THIS INDENTURE made this 9th day of May, 2000.

BETWEEN:

                        KANATA RESEARCH PARK CORPORATION

                       (Hereinafter called the "Landlord")

                                                               OF THE FIRST PART

AND:

                                 PMC-SIERRA LTD.

                        (Hereinafter called the "Tenant")

                                                              OF THE SECOND PART

             WITNESSETH  that  in   consideration   of  the  rents,   covenants,
conditions and agreements herein contained, the Landlord and the Tenant covenant
and agree as follows:

1.00         LEASED PREMISES

             The  Landlord  hereby  leases  to the  Tenant  all  those  premises
             consisting of approximately  Fifty Eight Thousand Two Hundred Forty
             Two point Sixty (58,242.60) usable [Sixty Five Thousand Two Hundred
             Thirty One point Seventy One (65,231.71)  rentable]  square feet of
             space on the 2nd,  3rd and 4th  floors  (herein  called  the "First
             Leased Premises") and Nineteen Thousand Four Hundred Fourteen point
             Twenty  (19,414.20) usable [Twenty One Thousand Seven Hundred Forty
             Three point Ninety  (21,743.90)  rentable]  square feet of space on
             the 5th floor (herein called the "Additional Leased Premises") of a
             building to be known municipally as 411 Legget Drive (herein called
             the  "Building")  in the City of  Kanata  which  Building  is to be
             erected on lands owned by the Landlord  (herein called the "Lands")
             described in Schedule "A" attached.  The First Leased  Premises and
             Additional  Leased Premises are more  particularly  outlined on the
             floor  plan   attached  and  marked   Schedule   "B".  The  parties
             acknowledge that the foregoing calculation of the area of the First
             Leased Premises and Additional  Leased Premises have been estimated
             only and that the actual areas shall be subject to certification by
             the Landlord.

             Unless  otherwise  specified  herein,  all references to the Leased
             Premises in the Lease shall  include the First Leased  Premises and
             the Additional Leased Premises.

             On or before the date so  stipulated  for  possession of the Leased
             Premises,  or within a  reasonable  time  thereafter,  the Landlord
             shall provide a letter of certificate of measurement  verifying the
             square footage of the Leased Premises.

1.01         ADDITIONAL DEFINITIONS

             For the  purposes  of this Lease and any  additions  or  amendments
             thereto:

             (a)    "Improvements"  means all improvements located on the Lands,
                    including  the  Building,   the  parking  lot  or  structure
                    servicing  the  Building and other  facilities  and physical
                    structures  which are for the  exclusive use of occupants of
                    the Building;

             (b)    "Common Areas" means at any time those portions of the Lands
                    and Building not leased or  designated  for lease to tenants
                    but  provided to be used in common by (or by the  sublesses,
                    agents, employees,  customers or licensees of) the Landlord,
                    Tenant  and other  tenants of the  Building,  whether or not
                    they  are open to  general  public  and  shall  include  any
                    fixtures,  chattels,  systems,  decor, signs,  facilities or
                    landscaping  contained in those areas or  maintained or used
                    in connection  with them, and shall be deemed to include the
                    city  sidewalks  adjacent  to the Lands  and any  pedestrian
                    walkway  system  (either  above or below  ground),  park, or
                    other  public  facility in respect of which the  Landlord is
                    from time to time  subject to  obligations  arising from the
                    Lands and Building.

             (c)    "Tenant's Proportionate Share" means percent Forty Six point
                    Eighty Seven  (46.87%)  provided the said  percentage may be
                    varied  based on the actual  area of the Leased  Premises as
                    certified by the Landlord.

2.00         TERM

             The term of the Lease shall be for a period of Ten (10) years to be
             computed,  from the earlier of substantial  completion of the First
             Leased  Premises or January 1, 2001 (the  "Commencement  Date") and
             from thenceforth next ensuing and full to be completed and ended at
             the conclusion of the 10th year (the "Term").  Notwithstanding  the
             Commencement  Date of the Term,  the  Tenant  shall not  occupy the
             Additional  Leased Premises until November 1, 2000, nor shall it be
             liable for Annual Rent or Additional  Rent thereon until such date.
             The Tenant acknowledges and agrees that the Landlord shall have the
             right  to lease  the  Additional  Leased  Premises,  wholly  on the
             Landlord's behalf, to a Third Party for any term which shall expire
             on or before October 31, 2001.

2.01         INABILITY TO GIVE OCCUPANCY

             It is hereby  agreed  that if the  Landlord  is  unable to  deliver
             vacant  possession of the First Leased Premises on the Commencement
             Date and/or vacant  possession of the Additional Leased Premises on
             November 1, 2001, by reason of the Leased  Premises or the Building
             being  uncompleted or by reason of any previous  tenant or occupant
             overholding  (but  not  by  reason  of  circumstances   beyond  the
             Landlord's  control  or by reason of the  failure  of the Tenant to
             complete Tenant's Work herein or by reason of the Tenant failing on
             or  before  the  date   occurring   six  (6)  weeks  prior  to  the
             commencement  of the Term herein to supply all necessary  approvals
             and specifications which the Landlord requires in order to complete
             the Leasehold  Improvements  herein,) the Landlord shall diligently
             exercise  all  of  its  rights  to  obtain  completion  and  vacant
             possession  of the Leased  Premises and the rent payable  hereunder
             shall abate at a rental per day equal to 1/365th of the Annual Rent
             payable until such completion or vacant  possession is obtained but
             the  Landlord  shall not be liable to the Tenant for damages of any
             nature  whatsoever  and this Lease shall continue in full force and
             effect subject only to the abatement of rent as aforesaid.

2.02         EARLY OCCUPANCY

             If the  Tenant  occupies  the First  Leased  Premises  prior to the
             Commencement  Date,  then during the period up to the  Commencement
             Date the Tenant  shall be a tenant of the  Landlord  subject to all
             the covenants,  conditions and agreements set out in this Lease and
             at a  rental  per day  equal  to  1/365th  of the  Annual  Rent and
             Additional  Rent and such  rental  shall be paid on or  before  the
             commencement of the Term.

2.03         OVERHOLDING

             If the Tenant shall  continue to occupy the Leased  Premises  after
             the  expiration  of this Lease with or without  the  consent of the
             Landlord  and  without any further  written  agreement,  the Tenant
             shall  be a  monthly  tenant  at a rent  equivalent  to 150% of the
             Monthly Rent and Additional Rent hereby reserved and subject to all
             the  terms and  conditions  herein  set out  except as to length of
             tenancy.




3.00         RENT - Basic Rent

             In each year during the Term of this Lease the Tenant covenants and
             agrees to pay without any set-off or deduction  whatsoever,  to the
             Landlord,   as  rent  for  the   Leased   Premises,   and  for  the
             non-exclusive  use of the common areas of the Building on which the
             Leased Premises is located (which common area  allocation  shall be
             12% of the area of the Leased Premises), the following:


             First Leased Premises:

                      Rental Rate
                     Per Sq. Foot   For Leased       For Common       Total Per
               Year   Per Annum      Premises           Area            Annum
               ----   ---------      --------           ----            -----
               1-5      $16.50      $  961,002.90    $115,320.31   $1,076,323.21
               6-10     $20.00      $1,164,852.00    $139,782.20   $1,304,634.20




             Additional Leased Premises:


                       Rental Rate
                      Per Sq. Foot  For Leased       For Common       Total Per
               Year    Per Annum     Premises           Area            Annum
               ----    ---------     --------           ----            -----
               1-5      $16.50      $320,334.30      $38,440.05      $358,774.35
               6-10     $20.00      $388,284.00      $46,594.00      $434,878.00


             herein  called  "Annual  Rent".  The Annual  Rent will be  adjusted
             proportionately  for any  lease  year  which is other  than  twelve
             months.

3.01         MONTHLY RENTAL

             The Annual  Rent shall be  payable  in equal  monthly  installments
             (hereinafter called the "Monthly Rent") in advance on the first day
             of each calendar  month during the Term.  If the Term  commences on
             any day other  than the first  (1st) or ends on any day other  than
             the last of a calendar  month,  rent for the fraction of a month at
             the  commencement and at the end of the Term shall be prorated at a
             rate per day equal to  1/365th  of the  Annual  Rent  payable.  The
             Annual Rent and the Monthly  Rent may be varied based on the actual
             area of the Leased Premises as certified by the Landlord.

3.02         ADDITIONAL RENT

             The Tenant  covenants to pay as additional rent all sums to be paid
             to  the  Landlord   hereunder   including,   without  limiting  the
             generality  of the  foregoing,  all tax on the  Tenant's  leasehold
             improvements, Goods and Services Tax and the Tenant's Proportionate
             Share  of  the  Tax,  Capital  Tax,  Landlord's  Business  Tax  and
             Operating Costs (herein called "Additional Rent").

3.03         ESTIMATED ADDITIONAL RENTALS

             During the Term,  the Tenant shall pay to the  Landlord  monthly in
             advance  on the 1st day of each and every  month  during  the Term,
             one-twelfth  (1/12) of the amount of such annual Additional Rent as
             reasonably  estimated  by the  Landlord  to be due from the Tenant.
             Such estimates may be adjusted from time to time and re-adjusted by
             the  Landlord  and the  Tenant  shall pay to the  Landlord  monthly
             installments of Additional Rent according to such estimates,  as so
             adjusted.

3.04         DEFICIENCY OF ADDITIONAL RENT

             If the aggregate amount of such estimated  Additional Rent payments
             made by the Tenant in any year  should be less than the  Additional
             Rent due for such year,  then the Tenant  shall pay to the Landlord
             as  Additional  Rent  within  ten (10)  days of  receipt  of notice
             thereof from the Landlord the amount of such deficiency.

3.05         EXCESS OF ADDITIONAL RENTAL INSTALLMENTS

             If the aggregate  amount of such  Additional  Rent payments made by
             the  Tenant  in any year of the Term  should  be  greater  than the
             Additional  Rent due for such year,  then  should the Tenant not be
             otherwise in default  hereunder,  the amount of such excess will be
             applied by the Landlord to the next succeeding installments of such
             Additional Rent due hereunder;  and if there be any such excess for
             the last year of the Term,  the amount  thereof will be refunded by
             the  Landlord  to the  Tenant  within  thirty  (30) days  after the
             completion of the Landlord's year-end review provided the Tenant is
             not otherwise in default under the terms of the Lease.

3.06         PRO-RATING OF ADDITIONAL RENT

             If only part of any calendar  year is included  within the Term the
             amount  of the  Additional  Rent  payable  by the  Tenant  for such
             partial  year  shall  be  prorated  and  shall  be  based  upon the
             estimates  made by the Landlord and upon a final  determination  of
             such  Additional   Rent,  the  amount   remaining   unpaid  at  the
             termination of this Lease shall,  notwithstanding such termination,
             be adjusted and paid within a reasonable time thereafter.

3.07         PREPAYMENT OF ADDITIONAL RENT

             Notwithstanding  the foregoing,  if the Landlord is required to pay
             any amount, which it is entitled to collect from the tenants of the
             Building, more frequently than provided for in this Lease or if the
             Landlord is required to prepay any such  amount,  the Tenant  shall
             pay to the  Landlord  its  portion  of such  amount  calculated  in
             accordance with this Lease, forthwith upon demand.

3.08         DISPUTE AS TO AMOUNT OF ADDITIONAL RENT

             In the event of any  dispute  by the Tenant as to the amount of any
             Additional  Rent  claimed  by the  Landlord  or the  amount  of the
             Tenant's Proportionate Share thereof, the opinion of the Landlord's
             auditors  shall be conclusive  and binding as to the amount thereof
             for any period to which the opinion relates.

3.09         POST-DATED CHEQUES

             The Tenant shall,  on or before the  commencement of each and every
             Lease Year of the Term,  including the first Lease Year, deliver to
             the Landlord a series of post-dated cheques,  one for each month of
             the Lease Year,  drawn for an amount equal to the amount of Monthly
             Rent and the Additional Rent (as estimated by the Landlord) payable
             in each  month of such  Lease  Year,  provided  that the first such
             payment  is  to  include  also  any  pro-rated   Monthly  Rent  and
             Additional Rent for the period from the date of the commencement of
             the Term to the first day of the first full  calendar  month in the
             Term,  provided further that the obligation in the first Lease Year
             shall be  adjusted to take into  account  all  advance  rental paid
             hereunder.


3.10         ADVANCE RENTAL

             The Landlord hereby acknowledges receipt from the Tenant of the sum
             of One Hundred Eighty Seven Thousand Five Hundred Fifty Dollars and
             Ninety  One Cents  ($187,550.91)  inclusive  of  G.S.T.  to be held
             without  interest  and applied  against the first and last  months'
             Monthly Rent and Additional Rent.

3.11         MANNER AND PLACE OF PAYMENT OF RENT

             All rent shall,  until further  written notice is received from the
             Landlord,  be paid by the Tenant without any prior demand  therefor
             to Kanata Research Park  Corporation,  at par in the City of Kanata
             at the principal office of, Kanata Research Park  Corporation,  555
             Legget Drive,  Suite 206,  Kanata,  Ontario,  Canada K2K 2X3, or at
             such other place in Canada as Kanata Research Park  Corporation may
             designate  in  writing  from time to time and shall be  payable  in
             lawful money of Canada.  The Landlord  agrees that payments made to
             Kanata  Research Park  Corporation  pursuant to this Lease shall be
             deemed to be payments made to the Landlord and the Tenant shall not
             be required to see to the application thereof.

3.12         DEFAULT

             Any sums  received by the  Landlord  from or for the account of the
             Tenant  when the Tenant is in default  hereunder  may be applied at
             the Landlord's option to the satisfaction, in whole or part, of any
             of the  obligations of the Tenant then due hereunder in such manner
             as the Landlord  sees fit, and  regardless  of any  designation  or
             instructions of the Tenant to the contrary.

3.13         ACCRUAL OF RENT

             Rent shall be  considered  as annual and accruing  from day to day,
             and where it becomes  necessary  for any reason to  calculate  such
             rent  for an  irregular  period  of  less  than  one  (1)  year  an
             appropriate  apportionment  and adjustment shall be made. Where the
             calculation  of any  Additional  Rent is not made  until  after the
             termination of this Lease, the obligation of the Tenant to pay such
             Additional  Rent shall  survive the  termination  of this Lease and
             such  amounts  shall be payable by the  Tenant  upon  demand by the
             Landlord.

3.14         NET LEASE

             The Tenant  acknowledges  and agrees that it is intended  that this
             Lease shall be a completely carefree net lease for the Landlord and
             that the Landlord shall not be responsible  during the Term for any
             costs,  charges,  expenses  or  outlays  of any  nature  whatsoever
             arising from or relating to the Leased  Premises,  whether foreseen
             or unforeseen  and whether or not within the  contemplation  of the
             parties  at the  commencement  of  the  Term  except  as  shall  be
             otherwise  expressly  provided  for in this  Lease and  other  than
             Income Tax due by the Landlord, the Tenant shall be responsible for
             any business transfer tax, value added tax,  multi-stage sales tax,
             goods and  services  tax or any other tax or levy on rental  income
             that may be charged,  levied or assessed by any government or other
             applicable taxing authority against the Landlord whether known as a
             goods and  services  tax or any other  name  ("Goods  and  Services
             Tax").

4.00         TENANT'S BUSINESS TAX

             In each and every year during the Term the Tenant  covenants to pay
             and discharge prior to the same becoming due and payable all taxes,
             rates, duties and assessments and other charges that may be levied,
             rated, charged or assessed against or in respect of the Tenant's or
             other  occupant's  use and  occupancy of the Leased  Premises or in
             respect of the Tenant's or other occupant's leasehold improvements,
             equipment,  machinery,  trade  fixtures and  facilities  situate or
             installed  on or in the Leased  Premises  and every tax and licence
             fee in respect of any and every  business  carried on in the Leased
             Premises  or in  respect  of the use or  occupancy  thereof  by the
             Tenant (and any and every subtenant,  licensee or occupant thereof)
             whether such taxes, rates, duties, assessments and licence fees are
             charged  by any  municipal,  parliamentary,  school  or other  body
             during the term hereby demised.  The Tenant will indemnify and keep
             indemnified  the  Landlord  from and  against  payment of all loss,
             costs,  charges and expenses occasioned by, or arising from any and
             all such taxes, rates, duties,  assessments,  licence fees, and any
             and all taxes  which may in future be levied or  charged in lieu of
             such taxes; and any such loss, costs, charges and expenses suffered
             by the  Landlord  may be collected by the Landlord as rent with all
             rights of distress  and  otherwise  as reserved to the  Landlord in
             respect of rent in arrears. The Tenant further covenants and agrees
             that upon written request of the Landlord, the Tenant will promptly
             deliver to the Landlord for inspection  receipts for payment of all
             such taxes,  rates,  duties,  assessments,  licence  fees and other
             charges in respect of all improvements, equipment and facilities of
             the  Tenant  on or in the  Leased  Premises  or in  respect  of any
             business  carried  on in the  Leased  Premises  which  were due and
             payable up to one (1) month prior to such request.

4.01         LANDLORD'S BUSINESS TAX

             In the event that there are any taxes, rates,  duties,  assessments
             or charges levied,  rated, charged or assessed against the Landlord
             by any municipal or other  governmental  authority  with respect to
             the  Landlord's use or occupancy of any part of the Building or the
             Land  which the  Tenant is  entitled  to use in common  with  other
             persons or with respect to any other part of the Building which the
             Landlord uses or occupies for the purpose of supplying  services to
             the Leased  Premises  (such taxes,  rates,  duties,  assessments or
             charges hereinafter called the "Landlord's  Business Tax"), then it
             is  agreed  that in  addition  to all  other  sums,  the  Tenant is
             required to pay pursuant to this Lease, the Tenant shall pay to the
             Landlord as Additional  Rent, the Tenant's  Proportionate  Share of
             such Landlord's Business Tax.

4.02         TAX ON TENANT'S LEASEHOLD IMPROVEMENTS

             The Tenant shall pay to the Landlord as Additional Rent, in respect
             of each applicable tax year, an amount equal to that portion of the
             Tax for such tax year, as  determined  by the  Landlord,  which may
             reasonably  be  regarded  as being  attributable  to the  fixtures,
             improvements,  installations,  alterations, additions and equipment
             from time to time made, erected or installed by or on behalf of the
             Tenant in the Leased Premises.

4.03         PROPERTY TAX

             "Tax" in this Lease means an amount equivalent to all taxes, rates,
             duties, levies and assessments whatsoever levied, rated, charged or
             assessed by any municipal,  parliamentary,  educational,  school or
             other governmental  authority charged upon the Building, the Lands,
             the property  and all  improvements  now or  hereafter  appurtenant
             thereto or upon the  Landlord  on  account  thereof  including  all
             taxes, rates, duties, levies and assessments for local improvements
             and  including  any tax which has been  attracted  by the  Tenant's
             leasehold  improvements  and  equipment and for which the Tenant is
             responsible  hereunder  and  excluding  any  portion of Tax payable
             solely by any other tenant and excluding any Tax charged against or
             applicable to the other office  buildings  constructed on the Lands
             and the parking spaces  (excluding  visitor parking)  applicable to
             such  buildings  and  excluding  such  taxes as  corporate  income,
             capital gains,  profits or excess profits,  taxes assessed upon the
             income of the  Landlord,  and shall also  include any and all taxes
             which  may in  future  be  levied  in lieu  of Tax as  hereinbefore
             defined.



4.04         ALLOCATION OF TAX

             If the Tax or any portion thereof that may be payable by the Tenant
             by  reason  of  this  Lease,  depends  upon  an  assessment  or  an
             approximation  of an  assessment  which  has not  been  made by the
             taxing authority or authorities having  jurisdiction,  the Landlord
             shall  determine  the  same;  any  such  determination  made by the
             Landlord  shall be  binding  upon  the  Tenant  unless  shown to be
             unreasonable or erroneous in some substantial respect. The Landlord
             shall have the right from time to time to  reasonably  allocate and
             re-allocate  Taxes not charged  separately to the various buildings
             (including  the  Building) and the parking  garages  located on the
             Lands.

4.05         SEPARATE SCHOOL TAXES

             If the Tenant or any  subtenant  or  licensee  of the Tenant or any
             occupant  of the  Leased  Premises  shall  elect to have the Leased
             Premises or any part thereof  assessed for separate  school  taxes,
             the Tenant shall pay to the Landlord,  as additional  rent, as soon
             as the amount of the  separate  school  taxes is  ascertained,  any
             amount by which the amount of  separate  school  taxes  exceeds the
             amount which would have been payable for Tax had such  election not
             been made and if the Tenant or any  subtenant  or  licensee  of the
             Tenant shall elect to have the Leased  Premises or any part thereof
             assessed  for  separate  school  taxes  as  aforesaid  and if  such
             separate school taxes are less than the taxes which would have been
             payable for school taxes had such election not been made,  then and
             in that event, the Tenant shall be entitled to deduct from the rent
             for the first  month of the year  following  which  such taxes were
             payable,  the amount by which the  separate  school taxes were less
             than the amount  which would have been  payable for school taxes in
             the year prior to such month.

4.06         TAX APPEAL

             Any expense  incurred by the Landlord in obtaining or attempting to
             obtain a reduction in the amount of the Tax or the assessment  upon
             which the Tax may be based,  shall be added to and  included in the
             amount  of  the  Tax  and  if  the  Tenant   shall  have  paid  its
             Proportionate  Share of the Tax and the Landlord  shall  thereafter
             receive a refund of any portion of the Tax, the Landlord shall make
             an appropriate refund to the Tenant.

4.07         CAPITAL TAX

             "Capital  Tax" means the tax or excise  imposed or capable of being
             imposed  upon  the  Landlord  by any  government  authority  having
             jurisdiction  which is  measured  or based in whole or in part upon
             the taxable  capital  employed by the Landlord,  which said taxable
             capital  shall be  deemed  to be the cost to the  Landlord  of said
             Building and Lands  computed as if the amount of such tax were that
             amount due if the Building and the Lands were the only  property of
             the  Landlord,  the Landlord was entitled to no capital  deduction,
             investment  allowance or any other  deduction  whatsoever.  For the
             purpose  of this  paragraph  the Term  "investment  allowance"  and
             "capital deduction" shall be defined by reference to the applicable
             taxing statute.

5.00         OPERATING COSTS

             "Operating Costs" in this Lease means the total charges,  expenses,
             costs, fees, rentals,  disbursements or outlays incurred,  accrued,
             paid, payable or attributable  whether by the Landlord or others on
             behalf of the Landlord for complete repair, maintenance, operation,
             cleaning  and  management  of  the  Building,  Lands  and  all  the
             improvements  thereon and the  components  of each of them  (herein
             collectively  called the  "Property")  such as are in keeping  with
             maintaining the standard of a first class commercial Property so as
             to give it high character and distinction;  and including,  without
             limiting the generality of the  foregoing,  the cost of all repairs
             and replacements  required for such operation and maintenance,  the
             cost of  maintaining  and repairing the heating,  air-conditioning,
             ventilating  and mechanical  systems and equipment in the Building,
             the cost of operating and maintaining any elevators, (including the
             cost of service  contracts);  the costs of  providing  hot and cold
             water; the costs of providing  electricity not otherwise chargeable
             to tenants;  the costs of all fuel,  gas and steam used in heating,
             ventilating and  air-conditioning;  the cost of energy conservation
             devices  or  equipment;   the  cost  of  snow  removal;   landscape
             maintenance  including the cost of replacing any landscaping on the
             Lands; the cost of window cleaning;  the cost of insurance premiums
             for fire,  casualty,  liability,  rental  and any  other  insurance
             coverage   maintained  by  the  Landlord  in  connection  with  the
             Property;  telephone  and other utility  costs;  the amount paid or
             payable for all  salaries,  wages and benefits  and other  payments
             paid  to  or  on  behalf  of  persons   engaged  in  the  cleaning,
             supervision,  maintenance  and  repair of the  Property  (including
             wages of the on site  Property  Manager);  the  cost of  accounting
             services  necessary to prepare the  statements and opinions for the
             tenants and to compute the rents and other  charges  payable by the
             tenants  of the  Building;  the cost of  porters,  guards and other
             protection services;  the cost of providing security services;  the
             cost of garbage or refuse  removal from the Building not  otherwise
             chargeable to tenants;  the cost of repair and  maintenance  of the
             roadways, curbs, paving, walkways, pools, landscaping, lighting and
             other  common  facilities  and  outside  areas;  cost  of  services
             provided  for the common use of the  tenants;  building  management
             fees or an administrative fee (not exceeding the going rate charged
             by trust companies or first class building Management Companies for
             building management in the Regional Municipality of Ottawa-Carleton
             for  similar  buildings);   the  cost  of  service  contracts  with
             independent  contractors and all other expenses, paid or payable by
             the Landlord in connection with the operation of the Property,  but
             such Operating  Costs shall not include any interest on any debt or
             capital; retirement of any debt; any amounts directly chargeable by
             the  Landlord to any tenant or tenants of the Building and the cost
             of any  repairs  paid for by  insurance  proceeds  or for which the
             Landlord was reimbursed by insurance proceeds.

5.01         ALLOCATION OF OPERATING COSTS

             In determining  the Operating  Costs  attributable to the Building,
             the Landlord  shall have the right from time to time to  reasonably
             allocate  and  re-allocate  such  Operating  Costs which  represent
             operating  costs incurred for facilities or services  shared by the
             Building  and such other  buildings as are owned or operated by the
             Landlord and which are not charged or allocated  separately against
             the Building  and any such other  building or  buildings.  Any such
             determination made by the Landlord shall be binding upon the Tenant
             unless shown to be  unreasonable  or erroneous in some  substantive
             respect.  The Tenant shall have the right to  reasonable  access to
             the books and records of the Landlord to conduct an examination and
             to ascertain  whether  allocations  of Operating  Costs made by the
             Landlord have been made reasonably.

5.02         FULL OCCUPANCY

             If in any year the  Building  has not been fully  occupied  for the
             whole year, the amount of the Operating  Costs for such year may be
             adjusted by the  Landlord,  acting  reasonably,  to an amount which
             reflects  what the amount of the  Operating  Costs  would be if the
             Building had been fully occupied for the whole year.

5.03         USE OF ELECTRICITY

             The Tenant's use of electricity in the Leased Premises shall be for
             the  operation of office  lighting and business  machines,  such as
             typewriters,  desktop computers and other small office machines and
             shall not at any time exceed the capacity of any of the  electrical
             conductors  and  equipment  in  or  otherwise  serving  the  Leased
             Premises. In order to ensure that such capacity is not exceeded and
             to avert possible  adverse  effect upon the  Building's  electrical
             service, the Tenant shall not, without the Landlord's prior written
             consent  in  each  instance,   connect  any  additional   fixtures,
             appliances  or  equipment  (other  than  normal  office  electrical
             fixtures,  lamps, typewriters and similar small office machines) to
             the Building's electric  distribution system or make any alteration
             or  addition  to  the  electrical  system  of the  Leased  Premises
             existing at the  commencement  of the Term. If the Landlord  grants
             such consent, the cost of all additional risers and other equipment
             required therefor shall be paid as Additional Rent by the Tenant to
             the Landlord upon demand.  As a condition to granting such consent,
             the  Landlord may require the Tenant to agree to pay an increase in
             the  Additional  Rent for  Operating  Costs by an amount which will
             reasonably  reflect  the  increased  cost  of the  Landlord  of the
             additional  electrical  services  to be  furnished  to  the  Leased
             Premises by the Landlord.

5.04         METERS

             The Tenant covenants to pay for the cost of any additional metering
             which  may be  required  by the  Landlord  to be  installed  in the
             Building for the purpose of determining  the amount of electricity,
             gas, hydro or other utilities  consumed by the Tenant in the Leased
             Premises.

6.00         ASSIGNING OR SUBLETTING

             The Tenant  covenants  that it will not assign or sublet the Leased
             Premises or any part thereof  without the prior written  consent of
             the Landlord, which consent shall not be unreasonably withheld save
             and except in the event of any of the following,  in which case the
             Landlord may arbitrarily withhold its consent:

             (a)      an  assignment  or  sublet  of the  whole  of  the  Leased
                      Premises, the terms of which have a net present value that
                      are less or more than the net  present  value of the terms
                      of the Lease (not including the value of initial leasehold
                      improvements,  leasing  commissions  or inducements of any
                      kind  under  the  Lease)  and in the  latter  event if the
                      Landlord  consents  to such  assigned or sublet the Tenant
                      shall  pay  the   increased   value  to  the  Landlord  as
                      Additional Rent.;

             (b)      a sublet of a part of the Leased Premises;

             (c)      where the  assignee or  subtenant  is then a tenant of the
                      Landlord at the Building and the Landlord has or will have
                      during the next following six (6) months, vacant space for
                      rent in the Building.

6.01         REQUEST TO ASSIGN OR SUBLET

             If the Tenant  requests the Landlord's  consent to an assignment of
             this  Lease  or to a  subletting  of the  whole  or any part of the
             Leased  Premises,  the Tenant shall submit to the Landlord the name
             and address of the proposed  assignee or subtenant  together with a
             copy of an offer or  agreement  to assign or sublet or the sublease
             or assignment and such  additional  information as to the nature of
             its  business  and  its  financial   responsibility   and  standing
             (including  financial  statements)  as the Landlord may  reasonably
             require ("required information").

6.02         LANDLORD'S RIGHT TO CANCEL

             Upon receipt of such request and the required  information from the
             Tenant,  the Landlord shall have the right,  exercisable in writing
             within thirty (30) days after such receipt, to cancel and terminate
             this Lease if the  request is to assign this Lease or to sublet all
             of the Leased  Premises,  or, if the request is to sublet a portion
             of the Leased  Premises  only, to cancel and  terminate  this Lease
             with respect to such portion, in each case as of the date set forth
             in the Landlord's notice of exercise of right  ("Landlord's  notice
             of termination"),  which shall be neither less than sixty (60) days
             nor more than one  hundred  and  twenty  (120) days  following  the
             delivery of the Landlord's  notice of termination.  If the Landlord
             shall exercise such right, the Tenant shall surrender possession of
             the entire  Leased  Premises or the portion which is the subject of
             the  right,  as the  case  may be,  on the  date  set  forth in the
             Landlord's  notice of termination in accordance with the provisions
             of this Lease  relating to the surrender of the Leased  Premises at
             the  expiration of the Term. If this Lease shall be cancelled as to
             a portion  of the Leased  Premises  only,  the rent  payable by the
             Tenant  under this Lease  shall be abated  proportionately.  In the
             event that the Landlord shall not exercise the right to cancel this
             Lease, then the Landlord's consent to any such request to assign or
             sublet shall not be unreasonably withheld.

6.03         ASSIGNMENT AGREEMENT

             The Landlord's  consent to any  assignment may be conditional  upon
             the  assignee  entering  into an  assignment  in form  and  content
             satisfactory to the Landlord, to perform, observe and keep each and
             every  covenant,  condition and agreement in this Lease on the part
             of the Tenant to be  performed,  observed  and kept  including  the
             payment of rent and all other sums and  payments  agreed to be paid
             or payable under this Lease on the days and times and in the manner
             specified.

6.04         CONSENT NOT TO RELEASE TENANT

             In no event  shall  any  assignment  or  subletting  to  which  the
             Landlord may have consented  release or relieve the Tenant from his
             obligations   fully  to  perform  all  the  terms,   covenants  and
             conditions of this Lease to be performed.

6.05         CHANGE IN CORPORATE CONTROL

             If the Tenant is a corporation  or if this Lease,  with the written
             consent of the Landlord,  is assigned to a  corporation,  and if at
             any time during the Term any part or all of the corporate shares or
             voting  rights  of  shareholders  shall  be  transferred  by  sale,
             assignment,  bequest, inheritance, trust, operation of law or other
             disposition,  or  treasury  shares be issued,  so as to result in a
             change in the control of such  corporation by the person or persons
             now owning a majority of the corporate shares thereof, the Landlord
             may  terminate  this Lease at any time after such change in control
             by giving the Tenant thirty (30) days prior written  notice of such
             termination. The Tenant shall, at the request of the Landlord, make
             available to the Landlord for  inspection or copying,  or both, all
             books and  records of the Tenant  which,  alone or with other data,
             show the applicability or inapplicability of this paragraph. If any
             stockholder or  shareholder of the Tenant shall,  after the request
             of the  Landlord so to do, fail or refuse to furnish  forthwith  to
             the Landlord any data verified by the affidavit of such stockholder
             or shareholder or other credible person,  which data, alone or with
             other  data  show  the  applicability  or  inapplicability  of this
             paragraph,  the  Landlord  may  terminate  this Lease by giving the
             Tenant thirty (30) days' prior written notice of such termination.

6.06         NOTICE OF CHANGE OF CONTROL

             Where there is a change in  corporate  control of the  Tenant,  the
             Tenant shall forthwith so advise the Landlord in writing.

6.07         COST OF CONSENT

             The Tenant further agrees that prior to any consent for assignment,
             subletting  or change in control  being  effective and binding upon
             the  Landlord,  the  Tenant  shall  pay on  demand  the  Landlord's
             reasonable  costs  (including  the  Landlord's  own  administrative
             costs)  incurred in connection  with the Tenant's  request for such
             consent.

7.00         TENANT'S COVENANTS

             The Tenant further covenants with the Landlord as follows:

7.01         TENANT REPAIRS

             To  repair,  maintain  and keep the Leased  Premises  and all trade
             fixtures and  improvements  therein in good and substantial  repair
             subject only to defects in construction  of the structural  members
             of the  Building,  reasonable  wear and tear  and  damage  by fire,
             lightning and tempest or other casualty  against which the Landlord
             is insured  (herein  collectively  referred  to as  "Tenant  Repair
             Exceptions");  and that the  Landlord  may enter and view  state of
             repair  and that the  Tenant  will  repair  according  to notice in
             writing,  except for Tenant Repair  Exceptions  and that the Tenant
             will leave the Leased  Premises in good  repair,  except for Tenant
             Repair Exceptions. Notwithstanding anything hereinbefore contained,
             the Landlord  may in any event make repairs to the Leased  Premises
             without  notice if such  repairs  are, in the  Landlord's  opinion,
             necessary  for  the  protection  of the  Building  and  the  Tenant
             covenants  and  agrees  with  the  Landlord  that  if the  Landlord
             exercises  any such  option to repair,  the Tenant  will pay to the
             Landlord  together  with the next  instalment of Monthly Rent which
             shall  become due after the  exercise of such option all sums which
             the  Landlord  shall have  expended in making such repairs and that
             such sums,  if not so paid within such time,  shall be  recoverable
             from the Tenant as rent in arrears.  Provided  further  that in the
             event  that the  Landlord  from time to time  makes any  repairs as
             hereinbefore  provided, the Tenant shall not be deemed to have been
             relieved  from the  obligation  to  repair  and  leave  the  Leased
             Premises in a good state of repair.

7.02         RULES AND REGULATIONS

             That the Tenant and his employees and all persons visiting or doing
             business  with  him on the  Leased  Premises  shall be bound by and
             shall  observe  rules  and  regulations  annexed  hereto  or as may
             hereafter  be  reasonably  set by the  Landlord of which  notice in
             writing  shall be given to the  Tenant and upon such  notice  being
             delivered  all such  rules  and  regulations  shall be deemed to be
             incorporated into and form part of this Lease.

7.03         USE OF PREMISES

             The Tenant shall not cause, suffer or permit the Leased Premises to
             be used for any purpose  other than office use, to include  general
             office, sales, software and product design, engineering and testing
             laboratories and related uses.

7.04         INCREASE IN INSURANCE PREMIUMS

             That it will not keep,  use,  sell or offer for sale in or upon the
             Leased  Premises  any  article  which  may  be  prohibited  by  any
             insurance  policy in force from time to time  covering the Building
             including any regulations  made by any fire insurance  underwriters
             applicable to such policies. In the event the Tenant's occupancy or
             conduct or business in, or on the Leased  Premises,  whether or not
             the Landlord has consented to the same,  results in any increase in
             premiums  for  the  insurance  carried  from  time  to  time by the
             Landlord  with  respect to the  Building,  the Tenant shall pay any
             such increase in premiums as  Additional  Rent within ten (10) days
             after bills for such  additional  premiums shall be rendered by the
             Landlord. In determining whether increased premiums are a result of
             the Tenant's use or  occupancy of the Leased  Premises,  a schedule
             issued by the  organization  computing  the  insurance  rate on the
             Building  showing the  various  components  of such rate,  shall be
             conclusive  evidence of the several items and charges which make up
             such rate.  The Tenant shall  promptly  comply with all  reasonable
             requirements  of the  insurance  authority or of any insurer now or
             hereafter in effect relating to the Leased Premises.




7.05         CANCELLATION OF INSURANCE

             If any policy of insurance upon the Building or any part thereof or
             upon the Lands or any part  thereof  shall be cancelled or rendered
             voidable  by  the  insurer  by  reason  of  any  act,  omission  or
             occupation  of the  Leased  Premises  or any  part  thereof  by the
             Tenant,  any  assignee  or  subtenant  of the  Tenant  or by anyone
             permitted  by the  Tenant to be upon the Leased  Premises,  and the
             Tenant,  after  receipt  of notice  from the  Landlord,  shall have
             failed to immediately  reinstate  such insurance  policies or avoid
             cancellation  of such insurance  policies,  the Landlord may at its
             option  determine  this Lease  forthwith by leaving upon the Leased
             Premises  notice in writing of its intention so to do and thereupon
             rent and any other  payments  for which the Tenant is liable  under
             this  Lease  shall be  apportioned  and paid in full to the date of
             such  determination  and the Tenant  shall  immediately  deliver up
             possession of the Leased  Premises to the Landlord and the Landlord
             may re-enter and take  possession of the same or the Landlord shall
             pay any increased  cost of such  insurance and the Tenant shall pay
             as Additional Rent, on demand, the amount by which the premiums for
             such insurance are so increased.

7.06         OBSERVANCE OF LAW

             To comply  promptly at its own expense with all  provisions  of law
             including without  limitation,  federal and provincial  legislative
             enactments,   building  by-laws,  and  any  other  governmental  or
             municipal regulations which relate to the partitioning,  equipment,
             operation and use of the Leased Premises,  and to the making of any
             repairs,    replacements,    alterations,    additions,    changes,
             substitutions or improvements of or to the Leased Premises.  And to
             comply with all police,  fire and sanitary  regulations  imposed by
             any federal,  provincial or municipal  authorities  or made by fire
             insurance  underwriters,  and to observe and obey all  governmental
             and  municipal  regulations  and other  requirements  governing the
             conduct of any business conducted in the Leased Premises.  Provided
             that in default of the Tenant so complying  the Landlord may at its
             option where possible comply with any such requirement and the cost
             of such compliance  shall be payable on demand by the Tenant to the
             Landlord as Additional Rent.

7.07         WASTE AND OVERLOADING OF FLOORS

             Not to do or suffer any waste or damage, disfiguration or injury to
             the Leased Premises or the fixtures and equipment thereof or permit
             or suffer any overloading of the floors  thereof;  and not to place
             therein  any safe,  heavy  business  machine or other  heavy  thing
             without first obtaining the consent in writing of the Landlord; and
             not to use or permit to be used any part of the Leased Premises for
             any  dangerous,  noxious or offensive  trade or business and not to
             cause or permit any nuisance in, at or on the Leased Premises;  and
             without the prior  consent in writing of the  Landlord,  the Tenant
             will not bring  onto or use in the  Leased  Premises  or permit any
             person  subject  to the  Tenant to bring  onto or use on the Leased
             Premises any fuel or combustible material for heating,  lighting or
             cooking  nor will it allow  onto the  Leased  Premises  any  stove,
             burner,  kettle,  apparatus or appliance for utilizing the same and
             the Tenant will not purchase,  acquire or use electrical current or
             gas  for  consumption  on the  Leased  Premises  except  from  such
             supplier  thereof  as shall  have been  approved  in writing by the
             Landlord.

7.08         INSPECTION

             To permit the  Landlord,  its  servants or agents to enter upon the
             Leased  Premises  at any time and from time to time for the purpose
             of inspection and of making repairs, alterations or improvements to
             the Leased  Premises or to the Building and the Tenant shall not be
             entitled  to  compensation  for  any  inconvenience,   nuisance  or
             discomfort occasioned thereby. The Landlord, its servants or agents
             may at any  time  and  from  time to time  enter  upon  the  Leased
             Premises to remove any article or remedy any  condition  which,  in
             the opinion of the Landlord, reasonably arrived at, would be likely
             to lead to  cancellation  of any policy of insurance and such entry
             by the  Landlord  shall not be deemed to be a re-entry.  The Tenant
             shall,  upon  written  request  of the  Landlord,  produce  audited
             Financial  Statements of the Tenant, which statements shall include
             a Balance Sheet, Income Statement,  Statement of Retained Earnings,
             Statement of Source and Application of Funds.


7.09         INDEMNITY TO LANDLORD

             To promptly  indemnify  and save  harmless the Landlord for any and
             all liabilities,  damages,  costs,  claims, suits or actions of any
             nature or kind including the full cost to the Landlord in resisting
             or  defending  the same to which the  Landlord  shall or may become
             liable or suffer arising out of or by reason of:

             (a)      any  breach,  violation  or  non-performance  by the
                      Tenant  of any  of  its  covenants  and obligations under
                      this Lease;

             (b)      any damage to property  while said property shall be in or
                      about  the  Leased   Premises   including   the   systems,
                      furnishings  and  amenities  thereof,  as a result  of the
                      negligence,  misuse  or  wilful  act  of the  Tenant,  its
                      express or implied invitees,  licensees,  agents, servants
                      or employees; and

             (c)      any injury to any  invitee,  licensee,  agent,  servant or
                      employee of the Tenant,  including  death resulting at any
                      time therefrom, occurring on or about the Leased Premises,
                      the Property or the Lands;

             and this indemnity shall survive the expiry or sooner determination
             of this Lease.

7.10         DAMAGE BY TENANT

             That if the Building including the Leased Premises,  the elevators,
             boilers,  engines,  pipes and other apparatus (or any of them) used
             for the purpose of heating,  ventilating  or  air-conditioning  the
             Building  or  operating  the  elevators,  or if  the  water  pipes,
             drainage  pipes,  electric  lighting  or  other  equipment  of  the
             Building  or the  roof or  outside  walls  or  other  parts  of the
             Building will not function  properly or become damaged or destroyed
             through the negligence, carelessness or misuse of the Tenant, or of
             any  of  its  invitees,  licensees,  agents,  servants,  employees,
             clients, customers or contractors, or through it or them in any way
             stopping   up   or   injuring   any   heating,    ventilating    or
             air-conditioning apparatus,  elevators, water pipes, drainage pipes
             or other  equipment  or parts of the  Building,  the expense of the
             necessary  repairs,  replacements or alterations  shall be borne by
             the  Tenant  and  paid  forthwith  on  demand  to the  Landlord  as
             Additional Rent.

7.11         TENANT INSURANCE

             (a)      To maintain in force during  currency of this Lease at the
                      Tenant's   expense   insurance   policies   to  cover  the
                      following:

                      (i)           comprehensive  general  liability  insurance
                                    with  limits of not less  than Five  Million
                                    Dollars  ($5,000,000.00)  (including  bodily
                                    injury and property  damage,  tenant's legal
                                    liability,  cross  liability and contractual
                                    liability)  to  cover  all  responsibilities
                                    assumed  by the Tenant  with  respect to the
                                    use or occupancy of and the business carried
                                    on,  in or  from  the  Leased  Premises,  in
                                    amounts acceptable to the Landlord;

                      (ii)          all  risk   insurance   covering   leasehold
                                    improvements  made  or  installed  by  or on
                                    behalf of the  Tenant in an amount  equal to
                                    the full replacement value thereof; and

                      (iii)         any other  insurance  that the  Landlord (or
                                    the  Landlord's   mortgagee,   if  any)  may
                                    reasonably require from time to time in form
                                    and amounts and for insurance  risks against
                                    which a prudent Tenant would protect itself;

             (b)      That all Tenant's  insurance  required  hereunder shall be
                      with  insurers and upon terms and  conditions to which the
                      Landlord  has  no  reasonable  objection.  Copies  of  all
                      policies, or certificates  evidencing the insurance or its
                      renewal   shall  be  delivered  to  the  Landlord  at  the
                      Landlord's request;

             (c)      That all  policies of insurance  to be  maintained  by the
                      Tenant shall, in the case of general liability  insurance,
                      include  the  Landlord   (and,   where   applicable,   the
                      Landlord's  mortgagee) as  additional  insured and, in the
                      case of all other insurance coverage,  contain a waiver by
                      the  insurer  and Tenant of any rights of  subrogation  or
                      indemnity  or any other claim to which the  insurer  might
                      otherwise be entitled against the Landlord (and mortgagee)
                      or the  agents  or  employees  of the  Landlord.  All such
                      insurance   policies   shall  also   contain  a  provision
                      prohibiting  the insurer from  cancelling  or altering the
                      insurance  coverage  without  first  giving  the  Landlord
                      thirty (30) days prior written notice thereof;

             (d)      That if the Tenant  fails to take out or maintain in force
                      such  insurance,  the Landlord may take out the  necessary
                      insurance  and pay the  premium  therefor  and the  Tenant
                      shall  pay to the  Landlord  the  amount  of such  premium
                      immediately on demand as Additional Rent; and

             (e)      That if both the Landlord and the Tenant have claims to be
                      indemnified under any such insurance,  the indemnity shall
                      be  applied  first to the  settlement  of the claim of the
                      Landlord and the balance, if any, to the settlement of the
                      claim of the Tenant.

7.12         NO ABATEMENT OF RENT

             That there shall be no  abatement or reduction of rent and that the
             Landlord  shall not be liable  for any damage  howsoever  caused to
             property of the Tenant or of any person subject to the Tenant which
             is in or upon or being  brought to or from the Leased  Premises  or
             the Building or for personal injury  (including death) sustained in
             any manner by the Tenant or any person  subject to the Tenant while
             the Tenant or any such person is on or upon entering or leaving the
             Leased Premises or Building unless such property damage or personal
             injury may have been  attributable  to fault or neglect on the part
             of the  Landlord  or of any person for whom the  Landlord is at law
             responsible,  and that the Tenant will  indemnify and save harmless
             the  Landlord  from and against all claims and demands made against
             the Landlord by any person for or arising out of any such  property
             damage or personal injury.

7.13         EXHIBITING PREMISES

             To permit the  Landlord or its agents or servants to enter and show
             the Leased  Premises,  during normal business hours, to prospective
             purchasers of the Building and may after notice of  termination  of
             this  Lease has been given or within the last six (6) months of the
             Term, enter and show the Leased Premises to prospective tenants and
             erect signs stating that the premises are "To Let".



7.14         SIGNS

             The Tenant  shall not paint,  display,  inscribe or place any sign,
             symbol, notice or lettering of any kind anywhere outside the Leased
             Premises or within the Leased Premises so as to be visible from the
             outside  of the  Building  or the  common  areas  thereof  with the
             exception  only of an  identification  sign at the  entrance to the
             Leased  Premises  (which  sign shall be  subject to the  Landlord's
             written approval as to size,  design and location) and the Tenant's
             name on the  directory  listing  (if any) in the main  lobby of the
             Building.


7.15         NAME OF BUILDING

             Not to refer to the Building by any name other than that designated
             from time to time by the Landlord and the Tenant shall use the name
             of the Building  for the business  address of the Tenant but for no
             other purpose.

7.16         KEEP TIDY

             The Tenant shall provide its own cleaning and janitorial  services.
             At the end of each  business day, the Tenant shall leave the Leased
             Premises in a tidy condition.

7.17         DELIVERIES

             The Tenant  shall  receive,  ship,  take  delivery of and allow and
             require  suppliers  or  others  to  deliver  or  take  delivery  of
             merchandise,  supplies, fixtures, equipment,  furnishings, wares or
             merchandise  only through the loading entrance and other facilities
             provided for that purpose and at the times set by the Landlord.

7.18         NOTICE OF DAMAGE

             To notify the  Landlord  promptly of any damage to or defect in the
             Leased  Premises or the Building or any part thereof  including any
             electrical,   plumbing,  heating,  ventilating,   air-conditioning,
             water,  sprinkler or gas systems or equipment,  or the water pipes,
             gas  pipes,  telephone  lines or  electrical  apparatus  within  or
             leading  to the  Leased  Premises,  and in  case  of  fire  to give
             immediate notice thereof to the Fire Department.

7.19         ALTERATIONS, ETC

             The Tenant will not make or erect in or to the Leased  Premises any
             installations,  alterations,  additions or  partitions or remove or
             change the  location  or style of any  installations,  alterations,
             equipment,  outlets,  piping or wiring  relating to the electrical,
             plumbing,  water,  gas,  air-conditioning,  heating or  ventilating
             systems  without  submitting  drawings  and  specifications  to the
             Landlord and obtaining the Landlord's prior written consent in each
             instance.  The Tenant  must  further  obtain the  Landlord's  prior
             written  consent  to any change or  changes  in such  drawings  and
             specifications  submitted as  aforesaid.  The Tenant's  request for
             such  consent  shall be in writing and  accompanied  by an adequate
             description  of  contemplated  work  and with  appropriate  working
             drawings and specifications  thereof. The Landlord's cost of having
             its   architects   or   engineers   examine   such   drawings   and
             specifications  shall be payable by the Tenant.  The  Landlord  may
             require  that  any and  all  work be  performed  by the  Landlord's
             contractors or workmen or by contractors or workmen  engaged by the
             Tenant but in each case only under  written  contract  approved  in
             writing by the  Landlord and subject to all  reasonable  conditions
             which the  Landlord  may impose and  subject to  inspection  by and
             reasonable supervision of the Landlord (including a supervision fee
             to be paid by the Tenant to the Landlord  equal to fifteen  percent
             (15%) of the total  cost of such  work).  The  Landlord  may at its
             option require that only the Landlord's  contractors be engaged for
             any mechanical,  electrical, plumbing, structural or sprinkler work
             to be done in the Leased Premises. Any work performed by or for the
             Tenant shall be performed by competent  workmen  whose labour union
             affiliations are not incompatible with those of any workmen who may
             be employed in the Building by the  Landlord,  its  contractors  or
             subcontractors.  The  cost of all such  work and of all  materials,
             labour  and  services   involved   therein  and  of  all  services,
             necessitated  thereby  shall be at the sole cost and expense of the
             Tenant and shall be completed in a good and workmanlike  manner and
             with reasonable diligence in accordance with the description of the
             work approved by the Landlord. Any such alterations, additions, and
             fixtures shall, when made or installed,  be and become the property
             of the Landlord without payment being made therefor;  provided that
             upon the determination of this Lease the Landlord may at its option
             require the Tenant,  or itself at the Tenant's  expense,  to remove
             the same and to restore  the Leased  Premises to the  condition  in
             which they were at the commencement of this Lease.

7.20         CONSTRUCTION LIENS

             The Tenant  covenants  that he will not suffer or permit during the
             Term  hereof  any  construction  or other  liens for work,  labour,
             services or material ordered by him or for the cost of which he may
             be in any way  obligated  to attach to the Leased  Premises  or the
             Building  or the Land and  that  whenever  and so often as any such
             liens shall attach or claims  therefor  shall be filed,  the Tenant
             shall  within  twenty  (20) days after the Tenant has notice of the
             claim for lien,  procure  the  discharge  thereof  by payment or by
             giving  security  or in such  manner  as is or may be  required  or
             permitted by law.

7.21         SECURITY

             The Tenant will maintain on the Leased Premises sufficient moveable
             property to guarantee the payment of one (1) year's Annual Rent and
             Additional Rent.

7.22         HAZARDOUS SUBSTANCES

             (a)           The Tenant  shall not cause or permit  any  Hazardous
                           Substances to be brought onto,  created in,  released
                           or discharged from, placed or disposed of, at or near
                           the Leased Premises, Building or Lands;

             (b)           The  Tenant  shall  not  cause or permit to occur any
                           violation  of any federal,  provincial,  municipal or
                           local  law,   ordinance,   or   regulation,   now  or
                           hereinafter   enacted  (the   "Laws"),   relating  to
                           environmental conditions on, under, at, near or about
                           the Leased  Premises,  Building or Lands, or relating
                           to the  Landlord,  the Tenant or the  Building,  air,
                           soil or ground  water  condition,  including  without
                           limitation,  the  generation,  storage or disposal of
                           Hazardous Substances;

             (c)           For  the   purposes  of  this   section,   "Hazardous
                           Substances"   means  any   substance,   or  class  of
                           substance  or  mixture  of  substances  which  may be
                           detrimental to the environment, plant or animal life,
                           or human  health and  includes,  without  limitation,
                           flammable,   explosives,  or  radioactive  materials,
                           asbestos, polychlorinated biphenyls (PCBs), chemicals
                           believed to cause  cancer or  reproductive  toxicity,
                           pollutants,  contaminants,  hazardous  wastes,  toxic
                           substances  and  related  materials,   petroleum  and
                           petroleum  products,  any substance that, if added to
                           water, may degrade or alter or form part of a process
                           of  degradation  or  alteration  of  the  quality  or
                           temperature  of that water to the  extent  that it is
                           detrimental to its use by man or by any animal,  fish
                           or plant, and substances  declared to be hazardous or
                           toxic under any law or  regulation  now or  hereafter
                           enacted or promulgated by any governmental  authority
                           having  jurisdiction  over the Landlord,  the Tenant,
                           the   Leased    Premises   or   the   Building   (the
                           "Authorities");

             (d)           The Tenant shall, at its own expense, comply with the
                           Laws;

             (e)           The  Tenant  shall,  at its  own  expense,  make  all
                           submissions to, provide all information  required by,
                           and comply with all  requirements  of the Authorities
                           under the Laws;

             (f)           The Tenant shall indemnify,  defend and hold harmless
                           the Landlord, the Landlord's mortgagees,  any manager
                           of  the  building,  and  their  respective  officers,
                           directors,  beneficiaries,   shareholders,  partners,
                           agents  and   employees,   from  all  fines,   suits,
                           procedures, claims and actions of every kind, and all
                           costs associated therewith (including legal fees on a
                           solicitor  and his own client basis and  consultants'
                           fees) arising out of or in any way connected with any
                           deposit,   spill,  discharge,  or  other  release  of
                           Hazardous  Substances  that occurs during the Term or
                           any  renewal  or  extension  period,  at or from  the
                           Leased Premises, or which arises at any time from the
                           Tenant's use or occupancy of the Leased Premises,  or
                           from the Tenant's failure to provide all information,
                           make all submissions,  and take all steps required by
                           this Section or by the Authorities;

             (g)           Notwithstanding any other provision of this Lease, if
                           the Tenant  creates or brings to the Leased  Premises
                           any  Hazardous  Substances  or if the  conduct of the
                           Tenant's   business  shall  cause  there  to  be  any
                           Hazardous  Substances at or near the Leased Premises,
                           or  discharged  or  released  on,  under or about the
                           Leased Premises, the building or the lands upon which
                           the building is constructed,  the air, soil or ground
                           water, then,  notwithstanding  any rule of law to the
                           contrary,  such  Hazardous  Substances  shall  be and
                           remain the sole and exclusive  property of the Tenant
                           and shall not become the  property  of the  Landlord,
                           notwithstanding  the  degree  of  affixation  to  the
                           Premises  of the  Hazardous  Substances  or the goods
                           containing the Hazardous Substances. This affirmation
                           of the Tenant's interest in the Hazardous  Substances
                           or the  goods  containing  the  Hazardous  Substances
                           shall not however  prohibit the Landlord from dealing
                           with such material as otherwise  provided for in this
                           Lease.

7.23          NUISANCE

              The Tenant  shall not cause or maintain  any  nuisance in or about
              the Leased  Premises,  and shall keep the Leased  Premises free of
              debris,  rodents,  vermin and  anything of a dangerous  noxious or
              offensive  nature or which  could  create a fire  hazard  (through
              undue  load  on   electrical   circuits  or  otherwise)  or  undue
              vibration, heat or noise.

8.00         LANDLORD'S COVENANTS

             The Landlord further covenants with the Tenant:

8.01         QUIET ENJOYMENT

             The Landlord  covenants with the Tenant that if the Tenant pays the
             Annual Rent, Additional Rent and all other sums reserved herein and
             observes and performs the covenants,  conditions and agreements set
             out in this Lease,  the Tenant shall and may peaceably  possess and
             enjoy the Leased Premises  during the Term without  interruption or
             disturbance from the Landlord.

8.02         TAXES, ETC.

             To  pay or  cause  to be  paid  all  taxes  and  rates,  municipal,
             parliamentary  or  otherwise,   including,   without  limiting  the
             generality of the foregoing, water rates with respect to the Lands,
             the Building or assessed  against the Landlord in respect  thereof,
             except  those  directly  assessed  or  charged to or payable by the
             Tenant  or  assessed  or  charged  with  reference  to  the  use or
             occupation of the Leased Premises and except as otherwise  provided
             in this Lease.


8.03         HEATING AND AIR-CONDITIONING

             To provide for heating  and  air-conditioning  so that when heat is
             reasonably  required for the reasonable use of the Leased  Premises
             the  Landlord  will  furnish  heat  therefor  up  to  a  reasonable
             temperature  and  when  the  heating  system  is not in use and the
             Landlord considers that  air-conditioning is reasonably required it
             will operate the air-conditioning systems in the Building. The said
             heating and  air-conditioning  systems  will be  maintained  by the
             Landlord  during normal  business hours except during the making of
             repairs and should the Landlord make default in so doing,  it shall
             not be  liable  for  any  indirect  or  consequential  damages  for
             personal  discomfort or illness due to such  default.  The Landlord
             reserves  the  right to stop the  services  of the  heating  and/or
             air-conditioning equipment when necessary by reason of any accident
             or any repairs,  alterations or improvements which, in the judgment
             of the  Landlord,  are desirable or necessary to be made until such
             repairs, alterations or improvements shall have been completed. The
             Landlord  shall have no further  responsibility  or  liability  for
             failure to supply the said heating and/or air-conditioning  service
             when prevented from doing so, by strikes or by any cause beyond the
             Landlord's  reasonable  control or by orders or  regulations by any
             body or  authority  having  jurisdiction  or by other reason of any
             failure of  electrical  current,  steam or water or suitable  power
             supply or inability  upon the exercise of  reasonable  diligence to
             obtain such electrical current, steam or water for the operation of
             the heating or air-conditioning equipment.

8.04         REPAIR OF STRUCTURE

             To  repair,  replace  and  maintain  the  structural  parts  of the
             Building, and to perform such repairs, replacements and maintenance
             with reasonable dispatch,  and in a good and workmanlike manner, at
             any time  and  from  time to  time,  and  notwithstanding  anything
             contained herein to the contrary,  the Tenant shall not be entitled
             to  compensation  for any  inconvenience,  nuisance  or  discomfort
             occasioned thereby.

8.05         JANITORIAL SERVICES

             To provide  janitorial and cleaning services to the common areas of
             the Building.  The Landlord shall not be responsible for any act of
             omission  or  commission  on the  part  of any  person  or  persons
             employed to clean the Leased Premises or the Building.

8.06         DELAYS IN PROVISION OF SERVICES

             It is  understood  and agreed that  whenever and to the extent that
             the  Landlord  shall be unable to  fulfil,  or shall be  delayed or
             restricted in the fulfilment of any obligation hereunder in respect
             of the supply or  provision  of any service or utility or the doing
             of any work or the making of any repairs by reason of being  unable
             to obtain  the  material,  goods,  equipment,  service,  utility or
             labour required to enable it to fulfil such obligation or by reason
             of any statute,  law or order-in-council or any regulation or order
             passed  or made  pursuant  thereto  or by  reason  of the  order or
             direction  of  any  administrator,  controller  or  board,  or  any
             governmental department or officer or other authority, or by reason
             of not being able to obtain any  permission  or authority  required
             thereby, or by reason of any other cause beyond its control whether
             of the foregoing  character or not, the Landlord  shall be entitled
             to extend  the time for  fulfilment  of such  obligation  by a time
             equal to the duration of such delay or restriction,  and the Tenant
             shall  not be  entitled  to  compensation  for  any  inconvenience,
             nuisance, discomfort, direct or indirect or consequential damage or
             damages thereby occasioned.



9.00         TENANT'S FIXTURES

             The  Tenant  may  install  its usual  trade  fixtures  in the usual
             manner, provided such installation does not damage the structure of
             the Leased  Premises or the Building and provided  further that the
             Tenant shall have submitted  detailed plans and  specifications for
             such trade  fixtures  to the  Landlord  and  obtained  its  written
             consent thereto which consent shall not be unreasonably withheld.

9.01         REMOVAL OF TENANT'S FIXTURES

             Provided that the Tenant may remove his trade or tenant's fixtures;
             provided further,  however,  that all  installations,  alterations,
             additions,  partitions,  and fixtures  other than trade or tenant's
             fixtures in or upon the Leased  Premises,  whether  placed there by
             the Tenant or the Landlord,  shall immediately upon such placement,
             be the Landlord's  property  without  compensation  therefor to the
             Tenant and, except as hereinafter mentioned in this paragraph shall
             not be removed  from the Leased  Premises by the Tenant at any time
             either during or after the term.  Notwithstanding  anything  herein
             contained,  the Landlord  shall be under no obligation to repair or
             maintain  the  Tenant's  installations,   alterations,   additions,
             partitions  and  fixtures  or anything in the nature of a leasehold
             improvement  made or  installed  by the Tenant or Landlord or third
             party; and further,  notwithstanding anything herein contained, the
             Landlord  shall  have the right upon  termination  of this Lease by
             affluxion of time or otherwise or within six (6) months  thereafter
             to require  the Tenant to remove,  or require  the Tenant to pay to
             the Landlord the cost to remove,  any  installations,  alterations,
             additions,  partitions  and fixtures or anything in the nature of a
             leasehold improvement made or installed by the Tenant, the Landlord
             or a third  party,  whether for the Tenant or a previous  occupant,
             and make good any  damage  caused to the  Leased  Premises  by such
             installation or removal.

10.00        DAMAGE OR DESTRUCTION OF LEASED PREMISES

             Provided  that  if  during  the  continuation  of this  Lease,  the
             Building or the Leased  Premises  are  destroyed  or damaged by any
             cause whatsoever, then the following provisions shall apply:

10.01        PARTIAL DAMAGE

             If damage  shall occur to the  Building  or the Leased  Premises so
             that all or part of the Leased  Premises are rendered  untenantable
             by damage  from fire or other  casualty  which,  in the  reasonable
             opinion of the Landlord's architect,  can be substantially repaired
             under  applicable laws and governmental  regulations  within ninety
             (90)  days  from  the  date  of  such  casualty  (employing  normal
             construction  methods  without  overtime  or  other  premium),  the
             Landlord shall cause such damage to be repaired with all reasonable
             speed.

10.02        TOTAL DAMAGE

             If the  Building  or the  Leased  Premises  are  damaged to such an
             extent that the Leased Premises are rendered untenantable by damage
             from fire or other casualty which, in the reasonable opinion of the
             Landlord's  architect,   cannot  be  substantially  repaired  under
             applicable  laws and  governmental  regulations  within ninety (90)
             days from the date of such casualty  (employing normal construction
             methods  without  overtime  or  other  premium),  then  either  the
             Landlord or Tenant may elect to terminate this Lease as of the date
             of such casualty by written notice  delivered to the other not more
             than  ten (10)  days  after  receipt  of such  architect's  opinion
             (failing  which the Landlord shall cause such damage to be repaired
             at its own expense with all reasonable speed).



10.03        OBLIGATION TO REPAIR

             The  Landlord's  obligation to repair as set forth in the preceding
             two paragraphs  hereof is conditional  upon the Landlord  receiving
             adequate proceeds from policies of insurance  maintained in respect
             of such  casualties  or, if such proceeds are not made available to
             the Landlord, the Landlord electing to obtain its own financing for
             such  repairs.  In the event that no such proceeds of insurance are
             available to the Landlord and if the Landlord  elects not to obtain
             its own  financing for such repairs,  then the Landlord  shall,  by
             notice in  writing  to the  Tenant  delivered  within ten (10) days
             after receipt of the opinion of the  Landlord's  architect,  notify
             the Tenant that the Lease is terminated, which termination shall be
             effective  as of the  date of such  casualty.  In  calculating  the
             amount of insurance proceeds available, the Landlord will be deemed
             to have received the deductible portion of any insurance policy.

10.04        ABATEMENT OF RENT

             If the  Landlord is  required to repair the damage  pursuant to the
             provisions  hereof and does not elect to terminate  the Lease,  the
             Annual Rent and  Additional  Rent  payable by the Tenant under this
             Lease  shall be  proportionately  reduced  to the  extent  that the
             Leased Premises are thereby rendered  unusable by the Tenant in its
             business  from the date of such  casualty  until  completion by the
             Landlord of the repairs to the Leased  Premises and the Building so
             that the Leased Premises are thereafter  fully usable by the Tenant
             in its business.

10.05        DAMAGE TO 50% OF BUILDING

             Notwithstanding  anything  otherwise  contained  in this Lease,  if
             fifty percent (50%) or more of the rentable area of the Building is
             damaged  or  destroyed  and if, in the  reasonable  opinion  of the
             Landlord's  Architect,  the said rentable area cannot be rebuilt or
             made fit for the purposes of the tenants thereof within ninety (90)
             days of the date of such casualty, the Landlord may, at its option,
             terminate  this Lease by giving notice of termination to the Tenant
             within thirty (30) days of the date of such casualty and the Tenant
             shall,  with reasonable  dispatch and expedition,  but in any event
             within sixty (60) days after delivery of the notice of termination,
             deliver up  possession  of the Leased  Premises to the Landlord and
             the  rent and  other  payments  for  which  the  Tenant  is  liable
             hereunder  shall be apportioned  and paid to the date possession is
             so delivered up.

10.06        COMPLETION OF REPAIR

             Provided  that,  if,  upon the  completion  by the  Landlord of any
             repairs  required as a result of any such  destruction or damage, a
             dispute  shall  arise  between  the  Landlord  and the Tenant as to
             whether  or not the  Leased  Premises  have  been  made fit for the
             purposes of the Tenant under this Lease,  the Landlord  may, at its
             option,  terminate  this Lease by giving thirty (30) days notice to
             the Tenant and if such notice shall be given this Lease  shall,  at
             the  expiration  of such period,  be at an end and the Tenant shall
             deliver  up the  Leased  Premises  to the  Landlord  or whom it may
             appoint and the  Landlord  may, on demand,  recover the full rental
             hereby  reserved  computed from the date on which such repairs were
             completed up to the date on which the Tenant is required to vacate.

11.00        LIABILITY FOR DAMAGE TO PROPERTY

             In the absence of  negligence  or wilful act or default on the part
             of the  Landlord,  its  servants,  agents or workmen,  the Landlord
             shall not be liable or responsible in any way for any loss,  damage
             or  injury  to any  person  or for  any  loss of or  damage  to any
             property  belonging to the Tenant, to employees of the Tenant or to
             any other person while such  property is in the Leased  Premises or
             in the Building or in or on the  surrounding,  Lands and  buildings
             owned by the  Landlord,  the  areaways,  the parking  garages,  the
             parking  areas,   lawns,   sidewalks,   reflective  pools,   steps,
             platforms,  corridors,  stairways or  elevators  whether or not any
             such  property has been  entrusted to employees of the Landlord and
             without  limiting the  generality  of the  foregoing,  the Landlord
             shall not be liable for any damage to any such  property  caused by
             theft or breakage or by steam,  water,  rain or snow which may leak
             into,  issue  or flow  from any  part of the  Building  or from the
             water, steam or drainage pipes or plumbing works of the Building or
             from any other  place or  quarter  or for any  damage  caused by or
             attributable  to the  condition or  arrangement  of any electric or
             other wiring or for any damage  caused by smoke or anything done or
             omitted by any other  tenant in the  Building or for any other loss
             whatsoever  with  respect  to the  Leased  Premises,  goods  placed
             therein or any business carried on therein.


12.00        DEFAULT OF TENANT

             Provided and it is hereby expressly agreed that if and whenever the
             Annual Rent or Additional  Rent hereby reserved or any part thereof
             shall not be paid on the day appointed for payment thereof, whether
             lawfully demanded or not, or in case of breach or non-observance or
             non-performance  of  any of the  covenants,  agreements,  provisos,
             conditions or Rules and Regulations on the part of the Tenant to be
             kept,  observed or performed,  or in case the Leased Premises shall
             be vacated or remain  unoccupied  for fifteen  (15) days or in case
             the Term shall be taken in  execution or  attachment  for any cause
             whatever,  then and in every such case,  it shall be lawful for the
             Landlord  thereafter to enter into and upon the Leased  Premises or
             any  part  thereof  in the name of the  whole  and the same to have
             again,  repossess  and enjoy as of its former  estate,  anything in
             this Lease contained to the contrary notwithstanding other than the
             proviso to this paragraph;  PROVIDED that the Landlord shall not at
             any time have the  right to  re-enter  and  forfeit  this  Lease by
             reason of the Tenant's  default in the payment of the rent reserved
             by this Lease,  unless and until the  Landlord  shall have given to
             the Tenant written  notice setting forth the default  complained of
             and the Tenant shall have the right  during five (5) business  days
             next  following the date on such notice to cure any such default in
             payment  of  rent.  In case  without  the  written  consent  of the
             Landlord,  the Leased  Premises  shall be used by any other  person
             than the  Tenant or for any other  purpose  than that for which the
             same were let or in case the Term or any of the goods and  chattels
             of  the  Tenant  shall  be at  any  time  seized  in  execution  or
             attachment by any creditor of the Tenant or if the Tenant makes any
             bulk sale, then in any such case this lease shall, at the option of
             the Landlord,  cease and  determine and the Term shall  immediately
             become  forfeited  and void in  accordance  with the  provisions of
             Section 15, RIGHT OF TERMINATION, herein.

13.00        BANKRUPTCY

             Provided  further that, in case without the written  consent of the
             Landlord,  the Leased  Premises  shall be used by any other  person
             than the Tenant or for any other  purposes  than that for which the
             same were let or in case the Term or any of the goods and  chattels
             of  the  Tenant  shall  be at  any  time  seized  in  execution  or
             attachment  by any  creditor of the Tenant or by the Tenant  making
             any  assignment  for the benefit of  creditors  or any bulk sale or
             become  bankrupt or insolvent or take the benefit of any act now or
             hereafter in force for bankrupt or  insolvent  debtors,  or, if the
             Tenant is a corporation and any order shall be made for the winding
             up of the Tenant, or other  termination of the corporate  existence
             of the  Tenant,  then in any such case  this  Lease  shall,  at the
             option of the  Landlord,  cease and  determine  and the Term  shall
             immediately  become forfeited and void and the then current month's
             rent and the next  ensuing  three (3) months rent and in  addition,
             all cash allowances,  tenant  inducement  payments and the value of
             any  other  benefit  paid to or  conferred  on the  Tenant by or on
             behalf  of  the  Landlord  in  connection  with  this  Lease  shall
             immediately  become due and be paid and the  Landlord  may re-enter
             and take  possession of the Leased Premises as though the Tenant or
             other  occupant or  occupants  of the Leased  Premises  was or were
             holding  over after the  expiration  of the Term  without any right
             whatever.

14.00        RE-ENTRY BY LANDLORD

             The Tenant  further  covenants  and agrees  that on the  Landlord's
             becoming entitled to re-enter upon the Leased Premises under any of
             the  provisions  of this Lease,  the  Landlord,  in addition to all
             other rights,  shall have the right to enter the Leased Premises as
             the agent of the Tenant either by force or otherwise, without being
             liable  for  any  prosecution  therefor  and to  relet  the  Leased
             Premises  as the  agent  of the  Tenant,  and to  receive  the rent
             therefor and as the agent of the Tenant,  to take possession of any
             furniture or other property on the Leased  Premises and to sell the
             same at public or  private  sale  without  notice  and to apply the
             proceeds  of such  sale and any rent  derived  from  reletting  the
             Leased Premises upon account of the rent under this Lease,  and the
             Tenant shall be liable to the Landlord for the deficiency, if any.

15.00        RIGHT OF TERMINATION

             The  Tenant  further  covenants  and  agrees  that on the  Landlord
             becoming entitled to re-enter upon the Leased Premises under any of
             the  provisions  of this Lease,  the  Landlord,  in addition to all
             other  rights,  shall have the right to  determine  forthwith  this
             Lease and the Term by leaving  upon the Leased  Premises  notice in
             writing of its  intention  so to do, and  thereupon,  rent shall be
             computed,  apportioned  and  paid  in  full  to the  date  of  such
             determination  of this Lease and any other  payments  for which the
             Tenant is liable  under  this  Lease  shall be paid and the  Tenant
             shall  immediately  deliver up possession of the Leased Premises to
             the Landlord,  and the Landlord may re-enter and take possession of
             the same  without  limiting the  generality  of the  foregoing,  in
             addition  to any other  rights the  Landlord  may have  against the
             Tenant,  in the event the  Tenant  wishes to  terminate  this Lease
             early,  the Tenant shall be liable for the  unamortized  balance of
             the cost of the Leasehold Improvements,  amortized over the Term of
             the Lease on a straight line basis.

16.00        DISTRESS

             The  Tenant  waives and  renounces  the  benefit of any  present or
             future  statute  taking away or limiting  the  Landlord's  right of
             distress,  and covenants and agrees that  notwithstanding  any such
             statute, none of the goods and chattels of the Tenant on the Leased
             Premises  at any time  during the Term shall be exempt from levy by
             distress  for rent in arrears.  In the event that the Tenant  shall
             remove or permit the removal of any of its goods or  chattels  from
             the Leased  Premises,  the  Landlord  may within  thirty  (30) days
             thereafter  and if the  Tenant is in  arrears  of rent,  seize such
             goods and  chattels  wherever the same may be found and may sell or
             otherwise  dispose  of  the  same  as if  they  had  actually  been
             distrained  upon the Leased Premises by the Landlord for arrears of
             rent.

17.00        NON-WAIVER

             No  condoning,  excusing  or  overlooking  by the  Landlord  of any
             default,  breach  or  non-observance  by the  Tenant at any time or
             times in  respect of any  covenant,  proviso  or  condition  herein
             contained  shall  operate  as a  waiver  of the  Landlord's  rights
             hereunder  in  respect of any  continuing  or  subsequent  default,
             breach or  non-observance,  or so as to defeat or affect in any way
             the rights of the Landlord herein in respect of any such continuing
             or  subsequent  default or breach,  and no waiver shall be inferred
             from or implied by anything  done or omitted by the  Landlord  save
             only  express  waiver in  writing.  All rights and  remedies of the
             Landlord  in this  Lease  contained  shall  be  cumulative  and not
             alternative.




18.00        CHANGES TO BUILDING

             The Landlord hereby reserves the right at any time and from time to
             time  to  make  changes  in,  additions  to,  subtractions  from or
             rearrangements of the Building including,  without limitation,  all
             improvements at any time thereon,  all entrances and exits thereto,
             and to grant,  modify and terminate  easements or other  agreements
             pertaining  to the  use  and  maintenance  of all or  parts  of the
             Building and to make  changes or additions to the pipes,  conduits,
             utilities  and other  necessary  building  services  in the  Leased
             Premises  which serve other  premises,  provided  that prior to the
             commencement  of the Term,  the  Landlord may alter or relocate the
             Leased  Premises to the extent  found  necessary by the Landlord to
             accommodate changes in construction design or facilities  including
             major  alterations  and  relocations.  The Landlord  agrees that in
             performing  such  alterations,  it shall do so in a manner so as to
             minimize  any  material  interference  with  the  Tenant's  use and
             enjoyment of the Leased Premises.  The Landlord shall also have the
             right  during the Term at its  reasonable  expense to relocate  the
             Leased Premises to an alternate location within the Kanata Research
             Business Park in a building owned by the Landlord.

19.00        SEVERANCE OF LAND

             The  Landlord  shall have the right from time to time to sever (for
             purposes of sale, lease, mortgage, charge or otherwise) any part or
             parts  of  the  Land  or any  buildings  or  improvements  thereon,
             including  the  creation of  rights-of-way,  easements  and parking
             arrangements  which the  Landlord  deems  necessary  and the Tenant
             hereby consents to any such severance and agrees to execute,  at no
             cost to the Landlord,  any documents or consents which the Landlord
             may request for these purposes. If any part or parts of the Land or
             the buildings or  improvements  on the lands are so severed and are
             deemed by the Landlord to no longer form part of the property, such
             part or parts shall be excluded from the Lands and the property for
             the purposes of this Lease at the time  designated  by the Landlord
             and the Tenant shall when requested by the Landlord, execute, at no
             cost to the  Landlord,  a release of any  interest  in the Lands so
             excluded.

20.00        COSTS OF COLLECTION

             The Tenant shall pay, as Additional  Rent, all costs,  expenses and
             legal  fees  (on a  solicitor  and his  client  basis)  that may be
             incurred or paid by or on behalf of the Landlord in  enforcing  the
             covenants and provisions of this Lease.

21.00        PROFITS AND REMEDIES BY LANDLORD

             In addition to all rights and  remedies  available  to the Landlord
             under the provisions of this Lease or by statute or the general law
             in the event of any default by the Tenant of the provisions of this
             Lease:

21.01        PAYMENTS TO THIRD PARTIES

             The Landlord shall have the right at all times to remedy or attempt
             to remedy any default of the Tenant,  and in so doing, may make any
             payments  due or alleged  to be due by the Tenant to third  parties
             and may  enter  upon the  Leased  Premises  to do any work or other
             things  therein,  and in any such event,  all costs and expenses of
             the  Landlord in  remedying  or  attempting  to remedy such default
             shall be  payable  by the  Tenant to the  Landlord  forthwith  upon
             demand as Additional Rent.

21.02        NON-PAYMENT OF ADDITIONAL RENT

             The  Landlord  shall have the same rights and remedies in the event
             of any  non-payment  by the  Tenant of any  amounts  payable by the
             Tenant under any provision of this Lease and the parking  agreement
             as in the case of  non-payment  of rent and may be recovered by the
             Landlord as rent by any and all remedies  available to the Landlord
             for the recovery of rent in arrears.

21.03        INTEREST ON ARREARS

             The  Landlord  shall,  if the Tenant  shall fail to pay any Monthly
             Rent, Additional Rent or other amounts from time to time payable by
             it to the  Landlord  hereunder  promptly  when due,  be entitled to
             interest on all such Annual Rent, Additional Rent and other amounts
             which are unpaid  and  overdue  under  this  Lease and the  parking
             agreement, such interest to be compounded monthly thereon and to be
             computed at a rate equal to six percent (6%) per annum in excess of
             the minimum lending rate to prime commercial borrowers from time to
             time  charged by the Royal  Bank of Canada or such other  chartered
             bank as the Landlord may  designate,  from the date upon which such
             Monthly  Rent,  Additional  Rent and  other  amounts  was due until
             actual payment thereof.

22.00        NOTICE

             Any notice required or contemplated by any provisions of this Lease
             shall be given in writing, enclosed in a sealed envelope addressed,
             in the case of notice to the  Landlord  c/o  Kanata  Research  Park
             Corporation,  Suite 206, 555 Legget Drive, Kanata, Ontario, Canada,
             K2K  2X3 and in the  case of  notice  to the  Tenant,  to it at the
             Leased Premises and mailed by registered  mail,  postage prepaid or
             telefaxed.  The time of giving of such notice shall be conclusively
             deemed to be, if mailed the third (3rd)  business day after the day
             of such mailing, if telefaxed,  the next business day following the
             date sent as  evidenced by the sender's  transmittal  record.  Such
             notice shall also be sufficiently  given if and when the same shall
             be  delivered,  in  the  case  of  notice  to the  Landlord,  to an
             executive officer of the Landlord, and in the case of notice to the
             Tenant, to him personally or to an executive officer,  manager or a
             person who appears to be in charge,  of the Tenant if the Tenant is
             a corporation.  Such notice,  if delivered,  shall be  conclusively
             deemed  to  have  been  given  and  received  at the  time  of such
             delivery.  If,  in this  Lease,  two or more  persons  are named as
             Tenant,  such notice shall also be  sufficiently  given if and when
             the same shall be delivered  personally to any one of such persons.
             Provided  that either party may, by notice to the other,  from time
             to time,  designate  another  address  in Canada  to which  notices
             mailed more than ten (10) days thereafter  shall be addressed.  The
             word "notice" in this paragraph shall include any request,  demand,
             direction,  or statement in this Lease  provided or permitted to be
             given  by the  Landlord  to the  Tenant  or by  the  Tenant  to the
             Landlord.

23.00        SUBORDINATION, POSTPONEMENT, ATTORNMENT

             The Tenant shall promptly upon the written request of the Landlord,
enter into an agreement:

             (a)      subordinating  the  Term  and  the  rights  of the  Tenant
                      hereunder to any mortgage,  charge,  ground  lease,  trust
                      deed or  debenture  present  or future  and all  renewals,
                      modifications,  replacements or extensions thereof,  which
                      may affect the Leased Premises, the Property, the Lands or
                      the Building;

             (b)      agreeing  that the Term  hereof  shall  be  subsequent  in
                      priority to any such mortgage, charge, ground lease, trust
                      deed or debenture;

             provided that the Tenant's  obligations  under this paragraph shall
             be  conditional  upon any such  mortgagee or secured party entering
             into a  non-disturbance  agreement  with the Tenant under which the
             Tenant's  continued  possession  of the Leased  Premises is ensured
             notwithstanding any act taken by the mortgagee or secured party.



23.01        TENANT'S RIGHT TO POSSESSION

             Notwithstanding  any  postponement  or  subordination  referred  to
             herein,  the Tenant  acknowledges  that its obligations  under this
             Lease  shall  remain in full force and effect  notwithstanding  any
             action at any time taken by a mortgagee,  chargee or ground  lessor
             to enforce the security of any mortgage charge, ground lease, trust
             deed or debenture;  provided,  however,  that any  postponement  or
             subordination given hereunder shall reserve to the Tenant the right
             to continue in possession of the Leased Premises under the terms of
             this Lease so long as the Tenant shall not be in default hereunder.



23.02        ATTORNMENT BY TENANT

             The Tenant,  whenever  requested by any  mortgagee  (including  any
             trustee  under a deed of trust  and  mortgage),  chargee  or ground
             lessor, shall attorn to such mortgagee, chargee or ground lessor as
             a tenant upon all the terms of this Lease.


24.00        CERTIFICATE

             The  Tenant  agrees  that he will at any time and from time to time
             upon not less than five (5) days' prior notice  execute and deliver
             to the Landlord or any mortgagee of the Lands  (including a deed of
             trust and  mortgage) a statement  in writing  certifying  that this
             Lease is unmodified  and in full force and effect (or, if modified,
             stating  the  modifications  and that the same is in full force and
             effect as  modified),  the amount of the Annual  Rental  then being
             paid  hereunder,  the dates to which the same,  by  instalments  or
             otherwise,  and other charges hereunder have been paid, and whether
             or not there is any existing default on the part of the Landlord of
             which the Tenant has notice.

25.00        REGISTRATION

             The Tenant  covenants  and agrees with the Landlord that the Tenant
             will not register this Lease in this form in any Registry Office or
             the  Land  Titles   Office.   If  the  Tenant  desires  to  make  a
             registration  for the purposes only of giving notice of this Lease,
             then the parties hereto shall  contemporaneously with the execution
             of this Lease  execute a short form thereof  solely for the purpose
             of supporting an application for registration of notice thereof.

26.00        PLANNING ACT

             Where applicable, this Lease shall be subject to the condition that
             it is  effective  only if The  Planning  Act,  1983,  as amended is
             complied  with.  Pending such  compliance  the Term and any renewal
             thereof  shall be deemed  to be for a total  period of one (1) year
             less than the maximum  lease Term  permitted  by law  without  such
             compliance.

27.00        TRANSFER BY LANDLORD

             In the event of a sale,  transfer  or lease by the  Landlord of the
             Building,  the Lands or a portion  thereof  containing  the  Leased
             Premises  or the  assignment  by the  Landlord of this Lease or any
             interest of the Landlord  hereunder,  the Landlord  shall,  without
             further  written  agreement,  to the  extent  that such  purchaser,
             transferee  or  lessee  has  become  bound  by  the  covenants  and
             obligations  of the  Landlord  hereunder,  be freed,  released  and
             relieved of all liability or obligations  under this Lease incurred
             or arising after the date of such sale, transfer or lease.



28.00        NO ADVERTISING OF LEASED PREMISES

             The Tenant shall not print, publish, post, display or broadcast any
             notice or advertisement to the effect that the whole or any part of
             the  Leased  Premises  are for rent,  and it shall not  permit  any
             broker or other  person to do so without  the consent in writing of
             the Landlord.

29.00        TIME OF ESSENCE

             Time shall be of the essence of this Lease.

30.00        LAWS OF ONTARIO

             This  Lease  shall be  deemed  to have  been  made in and  shall be
             construed in accordance with the Laws of the Province of Ontario.

31.00        SEVERABILITY OF COVENANTS

             The  Landlord and the Tenant  agree that all of the  provisions  of
             this Lease are to be  construed  as  covenants  and  agreements  as
             though the words  importing such covenants and agreements were used
             in  each  separate  paragraph  hereof.   Should  any  provision  or
             provisions of this Lease be illegal or not  enforceable  it or they
             shall be considered  separate and severable  from the Lease and its
             remaining  provisions shall remain in force and be binding upon the
             parties hereto as though the said provision or provisions had never
             been included.

32.00        HEADINGS

             The captions  appearing in the margin or the headings  contained in
             this Lease have been  inserted as a matter of  convenience  and for
             reference only and in no way define,  limit or enlarge the scope or
             meaning of this Lease or of any provision hereof.

33.00        SCHEDULES

             The following Schedules attached hereto form part of this Lease:
             Schedules:  A, B, C, D, E, F, and G

34.00        LEASE ENTIRE AGREEMENT

             The   Tenant    acknowledges   that   there   are   no   covenants,
             representations,  warranties, agreements or conditions expressed or
             implied,  collateral  or  otherwise  forming  part of or in any way
             affecting  or relating to this Lease save as  expressly  set out in
             this Lease and that this  Lease  constitutes  the entire  agreement
             between the Landlord and the Tenant and may not be modified  except
             as herein explicitly provided or except by subsequent  agreement in
             writing of equal formality  hereto executed by the Landlord and the
             Tenant.

35.00        INTERPRETATION

             IN THIS INDENTURE:

             (a)      "herein",  "hereof",  "hereby",   "hereunder",   "hereto",
                      "hereinafter",  and  similar  expressions  refer  to  this
                      indenture and not to any particular paragraph,  section or
                      other  portion  thereof,  unless there is something in the
                      subject matter or context inconsistent therewith.

             (b)      "business  day(s)"  means any of the days  from  Monday to
                      Friday  of  each  week  inclusive  unless  such  day  is a
                      statutory holiday or public holiday.

             (c)      "normal  business hours" means the hours from 8:00 a.m. to
                      6:00 p.m. on business days.

36.00        SUCCESSORS

             This indenture and everything  herein  contained shall enure to the
             benefit of and be binding  upon the  respective  heirs,  executors,
             administrators, permitted successors and assigns, of the Tenant and
             other legal  representatives  as the case may be, of each and every
             of the  parties  hereto,  and every  reference  herein to any party
             hereto  shall   include  the  heirs,   executors,   administrators,
             permitted  successors,  assigns and other legal  representatives of
             such  party,  and where there is more than one tenant or there is a
             female party or a corporation,  the provisions hereof shall be read
             with all grammatical and gender changes thereby rendered  necessary
             and all covenants shall be deemed joint and several.

37.00        JOINT AND SEVERAL COVENANT

             If more than one person  executes  this Lease as Tenant,  each such
             person  shall be bound  jointly and  severally  with the  other(s),
             waiving the benefit of division and discussion,  for the fulfilment
             of all of the obligations of Tenant hereunder.


             IN WITNESS  WHEREOF the parties hereto have hereunto  affixed their
corporate  seals duly attested to by the hands of their proper signing  officers
authorized in that behalf.


SIGNED, SEALED AND DELIVERED    )
in the presence of:             )     KANATA RESEARCH PARK
                                )     CORPORATION
                                )
                                )
                                )
                                ) Per:_________________________________________

                                ) Name:
                                ) Title:                                  c/s
                                ) I have the authority to bind the corporation.
                                )
                                )      PMC-SIERRA LTD.
                                )
                                )
                                )
                                ) Per:_________________________________________
- ---------------------------
Witness                         ) Name:
                                ) Title:                                  c/s
                                )
                                )
                                ) Per:_________________________________________
- ---------------------------
Witness                         ) Name:
                                ) Title:
                                )
                                ) I/We have the authority to bind the
                                  corporation.





                                  SCHEDULE "A"

                                LEGAL DESCRIPTION



         411 Legget Drive - Legal  Description to be provided once severance has
been completed.




                                   SCHEDULE "B

                                   FLOOR PLAN





                                  SCHEDULE "C"
                              RULES AND REGULATIONS

The Tenant and its invitees and employees  shall observe the following rules and
regulations  (as  added  to,  amended  or  modified  from  time  to  time by the
Landlord).

1.           The  sidewalks,  entrances,   elevators,  stairways,   passageways,
             shipping   areas  and  corridors  of  the  Building  shall  not  be
             obstructed  or used for any other  purpose by the  Tenant  than for
             ingress  and  egress to and from the  Leased  Premises;  the Tenant
             shall not place or allow to be placed in such  areas or  facilities
             any waste  paper,  garbage,  refuse or anything  that shall tend to
             make them appear unclean or untidy.

2.           The  Tenant  and its  employees  shall use  washrooms  only for the
             purpose for which they were designed and nothing shall be placed in
             toilets that might cause them to block.

3.           Between peak periods,  the elevators will be used for  transporting
             passengers  only and during these periods no large parcels or items
             of equipment will be permitted on the  elevators.  Peak periods are
             between 8 a.m.  and 10 a.m. in the  morning,  between 12 noon and 2
             p.m. in the afternoon and between 4 p.m. and 6 p.m. in the evening.

4.           The Tenant shall make  arrangements with the Landlord ahead of time
             when  elevators  are to be used for carrying  freight or furniture,
             etc..  Elevators  must  not be used  for  this  purpose  until  the
             Landlord  has given its  consent  and the  elevator  cabs have been
             properly protected.

5.           The  Landlord's  janitors  shall be permitted  prompt access to the
             Leased  Premises  for the  purpose of  cleaning  the  office  areas
             thereof.

6.           The  Tenant  shall not make any noise  which  might  disturb  other
             tenants  and no  animals or  bicycles  or other  vehicles  shall be
             brought into the Leased Premises or the Building.

7.           The  Leased  Premises  shall  not be  used  as  overnight  sleeping
             accommodation, for public sales nor for entertaining purposes.

8.           The Tenant shall make  arrangements with the Landlord ahead of time
             if any public meeting is to be held in the Leased  Premises and the
             meeting shall not be held until the Landlord's  written  consent is
             obtained.

9.           The Tenant shall make  arrangements with the Landlord ahead of time
             to install any business  machines,  electric  appliances,  etc. and
             these  installations  will not be made until the Landlord's consent
             is obtained.

10.          Windows will not be left open so as to admit rain or snow.

11.          The  Tenant  will  not  alter  any  existing  locks  nor  will  any
             additional  locks or  similar  devices be  attached  to any door or
             window.

12.          Keys or other  devices  which are made  available to the Tenant for
             the  purpose  of  providing  access  to the  exterior  doors of the
             Building  shall  not be  duplicated  and shall be  returned  to the
             Landlord immediately upon termination of the Lease.

13.          All  adjustments  to  mechanical  equipment  such  as  thermostats,
             radiators,  diffusers,  etc. shall be made by the Landlord's  staff
             and no one else.

14.          If the Tenant  wishes to install any drapes or blinds in any of the
             windows on the  exterior  of the  Building  or on any window of the
             Leased Premises facing the interior of the Building, the Landlord's
             prior  written  consent  must be obtained and further the drapes or
             blinds  installed  must  conform  to a  uniform  colour  which  the
             Landlord may at its absolute discretion establish.

15.          The Tenant shall not place  anything  next to or have  displayed in
             the windows of the Leased  Premises facing into the common areas so
             as to visible  therein,  without the prior  written  consent of the
             Landlord.

16.          No  admittance by the Tenant or its agents is permitted on the roof
             or equipment rooms of the Building.

17.          It shall be the  responsibility of the Tenant to prevent any person
             from  throwing  objects out of windows,  off of any balcony or into
             the ducts or stairwells  of the Building,  and the Tenant shall pay
             for any cost, damage or injury resulting from any such acts.

18.          The Tenant shall provide adequate  receptacles for garbage,  refuse
             and waste paper and all such garbage,  refuse and waste paper shall
             be placed in such containers.  The Leased Premises shall be kept in
             a tidy, healthy and clean condition.

19.          The  Tenant  shall not bring upon the  Leased  Premises  any safes,
             heavy  equipment,  motors or any other thing  which might  overload
             floors or damage the Leased Premises or the Building.

20.          The Landlord may require that all persons  entering and leaving the
             Building   at  any  time   other   than   normal   business   hours
             satisfactorily  identify  themselves and register in books kept for
             the  purpose,  and may prevent any person from  entering the Leased
             Premises  unless  provided  with a key  thereto and a pass or other
             authorization  from  the  Tenant  in a  form  satisfactory  to  the
             Landlord,  and may prevent any person  removing any goods therefrom
             without written authorization.

21.          The  Tenant  shall  not use or keep  inflammable  materials  in the
             Leased Premises or on any balcony of the Building.

22.          The Landlord shall not be responsible for any theft, loss or damage
             to vehicles  parked  therein  whatsoever,  or for any injury to the
             Tenant or others in or on the  parking  facilities  whether  or not
             parking charges are imposed.

23.          The  Landlord   shall  have  the  right  to  establish   rules  and
             regulations  governing the use of the parking  facilities from time
             to time and the Tenant  hereby  agrees to observe  and abide by all
             such rules and regulations.

24.          All moving of the Tenant's  chattels  and trade  fixtures and other
             fixtures from or to the Leased  Premises  shall be performed  after
             business hours and shall be supervised by the Landlord,  its agents
             or a security guard all at the Tenant's expense.

25.          Smoking is  prohibited  in all common  areas of the Building and on
             all balconies of the Building.

26.          The Tenant shall not place and/or operate a barbecue on any balcony
             of the Building.  The Tenant shall not hang anything on or from any
             balcony of the  Building,  nor shall the Tenant use the balcony for
             storage, nor shall the Tenant install or erect any antenna, aerial,
             satellite dish or other telecommunication  device on any balcony of
             the  Building,  nor  shall the  Tenant  place or allow to be placed
             waste paper or other garbage on the balcony of the Building. Summer
             furniture  only may be placed on a balcony of the Building and only
             with the prior approval of the Landlord.

The  foregoing  rules and  regulations,  as from time to time  amended,  are not
necessarily of uniform  application,  but subject to 7.02 may be waived in whole
or in part in respect of other tenants without  affecting  their  enforceability
with respect to the Tenant or the Leased Premises. There is no obligation on the
Landlord to enforce the rules and  regulations,  and the  Landlord  shall not be
liable by reason of their non-enforcement.



                                  SCHEDULE "D"

                                     PARKING


1.           During  the Term,  and any  extensions  of the Term,  the  Landlord
             agrees to allow the Tenant to park,  without  charge,  Three  point
             Thirty Eight (3.38)  vehicles  per One  Thousand  (1,000)  rentable
             square feet of Leased Premises,  in the parking  facilities located
             on the Lands ("parking facilities").

2.           The Landlord shall not be responsible for any theft, loss or damage
             to the Tenant's vehicles whatsoever, or for injury to the Tenant or
             others in the parking facilities.

3.           The  Landlord   shall  have  the  right  to  establish   rules  and
             regulations  governing the use of the parking  facilities from time
             to time and the Tenant  hereby  agrees to observe  and abide by all
             such rules and regulations.




                                  SCHEDULE "E"

                                 OPTION TO RENEW


1.           Provided  the Tenant is in good  standing,  during the Term has not
             been in  substantial  default under this Lease and has not assigned
             this Lease or sublet all or a portion of the Leased  Premises,  the
             Tenant  shall  have and is hereby  granted  an option to renew this
             Lease for a further term of Five (5) years, at an Annual Rent to be
             agreed upon, which shall be at the then current rates for buildings
             of the Landlord of a similar  class and with golf course  frontage,
             but  which  shall in no event be less  than the  Annual  Rent  paid
             during  the  last  year of the  Term,  provided  that in  order  to
             exercise  this option,  the Tenant shall be required to give to the
             Landlord  notice of the exercise of such option in writing not less
             than six (6)  months  prior to the date of  expiry  of the  initial
             Term.

2.           Any renewal pursuant to this proviso shall be on the same terms and
             conditions contained in this Lease except:

             (a)      there shall be no additional right of renewal and no
                      Leasehold Improvements;

             (b)      the Annual  Rent  payable  by the Tenant for such  renewal
                      period shall be as agreed upon by the Landlord and Tenant;
                      such  agreement  to be  reached  not later  than three (3)
                      months prior to the expiry of the original  Term.  Failing
                      such agreement,  this option shall be null and void and of
                      no further force and effect.



                                  SCHEDULE "F"

                             LEASEHOLD IMPROVEMENTS


The Landlord  shall,  at its sole cost and  expense,  construct on behalf of the
Tenant and  install on a turnkey  basis to  building  standards  up to a maximum
value equal to Eighteen  Dollars  ($18.00)  per  rentable  square foot of Leased
Premises  with  the  Tenant  paying  the  overrun,   if  any,  those   leasehold
improvements  agreed upon by both  Landlord  and Tenant.  The turnkey cost shall
include the Landlord's administrative costs which relate to the work. The Tenant
shall be  required  to  provide  to the  Landlord  a  complete  set of  approved
construction  drawings  and  specifications  for the Leased  Premises by July 4,
2000,  failing which rent shall still commence on the  Commencement  Date of the
Term. The Additional  Leased  Premises shall, at the sole cost of the Tenant (to
be deducted from the Leasehold Improvement  Allowance),  be painted and carpeted
to the Tenant's  specifications  prior to the Commencement  Date. Any additional
leasehold  improvements  the  Tenant may wish to make to the  Additional  Leased
Premises  shall be made by the  Landlord  after  November 1, 2001.  The Landlord
shall be liable for any damage to the carpet  prior to November 1, 2000 save and
except  reasonable  wear and tear but the condition of the carpet as at November
1, 2000 shall not affect the obligation of Tenant to pay rent for the Additional
Leased Premises commencing November 1, 2001.



                                  SCHEDULE "G"

                                ADDITIONAL TERMS


1.       RELEASE AGREEMENT

Upon the  Commencement  Date the  Landlord  hereby  agrees that the Tenant,  its
successors and assigns shall be released and forever  discharged of and from all
manner of actions, causes of action, suits, debts, duties, accounts,  covenants,
contracts,  claims and demands  whatsoever  which the  Landlord  now has or can,
shall or may  hereafter  have against the Tenant,  its  successors  and assigns,
arising  out of or under or by virtue of the Lease as it  relates  to 555 Legget
Drive save and except for any current  leasehold  improvement costs to which the
Tenant has been  invoiced  and any year end  Additional  Rent  adjustments  with
respect to that period of time up to and  including  the  Commencement  Date for
which the Tenant shall remain liable.

So long as the Tenant  vacates the 1st floor of 555 Legget  Drive by the earlier
of the date of  substantial  completion  of the  First  Leased  Premises  of the
Commencement  Date, the Landlord  hereby agrees that the Tenant,  its successors
and assigns  shall as of April 1, 2001 or the date of  occupancy by a new tenant
whichever is earlier,  be released and forever discharged of and from all manner
of  actions,  causes of  action,  suits,  debts,  duties,  accounts,  covenants,
contracts,  claims and demands  whatsoever  which the  Landlord  now has or can,
shall or may  hereafter  have against the Tenant,  its  successors  and assigns,
arising out of or under or by virtue of the Lease as it relates to the 1st floor
of 555 Legget Drive save and except for any current leasehold  improvement costs
to  which  the  Tenant  has been  invoiced  and any  year  end  Additional  Rent
adjustments  with respect to that period of time up to and  including  March 30,
2001 for which the Tenant shall remain  liable.  The Tenant shall continue to be
liable to pay  Annual  Rent and  Additional  Rent with  respect to the 1st floor
premises to March 31, 2001 until released.


2.       BUILDING SIGNAGE

Provided the Tenant  itself  leases and  continually  occupies  Leased  Premises
comprising no less than Sixty Five Thousand Two Hundred Thirty One point Seventy
One  (65,231.71)  rentable square feet of space in year 1 of the Term and Eighty
Six Thousand  Nine Hundred  Seventy  Five point Sixty One  (86,975.61)  rentable
square feet in years 2-5 of the Term,  the Landlord  hereby grants to the Tenant
the  exclusive  right,  during the first five years of the Term,  subject to all
municipal  approvals and the Landlord's approval as to size, style and location,
to install at the Tenant's sole expense, a corporate  identification sign on the
exterior roof parapet of the Building.  So long as the Tenant leases  additional
space in the Building  within 5 years of the  Commencement  Date,  in the result
that it occupies in excess of  86,975.61  rentable  square feet,  the  exclusive
right shall be extended for a second five years of the Term.  If the Tenant does
not lease  additional  space and occupy Leased Premises  comprising in excess of
86,975.61  rentable  square feet by the end of the first five years of the Term,
the  exclusive  right  shall be  rendered  null and  void at the  option  of the
Landlord.

 During the Term of the  Lease,  the Tenant  shall,  subject to the above  noted
provision  and  Landlord's  satisfaction,  maintain  the sign at its expense and
shall  remove the sign at its expense at the  conclusion  of the Term and repair
any damage to the Building as a result of such  installation  and removal.  This
signage  right  is not  transferable,  is  personal  to  the  Tenant  and  shall
immediately  become null and void and the sign  removed  upon the Tenant  itself
leasing and/or occupying less than Forty Five Thousand  (45,000) rentable square
feet of space.



3.       RIGHT OF FIRST REFUSAL

Provided the Tenant  continuously  and promptly  pays the Annual and  Additional
Rent hereunder and fulfils its other  obligations  under the Lease, the Landlord
hereby agrees,  that if at any time or times during the Term, the Landlord is in
receipt of a bona fide offer to lease from a third  party  ("Offer")  for all or
part of any  vacant  space on the  ground  floor  and/or  for all or part of any
vacant  space  on the 1st and 6th  floor  located  in the  Building  ("Expansion
Premises"), provided the Tenant is not then in default under the Lease, prior to
accepting  such  Offer,  the  Landlord  shall then offer to lease the  Expansion
Premises to the Tenant by delivering  notice, in writing,  setting out the terms
and conditions of the Offer and the Tenant shall have the right within three (3)
days of its receipt of such notice, to deliver to the Landlord written notice of
its election to lease the Expansion  Premises upon the same terms and conditions
contained in the Offer.  The notice given by the Tenant to the  Landlord,  shall
constitute a binding  offer to lease and the  Landlord and Tenant shall  proceed
diligently  to enter  into a lease,  which  lease  shall  reflect  the terms and
conditions of the Offer and which lease shall  otherwise be the same form as the
Lease.  If the Tenant does not so elect,  the Landlord shall be free to, but not
obligated  to,  lease the  Expansion  Premises to the third party and this right
with respect to the Expansion  Premises  shall  continue to remain in full force
and effect for the remainder of the ground floor, if applicable.


4.       PYLON SIGNAGE

The  Landlord  acknowledges  that an exterior  pylon sign will be erected on the
lands for the purpose of corporate  identification by the tenants subject to the
Landlord's approval.




                         DATED the 9th day of May, 2000.






BETWEEN:

                        KANATA RESEARCH PARK CORPORATION

                                                               OF THE FIRST PART




AND:


                                 PMC-SIERRA LTD.

                                                              OF THE SECOND PART

                                    L E A S E




                        KANATA RESEARCH PARK CORPORATION
                                       and
                                 PMC-SIERRA LTD.





1.00 LEASED PREMISES...........................................................1
1.01 ADDITIONAL DEFINITIONS....................................................1
2.00 TERM......................................................................2
2.01 INABILITY TO GIVE OCCUPANCY...............................................2
2.02 EARLY OCCUPANCY...........................................................2
2.03 OVERHOLDING...............................................................2
3.00 RENT - Basic Rent.........................................................3
3.01 MONTHLY RENTAL............................................................3
3.02 ADDITIONAL RENT...........................................................3
3.03 ESTIMATED ADDITIONAL RENTALS..............................................3
3.04 DEFICIENCY OF ADDITIONAL RENT.............................................4
3.05 EXCESS OF ADDITIONAL RENTAL INSTALLMENTS..................................4
3.06 PRO-RATING OF ADDITIONAL RENT.............................................4
3.07 PREPAYMENT OF ADDITIONAL RENT.............................................4
3.08 DISPUTE AS TO AMOUNT OF ADDITIONAL RENT...................................4
3.09 POST-DATED CHEQUES........................................................4
3.10 ADVANCE RENTAL............................................................5
3.11 MANNER AND PLACE OF PAYMENT OF RENT.......................................5
3.12 DEFAULT...................................................................5
3.13 ACCRUAL OF RENT...........................................................5
3.14 NET LEASE.................................................................5
4.00 TENANT'S BUSINESS TAX;....................................................5
4.01 LANDLORD'S BUSINESS TAX;..................................................6
4.02 TAX ON TENANT'S LEASEHOLD IMPROVEMENTS;...................................6
4.03 PROPERTY TAX..............................................................6
4.04 ALLOCATION OF TAX.........................................................7
4.05 SEPARATE SCHOOL TAXES.....................................................7
4.06 TAX APPEAL................................................................7
4.07 CAPITAL TAX...............................................................7
5.00 OPERATING COSTS...........................................................7
5.01 ALLOCATION OF OPERATING COSTS.............................................8
5.02 FULL OCCUPANCY............................................................8
5.03 USE OF ELECTRICITY........................................................8
5.04 METERS....................................................................9
6.00 ASSIGNING OR SUBLETTING...................................................9
6.01 REQUEST TO ASSIGN OR SUBLET...............................................9
6.02 LANDLORD'S RIGHT TO CANCEL;...............................................9
6.03 ASSIGNMENT AGREEMENT.....................................................10
6.04 CONSENT NOT TO RELEASE TENANT............................................10
6.05 CHANGE IN CORPORATE CONTROL..............................................10
6.06 NOTICE OF CHANGE OF CONTROL..............................................10
6.07 COST OF CONSENT..........................................................10
7.00 TENANT'S COVENANTS;......................................................10
7.01 TENANT REPAIRS...........................................................11
7.02 RULES AND REGULATIONS....................................................11
7.03 USE OF PREMISES..........................................................11
7.04 INCREASE IN INSURANCE PREMIUMS...........................................11
7.05 CANCELLATION OF INSURANCE................................................12
7.06 OBSERVANCE OF LAW........................................................12
7.07 WASTE AND OVERLOADING OF FLOORS..........................................12
7.08 INSPECTION...............................................................12
7.09 INDEMNITY TO LANDLORD....................................................13
7.10 DAMAGE BY TENANT.........................................................13
7.11 TENANT INSURANCE.........................................................13
7.12 NO ABATEMENT OF RENT.....................................................14
7.13 EXHIBITING PREMISES......................................................14
7.14 SIGNS....................................................................15
7.15 NAME OF BUILDING.........................................................15
7.16 KEEP TIDY................................................................15
7.17 DELIVERIES...............................................................15
7.18 NOTICE OF DAMAGE.........................................................15
7.19 ALTERATIONS, ETC.........................................................15
7.20 CONSTRUCTION LIENS.......................................................16
7.21 SECURITY.................................................................16
7.22 HAZARDOUS SUBSTANCES.....................................................16
7.23  NUISANCE................................................................17
8.00 LANDLORD'S COVENANTS;....................................................17
8.01 QUIET ENJOYMENT..........................................................17
8.02 TAXES, ETC...............................................................17
8.03 HEATING AND AIR-CONDITIONING.............................................18
8.04 REPAIR OF STRUCTURE......................................................18
8.05 JANITORIAL SERVICES......................................................18
8.06 DELAYS IN PROVISION OF SERVICES..........................................18
9.00 TENANT'S FIXTURES;.......................................................19
9.01 REMOVAL OF TENANT'S FIXTURES;............................................19
10.00 DAMAGE OR DESTRUCTION OF LEASED PREMISES................................19
10.01 PARTIAL DAMAGE..........................................................19
10.02 TOTAL DAMAGE............................................................19
10.03 OBLIGATION TO REPAIR....................................................20
10.04 ABATEMENT OF RENT.......................................................20
10.05 DAMAGE TO 50% OF BUILDING...............................................20
10.06 COMPLETION OF REPAIR....................................................20
11.00 LIABILITY FOR DAMAGE TO PROPERTY........................................20
12.00 DEFAULT OF TENANT.......................................................21
13.00 BANKRUPTCY..............................................................21
14.00 RE-ENTRY BY LANDLORD....................................................22
15.00 RIGHT OF TERMINATION....................................................22
16.00 DISTRESS................................................................22
17.00 NON-WAIVER..............................................................22
18.00 CHANGES TO BUILDING.....................................................23
19.00 SEVERANCE OF LAND.......................................................23
20.00 COSTS OF COLLECTION.....................................................23
21.00 PROFITS AND REMEDIES BY LANDLORD........................................23
21.01 PAYMENTS TO THIRD PARTIES...............................................23
21.02 NON-PAYMENT OF ADDITIONAL RENT..........................................23
21.03 INTEREST ON ARREARS.....................................................24
22.00 NOTICE..................................................................24
23.00 SUBORDINATION, POSTPONEMENT, ATTORNMENT.................................24
23.01 TENANT'S RIGHT TO POSSESSION;...........................................25
23.02 ATTORNMENT BY TENANT....................................................25
24.00 CERTIFICATE.............................................................25
25.00 REGISTRATION............................................................25
26.00 PLANNING ACT............................................................25
27.00 TRANSFER BY LANDLORD....................................................25
28.00 NO ADVERTISING OF LEASED PREMISES.......................................26
29.00 TIME OF ESSENCE.........................................................26
30.00 LAWS OF ONTARIO.........................................................26
31.00 SEVERABILITY OF COVENANTS...............................................26
32.00 HEADINGS................................................................26
33.00 SCHEDULES...............................................................26
34.00 LEASE ENTIRE AGREEMENT..................................................26
35.00 INTERPRETATION..........................................................26
36.00 SUCCESSORS..............................................................27
37.00 JOINT AND SEVERAL COVENANT..............................................27
SCHEDULE "A...................................................................28
- -----------
SCHEDULE "B...................................................................29
- -----------
SCHEDULE "C"..................................................................30
- ------------
SCHEDULE "D"..................................................................33
- ------------
SCHEDULE "E"..................................................................34
- ------------
SCHEDULE "G"..................................................................35
- ------------
SCHEDULE "H"..................................................................36
- ------------