This is a translation into English.

                    LEASE for non-residential premises.

The undersigned have on this day agreed to the following lease terms:


LESSOR                        Tranboclarne 11 KB

LESSEE                        Industri-Matematik AB
                              Organization No. 556102-7680

ADDRESS OF
PREMISES                      Municipality: Stockholm
                              Street address: Stadsgarden 10
                              Block: Tranbodarne 11
                              Floor: 6-11

SIZE AND EXTENT
OF PREMISES                   Office space 9,835 square meters


FURNISHING                    The premises are let without special fittings
                              and fixtures intended for the Lessee's
                              business.

                              On expiry of this Lease and any previous
                              agreement concluded between the Lessee and the
                              Lessor regarding these premises, the Lessee
                              shall, unless otherwise agreed, remove all
                              furnishing belonging to him, and restore the
                              premises to an acceptable condition.

TERM OF LEASE                 From and including 1999-08-01 To and including
                              2004-07-31

NOTICE OF TERMINATION
PROLONGATION                  Notice of termination of this Lease shall be
                              given in writing at least 12 months prior to
                              the expiration date agreed upon.

RENT                          SEK 21,327,500 per year constituting
                              rent exclusive of surcharges marked below

Index Clause                  The rent specified above shall be adjusted in
                              accordance with the index clause appended.

Heating and hot water         Heating shall be arranged as necessary by
                              the Lessor

                              Hot water shall be provided   throughout the year

Electricity                   The Lessee is responsible for his own
                              subscription.

Cleaning of Stairway          Included in the rent

Refuse and Waste Removal      To be arranged and paid for by the Lessee (the
                              Lessor shall, however, provide waste
                              receptacles and requisite space for the
                              collection of refuse and waste.)

Snow clearance and Sanding    Included in the rent.

Property Tax                  Compensation to be paid under a separate
                              agreement.

Unforseen Costs               The following applies to Leases covering more
                              than three years.  If, after this Lease has
                              been signed, the property is affected by
                              unforseen costs increases as a result of

                              a) the introduction of, or an increase in,
                              special taxes, fees or surcharges applicable to
                              the property through a decision of Parliament,
                              the Government, the municipal authority or
                              other authority
                              b) general conversion work or other measures
                              affecting the property and not only the
                              premises in question and which the Lessor is
                              obliged to carry out following a decision of
                              Parliament, the Government, the municipal
                              authority or other authority.
                              the Lessee shall compensate the Lessor in an
                              amount corresponding to the premises' share of
                              the annual cost increase affecting the property
                              starting at the time of the cost increase in
                              question.

                              The premises' share is 52.1 per cent.

                              Reference to tax in a) above does not include
                              VAT nor does it include property tax if
                              compensation for this tax is paid under
                              separate agreement stipulated above.

                              Compensation is paid in accordance with the
                              rules for payment or rent.

VALUE ADDED TAX (VAT)         The property-owner/Lessor is liable to VAT for
                              letting the premises.  In addition to the rent
                              the Lessee shall on each due date pay the VAT
                              at the rate then applicable.

                              The VAT is to be paid at the same time as the
                              rent and calculated on the rental amount and on
                              any surcharges, and compensation specified in
                              the Lease according to the rules for VAT
                              payment on rent then applicable.

PAYMENT OF RENT               Rent shall be paid in advance, without prior
                              reminder, no later than the last weekday before
                              the beginning of each         calendar quarter

INTEREST REMINDERS            In the case of late rental payment the Lessee
                              shall pay the interest due under The Interest
                              Act, as well as compensation for written
                              reminders as set out in The Act concerning
                              Remuneration for Debt Recovery Costs etc.
                              Compensation for reminders shall be paid in the
                              amount then applicable under The Ordinance
                              concerning Remuneration for Debt Recovery Costs
                              etc.

MAINTENANCE ETC.              The Lessee shall carry out at his expense any
                              necessary maintenance of interior floor, wall
                              and ceiling surfaces and of the fittings and
                              fixtures provided by the Lessor.

                              The Lessee shall not be entitled to a reduction
                              in rent for any obstruction to his use and
                              enjoinment of the premises for the period
                              during which the Lessor carries out customary
                              forms of maintenance on the property or the
                              premises hereby rented.  The Lessor shall,
                              however, notify the Lessee in good time about
                              the type and extent of the work as well as of
                              the period during which such work is to be
                              carried out.

                              When the Lease is for a shop or handicraft
                              business that is dependent on a flow of
                              customers, this clause shall apply only if a
                              separate agreement to that effect has been
                              concluded.

                              It shall be the responsibility of the Lessee at
                              his own risk and at his own expense, to take
                              any measures as may be required by an insurance
                              company, a municipal building committee, a
                              municipal environmental protection and public
                              health committee, a fire-fighting authority or
                              any other authority for the premises to be used
                              as intended.  The Lessee shall consult with the
                              Lessor before such measures are taken.

                              If the Lessee makes any changes to the premises
                              without required building permit, as a
                              consequence of which the Lessor must pay a
                              building fee or supplementary charge under the
                              provisions of the Planning and Building Act,
                              the Lessee shall pay the Lessor a corresponding
                              amount in compensation.

SIGNS, AWNINGS, WINDOWS,
DOORS ETC.                    The Lessee shall be entitled, having consulted
                              the Lessor, to put up signs customary for the
                              business in question provided he has obtained
                              any permits as may be required by the
                              appropriate authorities and the Lessor has no
                              reasonable grounds for refusal.  Upon vacating
                              the premises, the Lessee shall undertake to
                              restore the facade of the building to an
                              acceptable condition.

                              Should more extensive maintenance of the
                              property be required, e.g. renovation of the
                              facade, the Lessee shall at his own expenses
                              and without compensation take down and replace
                              signs, awnings and aerials.

                              The Lessor undertakes not to put up automatic
                              dispensers or display cases on the exterior
                              walls of the premises rented by the Lessee
                              without the permission of the Lessee and hereby
                              grants the Lessee the option of himself
                              installing automatic dispensers and display
                              cases on such walls.

                              The Lessee shall be responsible for any damage
                              due to negligence or malicious intent to
                              display windows, entrance doors and signs.

LOCKS AND THEFT-
PREVENTION DEVICES            The Lessee shall fit the premises with such
                              locks and theft-prevention devices as may be
                              required to ensure the validity of the Lessee's
                              business insurance.

FORCE MAJEURE                 Circumstances beyond the control of the Lessor
                              and which the Lessor could not be expected to
                              foresee, such as war, riot, strike, blockade,
                              fire, explosion or action by a public
                              authority, shall release the Lessor from his
                              obligations under this Lease, provided such
                              obligations cannot be met at all or only at
                              abnormally high cost, and from liability to pay
                              compensation.

SIGNATURE                     This Lease, which may not be registered without
                              special permission, has been drawn up in two
                              identical copies, of which the parties have
                              each taken one copy. Previous agreements
                              between the parties relating to the premises
                              shall lapse as of the date on which this Lease
                              takes effect.

                              Place, date            Place, date

                              /s/                    /s/
                              Lessor                 Lessee