Document:

Exhibit 10.1

                            ASSIGNMENT AND ASSUMPTION

                  This Assignment and Assumption (the "Assignment and
Assumption") is dated as of the Effective Date set forth below and is entered
into by and between Citizens Bank of Rhode Island (the "Assignor") and Bank of
America, N.A. (the "Assignee"). Capitalized terms used but not defined herein
shall have the meanings given to them in the Revolving Credit Agreement
identified below (as amended, the "Credit Agreement"), receipt of a copy of
which is hereby acknowledged by the Assignee. The Standard Terms and Conditions
set forth in Annex 1 attached hereto are hereby agreed to and incorporated
herein by reference and made a part of this Assignment and Assumption as if set
forth herein in full.

                  For an agreed consideration, the Assignor hereby irrevocably
sells and assigns to the Assignee, and the Assignee hereby irrevocably purchases
and assumes from the Assignor, subject to and in accordance with the Standard
Terms and Conditions and the Credit Agreement, as of the Effective Date inserted
by the Administrative Agent as contemplated below (i) all of the Assignor's
rights and obligations in its capacity as a Lender under the Credit Agreement
and any other documents or instruments delivered pursuant thereto to the extent
related to the amount and percentage interest identified below of all of such
outstanding rights and obligations of the Assignor under the respective
facilities identified below (including without limitation any letters of credit,
guarantees, and swingline loans included in such facilities) and (ii) to the
extent permitted to be assigned under applicable law, all claims, suits, causes
of action and any other right of the Assignor (in its capacity as a Lender)
against any Person, whether known or unknown, arising under or in connection
with the Credit Agreement, any other documents or instruments delivered pursuant
thereto or the loan transactions governed thereby or in any way based on or
related to any of the foregoing, including, but not limited to, contract claims,
tort claims, malpractice claims, statutory claims and all other claims at law or
in equity related to the rights and obligations sold and assigned pursuant to
clause (i) above (the rights and obligations sold and assigned pursuant to
clauses (i) and (ii) above being referred to herein collectively as, the
"Assigned Interest"). Such sale and assignment is without recourse to the
Assignor and, except as expressly provided in this Assignment and Assumption,
without representation or warranty by the Assignor.

1.       Assignor:                  Citizens Bank of Rhode Island

2.       Assignee:                  Bank of America, N.A.

3.       Borrower(s):               Realty Income Corporation

4.       Administrative Agent:      The Bank of New York, as the administrative
                                    agent under the Credit Agreement

5.       Credit Agreement:          The $200,000,000 Revolving Credit Agreement
                                    dated as of December 14, 1999, as amended,
                                    among Realty Income Corporation, the Lenders
                                    parties thereto, The Bank of New York as
                                    Administrative Agent and as Swing Line Bank,
                                    and the other agents parties thereto

6.        Assigned Interest:
<TABLE>

----------------------------------------------------------------------------------------------------------------------
<S>                              <C>                          <C>                            <C>
      Facility Assigned            Aggregate Amount of        Amount of Commitment/Loans     Percentage Assigned of
                                 Commitment/Loans for all              Assigned                 Commitment/Loans
                                         Lenders
----------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------
Revolving Credit Commitment    $200,000,000                  $20,000,000                            10.0000  %
----------------------------------------------------------------------------------------------------------------------
</TABLE>

7. Extension of Termination Date: Subject to the prior agreement of all the
Banks, excluding Assignor, to extend their scheduled Termination Dates to
December 30, 2003 pursuant to Section 11.12 of the Credit Agreement, Assignee
agrees to the extension of its scheduled Termination Date to December 30, 2003
pursuant to Section 11.12 of the Credit Agreement.

                                       1
<PAGE>

Effective Date:  March 15, 2002 [TO BE INSERTED BY ADMINISTRATIVE AGENT AND
WHICH SHALL BE THE EFFECTIVE DATE OF RECORDATION OF TRANSFER IN THE REGISTER
THEREFOR.]

The terms set forth in this Assignment and Assumption are hereby agreed to:

                                         ASSIGNOR: CITIZENS BANK OF RHODE ISLAND

                                           By:         /s/ Craig E. Schermerhorn
                                                     Name: Craig E. Schermerhorn
                                                        Title:   Vice President

                                                 ASSIGNEE: BANK OF AMERICA, N.A.

                                                   By:         /s/ Renee Sampson
                                                             Name: Renee Sampson
                                                         Title:   Vice President

In consideration of the preparation of this Assignment and Assumption by
Assignor and Assignee, the Administrative Agent hereby waives its $3,500
administrative fee, and further consents to and accepts this Assignment and
Assumption:

THE BANK OF NEW YORK, as
Administrative Agent and as Swing Line Bank
By:  BNY Capital Markets, Inc., as agent

By:               /s/ Janet L. Wolff
       Name:      Janet L. Wolff
       Title:     Vice President

Consented to:

REALTY INCOME CORPORATION

By:               /s/ Gary Malino
      Name:       Gary M. Malino
      Title:      President, Chief Operating Officer

                                       2
<PAGE>

                                     ANNEX 1

  The $200,000,000 Revolving Credit Agreement dated as of December 14, 1999, as
amended among Realty Income Corporation, the Lenders parties thereto, The Bank
of New York as Administrative Agent and as Swing Line Bank , and the other
agents parties thereto

                        STANDARD TERMS AND CONDITIONS FOR
                            ASSIGNMENT AND ASSUMPTION

                  1.  Representations and Warranties.
                      ------------------------------

                  1.1 Assignor. The Assignor (a) represents and warrants that
(i) it is the legal and beneficial owner of the Assigned Interest, (ii) the
Assigned Interest is free and clear of any lien, encumbrance or other adverse
claim and (iii) it has full power and authority, and has taken all action
necessary, to execute and deliver this Assignment and Assumption and to
consummate the transactions contemplated hereby; and (b) assumes no
responsibility with respect to (i) any statements, warranties or representations
made in or in connection with the Credit Agreement or any other Credit Document,
(ii) the execution, legality, validity, enforceability, genuineness, sufficiency
or value of the Credit Documents or any collateral thereunder, (iii) the
financial condition of the Borrower, any of its Subsidiaries or Affiliates or
any other Person obligated in respect of any Credit Document or (iv) the
performance or observance by the Borrower, any of its Subsidiaries or Affiliates
or any other Person of any of their respective obligations under any Credit
Document.

                  1.2. Assignee. The Assignee (a) represents and warrants that
(i) it has full power and authority, and has taken all action necessary, to
execute and deliver this Assignment and Assumption and to consummate the
transactions contemplated hereby and to become a Lender under the Credit
Agreement, (ii) it meets all requirements of an Assignee under the Credit
Agreement (subject to receipt of such consents as may be required under the
Credit Agreement), (iii) from and after the Effective Date, it shall be bound by
the provisions of the Credit Agreement as a Lender thereunder and, to the extent
of the Assigned Interest, shall have the obligations of a Lender thereunder,
(iv) it has received a copy of the Credit Agreement, together with copies of the
most recent financial statements delivered pursuant to Section 7.01 thereof, as
applicable, and such other documents and information as it has deemed
appropriate to make its own credit analysis and decision to enter into this
Assignment and Assumption and to purchase the Assigned Interest on the basis of
which it has made such analysis and decision independently and without reliance
on the Administrative Agent or any other Lender, and (b) agrees that (i) it
will, independently and without reliance on the Administrative Agent, the
Assignor or any other Lender, and based on such documents and information as it
shall deem appropriate at the time, continue to make its own credit decisions in
taking or not taking action under the Credit Documents, and (ii) it will perform
in accordance with their terms all of the obligations which by the terms of the
Credit Documents are required to be performed by it as a Lender.

                  2. Payments. From and after the Effective Date, the
Administrative Agent shall make all payments in respect of the Assigned Interest
(including payments of principal, interest, fees and other amounts) to the
Assignor for amounts which have accrued to but excluding the Effective Date and
to the Assignee for amounts which have accrued from and after the Effective
Date.

                  3. General Provisions. This Assignment and Assumption shall be
binding upon, and inure to the benefit of, the parties hereto and their
respective successors and assigns. This Assignment and Assumption may be
executed in any number of counterparts, which together shall constitute one
instrument. Delivery of an executed counterpart of a signature page of this
Assignment and Assumption by telecopy shall be effective as delivery of a
manually executed counterpart of this Assignment and Assumption. This Assignment
and Assumption shall be governed by, and construed in accordance with, the law
of the State of New York.

                                       3
<PAGE>1991 Stock Option Plan

EXHIBIT 10.2

 

	
IDEXX LABORATORIES, INC.

	 
	
1991 STOCK OPTION PLAN

	 
	
(as of February 13, 2002)

1.              Purpose.

                    The purpose of this plan (the "Plan") is to secure for IDEXX Laboratories, Inc. (the "Company") and its shareholders the benefits arising from capital stock ownership by employees, officers and directors of, and consultants or advisors to, the Company and its parent and subsidiary corporations who are expected to contribute to the Company's future growth and success.  Except where the context otherwise requires, the term "Company" shall include the parent and all present and future subsidiaries of the Company as defined in Sections 424(e) and 424(f) of the Internal Revenue Code of 1986, as amended or replaced from time to time (the "Code").  Those provisions of the Plan which make express reference to Section 422 of the Code shall apply only to Incentive Stock Options (as that term is defined in the Plan).

2.              Type of Options and Administration.

                    (a)          Types of Options.  Options granted pursuant to the Plan shall be authorized by action of the Board of Directors of the Company (or a Committee designated by the Board of Directors) and may be either incentive stock options ("Incentive Stock Options") meeting the requirements of Section 422 of the Code or non-qualified options which are not intended to meet the requirements of Section 422 of the Code.

                    (b)          Administration.  The Plan will be administered by the Board of Directors of the Company, whose construction and interpretation on the terms and provisions of the Plan shall be final and conclusive.  The Board of Directors may in its sole discretion grant options to purchase shares of the Company's Common Stock, par value $.10 per share ("Common Stock"), and issue shares upon exercise of such options as provided in the Plan.  The Board shall have authority, subject to the express provisions of the Plan, to construe the respective option agreements and the Plan, to prescribe, amend and rescind rules and regulations relating to the Plan, to determine the terms and provisions of the respective options agreements, which need not be identical, and to make all other determinations in the judgment of the Board of Directors necessary or desirable for the administration of the Plan.  The Board of Directors may correct any defect or supply any omission or reconcile any inconsistency in the Plan or in any option agreement in the manner and to the extent it shall deem expedient to carry the Plan into effect and it shall be the sole and final judge of such expediency.  No director or person acting pursuant to authority delegated by the Board of Directors shall be liable for any action or determination made in good faith.  The Board of Directors may, to the full extent permitted by or consistent with applicable laws or regulations (including, without limitation, applicable state law and Rule 16b-3 promulgated under the Securities Exchange Act of 1934 (the "Exchange Act"), or any successor rule ("Rule 16b-3")), delegate any or all of its powers under the Plan to a committee (the "Committee") appointed by the Board of Directors, and if the Committee is so appointed all references to the Board of Directors in the Plan shall mean and relate to such Committee or to the executive officers referred to in Section 2(c) to the extent that the Board of Directors' power or authority under the Plan has been delegated to such executive officers.

                    (c)          Delegation to Executive Officers.  To the extent permitted by applicable law, the Board of Directors may delegate to one or more executive officers of the Company the power to grant options to employees or officers of the Company or any of its present or future subsidiary corporations and to exercise such other powers under the Plan as the Board of Directors may determine, provided that the Board of Directors shall fix the terms of the options to be granted by such executive officers (including the exercise price of such options, which may include a formula by which the exercise price will be determined) and the maximum number of shares subject to options that the executive officers may grant; provided further, however, that no executive officer shall be authorized to grant options to any "executive officer" of the Company (as defined by Rule 3b-7 under the Exchange Act) or to any "officer" of the Company (as defined by Rule 16a-1 under the Exchange Act).

Page 1

                    (d)          Applicability of Rule 16b-3.  Those provisions of the Plan which make express reference to Rule 16b-3 shall apply to the Company only at such time as the Company's Common Stock or another class of equity security is registered under the Exchange Act, and then only to such persons as are required to file reports under Section 16(a) of the Exchange Act.

3.              Eligibility.

                    (a)          General.  Options may be granted to persons who are, at the time of grant, employees or officers of the Company; provided, that Incentive Stock Options may be granted only to persons who are eligible to receive such options under Section 422 of the Code.  In additional, no person shall be granted any Incentive Stock Option under the Plan who, at the time such option is granted, owns, directly or indirectly, stock possessing more than 10% of the total combined voting power of all classes of stock of the Company, unless the requirements of Section 11(b) are satisfied.  The attribution of stock ownership provisions of Section 424(d) of the Code, and any successor provisions thereto, shall be applied in determining the shares of stock owned by a person for purposes of applying the foregoing percentage limitation.  A person who has been granted an option may, if he or she is otherwise eligible, be granted an additional option or options if the Board of Directors shall so determine.  Subject to adjustment as provided in Section 15 below, the maximum number of shares with respect to which options may be granted to any employee under the Plan shall not exceed 1,000,000 shares of common stock during any one calendar year.  For the purpose of calculating such maximum number, (a) an option shall continue to be treated as outstanding notwithstanding its repricing, cancellation, or expiration and (b) the repricing of an outstanding option or the issuance of a new option in substitution for a cancelled option shall be deemed to constitute the grant of a new additional option separate from the original grant of the option that is repriced or cancelled.

                    (b)          Grant of Options to Directors and Officers.  From and after the registration of the Common Stock of the Company under the Exchange Act, the selection of a director or an officer (as the terms "director" and "officer" are defined for the purposes of Rule 16b-3) as a recipient of an option, the timing of the option grant, the exercise price of the option and the number of shares subject to the option shall be determined either (i) by the Board of Directors, of which all members shall be "disinterested persons" (as hereinafter defined), or (ii) by a committee of two or more directors having full authority to act in the matter, of which all members shall be "disinterested persons".  For the purposes of the Plan, a director shall be deemed to be a "disinterested person" only is such person qualifies as a "disinterested person" within the meaning of Rule 16b-3, as such term is interpreted from time to time.

Page 2

4.              Stock Subject to Plan.

                    Subject to adjustment as provided in Section 15 below, the maximum number of shares of Common Stock of the Company which may be issued and sold under the Plan is 6,475,000 shares.  Such shares may be authorized and unissued shares or may be shares issued and thereafter acquired by the Company.  If an option granted under the Plan shall expire or terminate for any reason without having been exercised in full, the unpurchased shares subject to such option shall again be available for subsequent option grants under the Plan.  If shares issued upon exercise of an option under the Plan are tendered to the Company in payment of the exercise price of an option granted under the Plan, such tendered shares shall again be available for subsequent option grants under the Plan; provided, that in no event shall (i) the total number of shares issued pursuant to the exercise of Incentive Stock Options under the Plan, on a cumulative basis, exceed the maximum number of shares authorized for issuance under the Plan exclusive of shares made available for issuance pursuant to this sentence or (ii) the total number of shares issued pursuant to the exercise of options by persons who are required to file reports under Section 16(a) of the Exchange Act, on a cumulative basis, exceed the maximum number of shares authorized for issuance under the Plan exclusive of shares made available for issuance pursuant to this sentence.

5.              Forms of Option Agreements.

                    As a condition to the grant of an option under the Plan, each recipient of an option shall execute an option agreement in such form not inconsistent with the Plan as may be approved by the Board of Directors.  Each option agreement shall specifically state whether the options granted thereby are intended to be Incentive Stock Options or non-qualified options.  Such option agreements may differ among recipients.

6.              Purchase Price.

                    (a)          General.  The purchase price per share of stock deliverable upon the exercise of an option shall be determined by the Board of Directors, provided, however, that the exercise price shall not be less than 100% of the fair market value of such stock, as determined by the Board of Directors, at the time of grant of such option, or less than 110% of such fair market value in the case of options described in Section 11(b).

                    (b)          Payment of Purchase Price.  Options granted under the Plan may provide for the payment of the exercise price by delivery of cash or a check to the order of the Company in an amount equal to the exercise price of such options, or, to the extent provided in the applicable option agreement, (i) by delivery to the Company of shares of Common Stock of the Company already owned by the optionee having a fair market value equal in amount to the exercise price of the options being exercised, (ii) by any other means which the Board of Directors determines are consistent with the purpose of the Plan and with the applicable laws and regulations (including, without limitation, the provisions of Rule 16b-3 and Regulation T promulgated by the Federal Reserve Board) or (iii) by any combination of such methods of payment.  The fair market value of any shares of the Company's Common Stock or other non-cash consideration which may be delivered upon exercise of an option shall be determined by the Board of Directors.

Page 3

7.              Option Period.

                    Each option and all rights thereunder shall expire on such date as the Board of Directors shall determine, except that (i) in the case of an Incentive Stock Option, such date shall not be later than ten years after the date on which the option is granted, (ii) in the case of an Incentive Stock Option described in Section 11(b), such date shall not be later than five years after the date on which the option is granted and (iii) in all cases, options shall be subject to earlier termination as provided in the Plan.

8.              Exercise of Options.

                    Each option granted under the Plan shall be exercisable either in full or in installments at such time or times and during such period as shall be set forth in the agreement evidencing such option, subject to the provisions of the Plan.

9.              Nontransferability of Options.

                    Incentive Stock Options shall not be assignable or transferable by the person to whom they are granted, either voluntarily or by operation of law, except by will or the laws of decent and distribution, and, during the life of the optionee, shall be exercisable only by the optionee.  With the approval of the Board of Directors, non-qualified stock options may be transferred by gift to (i) one or more members of the optionee's family or entities controlled by, or for the benefit of the optionee or such family members, or (ii) one or more charitable organizations (including charitable trusts).  Except as the Board of Directors may otherwise determine, no option or interest therein may be transferred, assigned, pledged or hypothecated by the optionee during his lifetime, whether by operation of law or otherwise, or be made subject to execution, attachment or similar process.

10.          Effect of Termination of Employment

                    Except as provided in Section 11(d) with respect to Incentive Stock Options, the Board of Directors shall determine the period of time during which an optionee may exercise an option following (i) the termination of the optionee's employment with the Company or (ii) the death or disability of the optionee. Such periods shall be set forth in the agreement evidencing such option.

11.          Incentive Stock Options.

                    Options granted under the Plan which are intended to be Incentive Stock Options shall be subject to the following additional terms and conditions:

Page 4

                    (a)          Express Designation.  All Incentive Stock Options granted under the Plan shall, at the time of grant, be specifically designated as such in the option agreement covering such Incentive Stock Options.

                    (b)          10% Stockholder.  If any employee to whom an Incentive Stock Option is to be granted under the Plan is, at the time of the grant of such option, the owner of stock possessing more than 10% of the total combined voting power of all classes of stock of the Company (after taking into account the attribution of stock ownership rules of Section 424(d) of the Code), then the following special provisions shall be applicable to the Incentive Stock Option granted to such individual:

                              (i)          the purchase price per share of the Common Stock subject to such Incentive Stock Option shall not be less than 110% of the fair market value of one share of Common Stock at the time of grant; and

                              (ii)          the option exercise period shall not exceed five years from the date of grant.

                    (c)          Dollar Limitation.  For so long as the Code shall so provide, options granted to any employee under the Plan (and any other incentive stock option plans of the Company) which are intended to constitute Incentive Stock Options shall not constitute Incentive Stock Options to the extent that such options, in the aggregate, become exercisable for the first time in any one calendar year for shares of Common Stock with an aggregate fair market value (determined as of the respective date or dates of grant) of more than $100,000.

                    (d)          Termination of Employment, Death or Disability.  No Incentive Stock Option may be exercised unless, at the time of such exercise, the optionee is, and has been continuously since the date of grant of his or her option, employed by the Company, except that:

                              (i)          an Incentive Stock Option may be exercised within the period of three months after the date the optionee ceases to be an employee of the Company (or within such lesser period as may be specified in the applicable option agreement), provided, that the agreement with respect to such option may designate a longer exercise period and that the exercise after such three-month period shall be treated as the exercise of a non-qualified option under the Plan;

                              (ii)          if the optionee dies while in the employ of the Company, or within three months after the optionee ceases to be such an employee, the Incentive Stock Option may be exercised by the person to whom it is transferred by will or the laws of descent and distribution within the period of one year after the date of death (or within such lesser period as may be specified in the applicable option agreement); and

                              (iii)          if the optionee becomes disabled (within the meaning of Section 22(e)(3) of the Code or any successor provision thereto) while in the employ of the Company, the Incentive Stock Option may be exercised within the period of one year after the date the optionee ceases to be such an employee because of such disability (or within such lesser period as may be specified in the applicable option agreement).

Page 5

                    For all purposes of the Plan and any option granted hereunder, "employment" shall be defined in accordance with the provisions of Section 1.421-7(h) of the Income Tax Regulations (or any successor regulations).  Notwithstanding the foregoing provisions, no Incentive Stock Option may be exercised after its expiration date.

12.          Additional Provisions.

                    (a)          Additional Option Provisions.  The Board of Directors may, in its sole discretion, include additional provision in any option agreement covering options granted under the Plan, including without limitation restrictions on transfer, repurchase rights, commitments to pay cash bonuses, to make, arrange for or guaranty loans or to transfer other property to optionees upon exercise of options, or such other provisions as shall be determined by the Board of Directors; provided that such additional provisions shall not be inconsistent with any other term or condition of the Plan and such additional provisions shall not cause any Incentive Stock Option granted under the Plan to fail to qualify as an Incentive Stock Option within the meaning of Section 422 of the Code.

                    (b)          Acceleration, Extension, Etc.  The Board of Directors may, in its sole discretion, (i) accelerate the date or dates on which all or any particular option or options granted under the Plan may be exercised or (ii) extend the dates during which all, or any particular option or options granted under the Plan may be exercised; provided, however, that no such extension shall be permitted if it would cause the Plan to fail to comply with Section 422 of the Code or with Rule 16b-3.

13.          General Restrictions.

                    (a)          Investment Representations.  The Company may require any person to whom an option is granted, as a condition of exercising such option, to give written assurances in substance and form satisfactory to the Company to the effect that such person is acquiring the Common Stock subject to the option for his or her own account for investment and not with any present intention of selling or otherwise distributing the same, and to such other effects as the Company deems necessary or appropriate in order to comply with federal and applicable state securities laws, or with covenants or representations made by the Company in connection with any public offering of its Common Stock.

                    (b)          Compliance With Securities Laws.  Each option shall be subject to the requirement that if, at any time, counsel to the Company shall determine that the listing, registration or qualification of the shares subject to such option upon any securities exchange or under any state or federal law, or the consent or approval of any governmental or regulatory body, or that the disclosure of non-public information or the satisfaction of any other condition is necessary as a condition of, or in connection with, the issuance or purchase of shares thereunder, such option may not be exercised, in whole or in part, unless such listing, registration, qualification, consent or approval, or satisfaction of such condition shall have been effected or obtained on conditions acceptable to the Board of Directors.  Nothing herein shall be deemed to require the Company to apply for or to obtain such listing, registration or qualification, or to satisfy such condition.

14.          Rights as a Shareholder.

                    The holder of an option shall have no rights as a shareholder with respect to any shares covered by the option (including, without limitation, any rights to receive dividends or non-cash distributions with respect to such shares) until the date of issue of a stock certificate to him or her for such shares.  No adjustment shall be made for dividends or other rights for which the record date is prior to the date such stock certificate is issued.

Page 6

15.          Adjustment Provisions for Recapitalizations and Related Transactions.

                    (a)          General.  If, through or as a result of any merger, consolidation, sale of all or substantially all of the assets of the Company, reorganization, recapitalization, reclassification, stock dividend, stock split, reverse stock split, or other similar transaction, (i) the outstanding shares of Common Stock are increased or decreased or are exchanged for a different number or kind of shares or other securities of the Company, or (ii) additional shares or new or different shares or other securities of the Company or other non-cash assets are distributed with respect to such shares of Common Stock or other securities, an appropriate and proportionate adjustment may be made in (x) the maximum number and kind of shares reserved for issuance under the Plan, (y) the number and kind of shares or other securities subject to then outstanding options under the Plan, and (z) the price for each share subject to any then outstanding options under the Plan, without changing the aggregate purchase price as to which such options remain exercisable, provided that no adjustment shall be made pursuant to this Section 15 if such adjustment would cause the Plan to fail to comply with Section 422 of the Code or with Rule 16b-3.

                    (b)          Board Authority to Make Adjustments.  Any adjustments under this Section 15 will be made by the Board of Directors, whose determination as to what adjustments, if any, will be made and the extent thereof will be final, binding and conclusive.  No fractional shares will be issued under the Plan on account of any such adjustments.

16.          Merger, Consolidation, Asset Sale, Liquidation, Etc.

                    (a)          General.  In the event of a consolidation or merger or sale of all or substantially all of the assets of the Company in which outstanding shares of Common Stock are exchanged for securities, cash or other property of any other corporation or business entity or in the event of a liquidation of the Company (each of these events collectively being referred to herein as an "Acquisition Event"), the Board shall provide that all outstanding options shall be assumed, or equivalent options shall be substituted, by the acquiring or succeeding corporation (or an affiliate thereof), provided that any options substituted for Incentive Stock Options shall satisfy, in the determination of the Board, the requirements of Section 424(a) of the Code.  Notwithstanding the foregoing, if the acquiring or succeeding corporation (or an affiliate thereof) does not agree to assume, or substitute for, such options, then the Board of Directors shall upon written notice to the optionees, provide that all then unexercised options will become exercisable in full as of a specified time (the "Acceleration Time") prior to an Acquisition Event and will terminate immediately prior to the consummation of such Acquisition Event, except to the extent exercised by the optionees before the consummation of such Acquisition Event; provided, however, that, in the event of an Acquisition Event under the terms of which holders of Common Stock will receive upon consummation thereof a cash payment for each share of Common Stock surrendered pursuant to such Acquisition Event (the "Acquisition Price"), then the Board may instead provide that all outstanding options shall terminate upon consummation of such Acquisition Event and that each optionee shall receive, in exchange therefor, a cash payment equal to the amount (if any) by which (A) the Acquisition Price multiplied by the number of shares of Common Stock subject to such outstanding options (whether or not then exercisable), exceeds (B) the aggregate exercise price of such options.

Page 7

                    (b)          Substitute Options.  The Company may grant options under the Plan in substitution for options held by employees of another corporation who become employees of the Company, or a subsidiary of the Company, as the result of a merger or consolidation of the employing corporation with the Company or a subsidiary of the Company, or as a result of the acquisition by the Company, or one of its subsidiaries, of property or stock of the employing corporation.  The Company may direct that substitute options be granted on such terms and conditions as the Board of Directors considers appropriate in the circumstances.

                    (c)          Acceleration of Options Upon Change of Control. Immediately prior to the consummation of a Change of Control, each then outstanding option under the Plan shall become immediately exercisable as to twenty-five percent (25%) of the number of shares as to which such option would otherwise not then be exercisable (rounded down to the nearest whole share), and the number of shares as to which each such option shall become exercisable on each vesting date set forth in the applicable option agreement shall be reduced by 25%.  In addition, all such options held by an optionee that are not terminated pursuant to Section 16(a) above shall immediately become exercisable in full if and when, within 24 months after a Change of Control, such optionee's employment with the Company (or the acquiring or succeeding entity) is involuntarily terminated by the Company (or such acquiring or succeeding entity) other than for Cause (as defined below).

                    (d)          Definition of Change of Control.  "Change of Control" shall mean:

                              (i)          The acquisition by an individual, entity or group (within the meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange Act")) (a "Person") of beneficial ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act) of 30% or more of either (A) the then-outstanding shares of common stock of the Company (the "Outstanding Company Common Stock") or (B) the combined voting power of the then-outstanding voting securities of the Company entitled to vote generally in the election of directors (the "Outstanding Company Voting Securities"); provided, however, that for purposes of this subsection (d)(i), the following acquisitions shall not constitute a Change of Control: (1) any acquisition directly from the Company, (2) any acquisition by the Company, (3) any acquisition by any employee benefit plan (or related trust) sponsored or maintained by the Company or any corporation controlled by the Company, or (4) any acquisition by any corporation pursuant to a transaction which satisfies the criteria set forth in clauses (A), (B) and (C) of subsection (d)(iii) of this Section 16; or

                              (ii)          Individuals who, as of the date hereof, constitute the Board of Directors (the "Incumbent Board") cease for any reason to constitute at least a majority of the Board of Directors; provided, however, that any individual becoming a director subsequently to the date hereof whose election, or nomination for election by the Company's shareholders, was approved by a vote of at least a majority of the directors then comprising the Incumbent Board shall be considered as though such individual were a member of the Incumbent Board, but excluding, for this purpose, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest with respect to the election or removal of directors or other actual or threatened solicitation of proxies or consents by or on behalf of a Person other than the Board of Directors; or 

                              (iii)          Consummation of a reorganization, merger or consolidation or sale or other disposition of all or substantially all of the assets of the Company (a "Business Combination"), in each case, unless, immediately following such Business Combination, (A) all or substantially all of the individuals and entities who were the beneficial owners, respectively, of the Outstanding Company Common Stock and Outstanding Company Voting Securities immediately prior to such Business Combination beneficially own, directly or indirectly, more than 60% of, respectively, the then-outstanding shares of common stock and the combined voting power of the then-outstanding voting securities entitled to vote generally in the election of directors, of the corporation resulting from such Business Combination (which as used in this Section 16(d)(iii) shall include, without limitation, a corporation which as a result of such transaction owns the Company or all or substantially all of the Company's assets either directly or through one or more subsidiaries) in substantially the same proportions as their ownership, immediately prior to such Business Combination of the Outstanding Company Common Stock and Outstanding Company Voting Securities, as the case may be, (B) no Person (excluding any corporation resulting from such Business Combination or any employee benefit plan (or related trust) of the Company or such corporation resulting from such Business Combination) beneficially owns, directly or indirectly, 30% or more of, respectively, the then outstanding shares of common stock of the corporation resulting from such Business Combination, or the combined voting power of the then-outstanding voting securities of such corporation and (C) at least half of the members of the board of directors of the corporation resulting from such Business Combination were members of the Incumbent Board at the time of the execution of the initial agreement, or of the action of the Board of Directors, providing for such Business Combination; or

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                              (iv)          Approval by the shareholders of the Company of a complete liquidation or dissolution of the Company.

                    (e)          Definition of Cause.  "Cause" shall mean:

                              (i)          the failure of the optionee to perform substantially the optionee's duties with the Company (other than any such failure resulting from incapacity due to physical or mental illness), which failure is not cured within 30 days after a written demand for substantial performance is delivered to the optionee by the optionee's manager or the Board of Directors which specifically identifies the manner in which such manager or the Board of Directors, as applicable, believes that the optionee has not substantially performed the optionee's duties, or

                              (ii)          the engaging by the optionee in illegal conduct or gross misconduct which is injurious to the Company."

17.          No Special Employment Rights.

                    Nothing contained in the Plan or in any option shall confer upon any optionee any right with respect to the continuation of his or her employment by the Company or interfere in any way with the right of the Company at any time to terminate such employment or to increase or decrease the compensation of the optionee.

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18.          Other Employee Benefits.

                    Except as to plans which by their terms include such amounts as compensation, the amount of any compensation deemed to be received by an employee as a result of the exercise of an option or the sale of shares received upon such exercise will not constitute compensation with respect to which any other employee benefits of such employee are determined, including, without limitation, benefits under any bonus, pension, profit-sharing, life insurance or salary continuation plan, except as otherwise specifically determined by the Board of Directors.

19.          Amendment of the Plan.

                    (a)          The Board of Directors may at any time, and from time to time, modify or amend the Plan in any respect, except that if at any time the approval of the shareholders of the Company is required under Section 422 of the Code or any successor provision with respect to Incentive Stock Options or under Rule 16b-3 or with respect to options held by persons who are required to file reports pursuant to Section 16(a) of the Exchange Act, the Board of Directors may not effect such modification or amendment without such approval.  In addition, the Board of Directors may not amend Section 24 of the Plan without the prior approval of the shareholders of the Company.

                    (b)          The termination or any modification or amendment of the Plan shall not, without the consent of an optionee, affect his or her rights under an option previously granted to him or her.  With the consent of the optionee affected, the Board of Directors may amend outstanding option agreements in a manner not inconsistent with the Plan.  The Board of Directors shall have the right to amend or modify (i) the terms and provisions of the Plan and of any outstanding Incentive Stock Options granted under the Plan to the extent necessary to qualify any or all such options for such favorable federal income tax treatment (including deferral of taxation upon exercise) as may be afforded incentive stock options under Section 422 of the Code and (ii) the terms and provisions of the Plan and of any outstanding option to the extent necessary to ensure the qualification of the Plan under Rule 16b-3.

20.          Withholding.

                    (a)          The Company shall have the right to deduct from payments of any kind otherwise due to the optionee any federal, state or local taxes of any kind required by law to be withheld with respect to any shares issued upon exercise of options under the Plan.  Subject to the prior approval of the Company, which may be withheld by the Company in its sole discretion, the optionee may elect to satisfy such obligations, in whole or in part, (i) by causing the Company to withhold shares of Common Stock otherwise issuable pursuant to the exercise of an option or (ii) by delivering to the Company shares of Common Stock already owned by the optionee.  The shares so delivered or withheld shall have a fair market value equal to such withholding obligation.  The fair market value of the shares used to satisfy such withholding obligation shall be determined by the Company as of the date that the amount of tax to be withheld is to be determined.  An optionee who has made an election pursuant to this Section 20(a) may only satisfy his or her withholding obligation with shares of Common Stock which are not subject to any repurchase, forfeiture, unfulfilled vesting or other similar requirements.

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                    (b)          Notwithstanding the foregoing, in the case of a director or officer, no election to use shares for the payment of withholding taxes shall be effective unless made in compliance with any applicable requirements of Rule 16b-3.

21.          Cancellation and New Grant of Options, Etc.

                    The Board of Directors shall have the authority to effect, at any time and from time to time, with the consent of the affected optionees, (i) the cancellation of any or all outstanding options under the Plan and the grant in substitution therefor of new options under the Plan covering the same or different numbers of shares of Common Stock and having an option exercise price per share which may be lower or higher than the exercise price per share of the cancelled options or (ii) the amendment of the terms of any and all outstanding options under the Plan to provide an option exercise price per share which is higher or lower that the then-current exercise price per share of such outstanding options.

22.          Effective Date and Duration of the Plan.

                    (a)          Effective Date.  The Plan shall become effective when adopted by the Board of Directors, but no Incentive Stock Option granted under the Plan shall become exercisable unless and until the Plan shall have been approved by the Company's shareholders.  If such shareholder approval is not obtained within twelve months after the date of the Board's adoption of the Plan, no options previously granted under the Plan shall be deemed to be Incentive Stock Options and no further Incentive Stock Options shall be granted.  Amendments to the Plan not requiring shareholder approval shall become effective when adopted by the Board of Directors; amendments requiring shareholder approval (as provided in Section 19) shall become effective when adopted by the Board of Directors, but no Incentive Stock Option granted after the date of such amendment shall become exercisable (to the extent that such amendment to the Plan was required to enable the Company to grant such Incentive Stock Option to a particular optionee) unless and until such amendment shall have been approved by the Company's shareholders.  If such shareholder approval is not obtained within twelve months of the Board's adoption of such amendment, any Incentive Stock Options granted on or after the date of such amendment shall terminate to the extent that such amendment to the Plan was required to enable the Company to grant such option to a particular optionee.  Subject to this limitation, options may be granted under the Plan at any time after the effective date and before the date fixed for termination of the Plan.

                    (b)          Termination.  Unless sooner terminated in accordance with Section 16, the Plan shall terminate, with respect to Incentive Stock Options, upon the earlier of (i) the close of business on the day next preceding the tenth anniversary of the date of its adoption by the Board of Directors, or (ii) the date on which all shares available for issuance under the Plan shall have been issued pursuant to the exercise or cancellation of options granted under the Plan.  Unless sooner terminated in accordance with Section 16, the Plan shall terminate with respect to options which are not Incentive Stock Options on the date specified in (ii) above.  If the date of termination is determined under (i) above, then options outstanding on such date shall continue to have force and effect in accordance with the provisions of the instruments evidencing such options.

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23.          Provisions for Foreign Participants.

                    The Board of Directors may, without amending the Plan, modify awards or options granted to participants who are foreign nationals or employed outside the United States to recognize differences in laws, rules, regulations or customs of such foreign jurisdictions with respect to tax, securities, currency, employee benefit or other matters.

24.          Prohibition on Repricing of Options.

                    Neither the Board of Directors nor the Company may amend the terms of any issued and outstanding option to reduce the exercise price, other than pursuant to Section 15 of the Plan, without prior approval of shareholders of the Company.

	
Adopted by the Board of Directors on April 24, 1991; adopted by stockholders on June 10, 1991.

	 
	
Amended by the Board of Directors on February 12, 1992; amendment approved by stockholders 

	
on May 1, 1992.

	 
	
Amended by the Board of Directors on February 26, 1993; amendment approved by stockholders 

	
on May 18, 1993.

	 
	
Number of shares covered by the Plan reflects 2 for 1 stock split in the form of a stock dividend 

	
paid on October 1, 1993.

	 
	
Amended by the Board of Directors on February 9, 1995; amendment approved by stockholders 

	
on May 26, 1995.

	 
	
Number of shares covered by the Plan reflects 2 for 1 stock split in the form of a stock dividend 

	
paid on June 5, 1995.

	 
	
Amended by the Board of Directors on March 5, 1996; amendment approved by the stockholders 

	
on May 24, 1996.

	 
	
Amended by the Board of Directors on February 17, 1999.

	 
	
Amended by the Board of Directors on July 21, 1999.

	 
	
Amended by the Board of Directors on May 23, 2001.

	 
	
Amended by the Board of Directors on February 13, 2002.

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