Document:

Exhibit 10.1(a)

                                  AMENDMENT #1

                   TO LEASE DATED July 12, 1996 BY AND BETWEEN
          Equitable Holdings, Inc. (a Minnesota corporation), AS LESSOR
           AND Inter-Con-PC Inc. (a Minnesota corporation), AS LESSEE

         THIS AMENDMENT TO LEASE, entered into and made of the 4th day of
September 1996, by and between Equitable Holdings, Inc. (a Minnesota
corporation), as Lessor and Inter-Con-PC, Inc. (a Minnesota corporation), as
Lessee.

                                   WITNESSETH:

         WHEREAS, Lessor and Lessee have heretofore entered into a certain
lease, dated July 12, 1996 (the "Lease"), of a certain space at Bay 101, 7667
equitable Drive, Eden Prairie, Minnesota (the "Premises"), upon terms and
conditions described in said Lease; and

         WHEREAS, Lessor and Lessee desire to amend said lease as described
below:

         NOW THEREFORE, in consideration of the rents reserved and of the
covenants and agreements herein set forth, it is agreed that the Lease be hereby
amended from and after the date hereof as follows:

1.       The demised Premises shall be expanded to include an additional 100
         square feet of office space commencing retroactive as of August 15,
         1996. Said additional space shall expand Demised Premises to a total of
         2,441 square feet as shown on the floor plan attached hereto as Exhibit
         "E."

2.       Base Rent as defined in Article 42 of the Lease shall be deleted in its
         entirety and replaced with:

<TABLE>
<CAPTION>
         Period                                            Monthly Base Rent              Total Period Base Rent
         ------                                            -----------------              ----------------------
<S>                                                            <C>                               <C>
         August 15, 1996, through and including
         August 31, 1996                                       $1,004.02                         $1,004.02

         September 1, 1996, through and
         including August 31, 1999                             $1,830.75                        $65,907.00

         September 1, 1999, through and
         including August 31, 2001                             $1,922.30                        $46,135.20
</TABLE>

3.       Lessee's prorata share of Additional Rent, Article 3 of the Lease,
         shall be 10.48% commencing retroactively as of August 15, 1996.

         Except as is hereinabove set forth, all other terms, provisions and
covenants of the Lease shall remain unchanged and in full force and effect.

         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the day and year first above written.

                                        1

<PAGE>

LESSEE:                                         LESSOR:

Inter-Con-PC, Inc.                              Equitable Holdings, Inc.
(a Minnesota corporation)                       (a Minnesota corporation)

By:      /s/ Michael P. Ferderer                By:      /s/ Joseph F. Novogratz
         -------------------------------------           -----------------------
         Michael P. Ferderer                             Joseph F. Novogratz
Its:     President and Chief Executive Officer  Its:     President
         -------------------------------------           -----------------------

                                        2Exhibit 10.1(b)

                              AMENDMENT #2 TO LEASE

         AGREEMENT, made as of November 5, 1996, between Equitable Holdings,
Inc. ("Lessor") and Inter- Con/PC, Inc. ("Lessee").

         A. Lessor and Lessee entered into a written Lease dated July 12, 1996
("Lease") relating to the premises ("Premises") currently consisting of
approximately 2,441 square feet in the building commonly known as 7667 Equitable
Drive, Eden Prairie, Minnesota (the "Building").

         B. The Lease has not previously been amended or modified except by
Amendment #1 dated September 4, 1996 ("Amendment #1"), which Amendment shall be
deemed included in the term "Lease."

         C. Whereas, effective as of the date hereof, Lessee has issued to
lessor 66,667 shares of the Lessee's Common Stock (the "Shares") and a warrant
(the "Warrant") to purchase 25,000 shares of the Company's Common Stock which
Lessor has agreed to accept as payment in full of all rent accruing under the
Lease for the thirty-three (33) month period commencing September 1, 1996 and
charges for leasehold improvements to the Premises.

         D. Lessor and Lessee desire to amend the Lease as provided in this
Amendment.

         FOR VALUABLE CONSIDERATION, the receipt and sufficiency of which are
expressly acknowledged, Lessor and Lessee agree as follows:

         1. Effect. The Lease is hereby amended to the extent necessary to give
effect to this Amendment, and the terms of this Amendment shall supersede any
contrary terms in the Lease. All references in the Lease to "this Lease" shall
be deemed to refer to the Lease as amended by this Amendment. In all other
respects, the terms and conditions of the Lease shall remain unmodified and in
effect.

         2. Term. The parties acknowledge that the Premises was not delivered to
Lessee for occupancy until September 1, 1996, and therefore, the Lease is hereby
amended to provide that the term of the Lease shall be sixty (60) months
commencing September 1, 1996 (the "Commencement Date"), and expiring August 31,
2001 ("Expiration Date") unless sooner terminated as provided in the Lease. All
references in the Lease to rental or other charges accruing for any period prior
to September 1, 1996, are hereby entirely deleted.

         3. Substitute Rent. Lessor hereby accepts the Shares and Warrant as
substitute payment in full of Lessee's obligation to pay Base Rent and
Additional Rent (as such terms are defined in the Lease) for the period
commencing on September 1, 1996, and ending on May 31, 1999 and Lessee's
obligation to pay or reimburse Lessor for any leasehold improvements constructed
in the Premises prior to the date hereof. All such obligations referred to in
the preceding sentence are hereinafter referred to as the "Initial Rent and TI
Obligations". Notwithstanding anything to the contrary contained in the Lease,
Lessee shall have no further obligation to pay any monthly or other payments of
Base Rent, Additional Rent for the thirty-three (33) month period ending May 31,
1999, or for any costs of improvements to the Premises previously constructed by
or on behalf of the Lessor. Lessor agrees and acknowledges that the value of the
Initial Rent and TI Obligations is $100,000.00. All Base Rent and Additional
Rent for the period from June 1, 1999, though the remainder of the Lease term
shall accrue and be paid in accordance with the Lease as currently written.

         4. Entire Agreement. The Lease, including, without limitation, this
Amendment and all exhibits which are attached hereto and hereby incorporated by
reference, constitutes the entire agreement between Lessor and Lessee with
respect to the subject matter hereof. Lessee and Lessor each acknowledge that it
has not been induced to enter into this Amendment by any agreements or
representations which are not set forth in this Amendment. This Amendment shall
not be effective until execution and delivery by both Lessor and Lessee.

                                        1

<PAGE>

         By signing this Amendment, the parties agree to the above terms.

Lessor:                                        Lessee:

EQUITABLE HOLDINGS, INC.                       INTER-CON/PC, INC.

By   /s/ Joseph Novogratz                      By  /s/ Michael P. Ferderer
  ---------------------------------------        -------------------------
     Name: Joseph Novogratz                        Name: Michael P. Ferderer
          -------------------------------               --------------------
     Title: President                              Title: CEO
           ------------------------------                -------------------

                                        2Exhibit 10.1(c)

                                  AMENDMENT #3

         TO LEASE DATED July 12, 1996 BY AND BETWEEN Equitable Holdings, Inc.,
AS LESSOR AND Inter- Con/PC, Inc., AS LESSEE.

         THIS AMENDMENT TO LEASE, entered into and made as of the 25th day of
August, 1998, by and between Equitable Holdings, Inc., as Lessor and
Inter-Con/PC, Inc., as Lessee.

                                   WITNESSETH:

         WHEREAS, Lessor and Lessee have heretofore entered into a certain
lease, dated July 12, 1996, which was amended September 4, 1996 and further
amended November 5, 1996 (the "Lease"), of a certain space at 7667 Equitable
Drive, Eden Prairie, MN (the "Premises"), upon terms and conditions described in
such Lease; and

         WHEREAS, Lessor and Lessee desire to amend said lease as described
below:

         NOW THEREFORE, in consideration of the rents reserved and of the
covenants and agreements herein set forth, it is agreed that the Lease be hereby
amended from and after the date hereof as follows:

1.       "Demised Premises". That certain portion of the Building located at
         7667 Equitable Drive and designated as Bay A consisting of
         approximately 2,441 square feet as shown on Exhibit A which shall be
         expanded to include Bay B consisting of approximately 1,021 square feet
         as shown on Exhibit B, and Bay C consisting of approximately 1,732
         square feet as shown on Exhibit C, attached hereto and made a part
         hereof for a total of 5,194 square feet.

2.       "Term". The term of this agreement shall be amended to extend the term
         of the original lease through September 30, 2002. The commencement date
         of the term for Bay B shall be February 1, 1998, and for Bay C shall be
         October 1, 1997 and will be coterminous through September 30, 2002.

3.       "Base Rent". The Base Rent for the entire Leased Premises shall be as
         follows:

<TABLE>
<CAPTION>
                                           Period                                        Base Rent Per Month
         ---------------------------------------------------------------------------     -----------------------------
<S>                                                                                                <C>
         October 1, 1997 through and including January 31, 1998                                    $1,335.00
         February 1, 1998 through and including May 31, 1999                                       $2,122.10
         June 1, 1999 through and including August 31, 1999                                        $3,952.85
         September 1, 1999 through and including September 30, 2002                                $4,044.39
</TABLE>

4.       Prorata Share: The Lessor agrees, as a condition of this Lease, that
         for the period of October 1, 1997 through and including January 31,
         1998 shall be 7.44%. Beginning February 1, 1998 through and including
         May 31, 1999, the Lessee's prorata share of Additional Rent shall be
         11.82%. Beginning June 1, 1999 and continuing until the expiration of
         this Lease, the Lessee's prorata share shall increase to 22.31%.

         Except as is hereinabove set forth, all other terms, provisions and
covenants of the Lease shall remain unchanged and in full force and effect.

         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the day and year first above

                                        1

<PAGE>

written.

LESSEE:                                        LESSOR:

Inter-Con/PC, Inc.                             Equitable Holdings, Inc.

By:       /s/ Michael P. Ferderer              By:       /s/ Joseph F. Novogratz
         -------------------------------                ------------------------
         Mike Ferderer                                  Joseph Novogratz

Its:     President and CEO                     Its:     President
         -------------------------------                ------------------------

                                        2

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