Exhibit 4.2 THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT") OR ANY OTHER APPLICABLE STATE SECURITIES LAWS AND HAS BEEN ISSUED IN RELIANCE UPON REGULATION D PROMULGATED UNDER THE SECURITIES ACT. THIS WARRANT SHALL NOT CONSTITUTE AN OFFER TO SELL NOR A SOLICITATION OF AN OFFER TO BUY THE WARRANT IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION WOULD BE UNLAWFUL. THIS WARRANT MAY NOT BE SOLD, PLEDGED, TRANSFERRED OR ASSIGNED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT AND UNDER APPLICABLE STATE SECURITIES LAWS, OR IN A TRANSACTION WHICH IS EXEMPT FROM REGISTRATION UNDER THE PROVISIONS OF THE SECURITIES ACT AND UNDER PROVISIONS OF APPLICABLE STATE SECURITIES LAWS; AND IN THE CASE OF AN EXEMPTION, ONLY IF THE COMPANY HAS RECEIVED AN OPINION OF COUNSEL THAT SUCH TRANSACTION DOES NOT REQUIRE REGISTRATION OF THE WARRANT, WHICH OPINION AND WHICH COUNSEL SHALL BE SATISFACTORY TO THE COMPANY IN ITS SOLE DISCRETION. No. __ WARRANT A To Purchase ______ Shares of Common Stock of XYBERNAUT CORPORATION THIS CERTIFIES that, for value received, _____________________ (the "Investor"), is entitled, upon the terms and subject to the conditions hereinafter set forth, at any time on or after October 15, 1998 and on or prior to October 15, 2003 (the "Termination Date") but not thereafter, to subscribe for and purchase from XYBERNAUT CORPORATION, a corporation incorporated in the State of Delaware (the "Company"), ____________ ____________ (______) shares (the "Warrant Shares") of Common Stock, par value US $0.01 per share of the Company (the "Common Stock"). The purchase price of one share of Common Stock (the "Exercise Price") under this Warrant shall be equal to $1.76 The Exercise Price and the number of shares for which the Warrant is exercisable shall be subject to adjustment as provided herein. This Warrant is being issued in connection with the Private Equity Line Of Credit Agreement dated on or about April 13, 1998 (the "Agreement"), and is subject to its terms and conditions. In the event of any conflict between the terms of this Warrant and the Agreement, the Agreement shall control. 1. Title of Warrant. Prior to the expiration hereof and subject to compliance with applicable laws, this Warrant and all rights hereunder are transferable, in whole or in part, at the office or agency of the Company by the holder hereof in person or by duly authorized attorney, upon surrender of this Warrant together with the Assignment Form annexed hereto properly endorsed. 2. Authorization of Shares. The Company covenants that all shares of Common Stock which may be issued upon the exercise of rights represented by this Warrant will, upon exercise of the rights represented by this Warrant, be duly authorized, validly issued, fully paid and nonassessable and free from all taxes, liens and charges in respect of the issue thereof (other than taxes in respect of any transfer occurring contemporaneously with such issue). Exercise of Warrant. Except as provided in Section 4 below, exercise of the purchase rights represented by this Warrant may be made at any time or times, before the close of business on the Termination Date, or such earlier date on which this Warrant may terminate as provided in this Warrant, by the surrender of this Warrant and the Notice of Exercise Form annexed hereto duly executed, at the office of the Company (or such other office or agency of the Company as it may designate by notice in writing to the registered holder hereof at the address of such holder appearing on the books of the Company) and upon payment of the Exercise Price of the shares thereby purchased; whereupon the holder of this Warrant shall be entitled to receive a certificate for the number of shares of Common Stock so purchased. Certificates for shares purchased hereunder shall be delivered to the holder hereof within three (3) business days after the date on which this Warrant shall have been exercised as aforesaid. Payment of the Exercise Price of the shares may be by certified check or cashier's check or by wire transfer to an account designated by the Company in an amount equal to the Exercise Price multiplied by the number of Warrant Shares. 4. No Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this Warrant. 5. Charges, Taxes and Expenses. Issuance of certificates for shares of Common Stock upon the exercise of this Warrant shall be made without charge to the holder hereof for any issue or transfer tax or other incidental expense in respect of the issuance of such certificate, all of which taxes and expenses shall be paid by the Company, and such certificates shall be issued in the name of the holder of this Warrant or in such name or names as may be directed by the holder of this Warrant; provided, however, that in the event certificates for shares of Common Stock are to be issued in a name other than the name of the holder of this Warrant, this Warrant when surrendered for exercise shall be accompanied by the Assignment Form attached hereto duly executed by the holder hereof; and provided further, that upon any transfer involved in the issuance or delivery of any certificates for shares of Common Stock, the Company may require, as a condition thereto, the payment of a sum sufficient to reimburse it for any transfer tax incidental thereto. 2 6. Closing of Books. The Company will not close its shareholder books or records in any manner which prevents the timely exercise of this Warrant for a period of time in excess of five (5) trading days per year. 7. No Rights as Shareholder until Exercise. This Warrant does not entitle the holder hereof to any voting rights or other rights as a shareholder of the Company prior to the exercise thereof. Upon the surrender of this Warrant and the payment of the aggregate Exercise Price, the Warrant Shares so purchased shall be and be deemed to be issued to such holder as the record owner of such shares as of the close of business on the later of the date of such surrender or payment. 8. Assignment and Transfer of Warrant. This Warrant may be assigned by the surrender of this Warrant and the Assignment Form annexed hereto duly executed at the office of the Company (or such other office or agency of the Company as it may designate by notice in writing to the registered holder hereof at the address of such holder appearing on the books of the Company). 9. Loss, Theft, Destruction or Mutilation of Warrant. The Company represents and warrants that upon receipt by the Company of evidence reasonably satisfactory to it of the loss, theft, destruction or mutilation of this Warrant certificate or any stock certificate relating to the Warrant Shares, and in case of loss, theft or destruction, of indemnity or security reasonably satisfactory to it, and upon surrender and cancellation of such Warrant or stock certificate, if mutilated, the Company will make and deliver a new Warrant or stock certificate of like tenor and dated as of such cancellation, in lieu of such Warrant or stock certificate. 10. Saturdays, Sundays, Holidays, etc. If the last or appointed day for the taking of any action or the expiration of any right required or granted herein shall be a Saturday, Sunday or a legal holiday, then such action may be taken or such right may be exercised on the next succeeding day not a legal holiday. 11. Effect of Certain Events. (a) If at any time the Company proposes (i) to sell or otherwise convey all or substantially all of its assets or (ii) to effect a transaction (by merger or otherwise) in which more than 50% of the voting power of the Company is disposed of (collectively, a "Sale or Merger Transaction"), in which the consideration to be received by the Company or its shareholders consists solely of cash, then the Warrant shall terminate if the Warrant has not been exercised by the effective date of such transaction, the Company shall give the holder of this Warrant thirty (30) days' notice of such termination and of the proposed effective date of the transaction. (b) In case the Company shall at any time effect a sale or merger transaction in which the consideration to be received by the Company or its shareholders consists in part of consideration other than cash, the holder of this Warrant shall have the right thereafter to purchase, by exercise of this Warrant and payment of the aggregate Exercise Price in effect immediately prior to such action, the kind and amount of shares and other securities and property which it would have owned or have been entitled to receive after the happening of such transaction had this Warrant been exercised immediately prior thereto. The Company agrees that the Warrant Shares shall be included in the Registration Statement to be filed by the Company pursuant to the Private Equity Line Of Credit Agreement dated as of April 13, 1998. 3 12. Adjustments of Exercise Price and Number of Warrant Shares. The number and kind of securities purchasable upon the exercise of this Warrant and the Exercise Price shall be subject to adjustment from time to time upon the happening of any of the following. In case the Company shall (i) declare or pay a dividend in shares of Common Stock or make a distribution in shares of Common Stock to holders of its outstanding Common Stock, (ii) subdivide its outstanding shares of Common Stock, (iii) combine its outstanding shares of Common Stock into a smaller number of shares of Common Stock or (iv) issue any shares of its capital stock in a reclassification of the Common Stock, then the number of Warrant Shares purchasable upon exercise of this Warrant immediately prior thereto shall be adjusted so that the holder of this Warrant shall be entitled to receive the kind and number of Warrant Shares or other securities of the Company which he would have owned or have been entitled to receive had such Warrant been exercised in advance thereof. Upon each such adjustment of the kind and number of Warrant Shares or other securities of the Company which are purchasable hereunder, the holder of this Warrant shall thereafter be entitled to purchase the number of Warrant Shares or other securities resulting from such adjustment at an Exercise Price per such Warrant Share or other security obtained by multiplying the Exercise Price in effect immediately prior to such adjustment by the number of Warrant Shares purchasable pursuant hereto immediately prior to such adjustment and dividing by the number of Warrant Shares or other securities of the Company resulting from such adjustment. An adjustment made pursuant to this paragraph shall become effective immediately after the effective date of such event retroactive to the record date, if any, for such event. 13. Voluntary Adjustment by the Company. The Company may at any time during the term of this Warrant, reduce the then current Exercise Price to any amount and for any period of time deemed appropriate by the Board of Directors of the Company. 14. Notice of Adjustment. Whenever the number of Warrant Shares or number or kind of securities or other property purchasable upon the exercise of this Warrant or the Exercise Price is adjusted, as herein provided, the Company shall promptly mail by registered or certified mail, return receipt requested, to the holder of this Warrant notice of such adjustment or adjustments setting forth the number of Warrant Shares (and other securities or property) purchasable upon the exercise of this Warrant and the Exercise Price of such Warrant Shares (and other securities or property) after such adjustment, setting forth a brief statement of the facts requiring such adjustment and setting forth the computation by which such adjustment was made. Such notice, in absence of manifest error, shall be conclusive evidence of the correctness of such adjustment. 15. Authorized Shares. The Company covenants that during the period the Warrant is outstanding, it will reserve from its authorized and unissued Common Stock a sufficient number of shares to provide for the issuance of the Warrant Shares upon the exercise of any purchase rights under this Warrant. The Company further covenants that its issuance of this Warrant shall constitute full authority to its officers who are charged with the duty of executing stock certificates to execute and issue the necessary certificates for the Warrant Shares upon the exercise of the purchase rights under this Warrant. The Company will take all such reasonable action as may be necessary to assure that such Warrant Shares may be issued as provided herein without violation of any applicable law or regulation, or of any requirements of the NASDAQ Small Cap Stock Market or any domestic securities exchange upon which the Common Stock may be listed. 16. Call/Forced Exercise. The Company, at its option, may redeem this Warrant for $0.01 per Warrant Share by giving the Holder written notice (the "Call Notice") at any time after the Registration Statement is declared effective, and the closing Bid Price of the Common Stock of the Company is greater than 4 one hundred fifty (150%) percent of the Exercise Price for twenty (20) consecutive Trading Days. To be effective, the Call Notice must be given within three (3) Trading Days after the aforementioned twenty day period. The rights and privileges granted pursuant to this Warrant shall terminate thirty (30) days after the Call Notice is sent to the Holder if the warrant is not exercised during that period. In the event the Warrants are not exercised during this period the Company will remit to the Holder $0.01 per Warrant Share upon the Holder tendering to the Company the expired Warrant certificate. 17. Miscellaneous. (a) Issue Date; Jurisdiction. The provisions of this Warrant shall be construed and shall be given effect in all respects as if it had been issued and delivered by the Company on the date hereof. This Warrant shall be binding upon any successors or assigns of the Company. This Warrant shall constitute a contract under the laws of New York without regard to its conflict of law, principles or rules, and be subject to arbitration pursuant to the terms set forth in the Agreement. (b) Restrictions. The holder hereof acknowledges that the Warrant Shares acquired upon the exercise of this Warrant, if not registered, will have restrictions upon resale imposed by state and federal securities laws. Each certificate representing the Warrant Shares issued to the Holder upon exercise will bear the following legend: "THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY OTHER APPLICABLE SECURITIES LAWS AND HAVE BEEN ISSUED IN RELIANCE UPON AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND SUCH OTHER SECURITIES LAWS. NEITHER THIS SECURITY NOR ANY INTEREST OR PARTICIPATION HEREIN MAY BE REOFFERED, SOLD, ASSIGNED, TRANSFERRED, PLEDGED, ENCUMBERED, HYPOTHECATED OR OTHERWISE DISPOSED OF, EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR PURSUANT TO A TRANSACTION THAT IS EXEMPT FROM, OR NOT SUBJECT TO, SUCH REGISTRATION". (c) Modification and Waiver. This Warrant and any provisions hereof may be changed, waived, discharged or terminated only by an instrument in writing signed by the party against which enforcement of the same is sought. (d) Notices. Any notice, request or other document required or permitted to be given or delivered to the holders hereof by the Company shall be delivered or shall be sent by certified or registered mail, postage prepaid, to each such holder at its address as shown on the books of the Company or to the Company at the address set forth in the Agreement. IN WITNESS WHEREOF, the Company has caused this Warrant to be executed by its officer thereunto duly authorized. Dated: April ___, 1998 XYBERNAUT CORPORATION By_________________________ 5 NOTICE OF EXERCISE To: XYBERNAUT CORPORATION (1) The undersigned hereby elects to purchase ________ shares of Common Stock, par value $ per shares (the "Common Stock") of XYBERNAUT CORPORATION pursuant to the terms of the attached Warrant, and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any. (2) Please issue a certificate or certificates representing said shares of Common Stock in the name of the undersigned or in such other name as is specified below: __________________________ (Name) __________________________ (Address) __________________________ (3) The shares of Common Stock being issued in connection with the exercise of the attached Warrant are [not] being issued in connection with the sale of the Common Stock. Dated: __________________________ Signature 1 ASSIGNMENT FORM (To assign the foregoing warrant, execute this form and supply required information. Do not use this form to exercise the warrant.) FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to _______________________________________________ whose address is _________________________________________________________________. _________________________________________________________________ Dated: ______________, 1998 Holder's Signature: _____________________________ Holder's Address: _____________________________ _____________________________ Signature Guaranteed: ___________________________________________ NOTE: The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant, without alteration or enlargement or any change whatsoever, and must be guaranteed by a bank or trust company. Officers of corporations and those acting in an fiduciary or other representative capacity should file proper evidence of authority to assign the foregoing Warrant. 1