Exhibit 4.3

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE
 NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED, OR OTHERWISE
 TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO RULE 144 OR AN OPINION
 OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL, THAT SUCH REGISTRATION IS NOT
 REQUIRED.

WARRANT TO PURCHASE STOCK

Issuer: Teknowledge Corporation, a Delaware corporation
 (the Company)Number of Shares: 15,000,
 as the same may be from time to time adjusted pursuant to Article 2 hereof.
Class of Stock: Common
Exercise Price: $7.00 per share as the same may be from time to time adjusted pursuant
 to Article 2 hereof.Issue Date: March
 28, 2004 Expiration Date: March 28, 2009

THIS WARRANT CERTIFIES THAT, for the agreed upon value
 of $1.00 and for other good and valuable consideration, BRIDGE BANK, NATIONAL ASSOCIATION (Holder)
 is entitled to purchase the number of fully paid and nonassessable Shares of the Company at the Exercise
 Price per Share set forth, subject to the provisions and upon the terms and conditions set forth in
 this Warrant.

ARTICLE 1         
 EXERCISE.

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| | 1.1 | Method of Exercise. This Warrant is exercisable, in whole or in part, from the first anniversary of the Issue Date hereof through the Expiration Date set forth above. Holder may exercise this Warrant by delivering a duly executed Notice of Exercise, in substantially the form attached as Appendix 1, to the principal office of Company. Unless Holder is exercising the conversion right set forth in Section 1.2, Holder shall also deliver to Company a check for the aggregate Exercise Price for Shares being purchased.
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| | 1.2 | Conversion Right. In lieu of exercising this Warrant as specified in Section 1.1, Holder may from time to time convert this Warrant, in whole or in part, into a number of Shares determined by dividing (a) the aggregate fair market value of Shares or other securities otherwise issuable upon exercise of this Warrant minus the aggregate Exercise Price of such Shares by (b) the fair market value of one Share. The fair market value of Shares shall be determined pursuant to Section 1.3.
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| | 1.3 | Fair Market Value. If the Shares are traded in a public market, the fair market value of the Shares shall be the closing price of the Shares (or the closing price of the Companys stock into which the Shares are convertible) reported for the business day immediately before Holder delivers its Notice of Exercise to the Company. If the Shares are not traded in a public market, the Board of Directors of Company shall determine fair market value in its reasonable good faith judgment. The foregoing notwithstanding, if Holder advises the Board of Directors in writing that Holder disagrees with such determination, then Company and Holder shall promptly agree upon a reputable investment banking firm to undertake such valuation. If the valuation of such investment banking firm is greater than that determined by the Board of Directors, then all fees and expenses of such investment banking firm shall be paid by Company. In all other
circumstances, such fees and expenses shall be paid by Holder.
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| | 1.4 | Delivery of Certificate and New Warrant. Promptly after Holder exercises or converts this Warrant, Company shall deliver to Holder certificates for Shares acquired and, if this Warrant has not been fully exercised or converted and has not expired, a new Warrant representing Shares not so acquired.
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| | 1.5 | Replacement of Warrants. On receipt of evidence reasonably satisfactory to Company of the loss, theft, destruction or mutilation of this Warrant and, in the case of loss, theft or destruction, on delivery of an indemnity agreement reasonably satisfactory in form and amount to Company or, in the case of mutilation, on surrender and cancellation of this Warrant, Company at its expense shall execute and deliver, in lieu of this Warrant, a new warrant of like tenor.
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| | 1.6 | Repurchase on Sale, Merger, or Consolidation of Company. For the purpose of this Warrant, Acquisition means any sale, license, or other disposition of all or substantially all of the assets of Company, or any reorganization, consolidation, or merger of Company where the holders of Companys securities before the transaction beneficially own less than 50% of the outstanding voting securities of the surviving entity after the transaction. Upon the closing of any Acquisition, the successor entity shall assume the obligations of this Warrant, and this Warrant shall be exercisable for the same securities, cash, and property as would be payable for Shares issuable upon exercise of the unexercised portion of this Warrant as if such Shares were outstanding on the record date for the Acquisition and subsequent closing, and the Exercise Price shall be adjusted accordingly; provided that if pursuant to such
Acquisition the entire outstanding class of Shares issuable upon exercise of the unexercised portion of this Warrant are cancelled and the total consideration payable to the holders of such class of Shares consists entirely of cash, then, upon payment to the holder of this Warrant of an amount equal to the amount such holder would receive if such holder held Shares issuable upon exercise of the unexercised portion of this Warrant and such Shares were outstanding on the record date for the Acquisition less the aggregate Exercise Price of such Shares, this Warrant shall be cancelled.
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ARTICLE 2         
 ADJUSTMENTS.

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| | 2.1 | Stock Dividends, Splits, Etc. If Company declares or pays a dividend on its common stock (or Shares if Shares are securities other than common stock) payable in common stock or other securities, subdivides the outstanding common stock into a greater amount of common stock, or, if Shares are securities other than common stock, subdivides Shares in a transaction that increases the amount of common stock into which Shares are convertible, then upon exercise of this Warrant, for each Share acquired, Holder shall receive, without cost to Holder, the total number and kind of securities to which Holder would have been entitled had Holder owned Shares of record as of the date the dividend or subdivision occurred.
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| | 2.2 | Reclassification, Exchange or Substitution. Except in the case of an Acquisition to which Section 1.6 is applicable, upon any reclassification, exchange, substitution, or other event that results in a change of the number and/or class of the securities issuable upon exercise or conversion of this Warrant, Holder shall be entitled to receive, upon exercise or conversion of this Warrant, the number and kind of securities and property that Holder would have received for Shares if this Warrant had been exercised immediately before such reclassification, exchange, substitution, or other event. Company or its successor shall promptly issue to Holder a new Warrant for such new securities or other property. The new Warrant shall provide for adjustments which shall be as nearly equivalent as may be practicable to the adjustments provided for in this Article 2 including, without limitation, adjustments to the Exercise Price and to the
number of securities or property issuable upon exercise of the new Warrant. The provisions of this Section 2.2 shall similarly apply to successive reclassifications, exchanges, substitutions, or other events.
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| | 2.3 | Adjustments for Combinations, Etc. If the outstanding Shares are combined or consolidated, by reclassification or otherwise, into a lesser number of shares, the Exercise Price shall be proportionately increased and the number of Shares as to which this warrant is exercisable shall be proportionately decreased.
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| | 2.4 | Adjustments for Diluting Issuances. The Exercise Price and the number of Shares issuable upon exercise of this Warrant or, if Shares are Preferred Stock, the number of shares of common stock issuable upon conversion of Shares, shall be subject to adjustment, from time to time in the manner set forth on Exhibit A in the event of Diluting Issuances (as defined on Exhibit A).
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| | 2.5 | No Impairment. Company shall not, by amendment of its Articles/Certificate of Incorporation or through a reorganization, transfer of assets, consolidation, merger, dissolution, issue, or sale of securities or any other voluntary action, avoid or seek to avoid the observance or performance of any of the terms to be observed or performed under this Warrant by Company, but shall at all times in good faith assist in carrying out of all the provisions of this Article 2 and in taking all such action as may be necessary or appropriate to protect Holders rights under this Article against impairment. If Company takes any dilutive action affecting Shares or its common stock other than as described above that adversely affects Holders rights under this Warrant, the Exercise Price shall be adjusted downward and the number of Shares issuable upon exercise of this Warrant shall be adjusted upward in such a manner that such dilutive
action is offset and the aggregate Exercise Price of this Warrant is unchanged.
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| | 2.6 | Fractional Shares. No fractional Shares shall be issuable upon exercise or conversion of the Warrant and the number of Shares to be issued shall be rounded down to the nearest whole Share. If a fractional share interest arises upon any exercise or conversion of the Warrant, Company shall eliminate such fractional share interest by paying Holder an amount computed by multiplying the fractional interest by the fair market value of a full Share.
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| | 2.7 | Certificate as to Adjustments. Upon each adjustment of the Exercise Price, Company at its expense shall promptly compute such adjustment, and furnish Holder with a certificate of its Chief Financial Officer setting forth such adjustment and the facts upon which such adjustment is based. Company shall, upon written request, furnish Holder a certificate setting forth the Exercise Price in effect upon the date thereof and the series of adjustments leading to such Exercise Price.
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ARTICLE 3         
 COVENANTS OF COMPANY.

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| | 3.1 | Valid Issuance. Company shall take all steps necessary to insure that all Shares which may be issued upon the exercise of this Warrant, and all securities, if any, issuable upon conversion of Shares, shall, upon issuance, be duly authorized, validly issued, fully paid and nonassessable, and free of any liens and encumbrances except for restrictions on transfer provided for herein or under applicable federal and state securities laws.
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| | 3.2 | Notice of Certain Events. If Company proposes at any time (a) to declare any dividend or distribution upon its common stock, whether in cash, property, stock, or other securities and whether or not a regular cash dividend; (b) to offer for subscription pro rata to the holders of any class or series of its stock any additional shares of stock of any class or series or other rights; (c) to effect any reclassification or recapitalization of common stock; (d) to merge or consolidate with or into any other corporation, or sell, lease, license, or convey all or substantially all of its assets, or to liquidate, dissolve or wind up; or (e) offer holders of registration rights the opportunity to participate in an underwritten public offering of the Companys securities for cash, then, in connection with each such event, Company shall give Holder (1) in the case of the matters referred to in (a) and (b)
above  at least 20 days prior written notice of the date on which a record will be taken for such dividend, distribution, or subscription rights (and specifying the date on which the holders of common stock will be entitled thereto) or for determining rights to vote, if any, in respect of the matters referred to in (c) and (d) above; (2) in the case of the matters referred to in (c) and (d) above at least 20 days prior written notice of the date when the same will take place (and specifying the date on which the holders of common stock will be entitled to exchange their common stock for securities or other property deliverable upon the occurrence of such event); and (3) in the case of the matter referred to in (e) above, the same notice as is given to the holders of such registration rights.
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| | 3.3 | Information. So long as the Holder holds this Warrant and/or any of the Shares, Company shall deliver to Holder (a) promptly, copies of all notices or other written communications to which Holder would be entitled if it held Shares as to which this Warrant was then exercisable and (b) such other financial statements required under and in accordance with any loan documents between Holder and Company, or if there are no such requirements or if the subject loan(s) are no longer are outstanding, then within 45 days after the end of each of the first three quarters of each fiscal year, Companys quarterly, unaudited financial statements and within 90 days after the end of each fiscal year, Companys annual, audited financial statements.
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| | 3.4 | Notice of Expiration. Company shall give Holder written notice of Holders right to exercise this Warrant in the form attached as Appendix 2 not more than 90 days and not less than 15 days before the Expiration Date and, in the case of an Acquisition to which the proviso of Section 1.6 shall be applicable, 15 days notice of such Acquisition. If the notice is not so given, the Expiration Date shall automatically be extended until 15 days after the date Company delivers the notice to Holder.
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| | 3.5 | Registration Rights. The common stock issuable upon conversion of Shares, shall have the same piggyback registration rights as are set forth in the Investor Rights Agreement, dated as of [__________], between Company and its investors, as from time to time in effect (the Investor Rights Agreement  a true copy of which as in effect on the date hereof has been furnished by Company to Holder). Company agrees that no amendments will be made to the Investor Rights Agreement which would have an adverse impact on Holders registration rights thereunder.
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ARTICLE 4         
 MISCELLANEOUS.

| | 4.1 | Legends. This Warrant and the Shares (and the securities issuable, directly or indirectly, upon conversion of Shares, if any) shall be imprinted with a legend in substantially the following form:
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THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES
 ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE
 REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY
 TO COMPANY AND ITS COUNSEL THAT SUCH REGISTRATION IS NOT REQUIRED.

| | 4.2 | Compliance with Securities Laws on Transfer. This Warrant and the Shares issuable upon exercise of this Warrant (and the securities issuable, directly or indirectly, upon conversion of Shares, if any) may not be transferred or assigned in whole or in part without compliance with applicable federal and state securities laws by the transferor and the transferee (including, without limitation, the delivery of investment representation letters and legal opinions reasonably satisfactory to Company, as reasonably requested by Company). Company shall not require Holder to provide an opinion of counsel if the transfer is to an affiliate of Holder or if there is no material question as to the availability of current information as referenced in Rule 144(c), Holder represents that it has complied with Rule 144(d) and (e) in reasonable detail, the selling broker represents that it has complied with Rule 144(f), and the
Company is provided with a copy of Holders notice of proposed sale.
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| | 4.3 | Transfer Procedure. Subject to the provisions of Section 4.3 Holder may transfer all or part of this Warrant or the Shares issuable upon exercise of this Warrant (or the securities issuable, directly or indirectly, upon conversion of Shares, if any) at any time to [__________________], or to any other transferee acceptable to Company (which acceptance shall not be unreasonably withheld or delayed) by giving Company notice of the portion of the Warrant being transferred setting forth the name, address and taxpayer identification number of the transferee and surrendering this Warrant to Company for reissuance to the transferee(s) (and Holder if applicable). Unless Company is filing financial information with the SEC pursuant to the Securities Exchange Act of 1934, Company shall have the right to refuse to transfer any portion of this Warrant to any person who directly competes with Company.
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| | 4.4 | Notices. All notices and other communications from Company to Holder, or vice versa, shall be in writing and shall be deemed delivered and effective when given personally or mailed by first-class registered or certified mail, postage prepaid, or by overnight courier, at such address as may have been furnished to Company or Holder, as the case may be, in writing by Company or such Holder from time to time.
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| | 4.5 | Attorneys Fees. In the event of any dispute between the parties concerning the terms and provisions of this Warrant, the party prevailing in such dispute shall be entitled to collect from the other party all costs incurred in such dispute, including reasonable attorneys fees.
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| | 4.6 | Governing Law. This Warrant shall be governed by and construed in accordance with the laws of the State of California, without giving effect to its principles regarding conflicts of law.
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IN
 WITNESS WHEREOF, Company has caused this Warrant to be duly executed by its authorized officers, all
 as of the day and year first above written.

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| |  |                                               
| |  | COMPANY:                                      
| |  | TEKNOWLEDGE CORPORATON, a Delaware corporation
| |  |                                               

| |  |       
| |  | ------
| |  |       
| |  | By:   
| |  | Name: 
| |  | Title:

| |  |       
| |  | ------
| |  |       
| |  | By:   
| |  | Name: 
| |  | Title:

APPENDIX 1

Notice of Exercise

[Strike paragraph that does not apply.]

The
 undersigned hereby elects to purchase shares of the Common/Series ______ Preferred [strike one] Stock
 of __________________________pursuant to the terms of the attached Warrant, and tenders herewith payment
 of the purchase price of such shares in full.

The
 undersigned hereby elects to convert the attached Warrant into Shares/cash [strike one] in the manner
 specified in the Warrant. This conversion is exercised with respect to _____________________ of the
 Shares covered by the Warrant.

Please
 issue a certificate or certificates representing said shares in the name of the undersigned or in such
 other name as is specified below:

|         |  | 
|-------- |  | 
|         |  | 
|Name:    |  | 
|Address: |  | 
|         |  | 

The
 undersigned represents it is acquiring the shares solely for its own account and not as a nominee for
 any other party and not with a view toward the resale or distribution thereof except in compliance with
 applicable securities laws.

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| |  |            
| |  | (Signature)
| |  |            
| |  | (Date)     

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APPENDIX 2

Notice that Warrant Is About to Expire

[Insert Date of Notice]

Issuer:

Issue Date:

Class of Security Issuable:

Exercise Price per Share:

Number of Shares Issuable:

Procedure for Exercise:

| |  |                 
| |  | ----------------
| |  |                 
| |  | (Name of Issuer)
| |  | By              
| |  | Its:            

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EXHIBIT AAnti-Dilution Provisions
(For
 Common Stock Warrants WhereAnti-Dilution
 Protection is Inadequate or Non-existent)

In
 the event of the issuance (a Diluting Issuance) by Company, after the Issue Date of the Warrant, of
 Common Stock (or options or other rights to subscribe thereto or securities convertible into or exchangeable
 for Common Stock) at a price per share less than the Exercise Price or less than the fair market value
 of the Common Stock at the date of such issuance, then the number of Shares issuable upon exercise of
 the Warrant and the Exercise Price, shall be adjusted as a result of Diluting Issuances in accordance
 with the following (provided that under no circumstances shall the aggregate Exercise Price payable
 by Holder upon exercise of the Warrant increase as a result of any adjustment arising from a Diluting
 Issuance):

| | (i)        the total amount, if any, received or receivable by Company for the Issue of the Options or Convertible Securities, plus the minimum amount of additional consideration (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such consideration) payable to Company upon exercise of the Options or conversion of the Convertible Securities, by
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| | (ii)the maximum amount of common stock (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such number) ultimately Issuable upon the exercise of such Options or the conversion of such Convertible Securities.
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