LIGHTBRIDGE INC
S-8, 1997-11-07
RADIOTELEPHONE COMMUNICATIONS
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<PAGE>
 
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 7, 1997

                                                           Registration No. 333-
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C.

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

                                   FORM S-8
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933

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

                               LIGHTBRIDGE, INC.
            (Exact Name of Registrant as Specified in Its Charter)

                                   DELAWARE
        (State or Other Jurisdiction of Incorporation or Organization)

                                  04-3065140
                     (I.R.S. Employer Identification No.)

              67 SOUTH BEDFORD STREET, BURLINGTON, MASSACHUSETTS       01803
                  (Address of Principal Executive Offices)           (Zip Code)

          CORAL SYSTEMS, INC. AMENDED AND RESTATED STOCK OPTION PLAN
                           (Full Title of the Plan)

                               PAMELA D.A. REEVE
                     President and Chief Executive Officer
                               Lightbridge, Inc.
                            67 South Bedford Street
                       Burlington, Massachusetts  01803
                    (Name and Address of Agent for Service)

                                (781) 359-4000
         (Telephone Number, Including Area Code, of Agent For Service)

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

                                  Copies to:
                           Mark L. Johnson, Esquire
                            Foley, Hoag & Eliot LLP
                            One Post Office Square
                          Boston, Massachusetts 02109
                                (617) 832-1000

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

                        CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
===================================================================================================================================
                                                                  PROPOSED           PROPOSED                                       
                                                  AMOUNT           MAXIMUM            MAXIMUM                                       
    TITLE OF EACH CLASS OF                         TO BE       OFFERING PRICE        AGGREGATE         AMOUNT OF                    
 SECURITIES TO BE REGISTERED                    REGISTERED      PER SHARE(1)     OFFERING PRICE(1)  REGISTRATION FEE                
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                                           <C>              <C>               <C>                <C> 
Common Stock, $.01 par value........          70,000 shares(1)    $6.22              $435,400            $132 
=================================================================================================================================== 

</TABLE>

(1)  For shares issuable pursuant to stock options outstanding at November 7,
     1997 under the Coral Systems, Inc. Amended and Restated Option Plan,
     calculated pursuant to Rule 457(h) based on the exercise price of such
     options.

================================================================================
<PAGE>
 
     [On November 7, 1997, Lightbridge, Inc. ("Lightbridge") acquired all of the
outstanding capital stock of Coral Systems, Inc. ("Coral") as the result of a 
merger between Coral and a wholly owned subsidiary of Lightbridge. In connection
with the merger, all of the options previously granted under Coral's Amended and
Restated Stock Option Plan, which prior to the merger were (when vested) 
exercisable to purchase Coral common stock, were assumed by Lightbridge and are
now (when vested) exercisable to purchase Lightbridge common stock. This 
Registration Statement is being filed with respect to the shares of Lightbridge 
common stock so purchasable under options outstanding under Coral's Amended and
Restated Stock Option Plan.]


                                    PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.  INCORPORATION OF DOCUMENTS BY REFERENCE.

   Lightbridge, Inc. (the "Company") hereby incorporates by reference the
following documents previously filed with the Securities and Exchange Commission
(the "Commission") pursuant to the Securities Exchange Act of 1934 (the
"Exchange Act"):

   (1) the Company's Annual Report on Form 10-K for the fiscal year ended
       December 31, 1996;

   (2) the Company's definitive Proxy Statement dated April 21, 1997 used in
       connection with its Annual Meeting of Stockholders held on May 22, 1997;

   (3) the Company's Quarterly Reports on Form 10-Q for the fiscal quarters
       ended March 31, 1997 and June 30, 1997;

   (4) the Company's Current Reports on Form 8-K dated October 9, 1997 and 
       October 28, 1997;

   (5) the description of the Company's Common Stock contained in the
       Registration Statement on Form 8-A filed by the Company with the
       Commission on September 6, 1996 under Section 12 of the Exchange Act,
       including any amendment or description filed for the purpose of updating
       such description; and

   (6) all documents subsequently filed by the Company pursuant to Sections
       13(a), 13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a
       post-effective amendment which indicates that all securities offered have
       been sold or which de-registers all securities then remaining unsold,
       shall be deemed to be incorporated by reference in this Registration
       Statement and to be part hereof from the date of filing of such
       documents.

   Any statement contained herein or in a document incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified and superseded
for purposes of this Registration Statement to the extent that a statement
contained herein or in a document incorporated or deemed to be incorporated by
reference herein modifies or supersedes such statement.  Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Registration Statement.

ITEM 4.  DESCRIPTION OF SECURITIES.

   Not applicable.

ITEM 5.  INTERESTS OF NAMED EXPERTS AND COUNSEL.

   Not applicable.

ITEM 6.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

   Section 145 of the Delaware General Corporation Law affords a Delaware
corporation the power to indemnify its present and former directors and offices
under certain conditions.  Article SEVENTH of the Company's Amended and Restated
Certificate of Incorporation (the "Restated Charter") provides that the Company
shall indemnify each person who at any time is, or shall have been, a director
or officer of the Company, and is threatened to be or is made a party to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative, by reason of the fact that he is, or
was, a director or officer 

                                      II-1
<PAGE>
 
of the Company, or served at the request of the Company as a director, officer,
employee, trustee, or agent of another corporation, partnership, joint venture,
trust or other enterprise, against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement incurred in connection with any
such action, suit or proceeding to the maximum extent permitted by the General
Corporation Law of the State of Delaware.

   Section 102(b)(7) of the Delaware Corporation Law gives a Delaware
corporation the power to adopt a charter provision eliminating or limiting the
personal liability of directors to the corporation or its stockholders for
breach of fiduciary duty as directors, provided that such provision may not
eliminate or limit the liability of directors for (i) any breach of the
director's duty of loyalty to the corporation or its stockholders, (ii) any acts
or omissions not in good faith or which involve intentional misconduct or a
knowing violation of law, (iii) any payment of a dividend or approval of a stock
purchase that is illegal under Section 174 of the Delaware Corporation Law or
(iv) any transaction from which the director derived an improper personal
benefit.  Article NINTH of the Restated Charter provides that to the maximum
extent permitted by the General Corporation Law of the State of Delaware, no
director of the Company shall be personally liable to the Company or to any of
its stockholders for monetary damages arising out of such director's breach of
fiduciary duty as a director of the Company.  Furthermore, any amendment to or
repeal of the provisions of Article NINTH shall not apply to nor have any effect
on the liability or the alleged liability of any director of the Corporation
with respect to any act or failure to act of such director occurring prior to
such amendment or repeal.  A principal effect of such Article NINTH is to limit
or eliminate the potential liability of the Company's directors for monetary
damages arising from breaches of their duty of care, unless the breach involves
one of the four exceptions described in (i) through (iv) above.

   Section 145 of the Delaware General Corporation Law also affords a Delaware
corporation the power to obtain insurance on behalf of its directors and
officers against liabilities incurred by them in those capacities.  The Company
has procured a directors' and officers' liability and company reimbursement
liability insurance policy that (a) insures directors and officers of the
Company against losses (above a deductible amount) arising from certain claims
made against them by reason of certain acts done or attempted by such directors
or officers and (b) insures the Company against losses, (above a deductible
amount) arising from any such claims, but only if the Company is required or
permitted to indemnify such directors or officers for such losses under
statutory or common law or under provisions of the Restated Charter or the
Restated By-Laws.

ITEM 7.  EXEMPTION FROM REGISTRATION CLAIMED.
 
   Not applicable.
 
ITEM 8.    EXHIBITS.

Exhibit No.    Description
- -----------    -----------

   4.1/*/      Specimen certificate for the Common Stock
   5.1         Opinion of Foley, Hoag & Eliot LLP
  10.1         Coral Systems, Inc. Amended and Restated Stock Option Plan
  23.1         Consent of Deloitte & Touche LLP
  23.2         Consent of Foley, Hoag & Eliot LLP (included in Exhibit 5.1)
  24.1         Power of Attorney (contained on the signature page)
- ---------------
/*/ Filed as an exhibit to the Company's Registration Statement on Form S-1
    (file number 333-6589), as declared effective by the Commission on
    September 25, 1996 and incorporated herein by reference.

                                      II-2
<PAGE>
 
ITEM 9.  UNDERTAKINGS.

   1. The undersigned hereby undertakes:

      (a) To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:

          (i) To include any prospectus required by Section 10(a)(3) of the
      Securities Act of 1933;

          (ii) To reflect in the prospectus any facts or events arising after
      the effective date of the Registration Statement (or the most recent post-
      effective amendment thereof) which, individually or in the aggregate,
      represent a fundamental change in the information set forth in the
      Registration Statement;

          (iii)  To include any material information with respect to the plan of
      distribution not previously disclosed in the Registration Statement or any
      material change to such information in the Registration Statement;

PROVIDED, HOWEVER, that paragraphs 2 (a)(1)(i) and 2 (a)(1)(ii) do not apply if
the information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the Company pursuant to
Section 13 or Section 15(d) of the Exchange Act that are incorporated by
reference herein.

      (b) That, for the purpose of determining any liability under the
Securities Act of 1933, each such post-effective amendment shall be deemed to be
a new registration statement relating to the securities offered herein, and the
offering of such securities at that time shall be deemed to be the initial BONA
FIDE offering thereof.

      (c) To remove from registration by means of a post-effective amendment any
of the securities being registered which remain unsold at the termination of the
offering.

   2. The undersigned hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, each filing of the Company's annual
report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and,
where applicable, each filing of an employee benefit plan's annual report
pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference
in the Registration Statement shall be deemed to be a new registration statement
relating to the securities offered herein, and the offering of such securities
at that time shall be deemed to be the initial BONA FIDE offering thereof.

     3.   Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the Company pursuant to the foregoing provisions, or otherwise, the
Company has been advised that in the opinion of the Commission such
indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the Company of expenses incurred or
paid by a director, officer or controlling person of the Company in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Company will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

                                      II-3
<PAGE>
 
                                   SIGNATURES

     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
HAS DULY CAUSED THIS REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE
UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE TOWN OF BURLINGTON, THE
COMMONWEALTH OF MASSACHUSETTS, ON NOVEMBER 6, 1997.

                              LIGHTBRIDGE, INC.

                              By: /S/ PAMELA D.A. REEVE
                                 --------------------------------------
                              Pamela D.A. Reeve
                              President and Chief Executive Officer

                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS that each individual whose signature appears
below constitutes and appoints Pamela D.A. Reeve and William G. Brown, and each
of them, true and lawful attorneys-in-fact and agents with full power of
substitution, for and in name, place and stead, in any and all capacities, to
sign any and all amendments (including post-effective amendments) to this
Registration Statement, and to file the same, with all exhibits thereto, and all
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys-in-fact and agents, and each of them, full power
and authority to do and perform each and every act and thing which they, or any
of them, may deem necessary or advisable to be done in connection with this
Registration Statement, as fully to all intents and purposes as he or she might
or could do in person, hereby ratifying and confirming all that said attorneys-
in-fact and agents or any of them, or any substitute or substitutes for him, any
or all of them, may lawfully do or cause to be done by virtue hereof.

     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.

      SIGNATURE                        TITLE                        DATE
      ---------                        -----                        ----
 
/S/ PAMELA D.A. REEVE    President, Chief Executive           November 6, 1997
- ---------------------      Officer and Director 
  PAMELA D.A. REEVE        (Principal Executive Officer)

 
/S/ WILLIAM G. BROWN     Chief Financial Officer,             November 6, 1997
- ---------------------      Vice President of Finance 
  WILLIAM G. BROWN         and Administration and Treasurer
                           (Principal Financial and 
                           Accounting Officer)


/S/ ANDREW I. FILLAT     Director                             November 6, 1997
- ---------------------
ANDREW I. FILLAT
 
/S/ TORRENCE C. HARDER   Director                             November 6, 1997
- ---------------------                                         
TORRENCE C. HARDER                                            
                                                              
/S/ DOUGLAS A. KINGSLEY  Director                             November 6, 1997
- ---------------------                                         
DOUGLAS A. KINGSLEY                                           
                                                              
/S/ D. QUINN MILLS       Director                             November 6, 1997
- ---------------------
D. QUINN MILLS

                                      II-4
<PAGE>
 
                                 EXHIBIT INDEX


Exhibit No.    Description
- -----------    -----------

   4.1/*/      Specimen certificate for the Common Stock
   5.1         Opinion of Foley, Hoag & Eliot LLP 
  10.1         Coral Systems, Inc. Amended and Restated Stock Option Plan
  23.1         Consent of Deloitte & Touche LLP
  23.2         Consent of Foley, Hoag & Eliot LLP (included in Exhibit 5.1)
  24.1         Power of Attorney (contained on the signature page)
- --------------
/*/  Filed as an exhibit to the Company's Registration Statement on Form S-1
     (file number 333-6589), as declared effective by the Commission on
     September 25, 1996 and incorporated herein by reference.

<PAGE>
 
                                                                     EXHIBIT 5.1

                            FOLEY, HOAG & ELIOT LLP
                            One Post Office Square
                       Boston, Massachusetts  02109-2170
                          Telephone:  (617) 832-1000
                          Facsimile:  (617) 832-7000
                                 Telex 940693
                              http://www.fhe.com



                                  November 7, 1997



LIGHTBRIDGE, INC.
281 Winter Street
Waltham, Massachusetts  02154

Ladies and Gentlemen:

     We have acted as counsel for Lightbridge, Inc., a Delaware corporation (the
"Company"), in connection with the preparation and filing with the Securities
and Exchange Commission under the Securities Act of 1933, as amended, of a
Registration Statement on Form S-8 (the "Registration Statement") relating to
the offering of up to 70,000 shares of the Company's common stock, $.01 par
value ("Common Stock"), issuable under options currently issued and outstanding
(the "Options") pursuant to the Coral Systems, Inc. Amended and Restated Stock
Option Plan (the "Plan").

     Pursuant to an Agreement and Plan of Reorganization dated as of September
9, 1997 among the Company, SeeCross Acquisition Corp. and Coral Systems, Inc.
(the "Reorganization Agreement"), all of the Options, which previously were
exercisable (subject to vesting in accordance with the terms thereof) to
purchase shares of common stock of Coral Systems, Inc., were assumed by the
Company and are now exercisable (subject to such vesting) to purchase shares of
Common Stock. The number of shares of Common Stock that will actually be
issuable upon exercises of the Options remains subject to adjustment, based upon
certain determinations to be made after the date hereof in accordance with the
terms of the reorganization Agreement. The shares of Common Stock issuable upon
exercises of the Options, in the number finally determined pursuant to the terms
of the Reorganization Agreement, are referred to herein as the "Option Shares."

     In arriving at the opinions expressed below, we have examined and relied on
the following documents:

     (i)    the Registration Statement;

     (ii)   the Plan;

     (iii)  an executed copy of the Reorganization Agreement, as amended by 
            Amendment No. 1 thereto dated October 9, 1997 and Amendment No. 2 
            thereto dated November 6, 1997;

     (iv)   the Amended and Restated Certificate of Incorporation of the
            Company;

     (v)    the By-Laws of the Company, as amended as of the date hereof; and

     (vi)   the records of meetings and consents of the Board of Directors and
            stockholders of the Company provided to us by the Company.

In addition, we have examined and relied on the originals or copies certified or
otherwise identified to our satisfaction of all such other records, documents
and instruments of the Company and such other persons, and we have made such
investigations of law, as we have deemed appropriate as a basis for the opinions
expressed below.  We have assumed the genuineness of all signatures and the
authenticity
<PAGE>
 
LIGHTBRIDGE, INC.
November 7, 1997
Page Two




of all documents submitted to us as originals and the conformity to the original
documents of all documents submitted to us as certified or photostatic copies.

   We express no opinion other than as to the laws of the State of Delaware.

   Based upon the foregoing, we are of the opinion that the Company has the
corporate power necessary for the issuance of the Option Shares under the Plan,
as contemplated by the Registration Statement.  The Option Shares have been duly
authorized and, when issued against payment of the agreed consideration therefor
in accordance with the respective exercise prices therefor as described in the
options relating thereto and the Plan, will be validly issued, fully paid and
non-assessable.

   We consent to the filing of this opinion as Exhibit 5.1 to the Registration
Statement.

                                  Very truly yours,

                                  FOLEY, HOAG & ELIOT LLP


                                  
                                  By: /s/ Mark L. Johnson
                                    __________________________________
                                    A Partner

<PAGE>
 
                                                                    EXHIBIT 10.1

                              CORAL SYSTEMS, INC.

                    AMENDED AND RESTATED STOCK OPTION PLAN

                            Adopted August 29, 1996

                   Approved by Stockholders __________, 1996



INTRODUCTION

     In October 1992, the Board of Directors adopted the Coral Systems Inc.
Stock Option Plan, which was amended and restated to read as set forth herein on
the date set forth above.

     1.   PURPOSES.

          (a)     The purpose of the Plan is to provide a means by which
selected Employees and Directors and Consultants may be given an opportunity to
benefit from increases in value of the common stock of the Company ("Common
Stock") through the granting of Incentive Stock Options and Nonstatutory Stock
Options.

          (b)     The Company, by means of the Plan, seeks to retain the
services of persons who are now Employees or Directors of or Consultants to the
Company and its Affiliates, to secure and retain the services of new Employees,
Directors and Consultants, and to provide incentives for such persons to exert
maximum efforts for the success of the Company and its Affiliates.

          (c)     The Company intends that the Options issued under the Plan
shall, in the discretion of the Board or any Committee to which responsibility
for administration of the Plan has been delegated, be either Incentive Stock
Options or Nonstatutory Stock Options, and shall be separately designated as
such at the time of grant, and shall be in such form as issued pursuant to
Section 6, and a separate certificate or certificates will be issued for shares
purchased on exercise of each type of Option.

     2.   DEFINITIONS.

          (a)     "Affiliate" means any parent corporation or subsidiary
corporation, whether now or hereafter existing, as those terms are defined in
Sections 424(e) and (f), respectively, of the Code.

          (b)     "Board" means the Board of Directors of the Company.

          (c)     "Code" means the Internal Revenue Code of 1986, as amended.

          (d)     "Committee" means a Committee appointed by the Board in
accordance with subsection 3(c) of the Plan.

          (e)     "Company" means Coral Systems Inc., a Delaware corporation.
<PAGE>
 
          (f)     "Consultant" means any person, including an advisor, engaged
by the Company or an Affiliate to render consulting services and who is
compensated for such services, provided that the term "Consultant" shall not
include Directors who are paid only a director's fee by the Company or who are
not compensated by the Company for their services as Directors.

          (g)     "Continuous Status as an Employee, Director or Consultant"
means the employment or relationship as a Director or Consultant is not
interrupted or terminated. The Board, in its sole discretion, may determine
whether Continuous Status as an Employee, Director or Consultant shall be
considered interrupted in the case of: (i) any leave of absence approved by the
Board, including sick leave, military leave, or any other personal leave; or
(ii) transfers between locations of the Company or between the Company,
Affiliates or their successors.

          (h)     "Director" means a member of the Board.

          (i)     "Employee" means any person, including Officers and Directors,
employed by the Company or any Affiliate of the Company.  Neither service as a
Director nor payment of a director's fee by the Company shall be sufficient to
constitute "employment" by the Company.

          (j)     "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

          (k)     "Fair Market Value" means, as of any date, the value of the
Common Stock of the Company determined as follows:

               (i)  If the Common Stock is listed on any established stock
     exchange, or traded on the Nasdaq National Market or the Nasdaq SmallCap
     Market, the Fair Market Value of a share of Common Stock shall be the
     closing sales price for such stock (or the closing bid, if no sales were
     reported) as quoted on such exchange or market (or the exchange or market
     with the greatest volume of trading in Common Stock) on the last market
     trading day prior to the day of determination, as reported in the Wall
     Street Journal or such other source as the Board deems reliable;

               (ii) In the absence of such markets for the Common Stock, the
     Fair Market Value shall be determined in good faith by the Board.

          (l)     "Incentive Stock Option" means an Option intended to qualify
as an incentive stock option with the meaning of Section 422 of the Code and the
regulations promulgated thereunder.

          (m)     "Non-Employee Director" means a Director who either (i) is not
a current Employee or Officer of the Company or its parent or subsidiary, does
not receive compensation (directly or indirectly) from the Company or its parent
or subsidiary for services rendered as a consultant or in any capacity other
than as a Director (except for an amount as to which disclosure would not be
required under Item 404(a) of Regulation S-K promulgated pursuant to the
Securities Act of 1933 ("Regulation S-K"), does not possess an interest in any
other transaction as to which disclosure would be required under Item 404(a) of
Regulation S-K, and is not engaged in a business

                                       2
<PAGE>
 
relationship as to which disclosure would be required under Item 404(b) of
Regulation S-K; or (ii) is otherwise considered a "non-employee director" for
purposes of Rule 16b-3.

          (n)     "Nonstatutory Stock Option" means an Option not intended to
qualify as an Incentive Stock Option.

          (o)     "Officer" means a person who is an officer of the Company
within the meaning of Section 16 of the Exchange Act and the rules and
regulations promulgated thereunder.

          (p)     "Option" means a stock option granted pursuant to the Plan.

          (q)     "Option Agreement" means a written agreement between the
Company and an Optionee evidencing the terms and conditions of an individual
Option grant. Each Option Agreement shall be subject to the terms and conditions
of the Plan.

          (r)     "Optionee" means a person to whom an Option is granted
pursuant to the Plan.

          (s)     "Outside Director" means a Director who either (i) is not a
current employee of the Company or an "affiliated corporation" (within the
meaning of Treasury regulations promulgated under Section 162(m) of the Code),
is not a former employee of the Company or an "affiliated corporation" receiving
compensation for prior services (other than benefits under a tax qualified
pension plan), was not an officer of the Company or an "affiliated corporation"
at any time, and is not currently receiving direct or indirect remuneration from
the Company or an "affiliated corporation" for services in any capacity other
than as a Director, or (ii) is otherwise considered an "outside director" for
purposes of Section 162(m) of the Code.

          (t)     "Plan" means as Amended and Restated Coral Systems Inc. Stock
Option Plan.

          (u)     "Rule 16b-3" means Rule 16b-3 of the Exchange Act or any
successor to Rule 16b-3, as in effect when discretion is being exercised with
respect to the Plan.

          (v)     "Stock Option Agreement" means a written agreement between the
Company and a holder of an Option evidencing the terms and conditions of an
individual Option.  Each Stock Option Agreement shall be subject to the terms
and conditions of the Plan.

     3.   ADMINISTRATION.

          (a)     The Plan shall be administered by the Board unless and until
the Board delegates administration to a Committee, as provided in subsection
3(c).

          (b)     The Board shall have the power, subject to, and within the
limitations of, the express provisions of the Plan:

               (i)  To determine from time to  time  which  of  the  persons
     eligible under the Plan shall be granted Options; when and how each Option
     shall be granted; whether an Option will be an Incentive Stock Option or a
     Nonstatutory Stock Option; the provisions of each Option granted (which
     need not be identical), including, the time or times when a person shall

                                       3
<PAGE>
 
     be permitted to receive stock pursuant to an Option and the number of
     shares with respect to which an Option shall be granted to each such
     person.

               (ii)  To construe and interpret the Plan and Options granted
     under it, and to establish, amend and revoke rules and regulations for its
     administration. The Board, in the exercise of this power, may correct any
     defect, omission or inconsistency in the Plan or in any Stock Option
     Agreement, in a manner and to the extent it shall deem necessary or
     expedient to make the Plan fully effective.

               (iii)  To amend the Plan or an Option as provided in Section 12.

               (iv)  Generally, to exercise such powers and to perform such acts
     as the Board deems necessary or expedient to promote the best interests of
     the Company which are not in conflict with the provisions of the Plan.

          (c)     The Board may delegate administration of the Plan to a
committee or committees ("Committee") of one or more persons. In the discretion
of the Board, a Committee may consist solely of two or more Outside Directors,
in accordance with Code Section 162(m), or solely of two or more Non-Employee
Directors, in accordance with Rule 16(b)-3. If administration is delegated to a
Committee, the Committee shall have, in connection with the administration of
the Plan, the powers theretofore possessed by the Board (and references in this
Plan to the Board shall thereafter be to the Committee), subject, however, to
such resolutions, not inconsistent with the provisions of the Plan, as may be
adopted from time to time by the Board. The Board may abolish the Committee at
any time and revest in the Board the administration of the Plan.

     4.   SHARES SUBJECT TO THE PLAN.

          (a)     Subject to the provisions of Section 11 relating to
adjustments upon changes in stock, the stock that may be issued pursuant to
Stock Options shall not exceed in the aggregate four million one hundred
seventy-eight thousand three hundred seventy-eight (4,178,378) shares of the
Common Stock. If any Option shall for any reason expire or otherwise terminate,
in whole or in part, without having been exercised in full, the stock not
acquired under such Option shall revert to and again become available for
issuance under the Plan.

          (b)     The stock subject to the Plan may be unissued shares or
reacquired shares, bought on the market or otherwise.

     5.   ELIGIBILITY.

          (a)     Incentive Stock Options may be granted only to Employees.
Options other than Incentive Stock Options may be granted only to Employees,
Directors or Consultants.

          (b)     No person shall be eligible for the grant of an Incentive
Stock Option if, at the time of grant, such person owns (or is deemed to own
pursuant to Section 424(d) of the Code) stock possessing more than ten percent
(10%) of the total combined voting power of all classes of stock of the Company
or of any of its Affiliates unless the exercise price of such Option is at least
one hundred

                                       4
<PAGE>
 
ten percent (110%) of the Fair Market Value of such stock at the date of grant
and the Option is not exercisable after the expiration of five (5) years from
the date of grant.

          (c)     Subject to the provisions of Section 11 relating to
adjustments upon chances in stock, no person shall be eligible to be granted
Options covering, more than one million (1,000,000) shares of the Common Stock
in any calendar year. This subsection 5(c) shall not apply until (1) the
earliest of: (A) the first material modification of the Plan (including any
increase to the number of shares reserved for issuance under the Plan in
accordance with Section 4); (B) the issuance of all of the shares of Common
Stock reserved for issuance under the Plan; (C) the expiration of the Plan; or
(D) the first meeting of stockholders at which directors are to be elected that
occurs after the close of the third calendar year following the calendar year in
which occurred the first registration of an equity security under Section 12 of
the Exchange Act; or (ii) such other date required by Section 162(m) of the Code
and the rules and regulations promulgated thereunder.

     6.   OPTION PROVISIONS. 

          Each Option shall be in such form and shall contain such terms and
conditions as the Board shall deem appropriate. The provisions of separate
Options need not be identical, but each Option shall include (through
incorporation of provisions hereof by reference in the Option or otherwise) the
substance of each of the following provisions:

          (a)     TERM. No Option shall be exercisable after the expiration of
ten (10) years from the date it was granted.

          (b)     PRICE. The exercise price of each Incentive Stock Option shall
be not less than one hundred percent (100%) of the Fair Market Value of the
stock subject to the Option on the date the Option is granted and the exercise
price of each Nonstatutory Stock Option shall be not less than eighty-five
percent (85%) of the Fair Market Value of the stock subject to the Option on the
date the Option is granted. Notwithstanding the foregoing, an Option may be
granted with an exercise price lower than that set forth in the preceding
sentence if such Option is granted pursuant to an assumption or substitution for
another option in a manner satisfying the provisions of Section 424(a) of the
Code.

          (c)     CONSIDERATION. The purchase price of stock acquired pursuant
to an Option shall be paid, to the extent permitted by applicable statutes and
regulations, either (i) in cash at the time the Option is exercised, or (ii) at
the discretion of the Board or the Committee, at the time of the grant of the
Option, (A) by delivery to the Company of other Common Stock of the Company, (B)
according to a deferred payment or other arrangement (which may include, without
limiting the generality of the foregoing, the use of other Common Stock of the
Company) with the person to whom the Option is granted or to whom the Option is
transferred pursuant to subsection 6(d), or (C) in any other form of legal
consideration that may be acceptable to the Board.

     In the case of any deferred payment arrangement, interest shall be payable
at least annually and shall be charged at the minimum rate of interest necessary
to avoid the treatment as interest, under any applicable provisions of the Code
of any amounts other than amounts stated to be interest under the deferred
payment arrangement.

          (d)     TRANSFERABILITY.  An Incentive Stock Option shall not be
transferable except by will or by the laws of descent and distribution, and
shall be exercisable during the lifetime of the person to whom the Incentive
Stock Option is granted only by such person. A Nonstatutory Stock Option may

                                       5
<PAGE>
 
be transferred to the extent provided in the Option Agreement; provided that if
the Option Agreement does not expressly permit the transfer of a Nonstatutory
Stock Option, the Nonstatutory Stock Option shall not be transferable except by
will, by the laws of descent and distribution or pursuant to a domestic
relations order satisfying the requirements of Rule 16b-3 and shall be
exercisable during the lifetime of the person to whom the Option is granted only
by such person or any transferee pursuant to a domestic relations order.
Notwithstanding the foregoing, the person to whom the Option is granted may, by
delivering a written notice to the Company, in a form satisfactory to the
Company, designate a third party who, in the event of the death of the Optionee,
shall thereafter be entitled to exercise the Option.

          (e)     VESTING. The total number of shares of stock subject to an
Option may, but need not, be allotted in periodic installments (which may, but
need not, be equal). The Option Agreement may provide that from time to time
during each of such installment periods, the Option may become exercisable
("vest") with respect to some or all of the shares allotted to that period, and
may be exercised with respect to some or all of the shares allotted to such
period and/or any prior period as to which the Option became vested but was not
fully exercised. The Option may be subject to such other terms and conditions on
the time or times when it may be exercised (which may be based on performance or
other criteria) as the Board may deem appropriate. The provisions of this
subsection 6(e) are subject to any Option provisions governing the minimum
number of shares as to which an Option may be exercised.

          (f)     TERMINATION OF EMPLOYMENT OR RELATIONSHIP AS A DIRECTOR OR
CONSULTANT. In the event an Optionee's Continuous Status as an Employee,
Director or Consultant terminates (other than upon the Optionee's death or
disability), the Optionee may exercise his or her Option (to the extent that the
Optionee was entitled to exercise it at the date of termination) but only within
such period of time ending on the earlier of (i) the date three (3) months
after the termination of the Optionee's Continuous Status as an Employee,
Director or Consultant (or such longer or shorter period specified in the Option
Agreement), or (ii) the expiration of the term of the Option as set forth in the
Option Agreement.  If, after termination, the Optionee does not exercise his or
her Option within the time specified in the Option Agreement, the Option shall
terminate, and the shares covered by such Option shall revert to and again
become available for issuance under the Plan.

     An Optionee's Option Agreement may also provide that if the exercise of the
Option following the termination of the Optionee's Continuous Status as an
Employee, Director or Consultant (other than upon the Optionee's death or
disability) would result in liability under Section 16(b) of the Exchange Act,
then the Option shall terminate on the earlier of (i) the expiration of the term
of the Option set forth in the Option Agreement, or (ii) the tenth (10th) day
after the last date on which such exercise would result in such liability under
Section 16(b) of the Exchange Act.  Finally, an Optionee's Option Agreement may
also provide that if the exercise of the Option following the termination of the
Optionee's Continuous Status as an Employee.  Director or Consultant (other than
upon the Optionee's death or disability) would be prohibited at any time solely
because the issuance of shares would violate the registration requirements under
the Act, then the Option shall terminate on the earlier of (i) the expiration of
the term of the Option set forth in the first paragraph of this subsection 6(f),
or (ii) the expiration of a period of three (3) months after the termination of
the Optionee's Continuous Status as an Employee.  Director or Consultant during
which the exercise of the Option would not be in violation of such registration
requirements.

                                       6
<PAGE>
 
          (g)     DISABILITY OF OPTIONEE.  In the event an Optionee's Continuous
Status as an Employee, Director or Consultant terminates as a result of the
Optionee's disability, the Optionee may exercise his or her Option (to the
extent that the Optionee was entitled to exercise it at the date of
termination), but only within such period of time ending on the earlier of (i)
the date twelve (12) months following such termination (or such longer or
shorter period specified in the Option Agreement), or (ii) the expiration of the
term of the Option as set forth in the Option Agreement.  If, at the date of
termination, the Optionee is not entitled to exercise his or her entire Option,
the shares covered by the unexercisable portion of the Option shall revert to
and again become available for issuance under the Plan.  If, after termination,
the Optionee does not exercise his or her Option within the time specified
herein, the Option shall terminate, and the shares covered by such Option shall
revert to and again become available for issuance under the Plan.

          (h)     DEATH OF OPTIONEE.  In the event of the death of an Optionee
during, or within a period specified in the Option after the termination of, the
Optionee's Continuous Status as an Employee, Director or Consultant, the Option
may be exercised (to the extent the Optionee was entitled to exercise the Option
at the date of death) by the Optionee's estate, by a person who acquired the
right to exercise the Option by bequest or inheritance or by a person designated
to exercise the option upon the Optionee's death pursuant to subsection 6(d),
but only within the period ending on the earlier of (i) the date twelve (12)
months following the date of death (or such longer or shorter period specified
in the Option Agreement), or (ii) the expiration of the term of such Option as
set forth in the Option Agreement.  If, at the time of death, the Optionee was
not entitled to exercise his or her entire Option, the shares covered by the
unexercisable portion of the Option shall revert to and again become available
for issuance under the Plan.  If, after death, the Option is not exercised
within the time specified herein, the Option shall terminate, and the shares
covered by such Option shall revert to and again become available for issuance
under the Plan.

          (i)     EARLY EXERCISE. The Option may, but need not, include a
provision whereby the Optionee may elect at any time while an Employee, Director
or Consultant to exercise the Option as to any part or all of the shares subject
to the Option prior to the vesting of the Option. Any unvested shares so
purchased may be subject to a repurchase right in favor of the Company or to any
other restriction the Board determines to be appropriate.

          (j)     RE-LOAD OPTIONS. Without in any way limiting the authority of
the Board or Committee to make or not to make grants of Options hereunder, the
Board or Committee shall have the authority (but not an obligation) to include
as part of any Option Agreement a provision entitling the Optionee to a further
Option (a "Re-Load Option") in the event the Optionee exercises the Option
evidenced by the Option agreement, in whole or in part, by surrendering other
shares of Common Stock in accordance with this Plan and the terms and conditions
of the Option Agreement. Any such Re-Load Option (i) shall be for a number of
shares equal to the number of shares surrendered as part or all of the exercise
price of such Option; (ii) shall have an expiration date which is the same as
the expiration date of the Option the exercise of which gave rise to such Re-
Load Option; and (iii) shall have an exercise price which is equal to one
hundred percent (100%) of the Fair Market Value of the Common Stock subject to
the Re-Load Option on the date of exercise of the original Option.
Notwithstanding the foregoing, a Re-Load Option which is an Incentive Stock
Option and which is granted to a 10% stockholder (as described in subsection
5(c)), shall have an exercise price which is equal to one hundred ten percent
(110%) of the Fair Market Value of the stock subject to the Re-Load

                                       7
<PAGE>
 
Option on the date of exercise of the original Option and shall have a term
which is no longer than five (5) years.

     Any such Re-Load Option may be an Incentive Stock Option or a Nonstatutory
Stock Option, as the Board or Committee may designate at the time of the grant
of the original Option; provided, however, that the designation of any Re-Load
Option as an Incentive Stock Option shall be subject to the one hundred thousand
dollars ($100,000) annual limitation on exercisability of Incentive Stock
Options described in subsection 10(d) of the Plan and in Section 422(d) of the
Code.  There shall be no Re-Load Options on a Re-Load Option.  Any such Re-Load
Option shall be subject to the availability of sufficient shares under
subsection 4(a) and shall be subject to such other terms and conditions as the
Board or Committee may determine which are not inconsistent with the express
provisions of the Plan regarding the terms of Options.

     7.   CANCELLATION AND RE-GRANT OF OPTIONS.

          (a)     The Board or the Committee shall have the authority to effect,
at any time and from time to time, (i) the repricing of any outstanding Options
under the Plan and/or (ii) with the consent of any adversely affected holders of
Options, the cancellation of any 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 stock, but having an exercise price per share
not less than eighty-five percent (85%) of the Fair Market Value for a
Nonstatutory Stock Option, one hundred percent (100%) of the Fair Market Value
for an Incentive Stock Option or, in the case of an Incentive Stock Option held
by a 10% stockholder (as described in subsection 5(c)), not less than one
hundred ten percent (110%) of the Fair Market Value per share of stock on the
new grant date. Notwithstanding the foregoing, the Board or the Committee may
grant an Option with an exercise price lower than that set forth above if such
Option is granted as part of a transaction to which Section 424(a) of the Code
applies.

          (b)     Shares subject to an Option canceled under this Section 7
shall continue to be counted against the maximum award of Options permitted to
be granted pursuant to subsection 5(c) of the Plan. The repricing of an Option
under this Section 7, resulting in a reduction of the exercise price, shall be
deemed to be a cancellation of the original Option and the grant of a substitute
Option; in the event of such repricing, both the original and the substituted
Options shall be counted against the maximum awards of Options permitted to be
granted pursuant to subsection 5(c) of the Plan. The provisions of this
subsection 7(b) shall be applicable only to the extent required by Section
162(m) of the Code.

     8.   COVENANTS OF THE COMPANY.

          (a)     During the terms of the Options, the Company shall keep
available at all times the number of shares of stock required to satisfy such
Options.

          (b)     The Company shall seek to obtain from each regulatory
commission or agency having jurisdiction over the Plan such authority as may be
required to issue and sell shares under Options; provided, however, that this
undertaking shall not require the Company to register under the Securities Act
of 1933, as amended (the "Securities Act") either the Plan, any Option or any
stock issued or issuable pursuant to any such Option. If, after reasonable
efforts, the Company is unable to

                                       8
<PAGE>
 
obtain from any such regulatory commission or agency the authority which counsel
for the Company deems necessary for the lawful issuance and sale of stock under
the Plan, the Company shall be relieved from any liability for failure to issue
and sell stock upon exercise of such Options unless and until such authority is
obtained.

     9.   USE OF PROCEEDS FROM STOCK.  

          Proceeds from the sale of stock pursuant to Options shall constitute
general funds of the Company.

     10.  MISCELLANEOUS.

          (a)     The Board shall have the power to accelerate the time at which
an Option may First be exercised or the time during which an Option or any part
thereof will vest, notwithstanding the provisions in the Option stating the time
at which it may first be exercised or the time during which it will vest.

          (b)     Neither an Employee, Director nor a Consultant nor any person
to whom an Option is transferred in accordance with the Plan shall be deemed to
be the holder of, or to have any of the rights of a holder with respect to, any
shares subject to such Option unless and until such person has satisfied all
requirements for exercise of the Option pursuant to its terms.

          (c)     Nothing in the Plan or any instrument executed or Option
granted pursuant thereto shall confer upon any Employee, Consultant or other
holder of Options any right to continue in the employ of the Company or any
Affiliate or to continue serving as a Consultant and Director, or shall affect
the right of the Company or any Affiliate to terminate the employment of any
Employee with or without notice and with or without cause, or the right to
terminate the relationship of any Consultant pursuant to the terms of such
Consultant's agreement with the Company or Affiliate or service as a Director
pursuant to the Company's By-laws.

          (d)     To the extent that the aggregate Fair Market Value (determined
at the time of grant) of stock with respect to which Incentive Stock Options are
exercisable for the First time by any Optionee during any calendar year under
all plans of the Company and its Affiliates exceeds one hundred thousand dollars
($100,000) the Options or portions thereof which exceed such limit (according to
the order in which they were granted) shall be treated as Nonstatutory Stock
Options.

          (e)     The Company may require any person to whom an Option is
granted, or any person to whom an Option is transferred in accordance with the
Plan, as a condition of exercising or acquiring stock under any Option, (1) to
give written assurances satisfactory to the Company as to such person's
knowledge and experience in financial and business matters and/or to employ a
purchaser representative reasonably satisfactory to the Company who is
knowledgeable and experienced in financial and business matters, and that he or
she is capable of evaluating, alone or together with the purchaser
representative, the merits and risks of exercising the Option; and (2) to give
written assurances satisfactory to the Company stating that such person is
acquiring the stock subject to the Option for such person's own account and not
with any present intention of selling or otherwise distributing the stock. The
foregoing requirements, and any assurances given pursuant to such requirements,
shall be inoperative if (i) the issuance of the shares upon the exercise or
acquisition of stock under the Option has been registered under a then currently
effective registration statement under the Securities Act, or (ii) as to any
particular requirement, a determination is made by counsel for the

                                       9
<PAGE>
 
Company that such requirement need not be met in the circumstances under the
then applicable securities laws. The Company may, upon advice of counsel to the
Company, place legends on stock certificates issued under the Plan as such
counsel deems necessary or appropriate in order to comply with applicable
securities laws, including, but not limited to, legends restricting the transfer
of the stock.

          (f)     To the extent provided by the terms of a Stock Option
Agreement, the person to whom an Option is granted may satisfy any federal,
state or local tax withholding obligation relating to the exercise or
acquisition of stock under an Option by any of the following means or by a
combination of such means: (1) tendering a cash payment; (2) authorizing the
Company to withhold shares from the shares of the Common Stock otherwise
issuable to the participant as a result of the exercise or acquisition of stock
under the Option; or (3) delivering to the Company owned and unencumbered shares
of the Common Stock of the Company.

     11.  ADJUSTMENTS UPON CHANGES IN STOCK.

          (a)     If any change is made in the stock subject to the Plan, or
subject to any Option, without the receipt of consideration by the Company
(through merger, consolidation, reorganization, recapitalization,
reincorporation, stock dividend, dividend in property other than cash, stock
split, liquidating dividend, combination of shares, exchange of shares, change
in corporate structure or other transaction not involving the receipt of
consideration by the Company), the Plan will be appropriately adjusted in the
class(es) and maximum number of shares subject to the Plan pursuant to
subsection 4(a) and the maximum number of shares subject to award to any person
during any calendar year pursuant to subsection 5(d), and the outstanding
Options will be appropriately adjusted in the class(es) and number of shares and
price per share of stock subject to such outstanding Options. Such adjustments
shall be made by the Board or the Committee, the determination of which shall be
final, binding and conclusive. (The conversion of any convertible securities of
the Company shall not be treated as a "transaction not involving the receipt of
consideration of the Company.")

          (b)     In the event of a Change in Control to the extent permitted by
applicable law: (i) any surviving corporation or a parent of such surviving
corporation shall assume any Options outstanding under the Plan or shall
substitute similar Options for those outstanding under the Plan or (ii) such
Options shall continue in full force and effect, unless (iii) the surviving
corporation or parent of the surviving corporation refuses to assume or continue
any Options outstanding under the Plan, or to substitute similar options for
those outstanding under the Plan.

     If, following the consummation of a Change in Control, the surviving
corporation or parent of the surviving corporation refuses to assume or continue
any Options outstanding under the Plan, or to substitute similar options for
those outstanding under the Plan, then the Options held by persons providing
services as Employees, Directors or Consultants immediately prior to the
consummation of the Change in Control, (i) any Company repurchase option with
respect to shares acquired by such person under an Option shall lapse and (ii)
the Options held by such persons shall be fully vested and exercisable, the time
during which such Options may be exercised shall be accelerated, the Optionees
shall be given reasonable opportunity (at least 10 days) to exercise such
Options prior to the consummation of the Change in Control, and such Options
shall be terminated if not exercised prior to the consultation of the Change in
Control.

                                       10
<PAGE>
 
     If, following the consummation of a Change in Control, the surviving
corporation or its parent assumes, substitutes or continues Options outstanding
under the Plan, then: (i) if the Change in Control was not approved by the
Board, with respect to any Optionee who was an Employee, Director or Consultant
immediately prior to the consummation of the Change in Control, 100% of such
Optionees previously unvested Options shall be fully vested and exercisable, and
any Company repurchase option with respect to shares acquired by such person
under an Option shall lapse immediately prior to the consummation of the Change
in Control; and (ii) with respect to an Optionee who was an Employee immediately
prior to the consummation of a Change in Control, if such Optionee's employment
is involuntarily terminated other than for Cause or is voluntarily terminated
for Good Reason within the twelve (12) months following the Change in Control,
then such Optionee's previously unvested Options shall be fully vested and
exercisable, and any Company repurchase option with respect to shares acquired
by such person under an Option shall lapse.

     For purposes of this Plan:

     "Change in Control" means:  (i) a sale of substantially all of the assets
of the Company; (ii) a merger or consolidation in which the Company is not the
surviving corporation (other than a merger or consolidation in which
shareholders immediately before the merger or consolidation have, immediately
after the merger or consolidation, greater stock voting power); (iii) a reverse
merger in which the Company is the surviving corporation but the shares of the
Company's common stock outstanding immediately preceding the merger are
converted by virtue of the merger into other property, whether in the form of
securities, cash or otherwise (other than a reverse merger in which stockholders
immediately before the merger have, immediately after the merger, greater stock
voting power); or (iv) any transaction or series of related transactions in
which in excess of 50% of the Company's voting power is transferred;

     "Cause" means fraud, misappropriation or embezzlement on the part of
Optionee which resulted in material loss, damage or injury to the Company,
Optionee's conviction of a felony involving moral turpitude, or Optionee's gross
neglect of duties; and

     "Good Reason" means a reduction in compensation or a relocation of
Optionee's principal worksite to a location more than 30 miles from Optionee's
pre-Change in Control worksite or, for an executive officer, a material
reduction in responsibilities or authority as in effect before the Change in
Control.

          (c)     In the event of the proposed dissolution or liquidation of the
Company, each outstanding Option shall terminate immediately prior to the
consummation of such proposed action, unless otherwise provided by the Board.

     12.  AMENDMENT OF THE PLAN AND OPTIONS.

          (a)     The Board at any time, and from time to time, may amend the
Plan. However, except as provided in Section 11 relating to adjustments upon
changes in stock, no amendment shall be effective unless approved by the
stockholders of the Company to the extent stockholder approval is necessary for
the Plan to satisfy the requirements of Section 422 of the Code, Rule 16b-3 or
any Nasdaq or securities exchange listing requirements.

                                       11
<PAGE>
 
          (b)     The Board may in its sole discretion submit any other
amendment to the Plan for stockholder approval, including, but not limited to,
amendments to the Plan intended to satisfy the requirements of Section 162(m) of
the Code and the regulations thereunder regarding the exclusion of performance-
based compensation from the limit on corporate deductibility of compensation
paid to certain executive officers.

          (c)     It is expressly contemplated that the Board may amend the Plan
in any respect the Board deems necessary or advisable to provide eligible
Employees, Directors or Consultants with the maximum benefits provided or to be
provided under the provisions of the Code and the regulations promulgated
thereunder relating to Incentive Stock Options and/or to bring the Plan and/or
Incentive Stock Options granted under it into compliance therewith.

          (d)     Rights and obligations under any Option granted before
amendment of the Plan shall not be impaired by any amendment of the Plan unless
(i) the Company requests the consent of the person to whom the Option was
granted and (ii) such person consents in writing.

          (e)     The Board at any time, and from time to time, may amend the
terms of any one or more Options; provided, however, that the rights and
obligations under any Option shall not be impaired by any such amendment unless
(i) the Company requests the consent of the person to whom the Option was
granted and (ii) such person consents in writing.

     13.  TERMINATION OR SUSPENSION OF THE PLAN.

          (a)     The Board may suspend or terminate the Plan at any time.
Unless sooner terminated, the Plan shall terminate ten (10) years from the date
the Plan is adopted by the Board or approved by the stockholders of the Company,
whichever is earlier. No Options may be granted under the Plan while the Plan is
suspended or after it is terminated.

          (b)     Rights and obligations under any Option granted while the Plan
is in effect shall not be impaired by suspension or termination of the Plan,
except with the consent of the person to whom the Option was granted.

     14.  EFFECTIVE DATE OF PLAN. 

          This Amended and Restated Stock Option Plan shall become effective on
the date adopted by the Board, but no Options granted under the Plan after such
adoption may be exercised until the Plan has been approved by the stockholders
of the Company, which approval shall be within twelve (12) months before or
after the date the Plan is adopted by the Board. Following the date this Plan is
approved by the stockholders of the Company, the terms of this Plan shall apply
to outstanding Options granted under the Company's Stock Option Plan.

                                       12

<PAGE>
 
                                                                    EXHIBIT 23.1


                         INDEPENDENT AUDITORS' CONSENT

     We consent to the incorporation by reference in this Registration Statement
of Lightbridge, Inc. on Form S-8 of our report dated February 4, 1997 (except
for Note 2 "Recent Accounting Pronouncement," and Note 4, as to which the dates
are March 5, 1997) appearing in the Annual Report on Form 10-K of Lightbridge,
Inc. for the year ended December 31, 1996.



DELOITTE & TOUCHE LLP

Boston, Massachusetts
November 7, 1997



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