WHEN RECORDED, RETURN TO:

Zions First National Bank
Commercial Loan Department
P.O. Box 25822 One South Main Street
Salt Lake City, Utah 84125
Attn: Michael R. Brough


                              ASSIGNMENT OF LEASES


         This Assignment of Leases (the  "Assignment") is made and executed this
31st day of May,  2000 (the  "Closing  Date"),  by Evans &  Sutherland  Computer
Corporation,  a Utah  corporation  ("Assignor") and Zions First National Bank, a
national banking association ("Assignee").

                                    RECITALS

         A.  Pursuant to the  Promissory  Note dated the  Closing  Date in which
Assignor  appears as "Borrower" and Assignee appears as "Lender" and which is in
the original principal amount of Fifteen Million Dollars  ($15,000,000.00)  (the
"Note"),  and  pursuant to the Loan  Agreement  dated the Closing  Date  wherein
Assignor  appears as  "Borrower"  and  Assignee  appears as "Lender"  (the "Loan
Agreement"), Assignee has loaned the proceeds of the Note to Assignor.

         B. Pursuant to the Trust Deed,  Assignment of Rents, Security Agreement
and Fixture  Filing dated the Closing Date (the "Trust Deed") in which  Assignor
appears as "Trustor"  and Assignee  appears as "Trustee" and  "Beneficiary"  and
which  encumbers  Assignor's  `right,  title  and  interest  in and to the  real
property (the "Property") together with the improvements thereon located in Salt
Lake  County,  State of Utah,  and more  particularly  described  in  Exhibit  A
attached  hereto and  incorporated  herein by this  reference  (the  "Project"),
Assignor has granted Assignee a lien on its leasehold interest in the Project to
secure the Note.

         C. The following leases currently affect the Project:

                  1. The  Lease  Agreement  dated  January  20,  1999,  in which
         Assignor, appears as "Landlord", and Parametric Technology Corporation,
         a  Massachusetts  corporation,  appears  as  "Tenant",  and any and all
         amendments thereto (the "Parametric Lease").

                  2.  The  Lease  Agreement  dated  March  21,  1996,  in  which
         Assignor,  appears as "Landlord",  and Westin Hotel Company, a Delaware
         corporation,  appears as "Tenant",  and any and all amendments  thereto
         (the "Westin Hotel Lease").

                  3. The Lease  Agreement dated June 3, 1999, in which Assignor,
         appears as "Landlord", and Sanmina Corporation, a Delaware corporation,
         appears as "Tenant",  and any and all amendments  thereto (the "Sanmina
         Lease").

<PAGE>

                  4. The Lease  Agreement dated May 19, 1995, in which Assignor,
         appears  as  "Landlord",  and  DJH  Engineering  Center,  Inc.,  a Utah
         corporation,  appears as "Tenant",  and any and all amendments  thereto
         (the "DJH Engineering Lease").

                  5. The  Lease  Agreement  dated  November  1,  1997,  in which
         Assignor,  appears as  "Landlord",  and  Western  Systems  Coordinating
         Council,  a Utah  corporation,  appears  as  "Tenant",  and any and all
         amendments thereto (the "Western Systems Lease").

         D. There have been and/or may be other lease agreements entered into by
Assignor and tenants of the Project, from time to time, all subject to the terms
and conditions of the Loan Documents.

         E. Assignee  desires and Assignor agrees to further secure the Note and
the  Loan  Agreement  with  an  assignment  of the  leases,  including,  without
limitation,  the  Parametric  Lease,  Westin Hotel  Lease,  Sanmina  Lease,  DJH
Engineering Lease and Western Systems Lease.

                                    AGREEMENT

         In exchange for good and valuable  consideration  the  sufficiency  and
receipt  of which  are  hereby  acknowledged,  Assignor  and  Assignee  agree as
follows:

         1. Assignment.  Assignor hereby absolutely and unconditionally  assigns
and transfers unto Assignee all right, title, and interest of Assignor in and to
all  leases of the  Project or any  portion  of the  Project,  now  existing  or
hereafter  created,  including,  without  limitation,  the Parametric Lease, the
Westin  Hotel Lease,  the Sanmina  Lease,  the DJH  Engineering  Lease,  and the
Western  Systems  Lease,  together with all amounts  received for the use of any
portion of the Project, and all proceeds from such leases,  covering the Project
or any  portion of the  Project,  now or  hereafter  existing  or entered  into,
together  with all right,  title and  interest  of  Assignor in and to all other
leases or subleases  covering the Project or any portion of the Project,  now or
hereafter existing or entered into,  together with all security deposits made by
the  lessees  thereunder  (the  "Lessee" or  "Lessees")  and  together  with all
extensions,  renewals,  modifications  or replacements  thereof,  as well as all
guaranties of Lessee's  obligations  under any provisions  thereof and under any
and all extensions and renewals thereof (collectively the "Lease").

         2. License to Collect.  This  Assignment  shall inure to the benefit of
Assignee,  and its successors and assigns,  for the payment of the principal and
interest  provided  to be  paid  in or by  the  Note,  the  performance  of  the
agreements of Assignor  contained in the Loan  Agreement and the Trust Deed, and
the  performance of the  agreements of Assignor  contained in the Loan Documents
and any other  document  evidencing,  securing,  or relating to the disbursal or
administration  of the  proceeds  of the  Note  (all  of  which  agreements  and
obligations  are  collectively  referred to as the  "Obligation"),  reserving to
Assignor,  however,  a  revocable,  temporary  right and  license to collect and
apply, except as hereinafter  provided,  the rents, income, and profits accruing
by virtue of the Lease as they respectively become due (the "License"),  but not
more than one month in advance,  and to enforce the agreements of the Lease,  as

<PAGE>

long as Assignor  does not default  beyond any  applicable  grace or cure period
under the Obligation, or this Assignment.

         3. Assignee as Creditor of Lessee.  From and after the occurrence of an
Event of Default,  Assignee,  and not  Assignor,  shall be the  creditor of each
Lessee in respect of  assignments  for the benefit of creditors and  bankruptcy,
reorganization,  insolvency,  dissolution, or receivership proceedings affecting
such Lessee. Assignee,  however, shall not be the party obligated to make timely
filings of claims in such proceedings or to otherwise pursue  creditor's  rights
therein.  Assignee  shall have the option to apply any monies  received by it as
such  creditor  towards  the  reduction  of the  principal  or  interest  of the
Obligation.

         4.  Default  Remedies  of  Assignee.  If Assignor  defaults  beyond any
applicable grace or cure period on the Obligation or this Assignment,  and until
such default shall have been fully cured, the License of Assignor to collect and
apply rents,  income,  and profits  shall cease and  terminate.  Assignee  would
thereby be authorized at its option to enter and take  possession of all or part
of the  Project,  and to  perform  all  acts  necessary  for the  operation  and
maintenance  of the  Project  in the same  manner  and to the same  extent  that
Assignor  might  reasonably so act. In  furtherance  thereof,  Assignee shall be
authorized,  but  shall  be under  no  obligation  (unless  Assignee  has  taken
possession  or control of the Project or any  portion  thereof or  succeeded  to
Assignor's interest in the Project),  to collect the rents,  income, and profits
arising  from the Lease,  and to enforce  performance  of any other terms of the
Lease including,  but not limited to,  Assignor's rights to fix or modify rents,
sue for possession of the Project, or any part thereof, relet all or part of the
Project,  and  collect  all rents,  income,  and  profits  under such new lease.
Assignee  shall,  after payment of all proper costs,  charges,  and any damages,
apply  the net  amount of  income  to the sums  then due to  Assignee  under the
Obligation  as set  forth  in the  Loan  Agreement.  Assignee  shall  have  sole
discretion  as to the manner in which such net income is applied to the  amounts
outstanding under the Note, and the items that shall be credited thereby.

         5. Termination of Assignment.  When Assignor pays Assignee for the full
amount  of  the   Obligation  and  such  payment  is  evidenced  by  a  recorded
satisfaction or release of the Trust Deed, this Assignment shall no longer be in
effect and shall be void.

         6. Notice to Lessees of Assignor's Default.  Assignor shall irrevocably
authorize  each  Lessee,  upon  demand and notice from  Assignee  of  Assignor's
default beyond any applicable grace or cure period under the Obligation,  to pay
all rents,  income, and profits under the Lease to Assignee.  In such situation,
Assignee  shall  not be liable to Lessee  for the  determination  of the  actual
existence of any default  claimed by Assignee.  Lessees  shall have the right to
rely upon any such notices of Assignee that Lessees shall pay all rents, income,
and profits to Assignee,  without any  obligation  or right to inquire as to the
actual  existence of the default,  notwithstanding  any claim of Assignor to the
contrary and shall have  assurance  that payment to Assignee  shall satisfy that
particular  payment  obligation  under the Lease.  Assignor  shall have no claim
against  Lessees for any rents paid by Lessees to  Assignee.  Upon the curing of
all defaults caused by Assignor under the Obligation, Trust Deed, or Assignment,
Assignee shall give Lessees written notice of such cure, and  thereafter,  until
further notice from Assignee,  Lessees shall pay the rents,  income, and profits
to Assignor.

<PAGE>

         7. Assignment of Assignor's Interest in Lease.  Assignee shall have the
right to  assign  Assignor's  right,  title,  and  interest  in the Lease to any
subsequent  holder of the Trust  Deed and to any person  acquiring  title to the
Project through foreclosure or otherwise.  After Assignor shall have been barred
and foreclosed of all right,  title,  interest,  and equity of redemption in the
Project,  no  assignee  of  Assignor's  interest in the Lease shall be liable to
account to Assignor for the rents, income and profits thereafter accruing.

         8.  Indemnification of Assignee.  Assignor shall pay, protect,  defend,
indemnify and hold Assignee harmless of and from any and all liability, loss, or
damage that  Assignee may incur under the Lease or by reason of this  Assignment
other than such  liability,  loss,  or damage as may be occasioned by Assignee's
gross negligence or willful misconduct.  Such  indemnification  shall also cover
any and all  claims  that may be  asserted  against  Assignee  by  reason of any
alleged  obligation to be performed by Assignee  under the Lease or  Assignment.
Nothing in this paragraph shall be construed to bind Assignee to the performance
of any Lease  provisions,  or to otherwise  impose any  liability  upon Assignee
including, without limitation, any liability under the Lease's covenant of quiet
enjoyment in the event that any Lessee shall have been joined as party defendant
in any action to foreclose the Trust Deed and shall have been barred  thereby of
all right,  title,  interest,  and equity of redemption  in the  premises.  This
Assignment  shall not impose  liability  upon  Assignee  for the  operation  and
maintenance of the premises or for carrying out the Lease terms before  Assignee
has entered and taken possession of the Project.  Any loss or liability incurred
by  Assignee in the  defense of any claims  shall,  at  Assignee's  request,  be
reimbursed by Assignor. Such reimbursement shall include interest at the default
rate set forth in the Note, all reasonable costs, expenses, and attorneys' fees.
Assignee may, upon entry and taking of  possession,  collect the rents,  income,
and profits, and apply them toward reimbursement for the loss or liability.

         9. Quality of Assignor's Title to Lease.  Assignor represents itself to
be the  absolute  owner  of the  lessor's  interest  in and to the  Lease,  with
absolute right and title to assign it and the rents,  income, and profits due or
to become due thereunder; that the Lease is valid, in full force and effect, and
has not been  modified  or  amended  except as stated  herein;  that there is no
outstanding  assignment or pledge thereof or of the rents,  income,  and profits
due or to become due thereunder;  that there are no existing  defaults under the
provisions  thereof  on the part of any party;  that  Lessees  have no  defense,
setoff or  counterclaim  against  Assignor,  that Lessees are in possession  and
paying rent and other charges under the Lease as provided  therein;  and that no
rents,  income,  and profits  payable  thereunder have been or will hereafter be
anticipated,  discounted, released, waived, compromised, or otherwise discharged
except as may be expressly  permitted by the Lease.  Assignor  covenants  not to
cancel, abridge,  surrender, or terminate the Lease or materially change, alter,
or modify it other than in the ordinary course of business, either to reduce the
amount of the rents,  income,  and  profits  payable  thereunder,  or  otherwise
materially  change,  alter,  abridge or modify the Lease, or make any subsequent
assignment  of the Lease,  or consent to  subordination  of the  interest of any
Lessee in the Lease without the prior written  consent of Assignee which consent
shall not be  unreasonable  withheld.  Any attempt at  cancellation,  surrender,
termination, change, alteration,  modification,  assignment, or subordination of
the Lease without the written consent of Assignee shall be null and void.

<PAGE>

         10.  Delivery of  Necessary  Instruments  to Assignee.  Assignor  shall
execute and deliver to Assignee and hereby irrevocably  appoints  Assignee,  its
successors,  and assigns,  from and after the occurrence of an Event of Default,
as its  attorney  in  fact  to  execute  and  deliver  during  the  term of this
Assignment,  all further instruments as Assignee may deem necessary to make this
Assignment  and any further  assignment  effective.  The power hereby granted is
coupled with an interest in the Project and is irrevocable.

         11.  Transfer of Title to  Lessees;  Cancellation  of Lease.  The Lease
shall remain in full force and effect  despite any merger of Assignor's  and any
Lessee's  interest  thereunder.  In the  event the  Lease  permits  cancellation
thereof  on  payment of  consideration  and the  privilege  of  cancellation  is
exercised, the payments made or to be made by reason thereof are hereby assigned
to Assignee to be applied, at the election of Assignee,  to reduce the amount of
the  principal of the  Obligation in the inverse order of maturity or to be held
in trust by Assignee as further security without interest for the payment of the
principal and interest provided to be paid by the Obligation.

         12. Lease  Guaranties;  Assignment of Lease;  Alterations  of Premises.
Assignor  shall not alter,  modify,  cancel or terminate  any  guaranties of the
Lease  without the  written  consent of  Assignee,  which  consent  shall not be
unreasonably  withheld.  Assignor  shall not consent to any Lease  assignment or
subletting,  nor agree to a subordination  of the Lease to any mortgage or other
encumbrance, other than that of Assignee, now or hereafter affecting the Project
without   Assignee's  prior  written   consent,   which  consent  shall  not  be
unreasonably  withheld.  Assignor  shall not permit a material  alteration of or
addition to the Project by any Lessee without  Assignee's  prior written consent
unless the right to alter or enlarge is expressly reserved by such Lessee in the
Lease.

         13.  Assignor to Ensure  Continued  Performance  under Lease.  Assignor
shall not execute any other assignment of the Lease, of any interest therein, or
of any rents payable thereunder. Assignor shall perform in all material respects
all of its  covenants as Lessor  under the Lease,  and shall not permit to occur
any release of liability of any Lessee,  or any  withholding of rent payments by
any Lessee.  Assignee shall promptly receive from Assignor copies of all notices
of default Assignor has sent any Lessee.  Assignor shall, at Assignee's request,
enforce the Lease and all  remedies  available to Assignor  thereunder  upon any
Lessee's default thereunder.

         14. Changes in Obligation Terms.  Notwithstanding  any variation of the
terms of the Obligation and/or the Trust Deed including  increase or decrease in
the principal  amount thereof or in the rate of interest  payable  thereunder or
any extension of time for payment  thereunder or any release of part or parts of
the real property  subject to the Trust Deed, the Lease and the benefits  hereby
assigned shall continue as additional  security in accordance  with the terms of
this Assignment.

         15.  Additions  to and  Replacement  of  Obligation.  Assignee may take
security in addition to the security  already given  Assignee for the payment of
the principal and interest provided to be paid in or by the Obligation or by the
Trust Deed or release such other  security,  and may release any party primarily
or secondarily liable on the Obligation, may grant or make extensions, renewals,
modifications,  or indulgences  with respect to the Obligation or Trust Deed and

<PAGE>

replacements  thereof,  which replacement of the Obligation or Trust Deed may be
on the same or on terms  different  from the present terms of the  Obligation or
Trust  Deed,  and  may  apply  any  other  security  thereof  held  by it to the
satisfaction  of  the  Obligation,  without  prejudice  to  any  of  its  rights
hereunder.

         16. Future and Additional  Leases.  This Assignment  shall apply and be
effective with respect to any and all leases with respect to the Project entered
into by  Assignor  and any lessee  which may cover or affect any  portion of the
Project,  which  lease(s)  may be entered into at any time during the period the
Obligation  remains  outstanding  and secured by the Trust Deed,  regardless  of
whether such lease(s)  is/are in effect on the date this Assignment is executed.
Upon the written request of Assignee, Assignor shall give Assignee prompt notice
and  provide  Assignee  with a copy of any lease  covering  any  portion  of the
Project it enters into, if the lease is not listed in this  Assignment or is not
in effect on the date of this  Assignment.  Upon  notice  from  Assignee to that
effect,  such  lease  shall be  deemed  included  in this  Assignment  as though
originally  listed  therein,  and shall be  subject  to this  Assignment  in all
respects.

         17. Exercise of Assignee's  Rights.  Assignee's failure to avail itself
of any of its rights  under this  Assignment  for any period of time,  or at any
time or times,  shall not  constitute a waiver  thereof.  Assignee's  rights and
remedies  hereunder are cumulative,  and not in lieu of, but in addition to, any
other rights and  remedies  Assignee  has under the  Obligation  and Trust Deed.
Assignee's  rights and remedies  hereunder may be exercised as often as Assignee
deems expedient.

         18.  Amendment,   Modification,   or  Cancellation  of  Assignment.  No
amendment,  modification,  cancellation,  or  discharge  hereof,  or of any part
hereof, shall be enforceable without Assignee's prior written consent.

         19.  Notices.  All  notices  shall be in writing and shall be deemed to
have been sufficiently given or served when personally  delivered,  deposited in
the United States mail, by  registered  or certified  mail, or deposited  with a
reputable  overnight  mail carrier  which  provides  delivery of such mail to be
traced, addressed as follows:

      Assignee:                          Zions First National Bank
                                         Commercial Loan Department
                                         P.O. Box 25822
                                         One South Main Street
                                         Salt Lake City, Utah 84125
                                         Attn: Michael R. Brough

      With copies to:                    Callister Nebeker & McCullough
                                         Gateway Tower East, Suite 900
                                         10 East South Temple
                                         Salt Lake City, Utah 84133
                                         Attn: T. Richard Davis

      Assignor:                          Evans & Sutherland Computer Corporation
                                         600 Komas Drive
                                         Salt Lake City, Utah 84108
                                         Attn: Chief Financial Officer

                                         Evans & Sutherland Computer Corporation
                                         600 Komas Drive
                                         Salt Lake City, Utah 84108
                                         Attn: Treasurer

      With copies to:                    Snell & Wilmer, L.L.P. Law Offices
                                         15 West South Temple, Suite 1200
                                         Gateway Tower West
                                         Salt Lake City, Utah 84101
                                         Attn: Brian D. Cunningham

Such  addresses  may be changed by notice to the other  party  given in the same
manner provided in this Section.

         20. Binding  Effect.  All agreements  herein shall inure to the benefit
of, and bind the respective heirs, executors,  administrators,  successors,  and
assigns of Assignor and Assignee.

         21.  Governing Law. This Assignment shall be governed by, construed and
interpreted in accordance with the laws of the State of Utah.

         22. Attorney Fees. Upon the occurrence of an Event of Default, Assignee
may employ an attorney or  attorneys  to protect  Assignee's  rights  under this
Assignment,  and Assignor shall pay Assignee  reasonable attorney fees and costs
actually  incurred  by  Assignee,  whether or not action is  actually  commenced
against  Assignor by reason of such breach.  Assignor shall also pay to Assignee
any reasonable  attorney fees and costs incurred by Assignee with respect to any
insolvency or bankruptcy  proceeding or other action  involving  Assignor or any
guarantor as a debtor. If Assignee  exercises the power of sale contained in the
Trust  Deed  or  initiates  foreclosure  proceedings,  Assignor  shall  pay  all
reasonable  costs  incurred and attorney fees and costs as provided in the Trust
Deed.

         23.  Defined  Terms.  Unless  otherwise  defined  in  this  Assignment,
capitalized  terms used in this Assignment  shall have the meanings set forth in
the Loan Agreement.

         DATED: March 31, 2000.

                             ASSIGNOR

                             EVANS & SUTHERLAND COMPUTER CORPORATION,
                             a Utah corporation


                             By:      /S/ R. GAYNOR
                                      Richard J. Gaynor
                                      Vice President and Chief Financial Officer



                            ASSIGNEE

                            ZIONS FIRST NATIONAL BANK,
                            a national banking association



                            By:       /S/ M. BROUGH
                                      Michael R. Brough
                                      Vice President


<PAGE>




STATE OF UTAH     )
                                            : ss.
COUNTY OF SALT LAKE        )

         The foregoing  instrument was  acknowledged  before me this day of May,
2000, by Richard J. Gaynor,  Vice President and Chief Financial Officer of Evans
& Sutherland Computer Corporation, a Utah corporation.


                                  NOTARY PUBLIC

My Commission Expires:     Residing At:





STATE OF UTAH     )
                                      : ss.
COUNTY OF SALT LAKE        )

         The foregoing  instrument was acknowledged  before me this _____ day of
May, 2000, by Michael R. Brough,  Vice President of Zions First National Bank, a
national banking association.


                                  NOTARY PUBLIC

My Commission Expires:     Residing At:






<PAGE>


                                    EXHIBIT A

                            REAL PROPERTY DESCRIPTION


         The real property located in Salt Lake County,  State of Utah, and more
particularly described as follows:

                            [SEE ATTACHED EXHIBIT A]