XYBERNAUT CORP
S-3, 2000-04-04
COMPUTER COMMUNICATIONS EQUIPMENT
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      As filed with the Securities and Exchange Commission on April 3, 2000
                                                     REGISTRATION NO. 333-______

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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


                              XYBERNAUT CORPORATION
                              ---------------------
             (Exact name of registrant as specified in its charter)


          DELAWARE                                               54-1799851
- -------------------------------                                --------------
(State or other jurisdiction of                               (I.R.S. Employer
Incorporation or organization)                               Identification No.)


                             12701 FAIR LAKES CIRCLE
                             FAIRFAX, VIRGINIA 22033
                                 (703) 631-6925
            ---------------------------------------------------------
               (Address, including zip code, and telephone number,
        Including area code, of registrant's principal executive offices)


                                EDWARD G. NEWMAN
                             12701 FAIR LAKES CIRCLE
                             FAIRFAX, VIRGINIA 22033
                                 (703) 631-6925

            ---------------------------------------------------------
            (Name, address, including zip code, and telephone number,
                   Including area code, of agent for service)

                                    Copy to:

                           Martin Eric Weisberg, Esq.
                       Parker Chapin Flattau & Klimpl, LLP
                             The Chrysler Building
                             405 Lexington Aveneue
                            New York, New York 10036


                                (212) 704-6000

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


         APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO PUBLIC: As soon as
practicable after the effective date of this Registration Statement.

         If the only securities on this Form are being offered pursuant to
dividend or interest reinvestment plans, please check the following box. |_|

         If any of the securities being registered on this Form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, other than securities offered only in connection with
dividend or interest reinvestment plans, check the following box. |X|

         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. |_|

         If this Form is a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. |_|
                                    ---------

         If delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box. |_|


<PAGE>

<TABLE>
<CAPTION>

                         CALCULATION OF REGISTRATION FEE

- ----------------------------------------------------------------------------------------------------------  ---------------
                                                                                            PROPOSED
            TITLE OF EACH CLASS                   AMOUNT TO BE       PROPOSED MAXIMUM        MAXIMUM          AMOUNT OF
       OF SECURITIES TO BE REGISTERED            REGISTERED(1)        OFFERING PRICE        AGGREGATE        REGISTRATION
                                                                        PER SHARE         OFFERING PRICE         FEE
- ----------------------------------------------------------------------------------------------------------  ---------------
<S>                                             <C>                 <C>                <C>                 <C>
Common Stock, $.01 par value per share..            1,000,000 (2)      $17.157 (7)         $17,157,000.00        $4,769.65
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..               647,500(2)      $17.157 (7)         $11,109,157.50        $3,088.35
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..          1,000,000(2)(3)      $17.157 (7)         $17,157,000.00        $4,769.65
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..                 1,996(2)      $17.157 (7)             $34,245.37            $9.52
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..                4,805 (2)      $17.157 (7)             $82,439.39           $22.92
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..           144,000 (2)(4)      $17.157(7)(8)        $2,470,608.00          $686.82
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..             15,000(2)(5)      $17.157 (8)            $257,355.00           $71.54
- ----------------------------------------------------------------------------------------------------------  ---------------
Common Stock, $.01 par value per share..             30,000(2)(6)      $18.000 (8)            $540,000.00          $150.12
- ----------------------------------------------------------------------------------------------------------  ---------------
Total Registration Fee..................                                                                        $13,568.57
- ----------------------------------------------------------------------------------------------------------  ---------------
</TABLE>

(1)  Represents  the shares of common stock being  registered  for resale by the
     selling stockholders.

(2)  Pursuant to Rule 416, the shares of common stock offered hereby also
     include such presently indeterminate number of shares of common stock as
     shall be issued by us to the selling stockholders upon adjustment under
     anti-dilution provisions covering the additional issuance of shares by
     Xybernaut resulting from stock splits, stock dividends or similar
     transactions. We are not registering additional shares of common stock
     which may result from price fluctuations and the operation of exercise
     formulas of the warrants. This presentation is not intended to constitute a
     prediction as to the future market price of the common stock or as to the
     number of shares of common stock issuable upon exercise of the warrants.
     See "Risk Factors -- Dilution"; and "Description of Securities."

(3)  Represents  the  number of shares  issued  upon  exercise  of  warrants  to
     purchase 1,000,000 shares of our common stock.

(4)  Represents the number of shares of common stock issued as compensation for
     marketing services rendered to us and includes 100,000 shares of common
     stock issuable upon exercise of warrants.

(5)  Represents  the number of shares  issuable  upon  exercise  of  warrants to
     purchase 15,000 shares of our common stock.

(6)  Represents  the number of shares  issuable  upon  exercise  of  warrants to
     purchase 30,000 shares of our common stock.

(7)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Rule 457(c) and (g) of the Securities Act of 1933, as amended
     (the "Securities Act"); based on the average ($17.157) of the bid ($17.125)
     and asked ($17.188) price on the Nasdaq SmallCap Market on March 29, 2000.

(8)  Estimated solely for the purpose of calculating the registration fee
     pursuant to Rule 457(g) of the Securities Act, based on the higher of (a)
     the exercise price of the warrants or (b) the offering price of securities
     of the same class included in this registration statement.

THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR DATES
AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL FILE
A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION STATEMENT
SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF THE
SECURITIES ACT OF 1933 OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SECTION 8(A), MAY
DETERMINE.

<PAGE>

The information in this prospectus is not complete. We may not sell these
securities until the registration statement filed with the Securities and
Exchange Commission is effective. This prospectus is not an offer to sell nor is
it seeking an offer to buy these securities in any state where the offer or sale
is not permitted.

                   SUBJECT TO COMPLETION, DATED APRIL __, 2000

PROSPECTUS

                              XYBERNAUT CORPORATION

                        2,843,301 SHARES OF COMMON STOCK

     The stockholders of Xybernaut Corporation listed on page 10 of this
prospectus are offering for sale up to 2,843,301 shares of common stock of
Xybernaut under this prospectus.

     The selling stockholders may offer their shares through public or private
transactions, at prevailing market prices, or at privately negotiated prices.
See "Plan of Distribution."

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

                      NASDAQ SmallCap Market Symbol: "XYBR"

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

     On March 29, 2000, the closing price of one share of our common stock on
the NASDAQ SmallCap Market was $17.25.

     THIS INVESTMENT INVOLVES A HIGH DEGREE OF RISK. YOU SHOULD CAREFULLY
     CONSIDER THE FACTORS DESCRIBED UNDER THE CAPTION "RISK FACTORS" BEGINNING
     ON PAGE 2 OF THIS PROSPECTUS.

     NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
     COMMISSION HAS APPROVED OR DISAPPROVED THESE SECURITIES OR DETERMINED IF
     THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY
     IS A CRIMINAL OFFENSE.

             The date of this prospectus is _________________, 2000


<PAGE>

                                  RISK FACTORS

         BEFORE YOU BUY SHARES OF OUR COMMON STOCK, YOU SHOULD BE AWARE THAT
THERE ARE VARIOUS RISKS ASSOCIATED WITH THAT PURCHASE, INCLUDING THOSE DESCRIBED
BELOW. YOU SHOULD CONSIDER CAREFULLY THESE RISK FACTORS, TOGETHER WITH ALL OF
THE OTHER INFORMATION IN THIS PROSPECTUS AND THE DOCUMENTS WE HAVE INCORPORATED
BY REFERENCE IN THE SECTION "WHERE YOU CAN FIND MORE INFORMATION ABOUT US,"
BEFORE YOU DECIDE TO PURCHASE SHARES OF OUR COMMON STOCK.

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

     RISKS ASSOCIATED WITH OUR HISTORY OF LOSSES AND FUTURE NEED FOR CAPITAL
  -----------------------------------------------------------------------------

WE HAVE A HISTORY OF LOSSES AND, IF WE DO NOT ACHIEVE PROFITABILITY, WE MAY NOT
BE ABLE TO CONTINUE OUR BUSINESS IN THE FUTURE.

         Our research, development, sales, marketing and general and
administrative expenses have resulted in significant losses and are expected to
continue to result in significant losses for the foreseeable future. We have
incurred the following losses since 1994:


                  Fiscal years ended:
                      o  March 31, 1994                              $47,352
                      o  March 31, 1995                           $1,303,892
                      o  December 31, 1996                        $5,238,536
                      o  December 31, 1997                        $9,479,966
                      o  December 31, 1998                       $13,111,488
                      o  December 31, 1999                       $16,775,797

THE "GOING CONCERN" QUALIFICATION ON THE REPORT OF OUR INDEPENDENT ACCOUNTANTS
 MAY REDUCE OUR ABILITY TO RAISE ADDITIONAL FINANCING.

         The report of our independent accountants on our December 31, 1999
consolidated financial statements contains an explanatory paragraph regarding
our ability to continue as a going concern. Our independent accountants cited
our history of operating losses and our need for additional capital as factors
which raised substantial doubt as to our ability to continue as a going concern.
This "going concern" qualification may reduce our ability to raise additional
financing.

WE COULD BE REQUIRED TO CUT BACK OR STOP OPERATIONS IF WE ARE UNABLE TO RAISE OR
OBTAIN NEEDED FINANCING.

         The research, development, commercialization, manufacturing and
marketing of our products will likely require financial resources which are
significantly in excess of those presently available to us. If we are not able
to arrange financing or other third party arrangements on acceptable terms, we
may be unable to fully develop and commercialize any of our products and could
be required to cut back or stop operations.


                                      -2-
<PAGE>

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

             RISKS ASSOCIATED WITH THE INDUSTRY IN WHICH WE OPERATE

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

OUR FUTURE REVENUES AND ABILITY TO PRODUCE NEW PRODUCTS DEPEND SUBSTANTIALLY ON
THE SUCCESS OF THE MOBILE ASSISTANT SERIES(R).

         Our Mobile Assistant(R) Series currently consists of one product, the
MA IVTM. The Mobile Assistant Series is our principal product, and our success
will depend upon its commercial acceptance, which cannot be assured. Additional
product development will result in a significant increase in our research and
development expenses that may be unrecoverable should commercialization of new
products prove unsuccessful. We also could require additional funding if
research and development expenses are greater than we anticipate. As with most
high technology products, new models of the Mobile Assistant Series must be
introduced periodically for the Company to remain competitive. There can be no
assurance that these new models can be successfully developed or commercially
accepted.

WE MAY HAVE TO LOWER PRICES OR SPEND MORE MONEY TO EFFECTIVELY COMPETE AGAINST
COMPANIES WITH GREATER RESOURCES THAN US WHICH COULD RESULT IN LOWER REVENUES
AND/OR PROFITS.

         The success of our products in the marketplace depends on many factors,
including product performance, price, ease of use, support of industry
standards, and customer support and service. Given these factors we cannot
assure you that we will be able to compete successfully. For example, if our
competitors offer lower prices, we could be forced to lower prices which would
result in reduced margins and a decrease in revenues. If we do not lower prices
we could lose sales and market share. In either case, if we are unable to
compete against our main competitors which include established companies like
Computing Devices International, a division of Ceridian Corporation, ViA Inc.,
Texas Microsystems, Telxon, Symbol, Norand, Teltronics, Inc. a subsidiary of
Interactive Solutions, Raytheon, and others, we would not be able to generate
sufficient revenues to grow the company or reverse our history of losses.

         In addition, we may have to spend more money to effectively compete for
market share, including funds to expand our infrastructure, which is a capital
and time extensive process. Further, if other companies want to aggressively
compete against us, we may have to spend more money on advertising, promotion,
trade shows, product development, marketing and overhead expenses, hiring and
retaining personnel, and developing new technologies. These higher expenses
would hurt our net income and profits.

CURRENCY FLUCTUATIONS, ESPECIALLY IN THE JAPANESE YEN, MAY SIGNIFICANTLY
INCREASE OUR EXPENSES AND AFFECT OUR RESULTS OF OPERATIONS.

         The exchange rates for some local currencies in countries where we
operate may fluctuate in relation to the U.S. dollar. Such fluctuations may have
an adverse effect on our expenses, revenues, earnings, assets or liabilities
when local currencies are translated into U.S. dollars. We are party to supplier
arrangements with several companies in Japan, including Shimadzu and Sony
Digital Products for the production of the MA IV system. The fees we pay to
these companies are paid in Japanese Yen. Any strengthening of the value of the
U.S. dollar against the Japanese Yen could

                                      -3-
<PAGE>

result in an increase in our production  expenses which,  if substantial,  could
have a  material  adverse  effect on our  financial  condition  and  results  of
operations.

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

                              RISKS ASSOCIATED WITH
                      OUR INTERNAL OPERATIONS AND POLICIES

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

SINCE WE DO NOT INTEND TO DECLARE DIVIDENDS IN THE FORESEEABLE FUTURE, THE
RETURN ON YOUR INVESTMENT WILL DEPEND UPON APPRECIATION OF THE MARKET PRICE OF
YOUR SHARES.

         We have never paid any dividends on our common stock. Our board of
directors does not intend to declare any dividends in the foreseeable future,
but intends to retain all earnings, if any, for use in our business operations.
As a result, the return on your investment in Xybernaut will depend upon any
appreciation in the market price of the common stock. The holders of common
stock are entitled to receive dividends when, as and if declared by the board of
directors out of funds legally available for dividend payments. The payment of
dividends, if any, in the future is within the discretion of our board of
directors and will depend upon our earnings, capital requirements and financial
condition, and other relevant factors.

OUR COMPUTER SYSTEMS AND THOSE OF OUR CUSTOMERS AND SUPPLIERS MAY NOT RECOGNIZE
THE YEAR 2000 WHICH MAY AFFECT OUR COMPUTER SYSTEMS AND DISRUPT OUR BUSINESS.

         The year 2000 issue is the result of computer programs being written
using two digits rather than four to define the applicable year. Any of our
computer programs that have date-sensitive software may recognize a date using
"00" as the year 1900 rather than the year 2000. This could result in a system
failure or miscalculations causing disruptions of operations, including, a
temporary inability to process transactions, send invoices, or engage in similar
normal business activities.

         We have utilized both internal and external resources to test,
reprogram or replace, as needed, our computing and communications hardware and
software for year 2000 modifications. Based on this evaluation, we have made
modifications to our computer system and determined that these systems will
properly utilize dates beyond December 31, 1999. As such, we are compliant with
the year 2000 issue.

         As a result of the testing, we determined that our old phone system was
not year 2000 compliant. Our phone system was already scheduled for replacement
to add capacity, upgrade the telecommunications capabilities, and allow for
better customer service. In December 1999, we replaced the existing phone system
with one that provides enhanced capabilities and is year 2000 compliant. The
cost to purchase and install the new phone system was approximately $75,000. Our
estimate of the costs to remediate our year 2000 issue related to our telephone
system is based on presently available information. Outside of the phone system,
the cost of testing and modifying our computer systems to obtain year 2000
compliance was less than $10,000 in the aggregate.

         We have contacted all of our significant suppliers and large customers
to determine the possible effect on our operations of their inability or failure
to remediate their own year 2000 Issue. However, we cannot guarantee that the
systems of other companies on which our systems rely will be timely converted,
or that a failure to convert by another company, or a conversion that is
incompatible with our systems, would not have material adverse effect on our
operations. We

                                      -4-
<PAGE>

believe that no exposure to contingencies related to the year 2000 issue for the
products we have sold.

         We noted no significant  product or system failures or  miscalculations
related to the year 2000 issue on or around January 1, 2000.

         Our estimates of the date of completion and cost of our year 2000
project are based on our best estimates, which we derived utilizing numerous
assumptions of future events including the continued availability of certain
resources, third party modification plans and other factors. The costs and
completion date of our year 2000 project could differ materially from our
estimates due to the lack of availability and cost of personnel trained in this
area, our ability to locate and correct all relevant computer codes, and similar
uncertainties.

          ----------------------------------------------------------
               RISKS WHICH MAY DILUTE THE VALUE OF YOUR XYBERNAUT
                SHARES OR LIMIT THE EFFECT OF THEIR VOTING POWER

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


THE PRICE OF OUR COMMON STOCK IS HIGHLY VOLATILE.

         The price of our common stock is highly volatile. During the period
from January 1, 1998 to March 29, 2000 the closing price of our common stock has
ranged from a high of $23.75 to a low of $1.00. Following periods of volatility
in the market price of a company's securities, securities class action
litigation has often been instituted against such a company. If similar
litigation were instituted against us, it could result in substantial costs and
a diversion of our management's attention and resources, which could have an
adverse effect on our business. The volatile fluctuations of the market price
are based on (1) the number of shares in the market at the time as well as the
number of shares we may be required to issue in the future, compared to the
market demand for our shares; (2) our performance and meeting expectations of
our performance, including the development and commercialization of our products
and proposed products; and (3) general economic and market conditions.

OUR EXECUTIVE OFFICERS, DIRECTORS AND PRINCIPAL STOCKHOLDERS, TOGETHER, MAY
EXERCISE CONTROL OVER ALL MATTERS SUBMITTED TO A VOTE OF STOCKHOLDERS.

         As of March 29, 2000, our executive officers, directors and principal
stockholders beneficially owned, in the aggregate, approximately 18% of our
outstanding shares of common stock. These stockholders, if acting together, may
be able to effectively control most matters requiring approval by our
stockholders. The voting power of these stockholders under certain circumstances
could have the effect of delaying or preventing a change in control of
Xybernaut.


                                      -5-
<PAGE>




WE HAVE 5,239,755 SHARES OF OUR COMMON STOCK RESERVED FOR FUTURE ISSUANCES
WHICH CAN SUBSTANTIALLY DILUTE THE VALUE OF YOUR XYBERNAUT COMMON STOCK.

         The issuance of reserved shares would dilute the equity interest of
existing stockholders and could have a significant adverse effect on the market
price of our common stock. As of March 29, 2000, we had 5,239,755 shares of
common stock reserved for possible future issuances upon conversion of
outstanding convertible securities, options and warrants. Certain convertible
securities, options and warrants are convertible into or exercisable for shares
of common stock at discounts from future market prices of the common stock.
Those discounts could result in substantial dilution to existing holders of
common stock. The sale of the common stock acquired at a discount could have a
negative impact on the trading price of the common stock and could increase the
volatility in the trading price of the common stock. See the section entitled
"Dilution" for a summary of the number of shares which could be issued upon
conversion of the outstanding preferred stock at various market prices.

         In addition, we intend to seek additional financing which may result in
the issuance of additional shares of our capital stock and/or rights to acquire
additional shares of our capital stock. Those additional issuances of capital
would result in a reduction of your percentage interest in Xybernaut.

ANTI-TAKEOVER MEASURES IN OUR CERTIFICATE OF INCORPORATION COULD ADVERSELY
AFFECT THE VOTING POWER OF THE HOLDERS OF THE COMMON STOCK.

         Our certificate of incorporation authorizes anti-takeover measures like
the authority to issue "blank check" preferred stock and the staggered terms of
the members of our board of directors. Those measures could have the effect of
delaying, deterring or preventing a change in control without any action by the
shareholders. In addition, issuance of preferred stock, without shareholder
approval, on those terms as the board of directors may determine, could
adversely affect the voting power of the holders of the common stock, including
the loss of voting control to others. See "Description of Securities."

                INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

         This prospectus contains certain forward-looking statements which
involve substantial risks and uncertainties. These forward-looking statements
can generally be identified because the context of the statement includes words
such as "may," "will," "except," "anticipate," "intend," "estimate," "continue,"
"believe," or other similar words. Similarly, statements that describe our
future plans, objectives and goals are also forward-looking statements. Our
factual results, performance or achievements could differ materially from those
expressed or implied in these forward-looking statements as a result of certain
factors, including those listed in "Risk Factors" and elsewhere in this
Prospectus.


                                      -6-
<PAGE>



                  WHERE YOU CAN FIND MORE INFORMATION ABOUT US

         We file annual, quarterly and special reports, proxy statements and
other information with the SEC. You may read and copy any document we file at
the SEC's public reference rooms in Washington, D.C. New York, New York and
Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further information
on the public reference rooms. Our SEC filings are also available to the public
over the Internet at the SEC's Website at "http://www.sec.gov."

         We have filed with the SEC a registration statement on Form S-3 to
register the shares being offered. This prospectus is part of that registration
statement and, as permitted by the SEC's rules, does not contain all the
information included in the registration statement. For further information with
respect to us and our common stock, you should refer to the registration
statement and to the exhibits and schedules filed as part of the registration
statement, as well as the documents discussed below.

         The SEC allows us to "incorporate by reference" the information we file
with them, which means that we can disclose important information to you by
referring you to those documents. The information incorporated by reference is
an important part of this prospectus, and information that we file later with
the SEC will automatically update or supersede this information.

         This prospectus may contain summaries of contracts or other documents.
Because they are summaries, they will not contain all of the information that
may be important to you. If you would like complete information about a contract
or other document, you should read the copy filed as an exhibit to the
registration statement or incorporated in the registration statement by
reference.

         We incorporate by reference the documents listed below and any future
filings we will make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of
the Securities Exchange Act of 1934 (File No. 0-19041) until all of the shares
are sold:

         o        Annual  Report  on Form  10-KSB  for  the  fiscal  year  ended
                  December 31, 1999; and

         o        The   description  of  our  common  stock   contained  in  the
                  registration  statement  on Form 8-A  filed  on July 15,  1996
                  under  the  Exchange  Act (File No.  0-15086),  including  all
                  amendments  or reports  filed for the purpose of updating that
                  description.

         You may request a copy of these filings, at no cost, by writing to us
at 12701 Fair Lakes Circle, Fairfax, Virginia 22033, (703) 631-6925, Attention:
John F. Moynahan or by e-mail at [email protected].

         You can review and copy the registration statement, its exhibits and
schedules, as well as the documents listed below, at the public reference
facilities maintained by the SEC as described above. The registration statement,
including its exhibits and schedules, are also available on the SEC's web site.


                                      -7-
<PAGE>


                                 USE OF PROCEEDS

         The selling stockholders are selling all of the shares covered by this
prospectus for their own accounts. Accordingly, we will not receive any proceeds
from the resale of the shares.

         We will receive proceeds from the exercise, if any, of the warrants. We
will use those proceeds, if any, for working capital and general corporate
purposes.

         We will bear the expenses relating to this registration, other than
discounts and commissions, which will be paid by the selling stockholders.

                                    DILUTION

         As of March 29, 2000, we had issued and outstanding 37,105,681 shares
of common stock. At that date, there were an additional 5,239,755 shares of
common stock reserved for possible future issuances as follows:

         o        options to  purchase  4,432,571  shares at an  exercise  price
                  between  $1.37 and $13.81 per share.  We have  registered  the
                  shares  issuable  upon  exercise  of  the  options  under  the
                  Securities Act;

         o        warrants to purchase 192,500 shares at a price between $2.00
                  and $18.00 per share. Of the 192,500 shares, we have
                  registered a total of 10,000 shares issuable upon exercise of
                  these warrants. This prospectus covers an additional 145,000
                  shares of common stock issuable upon exercise of the warrants,
                  which shares will be freely tradable without restriction
                  (subject to prospectus delivery requirements) on the effective
                  date of the registration statement. The balance of 37,500
                  shares will be deemed to be "restricted securities" when
                  issued;

         o        98,495 shares issuable upon conversion of 250 shares of series
                  D preferred stock and 100 shares of series E preferred stock,
                  all of which will be deemed to be "restricted securities" when
                  issued; and

         o        516,189 shares issuable upon exercise of options under the
                  1996 Omnibus Stock Incentive Plan, the 1997 Stock Incentive
                  Plan and the 1999 Stock Incentive Plan which have not been
                  granted as of March 29, 2000.

         During the terms of the outstanding options and warrants, we must give
the holders the opportunity to profit from a rise in the market price of the
common stock. The existence of the options and warrants may adversely affect the
terms on which we may obtain additional equity financing. Moreover, the holders
are likely to exercise their rights to acquire common stock at a time when we
would otherwise be able to obtain capital with more favorable terms than we
could obtain through the exercise of such securities.

         The shares which will be deemed "restricted securities" may be sold
under Rule 144. Rule 144 permits sales of "restricted securities" by any person,
whether or not an affiliate of the issuer, after one year. At that time, sales
can be made subject to the Rule's volume and other limitations and


                                      -8-
<PAGE>

after two years by non-affiliates without adhering to Rule 144's volume or other
limitations. In general, an "affiliate" is a person with the power to manage and
direct our policies. The SEC has stated that, generally,  executive officers and
directors of an entity are deemed affiliates of the issuing entity.

Dilution Effects of the Conversion of Outstanding Preferred Stock
- -----------------------------------------------------------------

         The outstanding series D and series E preferred stocks are convertible
into common stock over time at the discretion of the holders. While the
conversion timing, terms, conditions and formulas vary for each issue, if the
holders of this preferred stock were able to fully convert their shares into
common stock on March 29, 2000 and elected to do so, approximately 98,495
additional shares of common stock would be issued. In addition, you should note
the following:

         o        The outstanding convertible series D and series E preferred
                  securities are convertible at a floating rate based on the
                  historical market price of the common stock. As a result, the
                  lower the stock price preceding the time the holder converts,
                  the more common shares the holder will receive upon
                  conversion.

         o        To the extent the selling stockholders convert and then sell
                  their common stock, the common stock price may decrease due to
                  the additional shares in the market. This could allow the
                  selling stockholders to convert their convertible preferred
                  stock into greater amounts of common stock, the sales of which
                  would further depress the stock price.

         o        The significant downward pressure on the price of the common
                  stock as the selling shareholders convert and sell common
                  stock could encourage short sales by the selling stockholders
                  or others. This could place further downward pressure on the
                  price of the common stock.

         o        The conversion of the convertible preferred stock may result
                  in substantial dilution to the interests of other holders of
                  common stock since each holder of convertible preferred may
                  ultimately convert and sell the full amount issuable upon
                  conversion. In this regard, even though each selling
                  stockholder may not convert its preferred stock into more than
                  4.99% of the then outstanding common stock, this restriction
                  does not prevent a selling stockholder from converting and
                  selling some of its holding and then converting the rest of
                  its holdings. In this way, an individual selling stockholder
                  could sell more than 4.99% of the outstanding common stock
                  while never holding more than 4.99% of the outstanding common
                  stock at a time.

                              SELLING STOCKHOLDERS

         This prospectus covers the resale by the selling stockholders of up to
2,843,301 shares of our common stock.

         The following table lists the selling stockholders and certain
information regarding the beneficial ownership be each of the selling
stockholders of shares of our common stock as of March

                                      -9-
<PAGE>

29,  2000,  and as  adjusted  to  reflect  the sale of the  shares.  Information
concerning the selling stockholders,  their pledgees,  donees and other non-sale
transferees who may become selling  stockholders,  may change from time to time.
To the extent the selling stockholders or any of their representatives advise us
of such changes, we will report those changes in a prospectus  supplement to the
extent required. See "Plan of Distribution."

         The registration of the following shares through this Registration
Statement allows the following persons and entitiies to sell their shareholdings
on the open market and is not necessarily an indication of intent to sell their
shares of common stock

<TABLE>
<CAPTION>







                                                                 Percentage
                                                                  of Common
                                             Shares of Common       Stock                        -----------------------
                                            Stock Beneficially  Beneficially   Shares of Common   Shares of Common
                                              Owned Prior to     Owned Prior   Stock to be Sold    Stock Beneficially
                                                 Offering          to the                                 Owned
                                                                  Offering                           after Offering
                                                                                                 -----------------------

                                                                                                   Number     Percent
- -------------------------------------------------------------------------------------------------------------------------
<S>                                           <C>               <C>           <C>                <C>         <C>
Balmore Funds, S.A. (1)                             500,000         1.3%          500,000            0
                                                                                                                 *
Austost Anstalt Schaan (2)                          500,000         1.3%          500,000            0

Crystalite Investments Ltd. (3)                   1,000,000 (6)     2.7%        1,000,000            0           *

Dalston Holdings Limited (4)                       647,500          1.7%          647,500            0
                                                                                                                 *
McGuire Woods Battle and Booth LLP                   1,996 (7)        *            1,996             0
                                                                                                                 *
Parker Chapin LLP                                    4,805 (7)         *           4,805             0
                                                                                                                  *
International Business Solutions, Inc. (5)       144,000 (8)          *         144,000 (11)         0
                                                                                                                 *
E. Dell Smith                                      15,000 (9)         *          15,000 (11)         0
                                                                                                                 *
Christina S. Kohlhaas                             30,000 (10)         *          30,000 (11)         0
                                                                                                                 *
                                                                                                                 *
Total                                                                7 %                             0
                                                                     ===                            ===
</TABLE>

         * Less than 1%

         (1)      Francois  Morax is the director and control  person of Balmore
                  Funds S.A., a British Virgin Islands corporation.

         (2)      Thom Hackl is the representative and control person of Austost
                  Anstalt Schaan, a British Virgin Islands corporation.

         (3)      Mr. John  Gainsford  is the  director  and  control  person of
                  Crystalite   Investments   Ltd.,  a  British   Virgin  Islands
                  corporation.

         (4)      Mr.  C.B.  Williams  is the  director  and  control  person of
                  Dalston Holdings Limited, a Turks and Caicos company.


                                      -10-
<PAGE>

         (5)      Benjamin   Cohen  is  the  director  and  control   person  of
                  International Business Solutions, Inc.

         (6)      Represents  the  number  of shares  issued  upon  exercise  of
                  warrants.

         (7)      Represents  the  number of shares  of common  stock  issued as
                  partial compensation for legal services rendered to us for the
                  year ended December 31, 1999.

         (8)      Includes 100,000 shares of common stock issuable upon exercise
                  of warrants.  These  warrants are currently  exercisable  with
                  respect to 5,000 shares of common stock. See - "Description of
                  Securities".

         (9)      Represents  the number of shares of common stock issuable upon
                  exercise of warrants. See - "Description of Securities".

         (10)     Represents  the number of shares of common stock issuable upon
                  exercise of warrants. These warrants are currently exercisable
                  with  respect  to  20,000  shares  of  common  stock.   See  -
                  "Description of Securities".

         (11)     Assumes that each selling stockholder will exercise all of its
                  warrants into common stock.

DESCRIPTION OF PRIVATE PLACEMENT TRANSACTIONS

         The common stock have the material rights and obligations discussed
below and under the section entitled "Description of Securities." We have filed
the agreements relating to these rights and obligations with the SEC. We urge
you to read them in their entirety.

         Balmore Funds, S.A. and Austost Anstalt Schaan acquired their shares of
common stock in a private placement transaction entered into on November 19,
1999. Under the terms of the purchase agreement dated as of November 19, 1999
among us and Balmore Funds, S.A. and Austost Anstalt Schaan, we agreed to sell
1,000,000 shares of our common stock at $3.00 per share for an aggregate
purchase price of $3,000,000. The average closing price of our common stock for
the month preceding November 19, 1999 was $3.24. In connection with our sale of
common stock to Balmore Funds, S.A. and Austost Anstalt Schaan, we agreed to
file a registration statement covering the resale of the common stock by
December 31, 1999 and cause the registration statement to be declared effective
by the SEC within 90 days after filing. If the registration statement is not
effective within 90 days after filing, we will have to pay to the holders
liquidated damages equal to 1% of the purchase price paid by Balmore Funds, S.A.
and Austost Anstalt Schaan for the shares of common stock purchased and
outstanding for the first 30 day period until the registration statement has
been declared effective and 2% of the purchase price paid by Balmore Funds, S.A.
and Austost Anstalt Schaan for the shares of common stock purchased and
outstanding for each subsequent 30 day period until the registration statement
has been declared effective. The company has obtained a waiver of such
liquidated damages from Balmore Funds, S.A. and Austost Anstalt Schaan.

         Crystalite Investments Ltd. acquired its shares upon exercise of
warrants issued to it pursuant

                                      -11-
<PAGE>

to a loan  financing  agreement  dated as of October  18,  1999,  as amended and
restated,  between us and Crystalite  Investments Ltd. We received cash advances
from Crystalite  Investments Ltd. totaling $1,000,000 between September 23, 1999
and December 31, 1999.  These  advances were issued in connection  with the loan
financing  agreement and a secured  promissory note for the principal  amount of
$1,000,000.  Under  the term of the  loan  financing  agreement,  we  issued  to
Crystalite  Investments Ltd. warrants to purchase 1,000,000 shares of our common
stock.  These  warrants had a term of three years and an exercise price of $1.00
per share,  which was the closing  price of our common  stock on  September  21,
1999,  the date the agreement  between us and  Crystalite  Investments  Ltd. was
reachded.  Under the terms of the warrants,  we agreed to register the shares of
common stock  issuable upon exercise of the warrants.  As of March 29, 2000, all
of these warrants have been exercised and converted into 1,000,000 shares of our
common stock.

         Dalston Holdings Limited acquired its shares of common stock in a
private placement transaction entered into on January 3, 2000. Under the terms
of the common stock purchase agreement dated as of January 3, 2000 between us
and Dalston Holdings Fund Limited, we agreed to sell 647,500 shares of our
common stock at $4.00 per share for an aggregate purchase price of $2,590,000.
The average closing price of our common stock for the month preceding January 3,
2000 was $4.805. In connection with our sale of the common stock, we agreed to
register the common stock under the first registration statement we filed after
January 28, 2000.

         Other than being investors in various private placements and other
financings for our common stock, Balmore Funds, S.A., Austost Anstalt Schaan,
Crystalite Investments Ltd. and Dalston Holdings Limited have not had any
material relationship with us during the past three years.

         Each of McGuire Woods Battle and Booth LLP and Parker Chapin LLP are
counsel to our company. The shares of common stock were issued to McGuire Woods
Battle and Booth LLP and Parker Chapin LLP as partial compensation for legal
services rendered to us for the period ending December 31, 1999. George Allen,
Esq., a member of the firm McGuire Woods Battle and Booth LLP, is one of our
Directors. Martin Eric Weisberg, Esq., a member of the firm Parker Chapin LLP,
is our Secretary and one of our Directors.

         International Business Solutions, Inc. provides marketing related
services to us and is one of our customers. In connection with the defined
marketing program to be implemented by International Business Solutions, Inc.
for the promotion of our products, we agreed on January 3, 2000 to issue 44,000
shares of common stock and warrants to purchase 100,000 shares of common stock
at $6.00 per share. The average closing prices of our common stock for the month
preceding January 3, 2000 was $4.805. The warrants are currently exercisable
with respect to 5,000 shares.

         E. Dell Smith serves as a consultant to us on selected governmental and
business issues. In connection with such services, we agreed to issue E. Dell
Smith warrants to purchase 15,000 share of our common stock at $2.00 per share.
Warrants to purchase 10,000 shares of common stock were granted on October 25,
1999 and warrants to purchase 5,000 shares of common stock were granted on
January 3, 2000. The average closing prices of our common stock for the month
preceding October 25, 1999 was $1.805 and for the month preceding January 3,
2000 was $4.805.

         Christina Kohlhaas has provided us with certain financial consulting
services. In connection with these services, on October 22, 1996 we issued
warrants to purchase 30,000 shares of our common stock at prices ranging from
$4.25 to $18.00 per share. The average closing prices of our common stock for
the month preceding October 22, 1996 was $4.41. The warrants are currently
exercisable with respect to 20,000 shares of common stock.

         Other than as indicated above, the selling stockholders are not
affiliated with us.

                                      -12-
<PAGE>

                            DESCRIPTION OF SECURITIES

GENERAL

         Our authorized capital stock consists of 80,000,000 shares of common
stock, par value $0.01 per share, and 6,000,000 shares of preferred stock, par
value $0.01 per share. As of March 29, 2000, we have 37,105,681 shares of common
stock, 250 shares of series D preferred stock and 100 shares of series E
preferred stock issued and outstanding. We have reserved 5,239,755 shares of
common stock for issuance upon conversion of the preferred stock and outstanding
options and warrants.

COMMON STOCK

         Voting

         The holders of our common stock are entitled to one vote for each share
held of record on all matters submitted to a vote of stockholders. Our
certificate of incorporation and by-laws do not provide for cumulative voting
rights in the election of directors. Accordingly, holders of a majority of the
shares of common stock entitled to vote in any election of directors may elect
all of the directors standing for election.

         Dividends

         Holders of common stock are entitled to receive ratably those dividends
as may be declared by our board of directors out of funds legally available for
that purpose.

         Rights on Liquidation

         In the event of our liquidation, dissolution or winding up, holders of
common stock are entitled to share ratably in the assets remaining after payment
of liabilities.

         Pre-emptive or Redemption Rights

         Holders of common stock have no preemptive, conversion or redemption
rights. All of the outstanding shares of common stock are fully-paid and
nonassessable.

PREFERRED STOCK

         Our board of directors has the authority to issue up to 6,000,000
shares of preferred stock from time to time in one or more series. Our board has
the authority to establish the number of shares to be included in each series,
and to fix the designations, powers, preferences and rights of the shares of
each series and the applicable qualifications, limitations or restrictions. The
issuance of preferred stock may have the effect of delaying or preventing a
change in control. The issuance of preferred stock could decrease the amount of
earnings and assets available for distribution to the holders of common stock,
if any, or could adversely affect the rights and powers, including voting
rights, of the holders of the common stock. In certain circumstances, the
issuances could have the effect of decreasing the market price of the common
stock.

                                      -13-
<PAGE>

         As of the date of this prospectus, we have not designated any shares of
preferred stock other than the series A, B, C, D and E preferred stock. The
series A, B and C preferred stock have been fully converted. As of March 29,
2000, there are 250 shares of series D preferred stock and 100 shares of series
E preferred stock issued and outstanding.

WARRANTS

         Of the total 2,843,301 shares of common stock registered for sale by
the selling stockholders, 145,000 shares are issuable upon exercise of warrants.
The warrants were issued to the selling stockholders as compensation for certain
services provided to our company.

         The warrants to purchase 100,000 shares of our common stock have a term
of twenty-four months and an exercise price of $6.00 per share. These warrants
are currently exercisable with respect to 5,000 shares of common stock and will
become exercisable for an additional 5,000 shares on May 1, 2000 and on the
first day of each of the eighteen consecutive months immediately thereafter.

         The warrants to purchase 15,000 shares of our common stock have a term
of three years and an exercise price of $2.00 per share. These warrants are
currently fully exercisable.

         The warrants to purchase 30,000 shares of our common stock have a term
of five years and are exercisable as follows: (i) $4.25 per share with respect
to 10,000 shares of common stock; (ii) $11.00 per share with respect to an
additional 10,000 shares of common stock on the day after the closing price of
the common stock equals or exceeds $11.00 per share for 25 consecutive trading
days or for 30 out of 35 consecutive trading days; and (iii) $18.00 per share
with respect to the remaining 10,000 shares on the day after the closing bid
price of the common stock equals or exceeds $18.00 per share for 20 consecutive
trading days. All of these warrants have adjustment provisions for standard
dilution events including stock splits, stock dividends and similar
transactions. These warrants are currently exercisable with respect to 20,000
shares.

ANTI-TAKEOVER CONSIDERATIONS.

         Our certificate of incorporation authorizes the issuance of up to
6,000,000 shares of $0.01 par value preferred stock. The issuance of preferred
stock with such rights could have the effect of limiting stockholder
participation in certain transactions such as mergers or tender offers and could
discourage or prevent a change in our management. We have no present intention
to issue any additional preferred stock.

         We have a classified or staggered board of directors which limits an
outsider's ability to effect a rapid change of control of our board. In
addition, at the 1998 Annual Meeting of Stockholders held on September 24, 1998,
our shareholders approved measures to amend our certificate of incorporation and
by-laws, where applicable, to:

         o        implement an advance  notice  procedure for the  submission of
                  director  nominations  and other  business to be considered at
                  annual meetings of stockholders;

                                      -14-
<PAGE>

         o        permit only the President, the Vice Chairman of our board, the
                  Secretary or our board of directors to call special meetings
                  of stockholders and to limit the business permitted to be
                  conducted at such meetings to be brought before the meetings
                  by or at the direction of our board;

         o        provide that a member of our board of directors may only be
                  removed for cause by an affirmative vote of holders of at
                  least 66 2/3% of the voting power of the then outstanding
                  shares entitled to vote generally in the election of directors
                  voting together as a single class;

         o        fix the size of our board of directors at a maximum of twelve
                  directors, with the authorized number of directors set at ten,
                  and our board of directors having the sole power and authority
                  to increase or decrease the number of directors acting by an
                  affirmative vote of at least a majority of the total number of
                  authorized directors most recently fixed by our board of
                  directors;

         o        provide that any vacancy on the board may be filled for the
                  unexpired term (or for a new term in the case of an increase
                  in the size of the board) only by an affirmative vote of at
                  least a majority of the remaining directors then in office
                  even if less than a quorum, or by the sole remaining director;

         o        eliminate stockholder action by written consent;

         o        require the approval of holders of 80% of the then outstanding
                  voting stock  and/or the approval of 66 2/3% of the  directors
                  for certain corporate transactions; and

         o        require an affirmative vote of 66 2/3% of the voting stock in
                  order to amend or repeal any adopted amendments to the
                  certificate of incorporation and bylaws adopted at the
                  meeting.

         Those measures combined with the ability of our board of directors to
issue "blank check" preferred stock and the staggered terms of the members of
our board of directors, could have the effect of delaying, deterring or
preventing a change in control without any further action by the stockholders.
In addition, the issuance of preferred stock, without stockholder approval, on
such terms as our board may determine, could adversely affect the voting power
of the holders of the common stock, including the loss of voting control to
others.

TRANSFER AGENT AND REGISTRAR

         Continental Stock Transfer & Trust Company is our Transfer Agent and
Registrar for our common stock and the redeemable warrants.

                                      -15-
<PAGE>

                              PLAN OF DISTRIBUTION

         The selling stockholders and their pledgees, donees, transferees and
other subsequent owners, may offer their shares at various times in one or more
of the following transactions:

         o        on any U.S.  securities exchange on which our common stock may
                  be listed at the time of sale
         o        in the over-the-counter market
         o        in privately negotiated transactions
         o        in connection with short sales; or
         o        in a combination of any of the above transactions.

         The selling stockholders may offer their shares of common stock at
prevailing market prices at the time of sale, at prices related to those
prevailing market prices, at negotiated prices or at fixed prices.

         The selling stockholders may also sell the shares under Rule 144
instead of under this prospectus, if Rule 144 is available for those sales.

         The transactions in the shares covered by this prospectus may be
effected by one or more of the following methods:

         o        ordinary brokerage  transactions and transactions in which the
                  broker solicits purchasers;
         o        purchases by a broker or dealer as principal, and the resale
                  by that broker or dealer for its account under this
                  prospectus, including resale to another broker or dealer;
         o        block trades in which the broker or dealer will attempt to
                  sell the shares as agent but may position and resell a portion
                  of the block as principal in order to facilitate the
                  transaction; or
         o        negotiated   transactions  between  selling  stockholders  and
                  purchasers without a broker or dealer.

         The selling stockholders and any broker-dealers or other persons acting
on the behalf of parties that participate in the distribution of the shares may
be deemed to be underwriters. Any commissions or profits they receive on the
resale of the shares may be deemed to be underwriting discounts and commissions
under the Securities Act.

         As of the date of this prospectus, we are not aware of any agreement,
arrangement or understanding between any broker or dealer and any of the selling
stockholders with respect to the offer or sale of the shares under this
prospectus.

         We have advised the selling stockholders that during the time each is
engaged in distributing shares covered by this prospectus, each must comply with
the requirements of the Securities Act and Rule 10b-5 and Regulation M under the
Exchange Act. Under those rules and regulations, they:

         o        may not engage in any  stabilization  activity  in  connection
                  with our securities;

                                      -16-
<PAGE>

         o        must furnish each broker which offers common stock covered by
                  this prospectus with the number of copies of this prospectus
                  which are required by each broker; and

         o        may not bid for or purchase any of our securities or attempt
                  to induce any person to purchase any of our securities other
                  than as permitted under the Exchange Act.

         In the purchase agreements and warrants we executed in connection with
the transactions with the selling stockholders we agreed to indemnify and hold
harmless each selling stockholder against liabilities under the Securities Act,
which may be based upon, among other things, any untrue statement or alleged
untrue statement of a material fact or any omission or alleged omission of a
material fact, unless made or omitted in reliance upon written information
provided to us by that selling stockholder. We have agreed to bear the expenses
incident to the registration of the shares, other than selling discounts and
commissions.

                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

         Section 145 of the Delaware General Corporation Law allows companies to
indemnify their directors and officers against expenses, judgments, fines and
amounts paid in settlement under the conditions and limitations described in the
law. Our certificate of incorporation authorizes us to indemnify our officers,
directors and other agent to the fullest extent permitted under Delaware law.

         Our certificate of incorporation provides that a director is not
personally liable for monetary damages to us or our stockholders for breach of
his or her fiduciary duties as a director. A director will be held liable for a
breach of his or her duty of loyalty to us or our stockholders, his or her
intentional misconduct or willful violation of law, actions or in actions not in
good faith, an unlawful stock purchase or payment of a dividend under Delaware
law, or transactions from which the director derives an improper personal
benefit. This limitation of liability does not affect the availability of
equitable remedies against the director including injunctive relief or
rescission.

         We have purchased a directors and officers liability and reimbursement
policy that covers liabilities of our directors and officers arising out of
claims based upon acts or omissions in their capacities as directors and
officers.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to our directors, officers and controlling persons pursuant
to the foregoing provisions, or otherwise, we have been advised that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Securities Act and is, therefore,
unenforceable.

                                  LEGAL MATTERS

         Parker  Chapin LLP,  New York,  New York will pass upon the validity of
the securities offered hereby. Martin Eric Weisberg, Esq., a member of the firm,
is our Secretary and one of our Directors.




                                      -17-
<PAGE>




                                     EXPERTS

        The consolidated financial statements incorporated in this prospectus by
reference to the Annual Report on Form 10-KSB for the year ended December 31,
1999, have been so incorporated in reliance on the report (which contains an
explanatory paragraph relating to our ability to continue as a going concern as
described in Note 1 to the consolidated financial statements) of Grant Thornton
LLP, independent accountants, given on the authority of said firm as experts in
auditing and accounting.

                               RECENT DEVELOPMENTS

        On March 30, 2000 the Company announced that it had executed a
definitive merger agreement with Selfware Inc., a leading provider of enterprise
management services and software for projects, maintenance and work flow.
Selfware is a privately-held company that was founded in 1983 and has over 30
full-time employees at its headquarters in Vienna, Virginia and an office in
Seattle, Washington. For the twelve months ended December 31, 1999, revenues for
Selfware were approximately $5.0 million, gross profit was approximately $2.0
million and net income was approximately $0.1 million. Under the terms of the
definitive agreement, the value of Selfware is determined by a formula with a
maximum valuation of approximately $8.1 million. The acquisition of Selfware by
Xybernaut will be effected by exchanging shares of Selfware for shares of
Xybernaut based on a ratio determined by the 30-day average closing price for
Xybernaut's common stock prior to closing. The approval of Selfware shareholders
for the acquisition is expected by April 7, 2000. The transaction is intended to
be accounted for as a pooling of interests. A fairness opinion for the
acquisition was provided to Xybernaut by a leading investment bank. Restated
financial statements to give effect to this proposed transaction have not been
presented herein because the transaction does not meet the significance tests
promulgated by Regulation S-X of the SEC.


                                      -18-
<PAGE>


<TABLE>
<CAPTION>



<S>                                                                                  <C>
=========================================================                           ==============================================









        WE HAVE NOT AUTHORIZED ANY DEALER, SALESPERSON
OR ANY OTHER PERSON TO GIVE ANY INFORMATION OR TO                                                     _________
REPRESENT ANYTHING NOT CONTAINED IN THIS PROSPECTUS.                                            SHARES OF COMMON STOCK
YOU MUST NOT RELY ON ANY UNAUTHORIZED INFORMATION.
THIS PROSPECTUS DOES NOT OFFER TO SELL OR BUY ANY SHARES IN ANY JURISDICTION
WHERE IT IS UNLAWFUL. THE INFORMATION IN THIS PROSPECTUS IS CURRENT AS OF
_________________, 2000.

                                                                                                XYBERNAUT CORPORATION

                   TABLE OF CONTENTS

                                                  Page
                                                  ----

Risk Factors.........................................2
Where You Can Find More
        Information About Us.........................7
Use of Proceeds......................................8
Dilution.............................................8
Selling Stockholders ................................9
Description of Securities...........................13
Plan of Distribution ...............................16
Indemnification for Securities
        Act Liabilities.............................17
Legal Matters.......................................17
Experts ............................................18                                       ____________
                                                                                              PROSPECTUS
                                                                                              ____________


                                                                                       _________________________, 2000

=========================================================     ======================================================
</TABLE>


<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following table sets forth the various  expenses which will be paid
by us in connection with the issuance and  distribution of the securities  being
registered on this  registration  statement.  The selling  stockholders will not
incur any of the expenses set forth below. All amounts shown are estimates.

          Filing fee for registration statement...............      $13,568.57
          Legal fees and expenses.............................      $10,000.00
          Accounting expenses.................................       $5,000.00
                                                                     ---------
          Total...............................................      $28,568.57
                                                                    ==========

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

         Section 145 of the General Corporation Law of the State of Delaware
(the "DGCL") provides, in general, that a corporation incorporated under the
laws of the State of Delaware, such as the registrant, may indemnify any person
who was or is a party or is threatened to be made a party to any threatened,
pending or completed action, suit or proceeding (other than a derivative action
by or in the right of the corporation) by reason of the fact that such person is
or was a director, officer, employee or agent of the corporation, or is or was
serving at the request of the corporation as a director, officer, employee or
agent of another enterprise, against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement actually and reasonably incurred
by such person in connection with such action, suit or proceeding if such person
acted in good faith and in a manner such person reasonably believed to be in or
not opposed to the best interests of the corporation, and, with respect to any
criminal action or proceeding, had no reasonable cause to believe such person's
conduct was unlawful. In the case of a derivative action, a Delaware corporation
may indemnify any such person against expenses (including attorneys' fees)
actually and reasonably incurred by such person in connection with the defense
or settlement of such action or suit if such person acted in good faith and in a
manner such person reasonably believed to be in or not opposed to the best
interests of the corporation, except that no indemnification will be made in
respect of any claim, issue or matter as to which such person will have been
adjudged to be liable to the corporation unless and only to the extent that the
Court of Chancery of the State of Delaware or any other court in which such
action was brought determines such person is fairly and reasonably entitled to
indemnity for such expenses.

         Our certificate of incorporation provides that directors will not be
personally liable for monetary damages to us or our stockholders for breach of
fiduciary duty as a director, except for liability resulting from a breach of
the director's duty of loyalty to us or our stockholders, intentional misconduct
or willful violation of law, actions or inactions not in good faith, an unlawful
stock purchase or payment of a dividend under Delaware law, or transactions from
which the director derives improper personal benefit. Such limitation of
liability does not affect the availability of equitable remedies such as
injunctive relief or rescission. Our certificate of incorporation also


                                      -19-
<PAGE>

authorizes us to indemnify our officers, directors and other agents, by bylaws,
agreements or otherwise, to the fullest extent permitted under Delaware law. We
have entered into an indemnification agreement with each of our directors and
officers which may, in some cases, be broader than the specific indemnification
provisions contained in our certificate of incorporation or as otherwise
permitted under Delaware law. Each indemnification agreement may require us,
among other things, to indemnify such officers and directors against certain
liabilities that may arise by reason of their status or service as a director or
officer, against liabilities arising from willful misconduct of a culpable
nature, and to obtain directors' and officers' liability insurance if available
on reasonable terms.

         We maintain a directors and officers liability policy with Genesis
Insurance Company that contains a limit of liability of $3,000,000 per policy
year.

ITEM 16.  EXHIBITS.

NUMBER            DESCRIPTION OF EXHIBIT

4.1               Form of Warrant issued to Crystalite Investments, Ltd.
4.2               Form of Warrant issued to International Business Solutions,
                  Inc.
4.3               Form of Warrant issued to E. Dell Smith
4.4               Form of Warrant issued to Christina S. Kohlhaas.
4.5               Form of Warrant issued to E. Dell Smith
5                 Opinion of Parker Chapin LLP.
10.1(1)           Form of Purchase Agreement dated as of November 19, 1999.
10.2              Form of Restated Bridge Financing Agreement dated as of
                  October 18, 1999, restated as of December 30, 1999.
10.3              Form of Common Stock Purchase Agreement dated as of January 3,
                  2000.
10.4(1)           Form of Registration Rights Agreement dated as of November 19,
                  1999.
10.5(1)           Form of Escrow Agreement dated as of November 19, 1999.
23.1              Consent of Grant Thornton LLP
23.2              Consent of Parker Chapin LLP (included in their opinion filed
                  as Exhibit 5.1).

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

(1)      Incorporated by reference to the report on Form 10-KSB, file No.
         000-21013


ITEM 17.  UNDERTAKINGS.

         The undersigned registrant hereby undertakes:

         (1) 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-2
<PAGE>
            (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. Notwithstanding the foregoing, any increase or
     decrease in volume of securities offered (if the total dollar value of
     securities offered would not exceed that which was registered) and any
     deviation from the low or high and of the estimated maximum offering range
     may be reflected in the form of prospectus filed with the Securities and
     Exchange Commission pursuant to Rule 424(b) if, in the aggregate, the
     changes in volume and price represent no more than 20 percent change in the
     maximum aggregate offering price set forth in the "Calculation of
     Registration Fee" table in the effective 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;

         (2) That, for the purpose of determining any liability under the
Securities Act of 1933, each such post-effective amendment will be deemed to be
a new registration statement relating to the securities offered therein, and the
offering of such securities at that time will be deemed to be the initial bona
fide offering thereof.

         (3) 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.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the small business issuer pursuant to the foregoing provisions, or otherwise,
the small business issuer has been advised that in the opinion of the Securities
and Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable.

         In the event that a claim for indemnification against such liabilities
(other than the payment by the small business issuer of expenses incurred or
paid by a director, officer or controlling person of the small business issuer
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 small business issuer 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 Securities Act and will be governed by
the final adjudication of the issue.

         The undersigned small business issuer hereby undertakes that, for
purposes of determining any liability under the Securities Act of 1933, each
filing of the registrant's annual report pursuant to section 13(a) or section
15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing
of an employee benefit plan's annual report pursuant to section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement will be deemed

                                      II-3

to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time will be deemed to be the initial bona fide offering thereof.


                                      II-4

<PAGE>


                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Fairfax, Commonwealth of Virginia on March 31, 2000.

                                               XYBERNAUT CORPORATION


                                               By:
Edward G. Newman
                                               /s/ Edward G. Newman
                                               --------------------------------
                                               Chairman of the Board, President
                                                  and Chief Executive Officer

         Pursuant to the requirements of the Securities Act of 1933, this
registration statement on Form S-3 has been signed below by the following
persons in the capacities indicated on March 31, 2000.

<TABLE>
<CAPTION>

<S>                                                         <C>
/s/ Edward G. Newman                                         Chairman of the Board,
- --------------------------------------------                 President and Chief Executive Officer
Edward G. Newman


/s/ Kaz Toyosato                                             Executive Vice President -
- --------------------------------------------                 Asian Operations and Director
Kaz Toyosato

/s/ John F. Moynahan                                         Senior Vice President and
- --------------------------------------------                 Chief Financial Officer
John F. Moynahan


/s/ Martin Eric Weisberg                                     Director
- -------------------------------------------
Martin Eric Weisberg

/s/ Lt. Gen. Harry E. Soyster                                Director
- --------------------------------------------
Lt. Gen. Harry E. Soyster


/s/ James J. Ralabate                                        Director
- --------------------------------------------
James J. Ralabate
</TABLE>


                                      II-5

<PAGE>
<TABLE>
<CAPTION>




<S>                                                         <C>
/s/ Keith P. Hicks                                           Director
- --------------------------------------------
Keith P. Hicks

/s/ Steven A. Newman                                         Executive Vice President and Vice Chairman
- --------------------------------------------
Steven A. Newman                                             of the Board


/s/ Phillip E. Pearce                                        Director
- --------------------------------------------
Phillip E. Pearce

/s/ Eugene J. Amobi                                          Director
- --------------------------------------------
Eugene J. Amobi

/s/ Edwin Vogt                                               Director
- --------------------------------------------
Edwin Vogt
</TABLE>


<PAGE>


                                 SECURITIES AND
                                    EXCHANGE
                                   COMMISSION
                             WASHINGTON, D.C. 20549


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




                                   EXHIBITS TO

                                    FORM S-3

                             REGISTRATION STATEMENT

                                      UNDER

                           THE SECURITIES ACT OF 1933


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







                              XYBERNAUT CORPORATION
                       (EXACT NAME OF ISSUER AS SPECIFIED
                                 IN ITS CHARTER)



                                 APRIL __, 2000

                                      E-1

<PAGE>

<TABLE>
<CAPTION>


NUMBER   DESCRIPTION OF EXHIBIT
<S>            <C>
4.1               Form of Warrant issued to Crystalite Investments, Ltd.
4.2               Form of Warrant issued to International Business Solutions, Inc.
4.3               Form of Warrant issued to E. Dell Smith
4.4               Form of Warrant issued to Christina S. Kohlhaas.
4.5               Form of Warrant issued to E. Dell Smith
5                 Opinion of Parker Chapin LLP.
10.1(1)           Form of Purchase Agreement dated as of November 19, 1999.
10.2              Form of Restated Bridge Financing Agreement dated as of October 18, 1999, restated as of December 30, 1999.
10.3              Form of Common Stock Purchase Agreement dated as of January 3, 2000.
10.4(1)           Form of Registration Rights Agreement dated as of November 19, 1999.
10.5(1)           Form of Escrow Agreement dated as of November 19, 1999.
23.1              Consent of Grant Thornton LLP.
23.2              Consent of Parker Chapin LLP (included in their opinion filed as Exhibit 5.1).

- -------------
</TABLE>

(1)   Incorporated by reference to the report on Form 10-KSB, file No. 000-21013

                                      E-2


                                                                     EXHIBIT 4.1

THESE  SECURITIES AND THE SECURITIES  ISSUABLE UPON THEIR EXERCISE HAVE NOT BEEN
REGISTERED  UNDER THE SECURITIES  ACT OF 1933 AND MAY NOT BE TRANSFERRED  UNLESS
COVERED BY AN  EFFECTIVE  REGISTRATION  STATEMENT  UNDER SAID ACT, A "NO ACTION"
LETTER  FROM  THE  SECURITIES  AND  EXCHANGE  COMMISSION  WITH  RESPECT  TO SUCH
TRANSFER,  A TRANSFER MEETING THE REQUIREMENTS OF RULE 144 OF THE SECURITIES AND
EXCHANGE COMMISSION,  OR AN OPINION OF COUNSEL SATISFACTORY TO THE ISSUER TO THE
EFFECT THAT ANY SUCH TRANSFER IS EXEMPT FROM SUCH REGISTRATION.

                              XYBERNAUT CORPORATION

                          COMMON STOCK PURCHASE WARRANT

                  1.   Issuance.   In   consideration   of  good  and   valuable
consideration,  the  receipt  of  which  is  hereby  acknowledged  by  Xybernaut
Corporation,  a Delaware  corporation  (the "Company"),  Crystalite  Investments
Ltd.,  or  registered  assigns  (the  "Holder")  is hereby  granted the right to
purchase  at any time until 5:00  P.M.,  New York City time,  on October 1, 2004
(the "Expiration  Date"),  One Million  (1,000,000) fully paid and nonassessable
shares of the  Company's  Common  Stock,  par value $.01 per share (the  "Common
Stock") at an initial exercise price of $1.01 per share (the "Exercise  Price"),
subject to further adjustment as set forth in Section 6 hereof.

                  2. Exercise of Warrants.  This Warrant is exercisable in whole
or in part at the Exercise  Price per share of Common Stock  payable  hereunder,
payable  in cash  or by  certified  or  official  bank  check,  or by  "cashless
exercise",  by means of  tendering  this Warrant  Certificate  to the Company to
receive  a number  of  shares  of  Common  Stock  equal in  Market  Value to the
difference  between the Market Value of the shares of Common Stock issuable upon
exercise  of this  Warrant  and the total  cash  exercise  price  thereof.  Upon
surrender of this Warrant  Certificate  with the annexed Notice of Exercise Form
duly  executed,  together  with payment of the Exercise  Price for the shares of
Common Stock purchased, the Holder shall be entitled to receive a certificate or
certificates  for the shares of Common Stock so  purchased.  For the purposes of
this Section 2, "Market  Value" shall be an amount equal to the average  closing
bid  price of a share  of  Common  Stock  for the ten (10)  days  preceding  the
Company's receipt of the Notice of Exercise Form duly executed multiplied by the
number of shares of Common  Stock to be issued upon  surrender  of this  Warrant
Certificate.

                  3.  Reservation  of Shares.  The Company hereby agrees that at
all times during the term of this  Warrant  there shall be reserved for issuance
upon exercise of this Warrant such number of shares of its Common Stock as shall
be required for issuance upon exercise of this Warrant (the "Warrant Shares").



<PAGE>


                  4. Mutilation or Loss of Warrant.  Upon receipt by the Company
of evidence satisfactory to it of the loss, theft,  destruction or mutilation of
this  Warrant,  and (in the  case of  loss,  theft or  destruction)  receipt  of
reasonably  satisfactory  indemnification,  and (in the case of mutilation) upon
surrender and cancellation of this Warrant, the Company will execute and deliver
a new  Warrant of like tenor and date and any such lost,  stolen,  destroyed  or
mutilated Warrant shall thereupon become void.

                  5.  Rights of the  Holder.  The Holder  shall  not,  by virtue
hereof, be entitled to any rights of a stockholder in the Company, either at law
or equity,  and the rights of the Holder are limited to those  expressed in this
Warrant and are not  enforceable  against  the Company  except to the extent set
forth herein.

                  6.       Protection Against Dilution.

                         6.1  Adjustment  Mechanism.  If an  adjustment  of  the
Exercise  Price is  required  pursuant  to this  Section 6, the Holder  shall be
entitled to purchase  such number of  additional  shares of Common Stock as will
cause (i) the total  number of shares  of Common  Stock  Holder is  entitled  to
purchase  pursuant to this  Warrant,  multiplied  by (ii) the adjusted  purchase
price per share,  to equal (iii) the dollar amount of the total number of shares
of Common Stock Holder is entitled to purchase before  adjustment  multiplied by
the total purchase price before adjustment.

                         6.2 Capital Adjustments.  In case of any stock split or
reverse  stock split,  stock  dividend,  reclassification  of the Common  Stock,
recapitalization,  merger or consolidation, or like capital adjustment affecting
the Common  Stock of the  Company,  the  provisions  of this  Section 6 shall be
applied as if such capital  adjustment event had occurred  immediately  prior to
the date of this  Warrant  and the  original  purchase  price  had  been  fairly
allocated  to the stock  resulting  from such capital  adjustment;  and in other
respects the  provisions of this Section  shall be applied in a fair,  equitable
and reasonable manner so as to give effect, as nearly as may be, to the purposes
hereof.  A rights offering to  stockholders  shall be deemed a stock dividend to
the extent of the bargain purchase element of the rights.

                  7. Transfer to Comply with the  Securities  Act;  Registration
Rights.

                  (a) This Warrant has not been registered  under the Securities
Act of 1933,  as  amended,  (the  "Act")  and has been  issued to the Holder for
investment and not with a view to the  distribution of either the Warrant or the
Warrant Shares.  Neither this Warrant nor any of the Warrant Shares or any other
security  issued  or  issuable  upon  exercise  of  this  Warrant  may be  sold,
transferred, pledged or hypothecated in the absence of an effective registration
statement  under the Act  relating  to such  security  or an  opinion of counsel
satisfactory  to the Company that  registration  is not required  under the Act.
Each  certificate  for the Warrant,  the Warrant  Shares and any other  security
issued or issuable  upon  exercise of this Warrant shall contain a legend on

<PAGE>

the face thereof, in form and substance satisfactory to counsel for the Company,
setting forth the restrictions on transfer contained in this Section.

                  (b)  The  Company  hereby  grants  to  the  Holder   piggyback
registration rights with respect to the Warrant Shares. In the event the Company
is  filing a  Registration  Statement  for  itself  or on  behalf  of any of its
shareholders,  the  Company  shall  notify the Holder in writing  reasonably  in
advance of such filing (but at least five business days) and give the Holder the
opportunity  to include all or any party of the Warrant  Shares  (whether or not
previously  issued,  to the extent  permissible  under the Act or any regulation
promulgated  thereunder.  Upon the Holder's notification that the Holder desires
to have all or any portion of the Warrant Shares included in such  registration,
the Company shall,  at no cost or expense to the Holder,  include or cause to be
included in such registration  statement the Warrant Shares so identified by the
Holder.

                  (c) In addition to the registration  rights referred to in the
preceding  provisions  of Section (b),  effective  after the  expiration  of the
effectiveness of the Registration  Statement as contemplated by the Registration
Rights Agreement,  the Holder shall have demand piggy-back  registration  rights
with  respect to the Warrant  Shares then held by the Holder or then  subject to
issuance upon exercise of this Warrant  (collectively,  the  "Remaining  Warrant
Shares"),  subject to the conditions set forth below.  If, at any time after the
Registration  Statement  has ceased to be  effective,  the Company  participates
(whether  voluntarily  or by reason of an  obligation  to a third  party) in the
registration  of any  shares of the  Company's  stock,  the  Company  shall give
written  notice  thereof  to the  Holder  and the  Holder  shall have the right,
exercisable  within ten (10)  business  days after  receipt of such  notice,  to
demand inclusion of all or a portion of the Holder's Remaining Warrant Shares in
such registration statement.

                  8.  Notices.  Any notice or other  communication  required  or
permitted  hereunder  shall be in  writing  and shall be  delivered  personally,
telegraphed,  telexed,  sent by  facsimile  transmission  or sent by  certified,
registered or express mail,  postage  pre-paid.  Any such notice shall be deemed
given when so delivered  personally,  telegraphed,  telexed or sent by facsimile
transmission,  or, if  mailed,  two days after the date of deposit in the United
States mails, as follows:

                           (i)      if the to Company, to:

                                    Xybernaut Corporation
                                    12701 Fair Lakes Circle
                                    Suite 550
                                    Fairfax, Virginia 22033
                                    Fax no.: 703-631-6734
                                    Attn: Chief Financial Officer
<PAGE>

                           (ii)     if to the Holder, to:
                                    Crystalite Investments, Ltd.
                                    111 Arlosorov Street
                                    Tel Aviv, Israel
                                    Fax no.: 011-972-3-691-0476


Any party may be  notice  given in  accordance  with this  Section  to the other
parties designate another address or person for receipt of notices hereunder.

                  9. Supplements and Amendments;  Whole Agreement.  This Warrant
may be amended or  supplemented  only by an instrument in writing  signed by the
parties   hereto.   This  Warrant  of  even  date  herewith   contain  the  full
understanding  of the parties  hereto with respect to the subject  matter hereof
and  thereof  and  there  are  no  representations,  warranties,  agreements  or
understandings other than expressly contained herein and therein.

                  10.  Governing  Law.  This  Warrant  shall be  deemed  to be a
contract made under the laws of the State of New York and for all purposes shall
be  governed  by and  construed  in  accordance  with  the  laws of  such  State
applicable to contracts to be made and performed entirely within such State.

                  11.  Counterparts.  This Warrant may be executed in any number
of counterparts and each of such  counterparts  shall for all purposes be deemed
to be an original,  and all such counterparts shall together  constitute but one
and the same instrument.

                  12. Descriptive Headings.  Descriptive headings of the several
Sections of this Warrant are inserted for convenience only and shall not control
or affect the meaning or construction of any of the provisions hereof.


<PAGE>



         IN WITNESS WHEREOF, the parties hereto have executed this Warrant as of
the __th day of December 1999.


                                    XYBERNAUT CORPORATION



                                    By:_______________________________________
                                             Name: Steven A. Newman
                                             Title:   Vice Chairman

Attest:


- ------------------------------
- ------------------------------
Chief Administrative Officer



<PAGE>



                                     FORM OF
                          NOTICE OF EXERCISE OF WARRANT

         The  undersigned  hereby  irrevocably  elects to  exercise  the  right,
represented by the Warrant Certificate dated as of __________, 1999, to purchase
__________  shares of the Common Stock,  par value $.01 per share,  of Xybernaut
Corporation  and tenders  herewith  payment in accordance with Section 1 of said
Common Stock Purchase Warrant.

         Please deliver the stock certificate to:





Dated:

                                          CRYSTALITE INVESTMENTS, LTD.


                                           By:__________________________________




                                                                    EXHIBIT 4.2

THE SALE AND ISSUANCE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT
BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES
ACT"), OR UNDER THE SECURITIES LAW OF ANY STATE OR OTHER  JURISDICTION.  NEITHER
THIS  SECURITY NOR ANY INTEREST OR  PARTICIPATION  HEREIN MAY BE OFFERED,  SOLD,
ASSIGNED, TRANSFERRED,  PLEDGED, ENCUMBERED,  HYPOTHECATED OR OTHERWISE DISPOSED
OF, UNLESS 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 UNDER THE SECURITIES ACT OR ANY APPLICABLE STATE SECURITIES LAWS.


                          COMMON STOCK PURCHASE WARRANT


                              XYBERNAUT CORPORATION


                             EXPIRES JANUARY 2, 2002


No.:                                                   Number of Shares: 100,000
Date of Issuance:  January 3, 2000


                  1.   Issuance.   In   consideration   of  good  and   valuable
consideration,  the  receipt  of  which  is  hereby  acknowledged  by  Xybernaut
Corporation,  a Delaware  corporation  (the "Company"),  International  Business
Solutions,  Inc., or registered  assigns (the  "Holder"),  is hereby granted the
right to purchase at any time until 5:00 P.M., New York City time, on January 2,
2002 (the  "Expiration  Date"),  one hundred  thousand  (100,000) fully paid and
nonassessable  shares of the Company's  Common  Stock,  par value $.01 per share
(the  "Common  Stock")  at an  initial  exercise  price of $6.00 per share  (the
"Exercise Price").

                  2. Exercise of Warrants. This Warrant shall become exercisable
as to 5% of the total number of shares of Common Stock subject hereto on April
1, 2001 and on the first day of each of the nineteen (19) consecutive months
immediately thereafter. This Warrant is exercisable in whole or in part at the
Exercise Price per share of Common Stock payable hereunder, payable in cash or
by certified or official bank check. Upon surrender of this Warrant Certificate
with the annexed Notice of Exercise Form duly executed,

<PAGE>

together  with  payment of the  Exercise  Price for the  shares of Common  Stock
purchased, the Holder shall be entitled to receive a certificate or certificates
for the shares of Common Stock so purchased.

                  3.  Reservation  of Shares.  The Company hereby agrees that at
all times during the term of this  Warrant  there shall be reserved for issuance
upon exercise of this Warrant such number of shares of its Common Stock as shall
be required for issuance upon exercise of this Warrant (the "Warrant Shares").

                  4. Mutilation or Loss of Warrant.  Upon receipt by the Company
of evidence satisfactory to it of the loss, theft,  destruction or mutilation of
this  Warrant,  and (in the  case of  loss,  theft or  destruction)  receipt  of
reasonably  satisfactory  indemnification,  and (in the case of mutilation) upon
surrender and cancellation of this Warrant, the Company will execute and deliver
a new  Warrant of like tenor and date and any such lost,  stolen,  destroyed  or
mutilated Warrant shall thereupon become void.

                  5.  Rights of the  Holder.  The Holder  shall  not,  by virtue
hereof, be entitled to any rights of a stockholder in the Company, either at law
or equity,  and the rights of the Holder are limited to those  expressed in this
Warrant and in the Consulting Agreement between the Company and Libra Finance SA
pursuant  to  which  this  Warrant  was  originally   issued  (the   "Consulting
Agreement") and are not enforceable against the Company except to the extent set
forth herein and therein.

                  6. Transfer to Comply with the  Securities  Act;  Registration
Rights.

                         6.1 This  Warrant  has not been  registered  under  the
Securities  Act of 1933,  as  amended,  (the  "Act") and has been  issued to the
Holder  for  investment  and not with a view to the  distribution  of either the
Warrant or the  Warrant  Shares.  Neither  this  Warrant  nor any of the Warrant
Shares or any other  security  issued or issuable  upon exercise of this Warrant
may  be  offered,  sold,  transferred,  pledged,  encumbered,   hypothecated  or
otherwise  disposed of in the  absence of an  effective  registration  statement
under the Act relating to such security or an opinion of counsel satisfactory to
the Company that  registration  is not required under the Act. Each  certificate
for the Warrant,  the Warrant Shares and any other  security  issued or issuable
upon exercise of this Warrant  shall  contain a legend on the face  thereof,  in
form and substance  satisfactory  to counsel for the Company,  setting forth the
restrictions on transfer contained in this Section.

                         6.2 The Company  hereby grants to the Holder  piggyback
registration  rights  with  respect to the Warrant  Shares  which  rights  shall
commence on the date of issuance  of this  Warrant.  In the event the Company is
filing  a  registration  statement  for  itself  or on  behalf  of  any  of  its
shareholders  at any time after the date  hereof,  the Company  shall notify the
Holder in writing  reasonably  in advance of such  filing (but at least five (5)
business days) and give the

<PAGE>

Holder the  opportunity  to include  all or any  portion of the  Warrant  Shares
(whether or not previously  issued,  to the extent  permissible under the Act or
any regulation promulgated thereunder).  Upon the Holder's notification that the
Holder desires to have all or any portion of the Warrant Shares included in such
registration, the Company shall, at no cost or expense to the Holder, include or
cause to be  included  in such  registration  statement  the  Warrant  Shares so
identified  by the  Holder,  provided,  however,  that if, in the opinion of the
Company's managing underwriter or underwriters,  if any, for such offering,  the
inclusion of the Warrant Shares,  when added to the securities  being registered
by the Company or any selling stockholder(s),  will exceed the maximum amount of
the Company's  securities that can be marketed (x) at a price reasonably related
to their then current  market  value,  or (y) without  materially  and adversely
affecting  the  entire  terms of the  offering,  then the number of shares to be
included in such  offering  shall be reduced,  and such shares shall be excluded
from such offering in a number deemed necessary by such managing  underwriter or
underwriters,  based upon and subject to a pro rata  reduction  of the number of
Warrant Shares the Holder of such securities proposed to include therein.

                  7.  Notices.  Any notice or other  communication  required  or
permitted  hereunder  shall be in  writing  and shall be  delivered  personally,
telegraphed,  telexed,  sent by  facsimile  transmission  or sent by  certified,
registered or express mail,  postage  pre-paid.  Any such notice shall be deemed
given when so delivered  personally,  telegraphed,  telexed or sent by facsimile
transmission,  or, if  mailed,  two (2) days  after the date of  deposit  in the
United States mails, as follows:

(1)      if the to Company, to:

                                    Xybernaut Corporation
                                    12701 Fair Lakes Circle
                                    Suite 550
                                    Fairfax, Virginia 22033
                                    Attn: Chief Financial Officer
                                    Fax No.:  (703) 631-3903

(2)      if to the Holder, to:

                                    International Business Solutions, Inc.
                                    301 Park Ave.
                                    New York, New York 10022
                                    Attn:
                                    Fax No.  (212) 888-7580

Any party may be  notice  given in  accordance  with this  Section  to the other
parties designate another address or person for receipt of notices hereunder.
<PAGE>

                  8. Supplements and Amendments;  Whole Agreement.  This Warrant
may be amended or  supplemented  only by an instrument in writing  signed by the
parties hereto. This Warrant of even date herewith and the Consulting  Agreement
contain the full understanding of the parties hereto with respect to the subject
matter  hereof  and  thereof  and  there  are  no  representations,  warranties,
agreements or understandings other than expressly contained herein and therein.

                  9.  Governing  Law.  This  Warrant  shall  be  deemed  to be a
contract made under the laws of the State of New York and for all purposes shall
be  governed  by and  construed  in  accordance  with  the  laws of  such  State
applicable to contracts to be made and performed entirely within such State.

                  10. Descriptive Headings.  Descriptive headings of the several
Sections of this Warrant are inserted for convenience only and shall not control
or affect the meaning or construction of any of the provisions hereof.

<PAGE>


         IN WITNESS WHEREOF, the parties hereto have executed this Warrant as of
January 3, 2000.


                             XYBERNAUT CORPORATION



                             By:_______________________________________
                             Name: Steven A. Newman
                              Title: Vice Chairman

Attest:



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

- ----------------------------
Chief Administrative Officer



<PAGE>




                          NOTICE OF EXERCISE OF WARRANT

         The  undersigned  hereby  irrevocably  elects to  exercise  the  right,
represented by the Warrant Certificate dated as of __________, 2000, to purchase
__________  shares of the Common Stock,  par value $.01 per share,  of Xybernaut
Corporation  and tenders  herewith  payment in accordance with Section 1 of said
Common Stock Purchase Warrant.

         Please deliver the stock certificate to:





Dated:______________________




                                          By:__________________________________







                                                                   EXHIBIT 4.3

THE SALE AND ISSUANCE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT
BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES
ACT"), OR UNDER THE SECURITIES LAW OF ANY STATE OR OTHER  JURISDICTION.  NEITHER
THIS  SECURITY NOR ANY INTEREST OR  PARTICIPATION  HEREIN MAY BE OFFERED,  SOLD,
ASSIGNED, TRANSFERRED,  PLEDGED, ENCUMBERED,  HYPOTHECATED OR OTHERWISE DISPOSED
OF, UNLESS 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 UNDER THE SECURITIES ACT OR ANY APPLICABLE STATE SECURITIES LAWS.


                          COMMON STOCK PURCHASE WARRANT


                              XYBERNAUT CORPORATION


                             EXPIRES OCTOBER 24, 2002


No.:                                                   Number of Shares: 10,000
Date of Issuance:  October 25, 1999


                  1.   Issuance.   In   consideration   of  good  and   valuable
consideration,  the  receipt  of  which  is  hereby  acknowledged  by  Xybernaut
Corporation, a Delaware corporation (the "Company"), E. Dell Smith or registered
assigns  (the  "Holder"),  is hereby  granted  the right to purchase at any time
until  5:00 P.M.,  New York City time,  on  October  24,  2002 (the  "Expiration
Date"),  ten  thousand  (10,000)  fully  paid and  nonassessable  shares  of the
Company's  Common  Stock,  par value $.01 per share (the  "Common  Stock") at an
initial exercise price of $2.00 per share (the "Exercise Price").

                  2. Exercise of Warrants.  This Warrant is exercisable in whole
or in part at the Exercise  Price per share of Common Stock  payable  hereunder,
payable in cash or by certified or official bank check.  Upon  surrender of this
Warrant  Certificate  with the annexed  Notice of Exercise  Form duly  executed,
together  with  payment of the  Exercise  Price for the  shares of Common  Stock
purchased, the Holder shall be entitled to receive a certificate or certificates
for the shares of Common Stock so purchased.

                  3.  Reservation  of Shares.  The Company hereby agrees that at
all times during the term of this  Warrant  there shall be reserved for issuance
upon exercise of this Warrant
<PAGE>

such number of shares of its Common Stock as shall be required for issuance upon
exercise of this Warrant (the "Warrant Shares").

                  4. Mutilation or Loss of Warrant.  Upon receipt by the Company
of evidence satisfactory to it of the loss, theft,  destruction or mutilation of
this  Warrant,  and (in the  case of  loss,  theft or  destruction)  receipt  of
reasonably  satisfactory  indemnification,  and (in the case of mutilation) upon
surrender and cancellation of this Warrant, the Company will execute and deliver
a new  Warrant of like tenor and date and any such lost,  stolen,  destroyed  or
mutilated Warrant shall thereupon become void.

                  5.  Rights of the  Holder.  The Holder  shall  not,  by virtue
hereof, be entitled to any rights of a stockholder in the Company, either at law
or equity,  and the rights of the Holder are limited to those  expressed in this
Warrant and in the Consulting Agreement between the Company and Libra Finance SA
pursuant  to  which  this  Warrant  was  originally   issued  (the   "Consulting
Agreement") and are not enforceable against the Company except to the extent set
forth herein and therein.

                  6. Transfer to Comply with the  Securities  Act;  Registration
Rights.

                         6.1 This  Warrant  has not been  registered  under  the
Securities  Act of 1933,  as  amended,  (the  "Act") and has been  issued to the
Holder  for  investment  and not with a view to the  distribution  of either the
Warrant or the  Warrant  Shares.  Neither  this  Warrant  nor any of the Warrant
Shares or any other  security  issued or issuable  upon exercise of this Warrant
may  be  offered,  sold,  transferred,  pledged,  encumbered,   hypothecated  or
otherwise  disposed of in the  absence of an  effective  registration  statement
under the Act relating to such security or an opinion of counsel satisfactory to
the Company that  registration  is not required under the Act. Each  certificate
for the Warrant,  the Warrant Shares and any other  security  issued or issuable
upon exercise of this Warrant  shall  contain a legend on the face  thereof,  in
form and substance  satisfactory  to counsel for the Company,  setting forth the
restrictions on transfer contained in this Section.

                         6.2 The Company  hereby grants to the Holder  piggyback
registration  rights  with  respect to the Warrant  Shares  which  rights  shall
commence after the date of issuance of this Warrant. In the event the Company is
filing  a  registration  statement  for  itself  or on  behalf  of  any  of  its
shareholders  at any time after the date  hereof,  the Company  shall notify the
Holder in writing  reasonably  in advance of such  filing (but at least five (5)
business days) and give the Holder the opportunity to include all or any portion
of  the  Warrant  Shares  (whether  or not  previously  issued,  to  the  extent
permissible under the Act or any regulation  promulgated  thereunder).  Upon the
Holder's  notification that the Holder desires to have all or any portion of the
Warrant Shares included in such  registration,  the Company shall, at no cost or
expense to the  Holder,  include or cause to be  included  in such  registration
statement the Warrant  Shares so identified  by the Holder,  provided,  however,
that if, in the opinion of the Company's  managing  underwriter or underwriters,
if any, for such offering,  the inclusion of the Warrant  Shares,  when added to
the securities  being  registered by the Company or any selling  stockholder(s),
will
<PAGE>

exceed the maximum amount of the Company's  securities  that can be marketed (x)
at a price reasonably related to their then current market value, or (y) without
materially  and adversely  affecting the entire terms of the offering,  then the
number of shares to be included  in such  offering  shall be  reduced,  and such
shares shall be excluded from such offering in a number deemed necessary by such
managing  underwriter  or  underwriters,  based  upon and  subject to a pro rata
reduction of the number of Warrant Shares the Holder of such securities proposed
to include therein.

                  7.  Notices.  Any notice or other  communication  required  or
permitted  hereunder  shall be in  writing  and shall be  delivered  personally,
telegraphed,  telexed,  sent by  facsimile  transmission  or sent by  certified,
registered or express mail,  postage  pre-paid.  Any such notice shall be deemed
given when so delivered  personally,  telegraphed,  telexed or sent by facsimile
transmission,  or, if  mailed,  two (2) days  after the date of  deposit  in the
United States mails, as follows:

(1)      if the to Company, to:

                                    Xybernaut Corporation
                                    12701 Fair Lakes Circle
                                    Suite 550
                                    Fairfax, Virginia 22033
                                    Attn: Chief Financial Officer
                                    Fax No.:  (703) 631-3903

(2)      if to the Holder, to:

                                    E. Del Smith and Company, Inc.
                                    1130 Connecticut Avenue, N.W.
                                    Suite 650
                                    Washington, DC 20036
                                    Attn:  E. Del Smith
                                    Fax No.:

Any party may be  notice  given in  accordance  with this  Section  to the other
parties designate another address or person for receipt of notices hereunder.

                  8. Supplements and Amendments;  Whole Agreement.  This Warrant
may be amended or  supplemented  only by an instrument in writing  signed by the
parties hereto. This Warrant of even date herewith and the Consulting  Agreement
contain the full understanding of the parties hereto with respect to the subject
matter  hereof  and  thereof  and  there  are  no  representations,  warranties,
agreements or understandings other than expressly contained herein and therein.

<PAGE>

                  9.  Governing  Law.  This  Warrant  shall  be  deemed  to be a
contract made under the laws of the State of New York and for all purposes shall
be  governed  by and  construed  in  accordance  with  the  laws of  such  State
applicable to contracts to be made and performed entirely within such State.

                  10. Descriptive Headings.  Descriptive headings of the several
Sections of this Warrant are inserted for convenience only and shall not control
or affect the meaning or construction of any of the provisions hereof.


         IN WITNESS WHEREOF, the parties hereto have executed this Warrant as of
October 25, 1999.


                            XYBERNAUT CORPORATION



                            By:_______________________________________
                               Name: Steven A. Newman
                               Title: Vice Chairman

Attest:

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

- ----------------------------
Chief Administrative Officer



<PAGE>




                          NOTICE OF EXERCISE OF WARRANT

         The  undersigned  hereby  irrevocably  elects to  exercise  the  right,
represented by the Warrant Certificate dated as of __________, 2000, to purchase
__________  shares of the Common Stock,  par value $.01 per share,  of Xybernaut
Corporation  and tenders  herewith  payment in accordance with Section 1 of said
Common Stock Purchase Warrant.

         Please deliver the stock certificate to:





Dated:______________________




                                          By:__________________________________








                                                                    EXHIBIT 4.4

THE SECURITIES  REPRESENTED BY THIS  CERTIFICATE  HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT") OR ANY STATE SECURITIES LAWS.
SUCH  SECURITIES  MAY NOT BE OFFERED FOR SALE,  SOLD OR  OTHERWISE  TRANSFERRED,
ASSIGNED,  PLEDGED OR HYPOTHECATED EXCEPT PURSUANT TO AN EFFECTIVE  REGISTRATION
STATEMENT UNDER THE ACT, OR PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE
ACT AND APPLICABLE STATE SECURITIES LAWS.

THE REGISTERED HOLDER OF THIS WARRANT, BY ITS ACCEPTANCE HEREOF,  AGREES THAT IT
WILL NOT SELL,  TRANSFER,  ASSIGN,  PLEDGE OR HYPOTHECATE THIS WARRANT EXCEPT AS
HEREIN PROVIDED.


         VOID AFTER 5:00 P.M. EASTERN STANDARD TIME ON OCTOBER 21, 2001.

No. 2                                                     As of October 22, 1996

                          COMMON STOCK PURCHASE WARRANT
                          -----------------------------

                For the Purchase of 30,000 Shares of Common Stock

                                       of

                              XYBERNAUT CORPORATION
                            (a Delaware corporation)

1.       Warrant.
         --------

         This  certifies   that   CHRISTINA  S.  KOHLHAAS   (together  with  any
transferees  as permitted by Section 3 hereof,  the "Holder") is the  registered
owner of this  Common  Stock  Purchase  Warrant  (the  "Warrant")  of  XYBERNAUT
CORPORATION,  a Delaware  corporation (the "Company").  Subject to the terms and
provisions set forth herein,  the Holder is entitled,  at any time and from time
to time from the date hereof  until 5:00 p.m.,  New York City time,  October 21,
2001, but not thereafter, to subscribe for, purchase and receive, in whole or in
part, up to THIRTY  THOUSAND  (30,000)  shares of Common Stock,  $0.01 par value
(the "Common  Stock"),  of the Company.  If October 21, 2001,  is a day on which
banking  institutions  are authorized by law to close,  then this Warrant may be
exercised on the next  succeeding day that is not such a day in accordance  with
the terms and provisions hereof. This Warrant is exercisable as to each share of
Common Stock covered  hereby at the price per share (the  "Exercise  Price") set
forth in Section 2 hereof.  The term  "Exercise  Price"  shall mean the  initial
exercise  price,  or such exercise  price as adjusted in the manner  provided in
Sections 2 and 6 hereof, depending on the context.
<PAGE>

2.       Exercise.

         2.1 Restrictions on Exercise; Exercise Price. This Warrant shall become
exercisable:

          (1)  immediately  as to 10,000 shares of Common Stock,  at an Exercise
               Price of $4.25 per share;

          (2)  as to an  additional  10,000  shares of  Common  Stock on the day
               after the closing bid price of the Common Stock equals or exceeds
               $11.00 per share for 25 consecutive trading days or for 30 out of
               35  consecutive  trading days, at an Exercise Price of $11.00 per
               share; and

          (3)  as to an  additional  10,000  shares of  Common  Stock on the day
               after the closing bid price of the Common Stock equals or exceeds
               $18.00 per share for 20 consecutive  trading days, at an Exercise
               Price of $18.00 per share.

            If the rights represented hereby shall not be exercised at or before
5:00 p.m.,  New York City time,  on October 21, 2001,  this Warrant shall become
and be void and  without  further  force or effect  and all  rights  represented
hereby shall cease and expire.

         2.2 Exercise Procedure. In order to exercise this Warrant, the exercise
form attached hereto must be duly executed, guaranteed,  completed and delivered
to the Company (to the  attention of the  Company's  Chief  Financial  Officer),
together  with this Warrant and payment of the Exercise  Price for the shares of
the Common Stock being  purchased.  The payment of the  Exercise  Price shall be
made by a certified check or bank check payable to the order of the Company.

3.       Restrictions on Transfer; Registration of Transfers.
         ----------------------------------------------------

         3.1 Restrictions on Transfer. The registered Holder of this Warrant, by
her  acceptance  hereof,  agrees  that this  Warrant  shall not be  transferable
without the prior written consent of the Company,  which consent may be withheld
in the  Company's  sole  discretion;  provided,  however,  that the  Holder  may
transfer all or any part of this Warrant or any  securities  purchased  upon the
exercise of all or any part of this Warrant to CSK  Securities  Research or Neal
J. Kohlhaas;  provided further,  that prior to any such permitted  transfer,  if
such transfer is not made pursuant to an effective  registration statement under
the  Securities  Act of 1933,  as  amended  (the  "Act"),  the Holder  will,  if
requested by the Company, deliver to the Company:

          (1)  an opinion of counsel  satisfactory in form,  substance and scope
               to the Company that this Warrant or the securities purchased upon
               the  exercise  of  this  Warrant  may  be   transferred   without
               registration  under the Act and any applicable  state  securities
               laws;
<PAGE>

          (2)  an agreement by the proposed  transferee to the impression of the
               restrictive  investment legend set forth below on this Warrant or
               the securities to be received upon the exercise thereof;

          (3)  an  agreement  by such  transferee  that the  Company may place a
               notation in the stock  books of the  Company or a "stop  transfer
               order" with any transfer  agent or registrar  with respect to the
               securities purchased upon the exercise of this Warrant; and

          (4)  an  agreement  by such  transferee  to be bound by the  terms and
               provisions of this Warrant  (including,  without  limitation,  of
               this  Section 3 relating  to the  transfer  of all or any part of
               this Warrant or of the securities  purchased upon the exercise of
               this Warrant).

                  The  Holder  agrees  that this  Warrant  and each  certificate
representing securities purchased upon the exercise of this Warrant shall bear a
legend as follows unless such securities have been registered under the Act:

                  "The   securities   represented   by  this  warrant  and  each
                  certificate representing securities purchased upon exercise of
                  this warrant have not been registered under the Securities Act
                  of 1933,  as amended  (the  "Act"),  or any  applicable  state
                  securities  laws. Such securities may not be offered for sale,
                  sold  or   otherwise   transferred,   assigned,   pledged   or
                  hypothecated  except  pursuant  to an  effective  registration
                  statement  under the Act,  or pursuant  to an  exemption  from
                  registration  under the Act and pursuant to  applicable  state
                  securities laws."

         3.2 Registration of Transfers.  In order to make any permitted transfer
or  assignment  of this  Warrant,  the Holder  must  deliver to the  Company the
assignment  form  attached  hereto  duly  executed,  guaranteed  and  completed,
together with this Warrant and payment of all transfer taxes, if any, payable in
connection therewith.  Payment of any applicable transfer taxes shall be made by
certified  check  or bank  check  payable  to the  Company.  The  Company  shall
thereafter  transfer  such  portion  of  this  Warrant  as is  specified  in the
assignment  form on the books of the Company and shall execute and deliver a new
warrant  or  warrants  of  like  tenor  with  this  Warrant  to the  appropriate
transferee(s) expressly evidencing the right to purchase the number of shares of
Common  Stock  purchasable  hereunder or such portion of such number as shall be
contemplated by such transfer.

4.       New Warrants to be Issued.
         --------------------------

         4.1 Partial Exercise or Transfer. Subject to the restrictions set forth
in Sections 2 and 3 hereof,  this  Warrant may be exercised  or  transferred  in
whole or in part. In the event of the exercise or transfer  hereof in part only,
upon surrender of this Warrant for cancellation, together with the duly executed
exercise or assignment  form and funds  sufficient to pay any required

<PAGE>

transfer  tax, the Company  shall cause to be  delivered  to the Holder  without
charge a new warrant or new warrants of like tenor with this Warrant in the name
of the Holder evidencing the right to purchase, in the aggregate,  the remaining
number of underlying shares of Common Stock  purchasable  hereunder after giving
effect to any such partial exercise or transfer.

         4.2 Lost or Destroyed Warrant.  Upon receipt by the Company of evidence
satisfactory  to the  Company,  in its  sole  discretion,  of the  loss,  theft,
destruction or mutilation of this Warrant and of an  indemnification in favor of
the Company reasonably satisfactory to it, the Company shall execute and deliver
a new  warrant  of like  tenor  and date.  Any such new  warrants  executed  and
delivered  as a result of such loss,  theft,  mutilation  or  destruction  shall
represent the exact same  contractual  obligations on the part of the Company as
are represented by this Warrant.

5.       Registration Rights.
         --------------------

         5.1 "Piggy-Back" Registration.

              (1) Grant of Right.

                  (i)      The Holder of this Warrant  shall have the right (the
                           "Piggy-Back  Right")  for a period of three (3) years
                           beginning   on  the  date  hereof  (the   "Piggy-Back
                           Period"),  to  include  all of the  shares  of Common
                           Stock  underlying  such  Warrant  (the   "Registrable
                           Securities")   as   part  of  any   registration   of
                           securities  filed  by  the  Company  (other  than  in
                           connection  with a transaction  contemplated  by Rule
                           145(a)  promulgated under the Act or pursuant to Form
                           S-8); provided,  however,  that if, in the opinion of
                           the Company's  managing  underwriter or underwriters,
                           if any,  for  such  offering,  the  inclusion  of the
                           Registrable Securities,  when added to the securities
                           being  registered  by  the  Company  or  any  selling
                           stockholder(s), will exceed the maximum amount of the
                           Company's  securities  that can be marketed  (x) at a
                           price reasonably related to their then current market
                           value,  or  (y)  without   materially  and  adversely
                           affecting the entire terms of the offering,  then the
                           number  of  shares to be  included  in such  offering
                           shall be reduced,  and such shares  shall be excluded
                           from such  offering in a number  deemed  necessary by
                           such managing underwriter or underwriters, based upon
                           and subject to a pro rata  reduction of the number of
                           Registrable  Securities the Holder of such securities
                           proposed to include therein.

                  (ii)     In the event  that the  Holder is unable to  exercise
                           her  Piggy-Back  Right  due  to  the  failure  of the
                           Company to register any of its securities  within the
                           Piggy-Back    Period,    the   Company   shall,    as
<PAGE>


                           expeditiously as practicable following the expiration
                           of the Piggy-Back  Period,  register the  Registrable
                           Securities  by  preparing  and filing a  registration
                           statement  on  Form  S-8 or such  other  registration
                           statement  form  as  may  then  be  available  to the
                           Company.

         (2)      Terms. The Company shall bear all fees and expenses  attendant
                  to  registering  the  Registrable  Securities,  but the Holder
                  shall pay any and all underwriting  commissions,  the expenses
                  of any legal counsel selected by the Holder to represent it in
                  connection  with the sale of the  Registrable  Securities  and
                  applicable  transfer  taxes,  if any.  In the  event of such a
                  proposed  registration,  the  Company  shall  furnish the then
                  Holder of  outstanding  Registrable  Securities  with not less
                  than thirty (30) days  written  notice  prior to the  proposed
                  date of filing of such registration  statement.  If the Holder
                  desires to exercise  her  Piggy-Back  Right,  the Holder shall
                  furnish the Company  written  notice,  within twenty (20) days
                  after the receipt of the Company's  notice of its intention to
                  file a registration statement, specifying the number of shares
                  of Registrable Securities the Holder intends to sell.

         (3)      Information Furnished by and Representations of the Holder. It
                  shall be a condition precedent to the Company's obligations to
                  the  Holder of the  Registrable  Securities  pursuant  to this
                  Section 5 that she  furnish to the  Company  in  writing  such
                  information regarding herself and the distribution proposed by
                  her as the Company may reasonably  request.  Additionally,  in
                  connection with a proposed  registration under this Section 5,
                  the Holder  represents  and  warrants to the Company  that she
                  will use her best efforts to comply with all applicable  rules
                  and regulations of the Securities and Exchange  Commission and
                  will make such  representations  and warranties to the Company
                  and the underwriters, in each case, as are customarily made by
                  selling shareholders to issuers and underwriters,  as the case
                  may be, in underwritten public offerings.

         5.2  Indemnification.  The Company  shall  indemnify  the Holder of the
Registrable  Securities  to be  sold  pursuant  to  any  registration  statement
described herein and each person, if any, who controls such Holder ("Controlling
Persons")  within the  meaning of Section 15 of the Act or Section  20(a) of the
Securities  Exchange Act of 1934, as amended (the "Exchange  Act"),  against all
loss, claim, damage,  expense or liability (including all reasonable  attorneys'
fees and other  expenses  reasonably  incurred in  investigating,  preparing  or
defending  against any claim whatsoever) to which any of them may become subject
under the Act,  the Exchange Act or  otherwise,  arising from such  registration
statement;  provided, however, that the Company will not be liable to the extent
that any loss,  claim,  damage,  expense or liability  arises out of information
furnished  by or on behalf of such  Holder,  or her  successors  or assigns,  in
writing,  for specific inclusion in such registration  statement.  The Holder of
the Registrable  Securities to be
<PAGE>

sold pursuant to such  registration  statement,  and her successors and assigns,
shall  severally  (with the other holders of  Registrable  Securities),  and not
jointly,  indemnify  the Company and each of its  officers,  directors,  agents,
employees and Controlling Persons,  against all loss, claim, damage,  expense or
liability   (including  all  reasonable   attorneys'  fees  and  other  expenses
reasonably  incurred in investigating,  preparing or defending against any claim
whatsoever)  to which they may become subject under the Act, the Exchange Act or
otherwise, arising from information furnished by or on behalf of such Holder, or
her  successors  or  assigns,  in  writing,   for  specific  inclusion  in  such
registration statement.

6.       Adjustments to Exercise Price and Number of Securities.
         -------------------------------------------------------

         6.1 Subdivision and Combination.  In case the Company shall at any time
subdivide or combine the outstanding  shares of Common Stock, the Exercise Price
shall  forthwith  be  proportionately  decreased in the case of  subdivision  or
increased in the case of combination.

         6.2  Adjustment  in  Number of  Shares.  Upon  each  adjustment  of the
Exercise  Price  pursuant  to the  provisions  of this  Section 6, the number of
shares of Common  Stock  issuable  upon the  exercise of this  Warrant  shall be
adjusted to the nearest full number  obtained by multiplying  the Exercise Price
in effect immediately prior to such adjustment by the number of shares of Common
Stock  issuable  upon  exercise  of  this  Warrant  immediately  prior  to  such
adjustment and dividing the product so obtained by the adjusted Exercise Price.

         6.3 Recapitalization. For the purpose of this Warrant, the term "Common
Stock"  shall  also  mean any other  class of stock  resulting  from  successive
changes or reclassifications of Common Stock consisting solely of changes in par
value, or from par value to no par value, or from no par value to par value.

         6.4  Merger  or  Consolidation.  In  case of any  consolidation  of the
Company with, or merger of the Company with or into, another  corporation (other
than a consolidation or merger which does not result in any  reclassification or
change  of the  outstanding  Common  Stock),  the  corporation  formed  by  such
consolidation  or merger shall execute and deliver to the Holder a  supplemental
warrant  providing  that the holder of each  warrant then  outstanding  or to be
outstanding shall have the right thereafter (until the stated expiration of such
warrant)  to receive,  upon  exercise  of such  warrant,  the kind and amount of
shares  of  stock  and  other  securities  and  property  receivable  upon  such
consolidation or merger,  by a holder of the number of shares of Common Stock of
the Company for which such warrants might have been exercised  immediately prior
to such  consolidation,  merger,  sale or transfer.  Such supplemental  warrants
shall  provide for  adjustments  which  shall be  identical  to the  adjustments
provided in this Section 6. The above provisions of this Section shall similarly
apply to successive consolidations or mergers.

         6.5 No Adjustment of Exercise Price in Certain Cases.  No adjustment of
the Exercise Price shall be made:

<PAGE>


                  (1)      Upon the  issuance  or sale of the  shares  of Common
                           Stock issuable upon the exercise of (i) this Warrant,
                           or (ii) any options  granted  under any stock  option
                           plan of the Company; or

                  (2)      If the amount of said  adjustment  shall be less than
                           two cents ($.02) per share of Common Stock; provided,
                           however, that in such case, any adjustment that would
                           otherwise  be  required  then  to be  made  shall  be
                           carried  forward and shall be made at the time of and
                           together with the next subsequent  adjustment  which,
                           together  with any  adjustment  so  carried  forward,
                           shall  amount to at least two cents  ($.02) per share
                           of Common Stock.

         6.6  Redemption  of Warrants.  This  Warrant  cannot be redeemed by the
Company without the prior written consent of the Holder.


         6.7  Dividends and Other  Distributions.  In the event that the Company
shall at any time  prior  to the  exercise  in full of this  Warrant  declare  a
non-cash  dividend (other than a dividend  consisting solely of shares of Common
Stock) or otherwise distribute to its stockholders any assets, property, rights,
evidences  of  indebtedness,  securities  (other than  shares of Common  Stock),
whether  issued by the Company or by another,  or any other thing of value other
than cash, the Holder of this Warrant shall thereafter be entitled,  in addition
to the shares of Common Stock or other  securities and property  receivable upon
the exercise thereof,  to receive,  upon the exercise of such Warrant,  the same
property,  assets,  rights,  evidences of indebtedness,  securities or any other
thing of value that it would have been  entitled  to receive at the time of such
dividend or distribution as if this Warrant had been exercised immediately prior
to  such  dividend  or  distribution.  At the  time  of  any  such  dividend  or
distribution,  the Company shall make appropriate  reserves to ensure the timely
performance of the provisions of this Section 6.7.

         6.8  Elimination  of  Fractional  Interests.  The Company  shall not be
required to issue certificates  representing fractions of shares of Common Stock
upon the  exercise of this  Warrant,  nor shall it be required to issue scrip or
pay cash in lieu of any fractional interests, it being the intent of the parties
that all fractional interests shall be eliminated by rounding any fraction up to
the  nearest  whole  number  of  shares  of  Common  Stock or other  securities,
properties or rights as shall be issuable upon the exercise hereof.

         6.9  Reservation.  The  Company  shall at all  times  reserve  and keep
available out of its authorized  shares of Common Stock,  solely for the purpose
of issuance upon exercise of this Warrant, such number of shares of Common Stock
or other securities, properties or rights as shall be issuable upon the exercise
hereof. The Company covenants and agrees that, upon exercise of this Warrant and
payment of the  Exercise  Price  therefor,  all shares of Common Stock and other
securities,  properties or rights  issuable upon such exercise shall be duly and
validly issued, fully paid and nonassessable.

7.       Certain Notice Requirements.
         ----------------------------
<PAGE>

         7.1 Holder's  Right to Receive  Notice.  Except as set forth in Section
8.2 hereof,  nothing herein shall be construed as conferring upon the Holder the
right to vote or consent or to receive notice as a stockholder  for the election
of  directors  or any other  matter,  or as having  any rights  whatsoever  as a
stockholder of the Company.

         7.2 Notice of Change in Exercise  Price.  The Company  shall,  promptly
after an event  requiring a change in the Exercise  Price  pursuant to Section 6
hereof,  send written  notice to the Holder of such event and change (the "Price
Notice").  The Price Notice shall  describe the event causing the change and the
method  of  calculating  same  and  shall be  prepared  by the  Company's  Chief
Financial Officer.

         7.3 Transmittal of Notices. All notices,  requests,  consents and other
communications  under or relating to this Warrant  shall be in writing and shall
be deemed to have been duly given or made when hand delivered, or when delivered
by a recognized overnight courier:

                  (1)      if to the registered Holder of this Warrant,  to: CSK
                           Securities   Research   25  Woodview   Lane   Novato,
                           California 94945 Attention: Christina S. Kohlhaas

                  (2)      if to the Company, to:
                           Xybernaut Corporation
                           12701 Fair Lakes Circle, Suite 550
                           Fairfax, Virginia 22033
                           Attention: Edward G. Newman

                           with a copy to:
                           Parker Chapin Flattau & Klimpl, LLP
                           1211 Avenue of the Americas
                           New York, New York  10036-8735
                           Attention: Martin E. Weisberg, Esq.

Either of the Holder or the Company may change the foregoing address by a notice
given in the manner provided in this Section 8.4.

8.       Miscellaneous.
         --------------

         8.1  Amendments.  This Warrant may not be amended,  altered or modified
except by a written instrument duly executed by the Company and the Holder.

<PAGE>

         8.2 Headings. The headings contained herein are for the sole purpose of
convenience  of reference,  and shall not in any way limit or affect the meaning
or interpretation of any of the terms or provisions of this Warrant.

         8.3 Entire Agreement.  This Warrant, together with the other agreements
and documents  being  executed and delivered  pursuant to or in connection  with
this Warrant, constitute the entire agreement of the parties hereto with respect
to the  subject  matter  hereof,  and  supersede  all prior and  contemporaneous
agreements and understandings of the parties,  oral and written, with respect to
the subject matter hereof, all of which are merged herein.

         8.4 Binding  Effect.  This Warrant shall inure solely to the benefit of
and  shall be  binding  upon  the  Holder  and the  Holder's  heirs,  executors,
administrators,  distributees,  successors and permitted  assigns,  and upon the
Company and its  successors  and  assigns,  and no other person shall have or be
construed  to have any legal or  equitable  right,  remedy or claim  under or in
respect of or by virtue of this Warrant or any provisions herein contained.

         8.5 Governing Law;  Submission to  Jurisdiction.  This Warrant shall be
governed by and construed and enforced in accordance  with the laws of the State
of  Delaware,  without  giving  effect to its conflict of laws  principles.  Any
action,  suit or proceeding  against the Company or the Holder arising out of or
relating in any way to this Warrant  shall be brought and enforced in the courts
of the State of New York (located in New York County) or of the United States of
America for the  Southern  District of New York,  and the Company and the Holder
irrevocably submit to such  jurisdiction,  which jurisdiction shall be exclusive
for all  purposes  relating  to this  Warrant.  The  parties  hereto  waive  any
objection  to such  exclusive  jurisdiction  and that such courts  represent  an
inconvenient forum. The prevailing party in any such action shall be entitled to
recover from the other party all of its reasonable  attorneys' fees and expenses
relating to such action,  suit or proceeding  and/or incurred in connection with
the preparation therefor.  The Holder and the Company waive their right to trial
by jury with respect to any such action, suit or proceeding.

         8.6  Waiver,  Etc.  The  failure of the Company or the Holder to at any
time  enforce  any of the  provisions  of this  Warrant  shall  not be deemed or
construed  to be a waiver of any such  provision,  nor to in any way  affect the
validity of this Warrant or any provision  hereof or the right of the Company or
the Holder to thereafter  enforce each and every  provision of this Warrant.  No
waiver of any breach,  noncompliance or  nonfulfillment of any of the provisions
of this  Warrant  shall be  effective  unless set forth in a written  instrument
executed  by the party or  parties  against  whom or which  enforcement  of such
waiver  is  sought;  and  no  waiver  of  any  such  breach,   noncompliance  or
nonfulfillment  shall be  construed  or  deemed  to be a waiver  of any other or
subsequent breach, noncompliance or nonfulfillment.

         8.7 Severability. In the event that any provision of this Warrant shall
be determined to be illegal or unenforceable,  the remaining  provisions of this
Warrant shall remain binding and in full force and effect.
<PAGE>

                  IN WITNESS WHEREOF,  the Company has caused this Warrant to be
signed by its duly authorized officer as of October 22, 1996.

                                     XYBERNAUT CORPORATION


                                     By:_________________________________
                                         Name:  Edward G. Newman
                                         Title:    President and Chief Executive
      Officer


<PAGE>


                              XYBERNAUT CORPORATION

                       Form to be used to exercise Warrant
                       -----------------------------------


XYBERNAUT CORPORATION
12701 Fair Lakes Circle, Suite 550
Fairfax, Virginia 22033

Date: ________________, 19__

                  The undersigned, the registered holder of the Warrant enclosed
herewith,  hereby  elects  irrevocably  to  exercise  the within  Warrant and to
purchase __________ shares of Common Stock of Xybernaut Corporation,  a Delaware
corporation,  and  hereby  makes  payment  of  $_____________  (at  the  rate of
$______________  per share) in payment of the Exercise Price  pursuant  thereto.
Please issue the shares as to which the Warrant is exercised in accordance  with
the instructions given below.


                                    ------------------------------------
                                    Signature



                                    ------------------------------------
                                    Signature Guaranteed



                   INSTRUCTIONS FOR REGISTRATION OF SECURITIES

Name
    ----------------------------------------------------------------------------
                            (Print in Block Letters)

Address
       -------------------------------------------------------------------------

                  NOTICE:  The signature to this form must  correspond  with the
name as written upon the face of the within Warrant in every particular, without
alteration or enlargement or any change whatsoever,  and must be guaranteed by a
bank  other  than a  savings  bank,  by a  trust  company,  or by a firm  having
membership on a registered national securities exchange.


<PAGE>


                              XYBERNAUT CORPORATION

                        Form to be used to assign Warrant
                        ---------------------------------


                                   ASSIGNMENT

                  (To be executed by the registered  Holder to effect a transfer
of the within Warrant):

                  FOR  VALUE  RECEIVED,  ________________________________  , the
registered holder of the Warrant enclosed herewith, does hereby sell, assign and
transfer  unto  __________________________  the right to  purchase  ____________
shares of Common Stock of Xybernaut  Corporation,  a Delaware  corporation  (the
"Company"),  evidenced  by the within  Warrant  and does  hereby  authorize  the
Company to transfer such right on the books of the Company.

Dated:__________________, 199_


                                    ------------------------------------
                                    Signature



                                    ------------------------------------
                                    Signature Guaranteed


                  NOTICE:  The signature to this form must  correspond  with the
name as written upon the face of the within Warrant in every particular, without
alteration or enlargement or any change whatsoever,  and must be guaranteed by a
bank  other  than a  savings  bank,  by a  trust  company,  or by a firm  having
membership on a registered national securities exchange.






                                                                   EXHIBIT 4.5

THE SALE AND ISSUANCE OF THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT
BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES
ACT"), OR UNDER THE SECURITIES LAW OF ANY STATE OR OTHER  JURISDICTION.  NEITHER
THIS  SECURITY NOR ANY INTEREST OR  PARTICIPATION  HEREIN MAY BE OFFERED,  SOLD,
ASSIGNED, TRANSFERRED,  PLEDGED, ENCUMBERED,  HYPOTHECATED OR OTHERWISE DISPOSED
OF, UNLESS 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 UNDER THE SECURITIES ACT OR ANY APPLICABLE STATE SECURITIES LAWS.


                          COMMON STOCK PURCHASE WARRANT


                              XYBERNAUT CORPORATION


                             EXPIRES JANUARY 2, 2003


No.:                                                   Number of Shares:  5,000
Date of Issuance:  January 3, 2000


                  1.   Issuance.   In   consideration   of  good  and   valuable
consideration,  the  receipt  of  which  is  hereby  acknowledged  by  Xybernaut
Corporation, a Delaware corporation (the "Company"), E. Dell Smith or registered
assigns  (the  "Holder"),  is hereby  granted  the right to purchase at any time
until 5:00 P.M., New York City time, on January 2, 2003 (the "Expiration Date"),
five thousand (5,000) fully paid and  nonassessable  shares of the Company's
Common  Stock,  par value  $.01 per share  (the  "Common  Stock")  at an initial
exercise price of $2.00 per share (the "Exercise Price").

                  2. Exercise of Warrants.  This Warrant is exercisable in whole
or in part at the Exercise  Price per share of Common Stock  payable  hereunder,
payable in cash or by certified or official bank check.  Upon  surrender of this
Warrant  Certificate  with the annexed  Notice of Exercise  Form duly  executed,
together  with  payment of the  Exercise  Price for the  shares of Common  Stock
purchased, the Holder shall be entitled to receive a certificate or certificates
for the shares of Common Stock so purchased.

                  3.  Reservation  of Shares.  The Company hereby agrees that at
all times during the term of this  Warrant  there shall be reserved for issuance
upon exercise of this Warrant
<PAGE>

such number of shares of its Common Stock as shall be required for issuance upon
exercise of this Warrant (the "Warrant Shares").

                  4. Mutilation or Loss of Warrant.  Upon receipt by the Company
of evidence satisfactory to it of the loss, theft,  destruction or mutilation of
this  Warrant,  and (in the  case of  loss,  theft or  destruction)  receipt  of
reasonably  satisfactory  indemnification,  and (in the case of mutilation) upon
surrender and cancellation of this Warrant, the Company will execute and deliver
a new  Warrant of like tenor and date and any such lost,  stolen,  destroyed  or
mutilated Warrant shall thereupon become void.

                  5.  Rights of the  Holder.  The Holder  shall  not,  by virtue
hereof, be entitled to any rights of a stockholder in the Company, either at law
or equity,  and the rights of the Holder are limited to those  expressed in this
Warrant and in the Consulting Agreement between the Company and Libra Finance SA
pursuant  to  which  this  Warrant  was  originally   issued  (the   "Consulting
Agreement") and are not enforceable against the Company except to the extent set
forth herein and therein.

                  6. Transfer to Comply with the  Securities  Act;  Registration
Rights.

                         6.1 This  Warrant  has not been  registered  under  the
Securities  Act of 1933,  as  amended,  (the  "Act") and has been  issued to the
Holder  for  investment  and not with a view to the  distribution  of either the
Warrant or the  Warrant  Shares.  Neither  this  Warrant  nor any of the Warrant
Shares or any other  security  issued or issuable  upon exercise of this Warrant
may  be  offered,  sold,  transferred,  pledged,  encumbered,   hypothecated  or
otherwise  disposed of in the  absence of an  effective  registration  statement
under the Act relating to such security or an opinion of counsel satisfactory to
the Company that  registration  is not required under the Act. Each  certificate
for the Warrant,  the Warrant Shares and any other  security  issued or issuable
upon exercise of this Warrant  shall  contain a legend on the face  thereof,  in
form and substance  satisfactory  to counsel for the Company,  setting forth the
restrictions on transfer contained in this Section.

                         6.2 The Company  hereby grants to the Holder  piggyback
registration  rights  with  respect to the Warrant  Shares  which  rights  shall
commence after the date of issuance of this Warrant. In the event the Company is
filing  a  registration  statement  for  itself  or on  behalf  of  any  of  its
shareholders  at any time after the date  hereof,  the Company  shall notify the
Holder in writing  reasonably  in advance of such  filing (but at least five (5)
business days) and give the Holder the opportunity to include all or any portion
of  the  Warrant  Shares  (whether  or not  previously  issued,  to  the  extent
permissible under the Act or any regulation  promulgated  thereunder).  Upon the
Holder's  notification that the Holder desires to have all or any portion of the
Warrant Shares included in such  registration,  the Company shall, at no cost or
expense to the  Holder,  include or cause to be  included  in such  registration
statement the Warrant  Shares so identified  by the Holder,  provided,  however,
that if, in the opinion of the Company's  managing  underwriter or underwriters,
if any, for such offering,  the inclusion of the Warrant  Shares,  when added to
the securities  being  registered by the Company or any selling  stockholder(s),
will
<PAGE>

exceed the maximum amount of the Company's  securities  that can be marketed (x)
at a price reasonably related to their then current market value, or (y) without
materially  and adversely  affecting the entire terms of the offering,  then the
number of shares to be included  in such  offering  shall be  reduced,  and such
shares shall be excluded from such offering in a number deemed necessary by such
managing  underwriter  or  underwriters,  based  upon and  subject to a pro rata
reduction of the number of Warrant Shares the Holder of such securities proposed
to include therein.

                  7.  Notices.  Any notice or other  communication  required  or
permitted  hereunder  shall be in  writing  and shall be  delivered  personally,
telegraphed,  telexed,  sent by  facsimile  transmission  or sent by  certified,
registered or express mail,  postage  pre-paid.  Any such notice shall be deemed
given when so delivered  personally,  telegraphed,  telexed or sent by facsimile
transmission,  or, if  mailed,  two (2) days  after the date of  deposit  in the
United States mails, as follows:

(1)      if the to Company, to:

                                    Xybernaut Corporation
                                    12701 Fair Lakes Circle
                                    Suite 550
                                    Fairfax, Virginia 22033
                                    Attn: Chief Financial Officer
                                    Fax No.:  (703) 631-3903

(2)      if to the Holder, to:

                                    E. Del Smith and Company, Inc.
                                    1130 Connecticut Avenue, N.W.
                                    Suite 650
                                    Washington, DC 20036
                                    Attn:  E. Del Smith
                                    Fax No.:

Any party may be  notice  given in  accordance  with this  Section  to the other
parties designate another address or person for receipt of notices hereunder.

                  8. Supplements and Amendments;  Whole Agreement.  This Warrant
may be amended or  supplemented  only by an instrument in writing  signed by the
parties hereto. This Warrant of even date herewith and the Consulting  Agreement
contain the full understanding of the parties hereto with respect to the subject
matter  hereof  and  thereof  and  there  are  no  representations,  warranties,
agreements or understandings other than expressly contained herein and therein.

<PAGE>

                  9.  Governing  Law.  This  Warrant  shall  be  deemed  to be a
contract made under the laws of the State of New York and for all purposes shall
be  governed  by and  construed  in  accordance  with  the  laws of  such  State
applicable to contracts to be made and performed entirely within such State.

                  10. Descriptive Headings.  Descriptive headings of the several
Sections of this Warrant are inserted for convenience only and shall not control
or affect the meaning or construction of any of the provisions hereof.


         IN WITNESS WHEREOF, the parties hereto have executed this Warrant as of
January 3, 2000.


                            XYBERNAUT CORPORATION



                            By:_______________________________________
                               Name: Steven A. Newman
                               Title: Vice Chairman

Attest:

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

- ----------------------------
Chief Administrative Officer



<PAGE>




                          NOTICE OF EXERCISE OF WARRANT

         The  undersigned  hereby  irrevocably  elects to  exercise  the  right,
represented by the Warrant Certificate dated as of __________, 2000, to purchase
__________  shares of the Common Stock,  par value $.01 per share,  of Xybernaut
Corporation  and tenders  herewith  payment in accordance with Section 1 of said
Common Stock Purchase Warrant.

         Please deliver the stock certificate to:





Dated:______________________




                                          By:__________________________________







                                                                      EXHIBIT 5




                                                     April 3, 2000



Xybernaut Corporation
12701 Fair Lakes Circle
Fairfax, Virginia  22033

Gentlemen:

         We  have  acted  as  counsel  to  Xybernaut  Corporation,   a  Delaware
corporation  (the "Company"),  in connection with the Registration  Statement on
Form S-3 (the  "Registration  Statement")  being filed with the  Securities  and
Exchange  Commission  under the Securities Act of 1933, as amended,  relating to
the offering of 2,843,301  shares (the "Shares") of Common Stock, par value $.01
per share (the "Common Stock").

          In  connection  with the  foregoing,  we have  examined  originals  or
copies,  satisfactory to us, of the Company's (i)  Certificate of  Incorporation
and (ii)  By-laws.  We have also reviewed such other matters of law and examined
and relied upon all such corporate records,  agreements,  certificates and other
documents as we have deemed  relevant  and  necessary as a basis for the opinion
hereinafter expressed.  In such examination,  we have assumed the genuineness of
all signatures,  the authenticity of all documents  submitted to us as originals
and the conformity with the original documents of all documents  submitted to us
as copies or facsimiles.  As to any facts material to such opinion,  we have, to
the extent that relevant facts were not independently  established by us, relied
on  certificates  of public  officials  and  certificates  of  officers or other
representatives of the Company.

         Based upon and subject to the foregoing, we are of the opinion that the
Shares when sold will be validly issued, fully paid and non-assessable.

         We hereby  consent to the  filing of this  opinion as an exhibit to the
Registration  Statement and to the reference made to us under the caption "Legal
Matters" in the prospectus constituting part of the Registration Statement.

                                                           Very truly yours,

                                                           /s/ Parker Chapin LLP

                                                           PARKER CHAPIN LLP




                                                                    EXHIBIT 10.2

                    RESTATED BRIDGE LOAN FINANCING AGREEMENT
                    ----------------------------------------



         THIS RESTATED BRIDGE LOAN FINANCING AGREEMENT  ("Financing  Agreement")
is dated as of  October  18,  1999,  by and  between  XYBERNAUT  CORPORATION,  a
Delaware  corporation,  with  headquarters  located at 12701 Fair Lakes  Circle,
Suite 550, Fairfax,  Virginia 22033 (the "Company"),  and CRYSTALITE INVESTMENTS
LTD.,  having  an  office  at  111  Arlosorov  Street,  Tel  Aviv,  Israel  (the
"Investor").
                               W I T N E S S E T H
         WHEREAS,  the  Company  wishes to induce  the  Investor  to loan to the
Company,  and the  Investor  is willing to loan to the  Company,  subject to the
terms and conditions set forth herein, up to One Million ($1,000,000) Dollars.

         NOW, THEREFORE, for and in consideration of the premises and the mutual
agreement  contained herein and for other good and valuable  consideration,  the
receipt and  sufficiency  of which are hereby  acknowledged,  the parties hereto
agree as follows:

         1. LOAN.  Subject to the terms and  conditions  set forth  herein,  the
Investor shall loan to the Company One Million ($1,000,000) Dollars (the "Loan")
in one or more  installments,  by delivery of such amount to the Company in same
day U.S. funds by wire transfer to an account designated by the Company.

         2. NOTE.  The terms of the Loan shall be set forth in and  evidenced by
one or more Secured Promissory Note in substantially the form attached hereto as
Exhibit A in the aggregate

<PAGE>

amount of One Million ($1,000,000) Dollars, payable to the order of the Investor
or its assignees (the "Notes").

         3.       MUTUAL DELIVERIES.
                  ------------------

                  (a) Upon the  delivery by the  Investor  of the loan  proceeds
from time to time, as provided in Section 1 above,  the Company shall deliver to
the Investor the Notes.

                  (b) The Company shall also deliver,  or cause to be delivered,
the original or execution  copies of the following  instruments  and  agreements
duly executed by all parties thereto other than the Investor  (together with the
Notes - the "Related Agreements"):

                     (i) this  Agreement with the Security  Interest  Provisions
(Exhibit A);

                     (ii) the  Xybernaut  Common  Stock  Purchase  Warrants  for
1,000,000 shares in the form attached hereto as Exhibit B (the "Warrants"); and

                     (iii) the opinion of counsel in the form annexed  hereto as
Exhibit C.

         4.   REPRESENTATIONS  AND  WARRANTIES  OF  THE  COMPANY.   The  Company
represents and warrants to the Investor that:


                  (a) The Company has the corporate power and authority to enter
into this  Financing  Agreement  and the Related  Agreements  and to perform its
obligations hereunder and thereunder.  The execution and delivery by the Company
of this Financing  Agreement and the Related  Agreements and the consummation by
the Company of the transactions  contemplated  hereby and thereby have been duly
authorized by all necessary  corporate  action on the part of the Company.  This
Financing  Agreement  and the Related  Agreements  have been duly  executed  and
delivered by the Company and  constitute  valid and binding  obligations  of the
Company  enforceable  against  it in  accordance  with their  respective  terms,
subject to the effects of any
<PAGE>

applicable bankruptcy,  insolvency,  reorganization,  moratorium or similar laws
affecting  creditors'  rights  generally  and to the  application  of  equitable
principles in any proceeding (legal or equitable).

                  (b) The execution,  delivery and performance by the Company of
this Financing  Agreement and the Related Agreements and the consummation of the
transactions  contemplated  hereby  and  thereby  do not and will not  breach or
constitute a default under any applicable law or regulation or of any agreement,
judgment,  order, decree or other instrument binding on the Company which breach
or default could reasonably by expected to have a material adverse effect on the
Company.

                  (c) Except as set forth in Schedule  4(d) hereto,  the Company
is in material  compliance  with all applicable  laws,  regulations,  judgments,
decrees and orders material to the conduct of its business.

                  (d) Except as set forth in Schedule  4(d) hereto,  there is no
pending,   or  to  the   knowledge   of  the  Company,   threatened,   judicial,
administrative  or arbitral  action,  claim,  suit,  proceeding or investigation
which might affect the validity or enforceability of this Financing Agreement or
the Related  Agreements  or which  involves  the Company and which if  adversely
determined,  could  reasonably be expected to have a material  adverse effect on
the Company.

                  (e) No  consent or  approval  of, or  exemption  by, or filing
with,  any party or  governmental  or public  body or  authority  is required in
connection  with the execution,  delivery and  performance  under this Financing
Agreement  or the Related  Agreements  or the taking of any action  contemplated
hereunder or thereunder.
<PAGE>

                  (f)  The  Company  has  been  duly  organized  and is  validly
existing as a corporation in good standing under the laws of the jurisdiction of
its  incorporation.  The  Company is duly  qualified  and  licensed  and in good
standing  as a foreign  corporation  in each  jurisdiction  in which its current
ownership  or  leasing  of any  properties  or its  ownership  or leasing of any
properties or the character of its  operations as currently  conducted  requires
such  qualification  or  licensing,  except where the failure to be so qualified
would not have a material  adverse  effect on the  Company.  The Company has all
corporate  power and authority,  and has obtained all necessary  authorizations,
approvals,  orders, licenses,  certificates,  franchises and permits of and from
all  governmental or regulatory  officials and bodies  necessary to own or lease
its  properties  and  conduct  its  business  other than  those  authorizations,
approvals  and such other  documents  the lack of which could not  reasonably be
expected to have a material  adverse  effect on the Company.

                  (g) The execution,  delivery and performance of this Agreement
by the Company and the Related  Agreements  to be  delivered  hereunder  and the
consummation of the transactions  contemplated  hereby and thereby will not: (i)
violate any provision of the Company's articles of incorporation or bylaws, (ii)
violate, conflict with or result in the breach of any of the terms of, result in
a material modification of the effect of, otherwise,  give any other contracting
party the right to terminate,  or constitute (or with notice or lapse of time or
both  constitute) a default under,  any contract or other agreement to which the
Company is a party or by or to which the Company or any of the Company's  assets
or  properties  may be bound or  subject,  (iii)  violate  any order,  judgment,
injunction,  award  or  decree  of any  court,  arbitrator  or
<PAGE>

governmental  or  regulatory  body  by  which  the  Company,  or the  assets  or
properties of the Company are bound,  (iv) to the Company's  knowledge,  violate
any statute, law or regulation.

                  (h) Except as set forth in  Schedule  4(d)  hereto,  there has
been no material  change in the  capitalization,  assets,  or liabilities of the
Company  since the issuance of the financial  statements,  for the period ending
June 30, 1999, delivered to Investor.

         5. REPRESENTATIONS AND WARRANTIES OF THE INVESTOR.  The Investor hereby
represents and warrants to the Company that:

                  (a) The  Investor  has the  corporate  power and  authority to
enter into this  Financing  Agreement and the Related  Agreements and to perform
its  obligations  hereunder  and  thereunder.  The execution and delivery by the
Investor  of  this  Financial  Agreement  and  the  Related  Agreements  and the
consummation by the Investor of the transactions contemplated hereby and thereby
have been duly authorized by all necessary  corporate  action on the part of the
Investor.  This Financing  Agreement and the Related  Agreements  have been duly
executed  and  delivered  by the  Investor  and  constitute  valid  and  binding
obligations  of the Investor,  enforceable  against it in accordance  with their
respective  terms,  subject  to  the  effects  of  any  applicable   bankruptcy,
insolvency,  reorganization,  moratorium  or similar laws  affecting  creditors'
rights  generally  and  to  the  application  of  equitable  principles  in  any
proceeding (legal or equitable).

                  (b) The execution, delivery and performance by the Investor of
this Financing  Agreement and the Related Agreements and the consummation of the
transactions  contemplated  hereby  and  thereby  do not and will not  breach or
constitute a default under any applicable law or regulation or of any agreement,
judgment, order, decree or other instrument binding on the Investor.

<PAGE>

                  (c) There is no pending,  or to the knowledge of the Investor,
threatened, judicial, administrative or arbitral action, claim, suit, proceeding
or  investigation  which might  affect the  validity or  enforceability  of this
Financing Agreement or the Related Agreements.

                  (d) No  consent or  approval  of, or  exemption  by, or filing
with,  any party of  governmental  or public  body or  authority  is required in
connection  with the execution,  delivery and  performance  under this Financing
Agreement  or the Related  Agreements  or the taking of any action  contemplated
hereunder or thereunder.

                  (e) The Investor has prior substantial  investment experience,
including investment in non-listed and non-registered securities and has had the
opportunity  to engage  the  services  of an  investment  advisor,  attorney  or
accountant  to read all of the  documents  furnished  or made  available  by the
Company to the Investor in connection  with this  investment and to evaluate the
merits and risks of this investment.

         6. COVENANTS OF THE COMPANY.  The Company covenants and agrees that, so
long as the Note shall be  outstanding,  except as otherwise  required under the
Related Agreements, the Company shall:

                  (a) Promptly pay and discharge  all lawful taxes,  assessments
and  governmental  charges  or levies  imposed  upon it or upon its  income  and
profits, or upon any of its property, before the same shall become in default as
well as all lawful material  claims for labor,  materials and supplies which, if
unpaid,  might become a lien or charge upon such properties or any part thereof;
provided,  however,  that it shall not be required to pay and discharge any such
tax, assessment,  charge, levy or claim so long as the validity thereof shall be
contested in good

<PAGE>

faith by appropriate  proceedings,  and the Company shall set aside on its books
adequate  reserves  with respect to any such tax,  assessment,  charge,  levy or
claim so contested.

                  (b) Pay, or cause to be paid,  all material debts and perform,
or cause to be performed,  all material  obligations  promptly and in accordance
with the respective terms thereof.

                  (c) Implement and maintain a standard  system of accounting in
accordance with generally accepted accounting principles ("GAAP").

                  (d)  Provide to the  Investor  the  following:

                     (i) as soon as available  after the end of each fiscal year
of the Company,  a  consolidated  balance  sheet of the Company as at the end of
that fiscal year and the related statement of earnings, stockholders' equity and
changes in financial position of the Company for such fiscal year, in accordance
with GAAP and audited by independent  certified public accountants of recognized
standing; and

                     (ii) as soon as available  and in any event  within  ninety
(90) days after the end of each of the first three  quarters of each fiscal year
(commencing the quarter ending  September 30, 1999),  an unaudited  consolidated
balance  sheet of the  Company as of the end of that  quarter,  and the  related
unaudited statement of earnings of the Company for the period from the beginning
of that  fiscal  year to the end of that  quarter,  certified  by the  principal
financial  officer of the Company as having been  prepared  in  accordance  with
GAAP, subject to normal year-end adjustments.

                  (e) Do, or cause to be done,  all things that may be necessary
to (i) maintain its due  organization,  valid  existence and good standing under
the laws of its state of incorporation; (ii) preserve and keep in full force and
effect all qualifications,  registrations and licenses in those

<PAGE>

jurisdictions  in which  the  failure  to do so could or would  have a  material
adverse  effect;  (iii) maintain its power or authority to carry on its business
as now  conducted;  and (iv) use its best efforts to keep available the services
of its key present  employees and agents and maintain its current relations with
suppliers,  customers,  distributors and joint venture partners  (subject to the
business judgment of executive management).

                  (f) At all times maintain, preserve, protect and keep material
property used and useful in the conduct of its business in good repair,  working
order and  condition  (subject to normal  wear and tear),  and from time to time
make all needful and proper  repairs,  renewals,  replacements,  betterment  and
improvements  thereto,  so that the business carried on in connection  therewith
may be properly conducted at all times.

                  (g)  Keep  adequately  insured  all  property  of a  character
usually  insured by similar  corporations  and carry such other  insurance as is
usually carried by similar corporations.

                  (h) At all reasonable  times upon the  Investor's  request and
upon advance notice to the Company and for good reason,  permit  representatives
designated  by the Investor to have access to the books and records  relating to
the  operations  and  procedures  of  the  Company   (subject  to  execution  of
confidentiality  undertakings).

                  (i) Not assume, guaranty or otherwise, directly or indirectly,
become liable or responsible  for the obligations of any other person or entity,
except  for 75% or  greater  owned  subsidiaries,  for the  purpose of paying or
discharging  the  obligations  of such person or entity  unless such  guarantees
relate to the  business of the Company,  are incurred in the ordinary  course of
its business and do not exceed in the aggregate $100,000.

<PAGE>

                  (j) Not declare or pay any cash dividends or authorize or make
any other distribution on any class of equity securities of the Company,  except
for the Series D and Series E Convertible Preferred Stock.

                  (k) Not  consolidate  with or merge with or into any entity or
sell, lease, transfer, exchange or otherwise dispose of any material part of its
properties and assets except in the ordinary  course of business,  however,  the
Company  may  engage  in any of the  foregoing  transactions  with a  parent  or
subsidiary  of the  Company  so long as such  parent  or  subsidiary  is no less
creditworthy  than the  Company  and  such  parent  or  subsidiary  assumes  the
obligations of the Company hereunder.

                  (l) To  pay  to  the  Investor,  fifty  (50%)  percent  of the
proceeds  (after  related  expenses)  in excess of  $1,000,000  from any and all
financings, whether in the form of debt or equity.

         7. ASSIGNMENT.  This Financing Agreement and the Related Agreements may
be assigned by the Investor to  transferees  or assignees of the Note,  provided
that  the  Company  consents  to  the  assignment,  which  consent  will  not be
unreasonably  withheld, and that the Company is, prior to or simultaneously with
such  transfer,  furnished  with written  notice of the name and address of such
transferee or assignee,  and such assignee  agrees in writing to be bound by the
terms  hereof  and  provided  further  that,  if the  Note is only  assigned  or
transferred  in part,  then  such  assignment  shall  only be made in part on an
appropriate  proportionate  basis. If there is a conflict between this provision
and any provision of the Related Agreements, this provision shall govern.
<PAGE>

                  As a condition  to any such  assignment,  the  assignee  shall
warrant,  represent and acknowledge to the Company and to the Investor that: (i)
such assignee has adequate means of providing for its current needs and possible
contingencies,  and anticipates no need now or in the foreseeable future to sell
its shares of Common  Stock,  (ii) such assignee has had an  opportunity  to ask
questions of and receive  answers from the Company  concerning its investment as
evidenced by the Loan and Warrant (hereinafter  referred to as the "Investment")
in the  Company,  and  all  such  questions  have  been  answered  to  its  full
satisfaction, (iii) such assignee intends to hold the Warrant, and any shares of
the Common Stock issued upon the exercise of the Warrant, of the Company for its
own  account  for  investment,  and not with a view  toward  any resale or other
distribution of such Common Stock, (iv) the Investment in the Company involves a
high degree of risk, no tax  advantages  will result from the  Investment in the
Company,  and such  assignee  must be able to bear the economic risk of complete
loss of the  Investment  in the  Company,  (v) such  assignee  has  received  no
representations and warranties from Company other than those otherwise set forth
herein, and (vi) such assignee has the knowledge and experience in financial and
business  matters  and is  capable  of  evaluating  the  merits and risks of the
Investment, provided, however, if such assignee does not have such knowledge and
experience,  such assignee has consulted  with an attorney,  accountant or other
financial  consultant  or advisor,  as its  Purchaser  Representative,  and such
person is capable of evaluating  the risk of the  Investment  and of so advising
such assignee thereof.

         8. NOTICES.  Any notice required or permitted  hereunder shall be given
in writing (unless otherwise  specified herein) and shall be deemed  effectively
given upon personal  delivery or seven business days after deposit in the United
States  Postal  Service,  by (a) advance copy by

<PAGE>

fax, and (b) mailing by express  courier or  registered  or certified  mail with
postage  and fees  prepaid,  addressed  to each of the other  parties  thereunto
entitled at the following  addresses,  or at such other addresses as a party may
designate  by ten days  advance  written  notice  to each of the  other  parties
hereto.

COMPANY:          XYBERNAUT CORPORATION
                           12701 Fair Lakes Circle
                           Suite 550
                           Fairfax, Virginia 22033
                           ATT: Mr. Steven Newman, Vice Chairman
                           Telephone No.: (703) 631-6925
                           Facsimile No.:  (703) 631-6734
                           with a copy to:

                           Parker Chapin Flattau & Klimpl, LLP
                           1211 Avenue of the Americas
                           New York, New York 10036
                           ATTN: Martin Eric Weisberg, Esq.
                           Telephone No.: (212) 704-6000
                           Facsimile No.:  (212) 704-6288


PURCHASER:        At the address set forth on the signature page of this
                  Agreement.


ESCROW AGENT:     Krieger & Prager, Esqs.
                           39 Broadway, Suite 1440
                           New York, New York 10006
                           Telephone No.: (212) 363-2900
                           Facsimile No.: (212) 363-2999

         9. SEVERABILITY.  If a court of competent jurisdiction  determines that
any provision of this Financing  Agreement is invalid,  unenforceable or illegal
for any  reason,  such  determination  shall not affect or impair the  validity,
legality and enforceability of the other provisions of this Financing Agreement.
If any such  invalidity,  unenforceability  or illegality of a
<PAGE>

provision of this  Financing  Agreement  becomes known or apparent to any of the
parties  hereto,  the parties shall  negotiate  promptly and in good faith in an
attempt  to  make   appropriate   changes  and  adjustments  to  such  provision
specifically  and this  Financing  Agreement  generally to achieve as closely as
possible,  consistent  with  applicable  law,  the  intent  and  spirit  of such
provision specifically and this Financing Agreement generally.

         10. EXECUTION IN COUNTERPARTS. This Financing Agreement may be executed
in  counterparts,  each of which shall be deemed an  original,  but all of which
together shall constitute the same Financing Agreement.

         11. The Company  shall pay all fees and  disbursements  of the Investor
with  respect to the  preparation  and  enforcement  of this  Agreement  and the
Related Agreements.

         12.  GOVERNING LAW. This Agreement and the Related  Agreements shall be
governed by and construed in accordance  with the laws of the State of New York.
Each of the parties  consents to the  jurisdiction  of the federal  courts whose
districts  encompass any part of the City of New York or the state courts of the
State of New York sitting in the City of New York in connection with any dispute
arising under this Agreement and hereby waives,  to the maximum extent permitted
by law, any objection,  including any objection based on forum non coveniens, to
the bringing of any such proceeding in such jurisdictions.

         13. RESTATED AGREEMENT.  As hereby restated,  this Agreement supersedes
any prior  agreement  between the  parties  with  respect to the subject  matter
hereof,  and the Notes heretofore  delivered pursuant to this Agreement shall be
deemed amended in accordance with the provisions hereof.

<PAGE>

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


<PAGE>



         IN  WITNESS  WHEREOF,  the  parties  have  executed  this  Bridge  Loan
Financing Agreement as of the date first written above.

                                     XYBERNAUT CORPORATION



                                     By: ______________________________________
                                          Name: Steve Newman
                                          Title: Vice Chairman


                                    CRYSTALITE INVESTMENTS LTD.



                                     By: ______________________________________
                                         Name:
                                         Title:






                                                                   EXHIBIT 10.3

                         COMMON STOCK PURCHASE AGREEMENT
                         -------------------------------



         THIS COMMON STOCK PURCHASE AGREEMENT ("Purchase Agreement") is dated as
of  January  3,  2000,  by  and  between  XYBERNAUT   CORPORATION,   a  Delaware
corporation,  with headquarters  located at 12701 Fair Lakes Circle,  Suite 550,
Fairfax, Virginia 22033 (the "Company"), and DALSTON HOLDINGS LIMITED, having an
office at _____________________ (the "Investor").

                               W I T N E S S E T H

         WHEREAS,  the Company wishes sell to the Investor,  and the Investor is
willing to buy from the Company,  subject to the terms and  conditions set forth
herein, six hundred forty-seven thousand five hundred (647,500) shares of Common
Stock of the Company, par value $.01 per share.

         NOW, THEREFORE, for and in consideration of the premises and the mutual
agreement  contained herein and for other good and valuable  consideration,  the
receipt and  sufficiency  of which are hereby  acknowledged,  the parties hereto
agree as follows:

         1.       MUTUAL DELIVERIES.

                  (a)  Upon  the  delivery  by the  Investor  of the  sum of Two
Million Five Hundred  Ninety  Thousand and 00/100  ($2,590,000)  (the  "Purchase
Price"),  the Company shall deliver to the Investor one or more certificates for
647,500  shares of Common  Stock of the Company  (the  "Shares") at the price of
$4.00 per share, bearing substantially the following legend:

<PAGE>

       THE SECURITIES  REPRESENTED HEREBY (THE "SECURITIES") HAVE NOT
       BEEN  REGISTERED  UNDER THE SECURITIES ACT OF 1933, AS AMENDED
       (THE  "SECURITIES  ACT"),  OR THE SECURITIES LAWS OF ANY STATE
       AND MAY NOT BE SOLD OR OFFERED  FOR SALE IN THE  ABSENCE OF AN
       EFFECTIVE  REGISTRATION  STATEMENT  FOR THE  SECURITIES  OR AN
       OPINION  OF  COUNSEL  OR  OTHER  EVIDENCE  ACCEPTABLE  TO  THE
       CORPORATION THAT SUCH REGISTRATION IS NOT REQUIRED.

                  (b) The Company shall also deliver,  or cause to be delivered,
the original or execution copies of this Purchase Agreement.

         2.   REPRESENTATIONS  AND  WARRANTIES  OF  THE  COMPANY.   The  Company
represents and warrants to the Investor that:

                  (a) The Company has the corporate power and authority to enter
into this Purchase  Agreement,  and to perform its  obligations  hereunder.  The
execution  and  delivery  by the  Company  of this  Purchase  Agreement  and the
consummation by the Company of the  transactions  contemplated  hereby have been
duly  authorized by all necessary  corporate  action on the part of the Company.
This Purchase  Agreement has been duly executed and delivered by the Company and
constitute valid and binding  obligations of the Company  enforceable against it
in  accordance  with  their  respective  terms,  subject  to the  effects of any
applicable bankruptcy,  insolvency,  reorganization,  moratorium or similar laws
affecting  creditors'  rights  generally  and to the  application  of  equitable
principles in any proceeding (legal or equitable).

                  (b) The execution,  delivery and performance by the Company of
this Purchase Agreement,  and the consummation of the transactions  contemplated
hereby,  do not and will not breach or constitute a default under any applicable
law  or  regulation  or of any  agreement,

<PAGE>

judgment,  order, decree or other instrument binding on the Company which breach
or default could reasonably by expected to have a material adverse effect on the
Company taken as a whole.

                  (c) Except as set forth in Form 10-QSB  filed on November  12,
1999  (the  "SEC  Filing"),  there is no  pending,  or to the  knowledge  of the
Company, threatened,  judicial,  administrative or arbitral action, claim, suit,
proceeding or investigation which might affect the validity or enforceability of
this  Purchase  Agreement  or which  involves the Company and which if adversely
determined,  could  reasonably be expected to have a material  adverse effect on
the Company.

                  (d) No  consent or  approval  of, or  exemption  by, or filing
with,  any party or  governmental  or public  body or  authority  is required in
connection  with the  execution,  delivery and  performance  under this Purchase
Agreement or the taking of any action contemplated hereunder or thereunder.

                  (e)  The  Company  has  been  duly  organized  and is  validly
existing as a corporation in good standing under the laws of the jurisdiction of
its incorporation.

                  (f) The execution,  delivery and performance of this Agreement
by the Company,  and the consummation of the transactions  contemplated  hereby,
will not (i) violate any provision of the Company's articles of incorporation or
bylaws, (ii) violate,  conflict with or result in the breach of any of the terms
of,  result in a material  modification  of the effect of,  otherwise,  give any
other contracting party the right to terminate, or constitute (or with notice or
lapse  of time or both  constitute)  a  default  under,  any  contract  or other
agreement  to which the  Company is a party or by or to which the Company or any
of the Company's assets or properties may be bound or subject, (iii) violate any
order,  judgment,  injunction,  award or  decree  of any  court,  arbitrator  or
governmental  or  regulatory  body  by  which  the  Company,  or the  assets  or
properties

<PAGE>

of the Company are bound, (iv) to the Company's knowledge,  violate any statute,
law or regulation.

         3.       REPRESENTATIONS  AND WARRANTIES OF THE INVESTOR.  The Investor
                  hereby  represents  and warrants to the Company that:

                  (a) The  Investor  has the  corporate  power and  authority to
enter into this Purchase Agreement and to perform its obligations hereunder. The
execution  and  delivery by the  Investor of this  Purchase  Agreement,  and the
consummation by the Investor of the transactions  contemplated hereby, have been
duly authorized by all necessary  corporate  action on the part of the Investor.
This Purchase Agreement has been duly executed and delivered by the Investor and
constitute valid and binding obligations of the Investor, enforceable against it
in  accordance  with  their  respective  terms,  subject  to the  effects of any
applicable bankruptcy,  insolvency,  reorganization,  moratorium or similar laws
affecting  creditors'  rights  generally  and to the  application  of  equitable
principles in any proceeding (legal or equitable).

                  (b) The execution, delivery and performance by the Investor of
this Purchase Agreement,  and the consummation of the transactions  contemplated
hereby,  do not and will not breach or constitute a default under any applicable
law  or  regulation  or of any  agreement,  judgment,  order,  decree  or  other
instrument binding on the Investor.

                  (c) The Investor has prior substantial  investment experience,
including investment in non-listed and non-registered securities and has had the
opportunity  to engage  the  services  of an  investment  advisor,  attorney  or
accountant  to read all of the  documents  furnished

<PAGE>

or made  available  by the  Company  to the  Investor  in  connection  with this
investment and to evaluate the merits and risks of this investment.

         4.  COVENANTS OF THE COMPANY.  The Company  covenants and agrees to use
its best  efforts to register  the Shares and to include the Shares in the first
registration  statement  to be filed  subsequent  to the  effective  date of the
registration  statement  currently  pending  before the  Securities and Exchange
Commission.

         5.       DELIVERY OF SHARES.

                  a.  Promptly  following  the  delivery by the  Investor of the
Purchase  Price for the Common Stock in  accordance  with Section 1 hereof,  the
Company will irrevocably  instruct its transfer agent to issue the Shares to the
Investor with the legended certificates representing the Shares.

                  b. Within three (3) business  days (such third  business  day,
the  "Delivery  Date")  after the business day on which the Company has received
both of the Notice of Sale (by  facsimile  or other  delivery)  and the original
Common Stock  certificate  (and if the same are not  delivered to the Company on
the same date,  the date of delivery of the second of such  items),  the Company
(i) shall  deliver,  and shall  cause legal  counsel  selected by the Company to
deliver,  to its  transfer  agent  (with  copies  to  Investor)  an  appropriate
instruction and opinion of such counsel,  for the delivery of Unlegended  Shares
issuable upon sale of the Shares pursuant to Registration Statement ("Unlegended
Shares"); and (ii) transmit the certificates  representing the Unlegended Shares
(together,  unless otherwise  instructed by the Investor,  with Common Stock not
sold),  to the Investor at the address  specified in a Notice of Sale (which may
be the Investor's  address for

<PAGE>

notices as contemplated by Section 6 hereof or a different  address) via express
courier, by electronic transfer or otherwise.

                  c. In lieu of delivering  physical  certificates  representing
the Unlegended Shares provided the Company's  transfer agent is participating in
the Depository Trust Company ("DTC") Fast Automated Securities Transfer program,
upon request of the Investor and its compliance with the provisions contained in
this paragraph,  so long as the  certificates  therefor do not bear a legend and
the  Investor  thereof  is not  obligated  to return  such  certificate  for the
placement of a legend  thereon,  the Company shall use its best efforts to cause
its transfer agent to electronically transmit the Unlegended Shares by crediting
the account of Investor's  Prime Broker with DTC through its Deposit  Withdrawal
Agent Commission system.

         6. NOTICES.  Any notice required or permitted  hereunder shall be given
in writing (unless otherwise  specified herein) and shall be deemed  effectively
given upon personal  delivery or seven business days after deposit in the United
States  Postal  Service,  by (a) advance copy by fax, and (b) mailing by express
courier or registered or certified mail with postage and fees prepaid, addressed
to each of the other parties thereunto entitled at the following  addresses,  or
at such other  addresses as a party may  designate  by ten days advance  written
notice to each of the other parties hereto.

COMPANY:          XYBERNAUT CORPORATION
                           12701 Fair Lakes Circle
                           Suite 550
                           Fairfax, Virginia 22033
                           ATT: Mr. Steven Newman, Vice Chairman
                           Telephone No.: (703) 631-6925
                           Facsimile No.:  (703) 631-6734

                           with a copy to:
<PAGE>

                           Parker Chapin Flattau & Klimpl, LLP
                           1211 Avenue of the Americas
                           New York, New York 10036
                           ATTN: Martin Eric Weisberg, Esq.
                           Telephone No.: (212) 704-6000
                           Facsimile No.:  (212) 704-6288

PURCHASER:        At the address set forth on the first  page of this Agreement.

                           with a copy to:

                           Krieger & Prager, LLP
                           39 Broadway, Suite 1440
                           New York, New York 10006
                           Telephone No.: (212) 363-2900
                           Facsimile No.:  (212) 363-2999

         7. SEVERABILITY.  If a court of competent jurisdiction  determines that
any provision of this Purchase  Agreement is invalid,  unenforceable  or illegal
for any  reason,  such  determination  shall not affect or impair the  validity,
legality and enforceability of the other provisions of this Purchase  Agreement.
If any such  invalidity,  unenforceability  or illegality of a provision of this
Purchase  Agreement becomes known or apparent to any of the parties hereto,  the
parties  shall  negotiate  promptly  and in good  faith  in an  attempt  to make
appropriate  changes and  adjustments  to such provision  specifically  and this
Purchase Agreement generally to achieve as closely as possible,  consistent with
applicable  law, the intent and spirit of such provision  specifically  and this
Purchase Agreement generally.

         8. EXECUTION IN COUNTERPARTS.  This Purchase  Agreement may be executed
in  counterparts,  each of which shall be deemed an  original,  but all of which
together shall constitute the same Purchase Agreement.

<PAGE>

         9. GOVERNING LAW. This Agreement  shall be governed by and  interpreted
in accordance with the laws of the State of New York.


<PAGE>



         IN WITNESS WHEREOF,  the parties have executed this Purchase  Agreement
as of the date first written above.

                                      XYBERNAUT CORPORATION



                                      By: ______________________________________
                                          Name:
                                          Title:

                                      DALSTON HOLDINGS LIMITED



                                      By: ______________________________________
                                          Name:
                                          Title:




                                                                   EXHIBIT 23.1


                       CONSENT OF INDEPENDENT ACCOUNTANTS

We have issued our report dated February 25, 2000  accompanying the consolidated
financial  statements of Xybernaut  Corporation  appearing in the  Corporation's
Annual  Report on Form  10-KSB for the year ended  December  31,  1999 which are
incorporated by reference in this Registration Statement on Form S-3. We consent
to  the  incorporation  by  reference  in  the  Registration  Statement  of  the
aforementioned  reports  and to the use of our  name  as it  appears  under  the
caption "Experts".


                                                              GRANT THORNTON LLP


Vienna, Virginia
March 31, 2000






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