                                        /s/ Pamela B. Strobel     
                                       ---------------------------
                                        Pamela B. Strobel
                                        Member









                                         II-7

<PAGE>

              INDEX TO EXHIBITS TO POST-EFFECTIVE AMENDMENT ON FORM S-8
              ---------------------------------------------------------

          Exhibit        
          Number         Description of Document
          -------        -----------------------

          @(4)-1         Articles of Incorporation of the
                         Company effective January 28, 1994.

          @(4)-2         By-Laws of the Company effective
                         January 28, 1994.

          *(4)-3         Commonwealth Edison Company Employe
                         Savings and Investment Plan, as
                         amended and restated effective July
                         1, 1992 and further amended by
                         Amendment No. 1 effective June 1,
                         1993, Amendment No. 2 effective
                         June 1, 1994 and Amendment No. 3
                         effective September 1, 1994.

          *(4)-4         Trust Agreement between ComEd and
                         The First National Bank of Chicago,
                         as amended by Amendment No. 1 dated
                         October 1, 1985, Amendment No. 2
                         dated July 1, 1989, Amendment
                         No. 3 dated June 6, 1991 and Amendment 
                         No. 4 effective September 1, 1994.

          @(5)           Opinion of Sidley & Austin.

          (23)-1         Consent of Sidley & Austin
                         (included in Exhibit 5 above).

          *(23)-2        Consent of Arthur Andersen LLP.

          *(24)          Powers of Attorney.


          ----------------
          *Filed herewith.

          @Filed with the Registrant's Registration Statement on Form S-4
           (Registration No. 33-52109) to which this Post-Effective
           Amendment on Form S-8 is being made.



                                                 Exhibit (4)-3
                                                 Unicom Corporation
                                                 Form S-8 
                                                 File No. 33-52109

                                         


                                 COMMONWEALTH EDISON

                         EMPLOYE SAVINGS AND INVESTMENT PLAN

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

                   (As Amended and Restated Effective July 1, 1992)








                                                         





          --------------------
          Retyped to reflect Amendments 1 through 3.
<PAGE>
      
                                  TABLE OF CONTENTS



          ARTICLE I      General  . . . . . . . . . . . . . . . . . . .   1

          ARTICLE II     Definitions and Construction . . . . . . . . .   1

                         2.1  Definitions . . . . . . . . . . . . . . . . 1
                         2.2  Construction  . . . . . . . . . . . . . . . 5

          ARTICLE III    Eligibility and Participation  . . . . . . . . . 5

                         3.1  Eligibility . . . . . . . . . . . . . . . . 5
                         3.2  Participation . . . . . . . . . . . . . . . 5
                         3.3  Re-Employment . . . . . . . . . . . . . . . 6
                         3.4  Leased Employes . . . . . . . . . . . . . . 6

          ARTICLE IV     Contributions  . . . . . . . . . . . . . . . .   6

                         4.1  Basic Savings Account . . . . . . . . . . . 6
                         4.2  Compensation Conversion Account . . . . . . 7
                         4.3  Employer Contribution Account. . . . . . . .8
                         4.4  Maximum Additions . . . . . . . . . . . . . 8
                         4.5  Adjustments to Accounts . . . . . . . . .  11
                         4.6  Time and Form of Contributions  . . . . .  16
                         4.7  Transfers of Property from Other Trusts .  16
                         4.8  Rollover Contributions  . . . . . . . . .  16
                         4.9  Special Accounting and Investment Rules
                              for Qualified Total Distributions or
                              Direct Trust Transfers  . . . . . . . . .  17
                         4.10 Special Investment Rules for Qualified
                              Total Distributions and Direct Trust
                              Transfers upon Termination of the
                              Commonwealth Edison Company Employe
                              Stock Ownership Plan  . . . . . . . . . .  17

          ARTICLE V      Investment Funds . . . . . . . . . . . . . . .  18

                         5.1  Description of Investment Funds . . . . .  18
                         5.2  Participant's Election of Investment
                              Fund  . . . . . . . . . . . . . . . . . .  18

          ARTICLE VI     Allocations to Participants' Accounts  . . . .  19

                         6.1  Individual Accounts . . . . . . . . . . .  19
                         6.2  Valuations and Adjustments  . . . . . . .  19
                         6.3  Expenses  . . . . . . . . . . . . . . . .  21

                                         -i-
<PAGE>
      
          ARTICLE VII    Benefits . . . . . . . . . . . . . . . . . . .  21

                         7.1  Amount of Benefits  . . . . . . . . . . .  21
                         7.2  Eligibility for Benefits on Termination
                              of Employment . . . . . . . . . . . . . .  21
                         7.3  Account Withdrawals . . . . . . . . . . .  22
                         7.4  Vesting and Forfeiture of Accounts  . . .  25
                         7.5  Payment of Benefits . . . . . . . . . . .  28
                         7.6  Designation of Beneficiary  . . . . . . .  31
                         7.7  Loans . . . . . . . . . . . . . . . . . .  33

          ARTICLE VIII   Trust Fund . . . . . . . . . . . . . . . . . .  35

                         8.1  Trust Fund  . . . . . . . . . . . . . . .  35

          ARTICLE IX     Administration . . . . . . . . . . . . . . . .  35

                         9.1  Allocation of Responsibility among
                              Fiduciaries for Plan and Trust
                              Administration  . . . . . . . . . . . . .  35
                         9.2  Appointment of the Committee  . . . . . .  36
                         9.3  Claims Procedure  . . . . . . . . . . . .  36
                         9.4  Records and Reports . . . . . . . . . . .  36
                         9.5  Other Committee Powers and Duties . . . .  37
                         9.6  Rules and Decisions . . . . . . . . . . .  37
                         9.7  Committee Procedures  . . . . . . . . . .  38
                         9.8  Authorization of Benefit Payments . . . .  38
                         9.9  Application and Forms for Benefits  . . .  38
                         9.10 Facility of Payment . . . . . . . . . . .  38
                         9.11 Voting of Unicom Corporation Common
                              Stock Held by Trustee . . . . . . . . . .  38

          ARTICLE X      Miscellaneous  . . . . . . . . . . . . . . . .  39

                         10.1 Non-guarantee of Employment . . . . . . .  39
                         10.2 Rights to Fund Assets . . . . . . . . . .  39
                         10.3 Non-alienation of Benefit . . . . . . . .  39
                         10.4 Discontinuance of Employer
                              Contributions . . . . . . . . . . . . . .  39
                         10.5 Notice of Address . . . . . . . . . . . .  40
                         10.6 Applicable Law  . . . . . . . . . . . . .  40

          ARTICLE XI     Amendments and Action by Employer  . . . . . .  40

                         11.1 Amendments  . . . . . . . . . . . . . . .  40
                         11.2 Action by Employers . . . . . . . . . . .  40

          ARTICLE XII    Successor Employer and Merger or
                         Consolidation of Plans . . . . . . . . . . . .  40

                         12.1 Successor Employer  . . . . . . . . . . .  40
                         12.2 Plan Assets . . . . . . . . . . . . . . .  41



                                         -ii-
<PAGE>
      
          ARTICLE XIII   Plan Termination . . . . . . . . . . . . . . .  41

                         13.1 Right to Terminate  . . . . . . . . . . .  41
                         13.2 Partial Termination . . . . . . . . . . .  42
                         13.3 Liquidation of the Trust Fund . . . . . .  42
                         13.4 Manner of Distribution  . . . . . . . . .  42

          ARTICLE XIV    Top-Heavy Provisions . . . . . . . . . . . . .  42

                         14.1 Top-Heavy Provisions  . . . . . . . . . .  42















                                        -iii-
<PAGE>

                                 COMMONWEALTH EDISON
                         EMPLOYE SAVINGS AND INVESTMENT PLAN
                       
                   (As Amended and Restated Effective July 1, 1992)
                                   
                                      ARTICLE I
                                    
                                       General
                                     
                    In order to provide for a systematic savings program
          for eligible employes and in order to supplement such savings
          with employer contributions, Commonwealth Edison Company
          (hereinafter referred to as the "Company") established the
          Commonwealth Edison Employe Savings and Investment Plan
          (hereinafter referred to as the "Plan"), the terms and conditions
          of which Plan, as amended and restated effective January 1, 1989,
          are hereinafter set forth.
                                   
                                      ARTICLE II
                                   
                             Definitions and Construction
                          
                    2.1  Definitions:  The following words and phrases,
          when used herein, unless their context clearly indicates
          otherwise, shall have the following respective meanings:

                    (a)  "Account(s)":  Any or all of the accounts
               maintained for a Participant as described in (c), (j), (o)
               and (dd) below.

                    (b)  "Active Participant":  A Participant who has in
               effect an authorization for either or both of (i) the
               deduction of Participant's deposits as provided in
               Section 4.1(a) or (ii) a reduction in Compensation as
               provided in Section 4.2.

                    (c)  "Basic Savings Account":  The account maintained
               for a Participant to record his deposits to the Trust Fund
               pursuant to Section 4.1 and adjustments relating thereto.

                    (d)  "Beneficiary":  The person or persons designated,
               in accordance with the provisions of Section 7.6, to receive
               the Participant's Account balance in the event of the
               Participant's death.

                    (e)  "Board":  The Board of Directors of the Company.

                    (f)  "Code":  The Internal Revenue Code of 1986, as
               amended from time to time.
<PAGE>

                    (g)  "Committee":  The committee appointed under the
               provisions of Section 9.2.

                    (h)  "Company":  Commonwealth Edison Company, a
               corporation organized and existing under the laws of the
               State of Illinois, or its successor or successors.

                    (i) "Compensation":  The normal base pay of an Employe
               from an Employer for personal services rendered, including
               any salary continuation or severance allowance under a
               severance arrangement of an Employer, nuclear additives for
               management employes and meter readers' bonuses, excluding,
               however, bonuses (other than meter readers' bonuses),
               overtime pay, shift premiums, fringe benefits, other
               extraordinary payments, and payments made in a form other
               than cash; but without reduction by the amount of any
               contributions made by the Employer on behalf of the Employe
               to his Compensation Conversion Account pursuant to
               Section 4.2 or under the Commonwealth Edison Benefits
               Contribution Options or the Commonwealth Edison Child Care
               Flexible Spending Account.  For purposes of the preceding
               sentence, the normal base pay of an Employe who works and is
               compensated based on a shift schedule other than a basic
               work week consisting of five regularly scheduled eight-hour
               work days shall be computed by multiplying the number of
               regularly scheduled basic work hours for which such Employe
               is paid by his basic hourly rate, determined without regard
               to any premium payments made at an overtime rate for such
               work.  A Participant's compensation (reportable on a Form W-
               2) from the Employers and Subsidiaries for any Plan Year in
               excess of $200,000 (as adjusted for increases in the cost of
               living in accordance with Section 415(d) of the Code) shall
               not be taken into account in determining the Participant's
               Compensation or for any purpose under the Plan.  Notwith-
               standing the preceding sentence, effective for Plan Years
               beginning on or after January 1, 1996, a Participant's
               compensation (reportable on a Form W-2) from the Employers
               and Subsidiaries for any Plan Year in excess of $150,000
               (adjusted for increases in the cost of living in accordance
               with Section 401(a)(17) of the Code) shall not be taken into
               account in determining the Participant's Compensation or for
               any purpose under the Plan.

                    (j)  "Compensation Conversion Account":  The account
               maintained for a Participant to record contributions made by
               an Employer pursuant to Section 4.2 and adjustments relating
               thereto.

                    (k)  "Disability":  A physical or mental condition
               which, in the judgment of the Committee, based upon medical
               reports and other evidence satisfactory to the Committee,
               permanently prevents an Active Participant or Inactive



                                         -2-
<PAGE>
                                         
               Participant from satisfactorily performing his usual duties
               or the duties of such other position available to him and
               for which he is qualified by reason of his training,
               education or experience.

                    (l)  "Effective Date":  March 1, 1983.

                    (m)  "Employe":  Any person, on or after the Effective
               Date, receiving regular stated salary or wages from and
               rendering service to an Employer, including a person
               receiving salary continuation or severance allowance under a
               severance arrangement of an Employer, excluding, however,
               (i) an employe of Cotter Corporation who is not classified
               as a salaried employee, (ii) an employe on an approved leave
               of absence, and (iii) any person who is a leased employe.

                    (n)  "Employer":  The Company, Commonwealth Edison
               Company of Indiana, Inc., Cotter Corporation, Northwind,
               Inc., Unicom Corporation and any other Subsidiary of the
               Company or Unicom Corporation, designated from time to time
               by the Board which adopts the Plan.

                    (o)  "Employer Contribution Account":  The account
               maintained for a Participant to record his share of the
               contributions by Employers pursuant to Section 4.3 and
               adjustments relating thereto.

                    (p)  "ERISA":  The Employe Retirement Income Security
               Act of 1974, as amended from time to time.

                    (q)  "Forfeiture":  The portion of a Participant's
               Employer Contribution Account which is forfeited because of
               termination of employment before full vesting in accordance
               with Section 7.4(c).

                    (r)  "Former Participant":  A Participant whose
               employment with the Employers and the Subsidiaries has
               terminated and who (i) is receiving his benefits in
               accordance with Section 7.5(b), (ii) was not fully vested
               upon termination but who has not yet forfeited the
               segregated portion of his Employer Contribution Account, or
               (iii) is having distribution of his Account deferred to age
               65 in accordance with the provisions of Section 7.5.

                    (s)  "Hour of Service":  An hour (within the meaning of
               Department of Labor Reg. Section 2530.200b-2(a)) for which an
               Employe is directly or indirectly paid, or entitled to
               payment, by an Employer or Subsidiary, whether for the
               performance of duties or otherwise, including back pay.

                    (t) "Inactive Participant":  A Participant (i) whose
               authorization for the deduction of Participant's deposits as



                                         -3-
<PAGE>

               provided in Section 4.1(a) and for a reduction in
               Compensation as provided in Section 4.2 is terminated
               (A) pursuant to Section 4.1(a) and 4.2 or 7.3(d) while
               continuing in the employ of an Employer or (B) because he
               ceases to be an Employe but remains an employe of an
               Employer or a Subsidiary, or (ii) who makes a lump sum
               contribution under Section 4.1(b) without having become an
               Active Participant.

                    (u)  "Investment Fund(s)":  Any or all of the funds
               provided for in Section 5.1.

                    (v)  "Participant":  An Employe participating in the
               Plan in accordance with the provisions of Article III,
               including an Active Participant and an Inactive Participant,
               or an individual who is a Former Participant.

                    (w)  "Plan":  Commonwealth Edison Employe Savings and
               Investment Plan, as amended from time to time.

                    (x)  "Plan Year":  The 12-month period commencing on
               January 1 and ending on December 31, except that the initial
               Plan Year commenced March 1, 1983 and ended on December 31,
               1983.

                    (y)  "Subsidiary":  A corporation of which 51% or more
               of the voting securities are owned by the Company or Unicom
               Corporation directly or indirectly through one or more other
               corporations, or any other entity deemed to be an affiliated
               company under Sections 414(b), (c) or (m) of the Code.

                    (z)  "Trust":  The trust agreement for management and
               administration of the Trust Fund.

                    (aa)  "Trustee":  The trustee or trustees of the Trust,
               and the successors and substitutes thereof, appointed by the
               Company in accordance with the Trust to manage and
               administer the assets of the Trust Fund.

                    (bb)  "Trust Fund":  The trust fund held by the Trustee
               under which monies contributed under the Plan are held and
               invested and from which such monies are distributed pursuant
               to the terms of the Plan, as such trust fund may be amended,
               modified, supplemented or replaced from time to time.  The
               Trust Fund shall consist of the Investment Funds, as
               described in Section 5.1.

                    (cc)  "Valuation Date":  The last day of each calendar
               month.

                    (dd)  "Rollover Account":  The account maintained for a
               Participant to record direct trust transfers on behalf of,



                                         -4-
<PAGE>
      
               and rollover contributions by, a Participant under Sections
               4.7 and 4.8, respectively.

                    2.2  Construction:  The masculine gender, where
          appearing in the Plan, shall be deemed to include the feminine
          gender, unless the context clearly indicates to the contrary.


                                     ARTICLE III
                                   
                            Eligibility and Participation
                          
                    3.1  Eligibility:  An Employe who is not on the
          management or executive payroll shall be eligible to become a
          Participant on the first day of the payroll period beginning
          coincident with or next following the date he both is an Employe
          and has completed three months of service with an Employer or any
          Subsidiary (regardless of the number of Hours of Service actually
          performed).  An Employe who is on the management or executive
          payroll shall be eligible to become a Participant on the first
          day of the payroll period beginning coincident with or next
          following the date of his employment.

                    3.2  Participation:  An eligible Employe may elect to
          become a Participant in the Plan as of the date he first becomes
          eligible to participate as provided in Section 3.1, or the first
          day of any payroll period thereafter, by filing prior written
          notice of such election with the Committee, accompanied by (i)
          either or both of an authorization for (A) the deduction of
          Participant's deposits as provided in Section 4.1(a) and (B) a
          reduction in Compensation as provided in Section 4.2 and (ii) an
          election as to Investment Funds as provided in Section 5.2.  Upon
          filing such election notice, he shall become a Participant as of
          the date elected if such date is at least 30 days after filing
          the election notice or, if such date is less than 30 days
          thereafter or a date is not specified, as of the first day of the
          first payroll period practicable beginning not more than 30 days
          after filing the election notice.  An eligible Employe who is on
          the management or executive payroll may elect on the date of his
          employment in accordance with the provisions of this Section 3.2
          to become a Participant commencing with the first day of the
          payroll period beginning coincident with or next following the
          date of his employment.  An Employe eligible to participate as
          provided in Section 3.1 may elect to make a lump sum contribution
          as provided in Section 4.1(b) without electing deduction of
          Participant's deposits as provided in Section 4.1(a) or
          authorizing a reduction in his Compensation as provided in
          Section 4.2, by filing an election form and making an election as
          to Investment Funds as provided in Section 5.2 and shall
          thereupon become an Inactive Participant.





                                         -5-
<PAGE>
      
                    3.3  Re-Employment:  If a Participant's employment is
          terminated and thereafter he is rehired as an Employe, he shall
          be eligible to become an Active Participant commencing with the
          first day of the payroll period beginning coincident with or next
          following the date of his re-employment, and may elect to again
          become an Active Participant as of such date, or the first day of
          any payroll period thereafter, as provided in Section 3.2.

                    3.4  Leased Employes:  If an individual who performed
          services as a leased employe (within the meaning of section
          414(n)(2) of the Code) with an Employer or any Subsidiary becomes
          an Employe, or if an individual who formerly was an Employe
          becomes a leased employe with an Employer or any Subsidiary, then
          any period of service rendered by such individual as a leased
          employe that must be taken into account for purposes of
          determining the qualification of the Plan shall be taken into
          account to the same extent it would have been had such service
          been rendered as an Employe for the purposes of determining (i)
          whether and when such individual is eligible to participate in
          the Plan under Section 3.1 and (ii) his vested interest in his
          Employer Contributions Account under Section 7.4(c)(i).


                                      ARTICLE IV
                                   
                                    Contributions
                                  
                    4.1  Basic Savings Account:  At the time an Employe
          elects to become a Participant, he shall authorize the Employer
          to do one or both of the following:  (i) make regular payroll
          deductions from his Compensation for deposit with the Trustee as
          provided in Section 4.1(a); (ii) reduce his Compensation as
          provided in Section 4.2.  In addition, an Employe eligible to
          become a Participant as provided in Section 3.1 may make a lump
          sum contribution to his Basic Savings Account as provided in
          Section 3.2 and 4.1(b).

                    (a)  Subject to the provisions of Sections 4.4 and 4.5,
               an Active Participant may authorize the Employer to make
               payroll deductions from his Compensation for deposit to his
               Basic Savings Account in an amount equal to 1% of his
               Compensation per payroll period while an Active Participant
               or such multiple of 1% thereof, but not to exceed 10%, as he
               may designate.  The Employer shall deposit with the Trustee
               the sums so deducted.

                    A Participant may change the rate of his payroll
               deductions at any time by delivering written notice of the
               desired change to the Employer, such change to take effect
               as of the first day of the first payroll period practicable
               beginning not more than 30 days after filing the
               contributions rate change notice.



                                         -6-
<PAGE>
      
                    (b)  An Employe eligible to become a Participant,
               whether or not electing to become an Active Participant may
               elect to make a one-time lump sum contribution to his Basic
               Savings Account as of March 18, 1983; provided, however,
               that the amount of such lump sum contribution shall not
               exceed, subject to the provisions of Section 4.4, ten
               percent of the Employe's aggregate basic compensation
               through February 20, 1983 while a participant under a
               qualified defined benefit plan of an Employer.  Such lump
               sum contribution shall be made at such time and in such
               manner as the Committee shall determine under rules and
               regulations which are uniformly applied.

                    4.2  Compensation Conversion Account:  Subject to the
          provisions of Sections 4.4 and 4.5, an Active Participant may
          authorize the Employer to reduce his Compensation in an amount
          equal to 1% of his Compensation per payroll period while an
          Active Participant or such multiple of 1% thereof, but not to
          exceed 10%, as he may designate, and the Employer shall make
          contributions to the Trust Fund for allocation to the
          Compensation Conversion Account of each Active Participant who so
          authorizes in an amount equal to such reduction of his
          Compensation.

                    A Participant may change the rate of his Compensation
          reduction at any time by delivering written notice of the desired
          change to the Employer, such change to take effect as of the
          first day of the first payroll period practicable beginning not
          more than 30 days after filing the Compensation reduction rate
          change notice.

                    Notwithstanding the foregoing provisions of this
          Section 4.2, the maximum amount that may be contributed for any
          Plan Year to a Compensation Conversion Account on behalf of a
          Participant shall not exceed $7,000, as adjusted for increases in
          the cost of living in accordance with Section 402(g)(5) of the
          Code.  Each participant may, pursuant to such rules and at such
          time as determined by the Committee, submit a claim in writing to
          the Committee specifying the amount of contributions made to his
          Compensation Conversion Account for a calendar year that, when
          added to amounts contributed under other plans or arrangements
          described in Section 401(k), 408(k) or 403(b) of the Code, will
          exceed the limit described in the preceding sentence for such
          year.  Any such excess contributions, reduced by any amounts
          recharacterized or distributed pursuant to Section 4.5(a) and
          adjusted, in accordance with Treasury Regulations, to recognize
          any earnings, gains or losses for the calendar year in which such
          excess contributions were made, shall be distributed to the
          Participant not later than April 15 of the calendar year
          following the year for which such excess contributions were made. 
          If any distribution of excess contributions is made for a year
          pursuant to the preceding sentence, then any corresponding



                                         -7-
<PAGE>
      
          contributions allocated to the Participant's Employer
          Contributions Account, adjusted, in accordance with Treasury
          Regulations, to recognize any earnings, gains or losses for the
          calendar year in which such contributions were made, shall to the
          extent vested under Section 7.4(c)(i) be distributed at the same
          time, and to the extent not so vested shall be forfeited.

                    4.3  Employer Contribution Account:  Subject to the
          provisions of Section 4.4 and the following sentence, each
          Employer shall contribute for each payroll period matching
          contributions to the Trust Fund on behalf of each of its Active
          Participants in an amount equal to 55% (or, effective for payroll
          periods beginning on or after June 15, 1992, 70%) of the sum of
          (i) the amount of the Active Participant's deposits into the
          Trust Fund for such payroll period in accordance with Section
          4.1(a) and (ii) the amount contributed to the Trust Fund for such
          payroll period on behalf of the Active Participant in accordance
          with Section 4.2; provided, however, that in no event shall
          matching contributions be made for any payroll period in excess
          of 55% (or, effective for payroll periods beginning on or after
          June 15, 1992, 70%) of 5% of the Active Participant's
          Compensation for a payroll period beginning on or after June 3,
          1991.  Notwithstanding the preceding sentence, no Employer shall
          make a matching contribution on behalf of any part-time regular
          employe as defined in an agreement dated July 23, 1993 between
          the Company and the System Council U-25, I.B.E.W., unless such
          employe was an Active Participant on July 23, 1993 and elected
          pursuant to such agreement to become a part-time regular employe
          during the initial staffing period that began July 23, 1993 and
          ended December 31, 1993.

                    4.4  Maximum Additions:  Notwithstanding anything to
          the contrary contained herein, with respect to any Plan Year
          beginning on or after January 1, 1987 the total of Participant
          contributions made pursuant to Section 4.1, Employer
          contributions made pursuant to Sections 4.2 and 4.3, and
          Forfeitures allocated in accordance with Section 6.2(e), for such
          Plan Year for any Participant shall not, when combined with the
          "annual addition" allocated to his accounts for such Plan Year
          under all other defined contribution plans maintained by any
          Employer or Subsidiary, together with amounts treated as an
          "annual addition" for such Plan Year under Sections 415(1)(1) and
          419A(d)(2) of the Code, exceed the lesser of (i) 25% of the
          Participant's compensation (as defined below) from the Employers
          and Subsidiaries for such Plan Year (the "Compensation
          Limitation") or (ii) $30,000, the amount specified in Section
          415(c)(1)(A) of the Code, or, if greater, one-fourth of the
          defined benefit dollar limitation under Section 415(b)(1)(A) of
          the Code as in effect for such Plan Year (the "Dollar
          Limitation") except that the amount of the limitation under this
          subparagraph (ii) may be increased under a tax credit employe
          stock ownership plan of the Employer or Subsidiary to reflect the



                                         -8-
<PAGE>
      
          special dollar limitation for employe stock ownership plans
          contained in Section 415(c)(6) of the Code.  

                    In the event that any amounts are allocated to the
          Participant's Account in excess of the limits described in the
          preceding paragraph under the circumstances described in Treasury
          Regulation Section 1.415-6(b)(6), such excess shall be
          eliminated, after reducing such excess by any distributions made
          or required under the last paragraph of Section 4.2, as follows: 
          first by reducing the contributions made by the Participant
          pursuant to Section 4.1 that are allocated to his Account, next
          by reducing contributions made on behalf of the Participant
          pursuant to Section 4.2 that are allocated to his Account, next
          by reducing any Forfeitures allocated to his Account and finally
          by reducing any Employer contributions allocated to his Account. 
          The amount of contributions under Sections 4.1 and 4.2 that are
          reduced pursuant to the preceding sentence, adjusted, in
          accordance with Treasury Regulations, to recognize any earnings,
          gains or losses attributable thereto, shall be distributed to the
          Participant as soon as practicable after the reductions are made. 
          The amount of Forfeitures and Employer contributions reduced
          pursuant to the preceding sentence, adjusted, in accordance with
          Treasury Regulations, to recognize any earnings, gains or losses
          attributable thereto, shall be reallocated to the Employer
          Contribution Accounts of other Active Participants of the same
          Employer for such Plan Year, other than part-time regular
          employes who, pursuant to Section 4.3, do not have matching
          contributions allocated to their Accounts.

                    Notwithstanding the foregoing, the otherwise
          permissible "annual addition" for any Participant under this Plan
          shall be reduced to the extent necessary, as determined by the
          Committee, to prevent disqualification of the Plan under Section
          415 of the Code, which imposes the following additional
          limitations on the benefits payable to Participants who also may
          be participating in another tax-qualified pension, profit
          sharing, thrift, savings or stock bonus plan or in a welfare plan
          maintained by the Employer or a Subsidiary:  If the Participant
          is also covered under a qualified defined benefit plan of the
          Employer or a Subsidiary, the sum of a Participant's "defined
          benefit plan fraction" (as defined below) and his "defined
          contribution plan fraction" (as defined below) may not exceed
          1.0.  The provisions of the foregoing sentence shall not apply
          and no such reduction shall be made to the otherwise permissible
          "annual addition" under this Plan until the service annuity to
          which the Participant is entitled under the Commonwealth Edison
          Company Service Annuity System has been reduced to the maximum
          extent possible.  The "defined benefit plan fraction" shall be a
          fraction (not in excess of 1) the numerator of which is the
          projected annual benefit of the Participant under all defined
          benefit plans required to be taken into account, determined as of
          the end of the Plan Year, and the denominator of which is the



                                         -9-
<PAGE>
      
          lesser of (A) the product of 1.25 multiplied by the dollar
          limitation in effect under Section 415(b)(1)(A) of the Code for
          such Plan Year (or, if greater, by the Participant's current
          accrued benefit under such defined benefit plans as of December
          31, 1986) and (B) the product of 1.4 multiplied by the amount
          which may be taken into account under Section 415(b)(1)(B) of the
          Code with respect to the Participant for such Plan Year.  The
          "defined contribution plan fraction" shall be a fraction (not in
          excess of 1) the numerator of which is the sum of the "annual
          additions" as determined under Sections 415(c)(2), 415(1)(1) and
          419A(d)(2) of the Code (except that employe contributions made
          for any Plan Year prior to 1987 that were not treated as an
          annual addition for such year shall not be treated as an annual
          addition hereunder for any year after 1986) to the Participant's
          account under all defined contribution plans required to be taken
          into account, as of the end of the Plan Year, and the denominator
          of which is the sum of the "applicable maximum amount" of annual
          additions which could have been made under Section 415(c) of the
          Code for the Plan Year and for each prior calendar year of such
          Participant's employment with the Employers and Subsidiaries. 
          The "applicable maximum amount" of annual addition for any year
          shall be equal to the lesser of 1.25 multiplied by the Dollar
          Limitation in effect for such year, and 1.4 multiplied by the
          Compensation Limitation with respect to the Participant for such
          year.  The numerator of the "defined contribution plan fraction"
          shall be adjusted, where applicable, as prescribed by the
          Internal Revenue Service.

                    In the event the Plan is determined to be a "top-heavy
          plan" within the meaning of Section 416(g) of the Code with
          respect to any Plan Year beginning on or after January 1, 1984,
          then unless the requirements of Section 416(h)(2) of the Code are
          met with respect to the Plan, the number "1.0" shall be
          substituted for the number of "1.25" wherever it appears in this
          Section 4.4.

                    The "annual additions" for a Plan Year to a
          Participant's accounts in this Plan and in any other defined
          contribution plan maintained by the Employer is the sum during
          such Plan Year of 

                    (i)  the amount of Employer contributions allocated to
               such Participant's accounts,

                    (ii)  The amount of forfeitures allocated to such
               Participant's accounts,

                    (iii)  the amount allocated to any individual medical
               benefit account (as defined in section 415(l) of the Code)
               maintained on behalf of the Participant, and 





                                         -10-
<PAGE>
      
                    (iv)  the amount of contributions by the Participant to
               such Plan but excluding any rollover contribution (within
               the meaning of sections 401(a)(5), 403(a)(4) and 408(d)(3)
               of the Code) made to such Plan.

                    For purposes of this Section 4.4 and Section 14.1,
          Compensation shall mean a Participant's compensation reportable
          on a Form W-2, but excluding amounts so reportable on account of
          (i) a disposition of common stock of the Company, pursuant to the
          Company's Stock Purchase Plan and (ii) moving expenses deductible
          under section 217 of the Code and (iii) other items receiving
          special tax treatment within the meaning of Section 1.415-
          2(d)(2)(iv) of the regulations.

                    For purposes of making the determination described in
          the first paragraph of this Section 4.4 with respect to any Plan
          Year beginning on or after January 1, 1993, such determination
          may be made on a payroll period by payroll period basis rather
          than on the basis of cumulative compensation for an entire Plan
          Year, provided that such determination is made consistently for
          all Participants.  In the event that such determination is made
          on a payroll period basis, such determination shall be binding
          and conclusive, regardless of whether such determination may
          result in a lesser amount of contributions to the Plan than
          otherwise would be permitted if the determination were made on
          the basis of cumulative compensation for the entire Plan Year. 
          Notwithstanding the preceding sentence, a Participant's
          Compensation in excess of the limit set forth in Section
          401(a)(17) of the Code (adjusted for changes in the cost of
          living pursuant thereto) shall not be taken into account for
          purposes of this Section 4.4 and Section 14.1.

                    4.5  Adjustments to Accounts:  (a) Compensation
          Conversion Accounts.  Notwithstanding the provisions of Section
          4.2, if the Actual Deferral Percentage for the Eligible Employes
          who for any Plan Year are Highly-Compensated Employes exceeds, or
          in the judgment of the Committee is likely to exceed, the greater
          of (1) and (2) as follows:

                    (1)  The Actual Deferral Percentage for the Plan Year
               for all other Eligible Employes, multiplied by 1.25;

                    (2)  The Actual Deferral Percentage for all other
               Eligible Employes multiplied by 2; provided, however, that
               the Actual Deferral Percentage for the Eligible Employes who
               for the Plan Year are Highly-Compensated Employes may not
               exceed the Actual Deferral Percentage for all other Eligible
               Employes by more than two percentage points;

          then the amounts contributed, or to be contributed, to
          Compensation Conversion Accounts on behalf of Participants who
          are Highly-Compensated Employes for such Plan Year shall be



                                         -11-
<PAGE>
      
          reduced at such time and in such manner as the Committee shall
          determine under rules and regulations uniformly applied and
          consistent with applicable Treasury Regulations so that the
          Actual Deferral Percentage for the Eligible Employes who are
          Highly-Compensated Employes for such Plan Year does not exceed
          the greater of (1) and (2) above.  In order to accomplish the
          foregoing, the Committee, in its discretion, may reduce
          contributions previously made or adjust the amount of reductions
          in Compensation authorized pursuant to Section 4.2 for such
          period as may be required.  The amount by which contributions to
          a Participant's Compensation Conversion Account for a Plan Year
          are reduced shall be disregarded for purposes of the Actual
          Deferral Percentage under this paragraph (a) and under paragraph
          (c) of this section and shall be allocated to the Participant's
          Recharacterization Account to the extent that the sum of such
          amount and the amount of other contributions made to the
          Participant's Basic Savings Account for the Plan Year do not
          exceed 10% of the Participant's Compensation.  The amount that
          cannot be allocated to the Participant's Recharacterization
          Account because of the limitation set forth in the preceding
          sentence shall be paid to the Participant not later than March 15
          of the Plan Year following the Plan Year for which such reduction
          in contributions is made, together with any earnings, gains and
          losses attributable thereto for the Plan Year for which such
          reduction is determined.  The Committee shall notify each
          affected Participant, at the time (but not later than March 15 of
          the following Plan Year) and in the manner prescribed by Treasury
          Regulations, of (i) the amount of the Participant's contributions
          to his Compensation Conversion Account allocated to his
          Recharacterization Account pursuant to this Section 4.5 and of
          the amount, if any, that could not be so allocated because of the
          limitations set forth in this Section 4.5(a), (ii) the inclusion
          in the Participant's income of the amounts described in (i), and
          (iii) the year of such inclusion.

                    (b)  Basic Savings and Employer Contribution Accounts. 
          Notwithstanding the provisions of Section 4.l, Section 4.3 or
          paragraph (a) of this Section 4.5, if the Actual Contribution
          Percentage for the Eligible Employes who for any Plan Year are
          Highly-Compensated Employes exceeds, or in the judgment of the
          Committee is likely to exceed, the greater of (1) and (2) as fol-
          lows:

                    (1)  The Actual Contribution Percentage for the Plan
               Year for all other Eligible Employes, multiplied by 1.25;

                    (2)  The Actual Contribution Percentage for all other
               Eligible Employes, multiplied by 2; provided, however, that
               the Actual Contribution Percentage for the Eligible Employes
               who for the Plan Year are Highly-Compensated Employes may
               not exceed the Actual Contribution Percentage for all other
               Eligible Employes by more than two percentage points;



                                         -12-
<PAGE>
     
          then the amounts contributed, to be contributed or allocated to
          Basic Savings Accounts (including amounts reallocated or to be
          reallocated to Recharacterization Accounts) and Employer
          Contribution Accounts on behalf of Participants who are Highly-
          Compensated Employes for such Plan Year shall be reduced at such
          time and in such manner as the Committee shall determine under
          rules and regulations uniformly applied and consistent with
          applicable Treasury Regulations so that the Actual Contribution
          Percentage for the Eligible Employes who are Highly-Compensated
          Employes for such Plan Year does not exceed the greater of (1)
          and (2) above.  For purposes of making the computations required
          by the preceding sentence for any Plan Year, at the election of
          the Committee, all or a portion of amounts contributed to
          Participants' Compensation Conversion Accounts (and not
          reallocated to Participants' Recharacterization Accounts) may be
          treated as contributed to Participants' Basic Savings Accounts. 
          In order to accomplish the foregoing the Committee, in its
          discretion, may reduce contributions previously made or adjust
          the amount of payroll deductions from Compensation authorized
          pursuant to Section 4.1 for such period as may be required.  The
          amount by which contributions to a Participant's Basic Savings
          Account (including his Recharacterization Account) for a Plan
          Year are reduced, adjusted, in accordance with Treasury
          Regulations, to recognize any earnings, gains or losses for the
          Plan Year for which such reduction is determined, shall be paid
          to the Participant not later than March 15 of the Plan Year
          following the Plan Year for which such reduction in contributions
          is determined.  Upon the distribution of any amount to a
          Participant pursuant to the preceding sentence, then any
          corresponding contributions allocated to the Participant's
          Employer Contributions Account, adjusted, in accordance with
          Treasury Regulations, to recognize any earnings, gains or losses
          for the Plan Year for which such reduction is determined, shall
          to the extent vested under Section 7.4(c)(i) be distributed at
          the same time and to the extent not so vested, shall be
          forfeited.  

                    (c)  Multiple Use Limit.  Notwithstanding Sections 
          4.1, 4.2 or 4.3 or paragraphs (a) or (b) of this Section 4.5, if
          the sum of the Actual Deferral Percentage plus the Actual
          Contribution Percentage for the Eligible Employes who for any
          Plan Year are Highly-Compensated Employes, determined without
          regard to this paragraph (c), exceeds or, in the judgment of the
          Committee, is likely to exceed the greater of (A) and (B), where
          (A) equals the sum of 

                    (1)  125% of the greater of the Actual Deferral
               Percentage or the Actual Contribution Percentage of the
               Eligible Employes who are not Highly-Compensated Employes,
               plus





                                         -13-
<PAGE>
      
                    (2)  the sum of (I) the lesser of the Actual Deferral
               Percentage or the Actual Contribution Percentage of the
               Eligible Employes who are not Highly-Compensated Employes,
               plus (II) two percentage points, provided, however, that
               this amount shall not exceed twice the lesser of the Actual
               Deferral Percentage and the Actual Contribution Percentage
               of the Eligible Employes who are not Highly-Compensated
               Employes;

          and where (B) equals the sum of 

                    (1)  125% of the lesser of the Actual Deferral
               Percentage or the Actual Contribution Percentage of the
               Eligible Employes who are not Highly-Compensated Employes,
               plus

                    (2)  the sum of (I) the greater of the Actual Deferral
               Percentage or the Actual Contribution Percentage of the
               Eligible Employes who are not Highly-Compensated Employes,
               plus (II) two percentage points, however, this amount is not
               to exceed twice the greater of the Actual Deferral
               Percentage and the Actual Contribution Percentage of the
               Eligible Employes who are not Highly-Compensated Employes,

          then the amounts contributed to the Basic Savings Accounts on
          behalf of the Participants who are Highly-Compensated Employes
          shall be reduced pursuant to the rules contained in paragraph (b)
          of this Section 4.5 until such excess is eliminated.  If such
          excess is not so eliminated, then the amounts contributed to the
          Compensation Conversion Accounts on behalf of such Participants
          shall be reduced pursuant to the rules contained in paragraph (a)
          of this Section 4.5 until such excess is eliminated.

                    (d)  Definitions.  For purposes of this Section 4.5:

                    (1)  "Actual Deferral Percentage" for a specified group
               of Eligible Employes for a Plan Year shall be the average,
               rounded to the nearest one-hundredth of one percent, of the
               result (calculated separately for each Eligible Employe in
               such group and rounded to the nearest one-hundredth of one
               percent) obtained by dividing the amount contributed to the
               Compensation Conversion Account for each such Eligible
               Employe for such Plan Year by the Eligible Employe's
               Compensation for the portion of such Plan Year for which
               contributions to the Compensation Conversion Account were
               made or could have been made (disregarding any suspension
               required by Section 7.3(e)) for such Eligible Employe;

                    (2)  "Actual Contribution Percentage" for a specified
               group of Eligible Employes for a Plan Year shall be the
               average, rounded to the nearest one-hundredth of one
               percent, of the result (calculated separately for each



                                         -14-
<PAGE>
      
               Eligible Employe in such group and rounded to the nearest
               one-hundredth of one percent) obtained by dividing the
               amounts actually contributed to the Basic Savings Account
               and Employer Contribution Account, plus any amount allocated
               to the Recharacterization Account pursuant to paragraph (a)
               of this Section 4.5, for each such Eligible Employe for such
               Plan Year by the Eligible Employe's Compensation for the
               portion of such Plan Year for which contributions to the
               Basic Savings Account were made or could have been made
               (disregarding any suspension required by Section 7.3(e)) for
               such Eligible Employe;

                    (3)  "Highly-Compensated Employe" shall have the
               meaning assigned to the term "highly-compensated employee"
               by Section 414(q) of the Code and the regulations
               thereunder;

                    (4)  "Eligible Employe" shall mean an Employe who is
               eligible to become a Participant as provided in Section 3.l
               and who is required to be taken into account under
               applicable Treasury Regulations;


                    (5)  "Recharacterization Account" shall mean a
               subaccount established under a Participant's Basic Savings
               Account to which are allocated Compensation Conversion
               Contributions recharacterized pursuant to the third sentence
               of paragraph (a) of this Section 4.5; 

                    (6)  "Compensation" shall have the meaning provided in
               Section 414(s) of the Code and the regulations thereunder,
               provided, that an Employe's compensation for any Plan Year
               as so defined in excess of (i) for Plan Years beginning on
               or after January 1, 1989 and before January 1, 1996,
               $200,000 (adjusted for increases in the cost of living in
               accordance with Section 415(d) of the Code), and (ii) for
               Plan Years beginning on or after January 1, 1996, $150,000
               (adjusted for increases in the cost of living in accordance
               with Section 401(a)(17) of the Code) shall be disregarded;
               and

                    (7)  If any Employe is a 5% owner (under section
               416(i)(l)(B)(i) of the Code) or one of the ten most highly-
               compensated Employes of any Employer, the Employe's
               Compensation and the contributions to each of the Employe's
               Compensation Conversion Account, Basic Savings Account and
               Employer Contribution Account shall be aggregated,
               respectively, with the Compensation of such Employe's family
               members (as defined in section 414(q)(6)(B) of the Code) who
               are Employes and the contributions to each of such Accounts
               of such family members in applying the limitations set forth
               in this Section.



                                         -15-
<PAGE>
      
                    4.6  Time and Form of Contributions:  The Employer
          shall transmit to the Trustee deposits equal to deductions from
          Active Participants' Compensation under Section 4.1(a) and
          reductions from Active Participants' Compensation under Section
          4.2 no less frequently than bi-weekly.  The Employer's matching
          contribution under Section 4.3 on behalf of Active Participants
          shall be made in cash concurrently with such transfer and shall
          be held (i) prior to October 1, 1985, in Investment Fund A and
          (ii) on or after October 1, 1985, as elected by the Active
          Participant as provided in Section 5.2, provided, however, the
          Employer matching contributions made prior to October 1, 1985
          shall continue to be held in Investment Fund A until transferred
          to another Investment Fund pursuant to a change of investment
          election under Section 5.2.  Lump sum contributions made under
          Section 4.1(b) shall be transmitted to the Trustee by the
          Employer not later than March 18, 1983.

                    4.7  Transfers of Property from Other Trusts:  Upon the
          written request of an Employe (whether or not a Participant), the
          committee shall direct the Trustee to accept property transferred
          directly from the trustee of an employes' trust described in
          Section 401(a) of the Code which is exempt from tax under Section
          501(a) of the Code on behalf of such Employe (any such transfers
          of property being hereinafter called a "direct trust transfer"). 
          Notwithstanding the foregoing, the Committee shall not direct the
          Trustee to accept a direct trust transfer if in the Committee's
          judgment accepting such transfer would cause the Plan to be
          subject to the provisions of Section 417 of the Code or violate
          any provision of the Code or regulations and shall not be
          required to direct the Trustee to accept a direct trust transfer
          to the extent it consists of property other than cash.

                    4.8  Rollover Contributions:

                    (a)  Requirements for Rollover Amounts.  If an Employe
          (whether or not a Participant) receives an "eligible rollover
          distribution" (within the meaning of Section 402(c)(4) of the
          Code) from an Employes' trust described in Section 401(a) of the
          Code which is exempt from tax under Section 501(a) of the Code,
          then such Employe may contribute to the Plan as a rollover
          contribution an amount not in excess of the amount of such
          eligible rollover distribution (including the proceeds from the
          sale of any property received as a part of such eligible rollover
          distribution) less the amount considered contributed to such
          trust by the Employe (determined by applying Section
          402(d)(4)(D)(i) of the Code).  If an Employe (whether or not a
          Participant) receives a distribution or distributions from an
          individual retirement account or annuity (within the meaning of
          Section 408 of the Code) and the amount received represents the
          entire amount in such account (or the entire value of such
          annuity) and no amount in such account (or no part of the value
          of such annuity) is attributable to any source other than a



                                         -16-
<PAGE>
      
          rollover distribution (within the meaning of Section 402 of the
          Code) from an employes' trust described in Section 401(a) of the
          Code which is exempt from tax under Section 501(a) of the Code
          and any earnings thereon, then such Employe may contribute to the
          Plan as a rollover contribution such distribution or
          distributions.

                    (b)  Delivery of Rollover Amounts.  Any rollover amount
          to be contributed to the Plan pursuant to this Section shall be
          either (i) delivered by the Employe to the Committee and by the
          Committee to the Trustee on or before the 60th day after the day
          on which the Employe received an eligible rollover distribution
          or such later date as may be prescribed by law, or (ii) directly
          transferred on behalf of the Employe by the trustee of the
          employe's trust or by the custodian of the individual retirement
          account or annuity.  Any such contribution shall be accompanied
          by (1) a statement of the Employe that to the best of his
          knowledge the amount so transferred meets the conditions
          specified in this Section and (2) a copy of such documents as may
          have been received by the Employe advising him of the amount of
          and the character of his distribution.  Notwithstanding the
          foregoing, the Committee shall not accept a rollover contribution
          if in its judgment acceptance of such contribution would cause
          the Plan to violate any provision of the Code or regulations and
          shall not be required to accept such a contribution to the extent
          it consists of property other than cash.

                    4.9  Special Accounting and Investment Rules for
          Rollover Contributions or Direct Trust Transfers:  A rollover
          contribution or direct trust transfer made by or on behalf of an
          Employe pursuant to Sections 4.7 or 4.8 shall be credited, as of
          the Valuation Date coincident with or next following its receipt
          by the Trustee, to a Rollover Account which the Committee shall
          cause to be established and maintained for such Employe as of the
          date such contribution or transfer is delivered to the Trustee. 
          A Participant's Rollover Account shall at all times be fully
          vested in such Participant.  If such Rollover Account is
          established for an Employe who is not a Participant, such Employe
          shall be treated as a Participant for all purposes of the Plan
          except Sections 4.1, 4.2 and 4.3 (relating to contributions by
          and on behalf of Participants).  Subject to the provisions of
          Section 4.10, and notwithstanding any other provision of the Plan
          to the contrary, Rollover Accounts shall be initially invested
          only in Funds A, B, C or E as elected by the Participant in
          accordance with rules prescribed by the Committee.  Thereafter,
          the Employe shall be entitled to change such investment election
          at the time and in the manner specified in Section 5.2.

                    4.10  Special Investment Rules for Qualified Total
          Distributions and Direct Trust Transfers upon Termination of the
          Commonwealth Edison Company Employe Stock Ownership Plan:  If a
          Rollover Account is established pursuant to this Section in



                                         -17-
<PAGE>

          respect of a qualified total distribution under the Code as then
          in effect or a direct trust transfer from the Commonwealth Edison
          Company Employe Stock Ownership Plan (the "ESOP") upon the
          termination of such plan, and the Participant does not make an
          investment election at the time such Rollover Account is
          established, such Account shall be invested in Fund A until such
          Participant shall elect otherwise pursuant to Section 5.2.  


                                      ARTICLE V

                                   Investment Funds

                    5.1  Description of Investment Funds:  There shall be
          the following Investment Funds:

                    (a)  Investment Fund A:  The Unicom Corporation Common
               Stock Fund.  This fund will invest primarily in common stock
               of Unicom Corporation.

                    (b)  Investment Fund B:  Fixed Income Securities Fund. 
               This fund will be invested primarily in high grade debt
               securities with maturities of five years or less from the
               date of purchase.  Such investment may be made directly, or
               indirectly through investment in common, collective or
               pooled investment funds.

                    (c)  Investment Fund C:  Diversified Fund.  This fund
               will be invested primarily in corporate equity securities
               and corporate debt securities.  Investment may also be made
               in other appropriate investments, including but not limited
               to, real estate, foreign securities, and venture capital
               opportunities.  Such investments may be made directly, or
               indirectly through investment in common, collective or
               pooled investment funds.

                    (d)  Investment Fund D:  Stated Return Fund.  This fund
               will be invested primarily in one or more investment
               contracts issued by either (i) an insurance carrier or
               carriers or (ii) a bank or banks or trust company or trust
               companies.

                    (e)  Investment Fund E:  Stock Index Fund.  This fund
               will be invested primarily to perform as closely as possible
               to the Standard and Poor's 500 Stock Price Index.  Such
               investments may be made directly or indirectly through
               investment in common, collective or pooled investment funds. 


                    5.2  Participant's Election of Investment Fund:  Each
          Participant shall file a written election with the Committee
          directing that contributions to his Basic Savings Account and



                                         -18-
<PAGE>

          Compensation Conversion Account be invested in specified
          multiples of 10% in any of Investment Funds A, B, C, D and E. 
          Such election also shall apply to contributions made on or after
          October 1, 1985 to the Participant's Employer Contribution
          Account.  Contributions shall be invested in accordance with such
          election until such election is changed as hereinafter provided.

                    An election under this Section 5.2 may be changed by an
          Active Participant, an Inactive Participant or a Former
          Participant (including a Former Participant who terminated prior
          to July 1, 1989) only as of January 1, April 1, July 1 and
          October 1 by giving the Committee at least 30 days prior written
          notice.  Any change shall direct (i) that the balance of such
          Participant's Account in any of Investment Funds A, B, C, D or E,
          as of the effective date of such change, be transferred in
          multiples of 10% to any other Investment Fund, or (ii) that
          subsequent contributions to the Basic Savings Account,
          Compensation Conversion Account and Employer Contribution Account
          be invested in multiples of 10% in any of Investment Funds A, B,
          C, D and E.  Notwithstanding the foregoing, restrictions may
          apply to investments in Investment Fund D that could preclude
          transfers or changes to or from other Investment Funds.

                    Any election or change in election under this Section
          5.2 shall be made (i) on a form provided or prescribed by the
          Committee and (ii) in accordance with rules of the Committee in
          effect from time to time.  Any election or change in election
          made by a Participant prior to February 1, 1990 shall be treated,
          to the extent possible, as having been made in increments of 10%;
          provided, however, that any such election, whether or not
          convertible to increments of 10%, shall remain in effect until
          such Participant makes a change in his investment election.  


                                      ARTICLE VI

                        Allocations to Participants' Accounts

                    6.1  Individual Accounts:  The Committee shall maintain
          or cause to be maintained individual Accounts, as defined in
          Section 2.1(c), 2.1(j), 2.1(o) and 2.1(dd), of the interests of
          Participants in the Investment Funds, showing separately the
          interests resulting from the deposits of Participants under
          Section 4.1 and from contributions made by the Employer on their
          behalf under Sections 4.2 and 4.3.  Each Investment Fund may,
          however, be invested as a single fund, without segregation of
          Trust Fund assets to the individual Accounts of Participants.

                    6.2  Valuations and Adjustments:  The amount of each
          Participant's Basic Savings Account, Compensation Conversion
          Account, Rollover Account and Employer Contribution Account held




                                         -19-
<PAGE>

          in each Investment Fund shall be adjusted as follows and in the
          following order:

                    (a)  As of the date paid, the amount of any
               distributions or withdrawals from each Account shall be
               debited to the Account and Investment Fund from which paid.

                    (b)  As of the date of transfer, the amount of
               transfers in respect of each Account made to or from each of
               the Investment Funds pursuant to a change in investment
               election shall be debited or credited, as the case may be,
               to the applicable Account and Investment Fund.

                    (c)  As of each Valuation Date, the amounts of each
               Participant's deposits under Section 4.1 and Employer
               contributions under Section 4.2 and 4.3 paid to the Trust
               Fund during the calendar month ending on such Valuation Date
               shall be credited to the Accounts and Investment Funds to
               which allocated.

                    (d)  As soon as practicable after each Valuation Date,
               the Trustee shall determine and shall report to the
               Committee the fair market value of the assets of each
               Investment Fund, excluding therefrom, however, the amount of
               (i) any Forfeitures and (ii) any interest and dividends
               payable on lump sum distributions pursuant to Section 7.5,
               occurring during the then current Plan Year allocable to
               each such Investment Fund ("Current Fair Market Value"). 
               The Current Fair Market Value shall be determined as of such
               Valuation Date or as of the next previous business day if
               such Valuation Date falls on a Saturday or Sunday or a
               holiday.  With respect to each such Investment Fund other
               than Investment Fund D, the Committee shall then determine
               the factor representing the ratio between the Current Fair
               Market Value of such Investment Fund as of the Valuation
               Date and the value of Participants' Accounts invested in
               such Investment Fund as of the next preceding Valuation Date
               plus or minus adjustments made as of the Valuation Date pur-
               suant to Sections 6.2(a), 6.2(b) and 6.2(c).  Each
               Participant's Account balance in each Investment Fund other
               than Investment Fund D shall be multiplied by the factor for
               such Investment Fund so determined by the Committee.  Each
               Participant's Account balance in Investment Fund D shall be
               determined in accordance with the applicable contracts and
               rules established by the Committee.

                    (e)  As of each Valuation Date coincident with the last
               day of a Plan Year, but after adjustments made pursuant to
               Sections 6.2(a) through (d), and Forfeitures determined
               under Section 7.4(d) allocable to the Participant as of such
               Valuation Date shall be credited to the Employer
               Contribution Account of the Participant and allocated to the



                                         -20-
<PAGE>

               Investment Funds pursuant to his election as to con-
               tributions in effect under Section 5.2 as of such Valuation
               Date.

                    (f)  The amount of lump sum distributions and interest
               and dividends payable thereon pursuant to Section 7.5 shall
               be reserved within the Investment Fund from which payment
               thereof is to be made, such reserves to be established as of
               the date such amount is deemed to be paid as a distribution
               under Section 6.2(a).  

                    6.3  Expenses:  All expenses of the Plan and Trust
          attributable to an Investment Fund shall be paid by the Trustee
          from the assets of such Investment Fund.  All expenses of the
          Plan and Trust which are not attributable to any specific
          Investment Fund shall be paid by the Trustee from the assets of
          each Investment Fund, pro rata, based on that proportion of the
          payment which the fair market value of the assets of the
          Investment Fund as of the Valuation Date next preceding the date
          of payment bears to the aggregate fair market value of the assets
          of all Investment Funds as of such date.


                                     ARTICLE VII

                                       Benefits

                    7.1  Amount of Benefits:  The benefit payable to or on
          behalf of a Participant under the provisions of Section 7.2 below
          shall be based on his Account balances determined as of the
          Valuation Date coincident with or next following his termination
          of employment.

                    7.2  Eligibility for Benefits on Termination of
          Employment:

                    (a)  Retirement or Disability:  If a Participant's
               employment with the Employers and Subsidiaries is terminated
               on or after he attains age 65, or if his employment is
               terminated at an earlier age because of Disability or early
               retirement under a qualified defined benefit plan of the
               Employer or Subsidiary in which he is a participant, he
               shall be entitled to receive his Account balance in his
               Basic Savings Account, his Compensation Conversion Account,
               his Rollover Account and his Employer Contribution Account,
               in accordance with Section 7.5.

                    (b)  Death:  In the event that the termination of
               employment of a Participant is caused by his death, the
               Account balance in his Basic Savings Account, his
               Compensation Conversion Account, his Rollover Account and
               his Employer Contribution Account shall be paid to his



                                         -21-
<PAGE>

               Beneficiary in accordance with Section 7.5 after receipt by
               the Committee of acceptable proof of death.

                    (c)  Termination for Other Reasons:  If a Participant's
               employment with the Employers and Subsidiaries is terminated
               before age 65 for any reason other than death, Disability or
               early retirement as provided for in Section 7.2(a), the
               Participant shall be entitled to the Account balance in his
               Basic Savings Account, his Rollover Account and his
               Compensation Conversion Account plus an amount equal to the
               portion of his Employer Contribution Account balance which
               is vested as of the date of his termination of employment in
               accordance with Section 7.4(c)(i) and (e).  Payment of
               benefits due under this subsection (c) shall be in
               accordance with Section 7.5.  For purposes of this Section
               7.2(c), termination with an Employer followed by immediate
               or continued employment with an Employer or Subsidiary shall
               not be deemed a termination of employment.

                    (d)  Sale of Subsidiary:  In the event of the sale of a
               Subsidiary which is an Employer and (i) a Participant
               continues employment with such Subsidiary after the sale but
               (ii) such Subsidiary ceases to be an Employer as of the date
               of the sale, the Participant shall be deemed for purposes of
               the Plan to have terminated his employment with the
               Employers and Subsidiaries as of the date of the sale.

                    7.3  Account Withdrawals:  A Participant shall have the
          right to withdraw amounts from his Basic Savings Account and his
          Compensation Conversion Account in accordance with the following:

                    (a)  The Participant shall file a written request with
               the Committee setting forth the amount he wishes to withdraw
               and the Account(s) and Investment Fund(s) from which it is
               to be withdrawn.  Only one withdrawal may be made during a
               calendar year from the Participant's Basic Savings Account.

                    (b)  A Participant may withdraw up to an amount equal
               to the balance in his Basic Savings Account, as of the
               applicable Valuation Date set forth in Section 7.3(g),
               except that while any loan to the Participant under Section
               7.8 remains outstanding, the amount available for withdrawal
               shall be the balance in such Account less twice the balance
               of any loan subaccount established for the Participant
               pursuant to Section 7.8(b) attributable to investment from
               the Participant's Basic Savings Account.

                    (c)  A Participant may withdraw up to an amount equal
               to the balance in his Compensation Conversion Account, plus
               the balance of his Recharacterization Account, as of the
               applicable Valuation Date set forth in Section 7.3(g),
               except that (i) while any loan to the Participant under



                                         -22-
<PAGE>

               Section 7.7 remains outstanding, the amount available for
               withdrawal shall be the balance in such Accounts less twice
               the balance of any loan subaccount established for the
               Participant pursuant to Section 7.7(b) attributable to
               investment from the Participant's Compensation Conversion
               Account and (ii) no amount attributable to earnings accrued
               after December 31, 1988 in respect of contributions
               allocated to such accounts shall be available for withdrawal
               if the withdrawal is made prior to attaining age 59-1/2.  Such
               withdrawal may only be made if the Participant has attained
               age 59-1/2 or on account of the Participant's hardship. 
               Such a withdrawal shall be deemed to be on account of the
               Participant's hardship if the withdrawal is necessary in
               light of immediate and heavy financial needs of the
               Participant.  A withdrawal based on financial hardship
               cannot exceed the amount required to meet the immediate
               financial need created by the hardship and not reasonably
               available from other resources of the Participant.  The
               determination of the existence of financial hardship and the
               amount required to be distributed to meet the need created
               by the hardship will be made by the Committee, and its
               decisions shall be applied in a uniform and
               nondiscriminatory manner according to the following rules:

                         (i)  A financial hardship shall be deemed to exist
                    if the Participant certifies to the Committee that the
                    financial need is on account of:

                              (A)  expenses for medical care described in
                         section 213(d) of the Code previously incurred by
                         the Participant, the Participant's spouse or any
                         dependents of the Participant (as defined in
                         Section 152 of the Code) or necessary for these
                         persons to obtain medical care as described in
                         Section 213(d) of the Code;

                              (B)  the purchase (excluding mortgage
                         payments) of a principal residence of the
                         Participant;

                              (C)  the payment of tuition and related
                         educational fees for the next 12 months of post-
                         secondary education for the Participant, the
                         Participant's spouse, children, or dependents (as
                         defined in Section 152 of the Code);

                              (D)  the need to prevent the eviction of the
                         Participant from his principal residence or
                         foreclosure of the Participant's principal
                         residence.





                                         -23-
<PAGE>

                         (ii)   A Participant shall be required to certify
                    to the Committee on a form prescribed by the Committee
                    both the reason for the financial need and that such
                    need cannot be satisfied from sources other than a
                    withdrawal from the Participant's Compensation Conver-
                    sion Account.  The Participant shall be required to
                    submit any additional supporting documentation as may
                    be requested by the Committee.

                         (iii)  A distribution shall be treated as
                    necessary to satisfy a financial need if the
                    Participant certifies to the Committee (and if the
                    Committee has no reason to believe that such
                    certification is inaccurate) that such distribution
                    cannot be relieved by or through:

                              (A)  reimbursement or compensation by
                         insurance or otherwise;

                              (B)  reasonable liquidation of the
                         Participant's assets (including for this purpose
                         assets of the Participant's spouse and minor
                         children that are reasonably available to the
                         Participant), to the extent such liquidation would
                         not itself cause an immediate and heavy financial
                         need;

                              (C)  cessation of contributions to the
                         Participant's Basic Savings or Compensation
                         Conversion Accounts; or

                              (D)  other distributions or nontaxable (at
                         the time of the loan) loans from plans maintained
                         by an Employer or by another employer, or by
                         borrowing from commercial sources on reasonable
                         commercial terms.

                    (d)  A participant may withdraw up to an amount equal
               to the balance in his Rollover Account as of the applicable
               Valuation Date set forth in Section 7.3(g) except that while
               any loan to the Participant under Section 7.7 remains
               outstanding, the amount available for withdrawal shall be
               the balance in such Account less twice the balance of any
               loan subaccount established for the Participant pursuant to
               Section 7.7(b) attributable to investment from the
               Participant's Rollover Account.

                    (e)  A Participant who makes a withdrawal pursuant to
               Section 7.3(b) or Section 7.3(c) (to the extent the
               Participant has not attained age 59-1/2) shall be precluded
               from having deposits made to his Basic Savings Account under
               Section 4.1 or reduction in Compensation under Section 4.2



                                         -24-
<PAGE>

               for a period of six months after the date as of which
               withdrawal is made.  After the expiration of such six-month
               period, the Participant again may elect to actively
               participate in the Plan pursuant to Section 3.2.

                    (f)  Payment of any withdrawals will be made in cash in
               a lump sum to the Participant as soon as practicable.

                    (g)  For purposes of this Section, the applicable
               Valuation Date shall be (i) in the case of a request
               received by the Committee during the first 15 days of a
               calendar month, the second preceding Valuation Date, and
               (ii) in the case of a request received by the Committee
               after the 15th day of a calendar month, the immediately
               preceding Valuation Date.


                    7.4  Vesting and Forfeiture of Accounts:

                    (a)  Basic Savings Account:  A Participant's Basic
               Savings Account shall at all times be fully vested in such
               Participant.

                    (b)  Compensation Conversion Account:  A Participant's
               Compensation Conversion Account shall at all times be fully
               vested in such Participant.

                    (c)  Employer Contribution Account:

                         (i)  Except as provided in (ii) below, and
                    provided that the Employe remains in the employment of
                    an Employer or a Subsidiary, he shall become:  20%
                    vested in his Employer Contribution Account balance as
                    of the January 1st next following the date he first
                    becomes an Active Participant pursuant to Section 3.2
                    hereof; 40% vested in such Account balance as of the
                    January 1st next following the first anniversary of the
                    date he first becomes an Active Participant; 60% vested
                    in such Account balance as of the January 1st next
                    following the second anniversary of the date he first
                    becomes an Active Participant; 80% vested in such
                    Account balance as of the January 1st next following
                    the third anniversary of the date he first becomes an
                    Active Participant; and 100% vested in such Account
                    balance as of and after the January 1st next following
                    the fourth anniversary of the date he first becomes an
                    Active Participant.  For purposes of this Section
                    7.4(c), an Employe shall be deemed to remain in the
                    employment of an Employer or a Subsidiary until his
                    employment with the Employers and Subsidiaries is
                    terminated; if an Employe's employment is terminated
                    and he is employed by an Employer or a Subsidiary



                                         -25-
<PAGE>

                    within one year thereafter, he shall not be deemed to
                    have incurred a termination of employment.  Notwith-
                    standing the foregoing provisions of this subsection
                    (i), as of the date of the sale by the Company of its
                    interest in Chicago & Illinois Midland Railway Company,
                    each Participant who as of such date is an employe of
                    Chicago & Illinois Midland Railway Company shall at
                    that time be fully vested in his Employer Contribution
                    Account.

                         (ii)  Upon a Participant's entitlement to benefits
                    in accordance with Sections 7.2(a) or 7.2(b) above,
                    such Participant shall at that time be fully vested in
                    his Employer Contribution Account.

                    (d)  Forfeiture:  Upon a Participant's termination of
               employment in accordance with Section 7.2(c), the nonvested
               amount of his Employer Contribution Account shall be
               segregated from such Account and shall continue to be
               invested in accordance with the Participant's investment
               election under Section 5.2 in effect at his termination of
               employment until December 31 of the year in which the
               Participant's termination of employment occurs.  As of
               December 31 of such year, such nonvested amount shall be
               invested in Fund D until such nonvested amount either shall
               be again credited to the Participant's Account pursuant to
               Section 7.4(e) or reallocated among Participant's Accounts
               pursuant to the fourth sentence of this Section 7.4(d).  If
               such Participant is not rehired by an Employer or Subsidiary
               within five years of the date on which he terminated his
               employment, the portion so segregated from his Employer
               Contribution Account shall become a Forfeiture at the end of
               the five-year period; except that this sentence shall not be
               applicable in respect of any portion so segregated that
               became a Forfeiture prior to January 1, 1985 under the terms
               of the Plan as then in effect and provided further that if a
               Participant is absent from work with the Employer or
               Subsidiary by reason of a leave of absence, beginning on or
               after January 1, 1985, due to (i) pregnancy of the
               Participant, (ii) birth of a child of the Participant, (iii)
               placement of a child with the Participant in connection with
               the adoption of such child by the Participant or (iv) caring
               for such child for a period immediately following such birth
               or placement, and such leave of absence ends with the
               termination of the Participant's employment and such
               termination of employment occurs between the first and
               second anniversary of the first day of such leave of
               absence, then for purposes of this sentence the five-year
               period shall begin on the second anniversary of the first
               day of such leave of absence rather than on the date of
               termination of employment.  The aggregate amount of Partici-
               pants' Forfeitures occurring during a Plan Year shall be



                                         -26-
<PAGE>

               attributed to the Employer of the Participants who have
               forfeited and, as of the Valuation Date coincident with the
               last day of such Plan Year, shall be allocated per capita
               among Active Participants and Inactive Participants who are
               Employes of such Employer and credited to each such
               Participant's Employer Contribution Account in accordance
               with Section 6.2(e).  Notwithstanding the foregoing
               sentence, the aggregate amount of Participant's Forfeitures
               occurring during a Plan Year beginning on or after
               January 1, 1988 which are attributable to Participants who
               are Employes of Chicago & Illinois Midland Railway Company
               shall be allocated, as of the Valuation Date coincident with
               the last day of such Plan Year, per capita among Active
               Participants and Inactive Participants who are Employes of
               the Employers and credited to each such Participant's
               Employer Contributions Account in accordance with Section
               6.2(a).

                    (e)  Re-employment:  If a Participant is re-employed by
               an Employer after he incurs a Forfeiture, his pre-
               termination vesting percentage shall be taken into account
               in determining his rights after his re-entry into the Plan,
               but his period of employment after his re-employment shall
               not be taken into account for purposes of determining the
               vested percentage of his Employer Contribution Account
               existing before his termination.

                    If a Participant who has terminated before becoming
          100% vested in his Employer Contribution Account is re-employed
          by an Employer or Subsidiary before he incurs a Forfeiture, his
          Employer Contribution Account shall be re-established in an
          amount equal to the balance of the segregated portion of his
          Account, as provided in Section 7.4(d), as of the date of his re-
          employment and his vesting percentage shall remain unchanged;
          provided, however, that if the Participant again terminates his
          employment before becoming 100% vested in his Employer
          Contribution Account, the balance of his Employer Contribution
          Account to which he is then entitled under the Plan shall be
          equal to:  the amount obtained by (i) multiplying the sum of (A)
          the balance of such Account as of the Valuation Date coincident
          with or next following his termination date and (B) the amounts
          previously paid to him from such Account by his vested percentage
          determined under Section 7.4(c)(i), and (ii) subtracting from the
          product determined under (i) the amounts previously paid to him
          from such Account.

                    For purposes of the preceding paragraphs of this
          Section 7.4(e), a Participant's pre-termination vesting per-
          centage shall increase in accordance with the provisions of
          Section 7.4(c)(i) for his period of employment after his re-
          employment based on his date of re-employment and anniversaries
          thereof; provided, however, that in no event shall a re-employed



                                         -27-
<PAGE>

          Participant receive less than an additional 20% vesting
          percentage under Section 7.4(c)(i) for his period of employment
          after his re-employment if the number of days during which he was
          an employe of the Employers and Subsidiaries in the Plan Year in
          which he first terminated his employment plus the number of days
          during which he was an employe of the Employers and Subsidiaries
          in the Plan Year in which he terminates his employment after his
          re-employment exceeds 365 days.

                    7.5  Payment of Benefits:  Upon a Participant's
          entitlement to payment of benefits under Section 7.2, he, or in
          the event of his death his Beneficiary, shall file with the
          Committee such form or forms as the Committee shall provide.

                    Distribution to a Participant shall be made in any one
          of the following methods as elected by the Participant:

                    (a)  In a lump sum, or

                    (b)  Except as hereinafter provided, in periodic
               payments of substantially equal amounts for a specified
               number of years not in excess of the lesser of 15 or the
               life expectancy of the Participant or Beneficiary, as the
               case may be, commencing on the Valuation Date coincident
               with or next following the Participant's termination of
               employment, and each subsequent payment shall be made on
               each subsequent anniversary thereof; provided, however, if
               periodic payments have begun to be paid to the Participant
               and he dies before all such payments have been made, then
               the unpaid balance of the Participant's Account shall be
               paid to his Beneficiary at least as rapidly as, and over a
               period not to exceed the number of years remaining in the
               period over which the periodic payments were being paid to
               the Participant.  Periodic payments shall be made not less
               frequently than annually and shall include net income or
               losses allocable to the Participant for each year.
               Notwithstanding the foregoing, distribution shall not be
               made in periodic payments of (i) a Rollover Account
               established pursuant to Section 4.10 on behalf of a
               Participant in the ESOP who elected not to receive a
               distribution of his ESOP account until his 65th birthday and
               (ii) a Participant's Account if his Account balance does not
               exceed $3,500 on the Valuation Date coincident with or next
               following the Participant's termination of employment.

                    A Participant (including a Former Participant who
          terminated prior to July 1, 1989) who has elected distribution in
          periodic payments pursuant to subsection (b) above may, at any
          time after such election is made, elect to receive a distribution
          of the remaining amount of his benefit in a lump sum.  





                                         -28-
<PAGE>

                    Except as hereinafter provided, payment of a
          Participant's benefits must be made or commence within 60 days
          following the Valuation Date coincident with or next following
          the Participant's termination of employment (which shall begin
          not earlier than the end of the period for which a participant
          receives any salary continuation or severance allowance under a
          severance arrangement of an Employer).  If on the Valuation Date
          coincident with or next following the Participant's termination
          of employment the value of his Account balance exceeds $3,500 and
          he has not attained age 65, distribution will be deferred until
          he attains age 65 and will be made or commence within 60 days
          following the Valuation Date coincident with or next following
          the date on which he attains age 65.  A Participant who does not
          wish to have distribution of his Account balance made or commence
          at the time provided in the preceding sentence may elect prior to
          his termination of employment to have his benefits distributed in
          accordance with the first sentence of this paragraph or deferred
          as provided in the next paragraph.  If a Participant's
          distribution is deferred until he attains age 65, his then
          distributable Account balance shall be determined as of the
          Valuation Date coincident with or next following the date on
          which he attains age 65.

                    Notwithstanding the provisions of the preceding
          paragraph, a Participant may elect, prior to his termination of
          employment, provided his Account balance to be distributed
          exceeds $3,500, to defer distribution and to have payment of his
          benefits made or commence within 60 days following the end of the
          Plan Year in which he attains age 70-1/2.  The election provided
          in the preceding sentence may also be made by any Participant who
          terminated employment on or after January 1, 1992, who has an
          Account balance in excess of $3,500 and who has not received or
          begun to receive distribution of his Account balance pursuant to
          the provisions of this Section 7.5, provided that, such election
          is made on or before September 1, 1992 and prior to the date his
          Account balance becomes payable.  If a Participant's distribution
          is deferred until he attains age 70-1/2, his Account balance then
          distributable shall be determined as of the Valuation Date
          coincident with the last day of the calendar year in which the
          Participant attains age 70-1/2.

                    If a distribution is deferred under this Section 7.5 to
          age 65 or age 70-1/2, a Participant subsequently may elect at any
          time to terminate such deferral and have distribution of his
          benefit made or commence within 60 days after such termination
          election is made.  In the event an election is made to terminate
          deferral, the Participant's distributable Account balance shall
          be determined as of the Valuation Date coincident with or next
          following the date on which such election is made.

                    If distribution is deferred under this Section 7.5 and
          the Participant dies prior to distribution, distribution shall be



                                         -29-
<PAGE>
      
          paid to his Beneficiary in the manner directed by the Participant
          on a Beneficiary designation form effective under the Plan or as
          otherwise provided under Section 7.6 if the manner in which his
          Account balance is to be paid is not designated.  Such
          distribution shall be made or commence not later than 60 days
          following the end of the Plan Year in which the Participant's
          death occurs.

                    In the case of a distribution of a lump sum payment
          pursuant to the provisions of this Section, interest on the
          amount of such lump sum payment (other than the portion, if any,
          of the distribution that consists of shares of Unicom Corporation
          common stock) shall be paid to the recipient thereof by the Fund
          or Funds from which such distribution is made for the period from
          the Valuation Date on which the amount of such lump sum
          distribution is determined to and including the day preceding the
          date on which such distribution is made.  Interest for such
          period shall be calculated at the Tier 1 rate payable by the
          First National Bank of Chicago on its First Money Market Account
          for the week within which occurs the Valuation Date on which the
          amount of the distribution is determined.  Such interest shall be
          paid within fifteen days after the date on which distribution of
          the lump sum payment is made.  To the extent a distribution
          consists of shares of Unicom Corporation common stock, any
          declared dividends having a record date after the Valuation Date
          on which the number of shares is determined and prior to the date
          of distribution of the shares shall be paid to the Participant as
          soon as possible after the dividends are received by the Trustee.

                    Notwithstanding any other provision of the Plan to the
          contrary, effective January 1, 1989, if a Participant, other than
          a Participant who had attained age 70-1/2 before January 1, 1988,
          has not terminated his employment with the Employers and
          Subsidiaries before the Plan Year in which he attains age 70-1/2,
          payment of benefits shall be made to him (or commenced to the
          Participant in accordance with applicable regulations over a
          period not extending beyond the life expectancy of the
          Participant or the life expectancies of the Participant and his
          designated Beneficiary) or, in the event of his death, to his
          Beneficiary, not later than the April l following the last day of
          the Plan Year in which the Participant attains age 70-1/2.

                    The amount which a Participant or Beneficiary is
          entitled to receive at any time and from time to time shall be
          paid in cash, except that if the Participant's Account is to be
          paid in a lump sum, then the Participant may request that all of
          his Account invested in Investment Fund A be distributed in whole
          shares of Unicom Corporation common stock with any fractional
          share being paid in cash.  The number of shares of Unicom
          Corporation common stock to be distributed shall be based on the
          current fair market value of a share of the Unicom Corporation's
          common stock as determined by the Trustee under Section 6.2(d)



                                         -30-
<PAGE>

          either (i) as of the Valuation Date coincident with or next
          following the Participant's termination of employment for
          purposes of Section 7.2 or (ii) in the event of a deferral of
          payment made pursuant to the fourth paragraph of this Section
          7.5, as of the Valuation Date applicable hereto.  Requests for
          distribution in the form of Unicom Corporation common stock shall
          be made at such time and in such manner as the Committee shall
          determine under rules and regulations which are uniformly
          applied.

                    Notwithstanding anything herein to the contrary, in the
          case of a distribution from the Plan (excluding any amount offset
          against the Participant's Account balance to repay the
          outstanding balance of any unpaid loan) which is an eligible
          rollover distribution within the meaning of Section 402 of the
          Code and which is paid after December 31, 1992, a Participant (or
          surviving spouse of a Participant) may elect that all or any
          portion of such distribution to which he is entitled which equals
          at least $200 shall be directly transferred as a rollover
          contribution from the Plan to one of the following:  (i) an
          individual retirement account described in Section 408(a) of the
          Code, (ii) an individual retirement annuity described in Section
          408(b) of the Code, (iii) an annuity plan described in Section
          403(a) of the Code, or (iv) another plan qualified under Section
          401(a) of the Code (provided, however, that a surviving spouse of
          a Participant may only elect to have such distribution
          transferred directly to an individual retirement account or
          individual retirement annuity).  Notwithstanding the foregoing, a
          Participant (or his surviving spouse) shall not be entitled to
          elect to have a portion which equals less than the total amount
          of such distribution transferred as a rollover contribution as
          described in the preceding sentence unless such portion equals at
          least $500.  If a distribution is one to which Sections
          401(a)(11) and 417 of the Code do not apply, such distribution
          may commence less than 30 days after the notice required under
          Section 1.411(a)-11(c) of the regulations is given, provided
          that:

                    (a)  the Committee clearly informs the Participant that
               the Participant has a right to a period of at least 30 days
               after receiving the notice to consider the decision of
               whether or not to elect a distribution (and, if applicable,
               a particular distribution option), and

                    (b)  the Participant, after receiving the notice,
               affirmatively elects a distribution.

                    7.6  Designation of Beneficiary:  Each Participant from
          time to time may designate any person or persons (who may be
          designated contingently or successively and who may be an entity
          other than a natural person) as the Beneficiary or Beneficiaries
          to whom his Account balance shall be paid should he die before



                                         -31-
<PAGE>

          receipt thereof; provided, however, that effective January 1,
          1985 if a Participant who terminates employment on or after
          August 23, 1984 is married at the time of his death and the
          person so designated is not his surviving spouse, such
          designation will not be effective under the Plan unless the
          requirements of the last paragraph of this Section 7.6 have been
          met in respect of such designation.  Each Participant also may
          designate in such Beneficiary designation the manner in which his
          Account balance shall be paid to his Beneficiary or Beneficiaries
          in accordance with Section 7.5.  Each Beneficiary designation
          shall be in a form prescribed by the Committee and shall be
          effective only when filed with the Committee during the
          Participant's lifetime.  Each Beneficiary designation filed with
          the Committee and effective under the Plan shall cancel all
          Beneficiary designations previously filed with the Committee. 
          The revocation of a Beneficiary designation shall not require the
          consent of any designated Beneficiary.

                    If there is no Beneficiary designation that is
          effective under the Plan, or if the Beneficiary designated by a
          deceased Participant pursuant to an effective designation dies
          before him or before complete distribution of the Participant's
          Account balance, the Committee shall direct the Trustee to
          distribute such Participant's benefits (or the balance thereof)
          to the surviving spouse of the Participant or, if the Participant
          has no spouse living at the time of his death, to the estate of
          the last to die of such Participant and his designated
          Beneficiary or Beneficiaries.

                    If any Participant fails to designate on a Beneficiary
          designation effective under the Plan the manner in which his
          Account balance shall be paid to his Beneficiary or
          Beneficiaries, it shall be paid in such manner as such
          Beneficiary or Beneficiaries shall request.  If any Beneficiary
          shall request payment in accordance with Section 7.5(b), such
          Beneficiary shall file a written investment election in
          accordance with Section 5.2.

                    For purposes of the proviso of the first sentence of
          this Section 7.6, a Beneficiary designation naming a Beneficiary
          who is not the Participant's surviving spouse shall be effective
          only if the Participant's surviving spouse consents to such
          designation and the surviving spouse's signature on such consent
          is witnessed by a Plan representative or a notary public. 
          Notwithstanding the foregoing sentence, such consent of the
          surviving spouse shall not be required if the Participant
          establishes to the satisfaction of the Committee that the spouse
          cannot be located.







                                         -32-
<PAGE>

                    7.7  Loans:

                    (a)  Authority to Make Loans; Restrictions:  Each
          Permissible Borrower shall have the right to borrow amounts from
          his Accounts in accordance with the following and with any
          additional requirements established by the Committee and
          uniformly applied:

                    (1)  The Permissible Borrower shall file a written loan
               application with the Committee on a form provided by the
               Committee for such purpose, together with the required
               application fee.  If the Permissible Borrower is a
               Participant and is married at the time he applies for a
               loan, such loan application shall be consented to in writing
               by such Permissible Borrower's spouse in the same manner as
               provided in Section 7.6 (relating to the designation of
               beneficiaries).  Only one loan is permitted to a Permissible
               Borrower in any calendar year and the aggregate number of
               loans to a Permissible Borrower which may be outstanding at
               any time may not exceed 5.  A loan acceptance fee may be
               required by the Committee on each loan in addition to the
               required application fee.  

                    (2)  The amount of a loan shall not be less than
               $1,000, and the aggregate amount of all outstanding loans to
               a Permissible Borrower shall not exceed the lesser of (a)
               50% of the Permissible Borrower's interest in his or her
               Accounts as of the applicable Valuation Date and (b)
               $50,000, decreased by the excess of (i) the highest
               outstanding balance of all loans from the Plan to the
               Permissible Borrower during the 12-month period ending on
               the day before the day such loan is made to the Permissible
               Borrower, over (ii) the outstanding balance of all loans
               from the Plan to the Permissible Borrower on the day such
               loan is made to the Permissible Borrower.  For purposes of
               the preceding sentence the applicable Valuation Date shall
               be (a) in the case of a loan application received by the
               Committee during the first 15 days of a calendar month, the
               second preceding Valuation Date, and (b) in the case of a
               loan application received by the Committee after the 15th
               day of a calendar month, the immediately preceding Valuation
               Date.

                    (3)  The period for repayment of a loan shall be
               arrived at by mutual agreement between the Committee and the
               Permissible Borrower, but such period shall not exceed five
               years from the date on which the loan is made.  A loan may
               be prepaid, without penalty, after twelve months from the
               date the loan is made by delivery to the Committee of cash
               in an amount equal to the entire unpaid balance of such
               loan.  No partial prepayment shall be permitted.




                                         -33-
<PAGE>

                    (4)  No loan shall be made to a Permissible Borrower
               who is an Employe unless such Permissible Borrower consents
               to have substantially equal installment payments deducted
               from the Permissible Borrower's regular payroll checks
               during the term of the loan.

                    (5)  Each loan shall be evidenced by the Permissible
               Borrower's collateral promissory note, in the form
               prescribed by the Committee, for the amount of the loan,
               with interest, payable to the order of the Trustee, and
               shall be secured by an assignment to the Trustee of the
               Permissible Borrower's entire right, title and interest in
               and to his Accounts.

                    (6)  Each loan shall bear interest at the rate
               established by The First National Bank of Chicago for loans
               secured by certificates of deposit and in effect on the last
               business day of the month preceding the issuance of the
               loan. 

                    (7)  Failure to pay principal or interest when due
               shall result in default and foreclosure proceedings shall be
               instituted in accordance with procedures established by the
               Committee and in effect from time to time.  

                    (8)  If a Permissible Borrower terminates employment,
               the outstanding balance of all loans made to such
               Permissible Borrower shall become immediately due and
               payable; provided, however, that this provision shall not
               apply to any Permissible Borrower who qualifies as a
               Permissible Borrower under Section 7.7(c)(ii) below.  No
               distribution, and no withdrawal from a Participant's
               Accounts, including a rollover account, shall be made or
               permitted to any Permissible Borrower who has borrowed from
               the fund or to a Beneficiary of any such Permissible
               Borrower, unless and until the loan, including interest, has
               been repaid out of the funds otherwise distributable.

                    (9)  Each loan applied for by a Permissible Borrower in
               accordance with the requirements of this Section shall be
               granted, and disbursement of such loan shall be made, as
               soon as practicable after all the necessary documentation
               has been executed by the Permissible Borrower and delivered
               to the Committee.

                    (10)  No loan shall be made if it would cause the
               Plan to be in violation of any provision of law,
               including any applicable government regulations.

                    (b)  Loan Subaccount:  The Trustee shall establish and
          maintain a loan subaccount on behalf of each Permissible Borrower
          to whom a loan is made under this Section.  Such subaccount shall



                                         -34-
<PAGE>
          
          represent the investment of the Permissible Borrower's Account in
          such loan.  As of the Valuation Date immediately preceding the
          date on which a loan is approved, the Permissible Borrower's loan
          subaccount shall be credited with the amount of the loan and
          thereafter shall be debited with repayments of the principal of
          such loan.  The various Accounts maintained for the Permissible
          Borrower shall be invested in the loan subaccount and debited by
          the amount of the loan and credited with payments of interest on,
          and repayments of principal of, such loan in accordance with
          uniform rules established by the Committee.

                    (c)  Permissible Borrower:  For purposes of this
          Section 7.7, a Permissible Borrower shall mean (i) a Participant
          who is an Employe and (ii) each other Participant or Beneficiary
          who is a "party in interest" with respect to the Plan under
          Section 3(14) of ERISA.  


                                     ARTICLE VIII

                                      Trust Fund

                    8.1  Trust Fund:  All contributions under the Plan
          shall be paid to the Trustee and deposited in the Trust Fund.  
          Except as otherwise provided in this Section 8.1, all assets of
          the Trust Fund, including investment income, shall be retained
          for the exclusive benefit of Participants and their
          Beneficiaries, shall be used to pay benefits to such persons or
          to pay expenses of the Plan and Trust, and shall not revert to or
          inure to the benefit of the Employers.

                    Notwithstanding any provision of the Plan to the
          contrary, contributions made by an Employer may be returned to
          the Employer if the Employer certifies that such return is in
          compliance with Section 403(c) of ERISA.


                                      ARTICLE IX

                                    Administration

                    9.1  Allocation of Responsibility among Fiduciaries for
          Plan and Trust Administration:  In general, the Company shall be
          the "administrator" of the Plan for purposes of ERISA, and shall
          have the sole authority to appoint and remove the Trustee,
          members of the Committee, and any investment manager which may be
          provided for under the Trust and to delegate fiduciary
          responsibilities in addition to any delegation provided herein,
          and to amend or terminate, in whole or in part, this Plan or the
          Trust.  The Committee, the members of which shall be "named
          fiduciaries" under ERISA, shall have the responsibility for the
          day-to-day administration of this Plan, which responsibility is



                                         -35-
<PAGE>

          specifically described in this Plan.  The Trustee shall have the
          responsibility for the administration and management of the Trust
          Fund, as specifically described in the Trust.  The Employers
          shall be "named fiduciaries" under ERISA and shall have the
          responsibility for making the contributions specified in Sections
          4.2 and 4.3.  Furthermore, each fiduciary may rely upon any
          direction, information or action of another fiduciary as being
          proper under this Plan.  It is intended that each fiduciary shall
          be responsible for the proper exercise of its own powers, duties,
          responsibilities and obligations under this Plan and shall not be
          responsible for any act or failure to act of another fiduciary. 
          No fiduciary guarantees the Trust Fund in any manner against
          investment loss or depreciation in asset value.

                    9.2  Appointment of the Committee:  A Committee
          consisting of at least three persons shall be appointed by and
          serve at the pleasure of the Board.  All usual and reasonable
          expenses of the Committee shall be paid out of the Trust Fund as
          provided in Section 6.3.  Members of the Committee who are
          employes of an Employer or Subsidiary shall not receive
          compensation with respect to their services for the Committee. 
          The Company shall notify the Trustee of the members of the
          Committee and any changes in membership which may take place from
          time to time.

                    9.3  Claims Procedure:  The Committee shall make all
          determinations as to the right of any person to a benefit.  Any
          denial by the Committee of a claim for benefits under the Plan by
          a Participant or Beneficiary shall be stated in writing by the
          Committee and delivered or mailed to the Participant or
          Beneficiary and such notice shall set forth the specific reasons
          for the denial, written to the best of the Committee's ability in
          a manner that may be understood without legal or actuarial
          counsel.  In addition, the Committee shall afford a reasonable
          opportunity to any Participant or Beneficiary whose claim for
          benefits has been denied, to appeal to the chairman of the
          Committee for a review of the decision denying the claim.  To the
          extent that any portion of the benefits of a Participant or
          Beneficiary under the Plan are not in dispute, payment of the
          undisputed portion shall be made without regard to any disputed
          benefits.

                    9.4  Records and Reports:  The Company shall exercise
          such authority and responsibility as it deems appropriate in
          order to comply with ERISA and governmental regulations issued
          thereunder relating to records of Participants' Account balances
          and the percentage of such Account balances which is
          nonforfeitable under the Plan, notification to Participants,
          annual registration with the Internal Revenue Service, and annual
          reports to the Department of Labor.  Each Employer shall provide
          the Company or the Committee with such information as they may
          require to administer the Plan.



                                         -36-
<PAGE>

                    9.5  Other Committee Powers and Duties:  The Committee
          shall have such duties and powers as may be necessary to
          discharge its duties hereunder, including, but not by way of
          limitation, the following:

                    (a)  to construe and interpret the Plan, decide all
               questions of eligibility and determine the amount, manner
               and time of payment of any benefits hereunder;

                    (b)  to prescribe procedures to be followed by
               Participants or Beneficiaries filing applications for
               benefits;

                    (c)  to prepare and distribute, in such manner as the
               Committee determines to be appropriate, information
               explaining the Plan;

                    (d)  to receive from the Employers and Participants
               such information as shall be necessary for the proper
               administration of the Plan;

                    (e)  to furnish the Employers, upon request, with such
               annual reports with respect to the administration of the
               Plan as are reasonable and appropriate;

                    (f)  to receive, review and keep in file (as it deems
               convenient or proper) reports of the financial condition,
               and the receipts and disbursements, of the Trust Fund;

                    (g)  to allocate the responsibilities of the Committee
               among themselves; 

                    (h)  to appoint or employ individuals to assist in the
               administration of the Plan and other agents it deems
               advisable, including legal and actuarial counsel.

                    The Committee shall have no power to add to, subtract
          from, or modify any of the terms of the Plan, or to change or add
          to any benefits provided by the Plan, or to waive or fail to
          apply any requirements of eligibility for a benefit under the
          Plan.

                    9.6  Rules and Decisions:  The Committee may adopt such
          rules and actuarial tables as it deems necessary, desirable or
          appropriate.  All rules and decisions of the Committee shall be
          uniformly and consistently applied to all Participants in similar
          circumstances.  When making a determination or calculation, the
          Committee shall be entitled to rely upon information furnished by
          a Participant or Beneficiary, the Employers, the legal counsel of
          the Employers, or the Trustee.




                                         -37-
<PAGE>
      
                    9.7  Committee Procedures:  The Committee may act at a
          meeting or in writing without a meeting.  The Committee shall
          elect one of its members as chairman and appoint a secretary, who
          may or may not be a Committee member.  The secretary shall keep a
          record of all meetings and forward all necessary communications
          to the Employers or the Trustee.  The Committee may adopt such
          by-laws and regulations as it deems desirable for the conduct of
          its affairs.  All decisions of the Committee shall be made by the
          vote of the majority, including actions in writing taken without
          a meeting.

                    9.8  Authorization of Benefit Payments:  The Committee
          shall issue directions to the Trustee concerning all benefits
          which are to be paid from the Trust Fund pursuant to the
          provisions of the Plan, and warrants that all such directions are
          in accordance with this Plan.

                    9.9  Application and Forms for Benefits:  The Committee
          may require a Participant or Beneficiary to complete and file
          with the Committee an application for a benefit and all other
          forms approved by the Committee, and to furnish all pertinent
          information requested by the Committee.  The Committee may rely
          upon all such information so furnished it, including the
          Participant's or Beneficiary's current mailing address.

                    9.10  Facility of Payment:  Whenever, in the
          Committee's opinion, a person entitled to receive any payment of
          a benefit or installment thereof hereunder is under a legal
          disability or is incapacitated in any way so as to be unable to
          manage his financial affairs, the Committee may direct the
          payment to be made to such person or to his legal representative
          or to a relative or friend of such person for his benefit, or the
          Committee may direct that the payment be applied for the benefit
          of such person in such manner as the Committee considers
          advisable.  Any payment of a benefit or installment thereof in
          accordance with the provisions of this Section shall be a
          complete discharge of any liability for the making of such
          payment under the provisions of the Plan.

                    9.11  Voting of Unicom Corporation Common Stock Held by
          Trustee:  The Committee will deliver or cause to be delivered, at
          least 30 days prior to each meeting of shareowners, to each
          Participant who has an investment in Investment Fund A, or in the
          event of his death to his Beneficiary, all reports, financial
          statements, proxies and proxy soliciting material which are
          delivered to owners of Unicom Corporation common stock in
          connection with such meeting.  Such Participant or Beneficiary
          shall have the right to direct the Trustee as to the exercise of
          all voting rights with respect to his proportional interest,
          determined as of the Valuation Date next preceding such meeting,
          in Unicom Corporation common stock held in Investment Fund A. 




                                         -38-
<PAGE>

          Such voting rights shall be exercised by the Trustee only to the
          extent directed by such Participant or Beneficiary.


                                      ARTICLE X

                                    Miscellaneous

                    10.1  Non-guarantee of Employment:  Nothing contained
          in this Plan shall be construed as a contract of employment
          between the Employer and any Employe, or as a right of any
          Employe to be continued in the employment of the Employer, or as
          a limitation of the right of the Employer to discharge any of its
          Employes, with or without cause.

                    10.2  Rights to Fund Assets:  No Employe or Beneficiary
          shall have any right to, or interest in, any assets of the Trust
          Fund upon termination of his employment or otherwise, except as
          provided from time to time under this Plan, and then only to the
          extent of the benefits payable under the Plan to such Employe out
          of the assets of the Trust Fund.  All payments of benefits as
          provided for in this Plan shall be made solely out of the assets
          of the Trust Fund.

                    10.3  Non-alienation of Benefit:  Except in respect of
          (i) the creation, assignment or recognition of a right to any
          benefit under the Plan pursuant to the provisions of a "qualified
          domestic relations order" as defined in Section 414(p)(1)(A) of
          the Code, and (ii) assignments relating to Participant Loans as
          provided in Section 7.7, benefits payable under this Plan shall
          not be subject in any manner to anticipation, alienation, sale,
          transfer, assignment, pledge, encumbrance, charge, garnishment,
          execution or levy of any kind, either voluntary or involuntary,
          including any such liability which is for alimony or other
          payments for the support of a spouse or former spouse, or for any
          other relative of the Employe, prior to actually being received
          by the person entitled to the benefit under the terms of the
          Plan; and any such attempt to anticipate, alienate, sell,
          transfer, assign, pledge, encumber, charge or otherwise dispose
          of any right to benefits payable hereunder, shall be void. 
          Except as provided above, the Trust Fund shall not in any manner
          be liable for, or subject to, the debts, contracts, liabilities,
          engagements or torts of any person entitled to benefits
          hereunder.

                    10.4  Discontinuance of Employer Contributions:  In the
          event of permanent discontinuance of contributions to the Plan by
          any Employers, the Employer Contribution Accounts of all
          Participants who are Employes of such Employer and who are
          affected by such discontinuance shall, as of the date of such
          discontinuance, become fully vested.




                                         -39-
<PAGE>
      
                    10.5  Notice of Address:  Each Participant or
          Beneficiary shall file with the Committee a written notice giving
          his post office address and each change of post office address. 
          Any communication, statement or notice addressed and mailed,
          postage prepaid, to such person at his latest post office address
          as so filed shall constitute an effective notice upon such person
          for all purposes of the Plan, and neither the Trustee, the
          Employers nor the Committee shall be obliged to search for or
          ascertain the whereabouts of any such person.  If any such person
          is notified that he is entitled to payment under the Plan, and
          also is notified of the provisions of this Section 10.5, and such
          person fails to claim his benefits or make his whereabouts known
          within one year thereafter, the remaining interest of such person
          may be distributed to any one or more of the spouse or next of
          kin of the Participant or Beneficiary involved.

                    10.6  Applicable Law:  All questions arising in respect
          of the Plan, including those pertaining to its validity,
          interpretation and administration, shall be governed, controlled
          and determined in accordance with the laws of the state of
          Illinois insofar as such laws are not preempted by the laws of
          the United States.  The Plan is intended to be a profit sharing
          plan within the meaning of Sections 401(a)(1) and 401(a)(27) of
          the Code.


                                      ARTICLE XI

                          Amendments and Action by Employer

                    11.1  Amendments:  The Company reserves the right to
          make from time to time any amendment or amendments to this Plan
          for all Employers which do not cause any part of the Trust Fund
          to be used for, or diverted to, any purpose other than the
          exclusive benefit of Participants or their Beneficiaries,
          provided, however, that the Company may make any amendment it
          determines necessary or desirable, with or without retroactive
          effect, to comply with IRS or the Code.

                    11.2  Action by Employers:  Any action by the Company
          or any Employer under this Plan may be by resolution of its board
          of directors, or by any person or persons duly authorized by
          resolution of said board of directors to take such action.


                                     ARTICLE XII

               Successor Employer and Merger or Consolidation of Plans

                    12.1  Successor Employer:  In the event of the
          dissolution, merger, consolidation or reorganization of the
          Employer, provision may be made by which the Plan and Trust will



                                         -40-
<PAGE>

          be continued by the successor (subject to the consent of the
          Company); and, in that event, such successor shall be substituted
          for the Employer under the Plan.  The substitution of the
          successor shall constitute an assumption of the Employer's Plan
          liabilities by the successor and the successor shall have all of
          the powers, duties and responsibilities of the Employer under the
          Plan.

                    12.2  Plan Assets:  In the event of any merger or
          consolidation of the Plan with, or transfer in whole or in part
          of the assets and liabilities of the Trust Fund to, another trust
          fund held under any other plan of deferred compensation
          maintained or to be established for the benefit of all or some of
          the Participants of this Plan, the assets of the Trust Fund
          applicable to such Participants shall be transferred to the other
          trust fund only if:

                    (a)  each participant would (if either this Plan or the
               other plan then terminated) receive a benefit immediately
               after the merger, consolidation or transfer which is equal
               to or greater than the benefit he would have been entitled
               to receive immediately before the merger, consolidation or
               transfer (if this Plan had then terminated);

                    (b)  resolution of the Board and of any new or
               successor employer of the affected Participants, shall
               authorize such transfer of assets; and, in the case of the
               new or successor employer of the affected Participants, its
               resolutions shall include an assumption of liabilities with
               respect to such Participants' inclusion in the new
               employer's plan; and

                    (c)  such other plan and trust are qualified under
               Sections 401(a) and 501(a) of the Code.


                                     ARTICLE XIII

                                   Plan Termination

                    13.1  Right to Terminate:  In accordance with the
          procedure set forth in this Article, the Company may terminate
          the Plan at any time, and any Employer as to itself may terminate
          the Plan in whole or in part at any time or from time to time. 
          In the event of the dissolution, merger, consolidation or
          reorganization of an Employer, the Plan shall terminate as to
          such Employer unless the Plan is continued by a successor to the
          Employer in accordance with Section 12.1.  The Plan shall also
          terminate with respect to an Employer in the event the Plan is
          disqualified as to it by the Internal Revenue Service.





                                         -41-
<PAGE>
      
                    13.2  Partial Termination:  Upon termination of the
          Plan with respect to a group of Participants which constitutes a
          partial termination of the Plan, the Trustee shall allocate and
          segregate for the benefit of the Employes then or theretofore
          employed by the Employer with respect to which the Plan is being
          terminated the proportionate interest of such Participants in the
          Trust Fund.  The funds so allocated and segregated shall be used
          by the Trustee to pay benefits to or on behalf of Participants in
          accordance with Section 13.3.

                    13.3  Liquidation of the Trust Fund:  Upon termination
          or partial termination of the Plan, the Employer contribution
          Accounts of all Participants affected thereby shall become fully
          vested, and the Trustee shall distribute the assets remaining in
          the Trust Fund, or the portion thereof segregated in accordance
          with Section 13.2, after payment of any expenses properly
          chargeable thereto, to Participants and Beneficiaries affected in
          proportion to their respective Account balances; provided,
          however, that no distribution shall be made to any Participant
          until he attains age 59-l/2 except in the case of termination of
          employment or as otherwise provided in Section 7.3 and further
          provided, that no distribution shall be made to affected
          Participants if a successor plan, as defined in the applicable
          Treasury Regulations, is established or maintained by an
          Employer.

                    13.4  Manner of Distribution:  To the extent that no
          discrimination in value results, any distribution after
          termination or partial termination of the Plan may be made, in
          whole or in part, in cash, in securities or other assets in kind,
          or in non-transferable annuity contracts, as the Committee (in
          its discretion) may determine.  All non-cash distributions shall
          be valued at fair market value at date of distribution.


                                     ARTICLE XIV

                                 Top-Heavy Provisions

                    14.1  Top-Heavy Provisions:  The following provisions
          shall become effective in any Plan Year beginning on or after
          January 1, 1984 in which the Plan is determined to be a "top-
          heavy plan."

                    (a)  The Plan will be considered a "top-heavy plan" for
               a Plan Year if as of the last day of the next preceding Plan
               Year (i) the aggregate value of the Accounts of
               Participants, including former Participants, who are "key
               employes" as defined in Section 416(i)(1) of the Code
               exceeds 60% of the aggregate value of the Accounts of all
               Participants, including former Participants or (ii) the Plan
               is part of a required aggregation group (as defined below)



                                         -42-
<PAGE>

               and the required aggregation group is top-heavy.  However,
               and notwithstanding the above, the Plan shall not be
               considered a "top-heavy plan" for any Plan Year in which the
               Plan is a part of a required or permissive aggregation group
               (within the meaning of Section 416(g) of the Code) that is
               not top-heavy.  For purposes of this subsection, the value
               of a Participant's or former Participant's Account shall be
               adjusted as provided in Sections 416(g)(3) and (4) of the
               Code.  A "required aggregation group" shall mean each quali-
               fied plan of an Employer or Subsidiary in which a "key
               employe" participates and any other qualified plan of an
               Employer or Subsidiary that enables any such plan to meet
               the requirements of Sections 401(a)(4) or 410 of the Code. 
               A Participant's or former Participant's compensation (as
               defined in Section 4.4) from the Employers and Subsidiaries
               for a Plan Year shall be used, where applicable, in
               determining whether he is a "key employe."

                    (b)  Notwithstanding the provisions of Article IV to
               the contrary, if for any Plan Year the Plan is a "top-heavy
               plan," each Employer shall contribute to the Trust Fund in
               respect of each of its Employes who is an Eligible Employe
               (as hereinafter defined) on the last day of the Plan Year
               and who is not a "key employe," an amount equal to the
               excess, if any, of (i) over (ii), where (i) is the lesser of
               (A) three (3) percent of such Eligible Employe's
               compensation (as defined in Section 4.4) from the Employer
               for the Plan Year and (B) to the extent permitted under
               Section 416(c)(2)(B) of the Code, the percentage of such
               Eligible Employe's compensation (as defined in Section 4.4)
               from the Employer for the Plan Year equal to the percentage
               of compensation (not in excess of the compensation
               limitation described in Section 401(a)(17) of the Code),
               adjusted for increases in the cost of living pursuant
               thereto of employer contributions (excluding for Plan Years
               beginning prior to January 1, 1985 contributions made
               pursuant to a salary reduction agreement) and forfeitures
               allocated for the Plan Year under the Plan and each other
               qualified defined contribution plan maintained by the
               Employers and Subsidiaries to a "key employe" for whom such
               percentage is the highest for such Plan Year, and (ii) is
               the sum of (A) the amount of Employer contributions made in
               respect of such Eligible Employe under Section 4.3 (and,
               effective for Plan Years beginning on or after January 1,
               1985, under Section 4.2) for such Plan Year plus the amount
               of forfeitures allocated to such Eligible Employe under
               Section 6.2(e) for such Plan Year and (B) the amount of
               employer contributions (excluding for Plan Years beginning
               prior to January 1, 1985 contributions made pursuant to a
               salary reduction agreement) and forfeitures allocated to the
               Eligible Employe under all other qualified defined
               contribution plans maintained by the Employers and



                                         -43-
<PAGE>

               Subsidiaries.  However, and notwithstanding the above, the
               provisions of this Section 14.1(b) shall not apply for any
               Plan Year with respect to an Eligible Employe who has
               accrued the defined benefit minimum provided under
               Section 416 of the Code under a qualified defined benefit
               plan maintained by an Employer or any Subsidiary.  Any
               amount contributed in accordance with this Section 14.1(b)
               in respect of an Eligible Employe for a Plan Year shall be
               deemed to be a contribution made under Section 4.3 of the
               Plan for such Plan Year and shall be made by the Employer on
               or before the due date (including extensions) for filing the
               Company's consolidated federal income tax return for the
               calendar year corresponding to such Plan Year.  Any Eligible
               Employe for whom such a contribution is made who is not
               already a Participant shall, notwithstanding the provisions
               of Section 3.2, become a Participant in the Plan as of the
               last day of the Plan Year for which the contribution is
               made.

                    (c)  For purposes of this Article XIV, "Eligible
               Employe" shall mean an Employe who is eligible to
               participate in the Plan as provided in Section 3.1 other
               than an Employe who is included in a unit of employes
               covered by a collective bargaining agreement between employe
               representatives and one or more Employers if there is
               evidence that retirement benefits have been the subject of
               good faith bargaining between such employe representatives
               and such Employer or Employers.

                    IN WITNESS WHEREOF, Commonwealth Edison Company has
          caused this instrument to be executed in its name by its 
          Chairman and its corporate seal to be hereunto affixed, attested
          by its            Secretary, on this 1st day of July, 1992.
                 ----------

                                        COMMONWEALTH EDISON COMPANY




                                        By:
                                           ----------------------------
                                                  Chairman 


          ATTEST:


          --------------------------------
                    Secretary






                                         -44-



                                                 Exhibit (4)-4
                                                 Unicom Corporation
                                                 Form S-8 
                                                 File No. 33-52109
                                          








                                 COMMONWEALTH EDISON

                      EMPLOYE SAVINGS AND INVESTMENT PLAN TRUST







                                                         








          -----------------------------------------
          Retyped to reflect Amendments 1 through 4

<PAGE>

                                 COMMONWEALTH EDISON
                      EMPLOYE SAVINGS AND INVESTMENT PLAN TRUST
                          ----------------------------------


                    THIS AGREEMENT, made and entered into at Chicago,
          Illinois, this 4th day of March, 1983, by and between
          COMMONWEALTH EDISON COMPANY, a corporation organized and existing
          under the laws of the State of Illinois (hereinafter referred to
          as "Edison"), and THE FIRST NATIONAL BANK OF CHICAGO, a national
          banking association of Chicago, Illinois, and its corporate
          successors (hereinafter referred to as the "Trustee"),

                                  WITNESSETH:  That,

                    WHEREAS, Edison has heretofore adopted the Commonwealth
          Edison Employe Savings and Investment Plan for the benefit of
          eligible Employes, as therein defined, which plan as from time to
          time amended is hereinafter referred to as the "Plan"; and

                    WHEREAS, Edison desires to establish a trust to be
          known as the Commonwealth Edison Employe Savings and Investment
          Plan Trust to aid in the proper execution of the Plan;

                    NOW, THEREFORE, Edison and the Trustee do hereby
          declare and agree as follows:


                                     ARTICLE ONE

                    1.01  The Trustee shall hold for the purposes hereof
          all contributions and other property received by it from or at
          the direction of Edison or any Employer and the Trustee need not
          inquire into the source of any money or property transferred to
          it nor into the authority or right of the transferor of such
          money or property to transfer such money or property to the
          Trustee.  All money and other property held by the Trustee
          hereunder at the time of reference is referred to herein as the
          "Trust Fund."  The Trust Fund shall be held by the Trustee in
          trust and dealt with in accordance with the provisions of this
          Agreement.

                    1.02  The Trustee shall make such payments from the
          Trust Fund as the Committee appointed pursuant to the provisions
          of the Plan, and hereinafter referred to generally as the
          "Committee," shall from time to time direct in writing.  Such
          payments may be made directly to such person or persons, natural
          or otherwise, at such time and in such amounts as the Committee
          directs, and Edison warrants that no direction will be issued to
          the Trustee by the Committee other than in accordance with the
          terms of the Plan.  Words and phrases are used interchangeably in
          the Plan and this Agreement, and a word, term or phrase defined
          in either is similarly defined for the purposes of the other


                                         -2-
<PAGE>
      
          unless otherwise qualified.  The term "Agreement," "herein,"
          "hereunder," and similar terms mean this Agreement unless
          qualified by the context.

                    1.03  The Trustee shall not be under any duty to
          require payment of any contributions to the Trust Fund, or to see
          that any payment made to it is computed in accordance with the
          provisions of the Plan, or otherwise be responsible for the
          adequacy of the Trust Fund to meet and discharge any liabilities
          under the Plan.


                                     ARTICLE TWO

                    2.01  The Trust Fund shall consist of the following
          separate investment funds:  the Unicom Corporation Common Stock
          Fund, the Fixed Income Securities Fund, the Diversified Fund and,
          effective October 1, 1985, the Stated Return Fund.  The
          respective investment funds shall be managed and invested in
          accordance with the following general purposes:

                         (a)  The Unicom Corporation Common Stock Fund
                    shall be invested primarily in common stock of Unicom
                    Corporation;

                         (b)  The Fixed Income Securities Fund shall be 
                    invested in major portion in high grade securities with
                    maturities of 5 years or less from the date of
                    purchase;

                         (c)  The Diversified Fund shall be invested
                    primarily in corporate equity securities and corporate
                    debt securities.  Investment may also be in other
                    appropriate investments, including but not limited to,
                    real estate, foreign securities and venture capital
                    opportunities;

                         (d)  The Stated Return Fund shall be invested
                    primarily in one or more investment contracts issued by
                    either (i) an insurance carrier or carriers or (ii) a
                    bank or banks;

                         (e)  The Stock Index Fund shall be established
                    effective October 1, 1989, and shall be invested
                    primarily to perform as closely as possible to the
                    Standard and Poor's 500 Composite Stock Price Index.

                    Each investment fund may also invest any cash balances
          held from time to time in short term cash equivalents having
          ready marketability, including but not limited to, U.S. Treasury
          Bills, commercial paper, certificates of deposit of the Trustee,
          bankers acceptances, collective investment funds established for



                                         -3-
<PAGE>

          cash management purposes, and similar type securities with a
          maturity not to exceed fifteen months.

                    The Fixed Income Securities Fund, the Diversified Fund
          and the Stock Index Fund may be invested through common,
          collective or pooled investment funds to the extent such funds
          meet the investment criteria set forth in this Section 2.01.

                    Edison may direct the Trustee to establish additional
          investment funds.

                    Transfers between the investment funds may only be made
          on Committee direction as of the first day of any month.

                    2.02  Consistent with the provisions of Section 2.01,
          the Trustee, subject to Edison's power of direction provided in
          Section 2.07, is authorized and empowered and, in respect of
          paragraph (a), (b) and (f) (iii), directed:

                         (a)  to invest and reinvest the Unicom Corporation
                    Common Stock Fund, without distinction between
                    principal and income, in common stock of Unicom
                    Corporation;

                         (b)  to invest cash dividends received on Unicom
                    Corporation common stock held by the Unicom Corporation
                    Common Stock Fund, less any expenses to be paid from
                    such dividends in accordance with the directions of the
                    Committee, in Unicom Corporation's common stock and
                    such investment may be made through any dividend
                    reinvestment plan established by Unicom Corporation if
                    directed by the Committee;

                         (c)  to invest and reinvest each of the Fixed
                    Income Securities Fund and the Balanced Fund, without
                    distinction between principal and income, in such
                    stocks, bonds, notes, mortgages or other obligations,
                    trust and participation certificates, beneficial
                    interests in any trust, including, but not limited to,
                    trusts which the Trustee may create or has created
                    alone or in participation with others, including common
                    or collective or pooled investment funds, leaseholds,
                    or in such other property, or interests therein,
                    whether real or personal, and wherever situate, as the
                    Trustee deems proper, without any requirement that any
                    investment be productive of income;

                         (d)  to keep any cash as may be reasonable and
                    practicable under the circumstances on deposit in its
                    own banking department or elsewhere as the Trustee
                    elects and the Trustee shall not be required to pay
                    interest on any such cash held by it;



                                         -4-
<PAGE>
      
                         (e)  to sell by private contract or at public
                    auction, exchange, convey, transfer or otherwise
                    dispose of any property held by it, and no person
                    dealing with the Trustee shall be bound to see to the
                    application of the purchase money or property delivered
                    to the Trustee, to inquire into the validity,
                    expediency or propriety of any such sale or other
                    disposition, or to inquire into the terms of this
                    Agreement or to see that such terms are complied with;

                         (f)  with respect to the Unicom Corporation Common
                    Stock Fund, (i) to vote the common stock of Unicom
                    Corporation only as and to the extent directed by the
                    Participant or Beneficiary with respect to his
                    proportional interest in such fund as provided in
                    Section 9.11 of the Plan; (ii) to give, to the extent
                    it has received direction to vote, proxies or powers of
                    attorney with or without power of substitution; (iii)
                    to exercise to the extent cash is available any
                    conversion privileges, subscription rights or other
                    options for the purchase of additional Unicom
                    Corporation common stock and to make any payments
                    incidental thereto; and (iv) to participate in any
                    corporate reorganization or other change affecting
                    Unicom Corporation common stock;

                         (g)  with respect to the Fixed Income Securities
                    Fund and the Balanced Fund, to vote upon any stocks,
                    bonds or other securities; to give general or special
                    proxies or powers of attorney with or without power of
                    substitution; to exercise any conversion privileges,
                    subscription rights or other options and to make any
                    payments incidental thereto; to consent to or otherwise
                    participate in corporate reorganizations or other
                    changes affecting corporate securities and to delegate
                    discretionary powers and to pay any assessments or
                    charges in connection therewith; and generally to
                    exercise any of the powers of an owner with respect to
                    stocks, bonds, notes or other property held in each
                    such investment fund;

                         (h)  to make, execute, acknowledge and deliver any
                    and all documents of transfer and conveyance and any
                    and all other instruments that may be necessary or
                    appropriate to carry out the powers herein granted;

                         (i)  to register any investment held in the Trust
                    Fund in its own name or in the name of a nominee and to
                    hold any investment in bearer form, but the books and
                    records of the Trustee shall at all times show that all
                    such investments are part of the Trust Fund;




                                         -5-
<PAGE>

                         (j)  to employ suitable agents or custodians, and
                    to employ counsel who may but need not be counsel for
                    Edison; and the Trustee shall be fully protected in
                    acting upon the advice of such counsel;

                         (k)  to require, before making any payment as
                    directed pursuant to Section 1.02 hereof, such
                    releases, indemnities or other documents from any
                    lawful taxing authority or governmental body,
                    department or agency as it may consider necessary for
                    its protection without any liability for payment of
                    interest on funds retained by it pending receipt by it
                    of such releases, indemnities or other documents; and

                         (l)  to do all acts, whether or not expressly
                    authorized, which it may deem necessary or proper for
                    the protection of the property held hereunder.

                         In determining whether the Trustee has complied
                    with Section 404(a)(1)(B) of the Employee Retirement
                    Income Security Act of 1974, as heretofore or hereafter
                    amended ("ERISA"), or under any comparable section of
                    any future legislation which amends, supplements, or
                    supersedes said Section, the Trust Fund shall be
                    considered in its entirety and separate investments and
                    transactions shall not be considered in making such a
                    determination.

                    2.03  The Trustee shall maintain or cause to be
          maintained the records showing the interest of each Participant
          under the Trust Fund as directed by the Committee.

                    2.04  Edison intends that the Trust herein created
          shall qualify as an "Exempt Organization" within the meaning of
          Section 501(a) of the Internal Revenue Code of 1954, as amended
          from time to time (the "Code"), or under any comparable Section
          of any future legislation which amends, supplements, or
          supersedes said Section, and until advised to the contrary, the
          Trustee may assume that the Trust is so qualified and is entitled
          to tax exemption.

                    2.05  Any investment manager appointed pursuant to
          Section 2.07 is specifically authorized to invest and reinvest
          any part or all of the Trust Fund assets subject to its
          investment direction in any common, collective or pooled trust
          fund maintained by any bank or trust company (whether or not
          acting as a trustee, co-trustee or agent for the Trustee
          hereunder) as a medium for the collective investment of funds of
          pension, profit sharing or other employee benefit plans, which
          are qualified under Section 401(a) and exempt from taxation under
          Section 501(a) of the Code.  Any assets deposited with the
          trustee of a collective trust fund shall be held and invested by
          the trustee thereunder pursuant to all the terms and conditions


                                         -6-
<PAGE>
      
          of the trust agreement or declaration of trust establishing such
          trust fund, which agreement or declaration is hereby incorporated
          herein by reference and shall prevail over any contrary provision
          of this Agreement.

                    2.06  To the extent permitted by law or regulations or
          rulings thereunder, any investment in stocks, bonds, notes or
          other securities or property shall not be deemed an improper or
          imprudent investment merely because the Trustee has individually
          participated in the issuance, underwriting or original sale,
          whether as a member of a syndicate, participation, or any other
          way, or a part or all of the proceeds received by the issuer or
          seller are to be used to satisfy any obligations of the issuer or
          seller to the Trustee individually.

                    2.07  Edison may direct the Trustee to segregate all or
          a portion of the Trust Fund in a separate investment account or
          accounts and may appoint an investment manager, as defined in
          ERISA, to direct the investment and reinvestment of each such
          investment account or accounts.  In such event, Edison shall
          notify the Trustee of the appointment of such investment manager.
          Thereafter, the Trustee shall make every sale or investment as
          directed in writing by the investment manager.  It shall be the
          duty of the Trustee to act strictly in accordance with each
          direction.  The Trustee shall be under no duty to question any
          such direction of the investment manager, to review any
          securities or other property held in any such investment account
          or accounts acquired by it pursuant to such directions or to make
          any recommendations to the investment managers with respect to
          such securities or other property.  Notwithstanding the
          foregoing, the Trustee, without obtaining prior approval or
          direction from an investment manager, shall invest cash balances
          held by it from time to time in short term cash equivalents
          including, but not limited to, units in its short term collective
          investment fund if otherwise permitted by the terms of this
          Agreement, U.S. Treasury Bills, commercial paper (including such
          forms of commercial paper as may be available through the
          Trustee's Trust Department), certificates of deposit (including
          those issued by the Trustee), and similar type securities, with a
          maturity not to exceed one year; and, furthermore, sell such
          short term investments as may be necessary to carry out the
          instructions of an investment manager regarding more permanent
          type investment and directed distributions.  The Trustee shall
          not be liable or responsible for any loss resulting to the Trust
          Fund by reason of any sale or investment made pursuant to the
          direction of an investment manager nor by reason of the failure
          to take any action with respect to any investment which was
          acquired pursuant to any such direction in the absence of further
          directions of such investment manager.  Notwithstanding anything
          in this Agreement to the contrary, the Trustee shall be
          indemnified and saved harmless by Edison from and against any and
          all personal liability to which the Trustee may be subjected by
          carrying out any directions of an investment manager issued


                                         -7-
<PAGE>

          pursuant hereto or for failure to act in the absence of
          directions of the investment manager including all expenses
          reasonably incurred in its defense in the event Edison fails to
          provide such defense; provided, however, the Trustee shall not be
          so indemnified if it participates knowingly in, or knowingly
          undertakes to conceal, an act or omission of an investment
          manager, having actual knowledge that such act or omission was a
          breach of fiduciary duty; provided further, however, that the
          Trustee shall not be deemed to have knowingly participated in or
          knowingly undertaken to conceal an act or omission of an
          investment manager with knowledge that such act or omission was a
          breach of fiduciary duty by merely complying with directions of
          an investment manager or for failure to act in the absence of
          directions of an investment manager or by reason of maintaining
          accounting records.  The Trustee may rely upon any order,
          certificate, notice, direction or other documentary confirmation
          purporting to have been issued by the investment manager which
          the Trustee believes to be genuine and to have been issued by
          such investment manager.  The Trustee shall not be charged with
          knowledge of the termination of the appointment of any investment
          manager until it receives written notice thereof from Edison.

                    2.08  The Trustee shall have full power to apply for or
          otherwise acquire, deal with and dispose of annuity or other
          forms of insurance company contracts, pay premiums, purchase
          payments, or other forms of consideration therefor and exercise
          any and all rights, privileges, options and elections thereunder,
          but shall exercise such power and execute documents pertaining
          thereto only in the form and manner and to the extent from time
          to time directed by the Committee.  The Trustee shall have no
          duty to question the propriety of any such direction or to
          inquire into the terms, provisions, or value of any documents
          executed by it pursuant thereto, or of any insurance company
          contracts acquired by it, it being the duty of the Committee to
          direct the Trustee with respect thereto regardless of the terms
          and provisions of such insurance company contracts.  The Trustee
          shall be indemnified and saved harmless by Edison from and
          against any and all personal liability to which the Trustee may
          be subjected by reason of acting pursuant hereto or by the
          retention of or failure to take any action whatsoever with
          respect to any insurance company contracts in the absence of
          further directions of the Committee; and the Trustee shall be
          reimbursed by Edison for all expenses reasonably incurred in its
          defense in the event Edison fails to provide such defense. 
          Payment of a part or all of the value of the interest of a
          distributee to an insurance company as directed by the Committee
          or delivery of an insurance company contract to the Committee or
          to the person designated by it shall constitute a full release
          and discharge of the Trustee with respect thereto.

                    2.09  No person, including insurance carriers, shall be
          obliged to see to the application of any money paid or property
          delivered to the Trustee, nor shall any such person by required


                                         -8-
<PAGE>

          to take cognizance of the provisions of this Agreement or the
          Plan, nor to question the authority of the Trustee to do any act
          as respects any policy or contract nor the authority of the
          Trustee to receive and receipt for any money becoming due and
          payable under any policy or contract according to its terms nor
          the authority of the Trustee to exercise any incidents of
          ownership in any policy, nor be obliged to inquire as to whether
          or not the Trustee has secured the direction, consent or approval
          of the Committee to any proposed action.


                                    ARTICLE THREE

                    3.01  The expenses incurred by the Trustee in the
          administration of the Trust Fund, including fees for legal
          services rendered to the Trustee, such compensation to the
          Trustee as may be agreed upon from time to time between Edison
          and the Trustee, all other proper charges and expenses of the
          Trustee and of its agents and counsel, and all expenses incurred
          by Edison, the Employers and the Committee in the administration
          of the Plan, or otherwise, including, but not limited to,
          accounting and legal expenses, shall be paid from the Trust Fund
          in accordance with the terms of the Plan.  All taxes of any and
          all kinds whatsoever that may be levied or assessed under
          existing or future laws upon the Trust Fund or the income
          thereof, and investment expenses, shall be paid from the Trust
          Fund.  The Committee may in its discretion allocate specific
          expenses and charges to a particular investment fund.

                    3.02  The Trustee shall be indemnified and saved
          harmless by Edison from and against any and all personal
          liability to which the Trustee may be subjected by reason of any
          act done or omitted to be done in its official capacity in
          carrying out any directions of Edison or the Committee issued in
          accordance with this Agreement, including the holding of Unicom
          Corporation common stock, and the Trustee shall be reimbursed by
          Edison for all expenses reasonably incurred in its defense in the
          event Edison fails to provide such defense.

                    3.03  The Trustee shall keep accurate and detailed
          accounts of all investments, receipts, disbursements and other
          transactions hereunder, and all accounts, books and records
          relating thereto shall be open to inspection and audit at all
          reasonable times by any person designated by Edison.  As of the
          close of each month, or as of the close of such other accounting
          period as Edison may from time to time designate, and as of the
          date of the removal or resignation of the Trustee as provided in
          Section 3.04 hereof, the Trustee shall file with Edison a written
          account setting forth all investments, receipts, disbursements
          and other transactions effected by it during the period from the
          date of its last such account and a list of the assets of each
          investment fund of the Trust Fund at the close of such period. 
          It shall be the duty of Edison to review such written account


                                         -9-
<PAGE>

          promptly within 90 days from the date of filing any such account
          and the Trustee shall be forever released and discharged from all
          liability and accountability to anyone with respect to the
          propriety of its acts and transactions shown in such account
          except with respect to any such acts or transactions as to which
          Edison shall within such 90-day period file written objections
          with the Trustee.  The approval of any accounting, act or
          procedure by Edison shall be a full acquittance and discharge to
          the Trustee with respect thereto.  Nothing herein contained,
          however, shall be deemed to preclude the Trustee's right to have
          its account judicially settled by a court of competent
          jurisdiction.

                    3.04  The Trustee may be removed by action of the Board
          of Directors of Edison at any time upon 30 days' notice in
          writing to the Trustee.  The Trustee may resign at any time upon
          30 days' notice in writing to Edison.  In either case, the
          necessity for such 30 days' notice may be waived by the mutual
          agreement of the Trustee and Edison.  Upon such removal or
          resignation of the Trustee, Edison shall appoint a successor
          trustee who shall have the same powers and duties as those
          conferred upon the Trustee hereunder, and upon acceptance of such
          appointment by the successor trustee, the Trustee shall assign,
          transfer and pay over to such successor trustee the funds and
          properties then constituting the Trust Fund.  The Trustee is
          authorized, however, to reserve such reasonable sum of money as
          it may deem advisable, to provide for any sums chargeable against
          the Trust Fund for which it may be liable, and for payment of its
          fees and expenses in connection with the settlement of its
          account or otherwise, and any balance of such reserve remaining
          after the payment of such fees and expenses shall be paid over to
          the successor trustee.


                                     ARTICLE FOUR

                    4.01  Any action by Edison pursuant to any of the
          provisions of this Agreement, except as provided in Sections 3.04
          and 5.02 hereof, shall be by written instruction signed by its
          President or one of its Vice Presidents, or by written instrument
          executed by any person authorized by any one of the above to take
          such action; and the Trustee shall be fully protected in acting
          in accordance with any such written instrument received by it.

                    4.02  All notices, orders, requests and instructions of
          the Committee to the Trustee shall be in writing signed by any
          one of its members or by its Secretary and the Trustee shall act
          and shall be fully indemnified and saved harmless by Edison
          pursuant to Section 3.02 of this Agreement in acting in reliance
          upon and in accordance with such notices, orders, requests and
          instructions, and shall have no duty to see to the application of
          any funds paid in accordance therewith.  Edison by any one of its
          officers will certify to the Trustee the appointment and


                                         -10-
<PAGE>
      
          termination of office of members of the Committee and the
          Committee's Secretary and the Trustee shall not be charged with
          knowledge thereof until it receives such notice.

                    4.03  Evidence required of anyone under this Agreement
          may be by certificate, affidavit, endorsement or any other
          written instrument which the person acting in reliance thereon 
          believes to be pertinent, reliable and genuine, and to have been
          signed, made or presented by the proper and duly authorized party
          or parties.

                    4.04  Whenever the Trustee shall deem it necessary that
          a matter be proved prior to taking, suffering or omitting any
          action, such matter shall be deemed to be conclusively proved by
          the certificate of Edison or the Committee delivered to the
          Trustee, but the Trustee, in its discretion, may, in lieu of such
          certification, accept or may require such other or further
          evidence as it may deem sufficient.


                                     ARTICLE FIVE

                    5.01  In the event of the termination of the Plan as
          provided therein, Edison shall apply to the U.S. Treasury
          Department for a determination letter that such termination does
          not adversely affect the qualified status of the Plan nor the tax
          exempt status of this Trust under the appropriate sections of the
          Code.  Upon receipt of a copy of a favorable determination letter
          issued by the U.S. Treasury Department, the Trustee shall dispose
          of the Trust Fund in accordance with the written order of the
          Committee.  In the event the U.S. Treasury Department issues an
          adverse determination letter, the Trustee shall dispose of the
          Trust Fund in accordance with the written order of the Committee;
          provided, however, that the Trustee is authorized to reserve such
          sums of money as it may deem advisable to provide for any taxes
          for which it believes it may be liable or may be chargeable
          against the Trust Fund to pay such taxes.  In any event, the
          Trustee is authorized, before disposing of the Trust Fund
          pursuant to this Section 5.01, to reserve such sums of money as
          it may deem advisable to provide for any sums chargeable against
          the Trust Fund for which it may be liable and for payment of its
          fees and expenses in connection with the settlement of its
          account or otherwise and to pay such charges, fees and expenses. 
          Any balance of any such sums reserved remaining after the payment
          of such taxes, charges, fees and expenses shall be disposed of in
          accordance with the written order of the Committee.  Edison has
          the duty to make certain and warrants that any disposition of the
          Trust Fund or any portion thereof hereunder shall be in
          accordance with the provisions of ERISA and that the conditions
          of the following sentence shall be met with respect to such
          disposition and the Trustee shall have no duty with respect
          thereto.  At no time shall any part of the corpus or income of
          the Trust Fund, after deducting any expenses properly chargeable


                                         -11-
<PAGE>

          to the Trust Fund, be used for or diverted to purposes other than
          for the exclusive benefit of persons having an interest therein
          under the Plan except as provided in Section 8.1 of the Plan.

                    5.02  By action of its Board of Directors, Edison
          reserves the right at any time and from time to time by written
          instrument delivered to the Trustee to alter or amend this
          Agreement in whole or in part; provided, however, that no such
          alteration or amendment, under any circumstances, shall be valid,
          the effect of which would be:  (a) to revest in the Employers any
          interest in the assets of the Trust Fund or any part thereof
          (except to the extent permitted under Section 8.1 of the Plan);
          or (b) to divest any person having an interest thereunder, except
          that amendments may be so made if, in the opinion of Edison's
          counsel, such action is necessary to meet the requirements of
          Section 401 of the Code; or (c) to change the rights, powers or
          duties of the Trustee without its consent.

                    5.03  In the event of the merger or consolidation of
          Edison or any Employer or other circumstances whereby a successor
          person, firm or company shall continue to carry on all or a
          substantial part of its business, and such successor shall elect
          to carry on the provisions of the Plan as therein provided, such
          successor, subject to the consent of Edison with respect to an
          Employer other than Edison, shall be substituted for Edison or
          such Employer, as the case may be, hereunder, upon the filing in
          writing of its election so to do with the Trustee.  The Trustee
          may, but need not, rely on the certification of an officer of
          Edison, and a certified copy of a resolution of the Board of
          Directors of such successor, reciting the facts, circumstances
          and consummation of such succession and the election of such
          successor to continue the Plan as conclusive evidence thereof,
          without requiring any additional evidence.

                    5.04  Nothing contained in the Plan, either expressly
          or by implication, shall be deemed to impose any powers, duties
          or responsibilities on the Trustee other than those set forth in
          this Agreement.

                    5.05  Subject to the provisions of ERISA relating to
          parties entitled to participate in proceedings relating to the
          Plan and Trust, necessary parties to any accounting, litigation
          or other proceedings shall include only the Trustee and Edison
          and the settlement or judgment in any such case in which Edison
          is duly served or cited shall be binding upon all Participants of
          the Plan, and their beneficiaries and estate, and upon all
          persons claiming by, through or under them.

                    5.06  The right to distributions directed to be made
          hereunder may not be voluntarily or involuntarily sold,
          transferred or assigned by any Participant, or by any
          Beneficiary, nor shall they be in any way liable to the claim of
          any creditor of any such person.


                                         -12-
<PAGE>

                    5.07  If any payment of a benefit hereunder mailed by
          U.S. Mail to the last address of the payee furnished the Trustee
          by the Committee is returned unclaimed, the Trustee shall notify
          the Committee and shall discontinue further payments to such
          payee until it receives the further instructions of the
          Committee.
                
                    5.08  This Agreement shall be construed and enforced
          according to the laws of the State of Illinois, and all
          provisions hereof shall be administered according to the laws of 
          said State insofar as such laws are not preempted by the
          provisions of ERISA.

                    5.09  Notwithstanding any provision of this Agreement
          to the contrary, contributions made by Edison or any Employer may
          be returned to Edison or such Employer if Edison or such Employer
          certifies that such return is in compliance with Section 403(c)
          of ERISA.

                    IN WITNESS WHEREOF, the Parties hereto have caused this
          Agreement to be executed by their respective duly authorized
          officers and their corporate seals to be hereunto affixed and
          attested as of the day and year first above written.

                                        COMMONWEALTH EDISON COMPANY


                                        By                              
                                          ------------------------------
                                                  President

          ATTEST:


                                       
          -----------------------------
                   Secretary


                                        THE FIRST NATIONAL BANK OF CHICAGO


                                        By                                
                                          --------------------------------
                                                 Vice President

          ATTEST:


                                        
          ------------------------------
                  Trust Officer


                                         -13-







                                                  Exhibit (23)-2
                                                  Unicom Corporation
                                                  Form S-8
                                                  File No. 33-52109     


                      CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


               As independent public accountants, we hereby consent to the
          incorporation by reference in this Post-Effective Amendment No. 1
          on Form S-8 to Registration Statement on Form S-4 of our reports
          dated March 18, 1994 included or incorporated by reference in
          Commonwealth Edison Company's Annual Report on Form 10-K for the
          year ended December 31, 1993 (as amended by the Form 10-K/A-1
          filed on August 31, 1994); our reports dated May 11, 1994 and
          August 9, 1994, included in Commonwealth Edison Company's
          Quarterly Reports on Form 10-Q for the quarterly periods ended
          March 31, 1994 and June 30, 1994 (as amended by the Form 10-Q/A-1
          filed on August 19, 1994), respectively; and our report dated
          March 18, 1994 included in Commonwealth Edison Company's Current
          Report on Form 8-K/A-1 dated January 28, 1994.  We also hereby
          consent to all references to our Firm included in this Post-
          Effective Amendment No. 1 on Form S-8.




                                                  ARTHUR ANDERSEN LLP


          Chicago, Illinois
          September 26, 1994



                                                  Exhibit (24)
                                                  Unicom Corporation
                                                  Form S-8
                                                  File No. 33-52109     
                                                             

                                  POWER OF ATTORNEY                        
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        her true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                     /s/ Jean Allard          
                                              ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that JEAN ALLARD,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that she signed and delivered said instrument as her
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder      
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal) 
<PAGE>

                                  POWER OF ATTORNEY                         
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                    /s/ James W. Compton     
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that JAMES W. COMPTON,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder       
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                          
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        her true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                     /s/ Sue Ling Gin        
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that SUE L. GIN, personally
        known to me to be the same person whose name is subscribed to the
        foregoing instrument, appeared before me this day in person, and
        acknowledged that she signed and delivered said instrument as her
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder        
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                          
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                    /s/ Donald P. Jacobs     
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that DONALD P. JACOBS,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder       
                                                -----------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                          
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                    /s/ George E. Johnson     
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that GEORGE E. JOHNSON,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder        
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                         
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                     /s/ Harvey Kapnick       
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that HARVEY KAPNICK,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder        
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                        
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                     /s/ Byron Lee Jr.        
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that BYRON LEE, JR.,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                    /s/ Mary T. Snyder        
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                         
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                    /s/ Edward A. Mason       
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that EDWARD A. MASON,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder      
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)
<PAGE>

                                  POWER OF ATTORNEY                           
                                  -----------------


        KNOW ALL MEN BY THESE PRESENTS:

                 That the undersigned, a Director of Unicom Corporation, an
        Illinois corporation, does hereby constitute and appoint JAMES J.
        O'CONNOR, SAMUEL K. SKINNER and DAVID A. SCHOLZ, and each of them,
        his true and lawful attorneys and agents, each with full power and
        authority (acting alone and without the others) to execute in the
        name and on behalf of the undersigned as such Director, a Post-
        Effective Amendment on Form S-8 to the Registration Statement on Form
        S-4 (Registration No. 33-52109) relating to the offer and sale of
        Unicom Corporation common stock under the Commonwealth Edison Company
        Employe Savings and Investment Plan and any and all amendments or
        supplements to such Post-Effective Amendment; hereby granting to such
        attorneys and agents, and each of them, full power of substitution
        and revocation in the premises; and hereby ratifying and confirming
        all that such attorneys and agents, or any of them, may do or cause
        to be done by virtue of these presents.

                 IN WITNESS WHEREOF, I have hereunto set my hand this 8th day
        of September, 1994.




                                                      /s/ F A Olson           
                                               ------------------------------

        STATE OF ILLINOIS  )
                           ) SS
        COUNTY OF COOK     )

                 I, Mary T. Snyder, a Notary Public in and for said County,
        in the State aforesaid, DO HEREBY CERTIFY that FRANK A. OLSON,
        personally known to me to be the same person whose name is subscribed
        to the foregoing instrument, appeared before me this day in person,
        and acknowledged that he signed and delivered said instrument as his
        free and voluntary act, for the uses and purposes therein set forth.

                 GIVEN under my hand and the notarial seal this 8th day of
        September, 1994.




                                                     /s/ Mary T. Snyder        
                                               ------------------------------
                                                       Mary T. Snyder
                                                       Notary Public
                                                   (Notary Public Seal)



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