XYBERNAUT CORP
S-3, 1998-07-16
COMPUTER COMMUNICATIONS EQUIPMENT
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      As filed with the Securities and Exchange Commission on July 16, 1998

                                                   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
                           1211 Avenue of the Americas
                            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          Proposed
Title of each                                Maximum           maximum        Amount of
class of securities       Amount to       Aggregate price      Aggregate     registration
to be registered        be registered        Per share      offering price        fee
- ------------------------------------------------------------------------------------------
<S>                      <C>               <C>                 <C>              <C>    
Common Stock, 
$.01 par value
per share                165,441(1)(3)     $4.734375(2)        $783,260         $231.07
==========================================================================================
</TABLE>

(1)   Represents the  registration for resale of 150% of the number of shares of
      the Company's common stock that would be issuable upon conversion by three
      holders of 375 shares of the Company's Series C Preferred Stock at a price
      of $3.40 per share of common stock.

(2)   Estimated  solely for the  purpose of  calculating  the  registration  fee
      pursuant to Rule 457(c) and (g);  based on the average  ($4.734375) of the
      bid ($4.718750) and asked  ($4.750000) price on the Nasdaq SmallCap Market
      on July 9, 1998.

(3)   The  shares of Common  Stock  offered  hereby  include  the resale of such
      presently  indeterminate  number of  shares  of  Common  Stock as shall be
      issued in respect of all shares of Common Stock  issuable upon  conversion
      of 375 shares of the Company's  Series C Preferred  Stock,  par value $.01
      (the  "Series C Preferred  Stock"),  issued in a private  placement in May
      1998 (the  "Private  Placement").  The  number  of shares of Common  Stock
      indicated to be issuable in connection  with such  transaction and offered
      for resale  hereby is an estimate and is, based on a  Registration  Rights
      Agreement (the "Registration  Rights Agreement") among the Company and the
      Selling Stockholders,  150% of the number of shares that would be issuable
      upon  conversion of 375 shares of the Series C Preferred  Stock at a price
      of $3.40 per share,  and is subject to adjustment  and could be materially
      less than such  estimated  amount  depending  upon  factors that cannot be
      predicted by the Company at this time, including, among others, the future
      market price of the Common Stock. If however, all 375 shares of the Series
      C Preferred Stock currently  outstanding were converted at the closing bid
      price of the  Common  Stock as  reported  by NASDAQ on July 9,  1998,  the
      Company  would be  obligated  to issue a total of 79,470  shares of Common
      Stock.  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 into which the Series C Preferred Stock will be converted.
      See "Risk  Factors  --  Series C  Preferred  Stock"  and  "Description  of
      Securities -- Preferred Stock -- Series C Preferred Stock."


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.


                                       -2-

<PAGE>
- --------------------------------------------------------------------------------
Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.
- --------------------------------------------------------------------------------

                   SUBJECT TO COMPLETION, DATED JULY___, 1998

PROSPECTUS
                         165,441 Shares of Common Stock
                           (par value $.01 per share)

                              XYBERNAUT CORPORATION

            This  Prospectus  pertains to the offer and sale, from time to time,
by or for the account of certain  stockholders  (the "Selling  Stockholders") of
Xybernaut Corporation (the "Company"), of up to 165,441 shares (the "Shares") of
common stock, par value $.01 per share (the "Common Stock"), of the Company. See
"Description of Securities."

            The Shares  offered  hereby may be sold by the Selling  Stockholders
directly or through  agents,  underwriters or dealers as designated from time to
time or through a combination of such methods.  The Company will not receive any
of the  proceeds  from any sale of Shares by or for the  account of the  Selling
Stockholders.  The Selling  Stockholders and any broker-dealers that participate
with the Selling Stockholders in the distribution of the Shares may be deemed to
be  underwriters  and any  commissions  received  or profit  realized by them in
connection  with the  resale of the  Shares  might be deemed to be  underwriting
discounts  and  commissions  under the  Securities  Act of 1933, as amended (the
"Securities  Act"). See "Selling  Stockholders" and "Plan of Distribution."  The
Company has agreed to bear all  expenses  relating to this  registration,  other
than underwriting discounts and commissions. In addition, the Company has agreed
to indemnify the Selling  Stockholders  against certain  liabilities,  including
liabilities  under the Securities Act. See "Selling  Stockholders"  and "Plan of
Distribution."

            The Common Stock is quoted on the NASDAQ  SmallCap  Market under the
symbol  "XYBR".  On July 9, 1998,  the closing bid price of the Common  Stock as
reported by NASDAQ was $4.718750.

            The  Company's  executive  offices  are  located at 12701 Fair Lakes
Circle, Fairfax, Virginia 22033 and its telephone number is (703) 631-6925.

            The shares of Common Stock offered hereby include the resale of such
presently  indeterminate  number of shares of Common Stock as shall be issued in
respect of all shares of Common Stock issuable upon  conversion of 375 shares of
the Company's  Series C Preferred Stock, par value $.01 (the "Series C Preferred
Stock"),  issued in a private  placement in May 1998 (the "Private  Placement").
The number of shares of Common Stock indicated to be issuable in connection with
such transaction and offered for resale hereby is an estimate and is, based on a
Registration  Rights Agreement (the  "Registration  Rights Agreement") among the
Company and the Selling Stockholders, 150% of the number of shares that would be
issuable  upon  conversion  of 375 shares of the Series C  Preferred  Stock at a
price of $3.40 per share,  and is subject to adjustment  and could be materially
less than such estimated  amount depending upon factors that cannot be predicted
by the Company at this time, including, among others, the future market price of
the Common  Stock.  If however,  all 375 shares of the Series C Preferred  Stock
currently  outstanding  were  converted  at the  closing bid price of the Common
Stock as reported by NASDAQ on July 9, 1998,  the Company  would be obligated to
issue a total of  79,470  shares  of  Common  Stock.  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  into  which the  Series C
Preferred  Stock will be  converted.  See "Risk  Factors  -- Series C  Preferred
Stock" and  "Description  of Securities -- Preferred Stock -- Series C Preferred
Stock."

         THE SECURITIES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK AND
              PROSPECTIVE PURCHASERS SHOULD CAREFULLY CONSIDER THE
               FACTORS SPECIFIED UNDER THE CAPTION "RISK FACTORS"
                      LOCATED ON PAGE 4 OF THIS PROSPECTUS.

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

  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
       EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
             COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
                      PROSPECTUS. ANY REPRESENTATION TO THE
                         CONTRARY IS A CRIMINAL OFFENSE.

                   THE DATE OF THIS PROSPECTUS IS ______, 1998


<PAGE>



                              AVAILABLE INFORMATION

           The  Company  is  subject to the  informational  requirements  of the
Securities  Exchange  Act of 1934,  as amended  (the  "Exchange  Act"),  and, in
accordance therewith, files reports, proxy statements and other information with
the Securities and Exchange Commission (the "Commission").  Such reports,  proxy
statements  and other  information  filed by the  Company can be  inspected  and
copied at the public  reference  facilities  maintained by the Commission at 450
Fifth Street,  N.W.,  Washington,  D.C.  20549,  and at the  following  Regional
Offices of the Commission: New York Regional Office, 7 World Trade Center, Suite
1300, New York, New York 10048; and Chicago  Regional  Office,  Citicorp Center,
500 West Madison Street,  Suite 1400,  Chicago,  Illinois 60661.  Copies of such
material may be obtained from the Public Reference  Section of the Commission at
450 Fifth  Street,  N.W.,  Washington,  D.C.  20549,  at prescribed  rates.  The
Commission  also  maintains an Internet site on the World Wide Web that contains
reports,   proxy  and  information   statements  and  other   information  filed
electronically  by  the  Company   (http://www.sec.gov).   Such  reports,  proxy
statements  and other  information  can also be  inspected at the offices of The
Nasdaq Stock Market, 1735 K Street, N.W., Washington, D.C. 20006.

           This Prospectus does not contain all the information set forth in the
Registration  Statement  on Form S-3 (File No. 333-  _____)  (the  "Registration
Statement") of which this Prospectus forms a part,  including  exhibits relating
thereto, which has been filed with the Commission in Washington,  D.C. Copies of
the  Registration  Statement  and the  exhibits  thereto may be  obtained,  upon
payment of the fee  prescribed  by the  Commission,  or may be examined  without
charge, at the offices of the Commission.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

           The  Company's  (i) Annual  Report on Form 10-KSB for the fiscal year
ended December 31, 1997; (ii) the Quarterly Report on Form 10-QSB for the period
ended March 31, 1998; (iii) the Report on Form 8-K dated June 30, 1997; (iv) the
Registration  Statement on Form S-3 (Commission  File No.  333-36077) filed with
the  Commission on September  22, 1997 and Amendment No. 1 to such  Registration
Statement  filed  with  the  Commission  on May 8,  1998;  (v) the  Registration
Statement on Form S-3 (Commission File No.  333-43696) filed with the Commission
on January 2, 1998 and Amendment No. 1 and Amendment No. 2 to such  Registration
Statement  filed  with the  Commission  on  January  22,  1998 and May 8,  1998,
respectively;  (vi) the Registration on Form S-3 (Commission File No. 333-52567)
filed with the Commission on May 13, 1998 and Amendment No. 1 thereto filed with
the  Commission on May 21, 1998;  (vii) the  Registration  Statement on Form S-3
(Commission  File No. 333- ) filed with the  Commission on July ___,  1998;  and
(ix) the  description of the Company's  Common Stock  contained in the Company's
Registration Statement on Form 8-A filed on July 15, 1996 under the Exchange Act
(File No.  0-15086),  each as filed with the Commission  under the Exchange Act,
are incorporated into this Prospectus by reference.

           Each  document  filed  subsequent  to the  date  of  this  Prospectus
pursuant to Section  13(a),  13(c),  14 or 15(d) of the  Exchange Act before the
termination of this offering shall be deemed to be  incorporated by reference in
this  Prospectus  and to be a part  hereof  from the date of the  filing of such
documents.  Any statement  contained in a document  incorporated or deemed to be
incorporated  herein by reference  shall be deemed to be modified or  superseded
for purposes of this Prospectus to the extent that a statement  contained herein
or in any  other  subsequently  filed  document  that also is or is deemed to be
incorporated by reference herein modifies or supersedes such previous statement.
Any statement so modified or superseded  shall not be deemed to be a part hereof
except as so modified or superseded.

THE COMPANY WILL PROVIDE WITHOUT CHARGE TO EACH PERSON, INCLUDING ANY BENEFICIAL
OWNER, TO WHOM A COPY OF THIS PROSPECTUS IS DELIVERED,  UPON THE WRITTEN OR ORAL
REQUEST OF ANY SUCH PERSON, A COPY OF ANY DOCUMENT  INCORPORATED BY REFERENCE IN
THIS  PROSPECTUS  (OTHER THAN  EXHIBITS  UNLESS SUCH  EXHIBITS ARE  SPECIFICALLY
INCORPORATED BY REFERENCE IN SUCH DOCUMENTS). REQUESTS SHOULD BE DIRECTED TO THE
COMPANY,  12701 FAIR LAKES CIRCLE,  FAIRFAX,  VIRGINIA  22033,  (703)  631-6925.
ATTENTION: W. JEFF PAGANO.


                                       -2-

<PAGE>



                               PROSPECTUS SUMMARY

           The following  summary is qualified in its entirety by, and should be
read in conjunction with, the more detailed information and financial statements
and notes  thereto  appearing  elsewhere  or  incorporated  by reference in this
Prospectus.

           To inform  investors of the  Company's  future plans and  objectives,
this Prospectus (and other reports and statements  issued by the Company and its
officers from time to time) contain certain statements  concerning the Company's
future  results,   future  performance,   intentions,   objectives,   plans  and
expectations that are or may be deemed to be  "forward-looking  statements." The
Company's  ability  to do this  has  been  fostered  by the  Private  Securities
Litigation Reform Act of 1995 (the "Reform Act"), which provides a "safe harbor"
for  forward-looking  statements to encourage  companies to provide  prospective
information so long as those statements are accompanied by meaningful cautionary
statements  identifying  important  factors that could cause  actual  results to
differ materially from those discussed in the statement. The Company believes it
is in the best  interest of  investors to take  advantage  of the "safe  harbor"
provisions of the Reform Act. Such  forward-looking  statements are subject to a
number of known and unknown risks and uncertainties that, in addition to general
economic and business  conditions  and those  described in "Risk  Factors" could
cause the Company's  actual  results,  performance  and  achievements  to differ
materially from those described or implied in the forward-looking statements.


                                  THE OFFERING


Securities Registered.....................  165,441 shares of Common Stock
                                           
Common Stock outstanding                   
   prior to the offering hereby...........  20,887,915 shares of Common Stock(1)
                                           
Common Stock outstanding                   
   after the offering hereby..............  21,053,356 shares of Common Stock(1)
                                           
Common Stock trading symbol                 
   on NASDAQ..............................  XYBR

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

(1)   Does not  include  (i)  1,390,430  shares of  Common  Stock  reserved  for
      issuance upon the exercise of outstanding options granted pursuant to Rule
      701 of the Securities Act, the Company's 1996 Omnibus Stock Incentive Plan
      and the 1997 Stock Incentive  Plan; (ii) 5,173,402  shares of Common Stock
      reserved for issuance  upon exercise of  outstanding  warrants to purchase
      Common Stock, which includes 4,583,402 shares of Common Stock reserved for
      issuance upon exercise of outstanding  warrants  issued in connection with
      the  Company's  initial  public  offering  (the "IPO");  and (iii) 420,000
      shares of Common Stock  reserved for issuance  upon  exercise of an option
      granted pursuant to the Company's IPO to purchase 210,000 shares of Common
      Stock and 210,000 redeemable  warrants,  each such warrant to purchase one
      share of Common Stock at an exercise price of $9.075. See "Risk Factors --
      Effect of Possible  Non-Cash  Future Charge" and " -- Securities  Issuable
      Pursuant to Options, Warrants and the Unit Purchase Option."



                                       -3-

<PAGE>



                                  RISK FACTORS

           An investment in the shares of Common Stock offered hereby involves a
high  degree  of risk.  Prospective  investors  should  carefully  consider  the
following risk factors,  in addition to the other  information set forth in this
Prospectus,  in  connection  with an  investment  in the shares of Common  Stock
offered hereby.

HISTORY AND EXPECTATION OF FUTURE LOSSES; NEED FOR ADDITIONAL FINANCING

           The Company was incorporated in October 1990 and commenced operations
in November 1992. In the fiscal years ended March 31, 1994 and 1995, the Company
incurred a net loss of $47,352 and $1,303,892,  respectively. In the years ended
December 31, 1996 and 1997,  the Company  incurred a net loss of $5,238,536  and
$9,479,966,  respectively. The Company incurred a net loss of $1,489,321 for the
quarter  ended March 31, 1998 and  expects to incur a  substantial  loss for the
quarter ended June 20, 1998. The consolidated  balance sheets as of December 31,
1997  and  1996  and  the  related   consolidated   statements  of   operations,
stockholders'  equity, and cash flows for the years then ended,  incorporated by
reference in this Prospectus,  have been incorporated  herein in reliance on the
report dated March 31, 1998, which includes an explanatory paragraph, concerning
the Company's ability to continue as a going concern, of  PricewaterhouseCoopers
LLP, independent accountants,  given on their authority as experts in accounting
and auditing.  The Company intends to conduct significant  additional  research,
development  and testing  that,  together  with  establishment  of marketing and
distribution  capabilities,  are expected to require  substantial funding and to
result in  continuing  operating  losses  until  such time as  sufficient  gross
margins from revenues are generated to cover  operating  costs.  There can be no
assurance that, notwithstanding these efforts and the expenditure of substantial
funds, the Company ever will achieve substantial sales of any of its products or
profitable operations or that it will be able to meet the competitive demands of
the industry in which it  operates.  The success of the Company will be affected
by expenses,  operational  difficulties and other factors frequently encountered
in the development of a business enterprise in a competitive  environment,  many
of which may be beyond the Company's control. See "Risk Factors - Competition."

LIQUIDITY; WORKING CAPITAL NEEDS

           To meet working  capital cash  requirements,  the Company  intends to
obtain a working  capital line of credit and/or complete  additional  financings
including  the exercise of its put option  under the April 1998  Private  Equity
Line of Credit Private Placement (the "Put Option") which  contemplates the sale
of up to  $11,000,000  of the Company's  Common Stock over a period of up to two
years. To date, the Company has sold $1,000,000  worth of shares of Common Stock
and exercised a put option in the aggregate  principal amount of $3,000,000 (the
"Initial Put Option"),  each under the April 1998 Private  Equity Line of Credit
Private  Placement.  However,  there can be no assurance that the Company can or
will obtain  sufficient  funds to meet, in whole or in part, its working capital
needs from  collections  of product  sales.  There can be no assurance  that the
Company  will  be  capable  of  raising  additional  capital  thereafter  or  of
establishing and obtaining funds from a working capital line of credit, that the
exercise of a put option will be  accepted  by the  particular  investor or that
such exercise  will be deemed  advisable at such times as funds may be required,
or that the terms upon which such  capital or line of credit  would be available
to the Company would be acceptable,  in which case the Company could be required
to curtail materially, suspend or cease operations.

DILUTION; IMPACT OF SALE OF COMMON STOCK UPON CONVERSION OF OUTSTANDING
OPTIONS, WARRANTS, THE UNIT PURCHASE OPTION AND CERTAIN REPRICING OPTIONS



                                       -4-

<PAGE>



           The purchasers of the Shares offered hereby will experience immediate
and substantial  dilution in the net tangible value of their Shares in the event
of conversion  of  outstanding  options,  warrants and the issuance of shares of
Common  Stock  pursuant to certain  repricing  arrangements  entered into by the
Company in connection with its exercise of the Initial Put Option. Specifically,
certain options and warrants are convertible into Common Stock at discounts from
future  market  prices of the Common  Stock,  which could result in  substantial
dilution  to existing  holders of Common  Stock.  The sale of such 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.

           At the date of this Prospectus, the Company has reserved an aggregate
of  6,983,832  shares of Common  Stock for  issuance on exercise of  outstanding
options and warrants. The exercise price of the options presently outstanding is
between $1.37 and $6.00 for 1,290,430  shares granted from April 1, 1995 to July
9, 1998.  The exercise price of the 287,860  warrants  outstanding as of July 9,
1998 is between  $1.76 and $18.00 per share.  In  connection  with the Company's
IPO,  warrants to purchase  3,846,429 shares were originally issued that entitle
the holder to purchase a share of common  stock for $9.00  until July 19,  1999.
These warrants contain anti-dilution provisions that have resulted in the number
of shares to be issued upon a complete warrant exercise increasing to 4,583,402.
At the completion of the IPO, the  Representative  received an option (the "Unit
Purchase Option") to purchase 210,000 Units (the "Units"),  each unit consisting
of one share of  Common  Stock  and one  Redeemable  Warrant  (a  "Warrant")  to
purchase  one share of Common  Stock,  at a price of  $9.075  per Unit  during a
period of four years commencing July 18, 1997. The Warrants included in the Unit
Purchase  Option are  exercisable  at $12.60 per share.  During the terms of the
outstanding  options,  warrants and the Unit  Purchase  Option,  the holders are
given the  opportunity  to profit from a rise in the market  price of the Common
Stock,  and their  exercise  may  dilute  the  ownership  interest  of  existing
stockholders,  including  investors  in  this  offering.  The  existence  of the
options,  the warrants and the Unit  Purchase  Option may  adversely  affect the
terms on which the Company may obtain additional equity financing. Moreover, the
holders are likely to exercise  their  rights to acquire  Common Stock at a time
when the  Company  would  otherwise  be able to  obtain  capital  on terms  more
favorable than could be obtained through the exercise of such securities.

           In addition,  the Company agreed to certain repricing arrangements in
connection  with its  exercise  of the  Initial  Put  Option.  Pursuant  to such
arrangement,  one-sixth of the 545,454  shares of Common Stock (the "Initial Put
Shares") issued upon exercise of the Initial Put Option,  are subject to monthly
repricing commencing on September 30, 1998. Under the repricing calculation,  if
the closing price of the Common Stock on the trading date immediately  preceding
the  repricing  date is less than  $7.20 per share,  the shares of Common  Stock
subject to  repricing  shall be repriced at the lowest  closing bid price of the
Common Stock for the 30 days  preceding  such  repricing  date (the "Initial Put
Reset  Price").  The Company shall issue to the investors  such number of shares
(the "Initial Put Repricing  Shares")  equal to the  difference  between (a) the
quotient of 500,000 and the Initial Put Reset Price and (b) the number of shares
subject to repricing.  No  additional  shares of Common Stock shall be issued if
the Initial Put Reset Price is equal to or greater than $5.50.

UNCERTAINTY OF MARKET DEVELOPMENT AND PRODUCT ACCEPTANCE

           The mobile computing  market is emerging and relatively  undeveloped.
The Company  sold its first Mobile  Assistant(R)  in 1993 and as of December 31,
1997 had sold and delivered  approximately  $1.8 million of Mobile  Assistant(R)
systems.  The Company  commenced  delivery of the  Pentium(R)  Mobile  Assistant
P-133(TM) in August 1997 and has announced that it expects to commence  delivery
of Mobile  Assistant(R)  IV, a Pentium 266 MHZ based  system  ("MA IV"),  in the
quarter  ending  December 31, 1998.  In September  1997,  the Company  announced
linkAssist(TM), a software development toolkit, which provides speech linking of
data in almost any format, without


                                       -5-

<PAGE>



altering  the  original  data  and  webAssist(TM)  software  that  allows  voice
navigation  of HTML links found on the  Internet and  intranet.  The size of the
mobile computing  market is currently  limited by the high unit prices of mobile
computers as compared to laptops and other portable  computers,  the specialized
nature of each  application  and the need for  custom  applications  and  system
integration and the limited supply to date of components for completed  systems.
The  potential  size  of the  market  will  be  limited  by the  rate  at  which
prospective  customers  recognize and accept the functions and  capabilities  of
integrated  mobile  computing  systems.   There  can  be  no  assurance  that  a
significant  market will  develop for mobile  computing  systems or, if a market
develops,  that the Mobile  Assistant(R)  series and any of the Company's  other
products  will  become a  significant  factor in any market  that  develops.  In
addition, there is no assurance that the Company will obtain the working capital
needed to meet the competitive demands of the industry in which it operates. See
"Risk Factors - Liquidity; Working Capital Needs; -- Competition."

           The   commercial   success   of  the  Mobile   Assistant(R)   series,
linkAssist(TM),  webAssist(TM)  and software  toolkits  enabling  the  Company's
customers  to  more  rapidly  create  customized  software   applications  on  a
stand-alone basis or for use with the Mobile Assistant(R)  series, and any other
product  that the  Company  may  develop  will  depend  upon  acceptance  by the
commercial, healthcare, education and military markets, of which there can be no
assurance.

           The   Company   believes   that  any  product   acceptance   will  be
substantially dependent upon educating the commercial, healthcare, education and
military markets as to the capabilities,  characteristics, benefits and efficacy
of the Mobile  Assistant(R)  series and the Company's other  products,  of which
there can be no assurance.

COMPETITION

           The computer  industry is intensely  competitive and is characterized
by rapid technological  advances,  evolving industry standards and technological
obsolescence.  Many of the Company's  current  competitors have longer operating
histories and greater financial, technical, sales, marketing and other resources
than the Company.  Several other  companies are engaged in the  manufacture  and
development of body-mounted or hand-held computing systems that compete with the
Mobile  Assistant(R)  series,  including  Computing  Devices  International,   a
division of Ceridian Corporation,  ViA Inc., Texas Microsystems,  Telxon, Norand
and Teltronics,  Inc., a subsidiary of Interactive Solutions, Inc., Raytheon and
a  consortium  of Litton and TRW.  Personal  digital  assistants  and laptop and
notebook  computers  also are  products  that could  compete  against the Mobile
Assistant(R) in applications where hands-free,  voice-activated operation is not
required. Many of these computers are manufactured by major domestic and foreign
computer manufacturers which possess far more resources than the Company and can
be expected to compete  vigorously  with the Company for the market at which the
Mobile Assistant(R) is directed. In addition, new and competing technologies are
being  developed  in  hands-free  mobile  computing  systems.  There  can  be no
assurance  that the  Company  will be able to compete  successfully  against its
competitors,  that it will have the working  capital needed to  incorporate  the
constant  technological  advances  in  its  products  or  that  the  competitive
pressures  faced  by  the  Company  will  not  adversely  affect  its  financial
performance.

DEPENDENCE UPON SUPPLIERS

           To prepare the Mobile  Assistant(R)  P-133 for delivery to customers,
the Company purchases system components from several suppliers, who manufacture,
assemble,  integrate and test these components.  The Company then combines those
components and performs system tests prior to shipping.  Certain  components are
currently  purchased from single  suppliers.  The Company expects that the MA IV
will be assembled,


                                       -6-

<PAGE>



integrated  and tested by third  party.  The Company has  entered  into  written
agreements with its suppliers for batteries, head-mounted displays and computing
units.  Although the Company  believes there are multiple sources for many parts
and components,  the Company currently depends heavily on its current suppliers.
Although  management  believes  that  the  Company  could  adapt  to any  supply
interruptions,  such occurrences could necessitate  changes in product design or
assembly  methods  for the Mobile  Assistant(R)  series and cause the Company to
experience  temporary  delays or  interruptions in supply while such changes are
incorporated.  Further,  because the order time for certain components may range
up to approximately  three months,  the Company also could experience  delays or
interruptions  in  supply in the event the  Company  is  required  to find a new
supplier for any of these  components.  Any  disruptions  in supply of necessary
parts and  components  from the Company's  key  suppliers  could have a material
adverse effect on the Company's  results of operations.  Any future  shortage or
limited  allocation  of  components  for the  Mobile  Assistant(R)  could have a
material adverse effect on the Company.

SUBSTANTIAL DEPENDENCE UPON SINGLE PRODUCT LINE;
POSSIBILITY OF UNSUCCESSFUL NEW PRODUCT DEVELOPMENT

           The Mobile  Assistant(R) series currently consists of the P-133 model
based on a 133 MHZ Intel  Pentium(R)  processor and the MA IV, which is expected
to be available in late 1998. The Mobile  Assistant(R)  series are the Company's
principal products,  and its success will depend upon its commercial acceptance,
which  cannot be assured.  For single unit  purchases,  the Mobile  Assistant(R)
P-133  currently  is priced  from  $7,196 to $8,995 and up,  depending  upon the
discount and selected features. As technological  developments cause declines in
hardware costs, the Company expects that mobile computer sales will be driven by
system  capabilities  and  integration.  There is no  assurance  that the Mobile
Assistant(R) will offer the performance  capabilities or features that customers
will value and, if not,  the  Company  could be required to modify the design of
the Mobile  Assistant(R) which may require the expenditure of additional capital
currently  unavailable to the Company.  While  linkAssist(TM)  and the Company's
planned software toolkits are intended for use both with the Mobile Assistant(R)
series and  independently,  there can be no assurance that a separate market for
the Company's existing and planned software products will develop.  There can be
no assurance that any products,  if sold, will generate  significant revenues or
any profits.  The Company is also developing  additional products for the Mobile
Assistant(R)  series for  introduction  in the future and  intends to modify the
Mobile  Assistant(R)  series for use in other  applications and to develop other
products using its core technologies. Additional product development will result
in the Company incurring  significant research and development expenses that may
be unrecoverable  should  commercialization  of new products prove unsuccessful.
The Company also could require  additional  funding if research and  development
expenses  are  greater  than  anticipated.  There can be no  assurance  that the
Company  will be  successful  in its future  product  development  efforts or in
diversifying  its product line. See "Risk Factors - Liquidity;  Working  Capital
Needs."

UNCERTAIN PROTECTION OF PATENT AND PROPRIETARY RIGHTS;
NO ASSURANCE OF ENFORCEABILITY OR SIGNIFICANT COMPETITIVE ADVANTAGE

           The  Company   considers  its  patent,   trade  secrets,   and  other
intellectual  property  and  proprietary  information  to be  important  to  its
business prospects. The Company relies on a combination of patent, trade secret,
copyright  and  trademark  laws and  contractual  restrictions  to establish and
protect its proprietary rights. The Company has entered into confidentiality and
invention   assignment   agreements   with  its   employees,   and  enters  into
non-disclosure  agreements  with  its  suppliers,  VARs,  OEMs  and  actual  and
potential  customers  to  limit  access  to and  disclosure  of its  proprietary
information. The Company has registered its Mobile Assistant(R) and


                                       -7-

<PAGE>



Xybernaut(R)  trademarks on the  Principal  Register of the United States Patent
and Trademark Office ("Patent Office").

           In  April  1994,   U.S.   patent   number   5,305,244   ("hands-free,
user-supported  portable  computers") (the "Patent") for the Mobile Assistant(R)
Series was granted to the Company.  This patent was  previously  assigned to the
Company by several  employees of the Company.  In  September  1995,  the Company
received  a  notification  from the Patent  Office  entitled  "office  action in
reexamination,"  which  indicated  that  certain  claims  under the Patent  were
subject to reexamination and were preliminarily  rejected.  The reexamination of
the  Patent was  initiated  as a result of a request  from one of the  Company's
competitors.  In May 1996, the Company was successful in the  reexamination  and
the Patent Office issued a Notice of Intent to Issue  Reexamination  Certificate
and  Reexamination  Reasons for  Patentability/Confirmation  with respect to the
issues raised by the request for  reexamination,  wherein it concluded  that the
Company's claims are patentable with respect to the issues raised by the request
for  reexamination.  In April 1996,  the Company  received  notification  that a
second  reexamination  request had been filed with the Patent Office by the same
competitor that had initiated the prior reexamination, and in September 1996 the
Company  received a notification  from the Patent Office entitled "office action
in  reexamination,"  which  indicates  that certain claims under the patent were
subject to reexamination and were preliminarily  rejected. In November 1996, the
Company  filed  a  written  response  to  the  request  for   reexamination  and
preliminary  rejection.  The second  re-examination  has been  concluded and the
Patent Office indicated that the Company was successful in the reexamination and
sent the  Company  a  "Notice  of  Intent  to Issue  Reexamination  Certificate"
indicating that the Patent Office ruled in the Company's favor.  Subsequently on
September 23, 1997,  the Patent Office issued the  Reexamination  Certificate to
the  Company  indicating  successful  results  for  the  Company  in the  second
re-examination.  Most of the  Company's  revenue  for the  twelve  months  ended
December 31, 1997 and 1996 were derived from products  included within the scope
of the patent.  The  Company  has  notified  several of its  competitors  of the
existence  of the Patent,  which the  Company's  counsel  believes may have been
infringed by some of such  competitors.  The Company intends to take any and all
appropriate measures,  including legal action, necessary to maintain and enforce
its rights  under the Patent and to recover any damages  suffered as a result of
any alleged infringement.

           Since July 1996,  the Company has filed fifteen  patent  applications
covering  various  aspects of  computers  in general and  wearable  computers in
particular.  Of these fifteen  applications,  five additional  patents have been
issued,  one patent has been  allowed  pending  issuance  and nine  patents  are
pending.  Most of these applications have also been filed in European countries,
The  People's  Republic of China,  Japan,  Republic of Korea,  Republic of China
(Taiwan),  Canada and Australia. All patents obtained by Company employees under
pending  and future  applications  have been and will be assigned to the Company
under existing invention assignments.

           Notwithstanding  the  foregoing,  there can be no assurance  that the
Company's  pending patent  applications  will issue as patents,  that any issued
patent will provide the Company with significant  competitive advantages or that
challenges will not be instituted  against the validity or enforceability of any
patent held by the Company.  The cost of  litigation  to uphold the validity and
prevent  infringement  of  patents  can be  substantial.  There  also  can be no
assurance that others will not  independently  develop  similar or more advanced
products,  design patentable alternatives to the Company's products or duplicate
the Company's trade secrets. The Company may in some cases be required to obtain
licenses  from  third-parties  or to redesign its products or processes to avoid
infringement.   The  Company  also  relies  on  trade  secrets  and  proprietary
technology  and enters into  confidentiality  agreements  with its employees and
consultants.  There can be no  assurance  that the  obligation  to maintain  the
confidentiality  of such trade secrets or  proprietary  information  will not be
breached by employees or  consultants  or that the  Company's  trade  secrets or
proprietary  technology  will not  otherwise  become  known or be  independently
developed  by  competitors  in such a manner that the  Company has no  practical
recourse.


                                       -8-

<PAGE>



LIMITED MARKETING AND DIRECT SALES EXPERIENCE;
DEPENDENCE ON OTHERS FOR MARKETING AND SALES.

           The Company intends to continue  development of a sales  organization
to market  and sell its  mobile  computing  products  to  value-added  resellers
("VARs"), original equipment manufacturers ("OEMs"), distributors and end users.
The  Company is also  developing  a network of VARs,  distributors  and OEMs and
intends  to enter into  joint  ventures  and  licensing  or other  collaborative
arrangements to market and sell its mobile computing products. Such arrangements
may result in a loss of control by the Company  over the  marketing  and sale of
its products.  There can be no assurance  that the Company will be successful in
entering into such additional  arrangements or be able effectively to manage and
maintain its relationships  with others, or that any marketing and sales efforts
undertaken  for the  Company by others  will be  successful.  The  Company  also
markets  its  products  outside  of the  United  States.  A number  of risks are
inherent in international  transactions,  such as the imposition of governmental
controls  including  restrictions on the exporting of currency,  fluctuations in
foreign  currency  exchange rates,  export license  requirements,  political and
economic  instability,  trade restrictions,  changes in tariffs and difficulties
and  expenses  in managing  international  operations.  These and other  factors
beyond the  Company's  control may  adversely  affect the  Company's  ability to
achieve significant sales.

DEPENDENCE UPON AND NEED FOR KEY PERSONNEL; LIMITED MANAGEMENT TEAM

           The Company's  success  depends to a significant  extent on Edward G.
Newman,  its  President,  Chief  Executive  Officer and Chairman of its Board of
Directors.  The loss of Mr. Newman would have a material  adverse  effect on the
Company's  progress and ultimate  likelihood of success.  Because the Company is
substantially  dependent on Mr.  Newman's  services and there are currently only
two other board-elected  officers of the Company,  the Company may be considered
to have limited  management.  Although the Company has entered into a three-year
employment  agreement with Mr. Newman, this agreement may not assure the Company
the continued services of Mr. Newman. The Company has obtained a key-person life
insurance  policy on the life of Mr.  Newman in the  amount of  $2,000,000.  The
Company's success also will depend upon its ability to attract and retain highly
qualified and experienced management and technical personnel.  The Company faces
competition for such personnel from numerous other entities,  many of which have
significantly greater resources than the Company. There can be no assurance that
the  Company  will be  successful  in  recruiting  such  personnel  or that,  if
recruited,  such persons would succeed in establishing profitable operations for
the Company.



                                       -9-

<PAGE>



CUSTOMER CONCENTRATION

           For the twelve  month period  ended  December  31,  1996,  two of the
Company's  customers accounted for 64% and 24%,  respectively,  of the Company's
revenues.  For the fiscal year ended December 31, 1997, two customers  accounted
for 34% and  10%,  respectively  of the  Company's  revenues.  Accordingly,  the
Company is significantly  dependent on revenues derived from a limited number of
customers.  The loss of one or more  significant  customers  may have a material
adverse  effect on the ability of the Company to achieve  profitability.  To the
extent the Company's  dependence  increases on large corporate  customers in the
future,  the Company will be subject to an  increased  risk that the loss of any
such customers will have a material  adverse effect on the Company's  results of
operations.  The Company may remain  dependent  in the  immediate  future upon a
limited number of customers (the identity of which may be subject to change) for
a material percentage of its annual operating revenue.

RAPID TECHNOLOGICAL CHANGE AND RISK OF OBSOLESCENCE

           The  market  for  computer   products  is   characterized   by  rapid
technological  advances,  evolving  industry  standards,  changes  in  end  user
requirements  and  frequent  new product  introductions  and  enhancements.  The
introduction  of products  embodying new  technologies  and the emergence of new
industry  standards  could render the Company's  existing  products and products
currently under  development  obsolete and  unmarketable.  The Company's success
will depend upon its  ability to enhance  its current  products  and develop and
successfully  introduce and sell new products that keep pace with  technological
developments and respond to evolving end user  requirements.  Any failure by the
Company to anticipate or respond adequately to technological developments or end
user  requirements,   or  any  significant  delays  in  product  development  or
introduction, could damage the Company's competitive position in the marketplace
and reduce  revenues.  The  Company  expects to increase  the use of  additional
external and internal resources in the near term to meet these challenges. There
can be no assurance that the Company will be successful in hiring,  training and
retaining qualified product  development  personnel to meet its needs. There can
be no assurance  that the Company will be successful in developing and marketing
new  products  or  product  enhancements  on a  timely  basis.  Any  failure  to
successfully develop and market new products and product enhancements would have
a material adverse effect on the Company's results of operations.

YEAR 2000 ISSUES

            The Company is aware of the  computing  issues  associated  with the
coming of the millennium (year 2000), most notably whether computer systems will
properly  recognize  date sensitive  information  when the year changes to 2000.
Systems that do not properly recognize such information could generate erroneous
data or cause a system  to fail.  Based on  preliminary  investigations  and the
representations of several of its suppliers, the Company currently believes that
computers and software used in its  operations  and sold by the Company are year
2000  compliant.  The Company is working  with its  suppliers  and  customers to
either verify year 2000 compliance or identify and execute  appropriate  changes
to make such systems year 2000 compliant.  The Company believes that the cost of
completing  any  modifications  for year 2000  compliance to the systems used or
sold by the Company  will not be  material.  However,  there can be no assurance
that the  Company's  suppliers  will be correct in their  assertions  that their
products are year 2000  compliant or that the Company's  estimate of the cost of
systems  modifications  for year 2000  compliance  will prove  ultimately  to be
correct.



                                      -10-

<PAGE>



INDUSTRY CYCLICALITY

           The  computer  industry  historically  has been  affected by periodic
downturns,  which  have had an  adverse  economic  effect  on  manufacturers  of
computer  hardware  and  software  as well as upon end  users of  computers.  In
addition, the life cycle of existing computer products and timing of new product
development  and  introduction  can affect  demand for  computer  products.  The
Company's  results of  operations  for any  particular  period may be  adversely
affected by numerous  factors,  such as the loss of key  suppliers or customers,
price competition,  problems encountered in managing inventories or receivables,
the timing or  cancellation  of purchase orders with suppliers and the timing of
expenditures in anticipation  of increased sales and customer  product  delivery
requirements,  if any. Price  competition in the computer  industry in which the
Company  competes is intense and could  result in gross  margin  declines  which
could have an adverse impact on the Company's financial performance.

EFFECT OF POSSIBLE NON-CASH FUTURE CHARGE

           As a condition to the Company's  initial public offering (the "IPO"),
certain of the Company's  stockholders,  primarily officers and directors,  have
been  required to deposit an aggregate of 1,800,000  shares of Common Stock into
an escrow account (the "Escrowed  Shares").  The Escrowed  Shares are subject to
incremental  release  over a three-year  period only in the event the  Company's
gross  revenues and earnings  (loss) per share for the 12-month  periods  ending
September  30, 1997,  1998 and 1999 equal or exceed  certain  gross  revenue and
earnings (loss) per share targets.  If such per share targets are not met in any
of the  relevant  12-month  periods  (and the price of the Common Stock does not
meet or exceed the price described below),  the Escrowed Shares will be returned
to the Company in amounts which have been agreed upon between the Representative
and the Company for each period and canceled. In addition to the foregoing,  all
the then  Escrowed  Shares will be released to the  stockholders  if the closing
price of the Common Stock as reported on The Nasdaq  SmallCap  Market  following
this offering equals or exceeds $11.00 for 25 consecutive trading days or 30 out
of 35 consecutive  trading days during the period ending  September 30, 1999. In
the event any Escrowed  Shares held by officers,  employees and  consultants are
released, the difference between the initial offering price and the market value
of  such  shares  at the  time  of  release  will  be  deemed  to be  additional
compensation expense to the Company. Assuming the price of Common Stock is equal
to or greater than the initial offering price of the shares at the Company's IPO
(of which there can be no assurance),  the release of the Escrowed  Shares would
result  in an  earnings  charge  that  would  have the  effect  of  reducing  or
eliminating  any  earnings  per share and could  have a  negative  effect on the
market price for the Common  Stock.  The  earnings per share target  calculation
will be based on the average number of shares issued and outstanding during each
period but excludes  shares issued  pursuant to a unit purchase  option  granted
pursuant to the IPO,  extraordinary items or compensation expense charged to the
Company  related to the release of the Escrowed  Shares.  The stock and earnings
targets for escrow  release for September 30, 1997 were not achieved and 300,000
shares were canceled from the escrow pool, which resulted in a reduction of 2.1%
of the Company's outstanding shares of Common Stock. Given the expected start of
full-scale  production of the MA IV in the quarter ending December 31, 1998, the
Company's  management  believes  that it is  likely  that  the  Company's  gross
revenues  and  allowable  losses will not meet the  Performance  Targets for the
12-month  period  ending  September  30, 1998.  Accordingly,  the release of the
escrow  shares  for this  period is only  likely if the  stock  price  equals or
exceeds  $11.00  for 25  consecutive  trading  days or 30 out of 35  consecutive
trading days prior to September 30, 1998. If conditions  are not met for release
from  escrow,  then  750,000  shares of stock will be returned to the Company on
September  30,  1998  and  canceled,  resulting  in  no  earnings  impact  and a
commensurately lower number of outstanding shares.



                                      -11-

<PAGE>



CONTROL BY EXISTING STOCKHOLDERS

           Following this offering, the Company's executive officers,  directors
and  principal   stockholders   will,  in  the   aggregate,   beneficially   own
approximately  29.3% of the Company's  outstanding shares of Common Stock. These
stockholders,  if acting  together,  will be able to  effectively  control  most
matters  requiring  approval by the  stockholders of the Company,  including the
election of  directors.  The voting power of these  stockholders  under  certain
circumstances  could  have the  effect of  delaying  or  preventing  a change in
control of the Company.

LIMITATION OF LIABILITY

           The Company's Certificate of Incorporation provides that directors of
the Company shall not be personally  liable for monetary  damages to the Company
or its  stockholders  for a breach of fiduciary  duty as a director,  subject to
limited  exceptions.  Although such  limitation of liability does not affect the
availability  of equitable  remedies  such as injunctive  relief or  rescission,
these provisions of the Certificate of Incorporation  could prevent the recovery
of monetary damages against directors of the Company.  See  "Indemnification for
Securities Act Liabilities."

SHARES ELIGIBLE FOR FUTURE SALE

           Sales of a substantial number of shares of the Company's Common Stock
in the public market  following this offering could adversely  affect the market
price of the Common Stock. Of the 22,009,108 shares of Common Stock that will be
outstanding  or  registered  for sale  upon  the  completion  of this  offering,
11,484,031 will be freely tradeable without restriction or further  registration
under the Securities Act. Such number includes  3,846,429 shares of Common Stock
distributed in the IPO,  1,958,984  shares of Common Stock registered and issued
upon  conversion  of the Series A Preferred  Stock,  3,172,239  shares of Common
Stock  registered  and issued upon  conversion of the Series B Preferred  Stock,
2,340,938  shares of Common Stock  registered in connection  with the April 1998
Private  Equity Line of Credit  Private  Placement,  and the 165,441  additional
shares of Common Stock  registered in this  offering.  The remaining  10,525,077
shares of the Common Stock are  "restricted  securities" as that term is defined
in Rule 144 promulgated  under the Securities Act, and in the future may only be
sold pursuant to an effective  registration  statement under the Securities Act,
in compliance  with the exemption  provisions of Rule 144 or pursuant to another
exemption  under the  Securities  Act.  In the absence of any  agreement  to the
contrary,  the outstanding  restricted  Common Stock could be sold in accordance
with one or more other exemptions under the Securities Act (including Rule 144).
Rule 144, as  amended,  permits  sales of  restricted  securities  by any person
(whether or not an  affiliate)  after one year,  at which time sales can be made
subject  to  the  Rule's   existing   volume  and  other   limitations   and  by
non-affiliates   without  adhering  to  Rule  144's  existing  volume  or  other
limitations  after two years.  Future sales of substantial  amounts of shares in
the  public  market,  or the  perception  that such  sales  could  occur,  could
adversely  affect the price of the shares in any market that may develop for the
trading of such shares. In addition, pursuant to the terms of agreements entered
into  pursuant to the IPO, the holders of  9,905,437  shares of Common Stock may
not sell or dispose of their  shares of Common Stock until July 18, 1998 without
prior written consent of the  representative  of the underwriter in the IPO (the
"Representative").

NO DIVIDENDS ANTICIPATED

           The Company has never paid any dividends on its  securities  and does
not anticipate the payment of dividends in the foreseeable future.


                                      -12-

<PAGE>



VOLATILITY OF STOCK PRICE

           The trading price of the Common Stock has been  volatile,  and it may
continue to be so. Such trading price could be subject to wide  fluctuations  in
response to announcements of business and technical  developments by the Company
or its competitors,  quarterly variations in operating results, and other events
or factors,  including expectations by investors and securities analysts and the
Company's prospects.  In addition,  stock markets have experienced extreme price
volatility in recent years. This volatility has had a substantial  effect on the
market prices of development stage companies,  at times for reasons unrelated to
their operating performance. Such broad market fluctuations may adversely affect
the price of the Common Stock.

ANTI-TAKEOVER CONSIDERATION; RIGHTS OF PREFERRED STOCK

           The Company's Certificate of Incorporation authorizes the issuance of
up to  6,000,000  shares  of $.01 par  value  preferred  stock  (the  "Preferred
Stock").  As of the date of this  Prospectus,  only the Series C Preferred Stock
are issued and outstanding.  The authorized and unissued  Preferred Stock may be
issued  with  voting,  conversion  or other  terms  determined  by the  Board of
Directors  which  could be used to  delay,  discourage  or  prevent  a change of
control of the Company. Such terms could include,  among other things,  dividend
payment  requirements,  redemption  provisions,  preferences as to dividends and
distributions  and preferential  voting rights.  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  management  of the  Company.  The  Company  has no  present
intention  to  issue  any  additional   Preferred  Stock.  See  "Description  of
Securities -- Preferred Stock."

           In addition,  the Board of Directors of the Company  recently adopted
resolutions which implemented a classified or staggered Board of Directors which
would  limit an  outsider's  ability to effect a rapid  change of control of the
Board.

           The  ability  of the  Board  of  Directors  to  issue  "blank  check"
Preferred  Stock and the staggered  Board of Directors  could have the effect of
delaying, deterring or preventing a change in control of the Company without any
further action by the  shareholders.  In addition,  issuance of Preferred Stock,
without  shareholder  approval,  on such  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."


                                 USE OF PROCEEDS

           The Shares being offered hereby are being  registered for the account
of the Selling Stockholders,  and, accordingly, the Company will not receive any
of the proceeds from the sale of the Shares.






                                      -13-

<PAGE>



                              SELLING STOCKHOLDERS

           The Shares being offered for resale by the Selling  Stockholders were
acquired in connection with the May 1998 Private Placement.  The following table
sets forth certain information regarding the ownership of shares of Common Stock
by the Selling  Stockholders  as of July 9, 1998, and as adjusted to reflect the
sale  of the  Shares.  The  information  in the  table  concerning  the  Selling
Stockholders  who may  offer  Shares  hereunder  from  time to time is  based on
information provided to the Company by such stockholder.  Information concerning
the Selling  Stockholders  may change from time to time and any changes of which
the  Company  is advised  will be set forth in a  Prospectus  Supplement  to the
extent required. See "Plan of Distribution."

                                                                 Shares of
                                                             Common Stock Owned
                                                             after Offering (2)
                                                            -------------------
                            Shares of
                          Common Stock      Shares of
                         Owned Prior to   Common Stock
                          Offering (1)     to be Sold        Number     Percent
                         --------------   ------------      --------    -------

CPR (USA) Inc.              120,882         120,882         120,882       0.57%
Libertyview Plus Fund        34,853          34,853          34,853       0.17%
Libertyview Fund, LLC         9,706           9,706           9,706       0.05%
                            -------         -------         -------     ------
   Total                    165,441         165,441         165,441       0.79%
                            =======         =======         =======     ======
                                                                 
- -----------------

(1)   Assumes that each Selling  Stockholder  will  exercise all of its Series C
      Preferred Stock into Common Stock. See "Description of Securities."

(2)   Each Selling  Stockholder  has agreed that it will not be,  following  any
      conversion of the Series C Preferred Stock the Put Shares,  the beneficial
      owner of 4.99% or more of the then issued and outstanding shares of Common
      Stock.

           The Selling  Shareholders are not affiliated with the Company.  Other
than being the sole investors in a June 1997 private  placement of the Company's
Series A Preferred  Stock,  the Selling  Stockholders  have not had any material
relationship with the Company within the past three years.

                                      -14-

<PAGE>



                            DESCRIPTION OF SECURITIES

GENERAL

           The  authorized  capital stock of the Company  consists of 40,000,000
shares of Common  Stock,  par value  $.01 per  share,  and  6,000,000  shares of
Preferred  Stock,  par value $.01 per share.  As of the date  hereof,  there are
20,887,915  shares of Common  Stock and 375 shares of Series C  Preferred  Stock
issued and outstanding.  The Company currently has reserved  6,546,692 shares of
Common Stock for issuance pursuant to outstanding options and warrants.

THE PRIVATE PLACEMENT

           On May 22,  1998 (the  "Closing  Date"),  the Company  consummated  a
private  placement  of  110,294  shares of Common  Stock at a price of $3.40 per
share and 375 shares of Series C Preferred  Stock at a price of $1,000 per share
for an aggregate purchase price of $750,000.  The shares of Common Stock and the
shares of Series C Preferred  Stock were issued by the Company in reliance  upon
the provisions of Section 4(2) and Regulation D of the Securities Act.

COMMON STOCK

           The  holders of the Common  Stock are  entitled  to one vote for each
share held of record on all matters  submitted  to a vote of  stockholders.  The
Company's 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.  Holders of Common Stock are
entitled to receive  ratably  such  dividends as may be declared by the Board of
Directors  out  of  funds  legally  available  therefor.   In  the  event  of  a
liquidation,  dissolution or winding up of the Company,  holders of Common Stock
are  entitled  to  share  ratably  in the  assets  remaining  after  payment  of
liabilities.  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

           The Board of Directors has the authority, without further stockholder
approval,  to issue up to 6,000,000  shares of Preferred Stock from time to time
in one or more series,  to establish the number of shares to be included in each
such series, and to fix the designations,  powers, preferences and rights of the
shares of each such series and the  qualifications,  limitations or restrictions
thereof.  The  issuance  of  Preferred  Stock may have the effect of delaying or
preventing a change in control of the Company.  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,  such  issuances  could have the effect of decreasing  the market
price of the Common Stock.

           SERIES C PREFERRED STOCK

           On May 15, 1998, the Board of Directors  authorized the issuance of a
series of  Preferred  Stock  consisting  of 375 shares (the  "Series C Preferred
Stock"),  each such  share of  Series C  Preferred  Stock has a stated  value of
$1,000 (the "Liquidation Preference"),  pursuant to a Certificate of Designation
(the "Certificate of Designation").


                                      -15-

<PAGE>



           Dividends.  The holders of the shares of Series C Preferred Stock are
entitled to  receive,  when and as  declared  by the Board of  Directors  of the
Company,  dividends  at the  rate  of five  percent  of the  stated  Liquidation
Preference per share per annum, and no more,  payable,  at the discretion of the
Board of Directors,  in Common Stock or cash.  Dividends accrue on each share of
Series C Preferred Stock from the date of initial  issuance.  Such dividends are
in preference to any distributions on any outstanding  shares of Common Stock or
any other  equity  securities  of the Company  that are junior to the  Preferred
Stock as to the payment of dividends.

           Preferences  on  Liquidation.  In  the  event  of  any  voluntary  or
involuntary  liquidation,  dissolution or winding up of the Company, the holders
of shares of the Series C Preferred Stock then outstanding  shall be entitled to
be paid,  out of the assets of the Company  available  for  distribution  to its
stockholders,  an amount equal to the  Liquidation  Preference for each share of
Series C  Preferred  Stock  owned by such  holder,  plus all  accrued and unpaid
dividends thereon to the date of payment. If upon liquidation,  dissolution,  or
winding up of the Company,  the assets of the Company available for distribution
to its  stockholders  shall be  insufficient  to pay the holders of the Series C
Preferred  Stock  the  full  Liquidation  Preference  plus  accrued  and  unpaid
dividends  to which they  respectively  shall be  entitled,  the  holders of the
Series C  Preferred  Stock  together  with the  holders  of any other  series of
Preferred  Stock ranking on a parity with the Series C Preferred Stock as to the
payments  of amounts  upon  liquidation,  dissolution  or winding up shall share
ratably in any distribution of assets according to the respective  amounts which
would  be  payable  in  respect  of all  such  shares  held  by  the  respective
stockholders.  The  sale or  other  disposition  (for  cash,  shares  of  stock,
securities or other consideration), of all or substantially all of the assets of
the Company shall be deemed to be a  liquidation,  dissolution  or winding up of
the Company but the merger or  consolidation of the Company into or with another
corporation  or  into  or  with  the  Company,  shall  not  be  deemed  to  be a
liquidation,  winding up or dissolution of the Company.  The holders of Series C
Preferred   Stock  shall  have  no  priority  or  preference   with  respect  to
distributions made by the Company in connection with the repurchase of shares of
Common  Stock issued to or held by  employees,  directors  or  consultants  upon
termination of their employment or services pursuant to agreements providing for
the right of said repurchase between the Company and such persons.

           Conversion Rights. The holders of Series C Preferred Stock shall have
conversion  rights as follows:  (i) no shares of Series C Preferred Stock may be
converted  prior to August  15,  1998;  (ii) at any time after  August 15,  1998
through  November 14, 1998,  up to  twenty-five  (25%)  percent of the shares of
Series C Preferred Stock then outstanding may be converted, at the option of the
holders thereof;  and (iii) thereafter,  on November 15, 1998, February 15, 1999
and May 15,  1999,  an  additional  twenty-five  (25%)  percent of the shares of
Series C Preferred Stock then outstanding may be converted,  on a cumulative and
pro rata basis,  at the option of the holders  thereof.  The number of shares of
fully-paid  and  nonassessable  Common  Stock  into which each share of Series C
Preferred Stock may be converted shall be determined by dividing the Liquidation
Preference by an amount (the "Conversion Price") equal to the lesser of (A) 100%
of the average  closing bid price of the Common  Stock as reported on the Nasdaq
SmallCap  Market or any  successor  exchange in which the Common Stock is listed
for the five trading days preceding the date on which the holder of the Series C
Preferred  Stock has  telecopied  a notice of  conversion  to the  Company  (the
"Conversion Date") and (B) $4.00.

           In the event the shares of Series C Preferred Stock are not converted
within  ten  business  days of  receipt  by the  Company  of a valid  notice  of
conversion, the Company shall pay to the holder, by wire transfer, as liquidated
damages  for such  failure  and not as a penalty,  an amount in cash equal to 1%
percent per day of the purchase price of the shares of Series C Preferred  Stock
to be converted which shall run from the initial  Conversion Date and the holder
has the option to withdraw the notice of conversion  previously sent;  provided,
that the Company shall not be responsible for or required to pay such liquidated
damages if such failure to convert was not caused by any actions or omissions of
the Company.


                                      -16-

<PAGE>



           No fractional  shares of Common Stock shall be issued upon conversion
of the Series C Preferred  Stock. In lieu of any fractional  shares to which the
holder would  otherwise be  entitled,  the Company  shall pay cash equal to such
fraction  multiplied  by the  fair  market  value  of the  Common  Stock  on the
Conversion Date, as determined by the Company's Board of Directors.  The Company
shall not be obligated  to issue  certificates  evidencing  the shares of Common
Stock issuable upon conversion  unless either the  certificates  evidencing such
shares of Series C Preferred  Stock are delivered to the Company or its transfer
agent as provided  above,  or the holder  notifies  the Company or its  transfer
agent that such certificates have been lost, stolen or destroyed and executes an
agreement  satisfactory  to the Company to  indemnify  the Company from any loss
incurred by it in connection with such certificates.

           Upon any conversion of Series C Preferred Stock, the shares of Series
C Preferred  Stock that are  converted  shall not be  reissued  and shall not be
considered  outstanding  for any  purposes.  Upon  conversion of all of the then
outstanding  Series C Preferred Stock,  shares of Series C Preferred Stock shall
not be deemed  outstanding for any purpose  whatsoever and all such shares shall
be retired and canceled and shall not be reissued.

           On May 15, 2000, the holders of the Series C Preferred Stock shall be
required to convert all of their outstanding  shares of Series C Preferred Stock
into shares of Common Stock.  Until converted,  the Company shall be entitled to
redeem shares of Series C Preferred  Stock in accordance with the Certificate of
Designation,  regardless  of  whether  or not a notice  of  conversion  has been
received by the Company with respect to such shares.

           The Company  shall at all times when any shares of Series C Preferred
Stock shall be outstanding, reserve and keep available out of its authorized but
unissued stock, such number of shares of Common Stock as shall from time to time
be sufficient to effect the  conversion  of all  outstanding  shares of Series C
Preferred Stock.

           Redemption.  At any time after May 15, 1998,  the Company may, at the
option of the Board of Directors, redeem up to 100% of the outstanding shares of
the Series C Preferred Stock at the applicable redemption price, provided,  that
(x) the  Company  shall  have  received  a  notice  of  conversion,  and (y) the
Conversion  Price is below  $3.40.  The  Company  shall give  written  notice by
telecopy,  to the holder of Series C Preferred Stock to be redeemed at least one
business  day  after  receipt  of the  notice  of  conversion  prior to the date
specified for redemption (the  "Redemption  Date").  Such notice shall state the
Redemption  Date, the Redemption Price (as hereinafter  defined),  the number of
shares of Series C Preferred Stock of such holders to be redeemed and shall call
upon such  holders to  surrender  to the Company on the  Redemption  Date at the
place  designated in the notice such holders'  redeemed stock. If fewer than all
the  outstanding  shares of Series C  Preferred  Stock are to be  redeemed,  the
redemption  shall be pro rata among the holders of Series C Preferred  Stock and
subject to such other provisions as may be determined by the Board of Directors.
The  Redemption  Date  shall be no more than 10 days  after  receipt  of written
notice from the Company. If the Company fails to pay the Redemption Price on the
Redemption  Date,  the Company shall pay to the holder a penalty in an amount in
cash equal to 2% percent of the Redemption  Price to be paid on such  Redemption
Date. If the Company fails to pay the Redemption  Price on the Redemption  Date,
the  holder  shall  have the  right to  convert  the  Series C  Preferred  Stock
previously presented to the Company and not redeemed. The Company shall have the
right to redeem  the  Series C  Preferred  Stock in any  subsequent  redemption;
provided,  however,  that if the Company fails to pay the Redemption  Price in a
subsequent redemption within 10 days, the Company shall have the right to redeem
the Series C Preferred Stock thereafter only upon wiring the Redemption Price to
the holders  simultaneously  with sending the notice of redemption.  On or after
the Redemption  Date,  the holders of shares of Series C Preferred  Stock called
for redemption shall surrender the certificates evidencing the shares called for
redemption  to the  Company  at the place  designated  in such  notice and shall
thereupon be entitled to receive payment of the Redemption Price.


                                      -17-

<PAGE>



           The  Company  shall have the option to redeem all or a portion of all
the outstanding shares of Series C Preferred Sock at a cash price equal to $3.40
multiplied  by the number of shares the Series C Preferred  Stock would  convert
into on the date of redemption.

           From and after the Redemption  Date (unless  default shall be made by
the Company in duly paying the Redemption  Price in which case all the rights of
the holders of such  shares  shall  continue),  the holders of the shares of the
Series C Preferred Stock called for redemption shall cease to have any rights as
stockholders of the Company, except the right to receive,  without interest, the
Redemption Price thereof upon surrender of certificates  representing the shares
of Series C Preferred Stock, and such shares shall not thereafter be transferred
(except  with the consent of the  Company) on the books of the Company and shall
not be deemed outstanding for any purpose whatsoever.

           There  shall be no  redemption  of any  shares of Series C  Preferred
Stock of the Company where such action would be in violation of applicable law.

           Voting  Rights.  Except as otherwise  required by law, the holders of
the  Series C  Preferred  Stock  shall not be  entitled  to vote upon any matter
relating to the business or affairs of the Company or for any other purpose.

           Status.  In case any  outstanding  shares of Series C Preferred Stock
shall be  redeemed,  the shares so  redeemed  shall be deemed to be  permanently
canceled and shall not resume the status of  authorized  but unissued  shares of
Series C Preferred Stock.

           Ranking;  Changes  Affecting  Series C Preferred  Stock. The Series C
Preferred   Stock  shall,   with  respect  to  dividend  rights  and  rights  on
liquidation, winding up and dissolution, (i) rank senior to any of the Company's
Common Stock and any other class or series of stock of the Company  which by its
terms shall rank junior to the Series C Preferred Stock, and (ii) rank junior to
any other class or series of stock of the Company  which by its terms shall rank
senior to the Series C Preferred Stock and (iii) rank on a pari passu basis with
the Series C and any other series of Preferred Stock of the Company.

           So long as any shares of Series C  Preferred  Stock are  outstanding,
the  Company  shall  not (i)  alter or  change  any of the  powers  preferences,
privileges,  or  rights  of the  Series C  Preferred  Stock;  or (ii)  amend the
provisions of the Certificate of Designation affecting the ranking of the Series
C Preferred  Stock,  without  first  obtaining  the  approval by vote or written
consent, in the manner provided by law, of the holders of at least a majority of
the outstanding  shares of Series C Preferred Stock, as to changes affecting the
Series C Preferred Stock.

           Other Designations of Preferred Stock
           -------------------------------------

           As of the date of this Prospectus, the Company has not designated any
shares of  Preferred  Stock  other than the Series A Preferred  Stock,  Series B
Preferred  Stock and  Series C  Preferred  Stock.  There are no other  shares of
Preferred Stock outstanding, and the Company currently has no plans to issue any
other shares of Preferred Stock.


                                      -18-

<PAGE>



                    DELAWARE BUSINESS COMBINATION PROVISIONS

           As a Delaware  corporation,  the  Company  is subject to Section  203
("Section  203") of the Delaware  General  Corporation  Law (the "DGCL"),  which
regulates large accumulations of shares,  including those made by tender offers.
Section 203 may have the effect of significantly  delaying a purchaser's ability
to acquire  the  entire  interest  in the  Company  if such  acquisition  is not
approved by the Company's Board of Directors.  In general,  Section 203 prevents
an "Interested Stockholder" (defined generally as a person with 15% or more of a
corporation's   outstanding   voting   stock)  from   engaging  in  a  "Business
Combination"  (defined  below)  with a  Delaware  corporation  for  three  years
following the date such person became an Interested Stockholder. For purposes of
Section  203,  the term  "Business  Combination"  is defined  broadly to include
mergers  and  certain  other  transactions  with  or  caused  by the  Interested
Stockholder,  sales or other dispositions to the Interested  Stockholder (except
proportionately  with the  corporation's  other  stockholders)  of assets of the
corporation or a subsidiary  equal to 10% or more of the aggregate  market value
of the corporation's  consolidated assets or its outstanding stock; the issuance
or transfer by the  corporation  or a subsidiary of stock of the  corporation or
such  subsidiary  to the  Interested  Stockholder  (except  for  transfers  in a
conversion or exchange or a pro-rata distribution or certain other transactions,
none of which increase the Interested  Stockholder's  proportionate ownership of
any class or series of the corporation's or such subsidiary's stock); or receipt
by  the  Interested  Stockholder  (except  proportionately  as  a  stockholder),
directly or indirectly,  of any loans,  advances,  guarantees,  pledges or other
financial benefits provided by or through the corporation or a subsidiary.

           The three-year moratorium imposed on Business Combinations by Section
203 does not apply if: (a) prior to the date on which a  stockholder  becomes an
Interested  Stockholder,  the Company's  Board of Directors  approves either the
Business  Combination or the transaction that resulted in the person becoming an
Interested  Stockholder,   (b)  the  Interested  Stockholder  owns  85%  of  the
corporation's voting stock upon consummation of the transaction that made him or
her an Interested  Stockholder  (excluding from the 85% calculation shares owned
by  directors  who are also  officers  of the  corporation  and  shares  held by
employee  stock plans  which do not permit  employees  to decide  confidentially
whether  to accept a tender or  exchange  offer);  or (c) on or after the date a
person  becomes an  Interested  Stockholder,  the  Company's  Board of Directors
approves  the Business  Combination,  and it is also  approved at a  stockholder
meeting  by  two-thirds  of  the  voting  stock  not  owned  by  the  Interested
Stockholder.

           Under Section 203, the restrictions  described above do not apply if,
among other things,  the  corporation's  original  certificate of  incorporation
contains a provision  electing not to be governed by Section 203. The  Company's
Certificate of Incorporation does not contain such a provision. The restrictions
described above also do not apply to certain Business  Combinations  proposed by
an Interested  Stockholder  following the announcement or notification of one of
certain  extraordinary  transactions  involving the corporation and a person who
had not been an Interested  Stockholder  during the previous  three years or who
became  an  Interested  Stockholder  with  the  approval  of a  majority  of the
corporation's directors.

                              PLAN OF DISTRIBUTION

           The  distribution  of the Shares by the Selling  Stockholders  may be
effected from time to time in one or more transactions  (which may involve block
transactions),  in special offerings,  exchange  distributions  and/or secondary
distributions,  in  negotiated  transactions,  in  settlement  of short sales of
Shares, or a combination or such methods of sale, at market prices prevailing at
the time of sale,  at prices  related  to such  prevailing  market  prices or at
negotiated prices. Such transactions may be effected on a stock exchange, on the
over-the-counter  market or privately.  The Selling Stockholders may effect such
transactions by selling the Shares to or through


                                      -19-

<PAGE>



broker-dealers,  and such broker-dealers may receive compensation in the form of
underwriting discounts, concessions or commissions from the Selling Stockholders
for whom they may act as agent (which compensation may be in excess of customary
commissions). Without limiting the foregoing, such brokers may act as dealers by
purchasing any and all of the Shares covered by this Prospectus either as agents
for others or as principals for their own accounts and reselling such securities
pursuant to this Prospectus.  The Selling Stockholders and any broker-dealers or
other persons acting on the behalf of parties that participate with such Selling
Stockholders in the  distribution of the Shares may be deemed to be underwriters
and any  commissions  received  or profit  realized by them 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,  the Company is not aware of
any agreement, arrangement or understanding between any broker or dealer and the
Selling Stockholders with respect to the offer or sale of the Shares pursuant to
this Prospectus.

           At the time that any  particular  offering of Shares is made,  to the
extent  required  by  the  Securities  Act,  a  prospectus  supplement  will  be
distributed,  setting forth the terms of the  offering,  including the aggregate
number of  Shares  being  offered,  the names of any  underwriters,  dealers  or
agents,  any discounts,  commissions and other items  constituting  compensation
from the Selling  Stockholders  and any  discounts,  commissions  or concessions
allowed or reallowed or paid to dealers.

           Each of the  Selling  Stockholders  may from time to time  pledge the
Shares  owned  by it to  secure  margin  or  other  loans  made to such  Selling
Stockholder.  Thus,  the  person or entity  receiving  the  pledge of any of the
Shares may sell them, in a foreclosure sale or otherwise,  in the same manner as
described above for such Selling Stockholder.

           The Company will not receive any of the proceeds from any sale of the
Shares by the Selling Stockholders offered hereby.

           Pursuant to the Registration  Rights Agreements,  the Company and the
Selling  Stockholders  have  agreed to  indemnify  each  other  against  certain
liabilities,  including  liabilities under the Securities Act. The Company shall
bear  customary  expenses  incident  to the  registration  of the Shares for the
benefit of the Selling  Stockholders in accordance with such  agreements,  other
than underwriting discounts and commissions directly attributable to the sale of
such securities by or on behalf of the Selling Stockholders.

           The Company has agreed to maintain  the  Registration  Statement,  of
which this  Prospectus  is a part,  effective  until the earlier of (i) the date
that all of the Shares  registered under such  Registration  Statement have been
sold; (ii) the date the holders of the Shares receive an opinion of counsel that
all of the Shares may be sold under the provisions of Rule 144 or (iii) five and
one-half years after the completion of the Private Placement.

                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

           Section  145 of 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


                                      -20-

<PAGE>



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  shall be made in
respect of any claim,  issue or matter as to which such  person  shall 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.

           The Company's  Certificate of  Incorporation  provides that directors
shall not be  personally  liable  for  monetary  damages  to the  Company or its
stockholders  for breach of fiduciary  duty as a director,  except for liability
resulting from a breach of the director's  duty of loyalty to the Company or its
stockholders,  intentional  misconduct  or wilful  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.  The Company's
Certificate  of  Incorporation  also  authorizes  the Company to  indemnify  its
officers, directors and other agents, by bylaws, agreements or otherwise, to the
fullest  extent  permitted  under  Delaware law. The Company has entered into an
Indemnification  Agreement (the  "Indemnification  Agreement")  with each of its
directors  and officers  which may, in some cases,  be broader than the specific
indemnification   provisions   contained  in  the   Company's   Certificate   of
Incorporation or as otherwise permitted under Delaware law. Each Indemnification
Agreement  may require  the  Company,  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.

           Pursuant to the Registration  Rights  Agreement,  the Company and the
Selling  Stockholders  have  agreed to  indemnify  each  other  against  certain
liabilities, including liabilities under the Securities Act.

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

           Insofar  as  indemnification   for  liabilities   arising  under  the
Securities Act 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 Act and is, therefore, unenforceable.

                                  LEGAL MATTERS

           The validity of the securities offered hereby will be passed upon for
the Company by Parker Chapin Flattau & Klimpl,  LLP, New York, New York.  Martin
Eric  Weisberg,  Esq., a member of the firm,  is a Director and the Secretary of
the Company.



                                      -21-

<PAGE>



                                     EXPERTS

           The consolidated  balance sheets as of December 31, 1997 and 1996 and
the related consolidated statements of operations, stockholders' equity and cash
flows for the years then ended,  incorporated  by reference in this  Prospectus,
have been  incorporated  herein in reliance on the report  dated March 31, 1998,
which includes an  explanatory  paragraph,  concerning the Company's  ability to
continue as a going concern,  of  PricewaterhouseCoopers  LLP (Coopers & Lybrand
L.L.P.),  independent  accountants,  given  on their  authority  as  experts  in
accounting and auditing.













                                      -22-

<PAGE>





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

   NO DEALER, SALESPERSON OR ANY OTHER
PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION    OR    TO    MAKE    ANY
REPRESENTATION  NOT  CONTAINED IN THIS
PROSPECTUS   WITH   RESPECT   TO   THE
OFFERING MADE HEREBY.  THIS PROSPECTUS
DOES NOT  CONSTITUTE  AN OFFER TO SELL
OR A  SOLICITATION  OF AN OFFER TO BUY       
ANY OF THE  SECURITIES  OFFERED HEREBY       
TO  ANY  PERSON  OR BY  ANYONE  IN ANY       
JURISDICTION  IN WHICH  SUCH  OFFER OR       
SOLICITATION MAY NOT LAWFULLY BE MADE.       
NEITHER    THE    DELIVERY   OF   THIS       165,441 SHARES OF COMMON STOCK
PROSPECTUS NOR ANY SALE MADE HEREUNDER                                     
SHALL, UNDER ANY CIRCUMSTANCES, CREATE                                     
ANY IMPLICATION THAT THERE HAS BEEN NO                                     
CHANGE  IN THE  INFORMATION  SET FORTH                                     
HEREIN  OR  IN  THE  BUSINESS  OF  THE                                     
COMPANY SINCE THE DATE HEREOF.                                             
                                                                           
                                                                           
                                                                           
          TABLE OF CONTENTS                                                
                                                                           
                                  Page                 ----------          
                                                       PROSPECTUS          
Available Information............... 2                 ----------          
Incorporation of Certain Documents                                         
     by Reference................... 2
Prospectus Summary.................. 3                                     
Risk Factors........................ 4                                     
Use of Proceeds.....................13                                     
Selling Stockholders ...............14                                     
Description of Securities...........15             ____________, 1998      
Delaware Business Combination         
     Provisions.....................19
Plan of Distribution ...............19
Indemnification for Securities Act 
     Liabilities....................20
Legal Matters.......................21
Experts ............................22

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


<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 the Company 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 ...............   $231.07
            Legal fees and expenses .............................   $15,000
            Miscellaneous expenses ..............................   $ 1,000
                                                                    -------
                 Total ..........................................   $16,231
                                                                    =======

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  shall be made in
respect of any claim,  issue or matter as to which such  person  shall 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.

           The Company's  Certificate of  Incorporation  provides that directors
shall not be  personally  liable  for  monetary  damages  to the  Company or its
stockholders  for breach of fiduciary  duty as a director,  except for liability
resulting from a breach of the director's  duty of loyalty to the Company or its
stockholders,  intentional  misconduct  or wilful  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.  The Company's
Certificate  of  Incorporation  also  authorizes  the Company to  indemnify  its
officers, directors and other agents, by bylaws, agreements or otherwise, to the
fullest  extent  permitted  under  Delaware law. The Company has entered into an
Indemnification  Agreement (the  "Indemnification  Agreement")  with each of its
directors  and officers  which may, in some cases,  be broader than the specific
indemnification   provisions   contained  in  the   Company's   Certificate   of
Incorporation or as otherwise permitted under Delaware law. Each


                                     II - 1

<PAGE>



Indemnification  Agreement  may require the  Company,  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.

           The Company maintains 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           Certificate of Designation for Series C Preferred Stock
4.2           5% Convertible Preferred Stock and Common Stock Purchase
              Agreement.
5.1           Opinion of Parker Chapin Flattau & Klimpl, LLP.
10.1          Form of Registration Rights Agreement
23.1          Consent of PricewaterhouseCoopers LLP
23.2          Consent of Parker Chapin Flattau & Klimpl, LLP (included in their
              opinion filed as Exhibit 5.1).
24.1          Power of Attorney (included on page II-4).

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)  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 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;



                                     II - 2

<PAGE>



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



                                     II - 3

<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 July 9, 1998.


                                                XYBERNAUT CORPORATION


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


                                POWER OF ATTORNEY

           KNOW ALL MEN BY THESE PRESENTS,  that each individual whose signature
appears  below  constitutes  Edward G. Newman and Steven A. Newman,  each acting
alone,  his true and  lawful  attorney-in-fact  and  agent,  with full  power of
substitution  and  resubstitution,  for him and in his name, place and stead, in
any and all capacities, to sign any and all amendments (including post-effective
amendments)  to this  registration  statement and to file the same with exhibits
thereto,  and all documents in connection  therewith,  with the  Securities  and
Exchange Commission,  granting unto said  attorneys-in-fact and agents, and each
of them, full power and authority to do and perform each and every act and thing
requisite and  necessary to be done in and about the  premises,  as fully to all
intents and  purposes as he might or could do in person,  hereby  ratifying  and
confirming all that said  attorneys-in-fact  and agents or any of them, or their
or his substitute or substitutes,  may lawfully do or cause to be done by virtue
hereof.

           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 and on the date indicated.


    SIGNATURE                          TITLE                            DATE
    ---------                          -----                            ----

/s/ Edward G. Newman               Chairman of the Board,           July 9, 1998
- -----------------------------      President and Chief Executive
Edward G. Newman                   Officer


/s/ Kaz Toyosato                   Executive Vice President -       July 9, 1998
- -----------------------------      Asian Operations and Director
Kaz Toyosato                                         


/s/ W. Jeff Pagano                 Comptroller                      July 9, 1998
- -----------------------------
W. Jeff Pagano


                                     II - 4

<PAGE>


    SIGNATURE                          TITLE                            DATE
    ---------                          -----                            ----

/s/ Martin Eric Weisberg           Secretary and Director           July 9, 1998
- -----------------------------
Martin Eric Weisberg


/s/ Harry E. Soyster               Director                         July 9, 1998
- -----------------------------
Lt. Gen. Harry E. Soyster


/s/ James J. Ralabate              Director                         July 9, 1998
- -----------------------------
James J. Ralabate


/s/ Keith P. Hicks                 Director                         July 9, 1998
- -----------------------------
Keith P. Hicks


/s/ Steven A. Newman               Director                         July 9, 1998
- -----------------------------
Steven A. Newman


/s/ Phillip E. Pearce              Director                         July 9, 1998
- -----------------------------
Phillip E. Pearce

/s/ Eugene J. Amobi                Director                         July 9, 1998
- -----------------------------
Eugene J. Amobi



By:    /s/ Edward G. Newman
     -------------------------
     Edward G. Newman
     Attorney-in-fact






<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)



                                  JULY 16, 1998



<PAGE>



                                  EXHIBIT INDEX


EXHIBIT NO.    DESCRIPTION OF DOCUMENT                             PAGE NO./REF.
- -----------    -----------------------                             -------------

4.1            Certificate of Designation for Series C
               Preferred Stock
4.2            5% Convertible Preferred Stock and Common 
               Stock Purchase Agreement.
5.1            Opinion of Parker Chapin Flattau & Klimpl, LLP.
10.1           Form of Registration Rights Agreement
23.1           Consent of PricewaterhouseCoopers  LLP
23.2           Consent of Parker Chapin Flattau & Klimpl, LLP
               (included in their opinion filed as Exhibit 5.1).
24.1           Power of Attorney (see page II-4 to the 
               Registration Statement).



                                       -2-



                                                                     Exhibit 4.1

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



                           CERTIFICATE OF DESIGNATION

                                       OF

                              XYBERNAUT CORPORATION



                     Pursuant to Section 151 of the General

                    Corporation Law of the State of Delaware



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

                            SERIES C PREFERRED STOCK

            Xybernaut  Corporation,  a Delaware corporation (the "Corporation"),
hereby  certifies  that the  following  resolution  has been duly adopted by the
Board of Directors of the Corporation:

                  RESOLVED,  that pursuant to the authority expressly granted to
            and  vested  in the Board of  Directors  of the  Corporation  by the
            provisions of the  Certificate of  Incorporation  of the Corporation
            (the "Certificate of Incorporation"),  there hereby is created,  out
            of the  6,000,000  shares of  Preferred  Stock,  par value $0.01 per
            share,  of the  Corporation  authorized  in  Article  Fourth  of the
            Certificate of Incorporation  (the "Preferred  Stock"),  a series of
            the  Preferred  Stock of the  Corporation  consisting of 375 shares,
            which  series  shall  have  the  following   powers,   designations,
            preferences and relative, participating,  optional and other rights,
            and the following qualifications, limitations and restrictions:

1.          Designation  and  Amount.  This series of  Preferred  Stock shall be
            designated  "Series C Preferred Stock" and the authorized  number of
            shares  constituting  such series shall be 375. The par value of the
            Series C  Preferred  Stock  shall be $0.01 per  share.  The Series C
            Preferred Stock shall have a stated value of $1,000 per share.

2.          Dividends.

                  (a) The holders of shares of Series C Preferred Stock shall be
            entitled to receive, out of any assets at the time legally available
            therefor  and  when  and as  declared  by the  Board  of  Directors,
            dividends at the rate of five percent (5%) of the stated Liquidation
            Preference  (as  defined  below) per share per  annum,  and no more,
            payable,  in  the  discretion  of  the  Board  of  Directors  of the
            Corporation  in shares of the common stock of the  Corporation,  par
            value  $0.01  per  share  (the  "Common  Stock"),  or in cash.  Such
            dividends  on the Series C Preferred  Stock shall be payable only at
            conversion of the Series


<PAGE>



            C Preferred Stock into shares of Common Stock. Such dividends on the
            Series  C  Preferred  Stock  are  prior  and  in  preference  to any
            declaration or payment of any distribution (as defined below) on any
            outstanding shares of Common Stock or any other equity securities of
            the  Corporation  ranking  junior to the  Preferred  Stock as to the
            payment of dividends.  Such dividends  shall accrue on each share of
            Series C  Preferred  Stock  from day to day from the date of initial
            issuance  thereof  whether or not earned or declared so that if such
            dividends with respect to any previous  dividend  period at the rate
            provided for herein have not been paid on, or declared and set apart
            for, all shares of Series C Preferred Stock at the time outstanding,
            the  deficiency  shall be fully paid on, or  declared  and set apart
            for,  such  shares  on a  pro  rata  basis  with  all  other  equity
            securities of the Corporation ranking on a parity with the Preferred
            Stock as to the payment of dividends before any  distribution  shall
            be paid on, or declared  and set apart for Common Stock or any other
            equity securities of the Corporation ranking junior to the Preferred
            Stock as to the payment of dividends.

                  (b)  For  purposes  hereof,   unless  the  context   otherwise
            requires, "distribution" shall mean the transfer of cash or property
            without  consideration,  whether by way of  dividend  or  otherwise,
            payable  other  than in  shares  of  Common  Stock or  other  equity
            securities  of the Company,  or the purchase or redemption of shares
            of the Corporation  (other than redemptions set forth in Paragraph 5
            below  or   repurchases   of  Common  Stock  held  by  employees  or
            consultants of the Corporation  upon termination of their employment
            or services  pursuant to agreements  providing for such  repurchase)
            for cash or property.

3.          Preferences on Liquidation.

                  (a) In the event of any voluntary or involuntary  liquidation,
            dissolution, or winding up of the Corporation, the holders of shares
            of the Series C Preferred Stock then outstanding,  shall be entitled
            to be paid,  out of the  assets  of the  Corporation  available  for
            distribution to its stockholders,  whether from capital,  surplus or
            earnings,  before  any  payment  shall  be  made in  respect  of the
            Corporation's  Common  Stock,  an  amount  equal  to the  sum of one
            thousand  dollars  ($1,000.00) per share of Series C Preferred Stock
            (the  "Liquidation   Preference"),   plus  all  accrued  and  unpaid
            dividends thereon to the date of payment.

                  (b) If upon  liquidation,  dissolution,  or  winding up of the
            Corporation,   the   assets  of  the   Corporation   available   for
            distribution  to its  stockholders  shall be insufficient to pay the
            holders  of the  Series  C  Preferred  Stock  the  full  Liquidation
            Preference   plus  accrued  and  unpaid   dividends  to  which  they
            respectively  shall  be  entitled,  the  holders  of  the  Series  C
            Preferred  Stock  together  with the holders of any other  series of
            Preferred  Stock  ranking on a parity  with the  Series C  Preferred
            Stock as to the payments of amounts upon liquidation, dissolution or
            winding  up  shall  share  ratably  in any  distribution  of  assets
            according  to the  respective  amounts  which  would be  payable  in
            respect  of all  such  shares  held by the  respective  stockholders
            thereof  upon such  distribution  if all amounts  payable on or with
            respect to said shares were paid in full.

                  (c) For  purposes  of this  Paragraph  2,  the  sale or  other
            disposition  (for  cash,  shares  of  stock,   securities  or  other
            consideration),  of all or  substantially  all of the  assets of the
            Corporation  shall be deemed  to be a  liquidation,  dissolution  or
            winding up of the Corporation but the merger or consolidation of the
            Corporation  into  or with  another  corporation  into  or with  the
            Corporation, shall not be deemed to be a liquidation,  winding up or
            dissolution of the Corporation.


                                       2
<PAGE>



                  (d) The  holders  of Series C  Preferred  Stock  shall have no
            priority or  preference  with respect to  distributions  made by the
            Corporation  in connection  with the  repurchase of shares of Common
            Stock issued to or held by employees,  directors or consultants upon
            termination of their  employment or services  pursuant to agreements
            providing for the right of said  repurchase  between the Corporation
            and such persons.

4.          Conversion Rights.

                  The holders of Series C Preferred  Stock shall have conversion
rights as follows:

                  (a) No  shares of Series C  Preferred  Stock may be  converted
            prior to August 15, 1998.  At any time after August 15, 1998 through
            November 14, 1998, up to twenty-five  (25%) percent of the shares of
            Series C Preferred Stock then  outstanding may be converted,  at the
            option of the holders thereof,  and thereafter on November 15, 1998,
            February 15, 1999 and May 15, 1999, an additional  twenty-five (25%)
            percent of the shares of Series C Preferred  Stock then  outstanding
            may be converted,  on a cumulative and pro rata basis, at the option
            of the  holders  thereof.  The  number of  shares of fully  paid and
            nonassessable  Common  Stock  into  which  each  share  of  Series C
            Preferred Stock may be converted shall be determined by dividing the
            Liquidation  Preference  by the  Conversion  Price  (as  hereinafter
            defined) in effect on the Conversion Date.

                  (b) For purposes of this Paragraph 4, (i)  "Conversion  Price"
            means an amount equal to the lesser of (a) 100 percent (100%) of the
            average  closing bid price of the Common Stock as reported by Nasdaq
            Small Cap Market or any successor exchange in which the Common Stock
            is listed for the five (5) trading  days  preceding  the  Conversion
            Date, or (b) Four ($4.00) Dollars;  and (ii) "Conversion Date" means
            the date on which the  holder of the  Series C  Preferred  Stock has
            telecopied the Notice of Conversion (as hereinafter  defined) to the
            Corporation.

                  (c) A holder  may  convert  in whole or in part,  the Series C
            Preferred Stock into Common Stock held by such holder by telecopying
            an executed and  completed  Notice of Conversion in the form annexed
            hereto as Exhibit A (a "Notice of  Conversion")  to the  Corporation
            and delivering the original Notice of Conversion and the certificate
            representing   the  shares  of  Series  C  Preferred  Stock  to  the
            Corporation  by express  courier within five (5) business days after
            the date of the Notice of Conversion. Each date on which a Notice of
            Conversion  is  telecopied  to and  received by the  Corporation  in
            accordance  with the provisions  hereof shall be deemed a Conversion
            Date. The Corporation  will transmit the  certificates  representing
            the Common Stock issuable upon  conversion of all or any part of the
            shares of Series C Preferred  Stock  (together with the  certificate
            representing  portions of the shares of Series C Preferred Stock not
            so  converted)  to the holder via  express  courier  within five (5)
            business days after the Corporation has received the original Notice
            of Conversion and shares certificate being so converted.  The Notice
            of Conversion and certificate representing the portion of the shares
            of Series C Preferred  Stock  converted  shall be  delivered  to the
            Corporation  at its  principal  executive  offices  or to such other
            person at such  other  place as the  Corporation  designates  to the
            holder in  writing.  In the event the  shares of Series C  Preferred
            Stock are not converted  within ten (10) business days of receipt by
            the  Corporation  of a valid Notice of Conversion  and  certificates
            representing the shares of Series C Preferred Stock to be converted,
            the  Corporation  shall  pay to the  holder,  by wire  transfer,  as
            liquidated damages for such failure and not as a penalty,  an amount
            in cash equal to one (1%) percent per day of the  purchase  price of
            the shares of Series C Preferred  Stock to be converted  which shall
            run from the initial  Conversion  Date and the holder has the option
            to withdraw the Notice of Conversion previously sent;


                                       3
<PAGE>



            provided,  that the  Corporation  shall  not be  responsible  for or
            required to pay such  liquidated  damages if such failure to convert
            was not caused by any actions or omissions of the Corporation.

                  (d) No fractional  shares of Common Stock shall be issued upon
            conversion  of  the  Series  C  Preferred  Stock.  In  lieu  of  any
            fractional  shares to which the holder would  otherwise be entitled,
            the Corporation shall pay cash equal to such fraction  multiplied by
            the fair market value of the Common Stock on the Conversion Date, as
            determined by the Corporation's Board of Directors.  The Corporation
            shall not be obligated to issue  certificates  evidencing the shares
            of  Common  Stock  issuable  upon   conversion   unless  either  the
            certificates  evidencing such shares of Series C Preferred Stock are
            delivered  to the  Corporation  or its  transfer  agent as  provided
            above,  or the holder notifies the Corporation or its transfer agent
            that such  certificates  have been  lost,  stolen or  destroyed  and
            executes an agreement  satisfactory  to the Corporation to indemnify
            the Corporation from any loss incurred by it in connection with such
            certificates.

                  (e) Subject to subparagraph (b) above, the Corporation  shall,
            as soon as practicable after such delivery,  or after such agreement
            and indemnification, issue and deliver at such office to such holder
            of Series C Preferred  Stock, a certificate or certificates  for the
            number  of  shares of  Common  Stock to which  the  holder  shall be
            entitled as aforesaid and a check  payable to the holder,  or order,
            in the  amount  of any  cash  amounts  payable  as the  result  of a
            conversion into fractional  shares of Common Stock, plus any accrued
            and unpaid  dividends on the converted Series C Preferred Stock, and
            a  certificate  for any  shares of Series C  Preferred  Stock not so
            converted.

                  (f) Upon any  conversion of Series C Preferred  Stock pursuant
            to this Paragraph 4 the shares of Series C Preferred Stock which are
            converted  shall  not  be  reissued  and  shall  not  be  considered
            outstanding  for any  purposes.  Upon  conversion of all of the then
            outstanding  Series C Preferred  Stock  pursuant to this Paragraph 4
            and upon the taking of any action  required by law,  all matters set
            forth in this  Certificate of Designation  shall be eliminated  from
            the Certificate of Incorporation, shares of Series C Preferred Stock
            shall not be deemed  outstanding for any purpose  whatsoever and all
            such shares shall be retired and canceled and shall not be reissued.

                  (g) Any  transmittal or other  communications  required by the
            provisions of this  Paragraph 4 to be given to the holders of shares
            of Series C Preferred  Stock shall be deemed  given if  deposited in
            the United States mail,  first class,  postage prepaid and addressed
            to each  holder of record at its address  appearing  on the books of
            the Corporation.

                  (h) On May 15,  2000,  the holder shall be required to convert
            all of its  outstanding  shares of  Series C  Preferred  Stock  into
            shares of Common Stock. Until converted in accordance with the terms
            of this  Paragraph 4, the Company shall be entitled to redeem shares
            of Series C Preferred  Stock in accordance  with Paragraph 5 hereof,
            regardless  of  whether  or not a  Notice  of  Conversion  has  been
            received by the Corporation with respect to such shares.

                  (i) The  Corporation  shall at all  times  when any  shares of
            Series C  Preferred  Stock  shall be  outstanding,  reserve and keep
            available out of its authorized but unissued  stock,  such number of
            shares of Common Stock as shall from time to time be  sufficient  to
            effect  the  conversion  of  all  outstanding  shares  of  Series  C
            Preferred Stock.



                                        4

<PAGE>



5.          Redemption.

                  (a) At any time after May 15, 1998,  the  Corporation  may, at
            the  option  of the  Board of  Directors,  redeem  up to 100% of the
            outstanding shares of the Series C Preferred Stock at the redemption
            price set forth in subparagraph  (b) below,  provided,  that (x) the
            Corporation shall have received a Notice of Conversion,  and (y) the
            Conversion Price is below $3.40. The Corporation  shall give written
            notice by telecopy,  to the holder of Series C Preferred Stock to be
            redeemed at least one (1) business  day after  receipt of the Notice
            of  Conversion  prior  to the date  specified  for  redemption  (the
            "Redemption  Date").  Such notice  shall be  addressed  to each such
            stockholder at the address of such holder  appearing on the books of
            the  Corporation or given by such holder to the  Corporation for the
            purpose of notice,  or if no such address appears or is so given, at
            the place where the principal  office of the Corporation is located.
            Such notice shall state the Redemption  Date,  the Redemption  Price
            (as hereinafter defined), the number of shares of Series C Preferred
            Stock of such  holders  to be  redeemed  and  shall  call  upon such
            holders to surrender to the  Corporation on the  Redemption  Date at
            the place designated in the notice such holders'  redeemed stock. If
            fewer than all the  outstanding  shares of Series C Preferred  Stock
            are to be  redeemed,  the  redemption  shall be pro rata  among  the
            holders  of Series C  Preferred  Stock  and  subject  to such  other
            provisions  as may be  determined  by the  Board of  Directors.  The
            Redemption Date shall be no more than ten (10) days after receipt of
            written notice from the Corporation. If the Corporation fails to pay
            the Redemption Price on the Redemption  Date, the Corporation  shall
            pay to the  holder a penalty  in an amount in cash equal to two (2%)
            percent of the Redemption  Price to be paid on such Redemption Date.
            If  the  Corporation  fails  to  pay  the  Redemption  Price  on the
            Redemption  Date,  the holder  shall  have the right to convert  the
            Series C Preferred Stock previously presented to the Corporation and
            not  redeemed.  The  Corporation  shall have the right to redeem the
            Series C  Preferred  Stock  in  accordance  with  the  terms of this
            subparagraph (a) in any subsequent  redemption;  provided,  however,
            that if the  Corporation  fails  to pay the  Redemption  Price  in a
            subsequent  redemption  within ten (10) days, the Corporation  shall
            have the right to redeem the Series C  Preferred  Stock  thereafter,
            only upon wiring the Redemption Price to the holders  simultaneously
            with sending the notice of  redemption.  On or after the  Redemption
            Date,  the holders of shares of Series C Preferred  Stock called for
            redemption  shall surrender the  certificates  evidencing the shares
            called for redemption to the Corporation at the place  designated in
            such notice and shall  thereupon  be entitled to receive  payment of
            the Redemption Price.

                  (b) Subject to the terms of Paragraph 5(a) above,  the Company
            shall  have  the  option  to  redeem  all or a  portion  of all  the
            outstanding shares of Series C Preferred Stock at a cash price equal
            to  $3.40  multiplied  by  the  number  of  shares  the  Convertible
            Preferred  Stock would convert into on the date of  redemption  (the
            "Redemption Price").

                  (c) From and after the Redemption  Date (unless  default shall
            be made by the  Corporation in duly paying the  Redemption  Price in
            which  case all the  rights  of the  holders  of such  shares  shall
            continue), the holders of the shares of the Series C Preferred Stock
            called for redemption shall cease to have any rights as stockholders
            of the Corporation,  except the right to receive,  without interest,
            the  Redemption   Price  thereof  upon  surrender  of   certificates
            representing the shares of Series C Preferred Stock, and such shares
            shall not thereafter be transferred  (except with the consent of the
            Corporation) on the books of the Corporation and shall not be deemed
            outstanding for any purpose whatsoever.

                  (d) There  shall be no  redemption  of any  shares of Series C
            Preferred  Stock of the  Corporation  where such action  would be in
            violation of applicable law.



                                       5
<PAGE>


6.          Voting Rights.

                  Except as otherwise required by law, the holders of the Series
            C  Preferred  Stock  shall not be  entitled  to vote upon any matter
            relating to the  business or affairs of the  Corporation  or for any
            other purpose.

7.          Status.

                  In case any  outstanding  shares of Series C  Preferred  Stock
            shall be  redeemed,  the  shares so  redeemed  shall be deemed to be
            permanently  canceled and shall not resume the status of  authorized
            but unissued shares of Series C Preferred Stock.

8.          Ranking; Changes Affecting Series C.

                  (a) The  Series C  Preferred  Stock  shall,  with  respect  to
            dividend   rights  and  rights  on   liquidation,   winding  up  and
            dissolution,  (i) rank  senior  to any of the  Corporation's  Common
            Stock and any other class or series of stock of the Company which by
            its terms  shall rank junior to the Series C  Preferred  Stock,  and
            (ii)  rank  junior  to any  other  class or  series  of stock of the
            Company  which  by its  terms  shall  rank  senior  to the  Series C
            Preferred  Stock and (iii) shall rank on a pari passu basis with any
            other series of Preferred Stock of the Corporation..

                  (b) So long as any  shares  of  Series C  Preferred  Stock are
            outstanding,  the  Corporation  shall not (i) alter or change any of
            the  powers  preferences,  privileges,  or  rights  of the  Series C
            Preferred  Stock;  or (ii) amend the provisions of this Paragraph 9,
            in each  case,  without  first  obtaining  the  approval  by vote or
            written consent, in the manner provided by law, of the holders of at
            least a majority  of the  outstanding  shares of Series C  Preferred
            Stock, as to changes affecting the Series C Preferred Stock.

            IN WITNESS WHEREOF,  the Corporation has caused this  Certificate of
Designation to be signed by its President this 15th day of May, 1998.





                                              /s/ Edward G. Newman
                                              -------------------------------
                                              Edward G. Newman, President




                                       6


                                                                     Exhibit 4.2

THESE SECURITIES HAVE NOT BEEN REGISTERED WITH THE UNITED STATES  SECURITIES AND
EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE OR OTHER POLITICAL
SUBDIVISION OF THE UNITED STATES. THESE SECURITIES ARE BEING OFFERED PURSUANT TO
AN  EXEMPTION  FROM  REGISTRATION  UNDER  REGULATION  D  PROMULGATED  UNDER  THE
SECURITIES ACT OF 1933, AS AMENDED (THE  "SECURITIES  ACT").  THE SECURITIES ARE
"RESTRICTED"  AND MAY NOT BE  RESOLD,  TRANSFERRED  OR  OFFERED  FOR  RESALE  OR
TRANSFER OR PLEDGED OR HYPOTHECATED,  EXCEPT AS PERMITTED UNDER THE ACT PURSUANT
TO REGISTRATION OR EXEMPTION  THEREFROM.  THIS SUBSCRIPTION  AGREEMENT SHALL NOT
CONSTITUTE AN OFFER TO SELL NOR A SOLICITATION OF AN OFFER TO BUY THE SECURITIES
IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION WOULD BE UNLAWFUL.

                 5% CONVERTIBLE PREFERRED STOCK AND COMMON STOCK

                               PURCHASE AGREEMENT

                              XYBERNAUT CORPORATION

            THIS  AGREEMENT  is made as of the  15th  day of  May,  1998,  among
Xybernaut  Corporation,   Nasdaq  Symbol  "XYBR"  (the  "Company"),  a  Delaware
corporation,  with its principal office at 12701 Four Lakes Circle,  Fairfax, VA
22033,  and  Libertyview  Plus Fund,  Libertyview  Fund, LLC and CPR (USA) Inc.,
(each a  "Purchaser"),  with their principal  office at c/o Libertyview  Capital
Management, 101 Hudson Street, Suite 3700, Jersey City, New Jersey 07302.

            IN  CONSIDERATION   of  the  mutual  covenants   contained  in  this
Agreement, the Company and the Purchaser agree as follows:

            Section 1. Certain Definitions. For purposes of this Agreement:

            "Agreement"  means this 5%  Convertible  Preferred  Stock and Common
Stock Purchase Agreement.

            "Closing  Date"  means  the date  agreed to by the  parties  for the
delivery of the original stock certificate  against a wire transfer of the funds
to the Company.

            "Closing"  means  the  completion  of the  purchase  and sale of the
Shares on the Closing Date.

            "Common  Shares"  means the shares of Common  stock being issued and
sold pursuant to Section 2.2 hereof.

            "Common  Stock"  means the Common  Stock of the  Company,  $0.01 par
value per share.

            "Conversion  Date"  means  the  date  on  which  the  Purchaser  has
telecopied the Notice of Conversion to the Company.


<PAGE>



            "Convertible Preferred Stock" means the shares of Series C Preferred
Stock of the Company convertible into Common Stock of the Company as hereinafter
provided;  including the  Certificate  of Designation  designating  the Series C
Preferred Stock.

            "Conversion  Price"  means an amount  equal to the lesser of (a) 100
percent of the  average  closing  bid price of the Common  Stock as  reported by
NASDAQ or any  successor  exchange  in which the Common  Stock is listed for the
five (5)  trading  days  preceding  the  Conversion  Date,  or (b) Four  ($4.00)
Dollars.

            "Conversion Shares" means the shares of Common Stock issued upon the
conversion of the Convertible Preferred Stock.

            "Purchase  Price" means the aggregate  purchase  price of the Shares
purchased.

            "Shares"  means,  collectively,  the  shares  of Common  Shares  and
Convertible Preferred Stock purchased pursuant to this Agreement.

            Section 2.   Authorization and Sale of Shares.

            2.1   Authorization.  Subject  to the terms and  conditions  of this
Agreement, the Company has authorized the sale and issuance of the Shares.

            2.2   Agreement to Sell and Purchase the Shares.  The offer and sale
of the  Shares are being made  hereunder  in  reliance  upon the  provisions  of
Regulation  D  promulgated  under the  Securities  Act of 1933,  as amended (the
"Securities  Act").  The Company will sell and the Purchasers will buy Shares in
reliance upon the  representations  and warranties of the Company and Purchasers
contained  in this  Agreement,  upon the terms and  conditions  hereinafter  set
forth, 110,294 shares of Common Stock at a price of $3.40 per share (the "Common
Shares"),  for an  aggregate  purchase  price  of  $375,000  and 375  shares  of
Convertible Preferred Stock for an aggregate purchase price of $375,000 based on
the purchase price of $1,000 per share.  The  Convertible  Preferred Stock shall
pay a 5% cumulative dividend,  payable in cash or Common Stock at the Conversion
Price,  at the discretion of the Company,  at the time of each  conversion.  The
purchase and sale of the Shares shall occur on the Closing Date.

            2.3   Time and Place of Closing.  The  Closing  shall be held at the
offices of Parker Chapin Flattau & Klimpl, LLP ("Escrow Agent"),  1211 Avenue of
the Americas, New York, NY 10036, as promptly as practicable as agreed to by the
parties to this Agreement.

            2.4   Payment  and  Delivery.  At  or  prior  to  the  Closing,  the
following shall occur:

                  (a)   Purchasers  shall remit by wire  transfer  the  Purchase
Price to Escrow  Agent  pursuant to the Escrow  Agreement,  dated May 15,  1998,
among the  Company,  Purchasers  and  Escrow  Agent  (the  "Escrow  Agreement"),
attached hereto as Attachment 1, as payment in full for the Shares.

                  (b)   Company shall deliver or cause to be delivered to Escrow
Agent a certificate representing the Shares, registered in the name of Purchaser
(or any nominee  designated by Purchaser on the Closing Date), free and clear of
all liens, claims, charges and encumbrances.

                  (c)   Wire  instructions  for Parker Chapin  Flattau & Klimpl,
LLP are as follows:


                                       2
<PAGE>



                     Citibank, N.A.

                     ABA No. 021000089

                     For Further Credit to

                     Parker Chapin Flattau & Klimpl, LLP, Attorney Trust Account

                     Account No. 37432544

All  subscription  funds shall be held in escrow by the Escrow Agent pursuant to
the terms and  conditions set forth in the Escrow  Agreement  among the Company,
the Purchasers and the Escrow Agent.

            Section 3. General  Representations  and  Warranties of the Company.
The  Company  hereby  represents  and  warrants  to,  and  covenants  with,  the
Purchasers  that the following are true and correct as of the date hereof and as
of the Closing Date.

            3.1   Organization; Qualification. The Company is a corporation duly
organized and validly existing under the laws of the State of Delaware and is in
good standing under such laws. The Company has all requisite corporate power and
authority to own, lease and operate its  properties and assets,  and to carry on
its business as presently conducted.  The Company is qualified to do business as
a  foreign  corporation  in each  jurisdiction  in which  the  ownership  of its
property or the nature of its business requires such qualification, except where
failure to so qualify would not have a material adverse effect on the Company.

            3.2   Capitalization.  The  authorized  capital stock of the Company
consists of 40,000,000  shares of Common Stock,  $0.01 par value per share,  and
6,000,000 shares of nonvoting  Preferred Stock, $0.01 par value, of 3,000 shares
have been designated  Series A Convertible  Preferred Stock, par value $0.01 per
share,  4,180 have been designated as Series B Convertible  Preferred Stock, par
value  $.01 per  share,  and 375 have been  designated  as Series C  Convertible
Preferred  Stock,  par value $.01 per share.  As of May 15,  1998,  none of such
Series A or Series B Preferred Stock is outstanding.  All issued and outstanding
shares of Common  Stock have been duly  authorized  and  validly  issued and are
fully paid and  nonassessable.  The Company will reserve from its authorized but
unissued shares of Common Stock a sufficient number of shares of Common Stock to
permit the conversion in full of the Convertible Preferred Stock subject of this
Agreement. As of the Closing Date, the Company had reserved sufficient shares of
Common Stock for issuance upon exercise of the Convertible Preferred Stock which
are convertible,  at Purchaser's option, at the Conversion Price, as per Section
9 of this Agreement.

            3.3   Authorization.  The Company has all requisite corporate right,
power and authority to execute and deliver this  Agreement and to consummate the
transactions  contemplated  hereby.  All  corporate  action  on the  part of the
Company,  its  directors  and  stockholders  necessary  for  the  authorization,
execution,  delivery and  performance  of this  Agreement  by the  Company,  the
authorization,  sale, issuance and delivery of the Shares and the performance of
the Company's obligations hereunder has been taken. This Agreement has been duly
executed and delivered by the Company and constitutes a legal, valid and binding
obligation of the Company  enforceable in accordance with its terms,  subject to
laws of general application relating to bankruptcy, insolvency and the relief of
debtors and rules of law governing  specific  performance,  injunctive relief or
other equitable remedies,  and to limitations of public policy as they may apply
to the  indemnification  provisions set forth in Section 7.3 of this  Agreement.
Upon their issuance and delivery pursuant to this


                                       3
<PAGE>



Agreement,  the Shares will be validly issued,  fully paid and nonassessable and
will be free of any liens or encumbrances;  provided,  however,  that the Shares
are subject to  restrictions  on transfer under state and/or federal  securities
laws.  The issuance and sale of the Shares will not give rise to any  preemptive
right or right of first  refusal  or right of  participation  on  behalf  of any
person.

            3.4   No Conflict.  The execution and delivery of this  Agreement do
not, and the  consummation  of the  transactions  contemplated  hereby will not,
conflict  with,  or result in any  violation  of, or default,  or give rise to a
right of termination, cancellation or acceleration of any material obligation or
to a loss of a  material  benefit,  under,  any  provision  of the  Articles  of
Incorporation,  and any amendments thereto, Bylaws,  Stockholders Agreements and
any amendments thereto of the Company or any material mortgage, indenture, lease
or other  agreement  or  instrument,  permit,  concession,  franchise,  license,
judgment,  order, decree statute, law, ordinance,  rule or regulation applicable
to the Company, its properties or assets and which would have a material adverse
effect on the Company's business and financial condition.

            3.5   Accuracy  of Reports and  Information.  The Company is in full
compliance,  to the extent  applicable,  with all  reporting  obligations  under
either Section 12(b), 12 (g) or 15(d) of the Securities Exchange Act of 1934, as
amended  (the  "Exchange  Act").  The Company has  registered  its Common  Stock
pursuant to Section 12 of the  Exchange  Act and the Common  Stock is listed and
trades on the Nasdaq National Small Cap Market.

            The Company has filed all material  required to be filed pursuant to
all reporting  obligations,  under either Section 13(a) or 15(d) of the Exchange
Act for a period of at least twelve (12) months immediately  preceding the offer
to sale of the Shares (or for such  shorter  period  that the  Company  has been
required to file such material).

            3.6   SEC Filings/Full Disclosure. Since completion of the Company's
initial  public  offering in July 1996,  none of the Company's  filings with the
Securities and Exchange  Commission  contain any untrue  statement of a material
fact or omit to state  any  material  fact  required  to be  stated  therein  or
necessary to make the  statements  therein in light of the  circumstances  under
which they were made, not misleading. The Company has timely filed all requisite
forms, reports and exhibits thereto with the Securities and Exchange Commission.

            There is no fact known to the Company  (other than general  economic
conditions known to the public generally) that has not been disclosed in writing
to the  Purchasers  which (i) could  reasonably  be  expected to have a material
adverse effect on the business or financial  condition,  properties or assets of
the Company,  or (ii) could  reasonably be expected to materially  and adversely
affect the ability of the Company to perform  its  obligations  pursuant to this
Agreement.

            3.7   Absence  of  Undisclosed  Liabilities.   The  Company  has  no
material liabilities or obligations,  absolute or contingent (individually or in
the aggregate),  except as set forth in the financial  statements or as incurred
in the ordinary course of business after the date of the financial statements.

            3.8   Governmental   Consent,   etc.   No   consent,   approval   or
authorization  of or  designation,  declaration or filing with any  governmental
authority  on the part of the Company is required in  connection  with the valid
execution and delivery of this Agreement,  or the offer, sale or issuance of the
Shares, or the consummation of any other transaction contemplated hereby, except
the filing with the SEC of a registration


                                       4
<PAGE>



statement  on Form S-3 for the  purpose of  registering  the  Conversion  Shares
underlying the Convertible Preferred Stock.

            3.9   Intellectual  Property Rights. Except as disclosed in the Form
10-KSB, Form 10-QSBs and Form 8-Ks filed by the Company for a period of at least
twelve (12) months immediately preceding this offer (the "Reports"), the Company
has sufficient trademarks,  trade names, patent rights,  copyrights and licenses
to conduct its business as presently  conducted in the Reports. To the Company's
knowledge,  neither the Company nor its products is  infringing or will infringe
any trademark,  trade name, patent right,  copyright,  license,  trade secret or
other  similar  right of others  currently in  existence;  and there is no claim
being made against the Company  regarding  any  trademark,  trade name,  patent,
copyright,  license,  trade secret or other  intellectual  property  right which
could have a material  adverse effect on the business or financial  condition of
the Company.

            3.10  Material  Contracts.  Except as set forth in the Reports,  the
agreements  to which the Company is a party  described  in the Reports are valid
agreements,  in full force and effect the Company is not in  material  breach or
material default under any of such agreements.

            3.11  Litigation.  Except as disclosed  in the Reports,  there is no
action,  proceeding or  investigation  pending,  or to the  Company's  knowledge
threatened,  against the Company which might result,  either  individually or in
the  aggregate,  in any  material  adverse  change in the  business,  prospects,
conditions,  affairs or operations of the Company. The Company is not a party to
or subject to the provisions of any order, writ, injunction,  judgment or decree
of any court or government agency or instrumentality.

            3.12  Title to  Assets.  Except  as set  forth in the  Reports,  the
Company has good and  marketable  title to all  properties  and material  assets
described  in the Reports as owned by it,  free and clear of any  pledge,  lien,
security interest,  encumbrance,  claim or equitable interest other than such as
are not material to the business of the Company.

            3.13  Subsidiaries.  Except as disclosed in the Reports, the Company
does not presently own or control,  directly or indirectly,  any interest in any
other corporation, partnership, association or other business entity.

            3.14  Required Governmental Permits. The Company is in possession of
and operating in compliance  with all  authorizations,  licenses,  certificates,
consents,   orders  and  permits  from  state,   federal  and  other  regulatory
authorities which are material to the conduct of its business,  all of which are
valid and in full force and effect.

            3.15  Listing.  The Company will  maintain the listing of its Common
Stock on the Nasdaq National Small Cap Market or other  organized  United States
market or Quotation system.

            3.16  Other  Outstanding  Securities/Financing  Restrictions.  Other
than warrants and options to acquire  shares of Common Stock as disclosed in the
Reports,  there are no other  outstanding  securities  debt or equity  presently
convertible  into  Common  Stock.  Other than as set forth in the  Reports,  the
Company has no  outstanding  restricted  shares,  or shares of Common Stock sold
under  Regulation S, Regulation D or outstanding  under any other exemption from
registration,  which are available  for sale as  unrestricted  ("free  trading")
stock.


                                       5
<PAGE>



            3.17  Legal Opinion.  Purchasers shall, upon purchase of the Shares,
receive  an  opinion  letter  from  counsel  to the  Company,  and  the  Company
represents that it will  immediately  obtain such an opinion from counsel to the
satisfaction of the Transfer Agent, to the effect that:

                  (i)   The Company is incorporated  and validly existing in the
jurisdiction of its incorporation.  The Company and/or its subsidiaries are duly
qualified to do business as a foreign corporation and is in good standing in all
jurisdictions  where the Company and/or  subsidiaries owns or leases properties,
maintains employees or conducts business,  except for jurisdictions in which the
failure to so qualify would not have a material  adverse  effect on the Company,
and has all requisite  corporate  power and authority to own its  properties and
conducts its business.

                  (ii)  There is no action, proceeding or investigation pending,
or to such  counsel's  knowledge,  threatened  against the  Company  which might
result, either individually or in the aggregate,  in any material adverse change
in the business or financial condition of the Company.

                  (iii) To counsel's knowledge, the Company is not a party to or
subject to the provisions of any order, writ, injunction,  judgment or decree of
any court or government agency or instrumentality.

                  (iv)  To  counsel's  knowledge,  there  is  no  action,  suit,
proceeding or investigation by the Company currently pending.

                  (v)   The Common Shares and the Convertible  Preferred  Stock,
which shall be issued at the Closing,  are duly  authorized  and validly  issued
under the Company's Certificate of Incorporation.

                  (vi)  This  Purchase  Agreement,  the  issuance  of the Common
Shares, the Convertible Preferred Stock and the Conversion Shares have been duly
approved by all required  corporate  action and that all such  securities,  upon
delivery, shall be validly issued and outstanding, fully paid and nonassessable.

                  (vii) The   issuance  of  the  Shares  will  not  violate  the
applicable listing agreement between the Company and any securities  exchange or
market on which the Company's securities are listed.

                  (viii)Assuming   the  accuracy  of  the   representation   and
warranties  of the  Company  and the  Purchasers  set  forth  in  this  Purchase
Agreement,  the offer,  issuance and sale of the Common Shares,  the Convertible
Preferred  Stock  and the  Conversion  Shares  to be  issued  to the  Purchasers
pursuant  to  this  Purchase   Agreement,   are  exempt  from  the  registration
requirements of the Securities Act.

            3.18  Use of Proceeds.  The Company represents that the net proceeds
from this offering will be used for general corporate purposes.

            3.19  Dilution.   The  Company  is  aware  and   acknowledges   that
conversion of the  Convertible  Preferred Stock could cause dilution to existing
shareholders and could  significantly  increase the outstanding number of shares
of Common Stock.

            Section  4.   Representations,   Warranties  and  Covenants  of  the
Purchasers . Each Purchaser  represents and warrants to, and covenants with, the
Company that the  following are true and correct as of the date hereof and as of
the Closing Date.


                                       6
<PAGE>



            4.1   Authority.  The  Purchaser's  signatory has all right,  power,
authority  and capacity to execute and deliver this  Agreement and to consummate
the transactions  contemplated hereby. This Agreement has been duly executed and
delivered by the  Purchaser  and will  constitute  the legal,  valid and binding
obligations of the Purchaser,  enforceable in accordance with its terms, subject
to laws of general application relating to bankruptcy, insolvency and the relief
of debtors and rules of law governing specific performance, injunctive relief or
other equitable remedies,  and to limitations of public policy as they may apply
to the indemnification provisions set forth in Section 7.3 of this Agreement.

            4.2   Investment  Experience.  Purchaser is an "accredited investor"
as defined in Rule 501(a) under the  Securities  Act.  Purchaser is aware of the
Company's  business  and  financial  condition  and  has had  access  to and has
acquired  sufficient  information about the Company,  including the Reports,  to
reach an informed and  knowledgeable  decision to acquire the Shares.  Purchaser
has  such  business  and  financial  experience  as is  required  to give it the
capacity to protect its own  interests  in  connection  with the purchase of the
Shares.  Purchaser  has the  ability to bear the  economic  risk of  Purchaser's
investment pursuant to this Purchase Agreement. Purchaser has not been organized
for the  purpose of  investing  in  securities  of the  Company,  although  such
investment is consistent with Purchaser's purpose.

            4.3   Investment Intent.  Without limiting its ability to resell the
Shares  and  the  Conversion  Shares  pursuant  to  an  effective   registration
statement,  Purchaser  represents  that it is purchasing  the Shares for its own
account as principal for investment  purposes.  Purchaser  understands  that its
acquisition  of the Shares has not been  registered  under the Securities Act or
registered or qualified  under any State  securities law in reliance on specific
exemptions therefrom,  which exemptions may depend upon, among other things, the
bona fide nature of Purchaser's investment intent as expressed herein. Purchaser
will not, directly or indirectly, offer, sell, pledge, transfer,  hypothecate or
otherwise  dispose of (or  solicit  any offers to buy,  purchaser  or  otherwise
acquire  or take a pledge of) any of the Shares  except in  compliance  with the
Securities  Act and any  applicable  state  securities  laws,  and the rules and
regulations promulgated thereunder.

            4.4   Registration  or  Exemption  Requirements.  Purchaser  further
acknowledges and understands  that the Shares may not be transferred,  resold or
otherwise  disposed of except in a transaction  registered  under the Securities
Act and any applicable  State  securities  laws or unless an exemption from such
registration  is  available.   Purchaser  understands  that  the  certificate(s)
evidencing  the  Shares  will be  imprinted  with a legend  that  prohibits  the
transfer of the Shares unless (i) they are  registered or such  registration  is
not  required,  and  (ii) if the  transfer  is  pursuant  to an  exemption  from
registration  other than Rule 144 under the  Securities  Act and, if the Company
shall so request in writing,  an opinion of counsel  reasonably  satisfactory to
the Company is obtained to the effect that the transaction is so exempt.

            4.5   No Legal, Tax or Investment Advice. Purchaser understands that
nothing in this  Agreement  or any other  materials  presented  to  Purchaser in
connection with the purchase and sale of the Shares  constitutes  legal,  tax or
investment advice.  Purchaser has relied on, and has consulted with, such legal,
tax and investment advisors as it, in its sole discretion,  has deemed necessary
or appropriate in connection with its purchase of the Shares.

            4.6   Purchaser  Review.  Purchaser  hereby  represents and warrants
that  the  Purchaser  has  carefully  examined  the  Reports  and the  financial
statements  contained therein.  The Purchaser  acknowledges that the Company has
made  available to the  Purchaser  all  documents  and  information  that it has
requested  relating  to the  Company  and  has  provided  answers  to all of its
questions concerning the Company and the Shares.


                                       7
<PAGE>



Nothing stated in the previous two sentences, however, shall be deemed to affect
the representations and warranties of the Company contained in this Agreement.

            4.7   Restrictions  on  Conversion  of Shares.  The Purchaser or any
subsequent  holder  of the  shares  (the  "Holder")  shall  be  prohibited  from
converting any portion of the Convertible  Preferred Stock which would result in
the  Purchaser or the Holder being deemed the  beneficial  owner,  in accordance
with the  provisions  of Rule 13d-3 of the Exchange Act, of 4.99% or more of the
then issued and outstanding Common Stock of the Company.

            Section 5. Conditions to the Purchaser's Obligation to Purchase. The
Company  understands that each Purchaser's  obligation to purchase the Shares is
conditioned upon:

            (a)   Acceptance by Purchaser of this  Agreement for the purchase of
the Shares,  as evidenced by the  execution of this  Agreement by an  authorized
officer;

            (b)   Delivery of the Shares into Escrow;

            (c)   Execution and delivery by the Company of the Escrow  Agreement
and the Registration Rights Agreement in the form of Attachment I and Attachment
11;

            (d)   Delivery of a filed Certificate of Designation; and

            (e)   Delivery of an Opinion of Counsel as per Section 3.17 herein.

            Section 6.  Conditions to Company's  Obligation to Sell.  Purchasers
understand that the Company's obligation to sell the Shares is conditioned upon:

            (a)   The receipt and  acceptance  by the Company of this  Agreement
for  all of the  Shares  as  evidenced  by  execution  of this  Agreement  by an
authorized officer.

            (b)   Delivery into escrow by Purchasers of good funds as payment in
full for the purchase of the Shares; and

            (c)   Execution  and  delivery  by  the  Purchasers  of  the  Escrow
Agreement and the Registration Rights Agreement in the forms of Attachment I and
Attachment II.

            Section 7. Compliance with the Securities Act.

            7.1   Registration  Rights Agreement.  The parties will enter into a
Registration Rights Agreement, annexed hereto as Attachment II.

            7.2   Underwriter.  The  Company  understands  that  the  Purchasers
disclaim  being an  "underwriter"  (as such term is defined under the Securities
Act and the rules and regulations  promulgated  thereunder (an  "Underwriter")),
but Purchasers being deemed an Underwriter  shall not relieve the Company of any
obligation it has hereunder, except as may be required by law.




                                       8
<PAGE>





            7.3   Indemnification.  Each of the Company and the Purchasers agree
to indemnify  the other and to hold the other  harmless from and against any and
all losses,  damages,  liabilities,  costs and  expenses  (including  reasonable
attorneys'  fees)  which the other may sustain or incur in  connection  with the
breach by the  indemnifying  party of any  representation,  warranty or covenant
made by it in this Agreement.

            7.4   Information  Available.  So long as any registration statement
is effective covering the resale of the Common Shares and the Conversion Shares,
the Company will furnish to Purchasers :

            (a)   as soon as possible  after  available  (but in the case of the
Company's Annual Report to  Stockholders,  within 150 days after the end of each
fiscal year of the Company),  one copy of (i) its Annual Report to  Stockholders
(which Annual report shall contain  financial  statements  audited in accordance
with generally accepted accounting principles in the United States of America by
a national  firm of certified  public  accountants);  (ii) each of its Quarterly
Reports to Stockholders,  and its Quarterly Reports on Form 10-QSB;  and (iii) a
full copy of the  registration  statement  covering the  Conversion  Shares (the
foregoing, in each case, including exhibits); and

            (b)   upon  the  reasonable  request  of  Purchasers  ,  such  other
information that is generally available to the public.

            7.5   Temporary  Cessation  of Offers and Sales by  Purchasers . The
Purchasers acknowledge that there may occasionally be times when the Company may
be  required  to  suspend  the  use  of  the  prospectus  forming  part  of  the
Registration  Statement  until  such time as an  amendment  to the  Registration
Statement  has  been  filed  by  the  Company  and  declared  effective  by  the
Commission,  until the prospectus is  supplemented or amended to comply with the
Securities  Act,  or until  such time as the  Company  has filed an  appropriate
report with the  Commission  pursuant to the Exchange Act. The Company agrees to
file any necessary  amendments,  supplements  and reports as soon as practicable
under the  circumstances.  Purchasers  hereby covenant that it will not sell any
Common  Stock  pursuant to said  prospectus  during a period of not more than 45
days commencing at the time at which the Company gives the Purchasers  notice of
the suspension of the use of said  prospectus and ending at the time the Company
gives the Purchasers  notice that the  Purchasers  may  thereafter  effect sales
pursuant to said prospectus, as the same may have been supplemented or amended.

            7.6   Transfer of Common Stock After Registration. Purchasers hereby
covenant with the Company not to make any sale of the Common Stock except either
(i) in accordance  with the  Registration  Statement,  in which case  Purchasers
covenant to comply with the requirement of delivering a current  prospectus,  or
(ii) such time as all of the Common Stock may be sold in any three-month  period
pursuant to Rule 144 under the Securities Act.

            7.7   Termination  of  Obligations.  The  obligations of the Company
pursuant to the Registration Rights Agreement shall cease and terminate upon the
earlier to occur of (i) such time as,  all of the  Conversion  Shares  have been
sold by  Purchasers , or (ii) such time as all of the  Conversion  Shares may be
sold in any three month period pursuant to Rule 144 under the Securities Act.

            7.8   Legend.  The  certificate  or  certificates  representing  the
Shares and, upon conversion,  the Conversion Shares shall be subject to a legend
restricting  transfer  under  the  Securities  Act of 1933,  such  legend  to be
substantially as follows:


                                       9
<PAGE>



"THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933,  AS AMENDED (THE "ACT").  THESE  SECURITIES  HAVE BEEN ACQUIRED FOR
INVESTMENT,  AND MAY NOT BE TRANSFERRED OR DISPOSED OF UNLESS (1) A REGISTRATION
STATEMENT  UNDER THE ACT IS THEN IN EFFECT WITH RESPECT THERETO AND SUCH SALE IS
MADE  PURSUANT TO SUCH  REGISTRATION  STATEMENT  OR (2) A WRITTEN  OPINION  FROM
COUNSEL  REASONABLY  SATISFACTORY  TO THE COMPANY IS OBTAINED TO THE EFFECT THAT
SUCH  TRANSFER  OR  DISPOSITION  WILL  NOT  VIOLATE  THE ACT AND THE  RULES  AND
REGULATIONS PROMULGATED THEREUNDER."

            Such  securities  shall also  include  any  legends  required by any
applicable state securities laws.

            With respect to the Shares and the Conversion  Shares, the legend(s)
shall be removed and the Company shall issue a replacement  certificate  without
such legend to the holder of such  certificate  if such  holder  provides to the
Company an  opinion of counsel  reasonably  acceptable  to the  Company,  to the
effect  that a sale,  transfer  or  assignment  of such  securities  may be made
without registration.

            7.10  Permissive Redemption. The Company has the right to redeem the
Convertible Preferred Stock, in whole or in part, in cash or in Common Stock, as
follows:

            When a conversion request is submitted and when the Conversion Price
is below  $3.40,  the  Company  has the option to redeem all or a portion of the
outstanding  Convertible  Preferred Stock for a redemption  price equal to $3.40
multiplied by the number of shares the Convertible Preferred Stock would convert
into on the date of redemption (the "Redemption Price").

            The Company shall give written  notice by telecopy to the Purchasers
of its election to redeem the  Convertible  Preferred Stock one (1) business day
after  receipt of the Notice of  Conversion.  Upon notice of its right to redeem
the Convertible  Preferred Stock the Company shall wire transfer the appropriate
amount of funds which shall include  Redemption Price, as defined in Certificate
of  Designation  filed May 15, 1998,  and any and all penalties  and  liquidated
damages,  if any,  to  Purchasers  within ten (10) days of such  notice.  If the
Company  does not wire the  appropriate  amounts  of funds to  Purchasers  , the
Company shall pay to the  Purchasers a penalty in an amount in cash equal to two
(2%)  percent of the  Redemption  Price to be paid for such  redemption.  If the
Company fails to pay the Redemption  Price on the Redemption Date, as defined in
the Certificate of Designation filed May 15, 1998, the Purchasers shall have the
right to convert the  Convertible  Preferred Stock  previously  presented to the
Company  and not  redeemed.  The  Company  shall  have the right to  redeem  the
Convertible  Preferred  Stock in accordance  with the terms of this paragraph in
any subsequent redemption;  provided,  however, that if the Company fails to pay
the  Redemption  Price in a  subsequent  redemption  within ten (10)  days,  the
Company  shall  have  the  right  to  redeem  the  Convertible  Preferred  Stock
thereafter,  only upon wiring the Redemption Price to the holders simultaneously
with sending the notice of  redemption.  On or after the  Redemption  Date,  the
holders of Convertible Preferred Stock called for redemption shall surrender the
certificates  evidencing  the shares called for redemption to the Company at the
place  designated  in such  notice and shall  thereupon  be  entitled to receive
payment of the Redemption Price.

            Section 8. Legal Fees and  Expenses.  Each of the parties  shall pay
its own fees and expenses  (including  the fees of any  attorneys,  accountants,
appraisers or others  engaged by such party) in connection  with this  Agreement
and the transactions contemplated hereby.




                                       10
<PAGE>



            Section 9. Conversion. Conversion of the Convertible Preferred Stock
may be made at the Conversion Price as follows:

            No shares  of Series C  Preferred  Stock may be  converted  prior to
August 15, 1998. At any time after August 15, 1998 through November 14, 1998, up
to twenty-five  (25%) percent of the shares of Convertible  Preferred Stock then
outstanding  may  be  converted,  at the  option  of the  holders  thereof,  and
thereafter  on  November  15,  1998,  February  15,  1999 and May 15,  1999,  an
additional  twenty-five  (25%)  percent of the shares of  Convertible  Preferred
Stock then outstanding may be converted,  on a cumulative and pro rata basis, at
the  option of the  holders  thereof.  The  number  of shares of fully  paid and
nonassessable Common Stock into which each share of Convertible  Preferred Stock
may be converted shall be determined by dividing the  Liquidation  Preference by
the Conversion Price in effect on the Conversion Date.

            9.1   Notice of Conversion.  Purchasers may convert,  in whole or in
part,  the  Convertible  Preferred  Stock into Common  Stock by  telecopying  an
executed and  completed  Notice of  Conversion  (in the form  annexed  hereto as
Exhibit A) to the Company and delivering  the original  Notice of Conversion and
the certificate  representing the Convertible  Preferred Stock to the Company by
express courier within five (5) business days of exercise.  Each date on which a
Notice of  Conversion is telecopied to and received by the Company in accordance
with the provisions  hereof shall be deemed a Conversion  Date. The Company will
transmit the certificates representing the Common Stock issuable upon conversion
of all or any  part  of the  Convertible  Preferred  Stock  (together  with  the
certificates  representing  portions of the  Convertible  Preferred Stock not so
converted) to the Purchasers  via express  courier within five (5) business days
after the Company has  received  the original  Notice of  Conversion  and shares
certificate  being so  converted.  The  Notice  of  Conversion  and  certificate
representing  the portion of the Convertible  Preferred Stock converted shall be
delivered as follows and become  effective  upon delivery to each of the persons
below:

            To the Company:

            Xybernaut Corporation

            12701 Four Lakes Circle

            Fairfax, VA 22033

            Attn:     Edward G. Newman, President

            (Tele) (703) 631-6925

            (Fax) (703) 631-7070



            with copies to:



            Xybernaut Corporation

         

                                       11
<PAGE>





            12701 Four Lakes Circle
 
            Fairfax, VA 22033
 
            Attn:     John Moynahan, Treasurer
 
            (tele) (703) 631-6925
 
            (fax) (703) 631-3903
 
 
 
            Steven A. Newman
 
            303 Avenida Cerritos
 
            Newport Beach, CA 92660
 
            (tele) (714) 760-5470
 
            (fax) (714) 760-3865
 
 
 
            Martin Eric Weisberg, Esq.
 
            Parker Chapin Flattau & Klimpl, LLP
 
            1211 Avenue of the Americas
 
            New York, NY 10019
 
            (tele) (212) 704-6000
 
            (fax) (212) 704-6288
 
 
 
            Christopher Auguste, Esq.
 
            Parker Chapin Flattau & Klimpl, LLP
 
            1211 Avenue of the Americas
 
            New York, NY 10019
 
            (tele) (212) 704-6000

 

                                       12
<PAGE>





            (fax) (212) 704-6288

or to such other  person at such other place as the Company  shall  designate to
the Purchasers in writing.

            In the event that the  Convertible  Preferred Stock is not converted
within ten (10)  business  days of receipt by the  Company of a valid  Notice of
Conversion and certificates  representing the Convertible  Preferred Stock to be
converted  (such date of receipt  referred  to as the  "Conversion  Date"),  the
Company shall pay to the  Purchasers , by wire transfer,  as liquidated  damages
for such  failure  and not as a  penalty,  an amount  in cash  equal to one (1%)
percent per day of the purchase price of the  Convertible  Preferred Stock to be
converted which shall run from the initial Conversion Date and Purchaser has the
option to withdraw the Notice of Conversion previously sent; provided,  that the
Company  shall not be  responsible  for (or  required  to pay)  such  liquidated
damages if such failure to convert was not caused by any actions or omissions of
the Company.

            Section 10. [Intentionally blank]

            Section 11.  Notices.  All  notices,  requests,  consents  and other
communications  hereunder  shall be in  writing,  shall be mailed by first class
registered or certified airmail, postage prepaid, and shall be deemed given when
so mailed:

            (a)   if to the Company, to

                  Xybernaut Corporation

                  12701 Four Lakes Circle

                  Fairfax, VA 22033

                  Attn:     Edward G. Newman, President

                  (Tele) (703) 631-6925

                  (Fax) (703) 631-7070



            copy to:



                  Martin Eric Weisberg, Esq.

                  Parker Chapin Flattau & Klimpl, LLP

                  1211 Avenue of the Americas

                  New York, NY 10036


                                       13
<PAGE>



                  (Tele) (212) 704-6050

                  (Fax) (212) 704-6288

or to such other  person at such other place as the Company  shall  designate to
the Purchasers in writing;

            (b)   if to the Purchasers , to

            Libertyview Plus Fund

            c/o Libertyview Capital Management

            101 Hudson Street

            Suite #3700

            Jersey City, New Jersey 07302

            (tele) 201-200-9093

            (fax) 201-200-1140

            copy to:

            Sheldon E. Goldstein, P.C.

            65 Broadway, 10th Fl.

            New York, NY 10006

            Attn:     Sheldon E. Goldstein

            (tele) (212) 809-4220

            (fax) (212) 809-4228

or at such other address or addresses as may have been  furnished to the Company
in writing; or

            (c)   if to any transferee or  transferees  of a Purchaser,  at such
address or addresses as shall have been  furnished to the Company at the time of
the  transfer or  transfers,  or at such other  address or addresses as may have
been furnished by such transferee or transferees to the Company in writing.

            Section 12.  Miscellaneous.

            12.1  Entire Agreement. This Agreement embodies the entire agreement
and understanding  between the parties hereto with respect to the subject matter
hereof and  supersedes all prior oral or written  agreements and  understandings
relating to the subject matter hereof. No statement, representation, warranty,



                                       14
<PAGE>





covenant or  agreement  or any kind not  expressly  set forth in this  Agreement
shall affect, or be used to interpret, change or restrict, the express terms and
provisions of this Agreement.

            12.2  Amendments.  This  Agreement  may not be  modified  or amended
except  pursuant to an  instrument  in writing  signed by the Company and by the
Purchasers.

            12.3  Headings.  The  headings  of  the  various  sections  of  this
Agreement have been inserted for  convenience of reference only and shall not be
deemed to be part of this Agreement.

            12.4  Severability.   In  case  any  provision   contained  in  this
Agreement  should be  invalid,  illegal or  unenforceable  in any  respect,  the
validity,  legality and  enforceability  of the remaining  provisions  contained
herein shall not in any way be affected or impaired thereby.

            12.5  Governing  Law/Jurisdiction.  This Agreement will be construed
and  enforced in  accordance  with and  governed by the laws of the State of New
York,  except for matters arising under the Securities Act, without reference to
principles of conflicts of law. Each of the parties consents to the jurisdiction
of the courts of or located in the State of New York,  specifically the Southern
District  of New York  and/or  the  Supreme  Court  of the  State 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  conveniens,  to the bringing of any such  proceeding in such
jurisdictions.  Each party hereby agrees that if another party to this Agreement
obtains a judgment  against it in such a  proceeding,  the party which  obtained
such judgment may enforce same by summary  judgment in the courts of any country
having jurisdiction over the party against whom such judgment was obtained,  and
each party hereby waives any defenses available to it under local law and agrees
to the enforcement of such a judgment.  Each party to this Agreement irrevocably
consents  to the  service of process in any such  proceeding  by the  mailing of
copies thereof by registered or certified mail,  postage prepaid,  to such party
at its address set forth  herein.  Nothing  herein shall affect the right of any
party to serve process in any other manner permitted by law.

            12.6  Certificate of Designation.  In the event of any inconsistency
or conflict between the terms and provisions of this Agreement and the terms and
provisions of the  Certificate of  Designation,  the terms and provisions of the
Certificate of Designation shall control.

            12.7  Recovery of Attorney's Fees.  Should any party bring an action
to enforce  the terms of this  Agreement  then,  if  Purchasers  prevail in such
action  it  should be  entitled  to  recovery  of its  attorney's  fees from the
Company,  and if the  Company  prevails  in such  action it shall be entitled to
recovery of its attorney's fees from the Purchasers .

            12.8  Fees.  Notwithstanding  Section 12.7, the Company acknowledges
that Purchasers shall have no responsibility  for the payment of any of its fees
in connection with this offering.

            12.9  Counterparts/Facsimile.  This Agreement may be executed in two
or more  counterparts,  each of which shall  constitute an original,  but all of
which,  when taken  together,  shall  constitute but one  instrument,  and shall
become  effective when one or more  counterparts  have been signed by each party
hereto and delivered to the other party.  In lieu of the  original,  a facsimile
transmission  or copy of the original  shall be as effective and  enforceable as
the original.

            12.10 Publicity.  The Purchasers  shall not issue any press releases
or  otherwise  make  any  public  statement  with  respect  to the  transactions
contemplated by this Agreement without the prior written consent of the Company,
except as may be required by applicable law or regulation.



                                       15
<PAGE>



            12.11 Survival. The representations and warranties in this Agreement
shall survive Closing.

            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be signed by their duly authorized  representatives the day and year first above
written.

                                               XYBERNAUT CORPORATION



                                               By ____________________________
                                                  Officer



                                               LIBERTYVIEW PLUS FUND, Purchaser



                                               By ____________________________
                                                  Officer



                                               LIBERTYVIEW FUND, LLC, Purchaser



                                               By ____________________________
                                                  Officer



                                               CPR (USA) INC., Purchaser



                                               By ____________________________
                                                  Officer


                                       16
<PAGE>



                                                                       EXHIBIT A

                              NOTICE OF CONVERSION

        (To be Executed by the Registered Holder in order to Convert the

                    5% Series C Convertible Preferred Stock)

            The undersigned  hereby  irrevocably  elects to convert shares of 5%
Convertible Preferred Stock, Certificate No. (the "Preferred Stock") into shares
of common  stock of  Xybernaut  Corporation  (the  "Company")  according  to the
conditions hereof, as of the date written below.

            The undersigned represents and warrants that

            (i)   All  offers  and  sales by the  undersigned  of the  shares of
Common Stock issuable to the undersigned  upon conversion of the Preferred Stock
shall be made in compliance  with  Regulation  D, pursuant to an exemption  from
registration  under the  Securities  Act of 1933,  as amended  (the  "Securities
Act"), or pursuant to registration of the Common Stock under the Act, subject to
any  restrictions  on sale or transfer set forth in the Preferred Stock Purchase
Agreement  between  the  Company  and the  original  holder  of the  Certificate
submitted herewith for conversion.

            (ii)  Upon  conversion  pursuant to this Notice of  Conversion,  the
undersigned  will not own or deemed to  beneficially  own (within the meaning of
the  Securities  Exchange  Act of 1934,  as  amended)  4.99% or more of the then
issued and outstanding shares of the company.




_________________________                            ___________________________
Date of Conversion                                   Applicable Conversion Price



_________________________                            ___________________________
Number of Common Shares upon                         $ Amount of Conversion

Conversion


_________________________                            ___________________________
Signature                                                      Name

Address:                                             Delivery of Shares to:





                                       17




                                                                     Exhibit 5.1

                                            July 15, 1998



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 165,441  shares (the  "Shares") of Common Stock,  par value $.01
per share (the "Common Stock") of the Company.

           Capitalized terms used herein and not defined shall have the meanings
given to them in the Registration Statement.

           In  connection  with the  foregoing,  we have  examined  originals or
copies,  satisfactory to us, of the Company's (i) Certificate of  Incorporation,
(ii) By-laws and (iii) resolutions of the Company's board of directors.  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  issued  pursuant  to  the  terms  and  conditions  of the 5%
Convertible  Preferred Stock and Common Stock Purchase Agreement 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.

                                         Very truly yours,



                                         /s/ Parker Chapin Flattau & Klimpl, LLP
                                         ---------------------------------------
                                         PARKER CHAPIN FLATTAU & KLIMPL, LLP






                                                                    Exhibit 10.1

                          REGISTRATION RIGHTS AGREEMENT

            THIS REGISTRATION RIGHTS AGREEMENT,  dated May 15, 1998, between the
person  and/or  entity  whose name and  address  appears on the  signature  page
attached hereto (individually a "Holder" or collectively with the holders of the
other Securities issued pursuant to a 5% Convertible  Preferred Stock and Common
Stock Purchase Agreement of even date herewith, as defined below, the "Holders")
and Xybernaut Corporation,  a corporation having its principle place of business
at 12701 Four Lakes Circle, Fairfax, VA 22033.

            WHEREAS,  simultaneously  with the  execution  and  delivery of this
Agreement,  the  Holders  are  purchasing  from the  Company,  pursuant  to a 5%
Convertible  Preferred Stock Securities Purchase Agreement dated the date hereof
(the "Agreement"), 110,294 shares of Common Stock, par value $.01 per share (the
"Common  Shares")  at a price of $3.40  per  share,  and 375  shares of Series C
Preferred  Stock of the  Company,  par value  $.01 per share  (the  "Convertible
Preferred  Stock") at a price of $1,000 per share,  each share  convertible into
one share of the  Company's  Common  Stock,  $0.01  par  value  per  share  (the
"Conversion  Shares" , and,  collectively with the Common Shares, the "Shares"),
for an aggregate purchase price of $750,000; and

            WHEREAS,   the   Company   desires  to  grant  to  the  Holders  the
registration rights set forth herein with respect to the Shares.

            NOW, THEREFORE, the parties hereto mutually agree as follows:

            Section  1.  Registrable   Securities.   As  used  herein  the  term
"Registrable Security" means each of the Conversion Shares;  provided,  however,
that with respect to any particular  Registrable  Security,  such security shall
cease to be a Registrable Security when, as of the date of determination, (i) it
has been  effectively  registered  under the  Securities Act of 1933, as amended
(the "Securities Act") and disposed of pursuant thereto, (ii) registration under
the Securities Act is no longer required for the immediate  public  distribution
of such  security  as a result of the  provisions  of Rule 144,  or (iii) it has
ceased to be outstanding. The term "Registrable Securities" means any and/or all
of the  securities  falling  within the foregoing  definition of a  "Registrable
Security."   In  the  event  of  any  merger,   reorganization,   consolidation,
recapitalization  or other change  affecting the Common Stock,  such  adjustment
shall be made in the definition of  "Registrable  Security" as is appropriate in
order to prevent any dilution or enlargement  of the rights granted  pursuant to
this Section 1.

            Section 2.  Restrictions on Transfer.  The Holder  acknowledges  and
understands that unless registered, the Conversion Shares, Common Shares and the
Convertible  Preferred Stock are "restricted  securities" as defined in Rule 144
promulgated  under  the Act.  The  Holder  understands  that no  disposition  or
transfer of the Common Shares,  Conversion  Shares or the Convertible  Preferred
Stock  may be made  by  Holder  in the  absence  of (i) an  opinion  of  counsel
reasonably  satisfactory to the Company that such transfer may be made or (ii) a
registration  statement  under the Securities Act is then in effect with respect
thereto.

            Section 3.  Registration  Rights.  (a) The Company shall prepare and
file a registration statement (the "Registration Statement") with the Securities
and Exchange  Commission  ("SEC"),  on one occasion,  at the sole expense of the
Company  (except as provided in Section 3(c) hereof),  in respect of all holders
of Registrable  Securities,  so as to permit a non-underwritten  public offering
and sale of the Registrable  Securities under the Act. The number of Registrable
Securities  to be registered  shall be one hundred  fifty (150%)  percent of the
number of shares that would be required if all the  Registrable  Securities were
converted  at a  price  of  $3.40  per  share  on  the  effective  date  of  the
Registration Statement.



<PAGE>



            (b)   The  Company  will  maintain  any  Registration  Statement  or
post-effective  amendment  filed under this Section 3 hereof  current  under the
Securities  Act until the  earlier  of (i) the date that all of the  Registrable
Securities have been sold pursuant to the Registration Statement,  (ii) the date
the  holders  thereof  receive  an  opinion  of  counsel  that  the  Registrable
Securities  may be sold  under the  provisions  of Rule 144 or (iii) the  second
anniversary of the effective date of the Registration Statement.

            (c)   All fees,  disbursements and out-of-pocket  expenses and costs
incurred by the Company in  connection  with the  preparation  and filing of any
Registration  Statement under subparagraph 3(a) and in complying with applicable
securities  and Blue Sky laws  (including,  without  limitation,  all attorneys'
fees)  shall  be  borne  by the  Company.  The  Holder  shall  bear  the cost of
underwriting  discounts and commissions,  if any,  applicable to the Registrable
Securities  being  registered  and the fees and  expenses  of its  counsel.  The
Company shall use its best efforts to qualify any of the  securities for sale in
such   states  as  such  Holder   reasonably   designates   and  shall   furnish
indemnification in the manner provided in Section 6 hereof. However, the Company
shall not be required  to qualify in any state  which will  require an escrow or
other restriction relating to the Company and/or the sellers. The Company at its
expense will supply the Holder with copies of such  Registration  Statement  and
the prospectus or offering circular included therein and other related documents
in such quantities as may be reasonably requested by the Holder.

            (d)   The Company shall not be required by this Section 3 to include
a Holder's Registrable  Securities in any Registration  Statement which is to be
filed if, in the opinion of counsel for the  Company  the  proposed  offering or
other  transfer  as to which  such  registration  is  requested  is exempt  from
applicable  federal and state securities laws and would result in all purchasers
or transferees  obtaining securities which are not "restricted  securities",  as
defined in Rule 144 under the Securities Act.

            (e)   In the event  the  Registration  Statement  to be filed by the
Company  pursuant to Section 3 (a) above is not  declared  effective  by the SEC
within ninety (90) days of the Closing Date, as defined in the Agreement,  then,
unless waived by Holder,  the Company will pay Holder, as liquidated damages for
such failure and not as a penalty, two (2%) percent of the outstanding principal
amount of the  Preferred  Shares for each  month  thereafter  until the  Company
procures registration of the Conversion Shares.

            If the Company does not remit the damages to the Holder as set forth
above,  the  Company  will pay the  Holder's  reasonable  costs  of  collection,
including  attorneys fees, in addition to the liquidated  damages.  Such payment
shall be made to the Holder  immediately if the  registration  of the Conversion
Shares are not effected;  provided, however, that the payment of such liquidated
damages  shall not relieve  the Company  from its  obligations  to register  the
Conversion  Shares pursuant to this Section.  The registration of the Conversion
Shares  pursuant  to this  provision  shall not affect or limit  Holder's  other
rights or remedies as set forth in this Agreement.  Any payment pursuant to this
Section 3(e) shall be made either in cash or paid in additional shares of Common
Stock at the discretion of the Company.

            (f)   No provision  contained herein shall preclude the Company from
selling  securities  pursuant  to any  Registration  Statement  in  which  it is
required to include Registrable Securities pursuant to this Section 3.

            Section 4. Cooperation with Company. Holders will cooperate with the
Company in all respects in connection  with this  Agreement,  including,  timely
supplying all information  reasonably requested by the Company and executing and
returning all documents reasonably requested in connection with the registration
and sale of the Registrable Securities.





                                       2
<PAGE>



            Section 5. Registration  Procedures.  If and whenever the Company is
required by any of the provisions of this  Agreement to effect the  registration
of any of the Registrable Securities under the Act, the Company shall (except as
otherwise provided in this Agreement), as expeditiously as possible:

            (a)   prepare and file with the SEC such  amendments and supplements
to such registration  statement and the prospectus used in connection  therewith
as may be necessary to keep such registration  statement effective and to comply
with the provisions of the Act with respect to the sale or other  disposition of
all securities  covered by such  registration  statement  whenever the Holder or
Holders of such securities shall desire to sell or otherwise dispose of the same
(including  prospectus  supplements with respect to the sales of securities from
time to time in connection with a registration statement pursuant to Rule 415 of
the SEC);

            (b)   furnish  to each  Holder  such  numbers of copies of a summary
prospectus  or other  prospectus,  including  a  preliminary  prospectus  or any
amendment or supplement to any prospectus,  in conformity with the  requirements
of the Act, and such other documents,  as such Holder may reasonably  request in
order to facilitate the public sale or other disposition of the securities owned
by such Holder;

            (c)   use its best  efforts to register  and qualify the  securities
covered by such  registration  statement under such other securities or blue sky
laws of such jurisdictions as the Holder,  shall reasonably request,  and do any
and all other acts and things which may be necessary or advisable to enable each
Holder to consummate the public sale or other  disposition in such  jurisdiction
of the  securities  owned by such Holder,  except that the Company shall not for
any such purpose be required to qualify to do business as a foreign  corporation
in any  jurisdiction  wherein  it is not so  qualified  or to file  therein  any
general consent to service of process;

            (d)   use its best efforts to list such  securities on NASDAQ or any
securities  exchange on which any  securities of the Company is then listed,  if
the  listing  of such  securities  is then  permitted  under  the  rules of such
exchange or NASDAQ;

            (e)   enter into and perform its  obligations  under an underwriting
agreement,  if the offering is an underwritten  offering, in usual and customary
form,  with  the  managing  underwriter  or  underwriters  of such  underwritten
offering;

            (f)   notify each Holder of Registrable  Securities  covered by such
registration  statement,  at any time when a prospectus relating thereto covered
by such registration statement is required to be delivered under the Act, of the
happening  of any  event of  which it has  knowledge  as a result  of which  the
prospectus included in such registration  statement, as then in effect, includes
an  untrue  statement  of a  material  fact or omits to  state a  material  fact
required to be stated  therein or necessary to make the  statements  therein not
misleading in the light of the circumstances then existing.

            Section 6. Indemnification.

            (a)   In the event of the filing of any Registration  Statement with
respect to  Registrable  Securities  pursuant  to Section 3 hereof,  the Company
agrees to  indemnify  and hold  harmless  the  Holder  ("Distributing  Holders")
against any losses,  claims,  damages or  liabilities,  joint or several  (which
shall, for all purposes of this Agreement,  include,  but not be limited to, all
reasonable costs of defense and investigation and all attorneys' fees), to which
the  Distributing  Holders  may  become  subject,  under the  Securities  Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect  thereof) arise out of or are based upon any untrue statement or alleged
untrue  statement  of any  material  fact  contained  in any  such  Registration
Statement,  or any related preliminary  prospectus,  final prospectus,  offering
circular,  notification or amendment or supplement  thereto,  or arise out of or
are based upon the omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein not



                                       3
<PAGE>





misleading;  provided,  however,  that the Company will not be liable (i) in any
such case to the extent that any such loss,  claim,  damage or liability  arises
out of or is based upon an untrue  statement  or  alleged  untrue  statement  or
omission or alleged omission made in such  Registration  Statement,  preliminary
prospectus,  final prospectus,  offering circular,  notification or amendment or
supplement thereto in reliance upon, and in conformity with, written information
furnished to the Company by the  Distributing  Holders,  specifically for use in
the  preparation  thereof,  or (ii) to pay any amounts paid in settlement of any
loss,  claim,  damage or liability if such  settlement  is effected  without the
consent of the  Company.  This  indemnity  agreement  will be in addition to any
liability which the Company may otherwise have.

            (b)   Each  Distributing  Holder  agrees that it will  indemnify and
hold harmless the Company, and each officer, director of the Company against any
losses,  claims,  damages or liabilities  (which shall, for all purposes of this
Agreement,   include,   but  not  be  limited  to,  all  costs  of  defense  and
investigation and all attorneys' fees) to which the Company or any such officer,
or director may become subject under the Securities Act or otherwise, insofar as
such losses  claims,  damages or  liabilities  (or actions in respect  thereof);
arise out of or are based upon any untrue  statement or alleged untrue statement
of any material fact  contained in a  Registration  Statement  requested by such
Distributing  Holder, or any related preliminary  prospectus,  final prospectus,
offering circular, notification or amendment or supplement thereto, or arise out
of or are based upon the  omission  or the alleged  omission to state  therein a
material fact required to be stated  therein or necessary to make the statements
therein  not  misleading,  but in each case only to the extent  that such untrue
statement or alleged untrue  statement or omission or alleged  omission was made
in  such  Registration  Statement,  preliminary  prospectus,  final  prospectus,
offering  circular,  notification or amendment or supplement thereto in reliance
upon, and in conformity with,  written  information  furnished to the Company by
such Distributing  Holder,  specifically for use in the preparation thereof and,
provided further,  that the indemnity  agreement  contained in this Section 6(b)
shall not  inure to the  benefit  of the  Company  with  respect  to any  person
asserting such loss,  claim,  damage or liability who purchased the  Registrable
Securities  which are the subject  thereof if the Company failed to send or give
(in violation of the  Securities  Act or the rules and  regulations  promulgated
thereunder) a copy of the prospectus contained in such Registration Statement to
such person at or prior to the written  confirmation  to such person of the sale
of such Registrable  Securities,  where the Company was obligated to do so under
the Securities Act or the rules and  regulations  promulgated  thereunder.  This
indemnity  agreement will be in addition to any liability which the Distributing
Holders may otherwise have.

            (c)   Promptly  after  receipt by an  indemnified  party  under this
Section 6 of notice of the commencement of any action,  such  indemnified  party
will, if a claim in respect thereof is to be made against the indemnifying party
under this Section 6, notify the indemnifying party of the commencement thereof,
but the  omission  so to notify  the  indemnifying  party will not  relieve  the
indemnifying party from any liability which it may have to any indemnified party
otherwise than as to the  particular  item as to which  indemnification  is then
being  sought  solely  pursuant  to this  Section 6. In case any such  action is
brought against any indemnified party, and it notifies the indemnifying party of
the commencement thereof, the indemnifying party will be entitled to participate
in,  and, to the extent that it may wish,  jointly  with any other  indemnifying
party similarly notified,  assume the defense thereof, subject to the provisions
herein stated and after notice from the  indemnifying  party to such indemnified
party of its election so to assume the defense thereof,  the indemnifying  party
will not be liable to such indemnified  party under this Section 6 for any legal
or  other  reasonable  out-of-pocket  expenses  subsequently  incurred  by  such
indemnified  party in connection  with the defense thereof other than reasonable
costs of  investigation,  unless  the  indemnifying  party  shall not pursue the
action to its final  conclusion.  The indemnified  party shall have the right to
employ  separate  counsel in any such action and to  participate  in the defense
thereof,  but the fees and  reasonable  out-of-pocket  expenses of such  counsel
shall not be at the expense of the indemnifying  party if the indemnifying party
has assumed the defense of the action with counsel  reasonably  satisfactory  to
the  indemnified   party;   provided  that  if  the  indemnified  party  is  the
Distributing  Holder,  the reasonable  fees and  out-of-pocket  expenses of such
counsel shall be at the expense of the indemnifying  party if (i) the employment
of such counsel has been specifically  authorized in writing by the indemnifying
party,  or (ii) the named  parties to any such action  (including  any impleaded
parties) include both



                                       4
<PAGE>



the Distributing  Holder and the indemnifying party and the Distributing  Holder
shall  have been  advised  by such  counsel  that there may be one or more legal
defenses  available to the indemnifying party different from or in conflict with
any legal defenses which may be available to the  Distributing  Holder (in which
case the  indemnifying  party  shall not have the right to assume the defense of
such action on behalf of the Distributing Holder, it being understood,  however,
that the  indemnifying  party shall,  in connection  with any one such action or
separate but  substantially  similar or related actions in the same jurisdiction
arising out of the same general allegations or circumstances, be liable only for
the reasonable fees and out-of-pocket expenses of one separate firm of attorneys
for the  Distributing  Holder,  which firm shall be designated in writing by the
Distributing  Holder).  No settlement of any action against an indemnified party
shall be made without the prior written consent of the indemnified  party, which
consent shall not be unreasonably withheld.

            Section 7.  Notices.  Any notice  pursuant to this  Agreement by the
Company  or by the Holder  shall be in writing  and shall be deemed to have been
duty given if  delivered  by (i) hand,  (ii) by  facsimile  and followed by mail
delivery,  or (iii) if mailed  by  certified  mail,  return  receipt  requested,
postage prepaid, addressed as follows:

            (a)   If to the Holder,  to its, his or her address set forth on the
signature page of this  Agreement,  with a copy to the person  designated in the
Agreement.

            (b)   If to the Company,

                           at  Xybernaut  Corporation,

                           12701 Four Lakes Circle

                           Fairfax,  VA 22033

                           Attn:  Edward G. Newman,  President,

                           (tele) (703) 631-6925

                           (fax) (703)  631-7070

                           and a copy to

                           Parker Chapin Flattau & Klimpl, LLP

                           1211  Avenue of the  Americas

                           New  York,  NY 10036

                           Attn:  Martin  Eric Weisberg,  Esq.

            or to such other  address as any such party may  designate by notice
to the other party. Notices shall be deemed given at the time they are delivered
personally or five (5) days after they are mailed in the manner set forth above.
If notice is  delivered  by  facsimile  to the  Company  and  followed  by mail,
delivery shall be deemed given two (2) days after such facsimile is sent.




                                       5
<PAGE>





            Section 8. Assignment.  This Agreement is binding upon and inures to
the benefit of the parties  hereto and their  respective  heirs,  successors and
permitted assigns. This Agreement cannot be assigned, amended or modified by the
parties  hereto,  except  by  written  agreement  executed  by the  parties.  If
requested  by the  Company,  the Holder  shall have  furnished to the Company an
opinion of counsel reasonably satisfactory to the Company to such effect.

            Section 9. Conflicts.  In the event of any inconsistency or conflict
between the terms and provisions of this Agreement, and the terms and provisions
of the  Purchase  Agreement or the  Certificate  of  Designation,  the terms and
provisions of the Certificate of Designation shall prevail.

            Section  10.   Counterparts.   This  Agreement  may  be  executed  i
counterparts,  each of  which  shall be  deemed  an  original,  but all of which
together shall constitute one and the same instrument.

            Section  11.  Headings.  The  Headings  in  this  Agreement  are for
reference  purposes  only  and  shall  not  affect  in any  way the  meaning  or
interpretation of this Agreement.

            Section 12.  Governing Law; Venue.  This Agreement shall be governed
by and construed in accordance with the laws of the State of New York applicable
to contracts made and to be performed entirely within such State, without regard
to its  principles of conflicts of laws.  Each of the parties hereto agrees that
ion the event of any dispute arising hereunder venue shall be New York, New York
and each party hereby submits to the  jurisdiction  of the United States Federal
Court in the Southern District of New York.

            Section 13.  Severability.  If any provision of this Agreement shall
for  any  reason  be  held  invalid  or   unenforceable,   such   invalidity  or
unenforceability  shall not affect any other provision hereof and this Agreement
shall be construed as if such invalid or unenforceable  provision had never been
contained herein.









                                  [End of Page]

                            [Signature page follows]




                                       6
<PAGE>



            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed, on the day and year first written.



                                              XYBERNAUT CORPORATION





                                              By _____________________________

                                                     Officer





                                              LIBERTYVIEW PLUS FUND, Purchaser





                                              By _____________________________

                                                     Officer



                                              Address: Libertyview Plus Fund

                                              c/o Libertyview Capital Management

                                              101 Hudson Street

                                              Suite #3700

                                              Jersey City, New Jersey 07302

                                              (tele) 201-200-9093

                                              (fax) 201-200-1140








                                       7
<PAGE>



                                              LIBERTYVIEW FUND, LLC, Purchaser





                                              By _____________________________

                                                     Officer





                                              CPR (USA) INC., Purchaser





                                              By _____________________________
                                                     Officer








                                       8



                                Ex. 23.1 - Consent of PricewaterhouseCoopers LLP



                       CONSENT OF INDEPENDENT ACCOUNTANTS

            We consent to the  inclusion in this  registration statement on Form
S-3 of our  report,  which  includes an  explanatory  paragraph  concerning  the
Company's  ability to continue as a going  concern,  dated March 31, 1998 on our
audits of the financial statements of Xybernaut Corporation.  We also consent to
the reference to our firm under the caption "Experts".



                                             /s/ PricewaterhouseCoopers LLP

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

                                             PricewaterhouseCoopers LLP





McLean, VA

July 13, 1998



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