As filed with the Securities and Exchange Commission on May 4, 1999
                              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. [ ]





                         CALCULATION OF REGISTRATION FEE




                                                                   Proposed                Proposed                            
                                                                   Maximum                  Maximum             Amount of
         Title of Each Class              Amount to be          Offering Price             Aggregate           Registration
   of Securities to be Registered        Registered (1)           per Share             Offering Price             Fee
- --------------------------------------------------------------------------------------------------------------------------------
                                                                                                 

Common Stock, $.01 par value per                                                                                               
share................................     4,089,635    (2)         $3.75 (5)           $15,336,131.25          $4,263.44
Common Stock, $.01 par value per                                                                                           
share................................       300,000 (3)(4)         $6.09 (6)               $1,827,000            $507.91
Common Stock, $.01 par value per                                                                                           
share................................       100,000    (3)         $5.50 (6)                 $550,000            $152.90
Common Stock, $.01 par value per                                                                                         
share................................       300,000    (3)         $5.25 (6)               $1,575,000            $437.85
Common Stock, $.01 par value per                                                                                         
share................................       100,000    (3)         $6.00 (6)                 $600,000            $166.80
Common Stock, $.01 par value per                                                                                         
share................................        40,000    (3)         $1.76 (6)                  $70,400             $19.57
- ------------------------------------- --------------------- ----------------------  ----------------------- ------------------
Total Registration Fee.........................................................................................$5,548.47
==============================================================================================================================


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

(2)  Includes  3,649,635  shares of common stock  issuable  upon  conversion  of
     10,000 shares of series D preferred  stock.  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 among Xybernaut  Corporation and the selling stockholders,
     150% of the number of shares  that would be  issuable  upon  conversion  of
     10,000  shares  of the  series D  preferred  stock at a price of $4.11  per
     share,  and is subject to adjustment and could be materially less than such
     estimated  amount  depending  upon  factors  that  cannot be  predicted  by
     Xybernaut at this time, including, among others, the future market price of
     the common stock. If, however,  all 10,000 shares of the series D preferred
     stock currently  outstanding were converted at the closing bid price of the
     common stock as reported by NASDAQ on April 23, 1999,  the Company would be
     obligated  to issue a total of  2,689,076  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 D preferred stock will be converted.

(3)  Pursuant  to Rule 416,  the  shares of common  stock  offered  hereby  also
     include such  presently  indeterminate  number of shares of common stock as
     shall be issued by Xybernaut to the selling  stockholders upon exercise the
     warrants.   That   number  of  shares  is  subject  to   adjustment   under
     anti-dilution provisions included in the warrants. This presentation is not
     intended to  constitute a prediction  as to the future  market price of the
     common  stock or as to the number of shares of common stock  issuable  upon
     exercise of the warrants. See "Risk Factors -- Dilution";  and "Description
     of Securities."

(4)  Pursuant to a registration rights agreement among Xybernaut and the selling
     stockholders,  the number of shares represents 150% of the number of shares
     which would be  issuable  upon  exercise  of  warrants to purchase  200,000
     shares of common stock.

(5)  Estimated  solely  for the  purpose of  calculating  the  registration  fee
     pursuant to Rule 457(c) and (g) of the  Securities  Act of 1933, as amended
     (the "Securities Act"); based on the average ($3.75) of the bid ($3.72) and
     asked ($3.78) price on the Nasdaq SmallCap Market on April 23, 1999.

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

The Registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effective date until the Registrant  shall file
a further amendment which specifically  states that this Registration  Statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities  Act of  1933 or  until  this  Registration  Statement  shall  become
effective on such date as the  Commission,  acting pursuant to Section 8(a), may
determine.





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

                   SUBJECT TO COMPLETION, DATED  MAY __, 1999

PROSPECTUS
                                4,929,635 Shares

                              XYBERNAUT CORPORATION

         The  stockholders  of Xybernaut  Corporation  listed on page 10 of this
prospectus are offering for sale  4,929,635  shares of common stock of Xybernaut
under this prospectus.

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


                    ---------------------------------------
                    |NASDAQ SmallCap Market Symbol: "XYBR"|
                    ---------------------------------------

         On April 23, 1999,  the closing  price of one share of our common stock
on the NASDAQ SmallCap Market was $3.75.

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


         This  investment  involves a high degree of risk. You should  carefully
         consider  the  factors  described  under  the  caption  "risk  factors"
         beginning on page 2 of this prospectus.

         Neither the Securities and Exchange Commission nor any state securities
         commission has approved or disapproved these securities,  or determined
         if this prospectus is truthful or complete.  Any  representation to the
         contrary is a criminal offense.


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


             The date of this prospectus is _________________, 1999


                                 



                                  RISK FACTORS

         Before  you buy shares of our  common  stock,  you should be aware that
there are various risks associated with that purchase, including those described
below.  You should consider  carefully these risk factors,  together with all of
the other  information in this prospectus and the documents we have incorporated
by  reference  in the section  "Where You Can Find More  Information  About Us",
before you decide to purchase shares of our common stock.


            --------------------------------------------------------
            |Risks Associated with Our History of Losses and Future|
            |                  Need for Capital                    |
            --------------------------------------------------------

We have a history and expectation of losses.

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


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

The "going concern"  qualification on the report of our independent  accountants
may reduce our ability to raise additional financing.

         The report of our  independent  accountants  on our  December  31, 1998
consolidated  financial  statements contains an explanatory  paragraph regarding
our ability to  continue as a going  concern and our ability to meet our ongoing
obligations.  Our independent  accountants cited our history of operating losses
and our working capital deficit as factors which raised  substantial doubt as to
our ability to continue as a going concern.  This "going concern"  qualification
may reduce our ability to raise additional financing.

If we do not arrange additional financing, we may be unable to commercialize our
products.

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


                                      - 2 -


            ---------------------------------------------------------
            | Risks Associated with the Industry in Which We Operate |
            ---------------------------------------------------------

Our future revenues and ability to produce new products depend  substantially on
the success of the Mobile Assistant Series(R).

         Our Mobile Assistant(R)  Series currently consists of one product,  the
MA IV. The Mobile Assistant(R) Series is our principal products, and our success
will depend upon its commercial acceptance,  which cannot be assured. Additional
product  development  will result in a significant  increase in our research and
development expenses that may be unrecoverable  should  commercialization of new
products  prove  unsuccessful.  We also  could  require  additional  funding  if
research and development expenses are greater than we anticipate.

We may have to lower prices or spend more money to effectively  compete  against
companies  with greater  resources  than us which could result in lower revenues
and/or profits.

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

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

Currency fluctuations, especially in the Japanese Yen, may significantly
increase our expenses and affect our results of operations.

         The exchange  rates for some local  currencies  in  countries  where we
operate may fluctuate in relation to the U.S. dollar. Such fluctuations may have
an adverse effect on our expenses,  earnings or assets when local currencies are
translated into U.S. dollars.  We are party to a supplier  arrangement with Sony
Digital  Products for the  production of the MA IV system.  The fees we pay Sony
Digital  Products are paid in Japanese  Yen.  Any  weakening of the value of the
U.S.  dollar  against  the  Japanese  Yen  could  result in an  increase  in our
production expenses which, if substantial,  could have a material adverse effect
on our financial condition and results of operations.


                                      - 3 -



          ------------------------------------------------------------
          | Risks Associated with Our Internal Operations and Policies |
          -------------------------------------------------------------
   
We do not intend to declare dividends in the foreseeable future.

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

Year 2000 Issues.

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

         Based on a recent assessment, we determined that we will be required to
modify or replace  portions of our  software so that our  computer  systems will
properly utilize dates beyond December 31, 1999. We believe that we can mitigate
the Year 2000 Issue with  modifications to existing  software and conversions to
new software. However, if we fail to make such modifications and conversions, or
if we do not make them on a timely  basis,  the Year  2000  Issue  could  have a
material impact on our operations.

         We have contacted all of our significant  suppliers and large customers
to determine the possible effect on our operations of their inability or failure
to remediate  their own Year 2000 Issue.  Our estimate of the costs to remediate
our Year 2000 issue is based on presently  available  information.  However,  we
cannot  guarantee that the systems of other  companies on which our systems rely
will be timely converted,  or that a failure to convert by another company, or a
conversion  that is  incompatible  with our  systems,  would  not have  material
adverse effect on our operations.  We have no exposure to contingencies  related
to the Year 2000 Issue for the products we have sold.

         We will utilize both internal and external  resources to reprogram,  or
replace, and test the software for Year 2000 modifications.  We plan to complete
the Year 2000  project  within the next  three  months  and  estimate  the total
remaining cost of the Year 2000 project at $6,000.  Approximately  $1,700 of the
total project cost is attributable to the purchase of new software which will be
capitalized.  The remaining $4,300,  which will be expensed as incurred over the
next six months,  is not  expected  to have a material  effect on our results of
operations.  To date, we have incurred and expensed approximately $1,000 related
to our Year 2000 project.

         Our  estimates  of the date of  completion  and  cost of our Year  2000
project are based on our best  estimates,  which we derived  utilizing  numerous
assumptions  of future events  including the continued  availability  of certain
resources, third party modification plans and other factors. The costs


                                      - 4 -





and completion  date of our Year 2000 project could differ  materially  from our
estimates due to the lack of availability and cost of personnel  trained in this
area, our ability to locate and correct all relevant computer codes, and similar
uncertainties.

          --------------------------------------------------------------
         | Risks Which May Dilute the Value of Your Xybernaut Shares or |
         |            Limit the Effect of Their Voting Power            |
          --------------------------------------------------------------

The price of our common stock is highly volatile.

         The price of our  common  stock is highly  volatile.  During the period
from January 1, 1998 to April 23, 1999 the closing price of our common stock has
ranged from a high of $8.44 to a low of $1.38.  Following  periods of volatility
in  the  market  price  of  a  company's  securities,  securities  class  action
litigation  has  often  been  instituted  against  such a  company.  If  similar
litigation were instituted  against us, it could result in substantial costs and
a diversion of our  management's  attention and  resources,  which could have an
adverse effect on our business.  The volatile  fluctuations  of the market price
are based on (1) the  number of shares in the  market at the time as well as the
number of shares we may be  required  to issue in the  future,  compared  to the
market demand for our shares;  (2) our performance  and meeting  expectations of
our performance, including the development and commercialization of our products
and proposed products; and (3) general economic and market conditions.

The cancellation of shares held in escrow may result in a non-cash
future charge which could reduce or eliminate earnings per share.

         As  a  condition  to  our  initial  public  offering,  certain  of  our
stockholders,  primarily  officers  and  directors,  deposited  an  aggregate of
1,800,000 shares of common stock into an escrow account. The escrowed shares are
subject to release or cancellation on the  satisfaction of specific  performance
guidelines. See "Effects of Possible Non-Cash Future Charge."

         The difference  between the initial offering price and the market value
(at the time of release) of any escrowed shares released will be deemed to be an
additional compensation expense. Such expense, depending on the price per share,
may have the effect of reducing or eliminating  any earnings per share and could
have a negative effect on the market price for our common stock.

Our executive  officers,  directors and principal  stockholders,  together,  
can exercise control over all matters submitted to a vote of stockholders.

         As March 31, 1999,  our  executive  officers,  directors  and principal
stockholders  beneficially  owned, in the aggregate,  approximately 26.9% of our
outstanding shares of common stock. These stockholders, if acting together, will
be  able  to  effectively   control  most  matters  requiring  approval  by  our
stockholders. The voting power of these stockholders under certain circumstances
could  have the  effect  of  delaying  or  preventing  a change  in  control  of
Xybernaut.


                                      - 5 -




We have 9,252,110 shares reserved for future issuances
which can substantially dilute the value of your Xybernaut common stock.

         The issuance of reserved  shares  would  dilute the equity  interest of
existing  stockholders and could have a significant adverse effect on the market
price of our common  stock.  As of April 23, 1999,  we had  9,252,110  shares of
common  stock  reserved  for  possible  future   issuances  upon  conversion  of
outstanding  options and warrants.  Certain options and warrants are convertible
into common stock at discounts  from future  market  prices of the common stock.
Such  discounts  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. See "Dilution."

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

Anti-takeover measures in our certificate of incorporation could adversely
affect the voting power of the holders of the common stock.

         Our Certificate of Incorporation authorizes anti-takeover measures like
the authority to issue "blank check"  preferred stock and the staggered Board of
Directors.  Those  measures  could have the  effect of  delaying,  deterring  or
preventing  a change in  control  without  any  action by the  shareholders.  In
addition,  issuance of preferred stock,  without shareholder  approval,  on 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."

                INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

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

                  WHERE YOU CAN FIND MORE INFORMATION ABOUT US

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

         We have  filed  with the SEC a  registration  statement  on Form S-3 to
register the shares being offered.  This prospectus is part of that registration
statement and, as permitted by the SEC's rules, does

                                      - 6 -



not contain all the  information  included in the  registration  statement.  For
further information with respect to us and our common stock, you should refer to
the  registration  statement and to the exhibits and schedules  filed as part of
the registration statement, as well as the documents discussed below.

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

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

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

          o    Annual  Report on Form 10-KSB for the fiscal year ended  December
               31, 1998; and

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

         You may request a copy of these  filings,  at no cost, by writing to us
at 12701 Fair Lakes Circle, Fairfax, Virginia 22033, (703) 631-6925.  Attention:
W. Jeff Pagano.

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

                                 USE OF PROCEEDS

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

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

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


                                      - 7 -


                                    DILUTION

         As of April 23, 1999, we had issued and outstanding  22,229,747  shares
of common  stock.  At that date,  there were an additional  9,252,110  shares of
common stock reserved for possible future issuances as follows:

         o     options to purchase 1,942,300 shares at an exercise price between
               $1.37 and $7.31 per share.  The shares  underlying  these options
               have not been  registered  under the  Securities  Act and will be
               deemed "restricted securities" when issued;

         o     warrants to purchase  1,127,750  shares at an price between $1.76
               and  $18.00  per  share.  We have  registered  a total of 797,500
               shares issuable upon exercise of these  warrants.  The balance of
               330,000 will be deemed to be "restricted securities" when issued;

         o     warrants to purchase  5,762,060  shares at an effective  exercise
               price  of  $6.01  per  share.  All of the  shares  issuable  upon
               exercise  of  these  warrants  have  been  registered  under  the
               Securities Act; and

         o     420,000 shares  issuable upon  conversion of 210,000 units.  Each
               unit  consists  of one share of common  stock and one  redeemable
               warrant  to  purchase  one share of common  stock,  at a price of
               $9.075 per unit. The unit is exercisable  during a period of four
               years commencing July 18, 1996. The redeemable  warrants included
               in the  units  are  exercisable  at  $12.60  per  share.  We have
               registered  the shares  issuable upon exercise of the units under
               the Securities Act.

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

         The shares  which will be deemed  "restricted  securities"  may be sold
under Rule 144. Rule 144 permits sales of "restricted securities" by any person,
whether or not an affiliate of the issuer,  after one year. At that time,  sales
can be made  subject to the Rule's  volume and other  limitations  and after two
years  by  non-affiliates  without  adhering  to  Rule  144's  volume  or  other
limitations. In general, an "affiliate" is a person with the power to manage and
direct our policies. The SEC has stated that, generally,  executive officers and
directors of an entity are deemed affiliates of the issuing entity.

         Following this offering,  assuming the selling stockholders exercise or
convert  all  of  their  warrants  and  convertible  securities,  we  will  have
26,719,382 shares of common stock  outstanding.  Of those shares,  approximately
25,700,942 will be freely transferable  without restriction under the Securities
Act.

                                      - 8 -



                    EFFECT OF POSSIBLE NON-CASH FUTURE CHARGE

         As  a  condition  to  our  initial  public  offering,  certain  of  our
stockholders,  primarily  officers  and  directors,  deposited  an  aggregate of
1,800,000 shares of common stock into an escrow account. The Escrowed Shares are
subject to the following terms and conditions:

         o     The  Escrowed  Shares  will  be  released  incrementally  over  a
               three-year  period  only in the  event  our  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.

         o     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  agreed  upon  price  levels,  certain  amounts  of the
               Escrowed  Shares  will be  returned  to us for  each  period  and
               canceled.

         o     All the 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.

         The difference  between the initial offering price and the market value
(at the time of release) of any Escrowed Shares released will be deemed to be an
additional compensation expense. Such expense, depending on the price per share,
may have the effect of reducing or eliminating  any earnings per share and could
have a negative effect on the market price for our common stock.

         We did not meet the targets for escrow  release for  September 30, 1997
and September 30, 1998. As a result,  300,000 and 750,000 shares,  respectively,
were canceled from the escrow pool  resulting in a reduction of 2.1% and 3.6% of
our outstanding shares of common stock.


                                      - 9 -



                              SELLING STOCKHOLDERS

         The  following  table lists certain  information  regarding the selling
stockholders'  ownership of shares of our common stock as of April 23, 1999, and
as  adjusted  to reflect  the sale of the  shares.  Information  concerning  the
selling stockholders,  their pledgees, donees and other non-sale transferees who
may become selling stockholders, may change from time to time. To the extent the
selling stockholders or any of their representatives advises us of such changes,
we will report those changes in a prospectus  supplement to the extent required.
See "Plan of Distribution."




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

Austost Anstalt Schaan                         260,000(1)            260,000(1)                  0                  *
Balmore Funds S.A.                             260,000(1)            260,000(1)                  0                  *
Bulk Trade Inc. (BVI)                        1,579,854(2)          1,579,854(2)                  0                  *
Crystalite Investments Ltd.                  2,369,781(3)          2,369,781(3)                  0                  *
Hong Kong Bank of Canada                       440,000               440,000                     0                  *
Settondown Capital  International Ltd.          20,000(4)             20,000(4)                  0                  *

 Total                                       4,929,635             4,929,635                     0                   
                                             =========             =========                     =                  

                                             
- ----------------
* Less than 1%

(1)      Assumes  exercise of warrants to purchase (a) 200,000  shares of common
         stock at an exercise price of $5.25 per share; and (b) 50,000 shares of
         common stock at an exercise price of $6.00 per share.

(2)      Under the terms of a registration  statement  between Xybernaut and the
         selling stockholder,  the number of shares registered for resale by the
         selling stockholder includes 150% of (a) 973,236 shares of common stock
         issuable upon conversion of convertible securities; and (b) warrants to
         purchase 80,000 shares of common stock.

(3)      Under the terms of a registration  statement  between Xybernaut and the
         selling stockholder,  the number of shares registered for resale by the
         selling  stockholder  includes 150% of (a)  2,189,781  shares of common
         stock  issuable upon  conversion  of  convertible  securities;  and (b)
         warrants to purchase 120,000 shares of common stock.

(4)      Assumes  exercise of warrants to purchase 20,000 shares of common stock
         at an exercise price of $1.76.

                                     - 10 -



       

         On April 13, 1998, we entered into a financing  agreement  with Austost
Anstalt Schaan and Balmore Funds S.A. for the sale of $1,000,000 worth of common
stock.  Under  the  terms  of  that  agreement,  we had the  right,  but not the
obligation,  to obtain  up to an  additional  $10,000,000  in a series of equity
drawdowns based on terms and conditions  specified in the agreement.  From April
1998 to January 1999, we exercised  equity drawdowns in the amount of $6,360,000
and issued a total of 2,270,938  shares of common stock.  The agreement has been
terminated.  Settondown Capital  International Ltd. acted as placement agent for
those   transactions.   Wayne   Coleson,   a  director  of  Settondown   Capital
International, Ltd., is a member of our advisory board.

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

                                     - 11 -



                            DESCRIPTION OF SECURITIES

General

         Our authorized  capital stock  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 of this  prospectus,  we have  22,229,747
shares of common stock,  94 shares of series C preferred stock and 10,000 shares
of series D preferred stock issued and outstanding.  We have reserved  9,252,110
shares  of  common  stock for  issuance  pursuant  to  outstanding  options  and
warrants.

Common Stock

         Voting

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

         Dividends

         Holders of common stock are entitled to receive  ratably such dividends
as may be declared by the Board of Directors out of funds legally  available for
that purpose.

         Rights on Liquidation

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

         Pre-emptive or Redemption Rights

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

Preferred Stock

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


                                     - 12 -



         As of the date of this prospectus, we have not designated any shares of
preferred  stock  other than the series A  preferred  stock,  series B preferred
Stock, series C preferred stock and series D preferred stock. There are no other
shares of preferred stock  outstanding,  and we have no plans to issue any other
shares of preferred stock.

Warrants

         Of the total  4,929,635  shares of common stock  registered for sale by
the selling stockholders, 840,000 shares are issuable upon exercise of currently
exercisable  warrants.  The warrants were issued to the selling  stockholders in
connection with various private placements.  The exercise prices and term of the
warrants are as follows:


            Warrants            Exercise Price              Expiration Date
            --------            --------------              ---------------
             300,000                    $ 6.09               March 10, 2002
             100,000                     $5.50             January 31, 2001
             300,000                     $5.25                 July 2, 2001
             100,000                     $6.00             January 31, 2001
              40,000                     $1.76             October 15, 2003

         The  exercise  price and the number of shares for which each warrant is
exercisable is subject to adjustment under anti-dilution  provisions  pertaining
to  the  declaration  of  stock  dividends  and  the  merger,  consolidation  or
liquidation of the Company.

Anti-takeover Considerations.

         Our  Certificate  of  Incorporation  authorizes  the  issuance of up to
6,000,000  shares of $.01 par value preferred  stock.  The issuance of preferred
stock  with  such  rights   could  have  the  effect  of  limiting   stockholder
participation in certain transactions such as mergers or tender offers and could
discourage or prevent a change in our management.  We have no present  intention
to issue any additional preferred stock.

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

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

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


                                     - 13 -





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

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

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

         o        eliminate stockholder action by written consent;

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

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

         Those measures,  combined with the ability of 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 without
any further action by the shareholders.  In addition,  the 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.

Transfer Agent and Registrar

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


                              PLAN OF DISTRIBUTION

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

         o         in the over-the-counter market; or
         o         in privately negotiated transactions

                                     - 14 -



at  prevailing  market  prices at the time of sale,  at prices  related to those
prevailing market prices, at negotiated prices or at fixed prices.

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

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

         o        ordinary brokerage  transactions and transactions in which the
                  broker solicits purchasers;

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

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

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

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

         o        may not engage in any  stabilization  activity  in  connection
                  with our  securities;  o must furnish each broker which offers
                  common  stock  covered by this  prospectus  with the number of
                  copies of this  prospectus  which are required by each broker;
                  and

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

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

                                     - 15 -




                 INDEMNIFICATION FOR SECURITIES ACT LIABILITIES

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

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

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

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

                                     - 16 -


                                  LEGAL MATTERS

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

                                     EXPERTS

        The consolidated financial statements incorporated in this Prospectus by
reference  to the Annual  Report on Form 10-KSB for the year ended  December 31,
1998,  have been so  incorporated  in reliance on the report (which  contains an
explanatory  paragraph  relating to the Company's ability to continue as a going
concern as  described in Note 1 to the  consolidated  financial  statements)  of
PricewaterhouseCoopers  LLP, independent accountants,  given on the authority of
said firm as experts in auditing and accounting.


                                     - 17 -




=====================================     ======================================











       We have not authorized any dealer,
salesperson or any other person to give any                4,929,635
information or to represent anything not            SHARES OF COMMON STOCK
contained in this prospectus.  You must not           
rely on any unauthorized information.  This
prospectus does not offer to sell or buy any
shares in any jurisdiction where it is
unlawful.  The information in this
prospectus is current as of
_________________, 1999.






              -----------------
              TABLE OF CONTENTS

                                     Page

Risk Factors............................2
Where You Can Find More                                  ----------            
        Information About Us............6                PROSPECTUS
Use of Proceeds.........................7                ----------
Dilution................................8                                  
Effects of Possible Non-Cash
        Future Charge...................9
Selling Stockholders ..................10
Description of Securities..............12
Plan of Distribution ..................14      _________________________, 1999
Indemnification for Securities
        Act Liabilities................16
Legal Matters..........................17
Experts ...............................17



=====================================     ======================================





                                     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 Xybernaut 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.....................  $5,554.31
       Legal fees and expenses................................... $35,000.00
       Accounting expenses.......................................  $3,500.00
                                                                   ---------
            Total................................................ $44,054.31
                                                                  ==========

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.

         Xybernaut's  Certificate of Incorporation provides that directors shall
not be personally  liable for monetary  damages to Xybernaut 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 Xybernaut  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.  Xybernaut's  Certificate of
Incorporation also authorizes Xybernaut to indemnify its officers, directors and
other  agents,  by  bylaws,  agreements  or  otherwise,  to the  fullest  extent
permitted under Delaware law. Xybernaut has entered into an


                                      II-1





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 Xybernaut's Certificate of Incorporation
or as otherwise permitted under Delaware law. Each Indemnification Agreement may
require Xybernaut,  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.

         Xybernaut  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

3.1    Certificate of Designation of the Series D Preferred Stock.
4.1    Form of Securities Purchase Agreement used in the March  8, 1999 private
       placement.
4.2    Form of Warrant used in the March 8, 1999 private placement.
4.3    Form of Warrant.
5      Opinion of Parker Chapin Flattau & Klimpl, LLP.
10.1   Form of Registration Rights Agreement used in the March  8,  1999 private
       placement.
10.2   Form of Escrow Agreement used in the March 8, 1999 private placement.
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

                                      II-2



         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;

         (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



                                   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 April 29, 1999.

                              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
       ---------             -----                               ----
                             Chairman of the Board,
                             President and Chief Executive       April 29, 1999
/s/ Edward G. Newman         Officer
- -----------------------
Edward G. Newman


/s/ Kaz Toyosato             Executive Vice President -          April 29, 1999
- -----------------------      Asian Operations and Director     
Kaz Toyosato                 



                                      II-4




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

/s/ Maarten R. Heybroek        Chief Operating Officer and      April 29, 1999
- --------------------------     Chief Financial Officer
Maarten R. Heybroek          


/s/ Martin Eric Weisberg                                        April 29, 1999
- --------------------------
Martin Eric Weisberg           Secretary and Director


/s/ Harry E. Soyster           Director                         April 29, 1999
- --------------------------
Lt. Gen. Harry E. Soyster


/s/ James J. Ralabate          Director                         April 29, 1999
- --------------------------
James J. Ralabate


/s/ Keith P. Hicks             Director                         April 29, 1999
- --------------------------
Keith P. Hicks


/s/ Steven A. Newman           Vice Chairman and                April 29, 1999
- --------------------------     Director
Steven A. Newman               


/s/ Phillip E. Pearce          Director                         April 29, 1999
- --------------------------
Phillip E. Pearce


                               Director                         April 29, 1999
/s/ Eugene J. Amobi
- --------------------------
Eugene J. Amobi

/s/ Edwin Vogt                 Director                         April 29, 1999
- --------------------------
Edwin Vogt


                                      II-5


                                 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)



                                 MAY 4, 1999







                                  EXHIBIT INDEX


                                                                            
EXHIBIT NO.     DESCRIPTION OF DOCUMENT  
- ----------      -----------------------                                      

3.1             Certificate of Designation of the Series D Preferred Stock.
4.1             Securities Purchase Agreement used in the March 8, 1999 private
                placement.                                                  
4.2             Form of Warrant used in the March 8, 1999 private placement.
4.3             Form of Warrant.
5.1             Opinion of Parker Chapin Flattau & Klimpl, LLP.
10.1            Form of Registration Rights Agreement used in the March 8,     
                1999 private placement.                                        
10.2            Form of Escrow Agreement used in the March 8, 1999 private     
                placement.                                                     
23.1            Consent of PricewaterhouseCoopers L.L.P.
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)


                                       E-2