Document:

<PAGE>
                                                                   EXHIBIT 10.27

                                AMENDMENT # 2 TO
                     MAJOR ACCOUNT LICENSE AGREEMENT BETWEEN
                      GE MEDICAL SYSTEMS AND SELECTICA INC.

This Amendment #2 ("Amendment #2") to the Major Account License Agreement
between GE Medical Systems and Affiliates ("Customer") and Selectica Inc.
("SELECTICA") dated June 28, 2002 (the "Agreement"), is made as of the date of
signature by the last signing party (the "Effective Date") by and among Customer
and SELECTICA.

                                     RECITAL

On June 28,2002, Customer and SELECTICA entered into the Agreement by which
SELECTICA is to provide certain Software. The parties to the Agreement now wish
to amend the Agreement as follows by executing this Amendment #2.

                                    AGREEMENT

1.    Exhibit A, of the Agreement, shall be deleted in its entirety and replaced
      with the following:

                                    EXHIBIT A

                    DESCRIPTION OF SOFTWARE AND DOCUMENTATION

<TABLE>
<CAPTION>
                Licensed Product                  Licensed Users/Seats
                ----------------                  --------------------
<S>                                               <C>
         ACE Enterprise Professional Edition           Unlimited

         ACE Studio                                       500

         ACE Application Data Manager                  Unlimited

         ACE Mobile Professional Edition                 7500

         ACE Pricer                                    Unlimited

         ACE Enterprise Data Translator for            Unlimited
         Oracle (tool for converting bill
         of materials into knowledgebases)

         ACE Connectors to CrossWorlds                 Unlimited
         and Oracle

         ACE Repository                                Unlimited
</TABLE>

<PAGE>

2.    Exhibit B, Section 1, Paragraph 2 (Software License Table) of the
      Agreement, shall be deleted to its entirety and replaced with the
      following:

<TABLE>
<CAPTION>
            Licensed Product                Licensed Users/Seats   Additional Users/Seats
            ----------------                --------------------   ----------------------
<S>                                         <C>                    <C>

      ACE Enterprise Professional Edition        Unlimited                  N/A

      ACE Studio                                    500                $150 per seat

      ACE Application Data Manager               Unlimited                  N/A

      ACE Mobile Professional Edition               7500                $40 per user

      ACE Pricer                                 Unlimited                  N/A

      ACE Enterprise Data Translator for         Unlimited                  N/A
      Oracle (tool for converting bill
      of materials into knowledgebases)

      ACE Connectors to CrossWorlds              Unlimited                  N/A
      and Oracle

      ACE Repository                             Unlimited                  N/A

      ACE ADK                                    Unlimited                  N/A
</TABLE>

3.    Miscellaneous

All other terms and conditions of the Agreement, including exhibits and
schedules remain unchanged.

This Amendment #2 may be executed in any number of counterparts, each of which
shall be deemed an original, but all of which together shall constitute one
instrument.

In the event of any inconsistency between the terms of the Agreement and the
terms of this Amendment, this Amendment will prevail in all respects.

IN WITNESS WHEREOF, the parties have caused this Amendment #2 to the Agreement
to be duly signed and authorized.

GE Medical Systems                            SELECTICA, INC.
(CUSTOMER)                                    (SELECTICA)

By: /s/ Gloria Lewis                          By: /s/ Stephen Bennion
    -----------------------------                 -----------------------------

Name: Gloria Lewis                            Name: Stephen Bennion
      ---------------------------                   ---------------------------

Title: Global Sourcing Leader                 Title: CFO
       --------------------------                    --------------------------

Address:                                      Address:
         ------------------------                      ------------------------

---------------------------------             ---------------------------------

Date: 10/08/02                                Date: 10/08/02
      ---------------------------                   ---------------------------<PAGE>
                                                                   EXHIBIT 10.28

                                AMENDMENT # 3 TO
                     MAJOR ACCOUNT LICENSE AGREEMENT BETWEEN
                      GE MEDICAL SYSTEMS AND SELECTICA INC.

This Amendment #3 ("Amendment #3") to the Major Account License Agreement
between GE Medical Systems and Affiliates ("Customer") and Selectica Inc.
("SELECTICA") dated June 28, 2002 (the "Agreement"), is made as of the date of
signature by the last signing party (the "Effective Date") by and among Customer
and SELECTICA.

                                     RECITAL

On June 28, 2002, Customer and SELECTICA entered into the Agreement by which
SELECTICA is to provide certain Services. The parties to the Agreement now wish
to amend the Agreement as follows by executing this Amendment #3.

                                    AGREEMENT

1.    Exhibit B, Section 3, Paragraph 3 (Payment Schedule Table) of the
      Agreement, shall be deleted in its entirety and replaced with the
      following:

<TABLE>
<CAPTION>
                    Payment Date                        Amount of Payment
                    ------------                        -----------------
<S>                                                     <C>
       Acceptance of Deliverable at Milestone 1            $ 2,760,000
       (estimated September 30, 2002)

       Acceptance of Deliverable at Milestone 2            $ 2,760,000
       (estimated December 31, 2002)

       "Gold Code" for Field Release R1+                   $ 1,693,000
       (estimated March 31, 2003)

       "Gold Code" for Field Release R2+                   $ 1,219,000
       (estimated June 30, 2003)

       "Gold Code" for Field Release R3+                   $ 1,105,000
       (estimated September 30, 2003)

       "Gold Code" for Field Release R4+                   $ 1,105,000
       (estimated December 31, 2003)

       Field Deployment of R4+ to GEMS Core                $ 1,579,000
       (estimated February 15, 2004)

       Field Deployment (50%) of R4+ to GEMS Core          $ 1,579,000
       (estimated March 31, 2004)

        TOTAL                                              $13,800,000
</TABLE>

      Customer agrees to issue the purchase orders approximately forty-five(45)
days prior to the acceptance date. Selectica shall invoice to the Customer
approximately thirty (30) days

<PAGE>

prior to the acceptance date and cash payments shall be made once acceptance has
been received.

2.    Miscellaneous

All other terms and conditions of the Agreement, including exhibits and
schedules remain unchanged.

This Amendment #3 may be executed in any number of counterparts, each of which
shall be deemed an original, but all of which together shall constitute one
instrument.

In the event of any inconsistency between the terms of the Agreement and the
terms of this Amendment, this Amendment will prevail in all respects.

This Amendment #3, prior Amendments #1 and #2, and the Major Account License
Agreement constitute the entire agreement, and supercedes any and all prior
agreements between SELECTICA and Customer relating to the Software,
Documentation, services and other items subject to this Agreement.

IN WITNESS WHEREOF, the parties have caused this Amendment #3 to the Agreement
to be duly signed and authorized.

GE Medical Systems                         SELECTICA, INC.
(CUSTOMER)                                 (SELECTICA)

By:    /s/ RONALD J. MAUER                 By:    /s/ Stephen Bennion
    ----------------------------               ----------------------------
Name:  RONALD J. MAUER                     Name:  Stephen Bennion
      --------------------------                 --------------------------
Title: SOURCING LEADER                     Title: CFO
       -------------------------                  -------------------------
Address:                                   Address:
         -----------------------                    -----------------------

--------------------------------           --------------------------------
Date:  28 - Mar 03                         Date:  3-31-03
      --------------------------                 --------------------------<PAGE>
                                                                   EXHIBIT 10.29

                   ADDENDUM TO PROFESSIONAL SERVICES AGREEMENT

      This Addendum to the foregoing Professional Services Agreement, dated June
28th, 2002, (the "Agreement") is hereby made and entered into this 27th day of
August, 2002 by and between General Electric Company, acting through and on
behalf of its GE Medical Systems business, ("Customer") and Selectica, Inc., a
Delaware corporation with principal offices located at 3 West Plumeria Drive,
San Jose, CA 94134 ("Selectica") (as those terms are defined in the Agreement).

      Notwithstanding anything in the Agreement to the contrary, the Agreement
is hereby amended and/or supplemented as hereinafter set forth:

      1.    Delete the first paragraph of the Agreement in its entirety and
replace as follows:

      "This Professional Services Agreement ("Agreement") is entered into by and
      between General Electric Company, acting through and on behalf of its GE
      Medical Systems business, ("Customer") and Selectica, Inc., a Delaware
      corporation with principal offices located at 3 West Plumeria Drive, San
      Jose, CA 95134 ("Selectica") is effective on the date it is signed by both
      parties ("Effective Date")."

      2.    Schedule A FEES FOR PROFESSIONAL SERVICES. TERM. Insert a new
subsection 2. Expenses, (v) through (vii) as follows:

      "(v) Temporary Housing: GEMS shall reimburse Selectica for the rental of
      apartment totaling 10 but no more than 15. Said cost not to exceed
      $1,335.00, per apartment, and not without prior written approval for GEMS.
      Selectica shall sign all leases for housing and accepts all liability for
      damages.

      (vi) Car Lease: GEMS shall reimburse Selectica for the lease rental of
      vehicles not to exceed 14. Said cost not to exceed $640.00, per vehicle,
      and not without prior written approval from GEMS. Selectica shall sign all
      leases and insurance for car rental and accepts all liability for damages.

      (vii) Termination/Extension: If project terminates early GEMS agrees to
      pay the remainder of the leases, or if project goes longer than expected,
      upon GEMS prior written approval, GEMS will reimburse Selectica for the
      additional expenses incurred with this extension.

      (viii) Round-Trip Visits: GEMS shall allow a specific number of airline
      round-trip visits to San Jose, California for the below referenced
      positions. Said number of visits shall not be exceeded without GEMS prior
      written consent."

<PAGE>

      (viii)

<TABLE>
<CAPTION>
            TITLE                         ROUND-TRIP VISITS TO CALIFORNIA
            -----                         -------------------------------
<S>                                       <C>
            Engagement Manager                          42
            Chief Program Manager                       22
            Solution Architect                          22
            Track lead (1)                              22
            Track lead                                   9
            Track lead                                   9
            Track lead                                   9
            Consultant                                   3
            Consultant                                   3
            Consultant                                   3
            Consultant                                   3
            Consultant                                   3
</TABLE>

      3.    Effect of Addendum. Except, as hereinabove specifically set forth,
the Agreement is not otherwise herein amended. In the event of a conflict
between the terms and conditions of this Addendum and those contained within the
Agreement, the terms and conditions of this Addendum shall prevail.

      THIS ADDENDUM, INCLUDING THE AGREEMENT OF WHICH IT IS A PART, IS A
COMPLETE AND EXCLUSIVE STATEMENT OF THE AGREEMENT BETWEEN THE PARTIES, WHICH
SUPERSEDES ALL PRIOR OR CONCURRENT PROPOSALS AND UNDERSTANDINGS, WHETHER ORAL OR
WRITTEN, AND ALL OTHER COMMUNICATIONS BETWEEN THE PARTIES RELATING TO THE
SUBJECT MATTER OF THIS ADDENDUM AND THE AGREEMENT.

In Witness Whereof, the undersigned have executed this Addendum to Professional
Services Agreement as of the date first written above.

SELECTICA, INC.,                       GENERAL ELECTRIC COMPANY,
                                       ACTING THROUGH AND ON BEHALF OF ITS
                                       GE MEDICAL SYSTEMS BUSINESS

By: /s/ Stephen Bennion                By: /s/ Sheila Schlines
    -----------------------------          ---------------------------------
    (Authorized Signature)                 (Authorized Signature)

    Stephen Bennion (CFO)                  Sheila Schlines
    -----------------------------          ---------------------------------
    (Printed Name and Title)               (Printed Name and Title)

    8/27/02                                8/27/02
    -----------------------------          ---------------------------------
    (Date)                                 (Date)

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