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                                                                  EXHIBIT 10.5

                                 TERADYNE, INC.

                        1991 EMPLOYEE STOCK OPTION PLAN

                   (Amended and Restated as of May 27, 1993)


        1.  PURPOSE.  This 1991 Employee Stock Option Plan (the "Plan") is
intended to provide incentives (a) to the employees of Teradyne, Inc. (the
"Company"), its parent (if any) and any present or future subsidiaries of the
Company (collectively, "Related Corporations") by providing them with
opportunities to purchase stock in the Company pursuant to options which
qualify as "incentive stock options" under Section 422 of the Internal Revenue
Code of 1986, as amended (the "Code"), granted hereunder ("ISO" or "ISOs"); and
(b) to directors, employees and consultants of the Company and Related
Corporations by providing them with opportunities to purchase stock in the
Company pursuant to non-statutory stock options granted hereunder ("NSO" or
"NSOs").  Both ISOs and NSOs are referred to hereafter individually as an
"Option" and collectively as "Options."  As used herein, the terms "parent" and
"subsidiary" mean "parent corporation" and "subsidiary corporation" as those
terms are defined in Section 425 of the Code.

        2. Administration of the Plan. 
           --------------------------

           A. BOARD OR COMMITTEE ADMINISTRATION.  The Plan shall be administered
        by the Board of Directors of the Company (the "Board") or by a 
        committee appointed by the Board (the "Committee"); PROVIDED, that 
        to the extent required by Rule 16b-3 of the Securities and Exchange 
        Commission ("Rule 16b-3") under the Securities and Exchange Act of 
        1934, as amended (the "1934 Act"), with respect to specific grants of 
        Options, the Plan shall be administered by a disinterested 
        administrator or administrators within the meaning of Rule 16b-3. 
        Hereinafter all references in this Plan to the "Committee" shall mean
        the Board if no Committee has been appointed.  Subject to ratification
        of the grant of each Option by the Board (if so required by applicable
        state law), and subject to the terms of the Plan, the Committee shall
        have the authority to (i) determine the employees of the Company and
        Related Corporations (from among the class of employees eligible under
        paragraph 3 to receive ISOs) to whom ISOs may be granted, and to
        determine the individuals and entities (from among the class of
        individuals and entities eligible under paragraph 3 to receive NSOs) to
        whom NSOs may be granted; (ii) determine the time or times at which
        Options may be granted; (iii) determine the option price of shares
        subject to each Option; (iv) determine whether each Option granted
        shall be an ISO or a NSO; (v) determine (subject to paragraph 7) the
        time or times when each Option shall become exercisable and the
        duration of the exercise period;

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   (vi) determine whether restrictions such as repurchase
   options are to be imposed on shares subject to Options, and
   the nature of such restrictions if any, and (vii) interpret
   the Plan and prescribe and rescind rules and regulations
   relating to it.  The interpretation and construction by the
   Committee of any provisions of the Plan or of any Option
   granted under it shall be final unless otherwise determined
   by the Board.  The Committee may from time to time adopt such
   rules and regulations for carrying out the Plan as it may
   deem best.  No member of the Board or the Committee shall be
   liable for any action or determination made in good faith
   with respect to the Plan or any Option granted under it.

   3.  ELIGIBLE EMPLOYEES AND OTHERS.  ISOs may be granted to
any employee of the Company or any Related Corporation.  NSOs may
be granted to any employee, consultant or director of the Company
or any Related Corporation; PROVIDED, that no Option may be
granted hereunder to any non-employee director.  Granting of any
Option to any individual or entity shall neither entitle that
individual or entity to, nor disqualify him from, participation
in any other grant of Options.

   4.  STOCK.  The stock subject to Options shall be authorized
but unissued shares of Common Stock of the Company, par value
$.125 per share (the "Common Stock"), or shares of Common Stock
reacquired by the Company in any manner.  The aggregate number of
shares which may be issued pursuant to the Plan is 6,000,000,
subject to adjustment as provided in paragraph 13.  If any Option
granted under the Plan shall expire or terminate for any reason
without having been exercised in full or shall cease for any
reason to be exercisable in whole or in part, the unpurchased
shares subject thereto shall again be available for grants of
Options under the Plan.

   5.  GRANTING OF OPTIONS.  Options may be granted under the
Plan at any time after March 13, 1991 and prior to March 13,
2001.  The date of grant of an Option under the Plan will be the
date specified by the Committee at the time it grants the Option,
provided, however, that such date shall not be prior to the date
on which the Committee acts to approve the grant.  The Committee
shall have the right, with the consent of the optionee, to
convert an ISO granted under the Plan to a NSO pursuant to
paragraph 16.

   6.  Minimum Option Price; ISO Limitations.
       -------------------------------------

       A.  PRICE FOR NSOs.  The price per share specified in the 
   agreement relating to each NSO granted under the Plan shall in 
   no event be less than the minimum legal consideration therefor 
   required under the laws of the Commonwealth of Massachusetts.
   Not more than 200,000 NSOs may be granted under the Plan for less 
   than "fair market value" (as hereinafter defined).

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            B.  PRICE FOR ISOs.  The price per share specified in the
        agreement relating to each ISO granted under the Plan shall not be less 
        than the fair market value per share of Common Stock on the date of
        such grant.  In the case of an ISO to be granted to an employee owning
        stock possessing more than ten percent of the total combined voting     
        power of all classes of stock of the Company or any Related
        Corporation, the price per share specified in the agreement relating to
        such ISO shall not be less than 110 percent of the fair market value of
        Common Stock on the date of grant. 
                                                                         
            C.  $100,000 ANNUAL LIMITATION ON ISOs.  Each eligible employee 
        may be granted ISOs only to the extent that, in the aggregate under
        this Plan and all incentive stock option plans of the Company and
        any Related  Corporation, such ISOs do not become exercisable for the
        first time by such employee during any calendar year in a manner which
        would entitle the employee to purchase more than $100,000 in fair
        market value (determined at the time the ISOs were granted) of Common
        Stock in that year.  Any options granted to an employee in excess of
        such amount will be granted as Non-Qualified Options.     
                                                                         
            D.  DETERMINATION OF FAIR MARKET VALUE.  If, at the time an Option 
        is granted under the Plan, the Company's Common Stock is publicly
        traded, "fair market value" shall be determined as of the date such
        Option is granted and shall mean (i) the average (on that date) of the  
        high, low and closing prices of the Common Stock on the principal
        national securities exchange on which the Common Stock is traded, if
        the Common Stock is then traded on a national securities exchange; or
        (ii) the last reported sale price (on that date) of the Common Stock on
        the NASDAQ National Market List, if the Common Stock is not then traded
        on a national securities exchange; or (iii) the closing bid price (or
        average of bid prices) last quoted (on that date) by an established
        quotation service for over-the-counter securities, if the Common Stock
        is not reported on the NASDAQ National Market List.  However, if the
        Common Stock is not publicly traded at the time an Option is granted
        under the Plan, "fair market value" shall be deemed to be the fair
        value of the Common Stock as determined by the Committee after taking
        into consideration all factors which it deems appropriate, including,
        without limitation, recent sale and offer prices of the Common Stock in
        private transactions negotiated at arm's length.
                                                               
        7.  OPTION DURATION.  Subject to earlier termination as provided  in
paragraphs 9 and 10, each Option shall expire on the date specified by the
Committee, but not more than (i) ten years and one day from the date of grant
in the case of NSOs, (ii) ten years from the date of grant in the case of ISOs
generally, and

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(iii) five years from the date of grant in the case of ISOs
granted to an employee owning stock possessing more than ten
percent of the total combined voting power of all classes of
stock of the Company or any Related Corporation.  Subject to
earlier termination as provided in paragraphs 9 and 10, the term
of each ISO shall be the term set forth in the original
instrument granting such ISO, except with respect to any part of
such ISO that is converted into a NSO pursuant to paragraph 16.
                           
     8.  EXERCISE OF OPTION.  Subject to the provisions of
paragraphs 9 through 12, each Option granted under the Plan shall
be exercisable as follows: 
                           
         A.  VESTING.  The Option shall either be fully exercisable 
     on the date of grant or shall become exercisable thereafter in 
     such installments as the Committee may specify.
                           
        B.   FULL VESTING OF INSTALLMENTS.  Once an installment becomes 
     exercisable it shall remain exercisable until expiration or 
     termination of the Option, unless otherwise specified by the 
     Committee.
                           
        C.   PARTIAL EXERCISE.  Each Option or installment may be 
     exercised at any time or from time to time, in whole or in part, 
     for up to the total number of shares with respect to which it is 
     then exercisable.
                           
        D.   ACCELERATION OF VESTING.  The Committee shall have the right 
     to accelerate the date of exercise of any installment of any Option;
     PROVIDED, that the Committee shall not, without the consent of the
     optionee, accelerate the exercise date of any installment of any Option
     granted to any employee as an ISO (and not previously converted into
     a NSO pursuant to paragraph 16) if such acceleration would violate the
     annual vesting limitation contained in Section 422 of the Code, as
     described in paragraph 6(C).
                           
     9. TERMINATION OF EMPLOYMENT.  If an optionee ceases to be employed by
the Company and all Related Corporations other than by reason of death or
disability as defined in paragraph 10, no further installments of his Options
shall become exercisable, and his Options shall terminate after the passage of
90 days from the date of termination of his employment; PROVIDED, that the
Committee may specify that NSOs may remain exercisable for more than 90 days
from the date of termination of employment; PROVIDED, FURTHER, that in no event
shall any Option or part or installment thereof become or remain exercisable
after its specified expiration date.  Employment shall be considered as
continuing uninterrupted during any bona fide leave of absence (such as those
attributable to illness, military obligations or governmental service) provided
that the period of such leave does not exceed 90 days or, if longer, any period
during which such optionee's right to reemployment is guaranteed by statute.  A

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bona fide leave of absence with the written approval of the Committee shall
not be considered an interruption of employment under the Plan, provided that
such written approval contractually obligates the Company or any Related
Corporation to continue the employment of the optionee after the approved
period of absence. Options granted under the Plan shall not be affected by any
change of employment within or among the Company and Related Corporations, so
long as the optionee continues to be an employee of the Company or any Related
Corporation.  Nothing in the Plan shall be deemed to give any grantee of any
Option the right to be retained in employment or other service by the Company
or any Related Corporation for any period of time.

        Notwithstanding anything to the contrary contained above, in the case
of normal retirement, NSOs granted to an optionee shall remain exercisable
until the date which is the earlier of (i) the NSOs' specified expiration date
or (ii) 90 days from the date upon which such optionee becomes employed by a
competitor of the Company, to the extent of the number of shares which have
vested prior to and during such period.  The Committee shall have the absolute
discretion to determine whether and as of what date any optionee is employed by
a competitor of the Company.

        10.  Death; Disability.
             -----------------

             A.  DEATH.  If an optionee ceases to be employed by the
        Company and all Related Corporations by reason of his death, any Option
        of his may be exercised, to the extent of the number of shares with     
        respect to which he has theretofore been granted options (whether or
        not such options have vested in accordance with their terms) by his
        estate, personal representative or beneficiary who has acquired the
        Option by will or by the laws of descent and distribution, (i) in the
        case of ISOs, at any time prior to the earlier of the ISOs' specified
        expiration date or 180 days from the date of the optionee's death or
        (ii) in the case of NSOs, at any time prior to the earlier of the NSO's
        specified expiration date or one year from the date of the optionee's
        death.

             B.  DISABILITY.  If an optionee ceases to be employed by the 
        Company and all Related Corporations by reason of his disability, any
        Option theretofore granted to such optionee shall remain exercisable
        until the date which is (i) in the case of ISOs, the earlier of the
        ISOs' specified expiration date or 180 days from the date of the
        termination of the optionee's employment or (ii) in the case of NSOs,
        the earlier of the NSOs' specified expiration date or 33 months from
        the date of the termination of the optionee's employment, to the
        extent of the number of shares (a) which, in the case of ISOs, have
        vested prior to and during the period specified in clause (i) and (b)
        which, in the case of NSOs, have vested prior to and during the period
        which is 30 months from the date the optionee ceases to be employed by

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        the Company.  For the purposes of this Plan, the term "disability"
        shall mean "permanent and total disability" as defined in Section
        22(e)(3) of the Code or any successor statute.

        11.  ASSIGNABILITY.  No Option shall be assignable or transferable by 
the optionee except by will or by the laws of descent and distribution, and
during the lifetime of the optionee each Option shall be exercisable only 
by him.

        12.  TERMS AND CONDITIONS OF OPTIONS.  Options shall be evidenced by
instruments (which need not be identical) in such forms as the Committee may
from time to time approve.  Such instruments shall conform to the terms and
conditions set forth in paragraphs 6 through 11 hereof and may contain such
other provisions as the Committee deems advisable which are not inconsistent
with the Plan, including restrictions applicable to shares of Common Stock
issuable upon exercise of Options.  The Committee may from time to time confer
authority and responsibility on one or more of its own members and/or one or
more officers of the Company to execute and deliver such instruments.  The
proper officers of the Company are authorized and directed to take any and all
action necessary or advisable from time to time to carry out the terms of such
instruments.

        13.  ADJUSTMENTS.  Upon the occurrence of any of the following events,
an optionee's rights with respect to Options granted to him hereunder shall be
adjusted as hereinafter provided, unless otherwise specifically provided in the
written agreement between the optionee and the Company relating to such Option:

             A.  STOCK DIVIDENDS AND STOCK SPLITS.  If the shares of Common 
        Stock shall be subdivided or combined into a greater or smaller number
        of shares or if the Company shall issue any shares of Common Stock as a
        stock dividend on its outstanding Common Stock, the number of shares of
        Common Stock deliverable upon the exercise of Options shall be
        appropriately increased or decreased proportionately, and appropriate
        adjustments shall be made in the purchase price per share to reflect
        such subdivision, combination or stock dividend.

             B.  CONSOLIDATIONS OR MERGERS.  If the Company is to be 
        consolidated with or acquired by another entity in a merger, sale of
        all or substantially all of the Company's assets or otherwise (an
        "Acquisition"), the Committee or the board of directors of any entity
        assuming the obligations of the Company hereunder (the "Successor
        Board"), shall, as to outstanding Options, either (i) make appropriate
        provision for the continuation of such Options by substituting on an
        equitable basis for the shares then subject to such Options
        the consideration payable with respect to the outstanding

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        shares of Common Stock in connection with the Acquisition; or (ii) upon
        written notice to the optionees, provide that all Options must be
        exercised, to the extent then exercisable, within a specified number of
        days of the date of such notice, at the end of which period the Options
        shall terminate; or (iii) terminate all Options in exchange for a cash
        payment equal to the excess of the fair market value of the shares
        subject to such Options (to the extent then exercisable) over the
        exercise price thereof.

                C.  RECAPITALIZATION OR REORGANIZATION.  In the event of a
        recapitalization or reorganization of the Company (other than a
        transaction described in subparagraph B above) pursuant to which
        securities of the Company or of another corporation are issued with
        respect to the outstanding shares of Common Stock, an optionee upon
        exercising an Option shall be entitled to receive for the purchase
        price paid upon such exercise the securities he would have received if
        he had exercised his Option prior to such recapitalization or
        reorganization.

                D.  MODIFICATION OF ISOs.  Notwithstanding the foregoing, any
        adjustments made pursuant to subparagraphs A, B or C with respect to
        ISOs shall be made only after the Committee, after consulting with
        counsel for the Company, determines whether such adjustments would
        constitute a "modification" of such ISOs (as that term is defined in
        Section 425 of the Code) or would cause any adverse tax consequences
        for the holders of such ISOs.  If the Committee determines that such
        adjustments made with respect to ISOs would constitute a modification
        of such ISOs, it may refrain from making such adjustments.

                E.  DISSOLUTION OR LIQUIDATION.  In the event of the proposed
        dissolution or liquidation of the Company, each Option will terminate
        immediately prior to the consummation of such proposed action or at
        such other time and subject to such other conditions as shall be
        determined by the Committee.

                F.  ISSUANCES OF SECURITIES.  Except as expressly provided
        herein, no issuance by the Company of shares of stock of any class, or
        securities convertible into shares of stock of any class, shall affect,
        and no adjustment by reason thereof shall be made with respect to, the
        number or price of shares subject to Options.  No adjustments shall be
        made for dividends paid in cash or in property other than securities of
        the Company.

                G.  FRACTIONAL SHARES.  No fractional shares shall be issued
        under the Plan and the optionee shall receive from the Company cash in
        lieu of such fractional shares.

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                H.  ADJUSTMENTS.  Upon the happening of any of the events
        described in subparagraphs A, B or C above, the class and aggregate
        number of shares set forth in paragraph 4 hereof that are subject to
        Options which previously have been or subsequently may be granted under
        the Plan shall also be appropriately adjusted to reflect the events
        described in such subparagraphs.  The Committee or the Successor Board
        shall determine the specific adjustments to be made under this
        paragraph 13 and, subject to paragraph 2, its determination shall be
        conclusive.

        If any person or entity owning restricted Common Stock obtained by
exercise of an Option receives shares or securities or cash in connection with
a corporate transaction described in subparagraphs A, B or C above as a result
of owning such restricted Common Stock, such shares or securities or cash shall
be subject to all of the conditions and restrictions applicable to the 
restricted Common Stock with respect to which such shares or securities or cash
were issued, unless otherwise determined by the Committee or the Successor
Board.

        14.  MEANS OF EXERCISING OPTIONS.  An Option (or any part or
installment thereof) shall be exercised by giving written notice to the Company
at its principal office address.  Such notice shall identify the Option being
exercised and specify the number of shares as to which such Option is being
exercised, accompanied by full payment of the purchase price therefor either
(a) in United States dollars in cash or by check, or (b) at the discretion of
the Committee, through delivery of shares of Common Stock having fair market
value equal as of the date of the exercise to the cash exercise price of the
Option, or (c) at the discretion of the Committee in exceptional cases, by
delivery of the optionee's personal recourse note bearing interest payable not
less than annually at no less than 100% of the lowest applicable Federal rate,
as defined in Section 1274(d) of the Code, or (d) at the discretion of the
Committee, by any combination of (a), (b) and (c) above.  If the Committee
exercises its discretion to permit payment of the exercise price of an ISO by
means of the methods set forth in clauses (b) or (c) of the preceding sentence,
such discretion shall be exercised in writing at the time of the grant of the
ISO in question. Alternatively, payment may be made in whole or in part in
shares of the Common Stock of the Company already owned by the person or
persons exercising the option or shares subject to the option being exercised
(subject to such restrictions and guidelines as the Board may adopt from time
to time), or consistent with applicable law, through the delivery of an
assignment to the Company of a sufficient amount of the proceeds from the sale
of the Common Stock acquired upon exercise of the option and an authorization
to the broker or selling agent to pay that amount to the Company, which sale
shall be at the participant's direction at the time of exercise.  The holder of
an Option shall not have the rights of a shareholder with respect to the shares

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covered by his Option until the date of issuance of a stock certificate to him
for such shares.  Except as expressly provided above in paragraph 13 with
respect to changes in capitalization and stock dividends, no adjustment shall   
be made for dividends or similar rights for which the record date is before the
date such stock certificate is issued.

        15.  TERM AND AMENDMENT OF PLAN.  This Plan was adopted by the Board on
March 13, 1991, and shall expire on the end of the day on March 13, 2001
(except as to Options outstanding on that date).  The Board may at any time
terminate the Plan or make such modification or amendment thereof as it deems
advisable, PROVIDED, however, that the Board may not, without approval by the
affirmative vote of the holders of a majority of the securities of the Company
present, or represented, and entitled to vote at a meeting duly held in
accordance with the applicable laws of the state in which the Company is
incorporated, (i) materially increase the benefits accruing to participants
under the Plan; (ii) increase the number of shares for which options may be
granted under the Plan; or (iii) materially modify the requirements as to
eligibility for participation in the Plan. Termination or any modification or
amendment of the Plan shall not, without consent of a participant, affect his
rights under an option previously granted to him.

        16.  CONVERSION OF ISOs INTO NSOs; TERMINATION OF ISOS.  The Committee,
with the written approval of any optionee, may in its discretion take such
actions as may be necessary to convert such optionee's ISOs (or any
installments of portions of installments thereof) that have not been exercised
on the date of conversion into NSOs at any time prior to the expiration of such
ISOs, regardless of whether the optionee is an employee of the Company or a
Related Corporation at the time of such conversion.  Such actions may include,
but not be limited to, extending the exercise period or reducing the exercise
price of the appropriate installments of such Options.  At the time of such
conversion, the Committee (with the consent of the optionee) may impose such
conditions on the exercise of the resulting NSOs as the Committee in its
discretion may determine, provided that such conditions shall not be
inconsistent with this Plan.  Nothing in the Plan shall be deemed to give any
optionee the right to have such optionee's ISOs converted into NSOs, and no
such conversion shall occur until and unless the Committee takes appropriate
action. The Committee, with the consent of the optionee, may also terminate any
portion of any ISO that has not been exercised at the time of such termination.

        17.  APPLICATION OF FUNDS.  The proceeds received by the Company from
the sale of shares pursuant to Options granted under the Plan shall be used for
general corporate purposes.

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        18.  GOVERNMENTAL REGULATION.  The Company's obligation to sell and
deliver shares of Common Stock under this Plan is subject to the approval of
any governmental authority required in connection with the authorization,
issuance or sale of such shares.

        19.  WITHHOLDING OF ADDITIONAL INCOME TAXES.  Upon the exercise of a
NSO, the making of a Disqualifying Disposition (as defined in paragraph 20) or
the vesting of restricted Common Stock acquired on the exercise of an Option,
the Company, in accordance with Section 3402(a) of the Code, may require the
optionee to pay additional withholding taxes in respect of the amount that is
considered compensation includible in such person's gross income.  The
Committee in its discretion may condition (i) the exercise of an Option or (ii)
the vesting of restricted Common Stock acquired by exercising an Option, on the
optionee's payment of such additional withholding taxes.

        20.  NOTICE TO COMPANY OF DISQUALIFYING DISPOSITION.  Each employee who
receives ISOs shall agree to notify the Company in writing immediately after
the employee makes a disqualifying disposition of any Common Stock received
pursuant to the exercise of an ISO (a "Disqualifying Disposition"). 
Disqualifying Disposition means any disposition (including any sale) of such
stock before the later of (a) two years after the employee was granted the ISO
under which he acquired such stock, or (b) one year after the employee acquired
such stock by exercising such ISO.  If the employee has died before such stock
is sold, these holding period requirements do not apply and no Disqualifying
Disposition will thereafter occur.

        21.  GOVERNING LAWS; CONSTRUCTION.  The validity and construction of
the Plan and the instruments evidencing Options shall be governed by the laws
of the Commonwealth of Massachusetts.  In construing this Plan, the singular
shall include the plural and the masculine gender shall include the feminine
and neuter, unless the context otherwise requires.