SIXTH AMENDMENT TO LEASE

   THIS SIXTH AMENDMENT TO LEASE is made as of March 26, 1998 between PETULA 
ASSOCIATES, LTD., an Iowa corporation and EQUITY FC, LTD., an Iowa corporation
(collectively, "Lessor"), and SEQUENT COMPUTER SYSTEMS, INC., an Oregon 
corporation ("Lessee").

                                RECITALS

   A. Lessor and Lessee are parties to that certain Lease Agreement dated May 
8, 1987 (the "Lease Agreement") and the following documents (the 
"Amendments"), which amend such Lease Agreement (the Lease Agreement 
and all such Amendments are herein collectively referred to as the 
"Lease"):

      1. First Amendment dated September 13, 1991;
      2. Second Amendment dated August 13, 1992;
      3. Third Amendment dated December 2, 1992;
      4. Fourth Amendment dated April 5, 1993; and
      5. Fifth Amendment dated September 30, 1997.
    
   B. Capitalized terms not defined in this Amendment have the meanings set 
forth in the Lease.

   C. Lessor and Lessee desire to amend the Lease as set forth herein.

                               AGREEMENT

1. LEASE REVISIONS.

   1.1 Exercise Notice.  Section 6.2.1 of the Lease is hereby deleted and the 
following is inserted in its place:

          "6.2.1  Lessee must give written notice (herein the "Notice") of the
       exercise of the Option to Purchase, which Notice shall be delivered to
       Lessor no earlier than February 1, 1998 and no later than April 1, 1998,
       and any attempted exercise of the Option to Purchase at any other time 
       shall be null, void and of no legal effect; and"

   1.2 Defined Term Change.  All references in Section 6.3.2 and 6.4.2 of the 
Lease to the "Expiration Date of the Initial Term" or the "Expiration 
Date" are hereby changed to references to April 1, 1998.

   1.3 Title.  Section 6.4.1 of the Lease is hereby deleted and the following 
is inserted in its place:

          "6.4.1  Title.  The closing of the purchase and sale of the Property
       (herein the "Closing") shall take place in escrow at a title company 
       selected by Lessor (herein the "Escrow Agent").  The date that the 
       Statutory Special Warranty Deed referenced in Section 6.4.4 is recorded
       and the Escrow Agent is in a position to disburse all funds to Lessor is
       herein referred to as the "Date of Closing" or the "Closing Date."  
       Lessor has furnished to Lessee and Lessee has reviewed that 6th 
       Supplemental Preliminary Title Report dated March 18, 1998, Title Number
       W186736H, issued by Transnation Title Insurance Company (the "Title 
       Report") which Title Report describes the condition of title to the 
       Property and other property.  Lessor and Lessee agree that the following
       exceptions in the Title Report are herein referred to as "Permitted 
       Exceptions:" 7 and 8 (provided the reference to each exception in the 
       Statutory Special Warranty Deed described in Section 6.4.4 and the 
       Owner's Policy of Title Insurance described in Section 6.4.3 states that
       all assessments have been paid in full as of Closing), 54, 55, 56, 58, 
       59, 60, 61, 62, 66 and 67.  Notwithstanding anything to the contrary 
       herein set forth, the following are and shall be deemed to be Permitted
       Exceptions: reservations in Federal patents; Conditions, Covenants and 
       Restrictions; beneficial easements; easements that serve real property 
       in the general vicinity of the Property and that do not unreasonably 
       interfere with the use and enjoyment of the Premises; and, if the 
       purchase price is the Set Option Price, all local improvement district
       assessments levied against the Property or any portion thereof.  
       Lessor agrees not to place any mortgage or trust deed upon the Property
       to secure payment of a sum in excess of the Set Option Price unless the
       same contains a covenant that the Property will be released or reconveyed
       upon payment to the holder thereof of an amount equal to or less than 
       the Set Option Price."

   1.4 Delays in Closing.  Section 6.4.2 of the Lease is hereby deleted and 
the following is inserted in its place:

          "6.4.2  Delays in Closing.  The Closing shall occur on April 1, 1998.
       Lessee shall have no right to close the purchase of the Property absent
       simultaneously closing the purchase of (i) the land and improvements 
       covered by the second building lease between Lessor and Lessee dated 
       May 8, 1987, as amended by letter dated January 12, 1988, Addendum of 
       1987 (undated) and amendments dated July 28, 1988, September 13, 1991, 
       December 2, 1992, April 5, 1993, September 30, 1997 and of even date with
       this Amendment (collectively, the "Second Lease") and (ii) the land and
       improvements covered by the third building lease between Principal 
       Mutual Life Insurance Company and Petula Associates, Ltd., together as 
       lessor, and Lessee, as lessee, dated July 28, 1988, as amended by 
       amendments dated July 28, 1989, September 13, 1991, December 2, 1992, 
       April 5, 1993, September 30, 1997 and of even date with this Amendment 
       (collectively, the "Third Lease").  Any failure by Lessee to close the 
       purchase of the land and improvements covered by the Second Lease and 
       Third Lease on April 1, 1998 shall be deemed a rescission of the 
       exercise of the Option to Purchase the Property pursuant to Section 6.

          "In the event the Closing does not occur on April 1, 1998, then 
       (i) Lessor shall continue to lease to Lessee and Lessee shall continue 
       to lease from Lessor the Premises at the rental and upon all of the 
       terms and conditions set forth in this Lease until the Closing occurs 
       as provided herein or until the expiration or termination of this Lease, 
       whichever occurs first, and (ii) if the Closing does not occur on 
       April 1, 1998 for any reason attributable to Lessee, Lessee shall have 
       an additional fifteen- (15-) day period during which Lessee shall 
       exert best efforts to close the purchase of the Property.  If the 
       Closing does not occur within such fifteen- (15-) day period for any 
       reason attributable to Lessee, the Option to Purchase shall terminate, 
       Lessor shall not have any obligation to convey the Property to Lessee 
       and Lessor shall have all remedies available to Lessor under Section 6.9 
       of the Lease.  If the delay in Closing is attributable to Lessor or to 
       a third party not in relationship with Lessee, then the fifteen- (15-) 
       day period shall be extended, on the same terms until a Closing can be 
       accomplished and Lessee shall have all remedies available to it under 
       this Lease."

   1.5 Closing Costs and Title Insurance.  The following is added after the 
last sentence of Section 6.4.3 of the Lease and is hereby made a part 
of Section 6.4.3:

          "If available from Escrow Agent and if requested by Lessor, Escrow 
       Agent shall issue to Lessor at its expense a 'simultaneous issue' 
       seller's policy of title insurance."

   1.6 Conveyance.  The following shall be added after the last sentence of 
Section 6.4.4 of the Lease and is hereby made a part of Section 6.4.4:

          "At Lessee's request, Lessor shall convey title to the Property to 
       an institutional lender or trustee providing synthetic lease financing 
       or other institutional financing to Lessee in connection with its 
       acquisition of the Property; provided, however, use of such designee 
       will not affect (or operate as a release of) Lessee's obligations or 
       liability under the Lease, including the Option to Purchase provisions 
       of the Lease."

    1.7 Lease Termination.  The following is added as a new Section 6.4.7 to the
Lease:

          "6.4.7  Termination of Lease.  This Lease shall automatically 
        terminate effective upon the Closing of the sale of the Property from 
        Lessor to Lessee pursuant to this Section 6; provided, however, the 
        Survival Provisions of Section 50 shall apply in connection with any 
        such termination.  If requested by Lessee, Lessor shall enter into a 
        lease termination agreement with Lessee to evidence the agreement of 
        the parties in this Section 6.4.7, and Lessee shall have the right to 
        record such lease termination agreement in the records of Washington 
        County, Oregon at any time following the recording of the statutory 
        special warranty deed referenced in Section 6.4.4."

    1.8 Committee Approval.  The following is added as new Section 6.4.8 to the 
Lease:

          "6.4.8  Committee Approval.  Lessor shall not have any obligation 
        to close the purchase and sale of the Property unless, as of the 
        Closing Date, Lessor has obtained approval of the Investment Committee 
        of Petula Associates, Ltd. to such purchase and sale, provided, 
        however, that if Lessor is unable to obtain such Committee approval, 
        (i) such failure to obtain approval shall not affect Lessee's right to 
        purchase the land and improvements covered by the Second Lease and 
        Third Lease pursuant to the terms thereof; (ii) Lessee shall not be 
        responsible for the costs described in Section 6.8.2 and (iii) Lessee 
        shall continue to lease the property pursuant to the terms of the 
        Lease.  If Lessee closes the purchase of the land and improvements 
        covered by the Second Lease and Third Lease but not the Property 
        covered by this Lease, the parties shall enter into (i) a skybridge 
        easement agreement with respect to the bridge connecting the 
        improvements covered by the Third Lease and this Lease in form mutually 
        agreeable to the parties and (ii) an easement agreement with respect 
        to a trench across the Property covered by this Lease in form mutually 
        agreeable to the parties."

   1.9  The following is added at the end of Section 6.8.1.2 of the Lease and 
is made a part of such Section:

           "No rescission notice given by Lessee to Lessor pursuant to this 
        Section 6.8.1.2 will be valid unless Lessee simultaneously gives to 
        Lessor a rescission notice to rescind its exercise of the Option to 
        Purchase under the Second Lease and the Third Lease."

   1.10 The last sentence of Section 6.9 of the Lease is hereby deleted and the
following is inserted in its place:

           "In such event, Lessor shall accept the payment of costs under 
        Section 6.8.2 above as liquidated damages and as its sole remedy for 
        such a failure of Lessee to Close, and Lessor shall continue to lease 
        to Lessee and Lessee shall continue to lease from Lessor the Premises 
        for the term, at the rental, and upon all of the terms and conditions 
        set forth in this Lease, except that the Option to Purchase in 
        Section 6 shall terminate and Lessor shall not have any obligation to 
        convey the Property to Lessee."

   1.11 Skybridge.  The following is added at the end of the second sentence of
Section 47.3.4 of the Lease and is made a part of such sentence:

           "provided, if Lessee purchases the Property and the Third Building
        simultaneously, the Skybridge shall be included in the sale of the 
        Property."

   1.12 Traffic Signal.  The following is added as a new Section 51 to the 
Lease:

           "51  Traffic Signal.  Lessor and Lessee agree that the cost to 
        install a traffic signal (the "Signal") at the intersection of Koll 
        Parkway, Walker Road and SW 150th Avenue shall be treated as a Special 
        Common Area Assessment pursuant to the Declaration of Covenants, 
        Conditions and Restrictions dated March 12, 1986, as amended by First 
        Amendment thereto dated October 28, 1996 and Section Amendment thereto 
        dated March 13, 1998 (collectively, the "Declaration"), which 
        Declaration encumbers the Property and other property.  Once the 
        Signal has been installed and is operational (the "Signal Completion 
        Date"), Lessor shall furnish to Lessee a statement in commercially 
        reasonable detail showing the portion of the cost to install such 
        Signal (the "Signal Cost") that is allocated to the Property as a 
        Special Common Area Assessment pursuant to the Declaration and, upon 
        request from Lessee, shall furnish copies of invoices received and 
        paid by Lessor in connection with the installation of the Signal.  
        Lessee agrees to reimburse Lessor for the portion of the Signal Cost 
        allocated to the Property, provided, however, that, except as 
        provided herein, Lessee shall not be required to pay such cost in a 
        lump sum, but rather such cost, together with a financing charge of 
        ten percent (10%) per annum, shall be amortized over an estimated useful
        life of ten (10) years and Lessee shall reimburse Lessor for such cost 
        by paying Lessor in equal monthly installments beginning on the first 
        day of the second calendar month following the Signal Completion Date 
        (or on the first day of the next calendar month if the Signal Completion
        Date is the first day of a calendar month) and on the first day of each
        month thereafter during the remaining term of this Lease that portion of
        such cost attributable to the month preceding such payment based on 
        such amortization plan.  If the Signal Completion Date is a day other 
        than the first day of a calendar month, then on the first day of the 
        calendar month following the Signal Completion Date, Lessee shall pay 
        to Lessor interest at the rate provided herein from the Signal 
        Completion Date through the last day of the month in which the Signal 
        Completion Date occurs.  In the alternative, Lessee shall have the right
        to prepay all or any portion of the outstanding balance of such cost at
        any time without any prepayment charge.  If Lessee purchases the 
        Property pursuant to the Option to Purchase in this Lease and the 
        Signal has been installed and is operational, upon the closing of 
        such purchase Lessee shall pay to Lessor the outstanding balance of 
        the Signal Cost allocated to the Property.  If Lessee does not 
        purchase the Property pursuant to the Option to Purchase in this Lease
        and this Lease expires or otherwise terminates, the (i) Lessee shall 
        pay to Lessor within ten (10) days of such expiration or termination 
        that portion of the Signal Cost allocated to the Property that is 
        attributable to the period commencing with the first day of the month 
        in which this Lease expires or otherwise terminates, and (ii) Lessee's
        obligation to reimburse Lessor for the remaining balance of the Signal
        Cost allocated to the Property shall cease upon such expiration or 
        termination of this Lease, provided, however, that if this Lease 
        terminates due to the default of Lessee, Lessor may recover from Lessee
        the unpaid portion of the Signal Cost allocated to the Property, if 
        any, in addition to other amounts allowed under Section 20.2 of this 
        Lease.  Nothing herein shall be deemed an agreement by Lessee that the 
        cost of any other traffic signal(s) installed near the Property in the 
        future should be passed through to Lessee under this Lease."

2.  STATUS OF LEASE.  Except as expressly amended hereby, the Lease remains in 
full force and effect and is hereby ratified and affirmed.

3.  COUNTERPARTS.  This Amendment may be executed simultaneously or in 
counterparts, each of which shall be deemed an original, but all of which 
together shall constitute one and the same Amendment.

4.  FACSIMILE TRANSMISSION.  Facsimile transmission of any signed original 
document, and retransmission of any signed facsimile transmission, shall 
be the same as delivery of an original.  At the request of either party, 
the parties shall confirm facsimile transmitted signatures by signing an 
original document.

    IN WITNESS WHEREOF, this Eighth Amendment to Lease has been executed as of 
the date set forth above.

           LESSOR:  PETULA ASSOCIATES, LTD., an Iowa corporation

                          By:       /s/ MICHAEL S. DUFFY
                          Name:     MICHAEL S. DUFFY
                          Title:    VICE PRESIDENT

                          By:       /s/ GREGORY C. HAUSER
                          Name:     GREGORY C. HAUSER
                          Title:    VICE PRESIDENT


                    EQUITY FC, LTD., an Iowa corporation

                          By:       /s/ L.S. VALENTINO
                          Name:     L.S. VALENTINO
                          Title:    COUNSEL

                          By:       /s/ RONALD B. FRANKLIN
                          Name:     RONALD B. FRANKLIN
                          Title:    VICE PRESIDENT


           LESSEE:  SEQUENT COMPUTER SYSTEMS, INC., an Oregon corporation

                          By:       /s/ ROBERT B. WITT
                          Name:     ROBERT B. WITT
                          Title:    VICE PRESIDENT & CIO