<PAGE>
EXHIBIT 10(H)  Lease dated March 31, 1994 between Seagull Associates Inc. and
               Compuflight, Inc., as amended, with respect to Port Washington,
               New York premises


                        STANDARD FORM OF OFFICE LEASE
                    The Real Estate Board of New York, Inc.

Agreement of Lease, made as of this (   day of March 1994 between 
SEAGULL ASSOCIATES, a partnership with offices at 80 Davids Drive, Hauppauge, 
New York 11788 
party of the first part, hereinafter referred to as OWNER and 
COMPUFLIGHT, INC., 48 Harbor Park Drive, Port Washington, New York 11050 party
of the second part, hereinafter referred to as TENANT,

Witnesseth:    Owner hereby leases to Tenant and Tenant hereby hires from Owner
a portion of the third floor (the "Premises") see attached floor plan (2,689
RSF) in the building known as 99 Seaview Boulevard, Port Washington, New York
11050 for the term of three (3) years (or until such term shall sooner cease and
expire as hereinafter provided) to commence on the  1st day of May nineteen
hundred and ninety four, and to end on the 30th of April nineteen hundred and
ninety seven both dates inclusive, at an annual rental rate of forty three
thousand two hundred ($43, 200.00) (3, 600.00 per month).  The annual rent shall
be increased by five (5%) per annum for each lease year commencing May 1, 1995
(see paragraph # 69) which tenant agrees to pay in lawful money of the United
States which shall be legal tender in payment of all debts and dues, public and
private, at the time of payment, in equal monthly installments in advance on the
first day of each month during said term, at the office of Owner may designate,
with out any set off or deduction whatsoever, except that Tenant shall pay the
first monthly installment (s) on the execution hereof (unless this lease be a
renewal).

     In the event that, at the commencement of the term of this lease, or
thereafter, Tenant shall be in default in the payment of rent to Owner or with
Owner's predecessor in interest, Owner may at Owner's option and without notice
to Tenant add the amount of such arrears to any monthly installment of rent
payable hereunder and the same shall be payable to Owner as additional rent.

     The parties hereto, for themselves, their heirs, distributes, executors,
administrators, legal representatives, successors and assigns, hereby covenant
as follows:

Rent
          1. Tenant shall pay the rent as above and as hereinafter provided.

Occupancy

          2. Tenant shall use and occupy demised premises for executive and
administrative offices and for other purpose.

<PAGE>

Tenant Alterations:

     3. Tenant shall make no changes in or to the demised premises of any nature
without Owner's prior written consent, Subject to the prior written consent of
Owner, and to the provisions of this article, Tenant at Tenant's expense, may
make alterations, installations or improvements which are non-structural and
which do not affect utility services or plumbing and electrical lines in or to
the interior of the demised premises by using contractors or mechanics first
approved by Owner, Tenant shall, before making any alterations, additions,
Installations or Improvements, at its expense, obtain all permits, approvals and
certificates required by any governmental or quasi governmental bodies and (upon
completion) certificates of final approval thereof and shall deliver promptly
duplicates of all such permits, approvals and certificates to Owner and Tenant
agrees to carry and will cause Tenant's contractors and sub-contractors to carry
such workman's compensation, general liability, personal and property damage
insurance as Owner may require.  If any mechanic's lien is filled against the
demised premises, or the building of which the same forms a part, for work
claimed to have been done for, or materials furnished to, Tenant, whether or not
done pursuant to this article, the same be discharges by Tenant within thirty
days thereafter, at Tenant's expense, by filing the bond required by law.  All
fixtures and all paneling, partitions, railings and like installations,
installed in the premises at any time, either by Tenant or by Owner in Tenant's
behalf, shall, upon installation, become the property of Owner and shall remain
upon and surrendered with the demised premises unless Owner, by notice to Tenant
no later than twenty days prior to the date fixed as the termination of this
lease, elects to relinquish Owner's rights thereto and have to have them removed
by Tenant, in which event the same shall be removed from the premises by Tenant
prior to the expiration of the lease, at Tenant's expense.  Nothing in this
article shall be constructed to give Owner title to or to prevent Tenant's
removal of trade, fixtures, moveable office furniture and equipment, but upon
removal of any such from the premises or upon removal of other installations as
may be required by Owner, Tenant shall immediately and at its expense, repair
and restore the premises to the condition existing prior to installation and
repair any damage to the demised premises or the building due to such removal.
All property permitted or required to be removed, by Tenant at the end of the
term remaining in the premises after Tenant's removal shall be deemed abandoned
and may, at the election of Owner, either be retained as Owner's property or may
be removed from the premises by Owner, at Tenant's expense.

Maintenance

     4. Tenant shall , throughout the term of this lease, take and good care of
the demised premises and the fixtures and repairs appurtenances therein. Tenant
shall be responsible for all damage or injury to the demised premises or any
other part of the building and the systems and equipment thereof, whether
requiring, structural or nonstructural repairs caused by or resulting from
carelessness, omission, neglect or improper conduct of  Tenant, Tenant's
subtenants, agents, employees, invitees or licensees, or which arise out of any
work, labor, service or equipment done for or supplied to Tenant or any
subtenant or arising out of the installation, use or operation of the property
or equipment of Tenant or any subtenant. Tenant shall also repair all damage tot
the building and the demised premises caused by

<PAGE>

the moving of Tenant's fixtures, furniture and equipment. Tenant shall promptly
make, at Tenant's expense, all repairs in and tot he demised premises for which
Tenant is responsible, using only the contractor for the trade or trades in
question, selected from a list of at least two contractors per trade submitted
by Owner. Any other repairs in or to the building or the facilities and systems
thereof for which Tenant is responsible shall be performed by Owner at the
Tenant's expense. Owner shall maintain in good working order and repair the
exterior and the structural portions of the building, including the structural
portions of its demised premises, and the public portions of the building
interior and the building plumbing, electrical and ventilation systems (to the
extent such systems presently exist) servicing the demised premises. Tenant
agrees to give prompt notice to any defective condition in the premises for
which Owner may be responsible hereunder. There shall be no allowance to Tenant
for diminution of rental value and no liability on the part of Owner by reason
of inconvenience, annoyance or injury to business arising from Owner or others
making repairs, alterations, additions or improvements in or to any portion of
the building or the demised premises or in and to the fixtures, appurtenances or
equipment thereof, it is specifically agreed that Tenant shall not be entitled
to any setoff or reduction of rent by reason of any failure of Owner to comply
with the covenants of this or any other article of this Lease, Tenant agrees
that Tenant's sole remedy at law in such instance will be by the way of an
action for damages for breach of contract. The provisions of this Article 4
shall not apply in the case of fire or other casualty which are dealt with in
Article 9 hereof.

Window Cleaning:

     5. Tenant will not clean nor require, permit, suffer or allow any window in
the demised premises to be cleaned from the outside in violation of Section 202
of the Labor Law or of the Rules of the Board or body having or asserting
jurisdiction

Requirements of Law, Fire Insurance, Floor Loads:

     6. Prior to the commencement of the lease term, if Tenant is then in
possession, and at all times thereafter, Tenant, at Tenant's sole and expense,
shall promptly comply with all present and future laws, orders and governments,
departments, commissions and boards and any direction of any public officer
pursuant to law, and all orders, rules and regulations of the New York Board of
Fire Underwriters, Insurance Services Office, or any similar body which shall
impose any violation, order or duty upon Owner or Tenant with respect to the
demised premises, whether or not arising out of  Tenant's use or manner of use
thereof, (Including Tenant's permitted use) or, with respect to the building if
arising out of Tenant's use or manner of use of the premises or the building
(including the use permitted under the lease). Nothing herein shall require
Tenant to make structural repairs or alterations unless Tenant has, by its
manner of use of the demised premises or method of operation therein, violated
any such laws, ordinances, orders, rules, regulations or requirements with
respect thereto.  Tenant may, after securing Owner to Owner's satisfaction
against all damages, interest, penalties, and expenses, including, but not
limited to, reasonable attorney's fees, by cash deposit or by surety bond in an
amount and in a company satisfactory to Owner, contest and appeal any such laws,
<PAGE>

ordinances, orders, rules, regulations or requirements provided dame is done
with all reasonable promptness and provided such appeal shall not subject Owner
to prosecution for a criminal offense or constitute a default under any lease or
mortgage under which Owner may be obligated, or cause the demised premises or
any part thereof to be condemned or vacated. Tenant shall not de or permit any
act or thing to be done in or to the demised premises which is contrary to law,
or which will invalidate or be in conflict with public liability, fire or other
policies of insurance at any time carried by or for the benefit of Owner with
respect to the demised premises or the building of which the demised premises
form a part, or which shall or might subject Owner to any liability or
responsibility to any person or for property damage. Tenant shall not keep
anything in the demised premises except as now or hereafter permitted by the
Fire Department, Board of Fire Underwriters, Fire Insurance Rating Organization
or other authority having jurisdiction, and then only in such manner and such
quality so as not to increase the rate for fire insurance applicable to the
building, nor use the premises in a manner which will increase the insurance
rate for the building or any property located therein over that in effect prior
to the commencement of Tenant's occupancy, Tenant shall pay all costs, expenses,
fines, penalties, or damages, which may be imposed upon Owner by reason of
Tenant's failure to comply with the provisions of this article and if by reason
of such failure the fire insurance rate shall, at the beginning of this lease or
at any time thereafter, be higher than it otherwise would be, then Tenant shall
reimburse Owner, as additional rent hereunder, for that portion of all fire
insurance premiums thereafter paid by Owner which shall have been charged
because of such failure by Tenant. In any action or proceeding wherein Owner and
Tenant are parties, a schedule or "make-up" of rate for the building or demised
premises issued by the New York Fire Insurance Exchange, or other body making
fire insurance rates applicable to said premises shall be conclusive evidence of
the facts therein stated and of the several items and charges in the fire
insurance rates then applicable to said premises. Tenant shall not place a load
upon any floor of the demised premises exceeding the floor load per square foot
area which it was designed to carry and which is allowed by law. Owner reserves
the right to prescribe the weight and positions of all safes, business machines
and mechanical equipment. Such in installations shall be placed and maintained
by Tenant, at Tenant's expense, in settings sufficient, in Owner's judgment, to
absorb and prevent vibration, noise and annoyance.

Subordination:

     7. This lease is subject and subordinate to all ground or underlying leases
and to all mortgages which may now or hereafter affect such leases or the real
property of which demised premises are a part and to all renewals,
modifications, consolidations, replacements and extensions of any such
underlying leases and mortgages. This cause shall be self-operative and no
further instrument of subordination shall be required by any ground or
underlying lessor or by any mortgagee, affecting any lease or the real property
of which the demised premises are a part.  In confirmation of such
subordination, Tenant shall execute promptly any certificate that Owner may
request.

Property-Loss, Damage, Reimbursement, Indemnity:

     8.  Owner or its agents shall not be liable for any damage to property of
Tenant or of

<PAGE>

others entrusted to employees of the building, nor for loss of or damage to any
property of Tenant by theft or otherwise, nor for any injury or damage to
persons or property resulting from any cause of whatsoever nature, unless caused
by or due to the negligence of Owner, its agents, servants or employees. Owner
or its agents will not be liable for any such damage caused by other tenants or
persons in, upon or about said building or caused by operations in construction
of any private, public or quasi public work.

In at any time any windows of the demised premises are temporarily closed,
darkened or bricked up (or permanently closed, darkened or bricked up, if
required by law) for any reason whatsoever including, but not limited to Owner's
own act's, Owner shall not be liable for any damage Tenant may sustain thereby
and Tenant shall not be entitled to any compensation therefor nor abatement or
diminution of rent nor shall the same release Tenant from its obligations
hereunder nor constitute an eviction.  Tenant shall indemnify and save harmless
Owner against and from all liabilities, obligations, damages, penalties, claims,
costs and expenses for which Owner shall not be reimbursed by insurance,
including reasonable attorneys fees, paid, suffered or incurred as a result of
any breach by Tenant, Tenant's agents, contractors, employees, invitees or
licenses, of any covenant or condition of this lease, or the carelessness,
negligence or improper conduct of the Tenant, Tenant's agents, contractors,
employees, invitees or licenses, Tenant's liability under this lease extends to
the acts and omissions of any sub-tenant, and any agent, contractor, employee,
invitee or license of any sub-tenant. In case any action or proceeding is
brought against Owner by reason of any such claim, Tenant, upon written notice
from Owner, will, at Tenant's expense, resist or defend such action or
proceeding by counsel approved by Owner in writing, such approval not to be
unreasonably withheld.

Destruction, Fire and Other Casualty:

     9. (a) If the demised premises or any part thereof shall be damaged by fire
or other casualty, Tenant shall give immediate notice thereof to Owner and this
lease shall continue in full force and effect except as hereinafter set forth.
(b) If the demised premises are partially damaged or rendered partially unusable
by fire or other casualty, the damages thereto shall be repaired by and at the
expense of Owner and the rent, until such repair shall be substantially
completed, shall be appointed from the day following the casualty according to
the part of the premises which is usable. (c) If the demised premises are
totally damaged or rendered wholly unusable by fire or other casualty, then the
rent shall be proportionately paid up to the time of the casualty and the
thenceforth shall cease until the date when the premises shall have been
repaired and restored by Owner subject to Owner's right to elect not to restore
the same as hereinafter provided. (d) If the demised premises are rendered
wholly unusable or (whether or not the demised premises are damaged in whole or
in part) if the building shall be so damaged that Owner shall decide to demolish
it or to rebuild it, then, in any of such events, Owner may elect to terminate
this lease by written notice to Tenant, given within 90 days after such fire or
casualty, specifying a date for the expiration of the lease, which date shall
not be more than 60 days after giving of such notice, and upon the date
specified in such notice the term of this lease shall expire as fully and
completely as if

<PAGE>

such date were the date set forth above for the termination of this lease and
Tenant shall forthwith quit, surrender and vacate the premises without prejudice
however, to Landlord's rights and remedies against Tenant under the lease
provisions in effect prior to such termination, and any rent owing shall be paid
up to such date and any payments of rent made by Tenant which were on account of
any period subsequent to such gate shall be returned to Tenant. Unless Owner
shall serve a termination notice as provided for herein, Owner shall make the
repairs and restorations under the conditions of (b) and (c) hereof, with all
reasonable expedition, subject to delays due to adjustment of insurance claims,
labor troubles and causes beyond Owner's control. After any such casualty,
Tenant shall cooperate with Owner's restoration by removing from the premises as
reasonably possible, all of Tenant's salvageable and moveable equipment,
furniture, and other property, Tenant's liability for rent shall resume five (5)
days after written notice from Owner that the premises are substantially ready
for Tenant's occupancy. (e) Nothing contained hereinabove shall relieve Tenant
from liability that may exist as a result of damage from fire or other casualty.
Notwithstanding the foregoing, each party shall look first to any insurance in
its favor before making any claim against the other party for recovery for loss
or damage resulting from fire or other casualty, and to the extent that such
insurance is in force and collectible and to the extent permitted by law, Owner
and Tenant each hereby releases and waives all right of recovery against the
other or any one claiming through or under each of them by way of subrogation or
otherwise. The foregoing release and waiver shall be in force only if both
releasers' insurance policies contain a clause providing that such a release or
waiver shall not invalidate the insurance. If, and to the extent, that such
waiver can be obtained only by the payment of additional premiums, then the
party benefiting from the waiver shall pay such premium within ten days after
written demand or shall be deemed to have agreed that the party obtaining
insurance coverage shall be free of any further obligation under the provisions
hereof within respect to waiver of subrogation. Tenant acknowledges that Owner
will not carry insurance on Tenant's furniture and/or furnishings or any
fixtures or equipment, improvements, or appurtenances removable by Tenant and
agrees that Owner will not be obligated to repair any damage thereto or replace
the same. (f) Tenant hereby waives the provisions of Section 227 of the Real
Property Law and agrees that the provisions of this article shall govern and
control in lieu thereof.

Eminent Domain:

     10.  If the whole or any part of the demised premises shall be acquired or
condemned by Eminent Domain for any public or quasi public use or purpose, then
and in that event, the term of this lease shall cease and terminate from the
date of title vesting in such proceeding and Tenant shall have no claim for the
value of any unexpired term of said lease and assigns to Owner, Tenant's entire
interest in any such award.

Assignment, Mortgage, Etc.:

     11.  Tenant, for itself, its heirs, distributees, executors,
administrators, legal representatives, successors and assigns, expressly
covenants that it shall not assign, mortgage or encumber this agreement, nor
underlet, or suffer or permit

<PAGE>

the demised premises or any part thereof to be used by others, without the prior
written consent of Owner in each instance. Transfer of the majority of the stock
of a corporate Tenant shall be deemed an assignment. If this lease is assigned,
or if the demised premises or any part thereof be underlet or occupied by
anybody other than Tenant, Owner may, after default by Tenant, collect rent from
the assignee, under-tenant or occupant, and apply the net amount collected to
the rent herein reserved, but no such assignment, underletting, occupancy or
collection shall be deemed a waiver of this covenant, or the acceptance of the
assignee, under-tenant or occupant as tenant, or release of Tenant from the
further performance by Tenant of covenants on the part of Tenant herein
contained. The consent by Owner to an assignment or underletting shall not in
any wise be constructed to relieve Tenant from obtaining the express consent in
writing of Owner to any further assignment or underletting.

Electric Current:

     12. Rates and conditions in respect to sub metering or rent inclusion, as
the case may be, to be added in RIDER attached hereto. Tenant covenants and
agrees that all times its use of electric current shall not exceed the capacity
of existing feeders to the building or the risers or wiring installation and
Tenant may not use any electrical equipment which, in Owner's option, reasonably
exercised, will overload such installations or interfere with the use thereof by
other tenants of the building. The change at any time of the character of
electric service shall in no wise make Owner liable or responsible to Tenant,
for any loss, damages or expenses which Tenant may sustain.

Access to Premises:

     13.  Owner or Owner's agents shall have the right (but shall not be
obligated) to enter the demised premises in any emergency at any time, and, at
other reasonable times, to examine the same and to make such repairs,
replacements and improvements as Owner may deem necessary and reasonably
desirable to the demised premises or to any other portion of the building or
which Owner may elect to perform. Tenant shall permit Owner to use and maintain
and replace pipes and conduits in and trough the demised premises and to erect
new pipes and conduits therein provided they are concealed within the walls,
floor, or ceiling. Owner may, during the progress of any work in the demised
premises, take all necessary materials and equipment into said premises without
the same constituting an eviction one shall the Tenant be entitled to any
abatement of rent while such work is in progress nor to any damages by reason of
loss or interruption of business or otherwise.  Throughout the term hereof Owner
shall have the right to enter the demised premises at reasonable hours for the
purpose of showing the same to prospective purchasers or mortgagees of the
building, and during the last six months of the term for the purpose of showing
the same to prospective tenants. If Tenant is not present to open and permit an
entry into the premises, Owner or Owner's agents may enter the same whenever
such entry may be necessary or permissible by master key or forcibly and
provided reasonable care is exercised to safeguard Tenant's property, such entry
shall not render Owner or its agents liable therefor, nor in any event shall the
obligations of Tenant hereunder be affected.  If during the last month of the
term Tenant shall have removed all or substantially all of Tenant's property
therefrom. Owner, may immediately enter, alter, renovate or redecorate

<PAGE>

the demised premises without limitation or abatement of rent, or incurring
liability to Tenant for any compensation and such act shall have no effect on
this lease or Tenant's obligations hereunder.

Vault, Vault Space, Area:

     14. No vaults, vault space or area, whether or not enclosed or covered, not
within the property line of the building is leased hereunder, anything contained
in or indicated on any sketch, blue print or plan, or anything contained
elsewhere in this lease to the contrary notwithstanding. Owner makes no
representation as to the location of the property line of the building. All
vaults and vault space and all such areas not within the property line of the
building which Tenant may be permitted to use and/or occupy, is to be used
and/or occupied under a revocable license , and if any such license be revoked,
or if the amount of such space or area be diminished by any federal, state or
municipal authority or public utility, Owner shall not be subject to any
liability nor shall Tenant be entitled to any compensation or diminution or
abatement of rent, nor shall such revocation, diminution or requisition be
deemed constructive or actual eviction. Ant tax, fee or charge of municipal
authorities for such vault or area shall be paid by Tenant.

Occupancy:

     15. Tenant will not at any time use or occupy the demised premises in
violation of the certificate of occupancy issued for the building of which the
demised premises are a part. Tenant has inspected the premises and accepts them
as is. If any, In any event, Owner makes no representation as to the condition
of the premises and Tenant agrees to accept the same subject to violations,
whether or not of record.

Bankruptcy:

     16. (a) Anything elsewhere in this lease to the contrary notwithstanding,
this lease may be canceled by Owner by sending of a written notice to Tenant
within a reasonable time after the happening of any one or more of the following
events: (1) the commencement of a case in bankruptcy or under the laws of any
state naming Tenant as the debtor; or (2) the making by Tenant of an assignment
or any other arrangement for the benefit of creditors under any state statute.
Neither Tenant nor any person claiming through or under Tenant or by reason of
any statute or order of court, shall thereafter be entitled to possession of the
premises demised but shall forthwith quit and surrender the premises. If this
lease shall be assigned in accordance with its terms, the provisions of this
Article 16 shall be applicable only to the party then owning Tenant's interest
in this lease. (b) It is stipulated and agreed that in the event of the
termination of this lease pursuant to (a) hereof, Owner shall forthwith
notwithstanding any other provisions of this lease to the contrary, be entitled
to recover from Tenant as and for liquidated damages an amount equal to the
difference between the rent reserved hereunder for the unexpected portion of the
term demised and the fair and reasonable rental value of the demised premises
for the same period. In the computation of such damages the difference between
any installment of rent becoming due hereunder after the date of termination and
the fair and reasonable rental value of the demised premises for the period for
which such installment was payable shall be discounted to the date of
termination at the rate of four percent (4%) per annum. If such premises or any
part thereof be relate by the Owner for the unexpired term of said lease, or any
part thereof, before presentation of proof of such liquidated damages to any
court,

<PAGE>

commission or tribunal, the amount of rent reserved upon such reletting shall be
deemed to be the fair and reasonable rental value for the part or the whole of
the premises so re-let during the term of the re-letting. Nothing herein
contained shall limit or prejudice the right of the Owner to prove for and
obtain as liquidated damages by reason of such termination , an amount equal to
the maximum allowed by any statute or rule of law in effect at the time when,
and governing the proceedings in which, such damages are to be proved, whether
or not such amount greater, equal to, or less than the amount of the difference
referred to above.

Default:

     17.  (1) If Tenant defaults in fulfilling any of the covenant of rent or
additional rent; or if the demised premises becomes vacant or deserted; or if
any execution or attachment shall be issued against Tenant or any of Tenant's
property whereupon the demised premises shall be taken or occupied by someone
other than Tenant; or if this lease be rejected under $235 of Title 11 of the
U.S. Code (bankruptcy code); or if Tenant shall fall to move into or take
possession of the premises within fifteen (15) days after the commencement of
the term of this lease, then in any one or more of such events, upon Owner
serving a written five (5) days notice upon Tenant specifying the nature of said
default and upon the expiration of said five (5) days, if Tenant shall have
failed to comply with or remedy such default, or if the said default or omission
complained of shall be of a nature that the same cannot be completely cured or
remedied within said five (5) day period, and if Tenant shall not have
diligently commences during such default within such five (5) day period, and
shall not thereafter with reasonable diligence and in good faith, proceed to
remedy or cure such default, then Owner may serve a written three (3) days
notice of cancellation of this lease upon Tenant, and upon the expiration of
said three (3) days this lease and the term thereunder shall end and expire as
fully and completely as if the expiration of such three (3) day period were the
day herein definitely fixed for the end and expiration of this lease and the
term thereof and Tenant shall then quit and surrender the demised premises to
Owner but Tenant shall remain liable as hereinafter provided.

(2) If the notice provided for in (1) hereof shall expire as aforesaid: or if
Tenant shall make default in the payment of the rent reserved herein or any item
of additional rent herein mentioned or any part of either or in making any other
payment herein required: then and in any of such events Owner may without
notice, re-enter the demised premises either by force or otherwise , and
dispossess Tenant by summary proceedings or otherwise, and the legal
representative of Tenant or other occupant of demised premises and remove their
effects and hold the premises as if this lease had not been made, and Tenant
hereby waives the service of notice of intention to re-enter or to institutes
legal proceedings to that end. If Tenant shall make default hereunder prior to
the date fixed as the commencement of any renewal or extension of this lease,
Owner may cancel and terminate such renewal or extension agreement by written
notice.

Remedies of Owner and Waiver of Redemption:    

     18.  In case of any such default, re-entry, expiration and/or dispossess 
by summary proceedings

<PAGE>

or otherwise (a) the rent shall become due thereupon and be paid up to the time
of such re-entry, dispossess and/or expiration, (b) Owner may re-let the
premises or any part or parts thereof, either in the name of Owner or otherwise,
for a term or terms which may at Owner's option be less than or exceed the
period which would otherwise have constituted the balance of the term of this
lease and may grant concessions or free rent or charge a higher rental than that
in this lease and/or (c) Tenant or the legal representatives of Tenant shall
also pay Owner as liquidated damages for the failure of Tenant to observe and
perform said Tenant's convenants herein contained, any deficiency between the
rent hereby reserved and/or covenanted to be paid and the net amount, if any, of
the rents collected on account of the lease or leases of the demised premises
for each month of the period which would otherwise have constituted the balance
of the term of this lease.  The failure of Owner to re-let the premises or any
part or parts thereof shall not release or affect Tenant's liability for
damages. In computing such liquidated damages there shall be added to the said
deficiency such expenses as Owner may incur in connection with re-letting, such
as legal expenses, attorneys, fees, brokerage, advertising and for keeping the
demised premises in good order or for preparing the same for re-letting. Any
such liquidated damages shall be paid in monthly installments by Tenant on the
rent day specified in this lease and any suit brought to collect the amount of
the deficiency for any month shall not prejudice in any way the rights of Owner
to collect the deficiency for any month shall not prejudice in any way the
rights of Owner to collect the deficiency of any subsequent month by a similar
proceeding. Owner, in putting the demised permission good order or preparing the
same re-rental may, at Owner's option, make such alterations, repairs,
replacements, and/or decorations in the demised premises as Owner in Owner's
sole judgment, considers advisable and necessary for the purpose of re-letting
the demised premises, and the making of such alterations, repairs, replacements,
and/or decorations shall not operate or be constructed to release Tenant from
liability hereunder as aforesaid. Owner shall in no event be liable in any way
whatsoever for failure to re-let the demised premises, or in the event that the
demised premises are re-let, for failure to collect the rent thereof under such
re-letting, and in no event shall Tenant be entitled to receive any excess, if
any, of such net rents collected over the sums payable by Tenant to Owner
hereunder. In the event of a breach or threatened breach by Tenant of any of the
covenants or provisions hereof, Owner shall have the right of injunction  and
the right to invoke any remedy allowed at law or in equity as if re-entry,
summary proceedings and other remedies were not herein provided for. Mention in
this lease of any particular remedy, shall not preclude Owner from any other
remedy, in law or in equity. Tenant hereby expressly waives any and all rights
of redemption granted by or under any present or future laws in the event of
Tenant being evicted or dispossessed for any cause, or in the event of Owner
obtaining possession of demised premises, by reason of the violation by tenant
of any of the covenants and conditions of this lease, or otherwise.

Fees and Expenses:

     19.  If Tenant shall default in the observance or performance of any term
or covenant on Tenant's part to be observed or performed under or by virtue of
any of the terms or provisions in any of this lease, then, unless otherwise 
provided elsewhere in this lease, 
<PAGE>


Owner may immediately or at any time thereafter and without notice perform the
obligation of Tenant thereunder. If Owner, in connection with the foregoing or
in connection with any default by Tenant in the covenant to pay rent hereunder,
makes any expenditures or incurs any obligations for the payment of money, 
including but not limited to attorney's fees in instituting, prosecuting or 
defending any action or proceeding, then Tenant will reimburse Owner for such 
sums so paid or obligations incurred with interest and costs. The foregoing 
expenses incurred by reason of Tenant's default shall be deemed to be 
additional rent hereunder and shall be paid by Tenant to Owner within five (5)
days of rendition of any bill or statement to Tenant therefor, if Tenant's 
lease term shall have expired at the time of making of such expenditures or 
incurring of such obligations, such sums shall be recoverable by Owner as 
damages.


Building Alterations and Management:

     20. Owner shall have the right at any time without the same consulting an
eviction and without in incurring liability to Tenant therefor to change the
arrangement and/or location of public entrances, passageways, doors, doorways,
corridors, elevators, stairs, toilets or other public parts of the building and
to change the name, number or designation by which the building may be known.
There shall be no allowance to Tenant for diminution of rental value and no
liability on the part of Owner by reason of inconvenience, annoyance or injury
to business arising from Owner or other Tenants making any repairs in the
building or any such alterations, additions and improvements. Furthermore,
Tenant shall not have any claim against Owner by reason of Owner's imposition of
such controls of the manner of access to the building by Tenant's social or
business visitors as the Owner may deem necessary for the security of the
building and its occupants.

No Representations by Owner:

     21. Neither Owner nor Owner's agents have made any representations or
promises with respect to the physical condition of the building, the land upon
which it is erected or the demised premises, the rents, leases, expenses of
operation or any other matter or thing affecting or related to the premises
except as herein expressly set forth and no rights, easements or licenses are
acquired by Tenant by implication or otherwise except as expressly set forth in
the provisions of this lease. Tenant has inspected the building and the demised
premises and is thoroughly acquainted with their condition and agrees to take
the same "as is" and acknowledges that the taking of possession of the demised
premises by Tenant shall be conclusive evidence that the said premises and the
building of which the same form a part were in good and satisfactory condition
at the time such possession was so taken, except as to latent defects. All
understandings and agreements heretofore made between the parties hereto are
merged in this contract, which alone fully and completely expresses the
agreement between Owner and Tenant and any executory agreement hereafter made
shall be ineffective to change, modify, discharge or effect an abandonment of it
in whole or in part, unless such executory agreement is in writing and signed by
the party against whom enforcement of the change, modification, discharge or
abandonment is sought.

<PAGE>

End of Term:

     22. Upon the expiration or other termination of the term of this lease,
Tenant shall quit and surrender to Owner the demised premises, broom clean, in
good order and condition, ordinary wear and damages which Tenant is not required
to repair as provided elsewhere in this lease excepted, and Tenant shall remove
all its property. Tenant's obligation to observe or perform this covenant shall
survive the expiration or other termination of this lease. If the last day of
the term of this Lease or any renewal thereof, falls on Sunday, this lease shall
expire at noon on the preceding Saturday unless it be a legal holiday in which
case it shall expire at noon on the preceding business day.

Quiet Enjoyment:

     23. Owner covenants and agrees with Tenant that upon Tenant paying the rent
and additional rent and observing and performing all the terms, covenants and
conditions, on Tenant's part to be observed and performed, Tenant may peaceably
and quietly enjoy the premises hereby demised, subject, nevertheless, to the
terms and conditions of this lease including, but not limited to, Article 30
hereof and to the ground leases, underlying leases and mortgages hereinbefore
mentioned.

Failure to Give Possession:

     24. If Owner is unable to give possession of the demised premises on the
date of the commencement of the term hereof, because of the holding-over or
retention of possession of any tenant, under tenant or occupants or if the
demised premises are located in an building being constructed, because such
building has not been sufficiently completed to make the premises ready for
occupancy or because of the fact that a certificate of occupancy has not been
procured or for any reason, Owner shall not be subject to any liability for
failure to give possession on said date and the validity of the lease shall not
be impaired under such circumstances, nor shall not be impaired under such
circumstances, nor shall the same be constructed in any wise to extend the term
of this lease, but the rent payable hereunder shall be abated (provided Tenant
is not responsible for Owner's inability to obtain possession) until after Owner
shall have given Tenant written notice that the premises are substantially ready
for Tenant's occupancy. If permission is given to Tenant to enter into the
possession of the demised premises or to occupy premises other than the demised
premises prior to date specified as the commencement of the term of this lease,
Tenant covenants and agrees that such occupancy shall be deemed to be under all
the terms, covenants, conditions and provisions of this lease, except as to the
covenant to pay rent. The provisions of this article are intended to constitute
"an express provision to the contrary" within the meaning of Section 223-a of
the New York Real Property Law.

No Waiver:

     25. The failure of Owner to seek redress for violation of, or to insist
upon the strict performance of any covenant or condition of this lease or of any
of the Rules or Regulations, set forth or hereafter adopted by Owner, shall not
prevent a subsequent act which would have originally constituted a violation
from having all the force and effect of an original violation. The receipt by
Owner of rent with knowledge of the breach of any covenant of this lease shall
not be deemed a waiver of such breach and no provision of this lease shall be


<PAGE>

deemed to have been waived by Owner unless such waiver be in writing signed by
Owner. No payment by Tenant or receipt by Owner of a lesser amount than the
monthly rent herein stipulated shall be deemed to be other than on account of
the earliest stipulated rent, nor shall any endorsement or statement of any
check or any letter accompanying any check or payment as rent be deemed an
accord and satisfaction, and Owner may accept such check or payment without
prejudice to Owner's right to recover the balance of such rent or pursue any
other remedy in this lease provided. No act or thing done by Owner or Owner's
agents during the term hereby demised shall be deemed an acceptance of surrender
of said premises, and no agreement to accept such surrender shall be valid
unless in writing signed by Owner. No employee of Owner or Owner's agent shall
have any power to accept the keys of said premises prior to the termination of
the lease and the delivery of keys to any such agent or employee shall not
operate as a termination of the lease or a surrender of the premises.

Waiver of Trial by Jury:

     26.  It is mutually agreed by and between Owner and Tenant that the
respective parties hereto shall and they hereby do waive trial by jury in any
action, proceeding or counter claim brought by either of the parties hereto
against the other (except for personal injury or property damage) on any matters
whatsoever arising out of or in any way connected with this lease, the
relationship of Owner and Tenant, Tenant's use of or occupancy of said premises,
and any emergency statutory or any other statutory remedy. It is further
mutually agreed that in the event Owner commences any summary proceeding for
possession of the premises, Tenant will not interpose any counter claim of
whatever nature or description in any such proceeding including a counterclaim
under Article 4.

Inability to Perform:

     27. This Lease and the obligation of Tenant to pay rent hereunder and
perform all of the other covenants and agreements hereunder on part of Tenant to
be performed shall in no wise be affected, impaired or excused because Owner is
unable to fulfill any of its obligations under this lease or to supply or is
delayed in supplying any service expressly or implied to be supplied or is
unable to make, or is delayed in making any repair, additions, alterations or
decorations or is unable to supply or is delayed in supplying any equipment of
fixtures if Owner is prevented or delayed from so doing by reason of strike or
labor troubles or any cause whatsoever including, but not limited to, government
preemption in connection with a National Emergency or by reason of any rule,
order or regulation of any department or subdivision thereof of any government
agency or by reason of the conditions of supply and demand which have been or
are affected by war or other emergency.

Bills and Notices:

     28. Except as otherwise in this lease provided, a bill, statement, notice
or communication which Owner may desire or be required to give Tenant, shall be
deemed sufficiently given or rendered if, in writing, delivered to Tenant
personally or sent by registered or certified mail addressed to Tenant at the
building of which the demised premises form a part or at the last known
residence address or business address of Tenant or left at ant of the aforesaid
premises addressed to Tenant, and the time of the rendition of such bill or
statement and of

<PAGE>

the giving of such notice or communication shall be deemed to be the time when
the same is delivered to Tenant, mailed, or left at the premises as herein
provided. Any notice by Tenant to Owner must be served by registered or
certified mail addressed to Owner at the address first hereinabove given or at
such other address as Owner shall designate by written notice.

Services Provided by Owners:

     29. As long as Tenant is not in default under any of the covenants of this
lease, Owners shall provide: (a) necessary elevator facilities on business days
from 8 a.m. to 6 p.m. and on Saturdays from 8 a.m. to 1 p.m. and have one
elevator subject to call at all other times; (b) heat to the demised premises
when and as required by law , on business days from 8 a.m. to 6 p.m. and on
Saturdays from 8 a.m. to 1 p.m.; (c) water for ordinary lavatory purposes, but
if Tenant uses or consumes water of any other purposes or in unusual qualities
(of which fact Owner shall be the sole judge). Owner may install a water meter
at Tenant's expense which Tenant shall thereafter maintain at Tenant's expense
in good working order and repair to register such water consumption and Tenant
shall pay for water consumed as shown on said meter as additional rent as and
when bills are rendered; (d) cleaning services for the demised premises on
business days at Owner's expense provided that the same are kept in order by
Tenant.(e) If the demised premises is serviced by Owner's air
conditioning/cooling and ventilating system, air conditioning/cooling will be
furnished to tenant from May 15th through September 30th on business days
(Mondays through Fridays, holidays excepted) from 8:00 a.m. to 6:00 p.m., and
ventilation will be furnished on business days during the aforesaid hours except
when air conditioning/cooling is being furnished as aforesaid. If Tenant
requires air conditioning/cooling or ventilation for more extended hours or on
Saturdays, Sundays or on holidays, as defined under Owner's contract with
Operating Engineers Local 94-94A, Owner will furnish the same at Tenant's
expense. RIDER to be added in respect to rates and conditions for such
additional service. (f) Owner reserves the right to stop services of the
heating, elevators, plumbing, air conditioning, power systems or cleaning or
other services, if any, when necessary by reason of accident or for repairs,
alterations, replacements or improvements necessary or desirable in the judgment
of Owner as long as may be reasonably required by reason thereof. If the
building of which the demised premises are a part supplies manually operated
elevator service, Owner at any time may substitute automatic control elevator
service and upon ten days written notice to Tenant, proceed with alterations
necessary thereof without in any wise affecting this lease or the obligation of
Tenant hereunder. The same shall be done with a minimum of inconvenience to
Tenant and Owner shall pursue the alteration with due diligence.

Captions:

     30.  The Captions are inserted only as a matter of convenience and for
reference and in no way define, limit or describe the scope of this lease nor
the intent of any provisions thereof.

Definitions:

     31.  The term "office", or "offices", wherever used in this lease, shall
not be constructed to mean premises used as a sore or stores, for the sale or
display, at any time, of goods, wares or merchandise, of any kind, or as a
restaurant, shop, booth, bootblack or

<PAGE>

other stand, barber shop, or for other similar purposes or for manufacturing.
The term "Owner" means a landlord or lessor, and as used in this lease means
only the owner, or the mortgagee in possession, for the time being of the land
and building (or the owner of a lease of the building or of the land and
building) of which the demised premises form a part, so that in the event of any
sale or sales of said land and building or of said building, or of the land and
building, the said Owner shall be and hereby is entirely freed and relieved of
all covenants and obligations of Owner hereunder, and it shall be deemed and
constructed without further agreement between the parties or their successors in
interest, or between the parties and the purchaser, at any such sale, or the
said lease of the building, or of the land and building, that the purchaser or
the lessee of the building has assumed and agreed to carry out any and all
covenants and obligations of Owner, hereunder.  The words "re-entry" as used in
this lease are not restricted to their technical legal meaning. The term
"business days" as used in this lease shall exclude Saturdays (except such
portion thereof as is covered by specified hours in Article 29 hereof), Sundays
and all days observed by the State or Federal Government as legal holidays and
those designated as holidays by the applicable building service union employees
service contract or by the applicable Operating Engineers contract with respect
to HVAC service.

Adjacent Excavation -Shoring:

     32. If an excavation shall be made upon land adjacent to the demised
premises, or shall be authorized to be made, Tenant shall afford to the person
causing or authorized to cause such excavation, license to enter upon the
demised premises for the purpose of doing such work as said person shall deem
necessary to preserve the wall or the building of which demised premises form a
part from injury or damage and to support the same by proper foundations without
any claim for damages or indemnity against Owner, or diminution or abatement of
rent.

Rules and Regulations:

     33. Tenant and Tenant's servants, employees, agents, visitors, and
licensees shall observe faithfully, and comply strictly with, the Rules and
Regulations and such other and further reasonable Rules and Regulations as Owner
or Owner's agents may from time to time adopt. Notice of any additional rules or
regulations shall be given in such manner as Owner may elect. In case Tenant
disputes the reasonableness of any additional Rule or Regulation hereafter made
or adopted by Owner or Owner's agents, the parties hereto agree to submit the
question of the reasonableness of such Rule or Regulation for decision to the
New York office of the American Arbitration Association, whose determination
shall be final and conclusive upon the parties hereto. The right to dispute the
reasonableness of any additional Rule or Regulation upon Tenant's part shall be
deemed waived unless the same shall be asserted by service of a notice, in
writing upon Owner within ten (10) days after giving of notice thereof.  Nothing
in this lease contained shall be constructed to impose upon Owner any duty or
obligation to enforce the Rules and Regulations or terms, covenants or
conditions in any other lease, as against any other tenant and Owner shall not
be liable to Tenant for violation of the same by any other tenant, its servants,
employees, agents, visitors or licensees.

<PAGE>

Security:

     34. Tenant has deposited with Owner the sum of $ 3,600.00 as security for
the faithful performance and observance by Tenant of the terms, provisions and
conditions of this lease; it is agreed that in the event Tenant defaults in
respect of any of the terms, provisions and conditions of this lease, including,
but not limited to, the payment of rent and additional rent, Owner may use,
apply or retain the whole or any part of the security deposited to the extent
required for the payment of any rent and additional rent or any other sum as to
which Tenant is in default or for any sum which Owner may expend or may be
required to expend by reason of Tenant's default in respect of any of the terms,
covenants and conditions of this lease, including but not limited to, any
damages or deficiency in the re-letting of the premises, whether such damages or
deficiency accrued before or after summary proceedings or other re-entry by
Owner. In the event that Tenant shall fully and faithfully comply with all of
the terms, provisions, covenants and conditions of this lease, the security
shall be returned to Tenant after the date fixed as the end of the Lease and
after delivery of entire possession of the demised premises to Owner. In the
event of a sale of the land and building or leasing of the building, of which
the demised premises form a part, Owner shall have the right to transfer the
security to the vendee or lessee and Owner shall there upon be released by
Tenant from all liability for the return of such security; and Tenant agrees to
look to the new Owner solely for the return of said security, and it is agreed
that the provisions hereof shall apply to every transfer or assignment made of
the security to a new Owner. Tenant further covenants that it will not assign or
encumber or attempt to assign or encumber the monies deposited herein as
security and that neither Owner nor its successors or assigns shall be bound by
any such assignment, encumber, attempted assignment or attempted encumbrance.

Estoppel Certificate

     35. Tenant, at any time, and from time to time, upon at least 10 days'
prior notice by Owner, shall execute, acknowledge and deliver to Owner, and/or
to any other person, firm or corporation specified by Owner, a statement
certifying that this Lease is unmodified and in full force and effect (or, if
there have been modifications, that the same is in full force and effect as
modified and stating the modifications), stating the dates to which the rent and
additional rent have been paid, and stating whether or not there exists any
default by Owner under this Lease, and if so, specifying each such default.

Successors and Assigns:

     36. The covenants, conditions and agreements contained in this lease shall
bind and inure to the benefit of Owner and Tenant and their respective heirs,
distributees, executors, administrators, successors, and except as otherwise
provided in this lease, their assigns.

*    Throughout the Lease notices requiring 3 days will be increased to 5 days,
     notices requiring 5 days will be increased to 10 days.

*    Not responsible for existing or latent defects.

Lease continued on Rider to Lease attached hereto containing Paragraphs 37-.

<PAGE>

                              SEAGULL ASSOCIATES
                              PAUL SCHMERGEL & SONS
Witness for Owner:

 ............................................................
 ...............................................             John P. Schmergel

 ............................................................[L.S.]
Witness for Tenant:                COMPUFLIGHT, INC.

 ............................................................
 ..............................................

 ............................................................[L.S.]
                              Russell K. Thal, President

RIDER TO LEASE DATED ,March 31, 1994 BETWEEN SEAGULL ASSOCIATES AS OWNER, AND
COMPUFLIGHT, INC. AS TENANT, COVERING SPACE AT 99 SEAVIEW BOULEVARD,  PORT
WASHINGTON, NEW YORK

     37. In the event of a conflict between the terms of the printed  portion of
this Lease, and the terms of this Rider, the terms of this Rider shall prevail.

     38. A. Subject to the provisions of Paragraph 12, Owner will redistribute
or furnish to Tenant the electric energy which  Tenant shall require for the use
of Tenant in the Premises on a  so-called "rent inclusion" basis, and there
shall be no charge to  Tenant therefor by way of measuring the same on any meter
or  otherwise, the total charge for electric current being included in the Fixed
Rent set forth in the "WITNESSETH" paragraph of this Lease.

     B. Tenant's use of electric current in the Premises shall not at any  time
exceed the capacity of any of the electrical conductors and equipment in or
otherwise serving the Premises. Tenant shall not make or perform, or permit the
making or performing of, any alterations to  wiring installations or other
electrical facilities in or serving the  Premises or any additions to the
machines, equipment and other appliances in the Premises without the prior
written consent of Owner  in each instance. Should Owner grant any such consent,
all additional risers or other equipment required therefor shall be installed
by  Owner and the cost thereof shall be paid by Tenant, upon Owner's  fifteen
(15) day notice, as additional rent. As a condition to  granting any such
consent, Owner may require that Tenant shall agree  to an increase in the annual
rent payable hereunder by an amount which will reflect the vague to Tenant of
the additional service to be  furnished by Owner, that is, the potential
additional electric current to be made available to Tenant.

<PAGE>

     39. Owner shall provide parking spaces in the Building's parking area  for
the use of Tenant, at no additional charge to Tenant. Tenant shall be entitled
to ten (10) parking spaces provided by Owner for the  Building's tenants, which
spaces may be used by Tenant and Tenant's  employees and visitors, for the
parking of automobiles only, on a  non-exclusive, "first come-first served"
basis with the other  tenants of the Building and their employees and visitors.
The parking  area, driveways, walkways and any other common areas shall be
unattended and subject to Rules and Regulations to be promulgated by  Owner from
time to time. Use of the parking area shall be at the risk  solely of the
individual vehicle owners and users, and Owner shall not be liable for death or
injury to persons in connection with any use of the parking area,   nor for any
loss or damage, by theft, collision,  casualty or otherwise, to any vehicle or
its contents unless solely  due to Landlord negligence.

     40. For the purpose of this Lease:

     The term "lease year" shall mean the l2-month period commencing on  the
first day of the term of this Lease, and each successive l2-month  period
commencing on the anniversary of the first day of the term of  this Lease,
except that the final lease year shall be the period, of  whatever duration,
commencing on the last such anniversary prior to  the expiration or earlier
termination of the term of this Lease and  ending upon the date of such
expiration or termination.

     41. A. For the purpose of this Article:

     (1) The term "Taxes" shall mean the Town of North Hempstead General  Tax
Levy, The Nassau County School Tax Levy and charges for sewer  services;

     (2) "Base Taxes" shall be the Taxes due and payable by the  Owner for the
calendar year 1993 for General Tax and 1993/94 for  School Tax.

     (3) "Tax Year" shall mean each calendar year or part thereof during  the
term of this Lease.

     B. Except as hereinafter provided, if Taxes attributable to the  Premises
for any Tax Year exceed Base Taxes, the annual rent payable  under this Lease
shall be increased by an amount ("Tax Escalation")  equal to the amount by which
the Taxes attributable to the Premises  for such Tax year are greater than the
Base Tax.

     C. After the expiration of each Tax Year, Owner shall submit to Tenant a
written statement (the "Tax Statement") setting forth (i) Taxes  for such year,
and (ii) a computation of Tax Escalation for such Tax  Year and Tenant shall pay
such Tax Escalation to Owner within ten (10) days after Owner submits such Tax
Statement. Thereafter, until the  furnishing of the next Tax Statement, each
monthly installment of  annual rent hereunder shall be increased by an amount
equal to  one-twelfth (1/12th) of Tax Escalation for the preceding Tax year, as
an estimated monthly payment of Tax Escalation. Upon the furnishing by

<PAGE>

Owner of the next Tax Statement, the actual Tax Escalation shall be  determined
for that Statement's Tax Year, and (a) any underpayments  for said Tax year
shall be immediately payable by Tenant to Owner, and (b) any overpayments for
said Tax year shall be allowed as a credit to Tenant against the next rental
payment(s) due hereunder. Any delay by  Owner in submitting a Tax Statement
shall not constitute a waiver by  Owner of any of its rights under this Article.

     If the last year hereunder shall be less than twelve (1) months, the
amount of Tenants obligation for Tax Escalation for such lease year  shall be
appropriately prorated. Tenant's obligation to pay Tax  Escalation for the last
(or any earlier) lease year hereunder, shall  survive the expiration or earlier
termination of this Lease.

     42. Intentionally omitted.

     43. Intentionally omitted.

     44. Owner reserves the privilege of stopping the service of heat,  elevator
or other service systems at such times as may be necessary by reason of
accident, repairs, alterations or improvements desirable or  necessary to be
made, until such time as said repairs, alterations or  improvements shall have
been completed. Further, Owner shall not be  liable for any failure to supply
heat, elevator, electric current or  other service in the Building, due to
strikes, accidents or causes  beyond the control of Owner.

     45. Tenant agrees to carry, at the expense solely of Tenant, general
public liability insurance With a combined single limit of not less  than
$2,000,000 per occurrence with respect to death, personal injury  and property
damage. In the policies for all such insurance Owner  shall be named jointly
With Tenant as the insured as its interest may  appear. In the event that Tenant
elects to carry any other type or any further amount of public liability
insurance or insurance against  risks in which Owner is directly concerned,
Tenant agrees that policies for any such insurance shall be written in the joint
names of Tenant and Owner so that Owner will be protected as its interest may
appear. In addition, Tenant agrees to indemnify and hold harmless Owner from any
and all claims, loss, liability, damage and expense (including without
limitation reasonable legal fees) that may arise by reason of this Lease or of
Tenant's occupancy or use of the Premises.

     A certificate or a copy of the policies indicating the above mentioned
insurance coverage, together with proof of payment of all currently-due premiums
therefor, is to be delivered to Owner prior to the commencement of this Lease,
and same shall be kept current throughout the term hereof; in furtherance
thereof, Tenant shall deliver to Owner evidence of renewal of all such policies
(together with such proof of payment) at least fifteen (15) days prior to their
respective expiration dates. If Owner at any time determines that higher limits
of insurance coverage  and/or other types of insurance are then being required
of their  tenants by prudent Owners of buildings in the area similar to the
Building, Tenant shall promptly obtain such coverage, at the expense  solely of
Tenant, upon the instructions of Owner, and such coverage  shall otherwise
conform to the requirements of this Article.

<PAGE>

     46. Owner shall have the same remedies against Tenant for any failure  by
Tenant to make any required payment under this Lease as Owner has  under this
Lease for any failure by Tenant to pay rent. All of the  aforesaid required
payments shall be deemed to be additional rent  hereunder.

     47. The parties acknowledge that Schmergel Enterprises Corp. was the  sole
broker involved in this Lease, and that any compensation of such  broker in
connection herewith shall be made by Owner pursuant to a  separate agreement
between Owner and such broker. Each of the parties  indemnifies the other
against all claims, loss, liability and expense  (including without limitation
reasonable legal fees) in connection  with demands for brokerage commissions or
other compensation by any  other broker, purported broker or salesperson with
whom the indemnitor has dealt.

     48. If Tenant fails to make any payment (or portion  thereof) hereunder by
its due date, and if such failure is not fully  remedied within ten days after
such due date, interest shall accrue at  a 18% per annum rate. Said late charge
shall be deemed additional  rent. All such late charges for overdue amounts
shall be payable by  Tenant, as soon as they accrue.

     49. If Owner, by reason of the failure  of Tenant to keep, observe, or
perform any one or more of the  covenants, agreements or conditions in this
lease contained, pays any  sum of money, or does any act which requires the
payment of money, or  if Owner incurs any expense including reasonable
attorney's fees in  instituting, prosecuting, or defending any action or
proceeding  instituted by reason of any default of Tenant hereunder, then the
sum  or sums so paid or required to be paid together with all interest,  costs,
and damages shall be deemed to be and shall constitute  additional rent
hereunder, and shall be collectible in the same  manner and with the same
remedies as if they had been rents originally  reserved herein, and shall be due
from and payable by Tenant to Owner  on the first day of the month or fifteen
(15) days after notification  following the incurring of such respective
expenses or payments.

     50. Tenant shall from time to time, within ten days after Owner's request
therefor in each instance, execute, acknowledge and deliver to Owner a
certificate (a) identifying this  Lease and any amendments or modifications
hereto, and (b) stating (i)  whether or not Tenant has accepted possession of
the Premises, (ii)  the amount of rent then payable hereunder, including the
types and  amounts of all escalations included therein, (iii) the respective
dates through which rent and the various escalations have been paid,  (iv) that
this Lease is in full force and effect and that this Lease  is unmodified except
as may be noted under item (a) above, (v) that  there exists no default (or
other fact which, with one or both of the  passage of time or the giving of
notice' would constitute a default)  under this Lease, or, if Tenant claims any
such defaults exist, specifying the nature and extent thereof, (vi) any claim by
Tenant concerning incomplete Owner work at the Premises, and (vii) such other
information as Owner may request.  If

<PAGE>

Tenant fails to deliver any such  certificate within the said ten days, any
purchaser, lender or other  party interested in the information to be contained
therein shall be  entitled to rely on a certificate given by Owner or Owner's
agent with  respect to such information.

     51. This Lease shall not be binding on Owner unless and until it is
executed and delivered by Owner.

     52. A. The ground and underlying leases and mortgages referred to in
Article 7, to which this Lease is subject and subordinate, are  hereinafter
sometimes called "superior leases" and "superior  mortgages," respectively' and
the lessor of a superior lease or its  successor in interest at the time
referred to is hereinafter  sometimes called the "lessor" of such superior
lease. No  pre-payment of more than one month's fixed rent shall be valid or
binding upon the holder of a superior mortgage or the lessor of a  superior
lease unless expressly approved in writing by such holder or  lessor or any of
its predecessors in interest.

     B. In the event of any  act or omission of Owner which would give Tenant
the right,  immediately or after lapse of a period of time, to cancel or
terminate  this Lease, or claim a partial or total eviction, Tenant shall not
exercise such right (1) until it has given written notice of such act  or
omission to the holder of each superior mortgage and the lessor of  each
superior lease whose name and address shall previously have been  furnished to
Tenant in writing, and (2) unless such act or omission  shall be one which is
not capable of being remedied by Owner or such  mortgage holder or lessor within
a reasonable period of time, until a  reasonable period for remedying such act
or omission shall have  elapsed following the giving of such notice and
following the time  when such holder or lessor shall have become entitled under
such  superior mortgage or superior lease, as the case may be, to remedy the
same (which reasonable period shall in no event be less than the  period to
which Owner would be entitled under this Lease or  otherwise, after similar
notice, to effect such remedy) , provided  such holder or lessor shall with due
diligence give Tenant written  notice of intention to, and commence and
continue, to remedy such act  or omission.

     C. If the lessor of a superior lease or the holder of a superior  mortgage
shall succeed to Owner's estate in the Building or the rights  of Owner under
this Lease, whether through possession or foreclosure  action or delivery of a
new lease or a deed or otherwise, then at the  election of such party so
succeeding to Owner's rights wherein  sometimes called "successor owner"),
Tenant shall attorn to and  recognize such successor owner as Tenant's owner
under this Lease, and  shall promptly execute and deliver any instrument that
such successor owner may reasonably request to evidence such attornment. Tenant
hereby irrevocably appoints such successor owner Tenant's  attorney-in-fact to
execute and deliver such instrument for and on  behalf of Tenant. Tenant hereby
waives any right Tenant may have under  any present or future law to terminate
this Lease or surrender the  Premises by reason of the institution of any
proceeding to terminate a  superior lease or action to foreclose a superior
mortgage and this  Lease shall not be affected by any such proceeding or action
unless  and until the lessor of the

<PAGE>

superior lease, or holder of the superior  mortgage, elects in such proceeding
or action to terminate this Lease.

     D. If in connection with the procurement, continuation or renewal of  any
financing for which the Land and/or the Building or the interest  of the lessee
therein under a superior lease represents collateral in  whole or in part, an
institutional lender shall request reasonable  modifications of this Lease as a
condition of such financing, Tenant  will not withhold its consent thereto
provided that such modifications  do not increase the rents payable or
materially increase any of  Tenant's other obligations under this Lease or
materially and  adversely affect any rights of Tenant under this Lease.

     53. Tenant  shall look only to Owner's estate and interest in the Land and
the  Building (or the proceeds thereof) for the satisfaction of Tenant's
remedies for the collection of any judgment (or other judicial  process)
requiring the payment of money by Owner in the event of any  default by Owner
under this Lease, and no other property or assets of  Owner (or any of the
partners  that comprise Owner) shall be subject to levy, execution, or other
enforcement procedure for the satisfaction of Tenant's remedies  under or with
respect to this Lease, the relationship of owner and  tenant hereunder or
Tenant's use and occupancy of the Premises.

     54.  Tenant acknowledges that Owner is not performing any work in the
Premises and Tenant warrants and represents that it has inspected the  Premises
and accepts them as is.

     55. Intentionally omitted.

     56. Owner shall have the right at any time to name and change the name  of
the Building and to change the designated address of the Building.  The Building
may be named after any person, firm or otherwise, whether  or not such name is,
or resembles, the name of a tenant of the  Building.

     57. A. At any time subsequent to the Owner's performance of the  Initial
Installations, if Owner should consent to any changes proposed  to be made by
Tenant ("Tenant's changes") at the Premises, such Tenant's Changes shall be
performed in compliance with all applicable  requirements of insurance bodies
having jurisdiction, and in such  manner as not to interfere with, delay or
impose any additional  expense upon Owner in the construction, maintenance or
operation of  the Building, and so as to maintain harmonious labor relations in
the  Building. Tenant, at its expense, and with diligence and dispatch,  shall
procure the cancellation or discharge of all notices of  violation arising from
or otherwise connected with Tenant's Changes  which shall be issued by the
municipal building department or any  other public authority having or asserting
jurisdiction. Owner's  consent may be conditioned upon Tenant furnishing to
Owner such  security and insurance as Owner may require to protect Owner against
any loss or liability arising from Tenant's Changes.

<PAGE>

     B. Tenant shall reimburse Owner, fifteen (15) days after, for its
reasonable out-of-pocket costs and expenses relating to its evaluation  of
Tenant's request for consent to Tenant changes, including  reasonable charges
for architectural, engineering, legal and  administrative services incurred in
connection therewith.

     C. Tenant shall make all repairs to the Premises and the fixtures and
appurtenances therein as may be required by reason of one or more of  (1) the
making and existence of Tenant's changes in the Premises, (2)  the use,
operation and/or movement of Tenant's property in and out of  and within the
Premises, and (3) the misuse or neglect of Tenant or  any of its employees,
agents, licenses, invitees or contractors.

     58. Tenant shall (i) keep the Premises free of all hazardous  substances
including, without limitation, all pollutants, dangerous  substances, toxic
substances, hazardous wastes and hazardous  substances as defined or set forth
in or pursuant to or covered by the  Resource conservation and Recovery Act (42
U.S.C. Section 9601, et  seq.) as amended ("RCRA") , the Comprehensive
Environmental Response,  Compensation and Liability Act (42 U.S.C. Section 6901,
et seq.) as  amended ("CERCLA") , or any other federal, state or local
environmental law, ordinance, rule or regulation (collectively, the  "Hazardous
Substances") , (ii) keep the Premises in full compliance  with all other
provisions of federal, state and local environmental  and health laws,
ordinances, rules or regulations including, without  limitation, RCRA and CERCLA
(the "Environmental Law") , and (iii) pay  all costs and expenses incurred in
connection with the removal of the  Hazardous Substances from the Premises
and/or compliance with the  Environmental Law. Tenant shall indemnify, defend
and hold Owner, its  successors and assigns harmless from and against any and
all  liability, reasonable cost and expense, including, without limitation,
attorneys fees and disbursements, which Owner may incur arising out of,  caused
by, relating to or resulting from the presence of Hazardous  Substances at the
Premises from and after the date of the Lease or  Tenant's failure to comply
with its obligations hereunder including'  without limitation, any and all
personal injury claims caused by or  arising out of or with respect to the
presence of Hazardous Substances  at the Premises. Notwithstanding anything
contained in the lease to  the contrary, Tenant shall remain liable for the
performance of its  obligations as set forth in this Article 58.

     59. If a structural alteration or major mechanical alteration of the
Premises shall be required by law or public authority which Tenant is  not
obligated to make pursuant to Article 6, Owner shall have the  option of making
such alteration at its expense or terminating this  Lease on at least thirty
days notice to Tenant to such effect.  However, such notice of termination shall
become ineffective if,  within fifteen days after receipt of such notice, Tenant
shall notify  Owner that Tenant will make such alteration. Thereupon, Tenant
shall  become obligated to and shall make such alteration at its expense and
with due diligence and speed as a Tenant's change.

     60. A. A year-round variable volume air conditioning system capable of
maintaining an average temperature of 78 F (plus or minus 2 ) and an

<PAGE>

average relative humidity of 50% when outside conditions are 95 DB, 76 F WB,
shall be furnished and installed. Maintained temperatures shall  be as above
unless otherwise required by law or governmental  guideline.  All heating will
be provided from perimeter baseboard radiation with  the heat output controlled
by inside air temperature to maintain  average inside air temperature conditions
of 70 F (plus or minus 2 F)  when outside air temperature is 10 F or more. Said
temperatures  subject to change as required by law or governmental guideline.
The  proper performance of the heating, ventilating and air-conditioning  (HVAC)
system serving the Premises is based upon a maximum density of  one person per
140 net usable square feet, a maximum electric heat  gain of 4 watts per net
usable square foot and a supply of 0.10 CFM of  fresh air per net usable square
foot. Owner shall not be responsible  for the proper performance of such HVAC
system if the Premises (or any  room or area thereof) shall be subjected to a
greater population  density or a greater heat gain than above specified, if the
partitioning in the Premises shall be rearranged in such manner as to  interfere
with the normal operations of the HVAC system in the  Premises, if the windows
and the public corridor entrance doors of the  Premises shall not be kept
closed, or if the blinds shall not be  lowered in windows of the Premises when
exposed to the sun. Owner  shall have free and unrestricted access to all HVAC
equipment located  in or accessible through the Premises. B. If Tenant shall
require HVAC  service at any time other than between 8:00 A.M. and 6:00 P.M. on
a  business day or between 9:00 A.M. and 1:00 P.M. on Saturday, Owner  shall
furnish such service (herein called "after hours  air-conditioning service")
upon reasonable advance notice from Tenant  and Tenant shall pay Owner's then
established charges therefor on  Owner's demand. Such charges shall not exceed
125% of Owner's actual  cost of labor, utilities and supplies used in providing
such after  hours air-conditioning service. If any of the other tenants of the
Building in the same air conditioning zone shall receive after hours  air-
conditioning service, pursuant to Owner's obligation to provide  the same to
them (whether for a similar charge or without separate  charge) at the same time
as Tenant, only a portion of such labor and  utilities costs as shall be
incurred for such common service, in the  ratio of the rentable area of the
Premises and the premises of such  other tenants so served, shall be included in
the costs upon which the  charge to Tenant is based. Otherwise, no adjustment in
the charge to  Tenant shall be made for other tenants' use of their premises
when  after hours air-conditioning service is being provided to the Premises  at
Tenant's request.

     61. Tenant agrees not to look to the mortgagee, as mortgagee,  mortgagee in
possession, or successor in title to the Building, for  accountability for any
security deposit required by Owner hereunder,  unless said sums have actually
been received by said mortgagee as  security for Tenant's performance of this
Lease.

     62. Intentionally omitted.

     63. In the event the Tenant does not vacate  the Premises upon the
expiration date of this Lease, or upon the  expiration of any renewal option,
then in that event or events, the  Tenant shall remain as month to month Tenant
at a monthly rental of  125% of the monthly annual and

<PAGE>

additional rent payable in the last  month of the then current term. The
acceptance by the Owner of such  rental after termination of this Lease shall
not be construed as  consent of continued occupancy.

     64. Tenant represents that on the date hereof Tenant (a)  is a  corporation
duly organized, validly existing and in good standing under  the laws of the
State of Delaware, (b) has the fully power and  authority to enter into and
perform its obligations under this Lease and (c) has taken all actions  and
obtained all consents and approvals required pursuant to Tenant's  certificate
of Incorporation and by-laws in connection with this  Lease. The execution and
delivery of this Lease and the consummation  of the transactions contemplated
hereby will not violate or constitute  a breach of or a default under any
agreement or instrument to which  Tenant is a party or by which it is or may be
bound and such  execution, delivery and consummation does not violate any law,
order  or regulation of any governmental authority having jurisdiction over
Tenant.

     65. Tenant shall not bring or permit to be brought or kept in  or on the
Premises, any coin vending machines.

     66. Owner shall furnish  and install all lighting tubes, lamps, bulbs and
ballasts used in the  Premises, and Tenant agrees to purchase same, from the
Owner, and  shall pay Owner's reasonable charges therefor and the installation
thereof on demand, as additional rent.

     67. Tenant, at Tenant's sole cost and expense, shall have the right to
install a sign with Tenant's name on the entrance door of the Tenant's
Premises. All signs are subject to Owner's approval, which approval  shall not
be unreasonably withheld.

     68. Tenant shall be entitled to  two (2) listings on the Building's
directory. Owner shall install the  initial listing, at Owner's cost, upon
request by Tenant.

     69. Either  Tenant or Owner may terminate the lease at any time after
October 31,  1994 upon giving thirty (30) days prior written notice (the
"Termination Notice") to the other party and upon the giving of the  Termination
Notice by either party the term of this Lease shall  automatically expire on the
last day of the month which succeeds the  month in which the Termination Notice
was given. The Termination  Notice, once given, shall be nonrevocable.

SEAGULL ASSOCIATES
PAUL SCHERGEL & SONS


John P. Schmergel

COMPUFLIGHT, INC.

Russell K. Thal
President

<PAGE>

FIRST AMENDMENT OF LEASE made this 7 day of October, 1994, between SEAGULL
ASSOCIATES, a partnership, with offices at 80 Davids Drive, Hauppauge, New York
11788 (hereinafter referred to as "Owner") and COMPUFLIGHT, INC., a corporation,
with offices at 99 Seaview Boulevard, Port Washington, New York 11050
(hereinafter referred to as "Tenant").

WHEREAS, the parties hereto are parties to a lease made as of the 31st day of
March, 1994, with reference to space on the third floor of the building known as
99 Seaview Boulevard, Port Washington, New York; and WHEREAS, the parties are
desirous of amending said lease.

NOW, THEREFORE, it is mutually agreed as follows:

1.   The term of the lease shall expire on December 31, 1995 in place and
instead of April 30, 1997.

2.   The rental as set forth on the first page of the lease shall be amended so
that for the period commencing January 1, 1995 and terminating December 31,
1995, the monthly rental shall be $4,000.00 in place and instead of the rental
as set forth in the lease.

3.   Paragraph 69 of the lease is deleted in its entirety.

4.   In all other respects the parties ratify and affirm the lease made as of
March 31, 1994.

IN WITNESS WHEREOF, the parties hereto have executed this First Amendment of
Lease under seals the day and year first above written.


                              SEAGULL ASSOCIATES


                              By:
                                 -----------------------


                              COMPUFLIGHT, INC.


                              By:
                                 -----------------------

SECOND AMENDMENT OF LEASE made as of this 22 day of November, 1995, between
SEAGULL ASSOCIATES, a partnership, with offices at 80 Davids Drive, Hauppauge,
NEW York 11788 (hereinafter referred to as "Owner") and COMPUFLIGHT, INC., a
corporation, having its principal place of business at 99 Seaview Boulevard,
Port Washington, New York 11050 (hereinafter referred to as "Tenant").

                              W I T N E S S E T H:

WHEREAS, the parties hereto are parties to a Lease made as of the 31st day of
March, 1994, as amended the 7th day of October, 1994, with

<PAGE>

reference to space in the building known as 99 Seaview Boulevard, Port
Washington, New York; (the "Lease") and

WHEREAS, the parties are desirous of further amending the said Lease;

NOW, THEREFORE, it is mutually agreed as follows:

1.   The term of the lease shall be extended for three (3) years commencing
January 1, 1996, and terminating December 31, 1998;

2.   During the first year of the extended term the monthly rental shall be
$4,160.00; during the second year of the extended term the monthly rental shall
be $4,326.40; during the third year of the extended term the monthly rental
shall be $4,499.46;

3. Landlord, shall recarpet the Premises. Tenant shall be responsible for
moving all furniture with the assistance of Seagull's maintenance staff so as to
make the area accessible to recarpeting. Tenant agrees to pay to Landlord one
half the cost of the furnishing and installing said carpet.

4. In all other respects the parties ratify and affirm the Lease made as of the
31st day of March, 1994 as amended the 7th day of October, 1994.

IN WITNESS WHEREOF, the parties hereto have executed this Second Amendment of
Lease under seal the day and year first above written.



                              SEAGULL ASSOCIATES


                              By:
                                 -----------------------


                              COMPUFLIGHT, INC.


                              By:
                                 -----------------------