Document:

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                                                                  EXHIBIT 10.100

July 25, 2002

Dear John:

This letter confirms our agreement around the changes in your employment with
Sun Microsystems, Inc. For ease of reference, this letter will be referred to
here and in other documents as the "Employment Agreement."

1.  Beginning July 1, 2002, you will move out of your current role as Executive
    Vice President of Computer Systems, but will remain at your current salary,
    with a Sun Bonus Plan target of 200% of your base salary. This will make you
    eligible for a bonus payout of between 0 and 400% depending upon the results
    of the plan. You will continue to provide services to Sun such as
    participating in Sun's Leadership Institute, leading or participating in Sun
    customer visits, consulting to internal Sun organizations, and other
    assignments as deemed necessary and appropriate by Sun's Chairman and CEO.
    As a practical matter your liaison for administrative issues such as work
    balance and recording, travel expense reports, etc., will be Steve McGowan.

2.  On or around June 30, 2003 you will be paid a gross cash bonus of
    $1,000,000, less applicable deductions.

3.  Beginning July 1, 2003, you will move to part time status with a
    corresponding reduction in your salary to fifty percent of your current base
    salary. You will continue to provide services to Sun such as participating
    in Sun's Leadership Institute, leading or participating in Sun customer
    visits, consulting to internal Sun organizations, and other assignments as
    deemed necessary and appropriate by Sun's Chairman and CEO.

4.  Beginning July 1, 2003, you hereby waive participation in any Sun Bonus
    Plan.

5.  For the period from July 1, 2002 through June 30, 2004 you will continue to
    receive coverage under Sun's flexible benefits policies.

6.  On June 30, 2004, you will retire from Sun and will be eligible for the
    benefits outlined in the attached document, "When you Retire from Sun."

7.  You will be subject to the Employee Proprietary Information Agreement you
    signed at hire, as well as the policies applicable to employees generally,
    including Sun's Standards of Business Conduct. Both the Employee Proprietary
    Information Agreement and the Standards of Business Conduct prohibit
    employees from engaging in other employment which constitutes a conflict of
    interest with their employment at the Company. To avoid such a conflict, in
    the event you desire to work elsewhere in any capacity prior to your
    termination date, whether as an employee, contractor or consultant, you must
    notify me and obtain my written consent in advance of commencement of any
    such work. Any such outside work, if

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    approved, can be for no more than half-time status. Should you commence such
    outside work without advance disclosure and my consent, or if you perform
    such outside work on more than half-time status, you will be considered as
    having voluntarily terminated your employment effective on the date such
    work commences. In such case this agreement will be null and void as of such
    date and Sun will have no obligation to provide or allow the things
    mentioned in this agreement. Upon termination you will have 90 days to
    exercise any vested options.

8.  Should Sun decide to terminate your employment prior to June 30, 2004, you
    will still be entitled to the compensation and benefits stated herein.

9.  The terms set forth in this letter constitutes the entire agreement and
    supersedes all prior agreements and understandings, both written and oral,
    among the parties with respect to the subject matter hereof.

10. To receive the benefits stated in this Transition Agreement, please confirm
    your receipt of this document by signing below, and by signing and returning
    the attached Release and Waiver within 45 days.

Do not hesitate to contact me with any questions.

Sincerely,

/s/ Crawford Beveridge
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Crawford Beveridge
Executive Vice President, People and Places, and
Chief Human Resources Officer

I agree with the above terms:

/s/ John C. Shoemaker
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John Shoemaker<PAGE>

                                                                  EXHIBIT 10.101

January 3, 2001

David Yen
Vice President, Integrated Products Group
Systems Products, Sun Microsystems

Dear David,

I am pleased to offer you the position of Vice President, Processor Products
Group effective January 2, 2001. This represents a promotion to grade E-18,
which is the most senior level of Vice President at Sun below the EMG that is in
active use. Our intent is to recognize this via a new job title as soon as we
receive approval from Sun's Board of Directors. You will report directly to me.

In recognition of your expanded responsibilities, your base salary will be
increased to $335,000. The bonus target for this position is 45%; targets are
being reviewed for FY02 and could be increased.

Additionally, you will be granted non-qualified Sun Stock Options covering
250,000 shares which will vest at 20% per year with vesting commencing one year
from the grant date. The options will be fully vested in five years and expire
in 8 years. You will also be granted 20,000 shares of Restricted Stock which
will become 50% vested two and one half years following the grant date; the
remaining 50% will vest five years from grant. Subject to approval by Sun's
Board of Directors, the grant date for the Stock Options and Restricted Stock is
December 13, 2000.

In the event you are involuntary terminated for reasons other than cause, or are
removed from this position either involuntarily for reasons other than cause or
due to deteriorating health conditions which cause you to become disabled and
prevent you from continuing full time in this position, and so elect, you will
be eligible to receive a severance agreement which will provide for, subject to
certain conditions, 1 year of employment continuation. This will include
continuation of your base salary at the then current rate, benefits
continuation, and normal vesting of stock options for this period.

                             PERSONAL & CONFIDENTIAL

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In addition, you are covered by the Sun Microsystems Vice President's Change of
Control Severance Plan, which provides for -- among other benefits -- vesting of
all outstanding options upon a termination which occurs as a result of a change
of control, subject to certain conditions. The complete text of the plan is
attached (reprinted from the Company's website).

David, your contributions are absolutely critical to Sun's ongoing success. I
look forward to working with you in your critical new role.

Regards,

/s/ John Shoemaker
----------------------------
John Shoemaker
Executive Vice President
Systems Products

Copies:

Crawford Beveridge
Scott McNealy
Ed Zander

                             PERSONAL & CONFIDENTIAL

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May 17, 2001

David Yen
Vice President, Processor Products Group
Computer Systems

Dear David,

Your contributions to the Computer Systems organization and Sun Microsystems
continue to be absolutely critical to our success. I want recognize your value
to this organization by enhancing certain elements of your compensation package.

Your SMI Vice President bonus target for fiscal years 2002 through 2004 will be
increased to 100% of your eligible wages and will be subject to the standard
bonus payout formula with a maximum payout of 200%. This replaces your current
45% bonus opportunity.

Additionally, providing you remain actively employed by Sun on May 17, 2004, you
will receive a gross cash bonus of $500,000 on that date.

Finally, you will be granted non-qualified Sun Stock Options covering 250,000
shares which will vest at 33% per year with vesting commencing one year from the
grant date. The options will be fully vested in three years and expire in 8
years. The grant will be submitted for approval by Sun's Board of Directors at
their June meeting.

I look forward to working with you to meet our challenges and achieve our
objectives -- you are clearly a key part of making this happen for Sun.

Regards,

/s/ John Shoemaker
-------------------------

John Shoemaker
Executive Vice President
Computer Systems

                             PERSONAL & CONFIDENTIAL<PAGE>
                                                                  EXHIBIT 10.102

September 5, 2002

Patricia Sueltz
Executive Vice President, Sun Services
Sun Microsystems

Dear Pat,

Congratulations on a great Fiscal 2002 and on your new role with Sun. Your
contributions to Sun Microsystems and leadership of the Sun Services
organization are absolutely critical to our success, and we want to recognize
your value to this organization in a meaningful way.

In addition to your FY02 bonus, you are being awarded an extraordinary bonus of
$380,000 (gross). This special bonus recognizes your outstanding performance in
preparing the Software organization for the change in leadership and smoothly
assuming your new role leading Sun Services. In addition, this is intended to
serve as a tangible indicator of our desire to retain you as a key member of
Sun's senior leadership team.

$190,000 will be paid to you as soon as practicable. The remaining $190,000 will
be paid to you on October 3, 2003 provided you do not voluntarily terminate your
employment with Sun and you are not terminated for cause prior to that date.

This letter supercedes any previous letters on this subject matter.

Pat, I look forward to working with you during FY03 and beyond to meet our
challenges and achieve our objectives.

Regards,

/s/ Scott G. McNealy
----------------------------------------
Scott G. McNealy
Chairman, CEO and President
Sun Microsystems

                             PERSONAL & CONFIDENTIAL

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