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                                                                Exhibit 10.5.h

                                                             FROM THE OFFICE OF

                         STANDARD FORM COMMERCIAL LEASE

1. PARTIES               E & S Associates
   (fill in)             LESSOR, which expression shall include its heirs,
                         successors, and assigns where the context so admits,
                         does hereby lease to Manchester Equipment Company,
                         Inc., a New York Corporation, doing business at 160
                         Oser Avenue, Hauppauge, NY 11788
                         LESSEE, which expression shall include their
                         successors, executors, administrators, and assigns
                         where the context so admits, and the LESSEE hereby
                         leases the following described premises:

2. PREMISES              Suite 211 consisting of approximately 2070 rentable
   (fill in and include, square feet located on the second floor of the Needham
   if applicable, suite  Office Building, 161 Highland Avenue, Needham, MA 02194
   number, floor
   number, and square
   feet)
                         together with the right to use in common, with others
                         entitled thereto, the hallways, stairways, and
                         elevators necessary for access to said leased premises,
                         and lavatories thereto.

3. TERM                  The term of this lease shall be for not less than five
   (fill in)             (5) years commencing on April 15, 1992 and ending on
                         April 30, 1997.

4. RENT                  The LESSEE shall pay to the LESSOR rent at the rate of
   (fill in)                       dollars per year, payable in advance in
                         monthly installments of               . See Section 23

5. SECURITY              Upon the execution of this lease, the LESSEE shall pay
   DEPOSIT               to the LESSOR the amount of $3450.00 dollars, which
   (fill in)             shall be held as a security for the LESSEE's
                         performance as herein provided and refunded to the
                         LESSEE at the end of this lease subject to the LESSEE's
                         satisfactory compliance with the conditions hereof.

6. RENT                  If in any tax year commencing with the fiscal year
   ADJUSTMENT            1993, the real estate taxes on the land and buildings,
                         of which the leased premises are a part, are in excess
                         of the amount of the real estate taxes thereon for the
   A. TAX                fiscal year 1992 (hereinafter called the "Base Year"),
      ESCALATION         LESSEE will pay to LESSOR as additional rent hereunder,
      (fill in or        when and as designated by notice in writing by LESSOR,
       delete)           8 per cent of such excess that may occur in each year 
                         of the term of this lease or any extension or renewal
                         thereof and proportionately for any part of a fiscal
                         year. If the LESSOR obtains an abatement of any such
                         excess real estate tax, a proportionate share of such
                         abatement, less the reasonable fees and costs incurred
                         in obtaining the same, if any, shall be refunded to the
                         LESSEE.

   B. OPERATING          The LESSEE shall pay to the LESSOR as additional rent
      COST               hereunder when and as designated by notice in writing
      ESCALATION         by LESSOR, 8 per cent of any increase in operating
      (fill in or        expenses over those incurred during the calendar year
       delete)           1992. Operating expenses are defined for the purposes
                         of this agreement as: Heat, Light and Power, Insurance,
                         Licenses and Fees, Management Fees, Payroll,
                         Professional Services, Repairs and Maintenance, Water
                         and all other charges normally incurred in the
                         operation of said property.

                         This increase shall be prorated should this lease be
                         in effect with respect to only a portion of any
                         calendar year. 

   C. CONSUMER           (1) LESSEE agrees that in the event the "Consumer Price
      PRICE              Index for Urban Wage Earners and Clerical Workers, U.S.
      ESCALATION         City Average, All Items (1967 = 100)" (Hereinafter
      (fill in or        referred to as the "Price Index") published by the
       delete)           Bureau of Labor Statistics of the United States
                         Department of Labor, or any comparable successor or
                         substitute index designated by the LESSOR appropriately
                         adjusted, reflects an increase in the cost of living
                         over and above the cost of living as reflected by the
                         Price Index for the month of       , 19   (hereinafter
                         called the "Base Price Index"), the Basic Rent shall 
                         be adjusted in accordance with sub-paragraph (2) of 
                         this Article.

                                            Not Applicable

       COPYRIGHT (C) 1968
GREATER BOSTON REAL ESTATE BOARD
         REVISED 1981

All rights reserved. This form may not be copied or reproduced in whole or in
part in any manner whatsoever without the prior ex-
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                         (2) Commencing as of the first anniversary of the Term
                         Commencement Date, there shall be an adjustment
                         (hereinafter referred to as "Adjustment") in the Basic
                         Rent calculated by multiplying the Basic Rent set forth
                         in Article 4 of the lease by a fraction, the numerator
                         of which shall be the Price Index for the month of
                                  , 19   and the denominator of which (for each
                         such fraction) shall be the Base Price Index; PROVIDED,
                         HOWEVER, no Adjustment shall reduce the Basic Rent as
                         previously payable in accordance with this Article or
                         in Article 4 of this lease.

                                            Not Applicable

                         (3) In the event the Price Index ceases to use the 1967
                         average of 100 as the basis of calculation, or if a
                         substantial change is made in the terms or number of
                         items contained in the Price Index, then the Price
                         Index shall be adjusted to the figure that would have
                         been arrived at had the manner of computing the Price
                         Index in effect at the date of this lease not been
                         changed.

                                            Not Applicable

 7. UTILITIES            The LESSEE shall pay, as they become due, all bills for
                         electricity and other utilities (whether they are used
                         for furnishing heat or other purposes) that are
 delete "air             furnished to the leased premises and presently
 conditioning"           separately metered, and all bills for fuel furnished to
 not applicable          a separate tank servicing the leased premises
                         exclusively. The LESSOR agrees to provide all other
                         utility service and to furnish reasonably hot and cold
                         water and reasonable heat and air conditioning (except
                         to the extent that the same are furnished through
                         separately metered utilities or separate fuel tanks as
                         set forth above) to the leased premises, the hallways,
                         stairways, elevators, and lavatories during normal
                         business hours on regular business days of the heating
                         and air conditioning seasons of each year, to furnish
                         elevator service and to light passageways and stairways
                         during business hours, and to furnish such cleaning
                         service as is customary in similar buildings in said
                         city or town, all subject to interruption due to any
                         accident, to the making of repairs, alterations, or
                         improvements, to labor difficulties, to trouble in
                         obtaining fuel, electricity, service, or supplies from
                         the sources from which they are usually obtained for
                         said building, or to any cause beyond the LESSOR's
                         control.

                         LESSOR shall have no obligation to provide utilities or
                         equipment other than the utilities and equipment within
                         the premises as of the commencement date of this lease.
                         In the event LESSEE requires additional utilities or
                         equipment, the installation and maintenance thereof
                         shall be the LESSEE's sole obligation, provided that
                         such installation shall be subject to the written
                         consent of the LESSOR.

 8. USE OF LEASED        The LESSEE shall use the leased premises only for the
    PREMISES             purpose of Office use
    (fill in)

 9. COMPLIANCE           The LESSEE acknowledges that no trade or occupation
    WITH LAWS            shall be conducted in the leased premises or use made
                         thereof which will be unlawful, improper, noisy or
                         offensive, or contrary to any law or any municipal
                         by-law or ordinance in force in the city or town in
                         which the premises are situated.

10. FIRE INSURANCE       The LESSEE shall not permit any use of the leased
                         premises which will make voidable any insurance on the
                         property of which the leased premises are a part, or on
                         the contents of said property or which shall be
                         contrary to any law or regulation from time to time
                         established by the New England Fire Insurance Rating
                         Association, or any similar body succeeding to its
                         powers. The LESSEE shall on demand reimburse the
                         LESSOR, and all other tenants, all extra insurance
                         premiums caused by the LESSEE's use of the premises.

11. MAINTENANCE          The LESSEE agrees to maintain the leased premises in
                         good condition, damage by fire and other casualty only
    A. LESSEE'S          excepted, and whenever necessary. to replace plate
       OBLIGATIONS       glass and other glass therein, acknowledging that the
                         leased premises are now in good order and the glass
                         whole. The LESSEE shall not permit the leased premises
                         to be overloaded, damaged, stripped, or defaced, nor
                         suffer any waste. LESSEE shall obtain written consent
                         of LESSOR before erecting any sign on the premises.
                         Lessor will supply initial door and building directory
                         signage.

    B. LESSOR'S          The LESSOR agrees to maintain the structure of the
       OBLIGATIONS       building of which the leased premises are a part in the
                         same condition as it is at the commencement of the term
                         or as it may be put in during the term of this lease,
                         reasonable wear and tear, damage by fire and other
                         casualty only excepted, unless such maintenance is
                         required because of the LESSEE or those for whose
                         conduct the LESSEE is legally responsible.

    ALTERATIONS -        The LESSEE shall not make structural alterations or
    ADDITIONS            additions to the leased premises, but may make
                         non-structural alterations provided the LESSOR consents
                         thereto in writing, which consent shall not be
                         unreasonably withheld or delayed. All such allowed
                         alterations shall be at LESSEE's expense and shall be
                         in quality at least equal to the present construction.
                         LESSEE shall not permit any mechanics' liens, or
                         similar liens, to remain upon the leased premises for
                         labor and material furnished to LESSEE or claimed to
                         have been furnished to LESSEE in connection with work
                         of any character performed or claimed to have been
                         performed at the direction of LESSEE and shall cause
                         any such lien to be released of record forthwith
                         without cost to LESSOR. Any alterations or improvements
                         made by the LESSEE shall become the property of the
                         LESSOR at the termination of occupancy as provided
                         herein.

    ASSIGNMENT -         The LESSEE shall not assign or sublet the whole or any
    SUBLEASING           part of the leased premises without LESSOR's prior
                         written consent. Notwithstanding such consent, LESSEE
                         shall remain liable to LESSOR for the payment of all
                         rent and for the full performance of the covenants and
                         conditions of this lease.

                            such consent shall not be unreasonably withheld


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SUBORDINATION   This lease shall be subject and subordinate to any and all
                mortgages, deeds of trust and other instruments in the
                nature of a mortgage, now or at any time hereafter, a lien
                or liens on the property of which the leased premises are a
                part and the LESSEE shall, when requested, promptly execute
                and deliver such written instruments as shall be necessary to
                show the subordination of this lease to said mortgages, deeds
                of trust or other such instruments in the nature of a mortgage.

LESSOR'S        The LESSOR or agents of the LESSOR may, at reasonable times,
ACCESS          enter to view the leased premises and may remove placards and
                signs not approved and affixed as herein provided, and make 
                repairs and alterations as LESSOR should elect to do and may
                show the leased premises to others, and at any time within 
                three (3) months before the expiration of the term, may affix
                to any suitable part of the leased premises a notice for letting
                or selling the leased premises or property of which the leased
                premises are a part and keep the same so affixed without
                hindrance or molestation. A representative of the Lessee shall
                be present at such times excluding emergencies.

INDEMNIFI-      The removal of snow and ice from the sidewalks bordering upon 
CATION AND      the leased premises shall be Lessor's responsibility.
LIABILITY
(fill in)

LESSEE'S        The LESSEE shall maintain with respect to the leased premises
LIABILITY       and the property of which the leased premises are a part
INSURANCE       comprehensive public liability insurance in the amount of
(fill in)       $1,000,000.00 with property damage insurance in limits of 
                single aggregate* in responsible companies qualified to do 
                business in Massachusetts and in good standing therein insuring
                the LESSOR as well as LESSEE against injury to persons or
                damage to property as provided. The LESSEE shall deposit with 
                the LESSOR certificates for such insurance at or prior to the
                commencement of the term, and thereafter within thirty (30)
                days prior to the expiration of any such policies. All such
                insurance certificates shall provide that such policies shall
                not be cancelled without at least ten (10) days prior written
                notice to each assured named therein.
                         *limit of liability

FIRE,           Should a substantial portion of the leased premises, or of the
CASUALTY -      property of which they are a part, be substantially damaged by
EMINENT         fire or other casualty, or be taken by eminent domain, the 
DOMAIN          LESSOR may elect to terminate this lease. When such fire,
                casualty, or taking renders the leased premises substantially
                unsuitable for their intended use, a just and proportionate 
                abatement of rent shall be made, and the LESSEE may elect to
                terminate this lease if:
                        (a)  The LESSOR fails to give written notice within
                             thirty (30) days of intention to restore leased
                             premises, or
                        (b)  The LESSOR fails to restore the leased premises 
                             to a condition substantially suitable for their
                             intended use within ninety (90) days of said fire,
                             casualty or taking.
                The LESSOR reserves, and the LESSEE grants to the LESSOR, all
                rights which the LESSEE may have for damages or injury to the 
                leased premises for any taking by eminent domain, except for 
                damage to the LESSEE'S fixtures, property, or equipment.

DEFAULT         In the event that:
AND                     (a)  The LESSEE shall default in the payment of any
BANKRUPTCY                   installment of rent or other sum herein specified
(fill in)                    and such default shall continue for ten (10) days
                             after written notice thereof; or
                        (b)  The LESSEE shall default in the observance or 
                             performance of any other of the LESSEE's covenants,
                             agreements, or obligations hereunder and such
                             default shall not be corrected within thirty (30) 
                             days after written notice thereof; or
                        (c)  The LESSEE shall be declared bankrupt or insolvent
                             according to law, or, if any assignment shall be
                             made of LESSEE's property for the benefit of
                             creditors,

                then the LESSOR shall have the right thereafter, while such
                default continues, to re-enter and take complete possession of
                the leased premises, to declare the term of this lease ended,
                and remove the LESSEE's effects, without prejudice to any
                remedies which might be otherwise used for arrears of rent or
                other default. The LESSEE shall indemnify the LESSOR against all
                loss of rent and other payments which the LESSOR may incur by
                reason of such termination during the residue of the term. If
                the LESSEE shall default, after reasonable notice thereof, in
                the observance or performance of any conditions or covenants on
                LESSEE's part to be observed or performed under or by virtue of
                any of the provisions in any article of this lease, the LESSOR,
                without being under any obligation to do so and without thereby
                waiving such default, may remedy such default for the account
                and at the expense of the LESSEE. If the LESSOR makes any
                expenditures or incurs any obligations for the payment of money
                in connection therewith, including but not limited to,
                reasonable attorney's fees in instituting, prosecuting or
                defending any action or proceeding, such sums paid or
                obligations insured, with interest at the rate of 18 percent per
                annum and costs, shall be paid to the LESSOR by the LESSEE as
                additional rent. 

NOTICE          Any notice from the LESSOR to the LESSEE relating to the leased
(fill in)       premises or to the occupancy thereof, shall be deemed duly
                served, if left at the leased premises addressed to the LESSEE,
                or if mailed to the leased premises, registered or certified
                mail, return receipt requested, postage prepaid, addressed to
                the LESSEE. Any notice from the LESSEE to the LESSOR relating to
                the leased premises or to the occupancy thereof, shall be deemed
                duly served, if mailed to the LESSOR by registered or certified
                mail, return receipt requested, postage prepaid, addressed to
                the LESSOR at such address as the LESSOR may from time to time
                advise in writing. All rent notices shall be paid and sent to
                the LESSOR at 161 Highland Avenue, Needham, MA 02194. 
        
                     
                
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21.  SURRENDER    The LESSEE shall at the expiration or other termination of
                  this lease remove all LESSEE's goods and effects from the
                  leased premises, (including, without hereby limiting the
                  generality of the foregoing, all signs and lettering affixed
                  or painted by the LESSEE, either inside or outside the leased
                  premises). LESSEE shall deliver to the LESSOR the leased
                  premises and all keys, locks thereto, and other fixtures
                  connected therewith and all alterations and additions made
                  to or upon the leased premises, in good condition, damage by
                  fire or other casualty only excepted. In the event of the
                  LESSEE's failure to remove any of LESSEE's property from the
                  premises, LESSOR is hereby authorized, without liability to
                  LESSEE for loss or damage thereto, and at the sole risk of
                  LESSEE, to remove and store any of the property at LESSEE's
                  expense, or to retain same under LESSOR's control or to sell
                  at public or private sale, without notice any or all of the
                  property not so removed and to apply the net proceeds of such
                  sale to the payment of any sum due hereunder, or to destroy
                  such property.

22. BROKERAGE     The Broker(s) named herein None
    (Fill in or
     delete)      warrant(s) that he (they) is (are) duly licensed as such by
                  the Commonwealth of Massachusetts, and join(s) in this
                  agreement and become(s) a party hereto, insofar as any
                  provisions of this agreement expressly apply to him (them),
                  and to any amendments or modifications of such provisions to
                  which he (they) agree(s) in writing.

                  LESSOR agrees to pay the above-named Broker upon the term
                  commencement date a fee for professional services of      

                  or pursuant to Broker's attached commission schedule.

23. OTHER         It is also understood and agreed that
    PROVISIONS 

                  1. The Lessee shall pay to the Lessor rent at the rate of:
                     $20,700.00 per year payable in advance in monthly
                     installments of $ 1725.00 for years 1 through 3, and
                     $22,770.00 per year payable in advance in monthly
                     installments of $1897.50 for years 4 and 5.

                  2. Lessee will have one 5 year option to renew the Lease at
                     the, then current, market rate rents, not to exceed $18.00
                     PSF for the first year of said option.

                  3. Lessor will, at Lessor's sole expense, build-out the
                     demised premise in accordance with the attached plan.
                     (Exhibit A), and in accordance with the Standard Tenant
                     Leasehold Allowances attached. (Exhibit B)

WITNESS WHEREOF, the said parties hereunto set their hands and seals this 26th
day of February, 1992.


/s/ BARRY STEINBERG                     /s/
_____________________________________   ______________________________________
LESSEE  Manchester Equipment Company    LESSOR   E & S Realty Associates
        Inc.
        authorized signature                          

_____________________________________   ______________________________________
LESSEE                                  LESSOR


                     _____________________________________






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                                                                      EXHIBIT A




                                  [BLUEPRINT]



PLAN -- MANCHESTER EQUIPMENT CO., INC.

FEBRUARY 7, 1992


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                                   EXHIBIT B

                      STANDARD TENANT LEASEHOLD ALLOWANCE


Landlord shall perform the following work and installation in the demised
premises at Landlord's sole cost and expense (except as may expressly be
otherwise provided herein) in the initial preparation for Tenant's occupancy.

I.       Partitions

         Partitions within a single premises will be metal studs with one layer
         of drywall on each side. Partitions will extend from the floor to the
         underside of the acoustic tile ceiling. Demising partitions will be
         insulated.

II.     Doors

         All doors within a single premises will be 7 foot by 3 foot, solid core
         with natural birch veneer. Door frames will be pressed metal. Hardware
         will include 1 1/2 pairs of butts, one standard duty latchset and one
         door stop.

III.     Ceilings

         All ceilings will be mechanically suspended acousticaltile in a grid
         system. Tiles shall be mineral fiber.

IV.      Floor Coverings

         Within demised premises, Tenants will select carpeting from Building
         Standard samples.
  
V.       Painting and Wall Coverings

         All wall surfaces shall receive two coats of flat paint. Color
         selection will be made from Building Standard samples with not more
         than two colors per room.

IV.      Lighting

         Landlord will supply and install 2' x 4' recessed Parabolic fluorescent
         lighting fixtures containing three, 40-watt rapid-start tubes at a
         ratio of one fixture per 80 square feet of net rentable area, or as
         otherwise required.

VII.     Electric Outlets

         One standard wall base duplex electrical outlet will be provided for
         each 150 square feet of net usable area, or as otherwise required, as
         noted on Exhibit A.