Exhibit 10.6

[JavaSoft letterhead]

March 9, 1998

Mr. John BaileyR&D Product ManagerBorland International, Inc. 100
Borland Way Scotts Valley, CA 95066-3249

Re:    Authorization to Integrate, Include, and Distribute Sun's
JavaCheck Technology

Dear Mr. Bailey:

It is our understanding that Borland International, Inc. desires
to integrate and/or include the JavaCheck technology with your Java
development tools suite Product, as that term is used in the Technology License
and Distribution Agreement (TLDA) by and between Sun Microsystems,
Inc. (Sun) and Borland International, Inc., and then to distribute
the Product for commercial and/or evaluation purposes. We also recognize that
Borland International, Inc. may need access to the JavaCheck source code for
integration and support purposes. Accordingly, subject to Borland International,
Inc.s acceptance of the terms and conditions set forth in this letter, as
evidenced by your countersignature in the space provided below, Sun is willing
to grant Borland International, Inc. a nonexclusive license to the JavaCheck
technology described in Exhibit A. Except as expressly set forth below, the
JavaCheck technology is licensed to Borland Internationa1, Inc. as additional
Technology as that term is used in the TLDA and is subject to the
terms and conditions of the TLDA:

|1) |  | JavaCheck technology is to be integrated and/or included only with Java
          development tool environment Products, and may not be redistributed as a stand
          alone Product.
|-- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|2) |  | Borland
International, Inc. and customers of Borland International, Inc. may only use the
JavaCheck technology in conjunction with the files located in the JavaCheck/specs/*
directory identified in Exhibit A ("SpecFiles") as provided by Sun at the time that Sun
makes the JavaCheck technology available to Borland International, Inc. Other than those
SpecFiles provided by Sun hereunder in Exhibit A, or any additional SpecFiles Sun makes
available to Borland International, Inc., Borland International, Inc. may not include
additional SpecFiles with Products without prior written permission by Sun.
|-- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|3) |  | No
files other than those explicitly named in Exhibit A may be modified by Borland
International, Inc. without prior written approval by Sun.
|-- |  | ---------------------------------------------------------------------------------------------------------------------------------------------

|4) |  | Sun
is under no obligation to provide any maintenance or support services for the JavaCheck
technology.
|-- |  | -------------------------------------------------------------------------------------------------------

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|5) |  | If
Borland International, Inc. uses the source files of the JavaCheck technology to
integrate the JavaCheck technology into the Product, then Borland International, Inc.
shall display the following notice in the Product's online documentation:
|-- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | Integrates
     Suns JavaCheck technology and supports Suns PersonalJava
     technology.
| | -----------------------------------------------------------------------------------------------

|6) |  | Instead,
if Borland International, Inc. packages the binary files of the JavaCheck technology with
the Product, then Borland International, Inc. shall display the following notice in the
Product's online documentation:
|-- |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | "Includes
Sun's JavaCheck Development Tool and supports Sun's PersonalJava technology."
| | -----------------------------------------------------------------------------------------

|7) |  | Sun provides the source files and the binary files, and the associated
          redistribution rights free of charge.
|-- |  | ----------------------------------------------------------------------------------------------------------------------

|8) |  | As
a courtesy, Borland International, Inc. agrees to deliver six copies of the Product to
Sun Microsystems, Inc. upon general distribution thereof.
|-- |  | ---------------------------------------------------------------------------------------------------------------------------------------------------

|9) |  | All
customary locations will contain the following copyright notice:
|-- |  | --------------------------------------------------------------------

| | Copyright
1998 Sun Microsystems. Inc., 901 San Antonio Road, Palo Alto, CA 94303-4900 USA, All
rights reserved. Java, JDK, JavaCheck and other Java related marks are trademarks or
registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | Restricted
     Rights: Use, duplication or disclosure by the United States government is
     subject to the restrictions as set forth in the Rights in Technical Data and
     Computer Software Clauses in DFARS 252.227-7013(c) (l) (ii) and FAR 52.227-19(c)
     (2) as applicable.
| | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

This authorization shall not become effective until Borland
International, Inc. acknowledges acceptance of the above terms and conditions by
signing this letter in the space provided below and returning the complete
document, including exhibits, to Jonathan Berents attention via fax at 408
343 1483, or at the following address:

| | Sun
Microsystems Inc./JavaSoft901 San Antonio Road Mailstop: CUP01-102 Palo Alto, CA
94303-4900 Attn: Jonathan Berent
| | ---------------------------------------------------------------------------------------------------------------------

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Very truly yours,

/s/ Curtis Sasaki

Curtis Sasaki Group Manager Sun Microsystems, Inc.

Enclosures: as stated

cc: Jonathan Berent

Agreed:

/s/ Michael Gardner
  Signature

Development Director
  Title

3/20/98
  Date

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Exhibit A

The following files may be modified:

JavaCheck/

| | src/
| | ----

| | JavaCheckV.java
| | ---------------

| | views/*
| | -------

| | widgets/*
| | ---------

| | resources/ClintRes.java
| | -----------------------

| | bin/*
| | -----

| | images/*
| | --------

| | docs/*
| | ------

The following files may not be modified:

JavaCheck/

| | src/
| | ----

| | JavaCheck.java
| | --------------

| | SpecGen.Java
| | ------------

| | ClassInfo/*
| | -----------

| | clint/*
| | -------

| | resources/*
(other than ClintRes.java)
| | --------------------------------------

| | specreader/*
| | ------------

| | specs/*
| | -------

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