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                                                                   EXHIBIT 10.29

                    FOURTH AMENDMENT TO FORBEARANCE AGREEMENT


         This Fourth Amendment to Forbearance Agreement and Amendment is entered
into as of August 4, 1997 by and between

         BankBoston, N.A., formerly known as The First National Bank of Boston
         (hereinafter, the "BANK"), a national banking association, having a
         principal place of business at 100 Federal Street, Boston,
         Massachusetts;

         BancBoston Leasing Inc. (hereinafter, "BBL"), a
         Massachusetts corporation having a principal place of
         business at 100 Federal Street, Boston, Massachusetts;

         Centennial Technologies, Inc. (hereinafter, the "BORROWER"),
         a corporation organized under the laws of the State of
         Delaware, having a principal place of business at 7 Lopez
         Road, Wilmington, Massachusetts; and

         NCT, Inc. (hereinafter, "NCT"), a corporation organized under the laws
         of the Commonwealth of Massachusetts, having a principal place of
         business at 7 Lopez Road, Wilmington, Massachusetts

in consideration of the mutual covenants herein contained and benefits to be
derived herefrom.

                                   WITNESSETH:

         1.       BACKGROUND.  On March 18, 1997, the Bank, BBL, and the
                  Obligors entered into a certain Forbearance Agreement
                  and Amendment with respect to the Obligors' obligations
                  under the Loan Agreement, their respective Guaranties
                  and the Master Lease Agreement, which Forbearance
                  Agreement and Amendment was amended by a First
                  Amendment to Forbearance Agreement dated as of
                  April 18, 1997, by a Second Amendment to Forbearance
                  Agreement dated as of June 4, 1997 and by a Third
                  Amendment to Forbearance Agreement dated June 26, 1997
                  (collectively, the "ORIGINAL AGREEMENT").  Century
                  Electronics Manufacturing, Inc. and Design Circuits,
                  Inc. have recently entered into refinancing
                  arrangements as a result of which the Bank and BBL have
                  released them from their guaranties of the Obligations
                  and have released all liens in their respective assets.
                  The Bank, BBL and the remaining Obligors desire to
                  modify the Original Agreement on the terms set forth
                  herein.


         2.       DEFINITIONS.  All capitalized terms used herein and not
                  otherwise defined shall have the same meaning herein as
                  in the Original Agreement.
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         3.       OUTSTANDING OBLIGATIONS.

                  (a)      The Borrower and NCT (individually, each an "OBLIGOR"
                           and collectively, the "OBLIGORS") acknowledge and
                           agree that they are jointly and severally obligated
                           to the Bank to pay the Obligations and that as of
                           August 4, 1997, the Obligations consist of:

                           Principal:                              $1,489,542.55
                           Interest through August 4, 1997:        $    2,075.69

                           plus interest hereafter accruing, costs, and
                           expenses, including, without limitation, reasonable
                           attorneys' fees, consultants' fees, and commercial
                           finance examination fees.

                  (b)      The Borrower acknowledges and agrees that it is
                           obligated to BBL, and that SCHEDULE 1 hereto
                           accurately reflects the amounts necessary (as of
                           July 31, 1997, with the final figures to be
                           updated by BBL prior to final payment), to pay all
                           obligations under the Master Lease Agreement and
                           schedules thereto, which are presently owned by
                           BBL.

                  (c)      The Obligors further acknowledge and agree that
                           none of them have any offsets, defenses, or
                           counterclaims (i) against the Bank with respect to
                           the Loan Agreement, the Guaranties , the other
                           Loan Documents, or otherwise, or (ii) against BBL
                           with respect to the Master Lease Agreement, or
                           otherwise, and to the extent that any such
                           offsets, defenses or counterclaims may exist, the
                           Obligors each hereby WAIVE and RELEASE same.  The
                           Obligors shall execute and deliver to the Bank and
                           BBL such releases as the Bank or BBL may request
                           to confirm the foregoing.

                  (d)      The Obligors each ratify and confirm that their
                           respective obligations to the Bank (as modified
                           hereby), including, without limitation, those under
                           the Loan Agreement and the Guaranties, are secured by
                           the Collateral and the assets of NCT.

                  (e)      The Borrower ratifies and confirms that its
                           obligations to BBL are secured by the Collateral.


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         4.       EXTENSION OF FORBEARANCE PERIOD

                  The provisions of Section 4 of the Original Agreement are
         hereby amended by deleting the date July 31, 1997 appearing in clause
         (i) and substituting the date August 15, 1997 in its stead.

         5.       GENERAL.

                  (a)      This Agreement shall be binding upon each Obligor and
                           such Obligor's successors, and assigns and shall
                           enure to the benefit of BBL, the Bank and BBL's and
                           the Bank's successors and assigns. In the event that
                           BBL or the Bank assigns or transfers its rights under
                           this Agreement, the assignee shall thereupon succeed
                           to and become vested with all rights, powers,
                           privileges, and duties of BBL or the Bank hereunder
                           and BBL or the Bank shall thereupon be discharged and
                           relieved from its duties and obligations hereunder.

                  (b)      Any determination that any provision of this
                           Agreement or any application thereof is invalid,
                           illegal, or unenforceable in any respect in any
                           instance shall not affect the validity, legality, or
                           enforceability of such provision in any other
                           instance, or the validity, legality, or enforce
                           ability of any other provision of this Agreement.

                  (c)      No delay or omission by BBL or the Bank in exercising
                           or enforcing any of BBL's or the Bank's rights and
                           remedies shall operate as, or constitute, a waiver
                           thereof. No waiver by BBL or the Bank of any of BBL's
                           or the Bank's rights and remedies on any one occasion
                           shall be deemed a waiver on any subsequent occasion,
                           nor shall it be deemed a continuing waiver.

                  (d)      This Agreement and all other documents, instruments,
                           and agreements executed in connection herewith
                           incorporate all discussions and negotiations between
                           the Obligors, BBL and the Bank, either express or
                           implied, concerning the matters included herein and
                           in such other instruments, any custom, usage, or
                           course of dealings to the contrary notwithstanding.
                           No such discussions, negotiations, custom, usage, or
                           course of dealings shall limit, modify, or other wise
                           affect the provisions hereof. No modification,
                           amendment, or waiver of any provision of this
                           Agreement or of any provision of any other agreement
                           between any Obligor and BBL or the Bank


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                           shall be effective unless executed in writing by the
                           party to be charged with such modification, amendment
                           and waiver, and if such party be BBL or the Bank,
                           then by a duly authorized officer thereof.

                  (e)      Except as modified hereby, all terms and conditions
                           of the Original Agreement, the Master Lease
                           Agreement, Loan Agreement, the Guaranties, and other
                           Loan Documents remain in full force and effect.
                           Without limiting the foregoing, the parties
                           acknowledge that the Forbearance Period will expire,
                           unless sooner terminated, on August 15, 1997. The
                           Bank and BBL are not hereby waiving any Defaults,
                           Events of Default or rights and remedies which exist
                           under the Master Lease Agreement or the Loan
                           Documents and the Bank and BBL reserve the right upon
                           expiration of the Forbearance Period to undertake
                           such action as a result of such Defaults and Events
                           of Default as the Bank or BBL may determine. In
                           particular, without limiting the generality of the
                           foregoing, the Bank and BBL have not waived any
                           Defaults or Events of Default, or the respective
                           rights and remedies of the Bank and/or BBL arising as
                           a result thereof, which may have occurred as a result
                           of any misrepresentation made by or on behalf of any
                           one or more of the Obligors.

                  (f)      This Agreement and all rights and obligations
                           hereunder, including matters of construction,
                           validity, and performance, shall be governed by the
                           laws of The Commonwealth of Massachusetts. The
                           Obligors each submit to the jurisdiction of the
                           Courts of said Commonwealth for all purposes with
                           respect to this Agreement and the Obligors'
                           relationship with the Bank and BBL.

                  (g)      Each Obligor makes the following waiver knowingly,
                           voluntarily, and intentionally, and understands
                           that the Bank and BBL, in entering into the within
                           Forbearance Agreement, is relying thereon.  EACH
                           OBLIGOR, TO THE EXTENT OTHERWISE ENTITLED THERETO,
                           HEREBY IRREVOCABLY WAIVES ANY PRESENT OR FUTURE
                           RIGHT OF THAT OBLIGOR TO A JURY IN ANY TRIAL OF
                           ANY CASE OR CONTROVERSY IN WHICH THE BANK OR BBL
                           IS OR BECOMES A PARTY (WHETHER SUCH CASE OR
                           CONTROVERSY IS INITIATED BY OR AGAINST THE BANK OR
                           BBL OR IN WHICH THE BANK OR BBL IS JOINED AS A
                           PARTY LITIGANT), WHICH CASE OR CONTROVERSY ARISES
                           OUT OF, OR IS IN RESPECT OF, ANY RELATIONSHIP


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                           BETWEEN THE BORROWER OR ANY SUCH PERSON AND THE
                           BANK OR BBL.

                  (h)      Each Obligor shall execute such instruments and
                           documents as BBL and the Bank may from time to time
                           request in connection with the Master Lease
                           Agreement, Loan Agreement, the Guaranties, the Loan
                           Documents, the within Agreement and the arrangements
                           contemplated hereby.

         It is intended that this Agreement take effect as a sealed instrument.

CENTENNIAL TECHNOLOGIES, INC.

By:___________________________

Print Name:___________________

Title:________________________

NCT, INC.

By:___________________________

Print Name:___________________

Title:________________________


AGREED AND ACCEPTED BY:

BANKBOSTON, N.A. F/K/A
THE FIRST NATIONAL BANK OF BOSTON


By:___________________________

Print Name:___________________

Title:________________________

BANCBOSTON LEASING INC.


By:___________________________

Print Name:___________________

Title:________________________


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