1
                                                                     Exhibit 3.1


                                                          FEDERAL IDENTIFICATION
                                                                  NO. 04-2272148
                                                            --------------------

- --------
Examiner              THE COMMONWEALTH OF MASSACHUSETTS
                            WILLIAM FRANCIS GALVIN
                         Secretary of the Commonwealth
             One Ashburton Place, Boston, Massachusetts 02108-1512

                             ARTICLES OF AMENDMENT
                   (GENERAL LAWS, CHAPTER 156B, SECTION 72)
- --------
Name       We,           George W. Chamillard             ,  *President
Approved      --------------------------------------------

           and           Donald G. Leka                   , *Assistant Clerk,
              --------------------------------------------

           of            Teradyne, Inc.                   ,
              --------------------------------------------
                    (Exact name of corporation)

           located at    321 Harrison Avenue, Boston, Massachusetts  02118    ,
                     ---------------------------------------------------------
                         (Street address of corporation in Massachusetts)

           certify that these Articles of Amendment affecting articles numbered:

                                     Article 3
           --------------------------------------------------------------------
               (Number those articles 1, 2, 3, 4, 5 and/or 6 being amended)

           of the Articles of Organization were duly adopted at a meeting held 
           on May 23, 1996, by vote of:

           
                                                               

           63,652,370    shares of           Common Stock          of  71,452,818   shares outstanding,
           -------------            ------------------------------     -----------
                                    (type, class & series, if any)

                         shares of                                 of               shares outstanding, and
           -------------            ------------------------------     -----------
                                    (type, class & series, if any

                         shares of                                 of               shares outstanding,
           -------------            ------------------------------     -----------
                                    (type, class & series, if any
           
              
C     [ ]  (1) ** being at least a majority of each type, class or series 
           outstanding and entitled to vote thereon: 

P     [ ]
           * Delete the inapplicable words.   ** Delete the inapplicable clause.
           (1) For amendments adopted pursuant to Chapter 156B, Section 70.
M     [ ]  (2) For amendments adopted pursuant to Chapter 156B, Section 71.
           NOTE: IF THE SPACE PROVIDED UNDER ANY ARTICLE OR ITEM ON THIS FORM IS
           INSUFFICIENT, ADDITIONS SHALL BE SET FORTH ON ONE SIDE ONLY OF 
R.A.  [ ]  SEPARATE 8 1/2 X 11 SHEETS OF PAPER WITH A LEFT MARGIN OF AT LEAST 
           1 INCH. ADDITIONS TO MORE THAN ONE ARTICLE MAY BE MADE ON A SINGLE 
           SHEET SO LONG AS EACH ARTICLE REQUIRING EACH ADDITION IS CLEARLY 
           INDICATED.

- ----------
P.C.


   2

To change the number of shares and the par value (if any) of any type, class or
series of stock which the corporation is authorized to issue, fill in the
following:

The total presently authorized is:



- --------------------------------------------------------------------------------------
    WITHOUT PAR VALUE STOCKS                      WITH PAR VALUE STOCKS
- --------------------------------------------------------------------------------------
  TYPE         NUMBER OF SHARES          TYPE         NUMBER OF SHARES      PAR VALUE
- --------------------------------------------------------------------------------------
                                                                    
Common:                                Common:          125,000,000          $0.125
- --------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------
Preferred:                             Preferred:
- --------------------------------------------------------------------------------------

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

Change the total authorized to:
- --------------------------------------------------------------------------------------
    WITHOUT PAR VALUE STOCKS                      WITH PAR VALUE STOCKS
- --------------------------------------------------------------------------------------
  TYPE         NUMBER OF SHARES          TYPE         NUMBER OF SHARES      PAR VALUE
- --------------------------------------------------------------------------------------
Common:                                Common:          250,000,000          $0.125
- --------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------
Preferred:                             Preferred:
- --------------------------------------------------------------------------------------

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






   3












The foregoing amendment(s) will become effective when these Articles of
Amendment are filed in accordance with General Laws, Chapter 156B, Section 6
unless these articles specify, in accordance with the vote adopting the
amendment, a later effective date not more than thirty days after such filing,
in which event the amendment will become effective on such later date.

Later effective date: ___________________.
                     

SIGNED UNDER THE PENALTIES OF PERJURY, this 31 day of July, 1996,
                                        

/s/ George Chamillard     
- --------------------------------
George Chamillard
*President


/s/ Donald G. Leka        
- --------------------------------
Donald G. Leka
*Assistant Clerk

* Delete the inapplicable words.



   4

                        THE COMMONWEALTH OF MASSACHUSETTS

                              ARTICLES OF AMENDMENT
                    (GENERAL LAWS, CHAPTER 156B, SECTION 72)



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

                    I hereby approve the within Articles of
                    Amendment and, the filing fee in the amount
                    of $ 125,000 having been paid, said articles
                    are deemed to have been filed with me this
                    31st day of July 1996.


                    Effective date: ____________________________
                     

                              /s/ William F. Galvin
                              ---------------------------------
                              WILLIAM FRANCIS GALVIN
                              Secretary of the Commonwealth




                         TO BE FILLED IN BY CORPORATION
                      PHOTOCOPY OF DOCUMENT TO BE SENT TO:

                         Kevin M. Barry, Esq.
                    --------------------------------------------
                         Testa, Hurwitz & Thibeault, LLP
                         125 High Street
                    --------------------------------------------

                         Boston, Ma 02110
                    --------------------------------------------




   5



                                                          FEDERAL IDENTIFICATION
                                                                  NO. 04-2272148
                                                            --------------------

- --------
Examiner              THE COMMONWEALTH OF MASSACHUSETTS

                            WILLIAM FRANCIS GALVIN
                         Secretary of the Commonwealth
             One Ashburton Place, Boston, Massachusetts 02108-1512


                             ARTICLES OF AMENDMENT
                   (GENERAL LAWS, CHAPTER 156B, SECTION 72)
- --------
Name       We,           Owen W. Robbins                  , *Vice President
Approved      --------------------------------------------

           and           Donald G. Leka                   , *Assistant Clerk,
              --------------------------------------------

           of            Teradyne, Inc.                   ,
              --------------------------------------------
                    (Exact name of corporation)

           located at    321 Harrison Avenue, Boston, Massachusetts  02118    ,
                     ---------------------------------------------------------
                         (Street address of corporation in Massachusetts)

           certify that these Articles of Amendment affecting articles numbered:

                                     Article 3
           --------------------------------------------------------------------
               (Number those articles 1, 2, 3, 4, 5 and/or 6 being amended)

           of the Articles of Organization were duly adopted at a meeting held 
           on May 24, 1995, by vote of:

           
                                                               

           26,581,818    shares of           Common Stock          of  37,173,315   shares outstanding,
           -------------            ------------------------------     -----------
                                    (type, class & series, if any)

                         shares of                                 of               shares outstanding, and
           -------------            ------------------------------     -----------
                                    (type, class & series, if any

                         shares of                                 of               shares outstanding,
           -------------            ------------------------------     -----------
                                    (type, class & series, if any
           
              
C     [ ]  (1) ** being at least a majority of each type, class or series 
           outstanding and entitled to vote thereon:/

P     [ ]
           * Delete the inapplicable words.   ** Delete the inapplicable clause.
           (1) For amendments adopted pursuant to Chapter 156B, Section 70.
M     [ ]  (2) For amendments adopted pursuant to Chapter 156B, Section 71.
           NOTE: IF THE SPACE PROVIDED UNDER ANY ARTICLE OR ITEM ON THIS FORM IS
           INSUFFICIENT, ADDITIONS SHALL BE SET FORTH ON ONE SIDE ONLY OF 
R.A.  [ ]  SEPARATE 8 1/2 X 11 SHEETS OF PAPER WITH A LEFT MARGIN OF AT LEAST 
           1 INCH. ADDITIONS TO MORE THAN ONE ARTICLE MAY BE MADE ON A SINGLE 
           SHEET SO LONG AS EACH ARTICLE REQUIRING EACH ADDITION IS CLEARLY 
           INDICATED.

- ----------
P.C.


   6

To change the number of shares and the par value (if any) of any type, class or
series of stock which the corporation is authorized to issue, fill in the
following:

The total presently authorized is:



- --------------------------------------------------------------------------------------
    WITHOUT PAR VALUE STOCKS                      WITH PAR VALUE STOCKS
- --------------------------------------------------------------------------------------
  TYPE         NUMBER OF SHARES          TYPE         NUMBER OF SHARES      PAR VALUE
- --------------------------------------------------------------------------------------
                                                                    
Common:                                Common:          75,000,000          $0.125
- --------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------
Preferred:                             Preferred:
- --------------------------------------------------------------------------------------

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

Change the total authorized to:
- --------------------------------------------------------------------------------------
    WITHOUT PAR VALUE STOCKS                      WITH PAR VALUE STOCKS
- --------------------------------------------------------------------------------------
  TYPE         NUMBER OF SHARES          TYPE         NUMBER OF SHARES      PAR VALUE
- --------------------------------------------------------------------------------------
Common:                                Common:          125,000,000          $0.125
- --------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------
Preferred:                             Preferred:
- --------------------------------------------------------------------------------------

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






   7

The foregoing amendment(s) will become effective when these Articles of
Amendment are filed in accordance with General Laws, Chapter 156B, Section 6
unless these articles specify, in accordance with the vote adopting the
amendment, a later effective date not more than thirty days after such filing,
in which event the amendment will become effective on such later date.

Later effective date: ___________________.
                     

SIGNED UNDER THE PENALTIES OF PERJURY, this 14th day of July, 1995,
                                        

/s/ Owen W. Robbins      
- ---------------------------------------
Owen W. Robbins
*Executive Vice President



/s/ Donald G. Leka            
- ---------------------------------------
Donald G. Leka
*Assistant Clerk



* Delete the inapplicable words.




   8
                        THE COMMONWEALTH OF MASSACHUSETTS

                              ARTICLES OF AMENDMENT
                    (GENERAL LAWS, CHAPTER 156B, SECTION 72)



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

                    I hereby approve the within Articles of
                    Amendment and, the filing fee in the amount
                    of $50,000.00 having been paid, said articles
                    are deemed to have been filed with me this
                    17th day of July 1995.


                     

                              /s/ William F. Galvin
                              ---------------------------------
                              WILLIAM FRANCIS GALVIN
                              Secretary of the Commonwealth




                         TO BE FILLED IN BY CORPORATION
                      PHOTOCOPY OF DOCUMENT TO BE SENT TO:

                         Kevin M. Barry, Esq.
                    --------------------------------------------
                         Testa, Hurwitz & Thibeault
                         53 State Street, Exchange Place
                    --------------------------------------------

                         Boston, Ma 02109
                    --------------------------------------------







   9

                                                         Federal Identification
                                                               No.   04-2272148
                                                                  -------------
                                                                   Fee: $250.00
- -----------
Examiner                THE COMMONWEALTH OF MASSACHUSETTS

                             Michael Joseph Connolly
                               Secretary of State
                One Ashburton Place, Boston, Massachusetts 02108

            ARTICLES OF MERGER OF PARENT AND SUBSIDIARY CORPORATIONS
                     (General Laws Chapter 156B, Section 82)

            We,  Owen W. Robbins AND William B. Asher, Jr.   Vice President* and
- -----------      --------------------------------------------           
Name
Approval    Assistant Clerk of         Teradyne, Inc.
                              --------------------------------------------------

            organized under the laws of MASSACHUSETTS and herein called the 
            parent corporation, do hereby certify as follows:

            1.   That the subsidiary corporation(s) to be merged into the parent
            corporation  are as follows:

                 NAME           STATE OF ORGANIZATION      DATE OF ORGANIZATION

            AIDA Corporation           California                 6/15/84

            Zehntel, Inc.              Delaware                   10/24/75

            2.   That the parent corporation owns at least ninety percent of the
            outstanding shares of each class of the stock of each subsidiary 
            corporation to be merged into the parent corporation.

            3.   That in the case of each of the above-named corporations the 
            laws of the state of its organization, if other than Massachusetts, 
            permit the merger herein provided for and that all action required 
            under the laws of each such state in connection with this merger has
            been duly taken. (If all the corporations are organized under the 
            laws of Massachusetts and if General Laws, Chapter 156B is 
            applicable to them, then Paragraph 3 may be deleted.)

            * Delete the inapplicable words. In case the parent corporation is 
            organized under the laws of a state other than Massachusetts, these 
            articles are to be signed by officers having corresponding powers 
            and duties.
C     [ ]
         
         
P     [ ]
         
         
M     [ ]
         
         
R.A.  [ ]




- -----------
P.C.


   10
4.   That at a meeting of the directors of the parent corporation, the following
vote, pursuant to General Laws, Chapter 156B, Section 82, was duly adopted:





                             See Continuation Sheets




























NOTE: Votes for which the space provided above is not sufficient should be set
out on continuation sheets to be numbered 2A, 2B, etc. Continuation sheets must
have a left-hand margin 1 inch wide for binding. Only one side should be used.





   11


5.   The effective date of the merger shall be the date approved and filed by
the Secretary of the Commonwealth. If a later effective date is desired, specify
such date, which shall not be more than thirty days after the date of filing:

     IN WITNESS WHEREOF and under the penalties of perjury we have hereto signed
our names this 27th day of DECEMBER, 1989.




                                      /s/ Owen W. Robbins 
                                      -----------------------------------
                                      Owen W. Robbins
                                      Vice President  
  

                                      /s/ William B. Asher 
                                      -----------------------------------
                                      William B. Asher 
                                      Assistant Clerk  





* Delete the inapplicable words. In case the parent corporation is organized
under the laws of a state other than Massachusetts, these articles are to be
signed by officers having corresponding powers and duties.



   12



                               Continuation Sheet

                           MERGER OF AIDA CORPORATION

VOTED:          That the Agreement and Plan of Merger in the form attached
                hereto, providing for the merger of the Corporation's
                wholly-owned subsidiary, AIDA Corporation, with and into the
                corporation, with the Corporation constituting the surviving
                corporation, be, and hereby is, approved, with such changes
                therein or additions thereto as the officers executing the same
                shall approve, such approval to be evidenced conclusively by
                their execution and delivery thereof; and that the President or
                any Vice-President and Clerk or Assistant Clerk of the
                Corporation be, and they hereby are, authorized and empowered to
                execute and deliver the Agreement and Plan of Merger on behalf
                of the Corporation.

VOTED:          That the President or any Vice-President and the Clerk or
                Assistant Clerk of the Corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Certificate of Ownership in the
                form attached hereto, with the office of the Secretary of State
                for the State of California.

VOTED:          At or after the effective date of the merger of AIDA Corporation
                with and into the Corporation, all debts, liabilities and duties
                of AIDA Corporation shall attach to the Corporation and may be
                enforced against the Corporation to the same extent as if such
                debts, liabilities and duties had been incurred or contracted by
                the Corporation.

VOTED:          That the president or any Vice President and the Clerk or
                Assistant Clerk of the Corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Articles of Merger in the form
                attached hereto, with the office of the Secretary of State of
                Massachusetts.

VOTED:          That the effective date of such foregoing merger is and shall be
                January 1, 1990

VOTED:          That the proper officers of the Corporation be, and each of them
                singly hereby is, authorized and empowered to execute and
                deliver such documents, instruments and certificates, make any
                payments and to take all actions as in his judgment may be
                necessary, desirable or appropriate in order to effectuate the
                intent and purposes of the foregoing resolutions.



   13


                                      Continuation Sheet

                                   Merger of Zehntel, Inc.

VOTED:          That the Agreement and Plan of Merger in the form attached
                hereto, providing for the merger of the Corporation's
                wholly-owned subsidiary, Zehntel, Inc. with and into the
                corporation, with the Corporation constituting the surviving
                corporation, be, and hereby is, approved, with such changes
                therein or additions thereto as the officers executing the same
                shall approve, such approval to be evidenced conclusively by
                their execution and delivery thereof; and that the President or
                any Vice-President and Clerk or Assistant Clerk of the
                Corporation be, and they hereby are, authorized and empowered to
                execute and deliver the Agreement and Plan of Merger on behalf
                of the Corporation.

VOTED:          That the President or any Vice-President and the clerk or
                Assistant clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Certificate of Ownership and
                Merger in the form attached hereto, with the office of the
                Secretary of State for the State of Delaware and a certified
                copy thereof in the office of the Recorder of Deeds of New
                Castle County in accordance with the General Corporation Law of
                the State of Delaware.

VOTED:          That the President or any Vice-President and the Clerk of
                Assistant Clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Articles of Merger in the form
                attached as hereto, with the office of the Secretary of State of
                Massachusetts and a certified copy thereof in the Registry of
                Deeds in accordance with the Business Corporation Law of
                Massachusetts.

VOTED:          That the effective date of such foregoing merger is and shall be
                January 1, 1990.

VOTED:          That the proper officers of the Corporation be, and each of them
                singly hereby is, authorized and empowered to execute and
                deliver such documents, instruments and certificates, make any
                payments and to take all actions as in his judgment may be
                necessary, desirable or appropriate in order to effectuate the
                intent and purposes of the foregoing resolutions.



   14


                        THE COMMONWEALTH OF MASSACHUSETTS



            ARTICLES OF MERGER OF PARENT AND SUBSIDIARY CORPORATIONS

                    (GENERAL LAWS, CHAPTER 156B, SECTION 82)


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

            I hereby approve the within Articles of Merger of Parent
            and Subsidiary Corporations and, the filing fee in the
            amount of $250.00, having been paid, said articles are
            deemed to have been filed with me this 28th day of
            DECEMBER, 1989

                              Effective date:1/1/90



                           /s/ Michael Joseph Connolly
                           ------------------------------------
                           MICHAEL JOSEPH CONNOLLY
                           Secretary of State



                         TO BE FILLED IN BY CORPORATION
                      Photocopy of document to be sent to:





                              Leslie S. White, Esq.
                        ---------------------------------
                          c/o Testa Hurwitz & Thibeault
                        ---------------------------------
                         53 State Street, Exchange Place
                        ---------------------------------
                                Boston, MA 02109
                        ---------------------------------
                            Telephone: (617) 367-7500
                        ---------------------------------


   15
                                                         Federal Identification
                                                               No.   04-2272148
                                                                  -------------
                                                                   Fee: $250.00
- -----------
Examiner                THE COMMONWEALTH OF MASSACHUSETTS

                             Michael Joseph Connolly
                               Secretary of State
                One Ashburton Place, Boston, Massachusetts 02108

            ARTICLES OF MERGER OF PARENT AND SUBSIDIARY CORPORATIONS
                     (General Laws Chapter 156B, Section 82)

            We,  Owen W. Robbins and William B. Asher, Jr.   Vice President* and
- -----------      --------------------------------------------           
Name
Approval    Assistant Clerk of         Teradyne, Inc.
                              --------------------------------------------------

            organized under the laws of MASSACHUSETTS and herein called the 
            parent corporation, do hereby certify as follows:

            1.   That the subsidiary corporation(s) to be merged into the parent
            corporation  are as follows:

                 NAME               STATE OF ORGANIZATION   DATE OF ORGANIZATION

            CASE Technology, Inc.   California              1/21/83
            Teradyne Central, Inc.  Delaware                12/15/72
            Teradyne Connection     Massachusetts           10/16/68
            Systems, Inc. 

            2.   That the parent corporation owns at least ninety percent of the
            outstanding shares of each class of the stock of each subsidiary 
            corporation to be merged into the parent corporation.

            3.   That in the case of each of the above-named corporations the 
            laws of the state of its organization, if other than Massachusetts, 
            permit the merger herein provided for and that all action required 
            under the laws of each such state in connection with this merger has
            been duly taken. (If all the corporations are organized under the 
C     [ ]   laws of Massachusetts and if General Laws, Chapter 156B is 
            applicable to them, then Paragraph 3 may be deleted.)
          
P     [ ] 
            * Delete the inapplicable words. In case the parent corporation is 
            organized under the laws of a state other than Massachusetts, these 
M     [ ]   articles are to be signed by officers having corresponding powers 
            and duties.
          
R.A.  [ ] 




- -----------
P.C.




   16

4.      That at a meeting of the directors of the parent corporation, the
following vote, pursuant to General Laws, Chapter 156B, Subsection (a) was duly
adopted:




                             See Continuation Sheets

5.      The effective date of the merger as specified in the vote set out under
paragraph 4 is



                             See Continuation Sheets



        IN WITNESS WHEREOF and under the penalties of perjury we have hereto
signed our names this 27th day of December, 1989.



                                      /s/ Owen W. Robbins 
                                      ----------------------------
                                      Owen W. Robbins             
                                      Vice President              
                                                                  
                                                                  
                                      /s/ William B. Asher        
                                      ----------------------------
                                      William B. Asher            
                                      Assistant Clerk




* Delete the inapplicable words. In case the parent corporation is organized
under the laws of a state other than Massachusetts, these articles are to be
signed by officers having corresponding powers and duties.



   17


                        THE COMMONWEALTH OF MASSACHUSETTS

            ARTICLES OF MERGER OF PARENT AND SUBSIDIARY CORPORATIONS

                    (GENERAL LAWS, CHAPTER 156B, SECTION 82)

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

            I hereby approve the within articles of merger of parent
            and subsidiary corporations and, the filing fee in the
            amount of $250.00, having been paid, said articles are
            deemed to have been filed with me this 28th day of
            December, 1989


                        Effective date: December 31, 1989

                           /s/ Michael Joseph Connolly
                           ---------------------------------------
                           MICHAEL JOSEPH CONNOLLY
                           Secretary of State



                         TO BE FILLED IN BY CORPORATION
                      Photocopy of document to be sent to:



                              Leslie S. White, Esq.
                         c/o Testa, Hurwitz & Thibeault
                         53 State Street, Exchange Place
                                Boston, MA 02109

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

                            Telephone: (617) 367-7500



   18


                               Continuation Sheet

                        MERGER OF TERADYNE CENTRAL, INC.

VOTED:          That the Agreement and Plan of Merger in the form attached
                hereto, providing for the merger of the corporation's
                wholly-owned subsidiary, Teradyne Central, Inc., with and into
                the corporation, with the Corporation constituting the surviving
                corporation, be, and hereby is, approved, with such changes
                therein or additions thereto as the officers executing the same
                shall approve, such approval to be evidenced conclusively by
                their execution and delivery thereof; and that the President or
                any Vice-President and Clerk or assistant Clerk of the
                Corporation be, and they hereby are, authorized and empowered to
                execute and deliver the Agreement and Plan of Merger on behalf
                of the Corporation.

VOTED:          That the President or any Vice-President and the clerk or
                Assistant clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Certificate of Ownership and
                Merger in the form attached hereto, with the office of the
                Secretary of State for the State of Delaware and a certified
                copy thereof in the office of the Recorder of Deeds of New
                Castle County in accordance with the General Corporation Law of
                the State of Delaware.

VOTED:          That the President or any Vice-President and the Clerk of
                Assistant Clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Articles of Merger in the form
                attached as hereto, with the office of the Secretary of State of
                Massachusetts and a certified copy thereof in the Registry Of
                Deeds in accordance with the Business Corporation Law of
                Massachusetts.

VOTED:          That the effective date of such foregoing merger is and shall be
                December 31, 1989.

VOTED:          That the proper officers of the Corporation be, and each of them
                singly hereby is, authorized and empowered to execute and
                deliver such documents, instruments and certificates, make any
                payments and to take all actions as in his judgment may be
                necessary, desirable or appropriate in order to effectuate the
                intent and purposes of the foregoing resolutions.



   19


                               Continuation Sheet

                   MERGER OF TERADYNE CONNECTION SYSTEMS, INC.


VOTED:          That the Agreement and Plan of Merger in the form attached
                hereto, providing for the merger of the Corporation's
                wholly-owned subsidiary, Teradyne Connection Systems, Inc. with
                and into the Corporation, with the Corporation constituting the
                surviving corporation, be, and hereby is, approved, with such
                changes therein or additions thereto as the officers executing
                the same shall approve, such approval to be evidenced
                conclusively by their execution and delivery thereof; and that
                the President or any Vice-President and Clerk or Assistant Clerk
                of the corporation be, and they hereby are, authorized and
                empowered to execute and deliver the Agreement and Plan of
                Merger on behalf of the Corporation.

VOTED:          That the President or any Vice-President and the Clerk or
                Assistant Clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Certificate of Ownership and
                Merger in the form attached hereto, with the office of the
                Secretary of State of State of Massachusetts and a certified
                copy thereof in the office of the Registry of Deeds of in
                accordance with the General Corporation Law of Massachusetts.

VOTED:          That the effective date of such foregoing merger is and shall be
                December 31, 1989.

VOTED:          That the proper officers of the Corporation be, and each of them
                singly hereby is, authorized and empowered to execute and
                deliver such documents, instruments and certificates, make any
                payments and to take all actions as in his judgment may be
                necessary, desirable or appropriate in order to effectuate the
                intent and purposes of the foregoing resolutions.



   20


                                      Continuation Sheet

                                MERGER OF CASE TECHNOLOGY INC.



VOTED:          That the Agreement and Plan of Merger in the form attached
                hereto, providing for the merger of the Corporation's
                wholly-owned subsidiary, CASE Technology Inc., with and into the
                Corporation, with the corporation constituting the surviving
                corporation, or additions thereto as the officers executing the
                same shall approve, such approval to be evidenced conclusively
                by their execution and delivery thereof; and that the President
                or any Vice-President and Clerk or Assistant Clerk of the
                Corporation be, and they hereby are, authorized and empowered to
                execute and deliver the Agreement and Plan of Merger on behalf
                of the Corporation.

VOTED:          That the President or any Vice-President and the clerk or
                Assistant clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Certificate of Ownership and
                Merger in the form attached hereto, with the office of the
                Secretary of State for the State of California.

VOTED:          At and after the effective date of the merger of CASE Technology
                Inc. with and into the Corporation, all debts, liabilities and
                duties of CASE Technology Inc. shall attach to the Corporation
                and may be enforced against the Corporation to the same extent
                as if such debts, liabilities and duties had been incurred or
                contracted by the Corporation.

VOTED:          That the President or any Vice-President and the Clerk of
                Assistant Clerk of the corporation be, and hereby are,
                authorized and empowered to execute, acknowledge and file on
                behalf of the Corporation, the Articles of Merger in the form
                attached as hereto, with the office of the Secretary of State of
                Massachusetts and a certified copy thereof in the Registry of
                Deeds in accordance with the Business Corporation Law of
                Massachusetts.

VOTED:          That the effective date of such foregoing merger is and shall be
                December 31, 1989.

VOTED:          That the proper officers of the Corporation be, and each of them
                singly hereby is, authorized and empowered to execute and
                deliver such documents, instruments and certificates, make any
                payments and to take all actions as in his judgment may be
                necessary, desirable or appropriate in order to effectuate the
                intent and purposes of the foregoing resolutions.



   21
                        THE COMMONWEALTH OF MASSACHUSETTS

__________                   MICHAEL JOSEPH CONNOLLY         FEDERAL
Examiner                       Secretary of State            IDENTIFICATION NO.:
                              ONE ASHBURTON PLACE            04-2272148
                               BOSTON, MASS 02108


                                   ARTICLES OF
                   MERGER OF PARENT AND SUBSIDIARY CORPORATION
               PURSUANT TO GENERAL LAWS, CHAPTER 156B, SECTION 82

        The fee for filing this certificate is prescribed by General Laws,
                           Chapter 156B, Section 114.
            Make check payable to the Commonwealth of Massachusetts.

                                     * * * *

We,  Owen W. Robbins and William B. Asher,       Vice President*

and Assistant Clerk* of            Teradyne, Inc.,

organized under the laws of Massachusetts and herein called the parent
corporation, do hereby certify as follows:

        1.      That the subsidiary corporation(s) to be merged into the parent
corporation are/is as follows:

Name                             State of Organization     Date of Organization

1.  Teradyne Digitest, Inc.      Delaware                  April 14, 1978






        2.      That the parent corporation owns at least ninety per cent of the
outstanding shares of each class of the stock of each subsidiary corporation to
be merged into the parent corporation.

        3.      That in the case of each of the above-named corporations the
laws of the state of its organization, if other than Massachusetts, permit the
merger herein provided for and that all action required under the laws of each
such state in connection with this merger has been duly taken. (If all the
corporations are organized under the laws of the Massachusetts and if General
Laws, Chapter 156B is applicable to them, then Paragraph 3 may be deleted).




- ---------

*  Delete the inapplicable words. In case the parent corporation is organized
under the laws of a state other than Massachusetts these articles are to be
signed by officers having corresponding powers and duties.


   22


        4.      That at a meeting of the directors of the parent corporation the
following vote, pursuant to subsection (a) of General Laws. Chapter 156B,
Section 82, was duly adopted:

         VOTED:         That the Agreement and Plan of Merger in the form
                        attached as EXHIBIT A hereto, providing for the merger
                        of Teradyne Digitest, Inc. with and into Teradyne, Inc.,
                        with Teradyne, Inc. constituting the surviving
                        corporation, be, and hereby is, approved, with such
                        changes therein or additions thereto as the officers
                        executing the same shall approve, such approval to be
                        evidenced conclusively by their execution and delivery
                        thereof; and that the President or any Vice-President
                        and Clerk or Assistant Clerk of the Company be, and they
                        hereby are, authorized and empowered to execute and
                        deliver the Agreement and Plan of Merger on behalf of
                        Teradyne, Inc.

         VOTED:         That the President or any Vice-President and the Clerk
                        or Assistant Clerk of Teradyne, Inc. be, and hereby are,
                        authorized and empowered to execute, acknowledge and
                        file on behalf of Teradyne, Inc., the Articles of Merger
                        in the form attached as hereto, with the office of the
                        Secretary of State of Massachusetts.

         VOTED:         That the effective date of such foregoing merger is and
                        shall be December 31, 1988.

         VOTED:         That the proper officers of Teradyne, Inc. be, and each
                        of them singly hereby is, authorized and empowered to
                        execute and deliver such documents, instruments and
                        certificates, make any payments and to take all actions
                        as in his judgment may be necessary, desirable or
                        appropriate in order to effectuate the intent and
                        purposes of the foregoing resolutions.

NOTE:    Votes for which the space provided above is not sufficient should be
         set out on continuation sheets to be numbered 2A, 2B etc. Continuation
         sheets must have a left-hand margin 1 inch wide for binding. Only one
         side should be used.



   23



        5.      The effective date of the merger as specified in the vote set
out under Paragraph 4 is

                 December 31, 1988

        6.      (This Paragraph 6 may be deleted if the parent corporation is
organized under the laws of Massachusetts.) The parent corporation hereby agrees
that it may be sued in the Commonwealth of Massachusetts for any prior
obligation of any subsidiary corporation organized under the laws of
Massachusetts with which it has merged, and any obligation hereafter incurred by
the parent corporation, including the obligation created by subsection (e) of
General Laws, Chapter 156B, Section 82, so long as any liability remains
outstanding against the parent corporation in the Commonwealth of Massachusetts
and it hereby irrevocably appoints the Secretary of the Commonwealth as its
agent to accept service of process for the enforcement of any such obligations,
including taxes, in the same manner as provided in Chapter 181.

        IN WITNESS WHEREOF and under the penalties of perjury we have hereto
signed our names this 29th day of December, 1988.




                                      /s/ Owen W. Robbins
                                      ------------------------------------
                                      Owen W. Robbins
                                      Vice President*  
  
                                      /s/ William B. Asher 
                                      -------------------------------------
                                      William B. Asher   
                                      Assistant Clerk*  







*  Delete the inapplicable words. In case the parent corporation is organized
under the laws of a state other than Massachusetts these articles are to be
signed by officers having corresponding powers and duties.



   24



                          COMMONWEALTH OF MASSACHUSETTS
            ARTICLES OF MERGER OF PARENT AND SUBSIDIARY CORPORATIONS

                    (General Laws, Chapter 156B, Section 82)

        I hereby approve the within articles of merger of parent and subsidiary
corporations and, the filing fee in the amount of $200.00 having been paid, said
articles are deemed to have been filed with me this 29th day of December, 1988.



Effective Date
- --------------
December 31, 1988
- -----------------


                                               /s/ Michael Joseph Connolly
                                               --------------------------------
                                               MICHAEL JOSEPH CONNOLLY
                                               Secretary of State



TO BE FILLED IN BY CORPORATION
Photo Copy of Merger to Be Sent

TO:         Leslie S. White, Esq.
            c/o Testa, Hurwitz & Thibeault
            53 State Street
            Boston, MA 02109

Telephone:  (617) 367-7500



   25



                        THE COMMONWEALTH OF MASSACHUSETTS
- --------                                                         FEDERAL 
Examiner                                                         IDENTIFICATION
                                                                 NO. 04-2272148
                 OFFICE OF THE MASSACHUSETTS SECRETARY OF STATE
                       MICHAEL JOSEPH CONNOLLY, Secretary
                    ONE ASHBURTON PLACE, BOSTON, MASS. 02108



                              ARTICLES OF AMENDMENT

                     General Laws, Chapter 156B, Section 72

        This certificate must be submitted to the Secretary of the Commonwealth
within sixty days after the date of the vote of stockholders adopting the
amendment. The fee for filing this certificate is prescribed by General Laws,
Chapter 156B, Section 114. Make check payable to the Commonwealth of
Massachusetts.

                                    ---------

         We,      Alexander V. d'Arbeloff,  President
and
                  Richard J. Testa, Clerk  of


                                 TERADYNE, INC.
- --------------------------------------------------------------------------------
                              (Name of Corporation)

          located at 321 Harrison Avenue, Boston, Massachusetts 02118

________  do hereby certify that the following amendment to the articles of 
approved  reorganization of the corporation was duly adopted at a meeting held 
          on May 8, 1987, by vote of 

          17,740,199 shares of common stock out of 23,898,176 shares outstanding

          CROSS OUT         being at least:(1) two-thirds of each class 
          INAPPLICABLE      outstanding and entitled to vote thereon and of 
          CLAUSE            each class or series of stock whose rights are 
                            adversely affected thereby:(2)       
                          
                          

C  [ ]
P  [ ]
M  [ ]

(1) For amendments adopted pursuant to Chapter 156B, Section 70.
(2) For amendments adopted pursuant to Chapter 156B Section 71.

Note: If the space provided under any amendments or item on this form is
insufficient, additions shall be set forth on separate 8 1/2 x 11 sheets of
paper leaving a left hand margin of at least 1 inch for binding. Additions to
more than one Amendment may be continued on a single sheet so long as each
Amendment requiring each such addition is clearly indicated.



   26



TO CHANGE the number of shares and the par value, if any, of each class of stock
within the corporation fill in the following:

The total presently authorized is:

- --------------------------------------------------------------------------------
KIND OF STOCKS     NO PAR VALUE            WITH PAR VALUE
                 NUMBER OF SHARES         NUMBER OF SHARES      PAR VALUE
- --------------------------------------------------------------------------------

  COMMON 
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
PREFERRED:                            
- --------------------------------------------------------------------------------

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

CHANGE the total authorized to:

- --------------------------------------------------------------------------------
KIND OF STOCKS     NO PAR VALUE            WITH PAR VALUE
                 NUMBER OF SHARES         NUMBER OF SHARES      PAR VALUE
- --------------------------------------------------------------------------------

  COMMON 
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
PREFERRED:                            
- --------------------------------------------------------------------------------

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






   27



Article Six is hereby amended to add the following paragraph:

         "No director shall be personally liable to the Corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director
notwithstanding any provision of law imposing such liability; provided, that, to
the extent provided by applicable law, this provision shall not eliminate or
limit the liability of a director (i) for any breach of the director's duty of
loyalty to the Corporation or its stockholders, (ii) for acts or omissions not
in good faith or which involve intentional misconduct or a knowing violation of
law, (iii) under Section sixty-one or sixty-two of Chapter 156B of the
Massachusetts General Laws, or (iv) for any transaction from which the director
derived an improper personal benefit. This provision shall not eliminate the
liability of a director for any act or omission occurring prior to the date upon
which this provision becomes effective. No amendment to or repeal of this
provision shall apply to or have any effect upon the liability or alleged
liability of any director for or with respect to any acts or omissions of such
director occurring prior to such amendment or repeal."

         The foregoing amendment will become effective when these articles of
amendment are filed in accordance with Chapter 156B, Section 6 of the General
Laws unless these articles specify, in accordance with the vote adopting the
amendment, a later effective date not more than thirty days after such filing,
in which event the amendment will become effective on such later date.

IN WITNESS WHEREOF AND UNDER THE PENALTIES OF PERJURY, we have hereto signed our
names this

8th day of May, in the year 1987.


/s/ Alexander V. d'Arbeloff                 
- ---------------------------------
Alexander V. d'Arbeloff
President


/s/ Richard J. Testa                        
- ---------------------------------
Richard J. Testa  
Clerk



   28


                        THE COMMONWEALTH OF MASSACHUSETTS

                              ARTICLES OF AMENDMENT

                    (General Laws, Chapter 156B, Section 72)

                             I hereby approve the within articles
                     of amendment and, the filing fee in the
                     amount of $75.00 having been paid, said
                     articles are deemed to have been filed with
                     me this 12 day of May 1987.



                                             /s/ Michael Joseph Connolly
                                             ---------------------------------
                                             MICHAEL JOSEPH CONNOLLY
                                             Secretary of State


TO BE FILLED IN BY CORPORATION
Photo Copy of Merger to Be Sent

TO:          Richard D. Sloman, Esq.
             c/o Testa, Hurwitz & Thibeault
             53 State Street
             Boston, MA 02109

Telephone:   (617) 367-7500



   29

                        THE COMMONWEALTH OF MASSACHUSETTS
- --------                                                         FEDERAL 
Examiner                                                         IDENTIFICATION
                                                                 NO. 04-2272148
                            MICHAEL JOSEPH CONNOLLY
                               Secretary of State
                    ONE ASHBURTON PLACE, BOSTON, MASS. 02108


                        RESTATED ARTICLES OF ORGANIZATION

                     GENERAL LAWS, CHAPTER 156B, SECTION 74

          This certificate must be submitted to the Secretary of the
Commonwealth within sixty days after the date of the vote of stockholders
adopting the restated articles of organization. The fee for filing this
certificate is prescribed by General Laws, Chapter 156B, Section 114. Make check
payable to the Commonwealth of Massachusetts.

                                    ---------

We,       Alexander V. d'Arbeloff          ,President and
          Richard J. Testa                 , Clerk of

                                 TERADYNE, INC.
- --------------------------------------------------------------------------------
                              (Name of Corporation)

located at 321 Harrison Avenue, Boston Massachusetts 02118

do hereby certify that the following restatement of the articles of organization
of the corporation was duly adopted at a meeting held on May 14, 1984, by vote
of

15,720,764 shares of common stock out of 22,070,973 shares outstanding

being at least a majority of each class of stock outstanding and entitled to
vote and of each class or series of stock adversely affected thereby:-

          1.  The name by which the corporation shall be known is: -
             
              Teradyne, Inc.
             
          2.  The purposes for which the corporation is formed are as follows: -
             
              See Page 2A

C   [ ]
P   [ ]
M   [ ]
RA  [ ]

- ----------
P.C.

        Note: If the space provided under any amendments or item on this form is
        insufficient, additions shall be set forth on separate 8 1/2 x 11 sheets
        of paper leaving a left hand margin of at least 1 inch for binding.
        Additions to more than one Amendment may be continued on a single sheet
        so long as each Amendment requiring each such addition is clearly
        indicated.



   30



3.      The total number of shares and the par value, if any, of each class of
stock which the corporation is authorized to issue is as follows:

       CLASS OF STOCK     WITHOUT PAR VALUE                WITH PAR VALUE
                           NUMBER OF SHARES      NUMBER OF SHARES    PAR VALUE

         Preferred               NONE                   NONE               --
         Common                  NONE                75,000,000         $.125

*4.     If more than one class is authorized, a description of each of the
        different classes of stock with, if any, the preferences, voting powers,
        qualifications, special or relative rights or privileges as to each
        class thereof and any series now established:

        NONE

*5.     The restrictions, if any, imposed by the articles of organization upon
        the transfer of shares of stock of any class are as follows:

        NONE

*6.     Other lawful provisions, if any, for the conduct and regulation of the
        business and affairs of the corporation, for its voluntary dissolution,
        or for limiting, defining, or regulating the powers of the corporation,
        or of its directors or stockholders, or of any class of stockholders:

        The directors may make, amend or repeal the By-Laws in whole or in part,
        except with respect to any provision thereof which by law or by the
        By-Laws requires action by the stockholders.

        Meetings of the stockholders may be held anywhere in the United States.

        The corporation may be a partner in any business enterprise.


* If there are no such provisions, state "None."



   31
                                       2A



        To design, develop, manufacture, assemble, produce, acquire, own, buy,
import, sell, export, dispose of and otherwise deal in electronic or
electromechanical products or components, and personal property of every kind
and description.

        To acquire, buy, own and sell securities (including the securities of
this corporation), patents, licenses, trade marks, trade names and all rights of
every kind thereunder.

        To acquire, buy, construct, own, lease, mortgage and sell real estate,
buildings or any interests therein necessary or desirable for the purposes of
the corporation.

        To acquire all or any part of the goodwill, rights and property, and to
assume the whole or any part of the contracts or liabilities of any firm,
association, corporation or person, and to pay for such acquisition in cash,
stock or other securities of this corporation or otherwise.

        To exercise any of the foregoing purposes of powers through subsidiary
or affiliated corporations, and in connection therewith and otherwise to have
all the powers conferred now or in future by the Commonwealth of Massachusetts
upon business corporations.



   32



        * We further certify that the foregoing restated articles of
        organization effect no amendments to the articles of organization of the
        corporation as heretofore amended, except amendments to the following
        articles

        Article 3.

                   Briefly describe amendments in space below:

        Article 3 is amended by increasing the number of shares of Common Stock,
        $.125 par value, which the Corporation is authorized to issue from
        30,000,000 shares to 75,000,000 shares.









IN WITNESS WHERE AND UNDER THE PENALTIES OF PERJURY, we have hereto signed our
names this 14th day of May in the year 1984



/s/ Alexander V. d'Arbeloff                                                    
- ------------------------------------
Alexander V. d'Arbeloff
President


/s/ Richard J. Testa 
- ------------------------------------
Richard J. Testa 
Clerk



   33




                        THE COMMONWEALTH OF MASSACHUSETTS





                        RESTATED ARTICLES OF ORGANIZATION

                    (GENERAL LAWS, CHAPTER 156B, SECTION 74)

                             I hereby approve the within restated
                     articles of organization and, the filing fee
                     in the amount of $22,650.00 having been
                     paid, said articles are deemed to have been
                     filed with me this 21st day of May, 1984



                                              /s/ Michael Joseph Connolly
                                              ---------------------------------
                                              MICHAEL JOSEPH CONNOLLY
                                              Secretary of State


TO BE FILLED IN BY CORPORATION
Photo Copy of Restated Articles of Organization to Be Sent

TO:           Richard J. Testa, Esq.
              c/o Testa, Hurwitz & Thibeault
              Sixty State Street
              Boston, MA 02109

Telephone:    (617) 367-7500