XYBERNAUT CORP
S-3/A, 1999-09-10
COMPUTER COMMUNICATIONS EQUIPMENT
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      As filed with the Securities and Exchange Commission on September 9, 1999
                                                     Registration No. 333-80837
- ------------------------------------------------------------------------------


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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


                                 AMENDMENT NO. 1
                                       TO
                                    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

<TABLE>
<S>                                     <C>                      <C>                    <C>                    <C>

                                                                   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................................        1,266,074  (2)            $3.33   (5)       $4,216,026.42          $1,172.05
Common Stock, $.01 par value per
share................................         75,000 (3)(4)            $4.648  (6)         $348,600                 96.91
Total Registration Fee..........................................................................................$1,268.96 (7)
=====================================
</TABLE>

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

(2)      Includes  1,266,074  shares of common stock issuable upon conversion of
         500  shares of series D  preferred  stock and 2,100  shares of series E
         preferred  stock.  The number of shares of common stock indicated to be
         issuable in connection  with such  transactions  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 500 shares
         of series D preferred  stock and 2,000 shares of the series E preferred
         stock at a price of $4.11 and $2.907 per  share,  respectively,  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 500 shares of the series D preferred
         stock and the 2,100 shares of series E preferred  stock were  converted
         at the closing  bid price of the common  stock as reported by NASDAQ on
         June 7, 1999  ($3.31),  the Company would be obligated to issue a total
         of 785,498 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 and series E  preferred  stock will be  converted.  We are not
         registering  additional  shares of common  stock  which may result from
         price fluctuations and the operation of the conversion  formulas of the
         preferred stock.

(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 covering the
         additional issuance of shares by Xybernaut resulting from stock splits,
         stock  dividends  or  similar  transactions.  We  are  not  registering
         additional   shares  of  common  stock  which  may  result  from  price
         fluctuations  and the  operation of exercise  formulas of the warrants.
         This  presentation is not intended to constitute a prediction as to the
         future  market  price of the common stock or as to the number of shares
         of common  stock  issuable  upon  exercise of the  warrants.  See "Risk
         Factors -- Dilution"; and "Description of Securities."

(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 50,000 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 ($3.33) of the bid
         ($3.31) and asked ($3.34) price on the Nasdaq  SmallCap  Market on June
         7, 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.

(7) Paid with the original filing of the registration statement.

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

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



                 SUBJECT TO COMPLETION, DATED SEPTEMBER 9, 1999

PROSPECTUS
                                1,341,074 Shares

                              XYBERNAUT CORPORATION

         The  stockholders  of Xybernaut  Corporation  listed on page 10 of this
prospectus are offering for sale  1,341,074  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  September  3, 1999,  the  closing  price of one share of our common
stock on the NASDAQ SmallCap Market was $1.406.




         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

<PAGE>

                                  RISK FACTORS

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



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

We have a history of losses and, if we do not achieve profitability,
we may not be able to continue our business in the future.

         Our research, development, 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:
             .  March 31, 1994                                $47,352
             .  March 31, 1995                             $1,303,892
             .  December 31, 1996                          $5,238,536
             .  December 31, 1997                          $9,479,966
             .  December 31, 1998                         $13,111,488

        . Six months ended June 30, 1999                   $9,359,916

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.

We could be required to cut back or stop operations if we are unable to raise or
obtain needed financing.

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

                                      - 2 -

<PAGE>




         Risks Associated with the Industry in Which We Operate

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

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

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 Interactive Solutions, Inc., a subsidiary
of Teltronics,  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 supplier arrangements with several
companies  in  Japan,  including  Shimadeu  and Sony  Digital  Products  for the
production of the MA IV system.  The fees we pay to these  companies are paid in
Japanese  Yen. Any  strengthening  of the value of the U.S.  dollar  against the
Japanese Yen could 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 -

<PAGE>




            Risks Associated with Our Internal Operations and Policies

Since we do not intend to  declare  dividends  in the  foreseeable  future,  the
return on your investment  will depend upon  appreciation of the market price of
your shares.

         We have  never  paid any  dividends  on our  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.
As a result,  the return on your  investment  in Xybernaut  will depend upon any
appreciation  in the market  price of the common  stock.  The  holders of common
stock are entitled to receive dividends when, as and if declared by the board of
directors out of funds legally available for dividend  payments.  The payment of
dividends,  if any,  in the  future is  within  the  discretion  of our board of
directors and will depend upon our earnings,  capital requirements and financial
condition, and other relevant factors.

Our computer systems may not recognize the year 2000 which may
affect our computer systems and disrupt our business

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


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

         As a result of the testing,  we determined that our phone system is not
Year 2000  compliant.  This phone system was already  scheduled for  replacement
during the second half of 1999 to add capacity,  upgrade the  telecommunications
capabilities, and allow for better customer service. Replacement of the existing
phone system with one that provides similar  capabilities and Year 200 compliant
is  estimated  to  cost  between  $50,000  and  $75,000.   We  expect  to  spend
approximately $250,000 for the upgraded phone system. We are currently arranging
for a leasing facility to finance the purchase of the phone system. Our estimate
of the costs to remediate our Year 2000 issue related to our telephone system is
based on presently available information.  Outside of the phone system, the cost
of testing and modifying our computer systems to obtain Year 2000 compliance was
less than $10,000 in the aggregate.


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

                                      - 4 -

<PAGE>



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.

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


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

The price of our common stock is highly volatile.


         The price of our  common  stock is highly  volatile.  During the period
from January 1, 1998 to September 3, 1998 the closing  price of our common stock
has  ranged  from a high  of  $8.50  to a low of  $1.19.  Following  periods  of
volatility  in the market  price of a  company's  securities,  securities  class
action litigation has often been instituted  against such a company.  If similar
litigation were instituted  against us, it could result in substantial costs and
a diversion of our  management's  attention and  resources,  which could have an
adverse effect on our business.  The volatile  fluctuations  of the market price
are based on (1) the  number of shares in the  market at the time as well as the
number of shares we may be  required  to issue in the  future,  compared  to the
market demand for our shares;  (2) our performance  and meeting  expectations of
our performance, including the development and commercialization of our products
and proposed products; and (3) general economic and market conditions.

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

         As September 3, 1999, our executive  officers,  directors and principal
stockholders  beneficially  owned,  in the aggregate,  approximately  26% 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.

We have 7,853,132 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 September 3, 1999, we had 7,853,132  shares of
common  stock  reserved  for  possible  future   issuances  upon  conversion  of
outstanding  convertible securities,  options and warrants.  Certain convertible
securities,  options and warrants are convertible into 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

                                      - 5 -

<PAGE>



trading  price of the common  stock and could  increase  the  volatility  in the
trading price of the common stock.  See the section  entitled  "Dilution"  for a
summary of the number of shares  which  could be issued upon  conversion  of the
outstanding preferred stock at various market prices.



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

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

         Our Certificate of Incorporation authorizes anti-takeover measures like
the authority to issue "blank check"  preferred stock and the staggered 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 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.

                                      - 6 -

<PAGE>



         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:

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

          .         Quarterly Reports on Form 10-QSB for the periods ended March
                    31, 1999 and June 30, 1999; and

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

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

          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.

                                    DILUTION

         As of  September  3, 1999,  we had issued  and  outstanding  23,318,576
shares of common stock. At that date, there were an additional  7,853,132 shares
of common stock reserved for possible future issuances as follows:

         .        options to  purchase  2,047,700  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;


                                      - 7 -

<PAGE>



         .        warrants  to  purchase  1,177,750  shares at an price  between
                  $1.76 and  $18.00  per share.  We have  registered  a total of
                  847,750 shares issuable upon exercise of these  warrants.  The
                  balance   of  330,000   will  be  deemed  to  be   "restricted
                  securities" when issued; and

         .        525,000 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.

         .        4,102,682  shares issuable upon conversion of (a) 93.75 shares
                  of series C convertible  preferred  stock, (b) 7,500 shares of
                  series D convertible  preferred stock, and (c) 2,100 shares of
                  series E convertible preferred stock outstanding. All of those
                  shares of common stock would be freely  tradeable when issued,
                  including 1,266,074 shares covered by this prospectus.

         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.


Dilution Effects of the Conversion of Outstanding Preferred Stock

         The outstanding  series C, D and E preferred stock is convertible  into
common stock over time at the  discretion of the holders.  While the  conversion
timing,  terms,  conditions and formulas vary for each issue,  if the holders of
these  preferred  stock  securities were able to fully convert their shares into
common stock on September 3, 1999 and elected to do so, approximately  6,989,463
additional shares of common stock would be issued. In addition,  you should note
the following:

         .        The  outstanding  convertible  series  C,  D and  E  preferred
                  securities  are  convertible  at a  floating  rate  based on a
                  discount to the market price of the common stock. As a result,
                  the lower the stock price around the time the holder converts,
                  the more common shares the holder receives.

         .        To the extent the selling  stockholders  convert and then sell
                  their common stock, the common stock price may decrease due to
                  the  additional  shares in the  market.  This could  allow the
                  selling  stockholders to convert their  convertible  preferred
                  stock into

                                      - 8 -

<PAGE>



                  greater  amounts  of common  stock,  the sales of which  would
                  further depress the stock price.

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

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

         The following  table describes the amount of shares of our common stock
into  which the  series D and E  convertible  preferred  stock  would  have been
convertible if the holders of these securities could have fully converted all of
the series D and E convertible  preferred stock on September 3, 1999 pursuant to
the following  market prices.  This table also describes the  percentages of our
total  outstanding  common stock  represented by the shares of common into which
all of the  Series  D and E  convertible  preferred  stock  was  convertible  on
September 3, 1999. For purposes of this table, we assume that the average of the
three lowest  closing  market  prices for a share of our common stock during the
immediately  preceding 20 day trading  period before  conversion was the same as
the price per share in each of the  respective  rows of column  one of the table
and we also assume that the registration  statement had been declared  effective
by September 3, 1999.



<TABLE>
<S>                         <C>              <C>            <C>                <C>                    <C>

                                                                               Number of shares of     Percentage of our outstanding
                                                                                   common stock           common stock represented
                                                                                  issuable upon           by the shares of common
                                                                                conversion of the           stock issuable upon
   Percentage of market       Conversion      Conversion      Conversion        Series C, D and E      conversion of the Series C, D
  price per share of our       price for      price for        price for           convertible             and E preferred stock
       common stock            Series C        Series D        Series E          preferred stock            following conversion
      --------------           --------        --------        --------         -----------------          ---------------------
At $2.812 per share
(200% of the market
price at Sept. 3, 1999)         $2.812          $2.812          $2.643              3,495,032                      15.0%
At $2.461 per share
(175% of the market
price at Sept. 3, 1999)         $2.461          $2.461          $2.313              3,994,175                      17.1%
At $1.406 per share
(market price at Sept. 3,
1999)                           $1.406          $1.406          $1.322              6,989,463                      30.0%



</TABLE>

                                                           - 9 -

<PAGE>


<TABLE>
<S>                           <C>              <C>              <C>             <C>                    <C>

                                                                               Number of shares of     Percentage of our outstanding
At $1.055 per share
(75% of market price at
Sept. 3, 1999)                  $1.055          $1.055          $0.991              9,320,353                      40.0%
At $0.703 per share             $0.703          $0.703          $0.661              13,978,925                     59.9%
(50% of market price at
Sept. 3, 1999)
- --------------------------- --------------- --------------  ---------------  ------------------------ -----------------------------
</TABLE>


                              SELLING STOCKHOLDERS

         The  following  table lists certain  information  regarding the selling
stockholders'  ownership  of shares of our common stock as of September 3, 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."

<TABLE>
<S>                                <C>                           <C>                 <C>            <C>

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

Forest Avenue LLC (3)                               1,106,992 (1)      4.5%        1,106,992 (1)       0            *
Warwick Corporation (4)                               234,082 (2)      0.9%          234,082 (2)       0            *
 Total                                                  1,341,074      5.4%            1,341,074       0
                                                        =========      ====            =========       =

</TABLE>

* Less than 1%

(1)  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) 687,994 common stock issuable upon
     conversion  of 2,000  shares  of  series E  preferred  stock  and ; and (b)
     warrants to purchase  50,000 shares of common stock at an exercise price of
     $4.648 per share.



                                     - 10 -

<PAGE>



(2)      Includes  150% of (a)  121,655  shares of common  stock  issuable  upon
         conversion  of 500  shares of series D  preferred  stock and (b) 34,400
         shares  issuable  upon  conversion  of 100 shares of series E preferred
         stock.

(3)      Navigator Management, a British Virgin Islands company, is the director
         of Forest Avenue LLC, a Cayman  Islands  entity.  Mr. David Sims is the
         controlling  person  of  Navigator   Management  and,  therefore,   the
         controlling person of Forest Avenue LLC.

(4)      Ms.  Dawn  Davies is the  director  and  controlling  person of Warwick
         Corporation.

     Other than being an  investor  in the  private  placement  for the series E
preferred stock, Forest Avenue LLC has not had any material relationship with us
during  the past  three  years.  Warwick  Corporation  has not had any  material
relationship with us during the past three years.


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


                                     - 11 -

<PAGE>



                            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 23,318,576 shares of
common stock, 93.75 shares of series C preferred stock, 7,500 shares of series D
preferred  stock  and  2,100  shares  of series E  preferred  stock  issued  and
outstanding. We have reserved 7,853,132 shares of common stock for issuance upon
conversion of the preferred stock and outstanding options and warrants.


Common Stock

     Voting

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

     Dividends

     Holders of common stock are entitled to receive  ratably 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 -

<PAGE>



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




Series C Preferred Stock

         On May 15, 1998,  our board of directors  authorized  the issuance of a
series of preferred stock  consisting of 375 shares of series C preferred stock.
Each  share of series C  preferred  stock has a stated  value,  or  "liquidation
preference",  of up to $1,000,  which means that, in the event of a liquidation,
dissolution or winding up of our company, for example, if we go bankrupt and all
of our  assets  are sold,  the  holders of each  share  would be  entitled  to a
preferential  payment of up to $1,000  before  holders of our common stock would
receive any of the proceeds from the sale. A certificate  of  designation  filed
with the secretary of state of Delaware  governs the terms and conditions of the
series C preferred stock.  The following is a brief  description of key terms of
the series C preferred stock.

         Dividends

         The  holders of the series C preferred  stock are  entitled to receive,
when and as declared by our board of  directors,  dividends at the rate of 5% of
the liquidation  preference per share per annum,  and no more,  payable,  at the
discretion of our 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 our  common  stock or any  other  equity  securities  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 our  company,  the  holders  of series C  preferred  stock then
outstanding  shall be  entitled  to be paid,  out of our  assets  available  for
distribution to our 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, the assets available for distribution
to our  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 our assets
shall be deemed to be a  liquidation,  dissolution  or winding up of our company
but the merger or consolidation of our company into or with another  corporation
or into or with our company, shall not be deemed to be a liquidation, winding up
or  dissolution  of our company.  The holders of series C preferred  stock shall
have no priority  or  preference  with  respect to  distributions  made by us 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 us and such persons.


                                     - 13 -

<PAGE>



         Conversion Rights

         The holders of series C preferred stock shall have the right to convert
their shares into common stock as follows:

                  (i)      prior to  August  15,  1998,  no  shares  of series C
                           preferred stock may be converted;

                  (ii)     beginning August 15, 1998,  holders may convert up to
                           25% of the  shares of series C  preferred  stock then
                           outstanding; and

                  (iii)    on November 15,  1998,  February 15, 1999 and May 15,
                           1999, holders may convert up to an additional 25% the
                           shares of series C preferred stock then  outstanding,
                           on a cumulative and pro rata basis.

         The number of shares of common  stock into which each share of series C
preferred stock may be converted shall be determined by dividing the liquidation
preference, or $1,000, by an amount 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 us, and

                  (b)      $4.00.

         In the event the shares of series C preferred  stock are not  converted
within ten business  days of receipt by us of a valid notice of  conversion,  we
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% 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 we 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 ours.

         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,  we shall pay cash equal to such  fraction
multiplied by the fair market value of the common stock on the conversion  date,
as  determined  by our board of  directors.  We 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 us or our transfer agent as provided above, or the holder
notifies us or our transfer agent that such  certificates have been lost, stolen
or destroyed and executes an agreement  satisfactory  to us to indemnify us 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


                                     - 14 -

<PAGE>



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,  we 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 us with respect to such shares.

         We shall at all times when any shares of series C preferred stock shall
be  outstanding,  reserve and keep  available out of our 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,  we may  redeem  up to 100% of the
outstanding shares of the series C preferred stock at the applicable  redemption
price, provided, that (x) we shall have received a notice of conversion, and (y)
the Conversion  Price is below $3.40.  We 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.  Such notice shall state the redemption date, the redemption  price,
the number of shares of series C preferred  stock of such holders to be redeemed
and shall call upon such holders to surrender  to us 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 our board of directors.
The  redemption  date  shall be no more than 10 days  after  receipt  of written
notice from us. If we fail to pay the redemption  price on the redemption  date,
we shall  pay to the  holder a penalty  in an amount in cash  equal to 2% of the
redemption  price  to be  paid on such  redemption  date.  If we fail 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 us and  not
redeemed.  We shall have the right to redeem the series C preferred stock in any
subsequent redemption;  provided, however, that if we fail to pay the redemption
price in a  subsequent  redemption  within 10 days,  we 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 us at the place  designated  in such notice and shall
thereupon be entitled to receive payment of the redemption price.

         We  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 we have  defaulted 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
our company, except the right to receive, without interest, the redemption price
thereof upon surrender

                                     - 15 -

<PAGE>



of certificates  representing  the shares of series C preferred  stock, and such
shares  shall not  thereafter  be  transferred  (except with our consent) on our
books and shall not be deemed outstanding for any purpose whatsoever.

         There  shall be no  redemption  of any shares of our series C preferred
stock 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 our
business or affairs or for any other purpose.

Series D Preferred Stock

         On March 8, 1999,  our board of directors  authorized the issuance of a
series of  preferred  stock  consisting  of 10,500  shares of series D preferred
stock.  Each  share  of  series  D  preferred  stock  has  a  stated  value,  or
"liquidation  preference",  of up to $1,000, which means that, in the event of a
liquidation,  dissolution  or winding up of our company,  for example,  if we go
bankrupt  and all of our assets  are sold,  the  holders of each share  would be
entitled to a preferential  payment of up to $1,000 before holders of our common
stock  would  receive  any of the  proceeds  from the  sale.  A  certificate  of
designation  filed with the secretary of state of Delaware governs the terms and
conditions of the series D preferred stock. The following is a brief description
of key terms of the series D preferred stock.

         Dividends

         The holders of series D preferred stock are entitled to receive, out of
any assets at the time  legally  available  therefor and when and as declared by
our  board  of  directors,  dividends  at  the  rate  of 5% of  the  liquidation
preference per share per annum, and no more,  payable,  at the discretion of our
board of  directors,  only at  conversion  of the series D preferred  stock into
common stock in common stock or cash. Dividends accrue on each share of series D
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 ours that are junior to  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 our company  the holders of shares of series D preferred  stock
then  outstanding  shall be entitled to be paid, out of our assets available for
distribution to our stockholders,  an amount equal to the liquidation preference
for each  share of  series D  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 our company our assets available for
distribution to our stockholders shall be insufficient to pay the holders of the
series D preferred stock the full liquidation preference plus accrued and unpaid
dividends  to which they  respectively  shall be  entitled,  the  holders of the
series D  preferred  stock  together  with the  holders  of any other  series of
preferred  stock ranking on a parity with the series D 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

                                     - 16 -

<PAGE>



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. The sale or
other   disposition   (for   cash,   shares  of  stock,   securities   or  other
consideration),  of all or substantially all of our assets shall be deemed to be
a  liquidation,  dissolution  or  winding  up of our  company  but the merger or
consolidation  of us into or with another  corporation or into or with us, shall
not be deemed to be a liquidation, winding up or dissolution of our company. The
holders of series D preferred  stock shall have no priority or  preference  with
respect to distributions  made by us 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 us and such persons.

         Conversion Rights

         The holders of series D preferred stock shall have the right to convert
their shares into common stock as follows, on a cumulative and pro rata basis:

                  (i)      prior  to May 17,  1999,  a  holder  may not  convert
                           series D preferred stock;

                  (ii)     beginning May 17, 1999, holders may convert up to 30%
                           of the shares of series D preferred stock issuable to
                           each of the holders;

                  (iii)    beginning  on June 16,  1999,  holders may convert an
                           additional  30% of the  shares of series D  preferred
                           stock issuable to each of the holders;

                  (iv)     beginning  on July 16,  1999,  holders may convert an
                           additional  30% of the  shares of series D  preferred
                           stock issuable to each of the holders;

                  (v)      beginning on August 15, 1999, holders may convert the
                           final 10% of the shares of series D  preferred  stock
                           issuable to each of the holders.

         The number of shares of common  stock into which each share of series D
preferred stock may be converted shall be determined by dividing the liquidation
preference, or $1,000, by an amount equal to the lesser of :

                  (i)      $4.875 and

                  (ii)     100% of the "market  price",  which means 100% of the
                           average  of the 3 lowest  closing  bid  prices of the
                           common stock as reported by Bloomberg L.P. during the
                           20 day trading period immediately  preceding the date
                           on which the holder gives to us notice of  conversion
                           of series D preferred stock.

         No fractional shares of common stock shall be issued upon conversion of
the series D  preferred  stock.  In lieu of any  fractional  shares to which the
holder would  otherwise be  entitled,  we shall pay cash equal to such  fraction
multiplied by the fair market value of the common stock on the date on which the
holder  gives to us  notice  of  conversion  of  series D  preferred  stock,  as
determined  by our board of directors.  We are  obligated to issue  certificates
evidencing the shares of common stock issuable upon conversion unless either the
certificates evidencing such shares of series D preferred stock are delivered

                                     - 17 -

<PAGE>



to us or our transfer agent as provided  above, or the holder notifies us or our
transfer agent that such  certificates  have been lost,  stolen or destroyed and
executes an agreement  satisfactory to us to indemnify us from any loss incurred
by it in connection with such certificates.

         We are not obligated to issue upon conversion of the series D preferred
stock  shares of common  stock  equal to more than  19.99% of the  common  stock
outstanding  on  March  10,  1999  unless  such  issuance  is  approved  by  our
stockholders.  In the  event  that  such  approval  is  not  obtained  from  our
stockholders, we shall be in default and the holders shall have all their rights
and remedies.

         Subject to the 19.99%  restriction on conversion of the preferred stock
described above, on March 10, 2001, each share of series D preferred stock which
remains outstanding shall be automatically converted on such date into shares of
common stock.

         Redemption

         We may, at the option of our board of  directors,  redeem up to 100% of
the  outstanding  shares of the series D preferred stock upon five business days
notice of redemption to the holders at a price payable in cash equal to:

                  (a)      $1,080 plus any accrued but unpaid  dividends  if the
                           redemption occurs on or before May 9, 1999;

                  (b)      $1,120 plus any accrued but unpaid  dividends  if the
                           redemption  occurs  between  May 10, 1999 and July 8,
                           1999; and

                  (c)      $1,150 plus any accrued but unpaid  dividends  if the
                           redemption occurs after July 9, 1999.

         Upon  receipt of a  redemption  notice,  a holder of series D preferred
stock shall have the right to convert, upon notice to us, up to a maximum of 20%
of the  total  amount of  series D  preferred  stock  issuable  to such  holder,
provided,  such conversion is within 3 business days from the time the notice of
redemption  is  received  by  the  holder.  If we  fail  to pay  the  applicable
redemption price by the sixth trading day following the date of redemption,  the
redemption will be declared null and void and we shall lose our right to serve a
notice of redemption in the future.

         From and after the date of redemption  (unless default shall be made by
us in duly paying the applicable  redemption  price in which case all the rights
of the holders of such shares shall continue),  the holders of the shares of the
series D preferred stock called for redemption shall cease to have any rights as
our stockholders,  except the right to receive, without interest, the applicable
redemption price thereof upon surrender of certificates  representing the shares
of series D preferred stock, and such shares shall not thereafter be transferred
(except with our consent) on our books and shall not be deemed  outstanding  for
any purpose whatsoever.

         There  shall be no  redemption  of any shares of the series D preferred
stock where such action would be in violation of applicable law.

         No Voting Rights

                                     - 18 -

<PAGE>



         Except as  otherwise  required  by law,  the  holders  of the  series D
preferred  stock shall not be  entitled to vote upon any matter  relating to our
business or affairs or for any other purpose.

Series D Warrants

         Each of the investors who purchased  series D preferred stock will have
received the number of warrants that directly corresponds with the dollar amount
such investor  invested in the series D preferred  stock. The series D preferred
stock has an exercise price equal to $6.09 and an exercise period of three years
from the date of issuance.  The exercise  price of the warrants will be adjusted
and the  number  of shares of common  stock to be issued  upon  exercise  of the
warrants will be adjusted upon the occurrence of, among other things, redemption
of the series D preferred stock,  declaration or payment of a dividend in shares
of common  stock or  distribution  in shares of common  stock to  holders of our
outstanding common stock,  subdivision,  combination or  reclassification of the
common  stock.  In the event we redeem  series D preferred  stock,  the exercise
price of a pro rata amount of the  warrants  shall be reduced to $5.61.  Such an
adjustment  of the  exercise  price  downward  will  result in the  issuance  of
additional shares of common stock upon exercise of the warrants.

         We may  call,  upon  written  notice,  (x) up to  50% of the  Series  D
Warrants at a price equal to $6.09 if the common  stock  trades at a price equal
to or greater  than $9.75 for 20  consecutive  trading  day prior to the date we
call the warrants and (y) up to 50% of the outstanding warrants at a price equal
to $6.09 per share of Common Stock into which the warrants is convertible if the
common  stock  trades  at a  price  equal  to or  greater  than  $12.19  for  20
consecutive trading days prior to the date we call the warrants.  The rights and
privileges  granted  pursuant to the warrants shall  terminate 30 days after the
call  notice is sent to the  holder of such  warrants  if the  warrants  are not
exercised during the 30 day period.  In the event the warrants are not exercised
during this  period we will remit to the holder  $.01 per share of common  stock
into which the  warrants  are  convertible  upon the holder  tendering to us the
expired warrant certificate.

Series E Preferred Stock

         On May 7, 1999,  our board of  directors  authorized  the issuance of a
series of  preferred  stock  consisting  of 2,100  shares of series E  preferred
stock.  Each  share  of  series  D  preferred  stock  has  a  stated  value,  or
"liquidation  preference",  of up to $1,000, which means that, in the event of a
liquidation,  dissolution  or winding up of our company,  for example,  if we go
bankrupt  and all of our assets  are sold,  the  holders of each share  would be
entitled to a preferential  payment of up to $1,000 before holders of our common
stock  would  receive  any of the  proceeds  from the  sale.  A  certificate  of
designation  filed with the secretary of state of Delaware governs the terms and
conditions of the series D preferred stock. The following is a brief description
of key terms of the series D preferred stock.

         Dividends

         The holders of series E preferred stock are entitled to receive, out of
any assets at the time  legally  available  therefor and when and as declared by
our  board  of  directors,  dividends  at  the  rate  of 5% of  the  liquidation
preference per share per annum, and no more,  payable,  at the discretion of our
board of  directors,  only at  conversion  of the series E preferred  stock into
common stock in common stock or cash. Dividends accrue on each share of series E
preferred  stock  from the  date of  initial  issuance.  Such  dividends  are in
preference to any distributions on any outstanding shares of common

                                     - 19 -

<PAGE>



stock or any other equity  securities  of ours 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 our  company,  the  holders of shares of the series E preferred
stock then  outstanding  shall be entitled to be paid,  out of the assets of our
company available for distribution to our  stockholders,  an amount equal to the
liquidation  preference for each share of series E 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 our company, the assets of our
company available for distribution to our stockholders  shall be insufficient to
pay the holders of the series E preferred stock the full liquidation  preference
plus accrued and unpaid dividends to which they respectively  shall be entitled,
the holders of the series E  preferred  stock  together  with the holders of any
other series of preferred  stock ranking on a parity with the series E 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. The sale or other  disposition
(for  cash,  shares  of stock,  securities  or other  consideration),  of all or
substantially  all  of the  assets  of  our  company  shall  be  deemed  to be a
liquidation,  dissolution  or  winding  up of our  company  but  the  merger  or
consolidation  of our company into or with another  corporation  or into or with
our company, shall not be deemed to be a liquidation,  winding up or dissolution
of our company.  The holders of series E preferred  stock shall have no priority
or preference  with respect to  distributions  made by our 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 our
company and such persons.

         Conversion Rights

         The holders of series E preferred stock shall have the right to convert
their shares into common stock as follows, on a cumulative and pro rata basis,:

                  (i)      prior to the earlier of (x) the effective date of the
                           registration  statement covering the shares of common
                           stock  issuable  upon  conversion  of  the  series  E
                           preferred stock and (y) September 9, 1999 (the "First
                           Conversion  Date"),  no shares of series E  preferred
                           stock may be converted;

                  (ii)     during  the thirty  day  period  following  the First
                           Conversion Date, holders may convert up to 25% of the
                           shares  of  the   series  E   preferred   stock  then
                           outstanding;

                  (iii)    during  each 30 day period  thereafter,  holders  may
                           convert an  additional  25% of the shares of series E
                           preferred stock issued on May 11, 1999,

provided,  however,  that if the  trading  volume of the common  stock for the 2
weeks prior to the First Conversion Date equals or exceeds 150,000,  during each
30 day  period  following  the First  Conversion  Date up to 33% of the series E
preferred stock may be converted.

                                     - 20 -

<PAGE>



         The number of shares of common  stock into which each share of series E
preferred stock may be converted shall be determined by dividing the liquidation
preference, or $1,000, by an amount equal to the lesser of :

                  (i)      $3.719 and

                  (ii)     94% of the average of the 3 lowest closing bid prices
                           of the common  stock,  not  necessarily  consecutive,
                           during  the  20  day   trading   period   immediately
                           preceding  the date on which  the  holder  gives us a
                           notice of conversion of series E preferred stock.

         No fractional shares of common stock shall be issued upon conversion of
the series E  preferred  stock.  In lieu of any  fractional  shares to which the
holder would  otherwise be  entitled,  we shall pay cash equal to such  fraction
multiplied by the fair market value of the common stock on the date on which the
holder  gives  us a  notice  of  conversion  of  series E  preferred  stock,  as
determined by our board of directors. We are not obligated to issue certificates
evidencing the shares of common stock issuable upon conversion unless either the
certificates evidencing such shares of series E preferred stock are delivered to
us or our transfer  agent as provided  above,  or the holder  notifies us or our
transfer agent that such  certificates  have been lost,  stolen or destroyed and
executes an agreement  satisfactory to us to indemnify us from any loss incurred
by it in connection with such certificates.

         We are not obligated to issue upon conversion of the series E preferred
stock  shares of common  stock  equal to more than  19.99% of the  common  stock
outstanding  on the date of issuance of the series E  preferred  stock,  May 11,
1999, unless such issuance is approved by our stockholders. In the event that we
fail to call a  stockholders  meeting  or  approval  is not  obtained  from  our
stockholders,  each holder of series E preferred  stock shall have the right, at
such holder's option,  to require us to redeem all or a portion of such holder's
shares of series E preferred stock which we are unable to convert at a price per
share equal to 115% of the liquidation  preference,  or $1,150, plus any accrued
but unpaid dividends.

         Subject to the 19.99%  conversion  restriction  described above, on May
11, 2001, each share of series E preferred stock which remains outstanding shall
be automatically converted on such date into shares of common stock.

         We will reserve and keep  available a sufficient  number of  authorized
shares of common stock to enable the conversion of all outstanding shares of the
preferred stock.

         Redemption

         We may, at the option of our board of  directors,  redeem up to 100% of
the  outstanding  shares of the series E preferred stock upon five business days
notice of redemption to the holders at a price payable in cash equal to:

                  (a)      $1,080 plus any accrued but unpaid  dividends  if the
                           redemption occurs on or before July 10, 1999;


                                     - 21 -

<PAGE>



                  (b)      $1,120 plus any accrued but unpaid  dividends  if the
                           redemptions   occurs   between   July  11,  1999  and
                           September 8, 1999; and

                  (c)      $1,150 plus any accrued but unpaid  dividends  if the
                           redemption occurs after September 9, 1999.

provided,  that the closing bid price of the common  stock is greater than $5.00
per share.  Upon receipt of a redemption  notice, a holder of series E preferred
stock shall have the right to convert, upon notice to us, up to a maximum of 20%
of the total amount of series E preferred stock to be redeemed,  provided,  such
conversion is within 24 hours from the time the notice of redemption is received
by the holder.  If we fail to pay the applicable  redemption  price by the sixth
trading day following the date of redemption,  the  redemption  will be declared
null  and void  and the  company  shall  lose  our  right  to serve a notice  of
redemption in the future.

         From and after the date of redemption (unless we have defaulted in duly
paying  the  applicable  redemption  price in which  case all the  rights of the
holders of such shares shall continue),  the holders of the shares of the series
E preferred  stock called for  redemption  shall cease to have any rights as our
stockholders,  except the right to receive,  without  interest,  the  applicable
redemption price thereof upon surrender of certificates  representing the shares
of series E preferred stock, and such shares shall not thereafter be transferred
(except with our consent) on our books and shall not be deemed  outstanding  for
any purpose whatsoever.

         There  shall be no  redemption  of any shares of the series E preferred
stock where such action would be in violation of applicable law.

         No Voting Rights

         Except as  otherwise  required  by law,  the  holders  of the  series E
preferred  stock shall not be  entitled to vote upon any matter  relating to our
business or affairs or for any other purpose.

Series E Warrants

         We have  also  issued  to  certain  investors  warrants  which  have an
exercise  price  equal to $4.65 and an  exercise  period of three years from the
date of issuance.  The exercise  price of the warrants  will be adjusted and the
number of shares of common stock to be issued upon exercise of the warrants will
be adjusted upon the occurrence of, among other things, redemption of the series
E  preferred  stock,  declaration  or payment of a dividend  in shares of common
stock  or  the  distribution  in  shares  of  common  stock  to  holders  of its
outstanding common stock,  subdivision,  combination or  reclassification of the
common  stock.  In the event we redeem  series E preferred  stock,  the exercise
price of a pro rata  amount of the  warrant  shall be reduced to $4.28.  Such an
adjustment  of the  exercise  price  downward  will  result in the  issuance  of
additional shares of common stock upon exercise of the warrants.

         We may call, upon written notice, up to 50% of the outstanding warrants
at a price  equal to $4.65 if the  common  stock  trades at a price  equal to or
greater than $9.30 for 20 consecutive  trading day prior to the date we call the
warrants and up to 50% of the outstanding warrants at a price equal to $4.65 per
share of common  stock into which the  warrants  are  convertible  if the common
stock  trades at a price  equal to or greater  than  $11.63  for 20  consecutive
trading day prior to the date we call the

                                     - 22 -

<PAGE>



warrants.  The rights and  privileges  granted  pursuant to the  warrants  shall
terminate  30 days after the call notice is sent to the holder of such  warrants
if the warrants  are not  exercised  during the 30 day period.  In the event the
warrants are not exercised  during this period we will remit to the holders $.01
per share of common  stock  into which the  warrants  are  convertible  upon the
holder tendering to us the expired warrant certificate.



Warrants

         Of the total  1,341,074  shares of common stock  registered for sale by
the selling stockholders,  50,000 shares are issuable upon exercise of currently
exercisable  warrants.  Due to the terms of the  registration  rights  agreement
between Xybernaut and the selling  stockholder,  this prospectus covers the sale
of 75,000  shares of common stock  issuable  upon  exercise of the warrant.  The
75,000 shares represent 150% of the original number of shares issuable under the
warrant.  The  warrants  were  issued  to  one of the  selling  stockholders  in
connection with a private placement.  The exercise price and term of the warrant
are as follows:


    Warrants            Exercise Price                 Expiration Date
     50,000                   $ 4.648                    May 11, 2002

         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:

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

         .        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;

         .        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


                                     - 23 -

<PAGE>



                  outstanding  shares entitled to vote generally in the election
                  of directors voting together as a single class;

         .        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;

         .        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;

         .         eliminate stockholder action by written consent;

         .        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

         .        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:

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

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


                                     - 24 -

<PAGE>



         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:

         .        ordinary brokerage  transactions and transactions in which the
                  broker solicits purchasers;
         .        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;
         .        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
         .        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:

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

         .        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

         .        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.


                                     - 25 -

<PAGE>



                 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.



                                     - 26 -

<PAGE>



                                  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.



                                     - 27 -

<PAGE>










<TABLE>

<S>                                                                             <C>

        We have not authorized any dealer,
salesperson or any other person to give any                                           1,341,074
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.                                                        XYBERNAUT CORPORATION




                    TABLE OF CONTENTS

                                                    Page

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

                                                                           _________________________, 1999







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

</TABLE>
<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

         The following table sets forth the various  expenses which will be paid
by 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......................       $1,269.00
 Legal fees and expenses....................................      $10,000.00
 Accounting expenses........................................       $5,000.00
                                                                   ---------
      Total.................................................      $16,269.00
                                                                  ==========

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

<PAGE>



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(1)   Certificate of Designation of the Series D Preferred Stock.
3.2(1)   Certificate of Designation of the Series D Preferred  Stock, as amended
         May 12, 1999.
3.3(1)   Certificate of Designation of the Series E Preferred Stock.
3.4(1)   Certificate of Designation of the Series E Preferred  Stock, as amended
         May 12, 1999.
4.1(1)   Form of Securities  Purchase Agreement used in the May 11, 1999 private
         placement  for  relating to the  issuance  of 2,000  shares of Series E
         Convertible Preferred Stock.
4.2(1)   Form of Warrant used in the May 11, 1999 private placement  relating to
         the issuance of 2,000 shares of Series E Convertible  Preferred  Stock.
         5(1) Opinion of Parker Chapin Flattau & Klimpl, LLP.
10.1(1)  Form of Registration  Rights Agreement used in the May 11, 1999 private
         placement  relating  to the  issuance  of  2,000  shares  of  Series  E
         Convertible Preferred Stock.
10.2(1)  Form of Escrow  Agreement  used in the May 11, 1999  private  placement
         relating  to the  issuance  of 2,000  shares  of  Series E  Convertible
         Preferred Stock.
10.3     Form of finder's  agreement dated March 8, 1999 between the Company and
         Settondown Capital International Ltd. for the placement of the Series D
         Preferred Stock.
10.4     Form of finder's  agreement  dated May 11, 1999 between the Company and
         Settondown Capital International Ltd. for the placement of the Series E
         Preferred Stock.
23.1(2)  Consent of PricewaterhouseCoopers LLP
23.2(1)  Consent  of Parker  Chapin  Flattau & Klimpl,  LLP  (included  in their
         opinion filed as Exhibit 5.1).
24.1(1)  Power of Attorney (included on page II-4).
- --------------

(1)      Included  as exhibits  with the  original  filing of this  registration
         statement.
(2)      To be filed by amendment.



ITEM 17.  UNDERTAKINGS.

         The undersigned registrant hereby undertakes:


                                      II-2

<PAGE>



         (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;

         (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

                                      II-3

<PAGE>



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-4

<PAGE>



                                   SIGNATURES




         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of Fairfax,  Commonwealth  of Virginia on  September 8,
1999.

                                            XYBERNAUT CORPORATION


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

         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
registration  statement  on Form S-3 has  been  signed  below  by the  following
persons in the capacities and on September 8, 1999.



                SIGNATURE                                     TITLE
                                             Chairman of the Board,
                                             President and Chief Executive
/s/ Edward G. Newman                         Officer
Edward G. Newman


*                                            Executive Vice President -
Kaz Toyosato                                 Asian Operations and Director

*                                            Chief Operating Officer and
John F. Moynahan                             Chief Financial Officer


*
Martin Eric Weisberg                         Secretary and Director


*                                            Director
Lt. Gen. Harry E. Soyster



                                      II-5

<PAGE>



                SIGNATURE                                     TITLE

*                                            Director
James J. Ralabate


*                                            Director
Keith P. Hicks


*                                            Vice Chairman and
Steven A. Newman                             Director


*                                            Director
Phillip E. Pearce


*                                            Director
Eugene J. Amobi

*                                            Director
Edwin Vogt


By: Edward G. Newman
      Attorney-in-fact



                                      II-6

<PAGE>




                                 SECURITIES AND
                                    EXCHANGE
                                   COMMISSION

                             WASHINGTON, D.C. 20549


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




                              EXHIBITS TO FORM S-3

                             REGISTRATION STATEMENT

                                      UNDER

                           THE SECURITIES ACT OF 1933

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


<PAGE>







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



                               SEPTEMBER 10, 1999


                                       E-1

<PAGE>



NUMBER            DESCRIPTION OF EXHIBIT

3.1(1)   Certificate of Designation of the Series D Preferred Stock.
3.2(1)   Certificate of Designation of the Series D Preferred  Stock, as amended
         May 12, 1999.
3.3(1)   Certificate of Designation of the Series E Preferred Stock.
3.4(1)   Certificate of Designation of the Series E Preferred  Stock, as amended
         May 12, 1999.
4.1(1)   Form of Securities  Purchase Agreement used in the May 11, 1999 private
         placement  for  relating to the  issuance  of 2,000  shares of Series E
         Convertible Preferred Stock.
4.2(1)   Form of Warrant used in the May 11, 1999 private placement  relating to
         the issuance of 2,000 shares of Series E Convertible Preferred Stock.
5(1)     Opinion of Parker Chapin Flattau & Klimpl, LLP.
10.1(1)  Form of Registration  Rights Agreement used in the May 11, 1999 private
         placement  relating  to the  issuance  of  2,000  shares  of  Series  E
         Convertible Preferred Stock.
10.2(1)  Form of Escrow  Agreement  used in the May 11, 1999  private  placement
         relating  to the  issuance  of 2,000  shares  of  Series E  Convertible
         Preferred Stock.
10.3     Form of finder's  agreement dated March 8, 1999 between the Company and
         Settondown Capital International Ltd. for the placement of the Series D
         Preferred Stock.
10.4     Form of finder's  agreement  dated May 11, 1999 between the Company and
         Settondown Capital International Ltd. for the placement of the Series E
         Preferred Stock.
23.1(2)  Consent of PricewaterhouseCoopers LLP
23.2(1)  Consent  of Parker  Chapin  Flattau & Klimpl,  LLP  (included  in their
         opinion filed as Exhibit 5.1).
24.1(1)  Power of Attorney (included on page II-4).
- --------------

(1)      Included  as exhibits  with the  original  filing of this  registration
         statement.
(2)      To be filed by amendment.


                                       E-2

<PAGE>



                                                                 Exhibit 10.3

                           FORM OF FINDER'S AGREEMENT
                              Xybernaut Corporation
                       12701 Fair Lakes Circle, Suite 550
                                Fairfax, VA 22033



                                                              March 8, 1999



Settondown Capital International, Ltd.
P.O. Box N. 9204
Charlotte & House
Charlotte Street
Nassau, The Bahamas

Gentlemen:

         Reference is made to that certain  securities  purchase agreement dated
as of March 8, 1999 (the "Securities Purchase Agreement") by and among Xybernaut
Corporation, a Delaware corporation (the "Company"), and various investors party
thereto (the  "Investors").  Capitalized terms used and not defined herein shall
have the same meanings as assigned to them in the Securities Purchase Agreement.

         This letter  agreement is intended to set forth the  understanding  and
agreement  pursuant to which the Company has retained the services of Settondown
Capital  International,  Ltd.  ("Settondown") to act as the Company's  financial
advisor in connection with a private placement of the Company's securities which
is intended to raise up to $10,000,000 for the Company (the "Transaction").

         As full  compensation for arranging and assisting with the Transaction,
it is agreed that the Company shall compensate Settondown as follows:

         1. The Company shall pay Settondown a fee equal to five percent (5%) of
the aggregate amount of the Preferred Stock purchased by the Investors.  The fee
shall be paid on each Closing Date in the form of Preferred  Stock issued by the
Company to Settondown.

         2. This  letter  agreement  sets  forth the  entire  understanding  and
agreement between  Settondown and the Company with respect to the subject matter
hereof  and  this  Agreement   supersedes   all  prior  and/or   contemporaneous
understandings  and  agreements  with  respect to such subject  matter  (whether
written or oral), all of which are merged herein.

                                       E-3

<PAGE>



         3.  This  letter  agreement  shall  be  governed  by and  construed  in
accordance  with the laws of the State of New  York,  without  reference  to its
conflicts of laws provisions. This letter agreement may not be amended, modified
or waived,  except by an  instrument in writing duly executed by the Company and
Settondown.

         Please  evidence your  concurrence  to the terms and provisions of this
letter  agreement,  by executing  and returning the enclosed copy of this letter
agreement.

                                       Very truly yours,

                                       XYBERNAUT CORPORATION


                                       By:________________________________
                                           Name:  Steven Newman
                                           Title:   Vice Chairman

Agreed and Accepted:

SETTONDOWN CAPITAL INTERNATIONAL,
   LTD.


By:______________________________
         Name:
         Title:

                                       E-4

<PAGE>



                                                                  Exhibit 10.4

                              Xybernaut Corporation
                       12701 Fair Lakes Circle, Suite 550
                                Fairfax, VA 22033


                                                              May 11, 1999



Settondown Capital International, Ltd.
P.O. Box N. 9204
Charlotte & House
Charlotte Street
Nassau, The Bahamas

Gentlemen:

         Reference is made to that certain  securities  purchase agreement dated
as of May  11,  1999  (the  "Securities  Purchase  Agreement")  by  and  between
Xybernaut Corporation, a Delaware corporation (the "Company"), and Forest Avenue
LLC, a Cayman Islands limited liability  company (the  "Investor").  Capitalized
terms used and not defined  herein  shall have the same  meanings as assigned to
them in the Securities Purchase Agreement.

         This letter  agreement is intended to set forth the  understanding  and
agreement  pursuant to which the Company has retained the services of Settondown
Capital  International,  Ltd.  ("Settondown") to act as the Company's  financial
advisor in connection with a private placement of the Company's securities which
is intended to raise up $2,000,000 (the "Transaction").

         As full  compensation for arranging and assisting with the Transaction,
it is agreed that the Company shall compensate Settondown as follows:

         4. The Company shall pay Settondown a fee equal to five percent (5%) of
the aggregate  amount of the Preferred Stock purchased by the Investor.  The fee
shall be paid on the Closing Date in the form of  Preferred  Stock issued by the
Company to Settondown.

         5. This  letter  agreement  sets  forth the  entire  understanding  and
agreement between  Settondown and the Company with respect to the subject matter
hereof  and  this  Agreement   supersedes   all  prior  and/or   contemporaneous
understandings  and  agreements  with  respect to such subject  matter  (whether
written or oral), all of which are merged herein.

         6.  This  letter  agreement  shall  be  governed  by and  construed  in
accordance  with the laws of the State of New  York,  without  reference  to its
conflicts of laws provisions. This letter

                                       E-5

<PAGE>


agreement  may not be amended,  modified or waived,  except by an  instrument in
writing duly executed by the Company and Settondown.

         Please  evidence your  concurrence  to the terms and provisions of this
letter  agreement,  by executing  and returning the enclosed copy of this letter
agreement.

                                                     Very truly yours,

                                                     XYBERNAUT CORPORATION


                                                     By:________________________
                                                         Name:  Steven Newman
                                                         Title:   Vice Chairman

Agreed and Accepted:

SETTONDOWN CAPITAL INTERNATIONAL,
   LTD.


By:______________________________
         Name:
         Title:


                                       E-6




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