1

                                                                    EXHIBIT  3.3
                                   [ANNOTATED]


                                ****************

                              AMENDED AND RESTATED
                                     BY-LAWS
                                       OF
                                 TERADYNE, INC.

                  (Amended and Restated as of January 28, 1997)

                                ****************


                                    ARTICLE I
                                    ---------
                      Name, Location, Seal and Fiscal Year
                      ------------------------------------

1.       Name.  The name of the corporation is Teradyne, Inc.
         -----  
2.       Location.   The corporation may have an office and transact business in
         ---------
Boston,  Massachusetts,  and at such  other  place  or  places  as the  Board of
Directors or stockholders may appoint.

3.       Seal.   The  seal  of  the  corporation  shall  bear the  name  of  the
         -----
corporation,  the word  Massachusetts,  the year of incorporation and such other
device or inscription  as the Board of Directors may determine.  The form of the
seal may be changed by the Board of Directors.

4.       Fiscal Year.   The  fiscal  year  of  the  corporation   shall,  unless
         ------------
otherwise  determined by the Board of  Directors,  begin on January 1 and end on
December 31.
                                   ARTICLE II
                                   ----------
                                  Stockholders
                                  ------------

1.       Annual Meeting.  The annual meeting of stockholders shall be held on
         ---------------
such date and at such time and place (within the United  States) as may be fixed
by the Board of Directors  from time to time.  The purposes for which the annual
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meeting is to be held,  in addition to those  prescribed by law, the Articles of
Organization  or these  By-Laws,  may be specified by the  Directors,  the Chief
Executive  Officer or the President.  If no annual meeting is held in accordance
with the foregoing  provisions,  a special  meeting may be held in lieu thereof,
and any action taken at such  meeting  shall have the same effect as if taken at
the annual meeting.
         Except as provided in Article III,  Section 2, the only business  which
may be  conducted at any such  meeting of the  stockholders  shall (a) have been
specified in the written notice of meeting (or any supplement  thereto) given by
or at the  direction  of the  Directors,  the  Chief  Executive  Officer  or the
President,  (b) have otherwise been properly brought before the meeting by or at
the direction of the Directors, the Chief Executive Officer or the President, or
(c) have otherwise  been properly  brought before the meeting by or on behalf of
any  stockholder  who shall have been a stockholder of record on the record date
for such  meeting and who shall  continue to be  entitled  to vote  thereat.  In
addition  to any other  applicable  requirements,  for  business  to be properly
brought  before a meeting  by a  stockholder,  the  stockholder  must have given
timely notice thereof in writing to the Clerk of the corporation.  To be timely,
a  stockholder's  notice  must be  delivered  to or mailed and  received  at the
principal  executive  offices of the corporation,  not less than fifty (50) days
nor more than ninety (90) days prior to the meeting; provided,  however, that in
the event that less than sixty-five (65) days' notice or prior public disclosure
of the  date of the  meeting  is given or made to  stockholders,  notice  by the
stockholder  to be  timely  must be so  received  not  later  than the  close of
business on the  fifteenth  day following the day on which notice of the date of
the meeting  was mailed or such  public  disclosure  was made,  whichever  first
occurs.  A  stockholder's  notice to the Clerk shall set forth as to each matter
the stockholder  proposes to bring before the meeting (i) a brief description of
the  business  desired to be brought  before the  meeting  and the  reasons  for
conducting such business at the meeting, (ii) the name and record address of the
stockholder  proposing  such  business,  (iii) the class and number of shares of
capital  stock  of the  corporation  held  of  record,  owned  beneficially  and
represented  by proxy by such  stockholder as of the record date for the meeting
(if such date shall then have been made publicly  available)  and as of the date
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of such notice by the stockholder, and (iv) all other information which would be
required to be  included  in a proxy  statement  filed with the  Securities  and
Exchange  Commission  if,  with  respect  to any  such  item of  business,  such
stockholder were a participant in a solicitation subject to Regulation 14A under
the Securities Exchange Act of 1934, as amended (the "Proxy Rules").
         Notwithstanding  anything in the By-Laws to the  contrary,  no business
shall be conducted at the meeting  except in accordance  with the procedures set
forth in this  Article II,  provided,  however,  that nothing in this Article II
shall be  deemed to  preclude  discussion  by any  stockholder  of any  business
properly brought before the meeting.
         The Chairman of the meeting may, if the facts  warrant,  determine  and
declare to the meeting that business was not properly brought before the meeting
in  accordance  with the  provisions  of this  Article  II,  and if he should so
determine,  he shall so  declare  to the  meeting  and  that  business  shall be
disregarded. [Section 1 restated March 13, 1991 and May 23, 1996.]

2.       Special Meetings.   Special meetings of  stockholders  may be called by
         -----------------
the Chief  Executive  Officer,  the  President  or by the  Directors.  A special
meeting  shall  be  called  by the  Clerk,  or in  case of the  death,  absence,
incapacity  or  refusal  of  the  Clerk,  by any  other  officer,  upon  written
application of one or more stockholders who hold at least 66-2/3% in interest of
the capital  stock  entitled to vote at a meeting (or such lesser  percentage in
interest as shall be the maximum percentage  permitted under Massachusetts law).
The call for the meeting  shall state the date,  hour and place and the purposes
of the meeting. [Section 2 restated September 14, 1989 and May 23, 1996.]

3.       Place of Meetings.    All meetings of stockholders shall be held at the
         ------------------
corporation  unless a different place (within the United States) is fixed by the
Directors, the Chief Executive Officer or the President and stated in the notice
of the meeting. [Section 3 restated May 23, 1996.]

4.       Notice  of  Meetings.   A  written    notice  of   every   meeting   of
         ---------------------
stockholders,  stating  the place,  date and hour  thereof,  and the purpose for
which the meeting is to be held, shall be given by the Clerk or by the person
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calling the  meeting at least ten days before the meeting or such longer  period
as required  by law to each  stockholder  entitled  to vote  thereat and to each
stockholder  who by law,  the  Articles  of  Organization  or these  By-Laws  is
entitled to such notice,  by leaving such notice with him or at his residence or
usual place of business,  or by mailing it postage prepaid and addressed to such
stockholder at his address as it appears upon the books of the  corporation.  No
notice need be given to any stockholder if a written waiver of notice,  executed
before  or after  the  meeting  by the  stockholder  or his  attorney  thereunto
authorized, is filed with the records of the meeting.

5.       Quorum.  The  holders of a  majority in interest of  all stock  issued,
         -------
outstanding and entitled to vote at a meeting shall  constitute a quorum,  but a
lesser number may adjourn any meeting from time to time without  further notice;
except that if two or more classes of stock are outstanding and entitled to vote
as separate classes,  then in the case of each such class a quorum shall consist
of the  holders of a majority  in  interest  of the stock of that class  issued,
outstanding and entitled to vote.

6.       Voting and Proxies.   Each   stockholder   shall have one vote for each
         -------------------
share of stock  entitled to vote held by him of record  according to the records
of the corporation  unless  otherwise  provided by the Articles of Organization.
Stockholders may vote in person or by written proxy. Proxies shall be filed with
the Clerk of the meeting, or of any adjournment thereof,  before being voted. No
proxy dated more than six months before the meeting named therein shall be valid
and no  proxy  shall be valid  after  the  final  adjournment  of such  meeting.
Notwithstanding the provisions of the preceding  sentence,  a proxy coupled with
an  interest  sufficient  in law to support  an  irrevocable  power,  including,
without limitation,  an interest in shares or in the corporation generally,  may
be made irrevocable if it so provides,  need not specify the meeting to which it
relates,  and shall be valid and enforceable until the interest  terminates,  or
for such shorter  period as may be specified in the proxy.  A proxy with respect
to stock held in the name of two or more  persons  shall be valid if executed by
one of them unless at or prior to exercise of the proxy the corporation receives
a  specific  written  notice  to the  contrary  from  any one of  them.  A proxy
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purporting to be executed by or on behalf of a stockholder shall be deemed valid
unless  challenged  at or  prior  to its  exercise  and the  burden  of  proving
invalidity shall rest on the challenger.

7.       Action at  Meeting.   When a quorum  is  present,  the   holders  of  a
         -------------------
majority  of the stock  present or  represented  and voting on a matter,  (or if
there are two or more  classes of stock  entitled to vote as  separate  classes,
then in the case of each such  class,  the holders of a majority of the stock of
that class present or represented  and voting on a matter) except where a larger
vote is required by law, the Articles of  Organization  or these By-Laws,  shall
decide  any  matter  to be  voted  on  by  the  stockholders.  Any  election  by
stockholders  shall  be  determined  by a  plurality  of the  votes  cast by the
stockholders  entitled to vote at the election.  No ballot shall be required for
such election  unless  requested by a stockholder  present or represented at the
meeting and entitled to vote in the election. The corporation shall not directly
or indirectly vote any share of its stock.

8.       Procedure  for Meeting.   The Clerk,  who may call on  any  officer  or
         -----------------------
officers  of the  corporation  for  assistance,  shall  make all  necessary  and
appropriate  arrangements  for the  meetings  of the  stockholders,  receive all
proxies,  and  ascertain  and  report  by  certificate  to each  meeting  of the
stockholders  the number of shares present in person or by proxy and entitled to
vote at such  meeting.  In the absence of the Clerk,  an  Assistant  Clerk shall
perform said duties.  The  certificate of the Clerk or an Assistant  Clerk as to
the  regularity of such proxies and as to the number of shares present in person
or by proxy and  entitled  to vote at such  meeting  shall be  received as prima
facie  evidence of the number of shares which are present in person and by proxy
and entitled to vote, for the purpose of  establishing  the presence of a quorum
at such meeting,  for the purpose of organizing such meeting,  and for all other
purposes.

9.       Inspectors.   At each meeting of  the  stockholders,  (i)  the  proxies
         -----------
shall be received and taken in charge by three inspectors,  (ii) where voting is
to be by ballot on any  question,  the polls  shall be opened and closed and the
ballots  shall be taken in charge by such  inspectors,  and (iii) all  questions
touching the qualification of voters, the validity of proxies and the acceptance
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or  rejection of votes shall be decided by such three  inspectors  or a majority
thereof.  Such inspectors may be appointed by the Board of Directors before such
meeting,  or, if no such appointment shall have been made, then by the presiding
officer  at such  meeting.  In the event for any  reason  any of the  inspectors
previously  appointed  shall fail to attend such meeting,  or being present will
not or cannot act in such capacity,  then an inspector or inspectors in place of
such inspector or inspectors  failing to attend or not acting shall be appointed
by the presiding officer.

                                   ARTICLE III
                                   -----------
                                    Directors
                                    ---------

1.       Powers.   The business of  the corporation shall be  managed by a Board
         -------
of  Directors  who may  exercise  all the  powers of the  corporation  except as
otherwise  provided by law, by the Articles of Organization or by these By-Laws.
In the event of a vacancy in the Board of Directors,  the  remaining  Directors,
except as  otherwise  provided by law, may exercise the powers of the full Board
until the vacancy is filled.

2.       Nomination and Election.   The Board of Directors  shall consist of not
         ------------------------
less than three (3) nor more than fifteen (15) persons.  The number of the Board
of Directors for each year shall be fixed by vote of a majority of the Directors
then in office.  The Board of Directors  shall be classified with respect to the
time for which they severally hold office, as provided in Section 50A of Chapter
156B of the Massachusetts  General Laws, into three classes,  as nearly equal in
number as  possible,  the term of office of those of the first  class  ("Class I
Directors") to continue until the 1990 annual meeting of stockholders  and until
their successors are duly elected and qualified,  the term of office of those of
the second  class  ("Class II  Directors")  to  continue  until the 1991  annual
meeting  of  stockholders  and  until  their  successors  are duly  elected  and
qualified,  and the term of those of the third class ("Class III  Directors") to
continue  until  the  1992  annual  meeting  of  stockholders  and  until  their
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successors  are  duly  elected  and   qualified.   At  each  annual  meeting  of
stockholders  the successors to the class of Directors whose term expires at the
meeting shall be elected to hold office for a term  continuing  until the annual
meeting  of  stockholders  held in the third  year  following  the year of their
election and until their successors shall have been duly elected and qualified.
         Only  persons  who are  nominated  in  accordance  with  the  following
procedures  shall be eligible for election as Directors.  Nominations of persons
for election to the Board of Directors at the annual  meeting may be made at the
annual meeting of stockholders by or at the direction of the Board of Directors,
by any nominating  committee or person appointed by the Board of Directors or by
any  stockholder  entitled to vote for the  election of Directors at the meeting
who complies  with the notice  procedures  set forth in this  Article III.  Such
nominations,  other  than  those  made by or at the  direction  of the  Board of
Directors,  shall be made  pursuant to timely  notice in writing to the Clerk of
the corporation.  To be timely, a stockholder's  notice shall be delivered to or
mailed and received at the principal  executive  offices of the  corporation not
less than fifty (50) days nor more than ninety  (90) days prior to the  meeting;
provided, however, that in the event that less than sixty-five (65) days' notice
of  prior  public  disclosure  of the  date of the  meeting  is given or made to
stockholders,  notice by the  stockholder  to be timely must be so received  not
later than the close of business on the fifteenth day following the day on which
such notice of the date of the meeting was mailed or such public  disclosure was
made,  whichever first occurs. Such stockholder's  notice to the Clerk shall set
forth (a) as to each  person  whom the  stockholder  proposes  to  nominate  for
election or re-election as a Director,  (i) the name, age,  business address and
residence address of the person, (ii) the principal  occupation or employment of
the person,  (iii) the  citizenship of the person,  (iv) the class and number of
shares of capital stock of the corporation  which are beneficially  owned by the
person, and (v) any other information relating to the person that is required to
be disclosed in solicitations  of proxies for election of directors  pursuant to
the Proxy Rules; and (b) as to the stockholder  giving the notice,  (i) the name
and record  address of the  stockholder,  (ii) the class and number of shares of
capital stock of the corporation which are beneficially owned by the stockholder
as of the record  date for the  meeting  (if such date shall then have been made
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publicly  available) and as of the date of such notice,  (iii) a  representation
that the  stockholder  intends to appear in person or by proxy at the meeting to
nominate the person or persons  specified in the notice,  (iv) a description  of
all arrangements or understandings between such stockholder and each nominee and
any other person or persons  (naming  such person or persons)  pursuant to which
the nomination or nominations are to be made by such stockholder, (v) such other
information  regarding  each nominee  proposed by such  stockholder  as would be
required to be included in a proxy  statement  filed pursuant to the Proxy Rules
and (vi) the consent of each  nominee to serve as a Director of the  corporation
if so elected.  The corporation may require any proposed nominee to furnish such
other  information as may reasonably be required by the corporation to determine
the eligibility of such proposed  nominee to serve as Director.  No person shall
be eligible for election as a Director  unless  nominated in accordance with the
procedures  set forth  herein.  Any  Director  who attains 72 years of age shall
immediately  retire from his or her  position as a Director of the  Corporation,
provided that this limitation shall not apply to any Director serving on January
28, 1997. [Section 2 restated January 28, 1997.]

3.       Vacancies.   Vacancies  and   newly  created   directorships,   whether
         ----------
resulting  from an  increase  in the size of the  Board of  Directors,  from the
death,  resignation,  disqualification  or removal of a Director  or  otherwise,
shall be filled  solely by the  affirmative  vote of a majority of the remaining
Directors  then in  office,  even  though  less  than a quorum  of the  Board of
Directors.  Any Director elected in accordance with the preceding sentence shall
hold  office for the  remainder  of the full term of the class of  Directors  in
which the vacancy  occurred or the new  directorship  was created and until such
Director's  successor shall have been elected and qualified.  No decrease in the
number of Directors  constituting  the Board of Directors shall shorten the term
of any incumbent Director. [Section 3 restated March 13, 1991.]

4.       Enlargement of the Board.  The number of the Board of Directors may be 
         -------------------------
increased and one or more additional  Directors elected by vote of a majority of
the Directors then in office. [Section 4 restated March 13, 1991.]
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5.       Resignation.   Any   Director  may  resign by  delivering  his  written
         ------------
resignation to the corporation at its principal office or to the Chief Executive
Officer,  President,  Clerk  or  Assistant  Clerk.  Such  resignation  shall  be
effective upon receipt unless it is specified to be effective at some other time
or upon the happeningof some other event. [Section 5 restated March 13, 1991 and
May 23, 1996.]

6.       Removal.   Any  Director  may be removed from office only (a) for cause
         --------
as defined in Section 50A of Chapter 156B of the Massachusetts  General Laws and
by the  affirmative  vote  of a  majority  of  the  shares  of  the  corporation
outstanding  and  entitled to vote in the election of Directors or (b) for cause
by vote of a majority of the Directors then in office.

7.        Meetings.  Regular  meetings of the Directors may be held without call
          ---------
or notice at such  places  and at such times as the  Directors  may from time to
time determine, provided that any Director who is absent when such determination
is made shall be given  notice of the  determination.  A regular  meeting of the
Directors  may be held  without a call or notice at the same place as the annual
meeting of stockholders,  or the special meeting held in lieu thereof, following
such meeting of stockholders.
         Special  meetings  of the  Directors  may be held at any time and place
designated in a call by the Chief Executive Officer, President, Treasurer or two
or more Directors. [Section 7 restated May 23, 1996.]

8.       Notice of Meetings.   Notice  of  all special meetings of the Directors
         -------------------
shall be given to each Director by the Clerk or Assistant  Clerk, or in the case
of the death, absence,  incapacity or refusal of such persons, by the officer or
one of the Directors calling the meeting. Notice shall be given to each Director
in person or by telephone or by telegram sent to his business or home address at
least forty-eight hours in advance of the meeting or by written notice mailed to
his  business  or home  address  at least  seventy-two  hours in  advance of the
meeting. Notice need not be given to any Director if a written waiver of notice,
executed  by him before or after the  meeting,  is filed with the records of the
meeting,  or to any Director who attends the meeting  without  protesting  prior
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thereto or at its  commencement the lack of notice to him. A notice or waiver of
notice of a Directors' meeting need not specify the purposes of the meeting.

9.       Quorum. At any meeting of the Directors,  a majority of the Directors 
         -------
then inoffice  shall  constitute  a quorum.  Less than a quorum may adjourn any 
meeting from time to time without further notice.

10.      Action at  Meeting.   At  any  meeting  of  the  Directors  at  which a
         -------------------
quorum is present,  the vote of a majority of those present,  unless a different
vote is specified by law, the Articles of Organization  or these By-Laws,  shall
be sufficient to decide such matter.

11.      Action by  Consent.    Any  action  by  the  Directors  may   be  taken
         -------------------
without a meeting if a written consent thereto is signed by all of the Directors
and filed with the records of the  Directors'  meetings.  Such consents shall be
treated as a vote of the Directors for all purposes.

12.      Committees.  The Directors may, by vote of a majority of the  Directors
         -----------
then in office, elect from their number an executive or other committees and may
by like vote delegate  thereto some or all of their powers except those which by
law, the Articles of  Organization  or these  By-Laws they are  prohibited  from
delegating.  Except as the Directors may otherwise determine, any such committee
may make rules for the conduct of its business, but unless otherwise provided by
the Directors or in such rules, its business shall be conducted as nearly as may
be in the same manner as is provided by these By-Laws for the Directors.

                                   ARTICLE IV
                                   ----------
                                    Officers
                                    --------

1.       Enumeration.    The  officers  of  the  corporation  shall consist of a
         ------------
President,  a Treasurer,  a Clerk,  and such other  officers,  including a Chief
Executive, one or more Vice-Presidents,  Assistant Treasurers,  Assistant Clerks
and Secretary as the Directors may determine. [Section 1 restated May 23, 1996.]
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2.       Election.  The President, Treasurer and Clerk shall be elected annually
         ---------
by the  Directors  at their  first  meeting  following  the  annual  meeting  of
stockholders.  Other  officers may be chosen by the Directors at such meeting or
at any other meeting.

3.       Qualification.  The  President ( and if so appointed  by  the Board of 
         --------------
Directors,  the Chief  Executive  Officer) may, but need not, be a Director.  No
officer need be a  stockholder.  Any one or more officers may be required by the
Directors  to give  bond  for the  faithful  performance  of his  duties  to the
corporation  in  such  amount  and  with  such  sureties  as the  Directors  may
determine. [Section 3 restated May 23, 1996.]

4.       Tenure.  Except as otherwise provided by law, the Articles of 
         -------
Organization  or these By-Laws,  the  President,  Treasurer and Clerk shall each
hold  office  until the first  meeting  of the  Directors  following  the annual
meeting  of  stockholders  and  thereafter  until  a  successor  is  chosen  and
qualified;  and all other  officers shall hold office until the first meeting of
the Directors  following the annual  meeting of  stockholders,  unless a shorter
term is  specified  in the vote  choosing or  appointing  them.  Any officer may
resign by delivering his written resignation to the corporation at its principal
office or to the President,  Clerk or Secretary,  and such resignation  shall be
effective upon receipt unless it is specified to be effective at some other time
or upon the happening of some other event.

5.       Removal.  The Directors may remove any officer with or without cause by
         --------
vote of a majority of the entire number of Directors  then in office;  provided,
that an officer  may be removed  for cause  only after a  reasonable  notice and
opportunity to be heard by the Board of Directors prior to action thereof.

6.       President,  Chief Executive Officer and Vice-President.   If   a  Chief
         ------------------------------------------------------- 
Executive Officer has been appointed by the Board of Directors,  he shall be the
chief executive  officer of the corporation and shall,  subject to the direction
of the Directors,  have general supervision and control of its business.  If the
Board of Directors has not appointed a Chief  Executive  Officer,  the President
shall be the chief executive  officer of the  corporation and shall,  subject to
the  direction of the  Directors,  have general  supervision  and control of its
business.  Unless  otherwise provided by the Directors, the President ( or if at
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any time there exists a Chief Executive  Officer,  the Chief Executive  Officer)
shall  preside,  when  present,  at  all  meetings  of  stockholders  and of the
Directors. [Section 6 restated May 23, 1996.]
         Any Vice-President (and the President,  if at any time there is a Chief
Executive Officer) shall have such powers as the Directors may from time to time
designate.

7.       Treasurer and Assistant Treasurers.   The  Treasurer  shall, subject to
         -----------------------------------
the direction of the Directors,  have general charge of the financial affairs of
the corporation  and shall cause to be kept accurate books of account.  He shall
have  custody  of  all  funds,   securities,   and  valuable  documents  of  the
corporation, except as the Directors may otherwise provide.

        Any  Assistant  Treasurer  shall  have such powers as the Directors may 
from time to time designate.

8.       Clerk and Assistant Clerks.   The  Clerk  shall  keep  a  record of the
         ---------------------------
meetings of stockholders.  Unless a Transfer Agent is appointed, the Clerk shall
keep or  cause  to be kept in  Massachusetts,  at the  principal  office  of the
corporation,  the stock and transfer  records of the  corporation,  in which are
contained the names and the record  addresses of all stockholders and the amount
of stock held by each.

         The Clerk shall keep a record of the meetings of the Directors.

         Any  Assistant  Clerk shall have such powers as the  Directors may from
time to time  designate.  In the  absence  of the  Clerk  from  any  meeting  of
stockholders,  an Assistant  Clerk if one be elected,  and otherwise a Temporary
Clerk  designated  by the person  presiding  at the meeting,  shall  perform the
duties of the Clerk.

9.       Other  Powers  and  Duties.   Each   officer   shall,  subject to these
         ---------------------------
By-Laws,  have in  addition to the duties and powers  specifically  set forth in
these By-Laws, such duties and powers as are customarily incident to his office,
and such duties and powers as the Directors may from time to time designate.
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                                      -13-


                                    ARTICLE V
                                    ---------
                                  Capital Stock
                                  -------------

1.       Issuance of Stock.   The  Board  of  Directors  shall have the power to
         ------------------
issue from time to time shares of the capital stock of the  corporation for such
consideration,  in such  installments,  and upon such terms as the Directors may
determine in  accordance  with the law, the  Articles of  Organization  or these
By-Laws.

2.       Certificates  of Stock.   Each   stockholder  shall  be  entitled to  a
         -----------------------
certificate  of the  capital  stock of the  corporation  in such  form as may be
prescribed from time to time by the Directors.  The certificate  shall be signed
by the Chief Executive  Officer,  the President or a Vice President,  and by the
Treasurer or an Assistant Treasurer,  but when a certificate is countersigned by
a Transfer  Agent or a Registrar  other than a Director,  officer or employee of
the corporation,  such signatures may be facsimiles. In case any officer who has
signed or whose facsimile  signature has been placed on such  certificate  shall
have ceased to be such  officer  before such  certificate  is issued,  it may be
issued by the corporation with the same effect as if he were such officer at the
time of its issue.
         Every  certificate  for  shares  of  stock  which  are  subject  to any
restriction on transfer pursuant to the Articles of Organization,  these By-Laws
or any agreement to which the corporation is a party, shall have the restriction
noted  conspicuously  on the certificate and shall also set forth on the face or
back either the full text of the  restriction or a statement of the existence of
such restriction and a statement that the corporation will furnish a copy to the
holder of such  certificate  upon  written  request  and without  charge.  Every
certificate  issued when the  corporation  is  authorized to issue more than one
class or series of stock  shall  set forth on its face or back  either  the full
text of the preferences,  voting powers, qualifications and special and relative
rights of the  shares  of each  class and  series  authorized  to be issued or a
statement  of the  existence of such  preferences,  powers,  qualifications  and
   14
                                      -14-

rights,  and a statement that the corporation will furnish a copy thereof to the
holder of such certificate upon written request and without charge.

3.       Transfers.   Subject to the restrictions,  if  any,  stated or noted on
         ----------
the stock  certificates,  shares of stock may be transferred on the books of the
corporation  by the surrender to the  corporation  or its Transfer  Agent of the
certificate  therefor properly  endorsed or accompanied by a written  assignment
and power of attorney properly executed, with necessary transfer stamps affixed,
and with such proof of the  authenticity  of signature as the corporation or its
Transfer Agent may reasonably  require.  Except as may be otherwise  required by
law, the Articles of  Organization or these By-Laws,  the  corporation  shall be
entitled to treat the record  holder of stock as shown on its books as the owner
of such stock for all purposes, including the payment of dividends and the right
to vote  with  respect  thereof,  regardless  of any  transfer,  pledge or other
disposition of such stock,  until the shares have been  transferred on the books
of the corporation in accordance with the requirements of these By-Laws.
         It shall be the duty of each  stockholder to notify the  corporation or
its Transfer Agent of his post office address.

4.       Transfer  Agent and  Registrar.   The   Directors   shall have power to
         -------------------------------
appoint  one or  more  Transfer  Agents  and  Registrars  for the  transfer  and
registration of  certificates of stock of any class,  and may require that stock
certificates  shall  be  countersigned  and  registered  by one or  more of such
Transfer  Agents  and  Registrars.  The  resolutions  adopted  by the  Board  of
Directors,  appointing and conferring the powers, rights, duties and obligations
of the Transfer  Agent or  Registrar,  or both,  shall  allocate and delimit the
power  to  make  original  issue  and  transfer  of  the  capital  stock  of the
corporation,  shall specify whether stockholders shall give notice of changes of
their  addresses to the Transfer Agent or the Registrar,  and shall allocate and
impose the duty of maintaining  the original stock ledgers or transfer books, or
both, of the corporation,  and of disclosing the names of the stockholders,  the
number of shares  held by each,  by kinds and  classes,  and the address of each
stockholder  as it appears  upon the  records of the  corporation.  Stockholders
shall be responsible for notifying the Transfer Agent or Registrar,  as the case
   15
                                      -15-

may be, in writing,  of any changes in their  addresses  from time to time,  and
failure so to do will  relieve  the  corporation,  its  stockholders,  officers,
Directors,  Transfer  Agent and  Registrar,  of liability  for failure to direct
notices,  dividends, or other documents or property to an address other than the
one appearing upon the records of the Transfer  Agent or Registrar,  as the case
may be, who is the agent  specified in such a resolution as the agent to receive
notices of changes of address.

5.       Lost, Stolen or Destroyed Certificates.   The  corporation  may issue a
         ---------------------------------------
new certificate for shares of stock in the place of any certificate  theretofore
issued  and  alleged to have been lost,  stolen or  destroyed,  but the Board of
Directors may require the owner of such lost,  stolen or destroyed  certificate,
or his legal  representative,  to furnish  affidavit  as to such loss,  theft or
destruction, and to give a bond in such form and substance, and with such surety
or sureties,  with fixed or open  penalty,  as it may direct,  to indemnify  the
corporation  and the Transfer  Agent or Registrar  against any claim that may be
made on account of the alleged loss, theft or destruction of such certificate.

6.       Record  Date.   The  Directors  may  fix  in advance a time of not more
         -------------
than sixty days preceding the date of any meeting of  stockholders,  or the date
for  the  payment  of  any  dividend  or  the  making  of  any  distribution  to
stockholders,  or the last day on which the  consent or dissent of  stockholders
may be effectively expressed for any purpose, as the record date for determining
the  stockholders  having the right to notice of and to vote at such meeting and
any adjournment  thereof,  or the right to receive such dividend or distribution
or the right to give such consent or dissent.  In such case only stockholders of
record on such record date shall have such right,  notwithstanding  any transfer
of stock on the books of the corporation  after the record date.  Without fixing
such record date the Directors  may for any of such purposes  close the transfer
books for all or any part of such period.

7.       Reacquisition of Stock.   Shares  of stock previously issued which have
         -----------------------
been reacquired by the corporation, may be restored to the  status of
authorized  Articles of Organization. but unissued shares by vote of the  Board
of Directors ,without amendment of the Articles of Organization.
        
   16
                                      -16-

                                   ARTICLE VI
                                   ----------

                      Protection of Directors and Officers
                      ------------------------------------

1.       Contracts and Transactions  with Interested  Directors and Officers.
         --------------------------------------------------------------------
         
         If the corporation  enters  into  contracts or  other transactions with
one or more of its Directors and officers or with any corporation,  partnership,
association,  trust,  or other  organization  with which any of its Directors or
officers are directly or indirectly  connected,  such contracts or  transactions
shall  not be  invalidated  or in any way  affected  by the  fact  that any such
Director or officer has or may have any  interest  therein  which is or might be
adverse to the  interests of the  corporation,  even though the vote or votes of
the  Director or Directors  having such  interest  shall have been  necessary to
obligate the corporation under or in such contract or transaction, nor shall any
such Director or officer, corporation,  partnership, association, trust or other
organization be liable to account to this corporation for any profit realized by
him  or  such  corporation,   partnership,   association,   or  trust  or  other
organization  from or through any such  transaction or contract by reason of the
fact  that he or such  corporation,  partnership,  association,  trust  or other
organization  with which such  Director  or officer is  directly  or  indirectly
connected was  interested in such  transaction or contract;  provided,  however,
that in every  such  case the fact of such  interest  and all  material  matters
concerning   same  shall  be  disclosed  to  other   Directors  or  stockholders
authorizing such contract or transaction.

2.       Indemnification.   (a)  Each   Director,   officer,  employee and other
         ----------------
agent of the corporation, and any person who, at the request of the corporation,
serves as a director,  officer,  employee or other agent of another organization
in which the corporation  directly or indirectly owns shares or of which it is a
creditor  shall be  indemnified  by the  corporation  against any cost,  expense
(including  attorneys'  fees),   judgment,   liability  and/or  amount  paid  in
settlement  reasonably  incurred by or imposed upon him in  connection  with any
action,  suit or proceeding  (including any proceeding before any administrative
or  legislative  body or agency),  which he may be made a party to or  otherwise
   17
                                      -17-

involved with or with which he shall be threatened,  by reason of his being,  or
related to his status as, a  Director,  officer,  employee or other agent of the
corporation or of any other  organization in which the  corporation  directly or
indirectly  owns shares or of which the  corporation is a creditor,  which other
organization  he serves or has served as  director,  officer,  employee or other
agent at the request of the  corporation  (whether or not he  continues to be an
officer,  Director,  employee  or other agent of the  corporation  or such other
organization  at the  time  such  action,  suit  or  proceeding  is  brought  or
threatened),   unless  such   indemnification  is  prohibited  by  the  Business
Corporation  Law of the  Commonwealth of  Massachusetts.  The foregoing right of
indemnification  shall be in addition to any rights to which any such person may
otherwise  be  entitled  and shall  inure to the  benefit  of the  executors  or
administrators  of each  such  person.  The  corporation  may  pay the  expenses
incurred by any such person in  defending  a civil or criminal  action,  suit or
proceeding  in  advance  of the  final  disposition  of such  action,  suit,  or
proceeding,  upon receipt of an undertaking by such person to repay such payment
if it is  determined  that  such  person  is  not  entitled  to  indemnification
hereunder.  This section  shall be subject to amendment or repeal only by action
of the stockholders.
         (b) The Board of Directors may, without stockholder approval, authorize
the  corporation  to  enter  into   agreements,   including  any  amendments  or
modifications  thereto,  with any of its  Directors,  officers or other  persons
described in paragraph (a) above providing for  indemnification  of such persons
to the maximum  extent  permitted  under  applicable  law and the  corporation's
Articles of Organization and By-Laws. [Section 2(b) added May 8, 1987.]

                                   ARTICLE VII
                                   -----------

                            Miscellaneous Provisions
                            ------------------------ 

1.       Execution of Instruments.   All deeds, leases, transactions, contracts,
         -------------------------
bonds,  notes and other  obligations  authorized to be executed by an officer of
the  corporation in its behalf shall be signed by the Chief  Executive  Officer,
   18
                                      -18-

the  President or the  Treasurer  except as the  Directors  may  generally or in
particular cases otherwise determine. [Section 1 restated May 23, 1996.]

2.       Voting  of  Securities.   Except   as   the   Directors  may  otherwise
         ----------------------- 
designate,  the Chief  Executive  Officer,  the President or Treasurer may waive
notice of, and appoint any person or persons to act as proxy or attorney in fact
for this  corporation  (with or without power of substitution) at any meeting of
stockholders  or  shareholders  of any other  corporation or  organization,  the
securities of which may be held by this corporation.
[Section 2 restated May 23, 1996.]

3.       Corporate Records.  The  original,  or attested copies, of the Articles
         ------------------
of Organization,  By-Laws and records of all meetings of the  incorporators  and
stockholders,  and the stock and transfer records, which shall contain the names
of all stockholders and the record address and the amount of stock held by each,
shall be kept in Massachusetts at the principal office of the corporation, or at
an office of its  Transfer  Agent or of the Clerk.  Said copies and records need
not all be kept in the same office.  They shall be  available at all  reasonable
times to the  inspection of any  stockholder  for any proper  purpose but not to
secure a list of  stockholders  for the  purpose of selling  said list or copies
thereof  or of using the same for a purpose  other than in the  interest  of the
applicant, as a stockholder, relative to the affairs of the corporation.

4.        Articles of Organization.   All  references  in  these  By-Laws to the
          -------------------------
Articles  of  Organization   shall  be  deemed  to  refer  to  the  Articles  of
Organization of the corporation, as amended and in effect from time to time.

5.        Amendments.   These  By-Laws may be amended or repealed in whole or in
          -----------
part  at any  annual  or  special  meeting  of the  stockholders  by a vote of a
majority of the stock  present  and  entitled  to vote,  provided  notice of the
proposed  amendment  or  repeal  shall  have  been  given in the  notice of such
meeting.  In addition,  the Directors may amend or repeal these By-Laws in whole
or in part,  except with  respect to any  provision  thereof  which by law,  the
Articles of Organization or these By-Laws  requires action by the  stockholders.
Any  By-Law  adopted  by  the  Directors  may  be  amended  or  repealed  by the
stockholders in the manner hereinabove in this Article set forth. Not later than
   19
                                      -19-

the time of giving  notice of the meeting of  stockholders  next  following  the
amending or repealing by the Directors of any By-Law, notice thereof stating the
substance of such change shall be given to all stockholders  entitled to vote on
amending these By-Laws. [Section 5 restated March 13, 1991.]

6.       The provisions of Chapter 110D of the Massachusetts General Laws as in
effect from time to time shall not apply to control  share  acquisitions  of the
corporation. [Section 6 added July 14, 1988.]

Amended and Restated November 12, 1986

Amended May 8, 1987

Amended July 14, 1988

Amended September 14, 1989

Amended and Restated March 13, 1991

Amended and Restated May 23, 1996

Amended and Restated January 28, 1997