DSET CORP
S-8, 1999-12-08
COMPUTER PROGRAMMING SERVICES
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                    As filed with the Securities and Exchange
                         Commission on December 8, 1999
                                                    Registration No. 333-

- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                DSET CORPORATION
- --------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in its Charter)

                                 1160 US Highway 22 East
         New Jersey           Bridgewater, New Jersey 08807       22-3000022
- ----------------------------  -----------------------------  ------------------
(State or Other Jurisdiction   (Address of Principal         (I.R.S. Employer
of Incorporation or             Executive Offices)           Identification No.)
Organization)                        (Zip Code)

                             1993 Stock Option Plan
                                 1998 Stock Plan
- --------------------------------------------------------------------------------
                            (Full Title of the Plans)

                             William P. McHale, Jr.
                             Chief Executive Officer
                                DSET Corporation
                             1160 US Highway 22 East
                          Bridgewater, New Jersey 08807
- --------------------------------------------------------------------------------
                              (Name and Address of
                               Agent for Service)

                                 (908) 526-7500
- --------------------------------------------------------------------------------
                     (Telephone Number, Including Area Code,
                              of Agent for Service)

                                    Copy To:

                              Tod K. Reichert, Esq.
                   Buchanan Ingersoll Professional Corporation
                              650 College Road East
                               Princeton, NJ 08540
                                 (609) 987-6800



<PAGE>
<TABLE>

                         CALCULATION OF REGISTRATION FEE
===================================================================================================
<CAPTION>
                                                      Proposed         Proposed
                                     Amount            Maximum          Maximum         Amount of
     Title of Securities            to be          Offering Price      Aggregate      Registration
      to be Registered           Registered (1)     Per Share        Offering Price        Fee
- ---------------------------------------------------------------------------------------------------
<S>                                <C>                 <C>            <C>                  <C>
Common Stock, no par value
    per share:

Shares issued or to be issued
    pursuant to prior option
    grants under the 1993
    Stock Option Plan              2,887,689           $3.21(2)       $9,269,482(2)        $2,448
- ---------------------------------------------------------------------------------------------------

Shares to be issued pursuant
    to prior option grants
    under the 1998 Stock Plan      1,238,371          $12.64(3)      $15,653,010(3)        $4,133
- ---------------------------------------------------------------------------------------------------
Shares to be issued pursuant
    to future option grants
    under the 1998 Stock Plan        561,629          $22.40(4)      $12,580,490(4)        $3,322
- ---------------------------------------------------------------------------------------------------
Total:                             4,687,689                         $37,502,982           $9,903
===================================================================================================
</TABLE>
- ---------------

(1)  For the sole purpose of  calculating  the  registration  fee, the number of
     shares  under this  Registration  Statement  has been  divided  among three
     subtotals.

(2)  Pursuant to Rule 457(h),  these prices are calculated based on the weighted
     average exercise price of $3.21 per share covering 2,887,689 shares subject
     to stock options granted under the 1993 Stock Option Plan.

(3)  Pursuant to Rule 457(h),  these prices are calculated based on the weighted
     average  exercise  price of $12.64  per  share  covering  1,238,371  shares
     subject to stock options granted under the 1998 Stock Plan.

(4)  Pursuant to Rule 457(h) and 457(c),  these prices are estimated  solely for
     the  purpose of  calculating  the  registration  fee and are based upon the
     average of the bid and asked  prices of DSET's  Common  Stock on the Nasdaq
     National Market on December 6, 1999.

        Pursuant to Rule 416 under the Securities Act of 1933, as amended,  this
Registration  Statement also covers an indeterminate  number of shares as may be
issued as a result of the anti-dilution provisions of the Plans.



                                       ii
<PAGE>

                                EXPLANATORY NOTE

     This Registration Statement contains two parts:

     The first part contains a Reoffer Prospectus (the "Prospectus") prepared in
accordance with the  requirements  of Part I of Form S-3. The Prospectus  covers
reoffers  and  resales  of shares of common  stock,  no par value  (the  "Common
Stock"),  of DSET  Corporation  ("DSET") by: (i) all affiliates (as such term is
defined under Rule 405 of the  Securities  Act of 1933, as amended) of DSET with
respect to options  granted  prior to the date  hereof  pursuant  to DSET's 1993
Stock Option Plan and DSET's 1998 Stock Plan (collectively,  the "Plans");  (ii)
all  non-affiliates who hold less than 1,000 shares pursuant to option exercises
under the Plans prior to the date hereof; and (iii) certain other non-affiliates
listed on the Selling Shareholder table herein.

     The  second  part  contains   "Information  Required  in  the  Registration
Statement"  pursuant to Part II of Form S-8 with respect to option  exercises by
non-affiliates pursuant to the Plans subsequent to the date hereof.






                                      iii
<PAGE>

                                   PROSPECTUS


                  S-3 Reoffer Prospectus dated December 8, 1999

                                DSET CORPORATION

                        2,887,689 Shares of Common Stock
               Issued or Issuable under the 1993 Stock Option Plan
                        1,800,000 Shares of Common Stock
                       Issuable under the 1998 Stock Plan


     This  Prospectus  relates  to the  public  resale,  from  time to time,  of
4,687,689  shares of our Common  Stock (the  "Shares")  by certain  shareholders
identified  below in the section  entitled  "The  Selling  Shareholders."  These
Shares have been or may be acquired upon the exercise of stock  options  granted
pursuant  to our 1993 Stock  Option Plan or 1998 Stock Plan  (collectively,  the
"Plans").  Options or shares of Common  Stock also may be issued  under the 1998
Stock  Plan  in  amounts  and  to  persons  not  presently  known  by  us.  Such
information, when known, may be included in an amendment to this Prospectus.

     We will not  receive  any of the  proceeds  from  the  sale by the  Selling
Shareholders of the Shares covered by this Prospectus.

     We have not entered into any  underwriting  arrangements in connection with
the sale of  Shares.  The  Shares  may be sold from time to time by the  Selling
Shareholders or by permitted  pledgees,  donees,  transferees or other permitted
successors in interest and may be made on the Nasdaq  National  Market at prices
and at terms then  prevailing  or at prices  related to the then current  market
price, or in negotiated transactions.

     Our Common Stock is traded on the Nasdaq  National  Market under the symbol
"DSET." On December 6, 1999,  the closing  sale price of our Common Stock on the
Nasdaq National Market was $22.3125 per share.

INVESTING IN THE COMMON STOCK INVOLVES A HIGH DEGREE OF RISK. SEE "RISK FACTORS"
                              BEGINNING ON PAGE 5.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or disapproved of 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 December 8, 1999.



<PAGE>

                          PROSPECTUS TABLE OF CONTENTS

                                                                            Page
                                                                            ----
Special Note Regarding Forward-Looking Information..........................  3
DSET Corporation............................................................  3
Risk Factors................................................................  5
      Substantial Variability of Quarterly Operating Results................  5
      Dependence on Rapidly Evolving Telecommunications Industry............  6
      Dependence on the TMN Industry Standard...............................  6
      Rapid Technological Change............................................  7
      Management of Growth..................................................  7
      Risks Associated with International Operations........................  7
      Possibility of Over-runs on Fixed-Price Contracts and Other
          Project Risks.....................................................  8
      Limited Protection of Proprietary Rights and Enforcement of
          Licensing Rights..................................................  8
      Competitive Market for Technical Personnel............................  9
      Risks Associated with New Application Development Tools and
          Carrier-to-Carrier Applications................................... 10
      Risks of Product Defects.............................................. 10
      Dependence on Key Personnel........................................... 10
      Length of Sales Cycle................................................. 11
      Intense Competition................................................... 11
      Customer Concentration................................................ 12
      Risks Associated with Indirect Sales Channels......................... 13
      Risks Associated with Year 2000 Problem............................... 13
      Government Regulations and Legal Uncertainties........................ 15
      Risks Relating to Potential Acquisitions.............................. 16
      Possibility of Volatility of Stock Prices............................. 16
      Anti-Takeover Effect of Certain Charter and By-Law and Other
          Provisions........................................................ 16
Use of Proceeds............................................................. 17
The Selling Shareholders.................................................... 17
Plan of Distribution........................................................ 21
Legal Matters............................................................... 22
Experts..................................................................... 22
Information Incorporated by Reference....................................... 22
Where You Can Find More Information......................................... 23
Indemnification of Directors and Officers................................... 23


                                     - 2 -
<PAGE>

               SPECIAL NOTE REGARDING FORWARD-LOOKING INFORMATION

     This   Prospectus   and   the   documents   incorporated   herein   contain
forward-looking statements. For this purpose, any statements contained herein or
incorporated   herein  that  are  not  statements  of  historical  fact  may  be
forward-looking  statements.  For example,  the words "may," "will," "continue,"
"believes,"  "expects,"  "anticipates,"  "intends,"  "estimates,"  "should"  and
similar expressions are intended to identify forward-looking  statements.  There
are a number of  important  factors  that could cause  DSET's  results to differ
materially  from  those  indicated  by such  forward-looking  statements.  These
factors include those set forth below in the section entitled "Risk Factors." In
particular,  DSET's  statements  relating  to the Year  2000  compliance  of its
products   and   internal   systems   are   forward-looking   statements.   Such
forward-looking statements also involve risks and uncertainties,  including, but
not limited to: (i) DSET's dependence on the rapidly evolving telecommunications
industry in general,  and the local exchange carrier market in particular;  (ii)
DSET's dependence on the Telecommunications  Management Network ("TMN") industry
standard;  (iii)  rapid  technological  change in DSET's  industry;  (iv)  risks
associated  with  the  development  and  marketing  of new  products,  including
carrier-to-carrier  applications,  such as Local  Number  Portability  Solutions
("LNP") or operational  support systems ("OSS")  gateways;  (v) risks associated
with   acquisitions   of  businesses  by  DSET,   including  risks  relating  to
unanticipated  liabilities  or expenses or lower than expected  revenues of such
acquired businesses; and (vi) risks and variables,  including engineering costs,
associated with the remediation of certain of DSET's products which are not Year
2000  compliant.  The success of DSET depends to a large  degree upon  increased
utilization  of  its  carrier-to-carrier   applications,  such  as  LNP  or  OSS
interconnection  gateways, by telecommunications  carriers and network equipment
vendors,  the buying patterns of competitive local exchange  carriers  ("CLECs")
and  the  continued  demand  for  application   development   tools  and  custom
application development services. As a result of such risks and others expressed
from time to time in DSET's filings with the Securities and Exchange  Commission
(the  "SEC"),  DSET's  actual  results  may differ  materially  from the results
discussed in or implied by the forward-looking statements contained herein.

                                DSET CORPORATION

     We design,  develop,  market and support software  solutions for the global
telecommunications   marketplace.  Our  suite  of  electronic  bonding  gateways
interconnects the OSSs of competing telecommunications providers that must trade
information and share network capabilities to serve customers.  In addition, our
LNP   solutions   also  play  a  key  role  in  enabling   customers  to  change
telecommunications service providers without changing their local phone numbers.
The  Telecommunications  Act of 1996 encourages  competition  among providers of
local  phone  services  by  requiring  the  incumbent  regional  Bell  operating
companies  to allow CLECs to lease  portions  of the  incumbents'  networks  and
access  their OSSs.  As a result,  hundreds of CLECs are vying to win  customers
from the incumbents by offering better pricing and service.  With our solutions,
CLECs can complete key tasks that assist "provisioning" or "service fulfillment"
of phone service for new customers in days rather than weeks.  In addition,  our
solutions  help CLECs  maintain a higher  level of quality of service  for their
customers.





                                     - 3 -
<PAGE>

     The majority of our revenues are now  generated  from two sources:  license
and service  revenues  from CLECs and license and service  revenues from network
equipment  vendors.  Until  1999,  substantially  all of our  revenues  had been
derived from  applications  and suites of tools that could be distributed  among
many  processors  in order to  solve  highly  complex  problems  in the  network
management area which we generally sold to network equipment vendors.

     Our success  will  depend on  continued  growth in the market for  advanced
telecommunications   products  and  services  such  as  LNP  solutions  and  OSS
interconnect products.

     We are a New  Jersey  corporation.  Our  principal  executive  offices  are
located at 1160 US  Highway 22 East,  Bridgewater,  New  Jersey  08807,  and our
telephone number is (908) 526-7500.  In this Prospectus,  the terms "DSET," "the
Company," "we," "us" and "our" includes DSET Corporation and its subsidiaries.





                                     - 4 -
<PAGE>

                                  RISK FACTORS

     In  addition  to the  other  information  in this  Prospectus,  you  should
carefully  consider the following factors in evaluating whether to invest in the
Shares. The risks and uncertainties described below are not the only ones facing
our Company.  Additional  risks and  uncertainties  not presently known to us or
that we currently deem  immaterial  may also impair our business  operations and
financial results.

     If any of the following  risks  actually  occur,  our  business,  financial
condition or results of operations could be materially  adversely  affected.  In
such case,  the trading price of our Common Stock could decline and you may lose
all or part of your investment.

     This Prospectus also contains forward-looking statements that involve risks
and  uncertainties.  Our  actual  results  could  differ  materially  from those
anticipated in the  forward-looking  statements as a result of certain  factors,
including the risks described below and elsewhere in this Prospectus.

SUBSTANTIAL VARIABILITY OF QUARTERLY OPERATING RESULTS

     Our  revenue,  gross  profit,  operating  income  and net  income  may vary
substantially from quarter to quarter due to a number of factors.  Many factors,
some of which are not within our control,  may  contribute  to  fluctuations  in
operating results. These factors include the following:

     o  Timing and levels of hardware and software purchases by customers;

     o  Timing, size and stage of application development projects;

     o  New product and service introductions by us or our competitors;

     o  Seasonal impact on projects for customers;

     o  Our hiring patterns;

     o  Costs associated with fixed-price contracts;

     o  Market  factors  affecting  the  availability  or  costs  of   qualified
        technical personnel;

     o  Timing and customer acceptance of our new product and service offerings;

     o  Length of sales cycle;

     o  Variations  in run-time  royalty  fees  due to the  size and  timing  of
        network device  deployments by  equipment vendors to  telecommunications
        carriers;

     o  Mix of domestic and international sales;

     o  Costs related to acquisitions of technology or businesses; and

     o  Industry and general economic conditions.

     Historically,  our revenue  growth  generally has been higher in the fourth
quarter due to capital  budgeting  and spending  patterns by our  customers.  We
anticipate  that our  business  will  continue  to be subject  to such  seasonal
variations. In addition, a significant portion of our


                                     - 5 -
<PAGE>

quarterly revenue is recognized in the last month of each quarter.  As a result,
we may not  recognize  any  negative  fluctuations  in  revenue  until late in a
particular quarter.

     Many of our costs,  such as personnel and facilities  costs, are relatively
fixed in nature.  Our expense levels are based in part on expectations of future
revenue.  As a result,  our  operating  results have been and in the future will
continue  to  be  impacted  by  changes  in  technical   personnel  billing  and
utilization  rates.  Technical  personnel  utilization  rates  have been and are
expected  to  continue  to be  adversely  affected  during  periods of rapid and
concentrated  hiring. In addition,  during such periods,  we are likely to incur
greater  technical  training  costs.  Due to these and other factors,  if we are
successful  in  expanding  our  service   offerings  and  revenue,   periods  of
variability in utilization are likely to occur. In addition, our revenues in any
given period are likely to come from a limited  number of customer  engagements.
Any delay in the  closing  of, or the loss of any  number of,  such  engagements
would adversely affect our results of operations.  We believe,  therefore,  that
past operating  results and  period-to-period  comparisons  should not be relied
upon as an indication of future operating performance.

DEPENDENCE ON RAPIDLY EVOLVING TELECOMMUNICATIONS INDUSTRY

     Our  success  depends on the  continued  growth of the market for  advanced
telecommunications  products and services. The global  telecommunications market
is evolving  rapidly and it is difficult to predict its potential size or future
growth rate. We cannot assure you that the global deregulation and privatization
of the  worldwide  telecommunication  market  that  has  resulted  in  increased
competition  and  escalating  demand  for new  technologies  and  services  will
continue in a manner favorable to us or our business strategies.

     Since our customers are  concentrated in the  telecommunications  industry,
our  future   success  is   dependent   upon   increased   utilization   of  our
carrier-to-carrier  applications,  such as local number  portability  ("LNP") or
operational    support   systems   ("OSS")    interconnection    gateways,    by
telecommunications  carriers and network equipment vendors,  the buying patterns
of competitive  local exchange  carriers  ("CLECs") and the continued demand for
application  development  tools  and  custom  application  services.  We  cannot
guarantee  that  our  current  or  future  products  or  services  will  achieve
acceptance among  telecommunications  carriers,  network  equipment  vendors and
other  potential  customers or that these  customers will not adopt  alternative
architectures or technologies that are incompatible with our technologies.

     In addition,  we cannot  assure you that  telecommunications  carriers will
upgrade  the  infrastructure  of  their  networks  necessitating  the use of new
network  devices  which  require  applications  developed  with our  products or
services. Industry-wide network improvements driving the demand for our products
or services may be delayed or prevented by a variety of factors, including cost,
regulatory  obstacles,  the lack or  reduction  of consumer  demand for advanced
telecommunications services and alternative approaches to service delivery.

DEPENDENCE ON THE TMN INDUSTRY STANDARD

     Until 1999,  substantially  all of our  revenue  had come from  application
development   tools  and   application   development   services   based  on  the
Telecommunications Management Network



                                     - 6 -
<PAGE>

("TMN") standard.  A substantial  portion of our ongoing revenue will still come
from these  applications.  We depend upon the broad and  continued  adoption and
deployment of TMN as the industry  standard  architecture  for managing  complex
telecommunications  networks.  Telecommunications  carriers  have only  recently
widely  embraced TMN  solutions as an industry  standard.  In order to remain an
industry  standard,  TMN must  continue  to be adapted to  accommodate  emerging
technologies,  such as CORBA and Java.  We believe that the continued use of TMN
solutions  will  also  depend,   in  part,   upon  the  continued   demand  from
telecommunications    carriers   and   equipment    vendors   to   quickly   and
cost-effectively  implement  TMN  solutions.  It is  uncertain  whether TMN will
remain a standard for the management of complex telecommunications networks. The
introduction of new or more favorable  industry  standards,  or our inability to
recognize and quickly adapt to new  standards,  would  materially  and adversely
affect our business, financial condition and results of operations.

RAPID TECHNOLOGICAL CHANGE

     The market for telecommunications  devices,  network-based applications and
related services is subject to rapid  technological  change.  Evolving  industry
standards, changes in end-user requirements and frequent new product and service
introductions  and  upgrades may render our existing  offerings  obsolete.  As a
result,  our  position  in this  market  could  be  negatively  impacted  due to
unforeseen changes in product features and functions of competing products.  Our
growth and future  results of  operations  will depend in part on our ability to
respond to these changes by enhancing our existing  products and services and by
developing and introducing,  on a timely and cost-effective basis, new products,
features and related  services to meet or exceed  technological  advances by our
competitors.  We cannot  guarantee  that we will be successful  in  identifying,
developing and marketing new products, product enhancements and related services
necessary to keep pace with technological change.

MANAGEMENT OF GROWTH

     Recent  growth  has  placed,  and is  expected  to  continue  to  place,  a
significant strain on our managerial,  operational and technical resources.  Our
ability to manage growth effectively will require us to continue  developing and
improving our operational,  financial and other internal systems, as well as our
business development capabilities, and to attract, hire, train, retain, motivate
and manage our  employees.  We must be able to allocate  sufficient  engineering
resources to develop new products as well as maintain and improve the quality of
our  current  offerings.  In  addition,  our future  success in the  application
development  services component of our business will depend in large part on our
ability to continue to maintain high rates of employee utilization at profitable
billing  rates and to maintain  project  quality,  particularly  if the size and
scope of our development  projects  increase.  The failure to manage our growing
employee  base,  improve  our  operating  systems  or  add  resources  on a cost
effective basis could have a material adverse effect on our business.

RISKS ASSOCIATED WITH INTERNATIONAL OPERATIONS

     We rely on a number of third  party  distributors  and agents to market and
sell our products and services  outside of North  America.  We cannot assure you
that our distributors or agents will



                                     - 7 -
<PAGE>

provide  the effort and  support  necessary  to  service  international  markets
effectively. We intend to expand our existing international operations and enter
new international  markets,  which will demand significant  management attention
and financial commitment. Our management has limited experience in international
operations,  and we  cannot  guarantee  that we  will  successfully  expand  our
international  operations,  which  could have a material  adverse  effect on our
business, financial condition and results of operations.

     Our international sales currently are United States dollar-denominated.  As
a result,  an  increase  in the value of the United  States  dollar  relative to
foreign  currencies  could make our products and services  less  competitive  in
international markets. Furthermore,  operating in international markets subjects
us to additional risks, including unexpected changes in regulatory requirements,
political  and  economic   conditions,   taxes,   tariffs  or  other   barriers,
difficulties  in  staffing  and  managing  international  operations,  potential
exchange and repatriation controls on foreign earnings, longer sales and payment
cycles  and  difficulty  in  accounts  receivable  collection.   Volatility  and
devaluation  trends in certain Asian  markets,  particularly  South Korea,  have
resulted in delays, cancellations and increased pricing pressures on our product
sales and  application  development  activities in such markets.  Such risks may
adversely affect our business, financial condition and results of operations.

POSSIBILITY OF OVER-RUNS ON FIXED-PRICE CONTRACTS AND OTHER PROJECT RISKS

     An increasing  portion of our total revenue is generated  from  application
development  projects,  system installations and service contracts provided on a
fixed-price basis with performance and payment  milestones rather than contracts
billed on a  time-and-materials  basis.  We bear the risk of cost  over-runs and
inflation in connection with fixed-price  projects.  If we fail to: (i) estimate
accurately  the resources and time required for a fixed-price  project,  or (ii)
complete the services within the time frame committed,  our business and results
of operations could suffer.

LIMITED PROTECTION OF PROPRIETARY RIGHTS AND ENFORCEMENT OF LICENSING RIGHTS

     Our success and ability to compete effectively is dependent,  in part, upon
our  proprietary  rights.  We rely  primarily  on a  combination  of  copyright,
trademark,  patent and trade secret laws, as well as confidentiality  procedures
and contractual  restrictions,  to establish and protect our proprietary rights.
Furthermore,  we  generally  enter  into  non-competition,   non-disclosure  and
invention  assignment  agreements with our employees and  consultants,  and into
non-disclosure agreements with our customers and distributors.  We cannot assure
you that these measures will be adequate to protect our proprietary rights.

     We may also be subject to further  risks as we enter into  transactions  in
countries  where  intellectual  property  laws  are not  well  developed  or are
difficult  to  enforce.  Legal  protections  of our  proprietary  rights  may be
ineffective  in other  countries.  Litigation  may be  necessary  to defend  and
enforce our  proprietary  rights,  which could result in  substantial  costs and
diversion of management  resources and could have a material  adverse  effect on
our business,  financial condition and results of operations,  regardless of the
final outcome of such litigation.  Despite our efforts to safeguard and maintain
our proprietary rights both in the United States and abroad,


                                     - 8 -
<PAGE>

there is no guarantee  that we will be successful in doing so.  Furthermore,  we
cannot  assure  you  that  the  steps  taken  by us will be  adequate  to  deter
misappropriation or independent  third-party development of our technology or to
prevent an  unauthorized  third party from  copying or otherwise  obtaining  and
using our  products or  technology.  Any of these  events  could have a material
adverse effect on our business, financial condition and results of operations.

     We, or our  employees,  may  become  subject to claims of  infringement  or
misappropriation of the intellectual  property rights of others. In addition, in
our licenses and software development and distribution  agreements,  we agree to
indemnify  our  customers  and  distributors  for any expenses  and  liabilities
resulting from claimed infringements of patents, trademarks, copyrights or other
proprietary rights of third parties. The amount of our indemnity obligations may
be greater than the revenue we may have  received  under these  development  and
distribution agreements. We cannot assure you that third parties will not assert
infringement   or   misappropriation   claims   against  us,  our  customers  or
distributors  in the future with  respect to our  employees or current or future
products or services. Any claims or litigation,  with or without merit, could be
time-consuming,  result in costly  litigation,  cause product shipment delays or
require us to enter into royalty or licensing arrangements. Royalty or licensing
arrangements,  if necessary,  may not be available on terms acceptable to us, if
at all, which could have a material  adverse  effect on our business,  financial
condition and results of operations.

     A portion of our revenues are generated  from  run-time  royalty fees which
generally   become   due  upon  the   deployment   by   equipment   vendors   to
telecommunications  carriers of network devices which have embedded applications
built with our software.  Many of our customers  are  contractually  required to
periodically  report  the sales of these  network  devices  to us.  Although  we
generally have the right to periodic  audits in our contracts  which provide for
run-time  royalties,  we cannot  assure you that our customers  will  accurately
report  their sales or that we will be able to  effectively  monitor and enforce
our contractual rights with respect to run-time royalty fees.

COMPETITIVE MARKET FOR TECHNICAL PERSONNEL

     Our  future  success  depends  to a  significant  extent on our  ability to
attract,  hire,  train,  retain  and  motivate  qualified  technical  and  sales
personnel, with appropriate levels of managerial and technical capabilities. Our
complex  technology  generally  requires a  significant  level of  expertise  to
effectively  develop and market our  products  and  services  and to perform our
custom application  development  services.  We believe that there is a worldwide
shortage of, and significant  competition for,  professionals  with the advanced
skills we require.  We have at times  experienced,  and continue to  experience,
difficulty in recruiting qualified personnel.  Recruiting qualified personnel is
an intensely  competitive and time-consuming  process.  We compete for personnel
with software  companies and  telecommunications  companies,  many of which have
greater resources. This makes it difficult for us to hire the quality and number
of  technical  and sales  personnel we require.  In  addition,  it makes it more
expensive to hire those personnel we can attract.  Due to this  competition,  we
have  experienced,  and expect to continue to experience,  turnover in technical
and  sales  personnel.  There  is no  guarantee  that we will be  successful  in
attracting  and retaining the technical or sales  personnel  required to conduct
and successfully  expand our operations.  Our business,  financial condition and
results of operations could be


                                     - 9 -
<PAGE>

materially  adversely affected if we are unable to attract,  hire, train, retain
and motivate qualified technical and sales personnel.

RISKS ASSOCIATED WITH NEW CARRIER-TO-CARRIER APPLICATIONS

     As part of our strategy,  we expect to continue developing and offering new
carrier-to-carrier  applications,  such as LNP Solutions and OSS interconnection
gateway  products.  We  cannot  assure  you  that  our  new   carrier-to-carrier
applications   will   adequately   meet  evolving   technological   or  customer
requirements  and  emerging  industry  standards.   Our  new  carrier-to-carrier
applications  are in the early  stages of  development,  marketing  and customer
acceptance, and we have limited experience in developing, marketing or providing
new  applications.  Accordingly,  we cannot  guarantee  that the  market for new
carrier-to-carrier  applications will develop. Furthermore, we cannot assure you
that we will successfully market our new carrier-to-carrier  applications to new
and existing customers, or meet customer expectations.

     We have,  from time to time,  experienced  delays in the development of new
products  and the  enhancement  of existing  products,  and we may in the future
experience delays in the development of new carrier-to-carrier applications, due
to resource  constraints or  technological  or other  reasons.  Our inability to
develop and introduce new  applications in a timely manner could have a material
adverse effect on our business, financial condition and results of operations.

RISKS OF PRODUCT DEFECTS

     Application development tools and applications developed, licensed and sold
by us may  contain  errors or  failures.  We  cannot  guarantee  that  errors or
failures will not be found in our products or  applications  or, if  discovered,
that we will be able to successfully  correct any errors or failures in a timely
manner or at all.  The  occurrence  of errors or  failures in our  products  and
applications  could result in loss of or delay in market  acceptance,  increased
service and  warranty  costs or payment of  compensatory  or other  damages.  In
addition,  errors or failures may result in delays in our recognition of revenue
and  diversion of our  engineering  resources  during the period in which we are
required  to correct  any  defects.  We do not  maintain  errors  and  omissions
insurance  to cover  liability  associated  with our  software  development  and
license agreements. Although our agreements with our customers typically contain
provisions  intended to limit our  exposure to  potential  claims as well as any
liabilities  arising from such claims,  our contracts with our customers may not
effectively  protect us against the  liabilities  and expenses  associated  with
software errors or failures.  Accordingly, errors or failures in our products or
applications  could have a material adverse effect upon our business,  financial
condition and results of operations.

DEPENDENCE ON KEY PERSONNEL

     Our  success  to  date,  and our  future  success  depends  largely  on the
continued service of our management,  key product and application engineers, and
sales and technical sales support  personnel as well as our ability to identify,
hire and retain  additional senior  personnel.  We face intense  competition for
qualified personnel,  and we cannot be certain that we will successfully attract
and  retain  additional  qualified  personnel  in the  future.  The  loss of the
services of one or



                                     - 10 -
<PAGE>

more of our key  individuals  or the  failure to attract  and retain  additional
qualified personnel could substantially damage our business.  In addition, if we
were to lose any key  personnel,  we cannot  assure you that we would be able to
prevent the unauthorized disclosure or use of our technical knowledge, practices
or procedures.

LENGTH OF SALES CYCLE

     We believe that the period of time  between  initial  customer  contact and
execution of a license  agreement or application  development  services contract
typically  ranges  from four to nine  months.  Telecommunications  carriers  and
network  equipment  vendors  typically  conduct  extensive  and lengthy  product
evaluations before purchasing software or application  development services. The
sales cycle for CLECs is approximately three to four months. We do not typically
receive  advance notice of changes in the budgets and  purchasing  priorities of
telecommunications equipment vendors and their carrier customers. Curtailment or
termination of custom application  development  projects,  decreases in customer
budgets  or  reduction  in  the  purchasing  priority  assigned  to  application
development,  particularly if significant and  unanticipated by us, could have a
material  adverse  effect on our  business,  financial  condition and results of
operations. Our customers may also encounter delays in the sales cycles of their
products and services which depend on the  implementation of applications  built
using our software,  which may  indirectly  and  adversely  impact our business,
financial condition and results of operations.

INTENSE COMPETITION

     We compete in rapidly changing  markets that are intensely  competitive and
involve changing technologies, evolving industry standards, frequent new product
introductions  and rapid  changes in  customer  requirements.  We compete in the
application  development  tools market with other software tool  providers.  Our
competitors in the markets for application  development  services and electronic
bonding gateways include the in-house  development staffs of  telecommunications
carriers, network equipment vendors and systems integrators.  In addition, there
are new  companies  building  electronic  bonding  gateways  which include other
software vendors and companies providing order management  systems.  Many of our
current and potential competitors have longer operating histories,  greater name
recognition,   larger  or  captive  customer  bases  and  significantly  greater
financial,  technical,  sales, customer support,  marketing and other resources.
Furthermore,  TMN,  as an open  systems  architecture,  can  lead  to  increased
competition as third parties develop competitive products and services.

     We believe  the  principal  competitive  factors  affecting  the market for
application development tools are:

     o    Product reputation;

     o    Quality;

     o    Performance;

     o    Price;



                                     - 11 -
<PAGE>

     o    Customer support; and

     o    Product  features  such  as  adaptability,  scalability,  ability   to
          integrate with other products, functionality and ease of use.

     We believe the principal  competitive factors in the market for application
development services include:

     o    Compliance with industry standards;

     o    Quality of service and deliverables;

     o    Speed of development and implementation;

     o    Price;

     o    Project management capability; and

     o    Technical and business expertise.

     We believe the principal  competitive  factors in the market for electronic
bonding  gateways include many of the same factors as the market for application
development  services as well as the ability of such  applications to facilitate
the  flow-through  of information  between  carriers'  networks and systems.  We
cannot  guarantee  that we will be able to  compete  effectively  based on these
competitive  factors.  To  remain  competitive,  we must  respond  promptly  and
effectively to the challenges of technological  change,  evolving  standards and
our  competitors'  innovations by continuing to enhance our offerings and expand
our sales channels.

CUSTOMER CONCENTRATION

     We  anticipate  that our  results of  operations  in any given  period will
continue  to depend to a  significant  extent  upon  sales to a small  number of
customers. As a result of this customer concentration,  our revenue from quarter
to quarter and business,  financial  condition and results of operations  may be
subject to substantial period-to-period fluctuations. In addition, our business,
financial  condition  and results of operations  could be  materially  adversely
affected  by  the  failure  of  customer  orders  to  materialize  as  and  when
anticipated,   or  by  deferrals  or  cancellations   of  existing   application
development  projects.  Other than certain agreements which provide for on-going
maintenance  revenues or minimum  royalties for run-time  licenses,  none of our
customers have entered into an agreement  requiring  on-going minimum  purchases
from us.  Our  application  development  services  agreements  generally  can be
terminated by our customers with limited advance notice and without  significant
penalty.  Many of our  principal  customers may also be  competitors.  We cannot
assure you that our principal  customers  will continue to purchase  products or
services  from us at current  levels,  if at all.  The loss of one or more major
customers  could  have a  material  adverse  effect on our  business,  financial
condition and results of operations.

                                     - 12 -
<PAGE>

RISKS ASSOCIATED WITH INDIRECT SALES CHANNELS

     In order to expand our international sales efforts,  we have utilized,  and
expect to continue to utilize,  third-party  distributors and agents.  We cannot
guarantee that any existing or future  distributors will not become competitors.
Furthermore,  selling  through  indirect  channels  may  limit  our  information
concerning  the volume of products sold by our customers to end-users and impede
our contact  with  end-users.  As a result,  our  ability to  forecast  revenues
accurately,  evaluate  end-user  satisfaction  and recognize  emerging  end-user
requirements  may  be  hindered.   Moreover,   we  have  limited  experience  in
establishing and maintaining indirect distribution channels and we cannot assure
you that we will do so successfully.  Additionally,  any failure by our existing
and future distributors to generate  significant  revenues could have a material
adverse effect on our business, financial condition and results of operations.

RISKS ASSOCIATED WITH YEAR 2000 PROBLEM

     Assessment. We believe our exposure to Year 2000 problems lies primarily in
the  following  areas:  (i) our own internal  operating  systems;  (ii) our tool
suites,  custom  applications  and  pre-built  electronic  bonding  gateways and
network management applications; and (iii) systems of third parties with whom we
have material  relationships.  We have completed our assessment  with respect to
our  internal  operating  systems and tool  suites.  We continue to evaluate our
exposure with respect to certain custom  applications and our relationships with
third parties.  While the costs of these assessment  efforts are not expected to
be material to our financial  condition or any year's results of operations,  we
cannot assure you that this will be the case.

     Internal  Operating  Systems.  We believe our internal  operating  computer
systems and management information system are currently Year 2000 compliant, and
we do not believe that there will be future  significant costs related to future
maintenance of such compliance.

     Tool  Suites and  Pre-Built  Applications.  We have  conducted  an internal
review and believe that our tool suites (and applicable updates) developed after
May 27,  1997  have been  tested  and are Year 2000  compliant.  These  products
include:

               PRODUCT NAME                         VERSION
               ------------                         -------
               ASN.C/C++                            3.5.3 and later
               Agent Tester                         2.0.1 and later
               CMIP Translator                      1.0.1 and later
               Distributed Systems Generator        4.2.0 and later
               GDMO Agent Emulator                  2.0.0 and later
               GDMO Agent Toolkit                   2.0.0 and later
               GDMO Compiler                        3.0.0 and later
               LNP Test Extensions                  2.0.0 and later



                                     - 13 -
<PAGE>

               PRODUCT NAME                         VERSION
               ------------                         -------
               Manager Code Generator               1.0.4 and later
               Manager Toolkit                      1.0.0 and later
               Marben OSIAM Stack                   2.6f/2.6g and later
               Visual Agent Builder                 1.0.0 and later
               LSMS                                 2.0.1 and later

     Our  pre-built   electronic   bonding   gateways  and  network   management
applications  have been tested for Year 2000  compliance.  All  modifications to
these applications are analyzed for Year 2000 compliance prior to their release.

     Custom  Applications.  In November 1998, we determined  that certain custom
applications  developed and delivered to  approximately  ten customers  were not
Year 2000  compliant.  All of these  customers  were  notified of such Year 2000
compliance  status in November  1998.  We have also analyzed the extent to which
any of the affected custom  applications were integrated by customers into other
products  which may expose us to claims  from our  customers.  We have agreed to
assist each of these customers with any and all remediation  solutions  required
to achieve Year 2000 compliance with our products.  To date, our remediation has
not significantly or materially  adversely affected our financial  condition and
results of operations.  We have incurred certain remediation expenses related to
such  compliance,   pursuant  to  the  warranty  provisions  of  the  applicable
agreements. A failure to properly implement any correction, or problems with any
correction,  could cause  errors in  customers'  products  which may  materially
impact the functionality of those products.

     Third Party Relationships. We are dependent on various third party software
and hardware vendors and suppliers. We are also dependent on third party service
providers and partners such as telephone companies,  banks,  insurance carriers,
auditors and  marketing  partners.  The failure of such third parties to deliver
Year 2000  compliant  products or to  remediate  their  internal  systems  could
jeopardize our ability to meet our obligations to our customers. As a result, we
are presently  conducting inquiries of our outside vendors,  suppliers,  service
providers and marketing partners to identify and resolve Year 2000 exposure from
third parties. To date, we have identified one company whose product is not Year
2000  certified.  Tests are  planned  to verify  Year 2000  compliance  for this
product. Upon completion of the testing, we will be able to assess such exposure
and financial  impact, if any, should such party fail to be Year 2000 compliant.
Any failure of third parties with whom we have material relationships to resolve
Year 2000  problems in a timely  manner could  materially  affect our  business,
financial condition or results of operations.

     Risks of Our Year 2000  Issues.  We expect to identify and resolve all Year
2000 problems that could  materially  adversely  affect our business,  financial
condition or results of operations.  However, we believe that it is not possible
to determine with complete  certainty  that all Year 2000 problems  affecting us
have been identified or corrected.  Further,  we cannot  accurately  predict how
many  failures  related to the Year 2000  Problem  will  occur or the  severity,
duration



                                     - 14 -
<PAGE>

or financial  consequences of such failures. We believe that the most reasonably
likely worst case Year 2000 scenario  would include a combination of some or all
of the following:

     o    Our  internal   operating   systems  may  fail  or  provide  erroneous
          information.  Such failure  could result in:  reduced  utilization  of
          technical  or  other  personnel;  the  inability  to  timely  generate
          financial  reports and  statements;  and  improper  billing and record
          keeping;

     o    A number of system failures that may require significant efforts by us
          or  our   customers   to  prevent  or  alleviate   material   business
          disruptions; and

     o    Failure in HVAC, lighting, telephone, security and similar systems on
          which we rely.


     Additionally,  we cannot  guarantee  that our products  will not be used by
other companies, or our customers, to build applications which might not be Year
2000  compliant,  or that our products or  applications  built with our products
will not be integrated  by us or our  customers or interact  with  non-compliant
software or other products which may expose us to claims from our customers.

     Costs.  Other than time spent by our personnel,  the costs  associated with
remediating non-compliant custom applications and assessing Year 2000 compliance
issues have not been significant to date. We believe that the continued analysis
of compliance of new releases of products and  evaluation of potential Year 2000
problems will result in aggregate expenditures of less than $100,000.

     Our  Contingency  Plans.  We believe our plans for addressing the Year 2000
Problem  are  adequate.  We do not  believe we will  incur a material  financial
impact from system  failures,  or from the costs  associated  with assessing the
risks of  failure,  arising  from the Year 2000  Problem.  We have  assembled  a
response  team  which  will be on 24 hour call  during the change of 1999 to the
year 2000. Consequently, we do not intend to create a detailed contingency plan.
In the  event  that we do not  adequately  identify  and  resolve  our Year 2000
issues,  the absence of a detailed  contingency  plan may  materially  adversely
affect our business, financial condition and results of operations.

GOVERNMENT REGULATION AND LEGAL UNCERTAINTIES

     While our operations are not directly regulated, our existing and potential
customers  are subject to a variety of United  States and  foreign  governmental
regulations.  These  regulations  may negatively  impact the  telecommunications
industry,  limit the number of potential customers for our products and services
or otherwise have a material adverse effect on our business, financial condition
and  results  of  operations.   Recently  enacted  legislation,   including  the
Telecommunications Act of 1996 (the "Telecommunications  Act"), deregulating the
telecommunications   industry  may  cause  changes  in  the   telecommunications
industry,  including  the  entrance of new  competitors  and  possible  industry
consolidation,  which could in turn reduce our potential customer base, increase
pricing pressures on us, decrease demand for our



                                     - 15 -
<PAGE>

application   development   tools,    application   development   services   and
carrier-to-carrier  applications,   increase  our  cost  of  doing  business  or
otherwise have a material  adverse effect on our business,  financial  condition
and  results of  operations.  Currently  the Federal  Communications  Commission
("FCC")  and  state   authorities  are   implementing   the  provisions  of  the
Telecommunications  Act and  several  of the  decisions  by the  FCC  and  state
authorities are being challenged in court. We cannot predict the extent to which
such  legislation  and related  litigation will affect our current and potential
customers or ultimately affect our business, results of operations and financial
condition.

RISKS RELATING TO POTENTIAL ACQUISITIONS

     As  part  of  our  growth  strategy,   we  intend  to  continue  to  pursue
acquisitions  of businesses or  technologies  to broaden our product and service
offerings,  add technical or sales personnel,  increase our presence in existing
markets,  expand into new geographic markets,  establish strategic relationships
and obtain  desirable  customer  relationships.  If we buy a company or selected
assets  or  technologies,   we  could  have  difficulty   assimilating  acquired
personnel,  operations,  customers or vendors. In addition,  one or more of such
personnel,  customers  or vendors  may decide not to work for or  continue to do
business  with us.  These  difficulties  could  disrupt  our  ongoing  business,
distract our  management  and employees  and increase our expenses.  Although we
conduct due diligence  reviews with respect to all acquisitions  candidates,  we
may not  successfully  identify all  material  liabilities  or risks  related to
potential acquisitions.  Furthermore,  we may have to incur debt or issue equity
securities  to pay for any future  acquisitions,  the issuance of which could be
dilutive to our existing shareholders.

POSSIBILITY OF VOLATILITY OF STOCK PRICES

     The market prices for  securities of technology  companies have been highly
volatile  and  the  market  has   experienced   significant   price  and  volume
fluctuations  that are  unrelated to the  operating  performance  of  particular
companies. Announcements of technological innovations or new products or service
offerings by us or our competitors,  developments concerning proprietary rights,
including patents and litigation matters,  domestic or international  regulatory
developments   affecting  the   telecommunications   industry,   general  market
conditions,  any shortfall in revenues or earnings from expected levels or other
failures by us to meet  expectations  of securities  analysts and other factors,
may have a significant impact on the market price of the Common Stock.

ANTI-TAKEOVER  EFFECT OF CERTAIN CHARTER AND BY-LAW AND OTHER PROVISIONS AND NEW
JERSEY LAW.

     Anti-takeover   provisions   of  New  Jersey  law,   our   Certificate   of
Incorporation  and our By-Laws could make it more difficult for a third party to
acquire  control  of  us,  even  if  such  change  would  be  beneficial  to our
shareholders.  Our  Certificate  of  Incorporation  provides  that our  board of
directors may issue preferred stock with superior rights and preferences without
common  shareholder  approval.  The issuance of  preferred  stock could have the
effect of delaying, deterring or preventing a change in control.


                                     - 16 -
<PAGE>

                                 USE OF PROCEEDS

     DSET will not receive any proceeds  from the sale of the Shares  covered by
this  Prospectus.  While DSET will  receive sums upon any exercise of options by
the Selling  Shareholders,  DSET  currently has no plans for their  application,
other than for general corporate  purposes.  DSET cannot assure that any of such
options will be exercised.

                            THE SELLING SHAREHOLDERS

     The  individuals  listed below (the  "Selling  Shareholders")  have or will
acquire  the  Shares  being  registered  pursuant  to the  exercise  of  options
previously  granted to them by DSET.  The  Shares  may not be sold or  otherwise
transferred by the Selling  Shareholders unless and until the applicable options
are exercised in accordance with their terms.

     The following table sets forth:  (i) the name of each Selling  Shareholder,
whose name is known as of the date of the filing of this Prospectus; (ii) his or
her  position(s),  office  or  other  material  relationship  with  DSET and its
predecessors  or  affiliates,  over the last  three  years;  (iii) the number of
shares of Common Stock owned (or subject to options) by each Selling Shareholder
as of the date of this Prospectus and prior to this offering; (iv) the number of
shares of Common  Stock  which may be offered and are being  registered  for the
account of each Selling  Shareholder by this  Prospectus (all of which have been
or may be  acquired  by the Selling  Shareholders  pursuant  to the  exercise of
options subject to the appropriate vesting of such options);  and (v) the amount
of Common  Stock to be owned by each such  Selling  Shareholder  if such Selling
Shareholder  were to sell all of their  shares of Common  Stock  covered by this
Prospectus.  DSET cannot assure that any of the Selling  Shareholders will offer
for sale or sell  any or all of the  Shares  offered  by them  pursuant  to this
Prospectus.

     In addition, options or shares of Common Stock may be issued under the 1998
Stock  Plan in  amounts  and to  persons  not  presently  known  by  DSET.  Such
information,  when  known,  may be  included  in a  subsequent  version  of this
Prospectus.



                                     - 17 -
<PAGE>
<TABLE>
<CAPTION>
                                                          NUMBER OF
                                                           SHARES/             NUMBER OF
                                                         PERCENTAGE OF         SHARES OF           NUMBER OF
                                                         COMMON STOCK           COMMON              SHARES/
                                                           PRIOR TO           STOCK TO BE         PERCENTAGE OF
                                                        OFFERING (BOTH          OFFERED             COMMON
                                                         HELD DIRECTLY          (OPTION            STOCK OWNED
                                POSITION WITH           OR SUBJECT TO        SHARES HELD +         AFTER THE
      NAME(1)                       DSET                  OPTIONS)(2)        OPTIONS HELD)        OFFERING(3)
- -------------------------     ---------------------     --------------       -------------        -----------
<S>                                                      <C>       <C>          <C>                      <C>
S. Daniel Shia...........     Chairman of the Board      1,090,228/9.7%         1,090,228                0/*
                                and Director
William P. McHale, Jr....     President and CEO            415,850/3.7%           415,400              450/*
Paul Smith...............     Senior Vice President-       313,471/2.8%           153,497          159,974/1.4%
                                Strategic Planning
                                and Product
                                Management
Victor W. Mak............     Chief Technology             218,887/2.0%           218,887                0/*
                                Officer
Vincent J. Sheu..........     Former Vice President-       101,402/*               95,777            5,625/*
                                Carrier Solutions
Bruce M. Crowell.........     Vice President and            78,000/*               78,000                0/*
                                Chief Financial
                                Officer
Phil Cavallo.............     Senior Vice President-       108,500/*              108,500                0/*
                                Sales and Marketing
Hui-Yun Rosanna Yuan.....     Former Director               54,485/*               54,485                0/*
Jacob J. Goldberg........     Director                      25,000/*               25,000                0/*
C. Daniel Yost...........     Director                      25,000/*               25,000                0/*
Andrew D. Lipman.........     Director                      25,000/*               25,000                0/*
John C. Thibault.........     Former Director                8,333/*                8,333                0/*
Paul Lipari..............     Former Chief Financial        80,387/*               54,887           25,500/*
                                Officer
Jeffrey Schneider........     Program Manager               34,821/*               34,821                0/*
Stephen Van Houten.......     Director of Human             30,756/*               29,546            1,210/*
                                Resources
Zenn Wang................     Former Regional Sales         19,800/*               19,800                0/*
                                Manager
Michael Walch............     Director of Accounting        20,500/*               19,500            1,000/*
Ellen Kelley-McHale......     Wife of William               16,005/*               16,005                0/*
                                McHale
Raghav Trivedi...........     Former Project                15,184/*               15,184                0/*
                                Manager
Jon Pask.................     Facility Supervisor,          10,215/*               10,215                0/*
                                New Jersey
Weidong Li...............     Senior Software                7,185/*                7,185                0/*
                                Engineer
</TABLE>

                                     - 18 -
<PAGE>
<TABLE>
<CAPTION>
                                                          NUMBER OF
                                                           SHARES/             NUMBER OF
                                                         PERCENTAGE OF         SHARES OF           NUMBER OF
                                                         COMMON STOCK           COMMON              SHARES/
                                                           PRIOR TO           STOCK TO BE         PERCENTAGE OF
                                                        OFFERING (BOTH          OFFERED             COMMON
                                                         HELD DIRECTLY          (OPTION            STOCK OWNED
                                POSITION WITH           OR SUBJECT TO        SHARES HELD +         AFTER THE
      NAME(1)                       DSET                  OPTIONS)(2)        OPTIONS HELD)        OFFERING(3)
- -------------------------     ---------------------     --------------       -------------        -----------
<S>                                                      <C>       <C>          <C>                      <C>
Neil Fox.................     Former Director of             7,000/*                7,000                0/*
                                Operations
Robert Foley.............     Former Director of             6,010/*                6,010                0/*
                                Professional Services
Ray Li...................     Former Systems                 4,835/*                4,835                0/*
                                Engineer
Felicia Knisely..........     Former Marketing               3,480/*                3,480                0/*
                                Assistant
Yonik Seeley.............     Former Project Leader          3,083/*                3,083                0/*
Shu-Wen Wang.............     Minor Child of Former          3,000/*                3,000                0/*
                                Regional Sales
                                Manager
Shirley Wang.............     Minor Child of Former          3,000/*                3,000                0/*
                                Regional Sales
                                Manager
Victor Wang..............     Minor Child of Former          3,000/*                3,000                0/*
                                Regional Sales
                                Manager
Diane Romano.............     Former Corporate               2,500/*                2,500                0/*
                                Administrative
                                Assistant
Dean Kaflowitz...........     Former Senior                  1,773/*                1,773                0/*
                                Technical Writer
Michael Hui..............     Former Senior                  1,500/*                1,500                0/*
                                Software Engineer
Ellen Kelley-McHale C/F
  Liam McHale............     Minor Child of William         1,250/*                1,250                0/*
                                McHale

Harshwardhan Kulkarni....     Former Member of               1,161/*                1,161                0/*
                                Technical Staff

Brendan McHale...........     Minor Child of William         1,125/*                1,125                0/*
                                McHale
</TABLE>

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

* Less than one percent.

(1)  Certain  unnamed  non-affiliates  of  DSET  may  sell  Shares  held by them
     pursuant to this offering. Each such person, however, holds less than 1,000
     Shares from the exercise of stock options and excluding options to purchase
     additional  shares of Common Stock that each such  individual  may hold, if
     any, at the time of this offering.  All such individuals currently hold, in
     the aggregate, 5,299 Shares, excluding unexercised options held by them, if
     any.


                                     - 19 -
<PAGE>

(2)  Applicable  percentage of ownership is based on 10,766,917 shares of Common
     Stock   outstanding  as  of  November  30,  1999,  plus  any  Common  Stock
     equivalents held by such holder.

(3)  Assumes  that all Shares are sold  pursuant  to this  offering  and that no
     other  shares of Common  Stock are  acquired  or disposed of by the Selling
     Shareholders prior to the termination of this offering. Because the Selling
     Shareholders  may sell all,  some or none of their Shares or may acquire or
     dispose of other shares of Common Stock,  no reliable  estimate can be made
     of the  aggregate  number of  Shares  that  will be sold  pursuant  to this
     offering or the number or  percentage  of shares of Common  Stock that each
     Selling Shareholder will own upon completion of this offering.


                                     - 20 -
<PAGE>

                              PLAN OF DISTRIBUTION

     The Selling  Shareholders  have not advised DSET of any  specific  plan for
distribution of the Shares offered hereby, but it is anticipated that the Shares
will be sold  from  time to time by the  Selling  Shareholders  or by  permitted
pledgees,  donees,  transferees or other permitted successors in interest.  Such
sales may be made in any of the following manners:

     o    On the  Nasdaq  National  Market (or  through  the  facilities  of any
          national securities exchange or U.S. inter-dealer  quotation system of
          a registered national securities association,  on which the Shares are
          then listed,  admitted to unlisted trading  privileges or included for
          quotation);

     o    In public or privately negotiated transactions;

     o    In transactions involving principals or brokers;

     o    In a combination of such methods of sale; or

     o    Any other lawful methods.

     Although sales of the Shares are, in general, expected to be made at market
prices  prevailing  at the time of sale,  the  Shares may also be sold at prices
related to such  prevailing  market  prices or at negotiated  prices,  which may
differ considerably.

     In  offering  the Shares  covered by this  Prospectus,  each of the Selling
Shareholders  and any  broker-dealers  who  sell  the  Shares  for  the  Selling
Shareholders may be "underwriters" within the meaning of the Securities Act, and
any profits  realized by such Selling  Shareholders and the compensation of such
broker-dealers may be underwriting discounts and commissions.

     Sales  through  brokers may be made by any method of trading  authorized by
any stock exchange or market on which the Shares may be listed,  including block
trading in negotiated transactions. Without limiting the foregoing, such brokers
may act as  dealers  by  purchasing  any or all of the  Shares  covered  by this
Prospectus, either as agents for others or as principals for their own accounts,
and reselling such Shares pursuant to this Prospectus.  The Selling Shareholders
may effect such  transactions  directly,  or  indirectly  through  underwriters,
broker-dealers  or agents acting on their behalf. In connection with such sales,
such  broker-dealers  or  agents  may  receive   compensation  in  the  form  of
commissions,  concessions, allowances or discounts, any or all of which might be
in excess of customary amounts.

     Each of the Selling  Shareholders is acting independently of DSET in making
decisions  with  respect to the timing,  manner and size of each sale of Shares.
DSET has not been advised of any definitive  selling  arrangement at the date of
this Prospectus between any Selling Shareholder and any broker-dealer or agent.

     To the  extent  required,  the  names  of  any  agents,  broker-dealers  or
underwriters and applicable commissions,  concessions,  allowances or discounts,
and any other required  information  with respect to any particular offer of the
Shares  by  the  Selling  Shareholders,  will  be  set  forth  in  a  Prospectus
Supplement.



                                     - 21 -
<PAGE>

     The  expenses  of  preparing  and filing  this  Prospectus  and the related
Registration  Statement  with the SEC will be paid  entirely by DSET.  Shares of
Common Stock covered by this  Prospectus also may qualify to be sold pursuant to
Rule 144 under the Securities Act, rather than pursuant to this Prospectus.  The
Selling  Shareholders  have been advised that they are subject to the applicable
provisions of the  Securities  Exchange Act of 1934,  as amended (the  "Exchange
Act"), including without limitation, Rule 10b-5 thereunder.

     Neither DSET nor the Selling  Shareholders can estimate at the present time
the amount of commissions or discounts, if any, that will be paid by the Selling
Shareholders on account of their sales of the Shares from time to time.

                                  LEGAL MATTERS

     The  validity of the shares of Common Stock  offered  hereby will be passed
upon for DSET by Buchanan Ingersoll Professional  Corporation,  650 College Road
East, Princeton, New Jersey 08540.

                                     EXPERTS

     The financial  statements  incorporated  by reference in this Prospectus by
reference  to the  Annual  Report on Form 10-K for the year ended  December  31,
1998,  have  been  so   incorporated   herein  in  reliance  on  the  report  of
PricewaterhouseCoopers  LLP, independent accountants,  given on the authority of
said firm as experts in auditing and accounting.

                      INFORMATION INCORPORATED BY REFERENCE

     The SEC allows DSET to  "incorporate  by reference"  the  information  DSET
files with the SEC, which means that DSET 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 DSET
files  later  with  the  SEC  will  automatically   update  and  supersede  this
information.  DSET  incorporates by reference the documents listed below and any
future  filings made by DSET with the SEC under  Sections  13(a),  13(c),  14 or
15(d) of the Exchange Act until the filing of a post-effective amendment to this
Prospectus  which  indicates  that all securities  registered  have been sold or
which deregisters all securities then remaining unsold:

     o    DSET's  Annual  Report on Form 10-K for the year  ended  December  31,
          1998, filed with the SEC on March 31, 1999;

     o    All other  reports filed by DSET pursuant to Section 13(a) or 15(d) of
          the Exchange Act since December 31, 1998; and

     o    The  description  of  DSET's  Common  Stock,  no par  value,  which is
          contained in DSET's Registration  Statement on Form 8-A filed pursuant
          to Section 12(g) of the Exchange Act in the form declared effective by
          the SEC on March 12, 1998,  and any  subsequent  amendments or reports
          filed for the purpose of updating such description.

     DSET will  provide to any person,  including  any  beneficial  owner of its
securities,  to whom this  Prospectus is delivered,  a copy of any or all of the
information that has been



                                     - 22 -
<PAGE>

incorporated  by  reference  in this  Prospectus  but not  delivered  with  this
Prospectus.  You  may  make  such  requests  at no  cost  to you by  writing  or
telephoning DSET at the following address or number:

               DSET Corporation
               1160 US Highway 22 East
               Bridgewater, New Jersey 08807
               Attention: Human Resources
               Telephone: (908) 526-7500

     You  should  rely only on the  information  incorporated  by  reference  or
provided  in  this  Prospectus  or  any  Prospectus  Supplement.  DSET  has  not
authorized  anyone else to provide you with different  information.  DSET is not
making  an  offer  of these  securities  in any  state  where  the  offer is not
permitted.  You should not assume that the information in this Prospectus or any
Prospectus  Supplement  is  accurate  as of any date  other than the date on the
front of those documents.

                       WHERE YOU CAN FIND MORE INFORMATION

     DSET files annual,  quarterly and special  reports,  proxy  statements  and
other  information  with the SEC. DSET's SEC filings are available to the public
over the Internet at the SEC's website at http://www.sec.gov.  You may also read
and copy, at prescribed rates, any document DSET files with the SEC at the SEC's
Public Reference Room at 450 Fifth Street, N.W.,  Washington,  D.C. 20549 and at
the regional  offices of the SEC at Seven World Trade  Center,  Suite 1300,  New
York, New York 10048 and Citicorp Center,  500 West Madison Street,  Suite 1400,
Chicago, Illinois 60661-2511.  Please call the SEC at 1-800-SEC-0330 for further
information on the SEC's Public Reference Room.

     DSET has filed with the SEC a Registration  Statement on Form S-8 under the
Securities Act with respect to the Shares offered hereby. This Prospectus, which
constitutes  a part of that  registration  statement,  does not  contain all the
information  contained  in the  registration  statement  and its  exhibits.  For
further  information with respect to DSET and the Shares, you should consult the
registration statement and its exhibits. Statements contained in this Prospectus
concerning  the provisions of any documents are  necessarily  summaries of those
documents,  and each  statement is qualified in its entirety by reference to the
copy of the document filed with the SEC. The  registration  statement and any of
its amendments, including exhibits filed as a part of the registration statement
or an amendment to the registration statement,  are available for inspection and
copying as described above.

                    INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Section 14A:3-5 of the New Jersey Business Corporation Act permits each New
Jersey business corporation to indemnify its directors,  officers, employees and
agents  against  expenses and  liabilities  in  connection  with any  proceeding
involving  such  persons  by reason  of his  serving  or  having  served in such
capacities  or for each such  person's  acts taken in his or her  capacity  as a
director,  officer,  employee or agent of the  corporation  if such actions were
taken in good faith and in a manner which he or she reasonably believed to be in
or not opposed to the best interests of the corporation, and with respect to any
criminal proceeding,  if he or she had no reasonable



                                     - 23 -
<PAGE>

cause  to  believe  his or her  conduct  was  unlawful,  provided  that any such
proceeding is not by or in the right of the corporation.

     Section  14A:2-7(3) of the New Jersey  Business  Corporation  Act enables a
corporation  in its  certificate  of  incorporation  to limit the  liability  of
directors  and  officers  of  the   corporation   to  the   corporation  or  its
shareholders.  Specifically,  the certificate of incorporation  may provide that
directors  and officers of the  corporation  will not be  personally  liable for
money  damages  for breach of a duty as a  director  or an  officer,  except for
liability:  (i) for any breach of the director's or officer's duty of loyalty to
the  corporation  or its  shareholders;  (ii) for acts or omissions  not in good
faith or which involve a knowing  violation of law; (iii) as to directors  only,
under Section  14A:6-12(1)  of the New Jersey  Business  Corporation  Act, which
relates to unlawful  declarations of dividends or other  distributions of assets
to shareholders or the unlawful  purchase of shares of the corporation;  or (iv)
for any  transaction  from which the  director  or officer  derived an  improper
personal benefit.

     DSET's  Amended  and  Restated  Certificate  of  Incorporation  limits  the
liability of its directors and officers as authorized by Section 14A:2-7(3).

     Article XI of DSET's Amended and Restated By-laws specifies that DSET shall
indemnify  its  directors,  officers,  employees  and agents to the extent  such
parties are a party to any action because he was a director,  officer,  employee
or agent of DSET.  This  provision  of the  By-laws  is deemed to be a  contract
between DSET and each  director  and officer who serves in such  capacity at any
time while such provision and the relevant provisions of the New Jersey Business
Corporation Act are in effect, and any repeal or modification  thereof shall not
offset any action,  suit or  proceeding  theretofore  or  thereafter  brought or
threatened  based in  whole  or in part  upon  any  such  state  of  facts.  The
affirmative  vote of the  holders  of at least  80% of the  voting  power of all
outstanding  shares of  capital  stock of DSET is  required  to adopt,  amend or
repeal such provisions of the By-laws.

     DSET has executed indemnification  agreements with each of its officers and
directors  pursuant to which DSET has agreed to  indemnify  such  parties to the
full  extent  permitted  by law,  subject to certain  exceptions,  if such party
becomes  subject  to an  action  because  such  party  is a  director,  officer,
employee, agent or fiduciary of DSET.

     DSET has also obtained liability insurance for the benefit of its directors
and officers  which will provide  coverage for losses of directors  and officers
for  liabilities  arising out of claims against such persons acting as directors
or officers  of DSET due to any breach of duty,  neglect,  error,  misstatement,
misleading  statement,  omission  or act done by such  directors  and  officers,
except as prohibited by law.

     Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors,  officers or persons controlling DSET pursuant to
the foregoing provisions,  DSET has been informed that in the opinion of the SEC
such indemnification is against public policy as expressed in the Securities Act
and is therefore unenforceable.




                                     - 24 -
<PAGE>

                                     PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3.   INCORPORATION OF DOCUMENTS BY REFERENCE.

     The SEC allows DSET to  "incorporate  by reference"  the  information  DSET
files with the SEC, which means that DSET 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 DSET
files  later  with  the  SEC  will  automatically   update  and  supersede  this
information.  DSET  incorporates by reference the documents listed below and any
future  filings made by DSET with the SEC under  Sections  13(a),  13(c),  14 or
15(d) of the Exchange Act until the filing of a post-effective amendment to this
Prospects which indicates that all securities registered have been sold or which
deregisters all securities then remaining unsold:

     o    DSET's  Annual  Report on Form 10-K for the year  ended  December  31,
          1998, filed with the SEC on March 31, 1999;

     o    All other  reports filed by DSET pursuant to Section 13(a) or 15(d) of
          the Exchange Act since December 31, 1998; and

     o    The  description  of  DSET's  Common  Stock,  no par  value,  which is
          contained in DSET's Registration  Statement on Form 8-A filed pursuant
          to Section 12(g) of the Exchange Act in the form declared effective by
          the SEC on March 12, 1998,  and any  subsequent  amendments or reports
          filed for the purpose of updating such description.

ITEM 4.   DESCRIPTION OF SECURITIES.

     Not applicable.

ITEM 5.   INTERESTS OF NAMED EXPERTS AND COUNSEL.

     Not applicable.

ITEM 6.   INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     Section 14A:3-5 of the New Jersey Business Corporation Act permits each New
Jersey business corporation to indemnify its directors,  officers, employees and
agents  against  expenses and  liabilities  in  connection  with any  proceeding
involving  such  persons  by reason  of his  serving  or  having  served in such
capacities  or for each such  person's  acts taken in his or her  capacity  as a
director,  officer,  employee or agent of the  corporation  if such actions were
taken in good faith and in a manner which he or she reasonably believed to be in
or not opposed to the best interests of the corporation, and with respect to any
criminal proceeding,  if he or she had no reasonable cause to believe his or her
conduct was  unlawful,  provided  that any such  proceeding  is not by or in the
right of the corporation.

     Section  14A:2-7(3) of the New Jersey  Business  Corporation  Act enables a
corporation  in its  certificate  of  incorporation  to limit the  liability  of
directors and officers of the corporation to


                                      II-1
<PAGE>

the  corporation  or  its   shareholders.   Specifically,   the  certificate  of
incorporation  may provide that directors and officers of the  corporation  will
not be personally liable for money damages for breach of a duty as a director or
an  officer,  except  for  liability:  (i) for any breach of the  director's  or
officer's duty of loyalty to the corporation or its shareholders;  (ii) for acts
or  omissions  not in good faith or which  involve a knowing  violation  of law;
(iii) as to directors only, under Section 14A:6-12(1) of the New Jersey Business
Corporation  Act, which relates to unlawful  declarations  of dividends or other
distributions  of assets to shareholders  or the unlawful  purchase of shares of
the corporation;  or (iv) for any transaction from which the director or officer
derived an improper personal benefit.

     DSET's  Amended  and  Restated  Certificate  of  Incorporation  limits  the
liability of its directors and officers as authorized by Section 14A:2-7(3).

     Article XI of DSET's Amended and Restated By-laws specifies that DSET shall
indemnify  its  directors,  officers,  employees  and agents to the extent  such
parties are a party to any action because he was a director,  officer,  employee
or agent of DSET.  This  provision  of the  By-laws  is deemed to be a  contract
between DSET and each  director  and officer who serves in such  capacity at any
time while such provision and the relevant provisions of the New Jersey Business
Corporation Act are in effect, and any repeal or modification  thereof shall not
offset any action,  suit or  proceeding  theretofore  or  thereafter  brought or
threatened  based in  whole  or in part  upon  any  such  state  of  facts.  The
affirmative  vote of the  holders  of at least  80% of the  voting  power of all
outstanding  shares of  capital  stock of DSET is  required  to adopt,  amend or
repeal such provisions of the By-laws.

     DSET has executed indemnification  agreements with each of its officers and
directors  pursuant to which DSET has agreed to  indemnify  such  parties to the
full  extent  permitted  by law,  subject to certain  exceptions,  if such party
becomes  subject  to an  action  because  such  party  is a  director,  officer,
employee, agent or fiduciary of DSET.

     DSET has also obtained liability insurance for the benefit of its directors
and officers  which will provide  coverage for losses of directors  and officers
for  liabilities  arising out of claims against such persons acting as directors
or officers  of DSET due to any breach of duty,  neglect,  error,  misstatement,
misleading  statement,  omission  or act done by such  directors  and  officers,
except as prohibited by law.

ITEM 7.   EXEMPTION FROM REGISTRATION CLAIMED.

     The issuance of the Shares being offered by the Form S-3 Reoffer Prospectus
were deemed exempt from  registration  under the Securities Act in reliance upon
either  Section 4(2) of the  Securities  Act as  transactions  not involving any
public  offering  or Rule 701  under the  Securities  Act as  transactions  made
pursuant  to a written  compensatory  plan or  pursuant  to a  written  contract
relating to compensation.



                                      II-2
<PAGE>

ITEM 8.   EXHIBITS.

   Exhibit Number                           Description
- --------------------  ----------------------------------------------------------
        4.1           DSET Corporation 1993 Stock Option Plan.

        4.2           DSET Corporation 1998 Stock Plan.

        5.1           Opinion of Buchanan Ingersoll Professional Corporation.

       23.1           Consent of PricewaterhouseCoopers LLP.

       23.2           Consent of  Buchanan  Ingersoll  Professional  Corporation
                      (contained in the opinion filed as Exhibit 5.1).

       24             Power of Attorney (contained on the signature page of this
                      Registration Statement).

ITEM 9.   UNDERTAKINGS.

     a.   DSET hereby undertakes:

          (1)    To file, during any  period in which  offers or sales are being
     made, a post-effective amendment to this registration statement:

          (i)    To include any  prospectus required by  Section 10(a)(3) of the
                 Securities Act;

          (ii)   To reflect in the  prospectus any facts or events arising after
                 the effective date of this 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; and

          (iii)  To include any material information with respect to the plan of
                 distribution  not  previously  disclosed  in this  registration
                 statement or any  material  change  to such information in this
                 registration statement;

     provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if
     the information  required to be included in a  post-effective  amendment by
     those  paragraphs is contained in periodic  reports filed with or furnished
     to the SEC by DSET  pursuant to Section 13 or Section 15(d) of the Exchange
     Act that are incorporated by reference in this registration statement.

          (2)   That, for the  purpose of determining  any  liability  under the
     Securities Act, 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.



                                      II-3
<PAGE>

         (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.

     b.  The undersigned  Registrant hereby  undertakes  that,  for purposes of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
Registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Exchange Act (and, where  applicable,  each filing of an employee benefit plan's
annual  report   pursuant  to  Section  15(d)  of  the  Exchange  Act)  that  is
incorporated by reference in this 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.

     c.  Insofar as indemnification for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the SEC such  indemnification is against
public  policy  as  expressed  in  the   Securities   Act  and  is,   therefore,
unenforceable.  In the  event  that a claim  for  indemnification  against  such
liabilities  (other than the payment by the  Registrant of expenses  incurred or
paid by a  director,  officer or  controlling  person of the  Registrant  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 Registrant 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 such issue.



                                      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-8 and has  duly  caused  this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the Township of Bridgewater,  State of New Jersey,  on this 30th
day of November, 1999.

                                       DSET CORPORATION



                                       By: /s/ William P. McHale, Jr.
                                           -------------------------------------
                                           William P. McHale, Jr.
                                           President and Chief Executive Officer




<PAGE>

                                POWER OF ATTORNEY

     KNOW  ALL MEN BY THESE  PRESENTS,  that  each  individual  whose  signature
appears  below  constitutes  and appoints  William P. McHale,  Jr., his true and
lawful   attorney-in-fact   and  agent  with  full  power  of  substitution  and
resubstitution,  for  him  and in his  name,  place  and  stead,  in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this Registration Statement,  and to file the same with all exhibits thereto,
and all  documents in  connection  therewith,  with the SEC,  granting unto said
attorney-in-fact  and agent full power and  authority to do and perform each and
every  act and  thing  requisite  and  necessary  to be done  in and  about  the
premises,  as  fully  to all  intents  and  purposes  as he might or could do in
person, hereby ratifying and confirming all that said attorney-in-fact and agent
or his substitute or substitutes,  may lawfully do or cause to be done by virtue
hereof.

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

          Signature                      Title                       Date
- ----------------------------  -------------------------------  -----------------

/s/ William P. McHale, Jr.    President, Chief Executive       November 30, 1999
- ---------------------------
William P. McHale, Jr.        Officer and Director (Principal
                              Executive Officer)

/s/ Bruce M. Crowell          Chief Financial Officer          November 30, 1999
- ---------------------------
Bruce M. Crowell              (Principal Financial and
                              Accounting Officer)

/s/ S. Daniel Shia            Chairman of the Board,           November 30, 1999
- ---------------------------
S. Daniel Shia                Chief Technical Officer and
                              Director

/s/ Bruce R. Evans            Director                         November 30, 1999
- ---------------------------
Bruce R. Evans

/s/ Jacob J. Goldberg         Director                         November 30, 1999
- ---------------------------
Jacob J. Goldberg

/s/ C. Daniel Yost            Director                         November 30, 1999
- ---------------------------
C. Daniel Yost

- ---------------------------   Director
Andrew D. Lipman





<PAGE>

                                  EXHIBIT INDEX

   Exhibit Number                           Description
- --------------------  ----------------------------------------------------------
        4.1           DSET Corporation 1993 Stock Option Plan.

        4.2           DSET Corporation 1998 Stock Plan.

        5.1           Opinion of Buchanan Ingersoll Professional Corporation.

       23.1           Consent of PricewaterhouseCoopers LLP.

       23.2           Consent of  Buchanan  Ingersoll  Professional  Corporation
                      (contained in the opinion filed as Exhibit 5.1).

       24             Power of Attorney (contained on the signature page of this
                      Registration Statement).



                                  EXHIBIT 4.1

                    DSET Corporation 1993 Stock Option Plan

<PAGE>

                                DSET CORPORATION
                                STOCK OPTION PLAN

                          As Adopted September 15, 1993
         As Amended August 5, 1994, September 10, 1996, January 30, 1997

1.   PURPOSE.  This Stock  Option Plan (the  "Plan") is  established  to provide
     incentive  for  selected  persons  to promote  the  financial  success  and
     progress to DSET  Corporation  (the  "Company")  by granting  such  persons
     options to purchase shares of common stock of the Company.

2.   ADOPTION  AND  SHAREHOLDER  APPROVAL.  This Plan shall be  approved  by the
     shareholders  of  the  Company,  in  any  manner  permitted  by  applicable
     corporate law, within twelve (12) months before or after the date this Plan
     is  adopted by the Board and after the date of  certain  amendments  to the
     Plan.  In  addition,  no later than twelve  (12)  months  after the Company
     becomes subject to Section 16(b) of the Securities Exchange Act of 1934, as
     amended (the "Exchange Act") the Company will comply with the  requirements
     of Rule 16b-3 with respect to shareholder approval.

3.   TYPES  OF  OPTIONS  AND  SHARES.  Options  granted  under  this  Plan  (the
     "Options") may be either (a) incentive  stock options  ("ISOs")  within the
     meaning of Section 422 of the Internal Revenue Code of 1986 as amended (the
     "Code"), or (b) nonqualified stock options ("NQSOs"),  as designated at the
     time of grant.  The shares of stock that may be purchased  upon exercise of
     Options  granted  under this Plan (the  "Shares")  are shares of the common
     stock of the Company.

4.   NUMBER OF SHARES.  The maximum number of Shares that may be issued pursuant
     to Options  granted  under this Plan is Two  Million  Three  Hundred  Sixty
     Thousand  (2,360,000)  Shares,  subject to  adjustment  as provided in this
     Plan. If any Option is terminated for any reason without being exercised in
     whole or in part,  the Shares  thereby  released  from such Option shall be
     available for purchase under other Options  subsequently granted under this
     Plan. At all times during the term of this Plan,  the Company shall reserve
     and keep  available  such  number of Shares as shall be required to satisfy
     the requirements of outstanding Options under this Plan.

5.   ADMINISTRATION.  This Plan may be administered by the Board of Directors of
     the Company or a Committee appointed by the Board (the "Committee"). If, at
     the time the Company  registers  under the Exchange  Act, a majority of the
     Board is not comprised of Disinterested  Persons, the Board shall appoint a
     Committee  consisting  of not less  than  three  persons  (who  need not be
     members of the Board), each of whom is a "Disinterested Person" (as defined
     in Section  6(b)(iv) of the Plan). As used in this Plan,  references to the
     "Committee"  shall mean either such  Committee or the Board if no Committee
     has been established.  After registration of the Company under the Exchange
     Act,  Board members who are not  Disinterested  Persons may not vote on any
     matters  affecting the  administration  of this Plan or on the grant of any
     Options pursuant to this Plan to any


<PAGE>

     officer  or  director  of the  Company or other  person  (in each case,  an
     "Insider") whose  transactions in the Company's common stock are subject to
     Section  16(b) of the Exchange  Act, but any such member may be counted for
     determining  the  existence  of a quorum at any meeting of the Board during
     which  action is taken with  respect to Options or  administration  of this
     Plan and may vote on the grant of any  Options  pursuant to this Plan other
     than  to  Insiders.  The  interpretation  by  the  Committee  of any of the
     provisions  of this Plan or any  Option  granted  under  this Plan shall be
     final and binding  upon the  Company and all persons  having an interest in
     any Option or any Shares purchased pursuant to an Option. The Committee may
     delegate the  authority to officers of the Company to grant  Options  under
     this Plan to Optionees who are not Insiders of the Company.

6.   ELIGIBILITY.  Options  may be  granted  only to such  employees,  officers,
     directors  and  consultants  of the  Company or any Parent,  Subsidiary  of
     Affiliate of the Company (as defined  below) as the Committee  shall select
     from time to time in its sole discretion ("Optionees"),  provided that only
     employees of the Company or a Parent or  Subsidiary of the Company shall be
     eligible to receive  ISOs.  An Optionee may be granted more than one Option
     under this Plan.

     (a)  Assumption  of Options.  The Company  may,  from time to time,  assume
          outstanding options granted by another company,  whether in connection
          with an acquisition of such other company or otherwise,  by either (i)
          granting  an option  under  this  Plan in  replacement  of the  option
          assumed by the Company,  or (ii) treating the assumed  option as if it
          had been granted  under this Plan if the terms of such assumed  option
          could be applied to an option granted under this Plan. Such assumption
          shall be  permissible  if the holder of the assumed  option would have
          been eligible to be granted an option hereunder.  If the other Company
          had applied the rules of this Plan to such grant.

     (b)  Definitions.  As used in the Plan, the following  terms shall have the
          following meanings:

          i.   "Parent"  means any  corporation  (other than the  Company) in an
               unbroken chain of corporation  ending with the Company if, at the
               time of the  granting  of the Option,  each of such  corporations
               other than the Company owns stock  possessing  50% or more of the
               total combined voting power of all classes of stock in one of the
               other corporations in such chain.

          ii.  "Subsidiary" means any corporation (other than the Company) in an
               unbroken chain of corporations  beginning with the Company if, at
               the time of  granting  of the  Option,  each of the  corporations
               other than the last  corporation in the unbroken chain owns stock
               possessing 50% or more of the total combined  voting power of all
               classes of stock in one of the other corporations in such chain.
<PAGE>

          iii. "Affiliate"  means any corporation  that directly,  or indirectly
               through one or more intermediaries, controls or is controlled by,
               or is  under  common  control  with  another  corporation,  where
               "control"  (including the terms "controlled by" and "under common
               control with") means the possession,  direct or indirect,  of the
               power of cause the  direction of the  management  and policies of
               the   corporation,   whether  through  the  ownership  of  voting
               securities, by contract or otherwise.

          iv.  "Disinterested  Person"  shall have the meaning set forth in Rule
               16b-3(d)(3)   as  promulgated  by  the  Securities  and  Exchange
               Commission  ("SEC")  under  Section 16(b) of the Exchange Act, as
               such rule is amended from time to time and as  interpreted by the
               SEC.

          v.   "Fair  Market  Value"  shall  mean the fair  market  value of the
               Shares as determined  by the Committee  from time to time in good
               faith. If a public market exists for the Shares,  the Fair Market
               Value  shall be the  average of the last  reported  bid and asked
               prices for Common  Stock of the  Company on the last  trading day
               prior to the date of  determination  or, in the event the  Common
               Stock of the Company is listed on a stock  exchange or the NASDAQ
               National  Market  System,  the  Fair  Market  Value  shall be the
               closing  price on such  exchange or quotation  system on the last
               trading day prior to the date of determination.

7.   TERMS AND CONDITIONS OF OPTIONS. The Committee shall determine whether each
     Option  is to be an ISO or an NQSO,  the  number  of  Shares  for which the
     Option  shall be granted,  the  exercise  price of the Option,  the periods
     during  which  the  Option  may be  exercised,  and  all  other  terms  and
     conditions of the Option, subject to the following terms and conditions:

     (a)  Form of Option  Grant.  Each Option  granted  under this Plan shall be
          evidenced  by a written  Stock  Option  Grant  ("Grant")  in such form
          (which need not be the same for each Optionee) as the Committee  shall
          from  time to time  approve,  which  Grant  shall  comply  with and be
          subject to the terms and conditions of this Plan.

     (b)  Exercise Price. The exercise price of an Option shall be not less than
          the Fair Market  Value of the  Shares,  at the time that the Option is
          granted.  The exercise  price of any Option granted to a person owning
          10% or more of the total combined voting power of all classes of stock
          of the  Company  or any  Parent or  subsidiary  of the  Company  ("Ten
          Percent  Shareholder")  shall not be less than 110% of the Fair Market
          Value of the Shares at the time of the  grant,  as  determined  by the
          Committee in good faith.

     (c)  Exercise Period. Options shall be exercisable within the times or upon
          the  events  determined  by the  Committee  as set forth in the Grant,
          provided,  however,  that no  Option  shall be  exercisable  after the
          expiration of ten years from the date the


<PAGE>

          Option is granted,  and provided  further that no Option  granted to a
          Ten Percent  Shareholder  shall be exercisable after the expiration of
          five years from the date the Option is granted.

     (d)  Limitations on ISOs. The aggregate Fair Market Value (determined as of
          the time an Option is granted) of stock with respect to which ISOs are
          exercisable for the first time by an Optionee during the calendar year
          (under this Plan or under any other incentive stock option plan of the
          Company or any Parent or Subsidiary  of the Company)  shall not exceed
          $100,000. If the Fair Market Value of stock with respect to which ISOs
          are  first  exercised  exceeds  $100,000,  the  Options  for the first
          $100,000  worth of stock  shall be ISOs and  options for the amount in
          excess of $100,000 shall be NQSOs.

     (e)  Date of  Grant.  The date of grant of an  Option  shall be the date on
          which the  Committee  makes the  determination  to grant  such  Option
          unless otherwise  specified by the Committee.  The Grant  representing
          the Option shall be delivered to the Optionee within a reasonable time
          after the granting of the Option.

     (f)  Assumed Options. In the event the Company assumes an option granted by
          another company,  the terms and conditions of such option shall remain
          unchanged  (except  the  exercise  price and the  number and nature of
          shares  issuable upon exercise,  which will be adjusted  appropriately
          pursuant  to  Section  424(c) of the Code).  In the event the  Company
          elects to grant a new option rather than  assuming an existing  option
          (as specified in Section 6(a),  such new option need not be granted at
          Fair Market Value on the date of grant and may instead be granted with
          a similarly adjusted exercise price.

8.   EXERCISE OF OPTIONS.

     (a)  Notice.  Options may be exercised only by delivery to the Company of a
          written  notice  and  exercise  agreement  in a form  approved  by the
          Committee,   stating  the  number  of  Shares  being  purchased,   the
          restrictions  imposed  on the  Shares  and  such  representations  and
          agreements  regarding the Optionee's  investment  intent and access to
          information  as  may  be  required  by  the  Company  to  comply  with
          applicable  securities  laws  together  with  payment  in  full of the
          exercise price for the number of Shares being purchased.

     (b)  Payment.  Payment  for the Shares may be made (i) in cash (by  check);
          (ii) by  surrender  of shares of common stock of the Company that have
          been owned by  Optionee  for more than six (6) months  (and which have
          been paid for within the  meaning of SEC Rule 144 and,  if such shares
          were purchased from the Company by use of a promissory note, such note
          has been fully paid with respect to such  shares) or were  obtained by
          the  Optionee in the open public  market,  having a Fair Market  Value
          equal to the exercise  price of the Option;  (iii) where  permitted by
          applicable  law and approved by the Committee in its sole  discretion,
          by tender of


<PAGE>

          a full recourse  promissory  note having such terms as may be approved
          by the Committee; (iv) provided that a public market for the Company's
          stock exists,  through a "same day sale"  commitment from the Optionee
          and a  broker-dealer  that is a member of the National  Association of
          Securities Dealers (a "NASD Dealer") whereby the Optionee  irrevocably
          elects to  exercise  the Option and to sell a portion of the Shares so
          purchased  to pay for the  exercise  price and whereby the NASD Dealer
          irrevocably  commits  upon  receipt  of such  Shares  to  forward  the
          exercise price directly to the Company;  or (v) by any  combination of
          the foregoing where approved by the Committee in its sole  discretion.
          Optionees  who are not employees or directors of the Company shall not
          be entitled to purchase  Shares with a promissory note unless the note
          is adequately secured by collateral other than the Shares.

     (c)  Withholding Taxes. Prior to issuance of the Shares upon exercise of an
          Option,  the Optionee  shall pay or make  adequate  provision  for any
          federal  or  state   withholding   obligations  of  the  Company,   if
          applicable.

     (d)  Limitations  on Exercise.  Notwithstanding  the  exercise  periods set
          forth in the Grant,  exercise of an Option  shall always be subject to
          the following limitations:

          i.   If an  Optionee  ceases  to be  employed  by the  Company  or any
               Parent,  Subsidiary  or  Affiliate  of the Company for any reason
               except  death or  disability,  the  Optionee  may  exercise  such
               Optionee's Options to the extent (and only to the extent) that it
               would have been exercisable upon the date of termination,  within
               three (3) months after the date of  termination  (or such shorter
               time period as may be specified in the Grant),  provided that, if
               Optionee  is an  Insider  and the  Company  is subject to Section
               16(b)  of  the  Exchange  Act,  the  Optionee's  Option  will  be
               exercisable  for a  period  of  time  sufficient  to  allow  such
               Optionee  from having a matching  purchase and sale under Section
               16(b),   with  any   extension   beyond  three  (3)  months  from
               termination  of employment in the case of an Option  constituting
               an ISO being deemed to be an NQSO,  and provided  further that in
               no event may an Option be  exercisable  later than the expiration
               date of the Option.
          ii.  If an  Optionee's  employment  with the  Company  or any  Parent,
               Subsidiary or Affiliate of the Company is  terminated  because of
               the death of the Optionee or  disability  of the Optionee  within
               the  meaning of Section  22(e)(3)  of the Code,  such  Optionee's
               Options may be  exercised  to the extent (and only to the extent)
               that it would have been  exercisable  by the Optionee on the date
               of  termination,   by  the  Optionee  (or  the  Optionee's  legal
               representative)  within  twelve  (12)  months  after  the date of
               termination  (or such  shorter time period as may be specified in
               the Grant), but in any event no later than the expiration date of
               the Options.
          iii. The  Committee  shall have  discretion  to determine  whether the
               Optionee  has ceased to be employed by the Company or any Parent,
               Subsidiary or

<PAGE>

               Affiliate of the  Company and the  effective  date on  which such
               employment terminated.
          iv.  In  the  case  of an  Optionee  who  is a  director,  independent
               consultant,  contractor or advisor,  the Committee  will have the
               discretion to determine  whether the Optionee is "employed by the
               Company or any Parent,  Subsidiary  or  Affiliate of the Company"
               pursuant to the foregoing Sections.
          v.   An Option  shall not be  exercisable  unless such  exercise is in
               compliance  with the Securities Act of 1933, as amended,  and all
               applicable  state  securities  laws, as they are in effect on the
               date of exercise.
          vi.  An Option shall not be  exercisable if the Optionee is in default
               of any obligations owed the Company or any Parent,  Subsidiary or
               Affiliate of the Company, whether by operation of law or pursuant
               to contract.
          vii. The Committee may specify a reasonable  minimum  number of Shares
               that may be purchased on any exercise of an Option, provided that
               such minimum number will not prevent the Optionee from exercising
               the  full  number  of  Shares  as to  which  the  Option  is then
               exercisable.

9.   NONTRANSFERABILITY  OF OPTIONS.  During the  lifetime of the  Optionee,  an
     Option shall be  exercisable  only by the Optionee.  No Option may be sold,
     pledged, assigned,  hypothecated,  transferred or disposed of in any manner
     other than by will or by the laws of descent and distribution.

10.  PRIVILEGES OF STOCK OWNERSHIP.  No Optionee shall have any of the rights of
     a  shareholder  with  respect to any Shares  subject to an Option until the
     Option  has  been  validly  exercised.  No  adjustment  shall  be made  for
     dividends  or  distributions  or other  rights for which the record date is
     prior to the date of exercise, except as provided in this Plan. The Company
     shall provide to each Optionee a copy of the annual financial statements of
     the  Company,  at such  time  after the  close of each  fiscal  year of the
     Company as they are released by the Company to its shareholders.

11.  ADJUSTMENT OF OPTIONS  SHARES.  In the event that the number of outstanding
     shares of common stock of the Company is changed by a stock dividend, stock
     split, reverse stock split, combination, reclassification or similar change
     in the capital structure of the Company without  consideration,  the number
     of Shares  available  under this Plan and the  number of Shares  subject to
     outstanding  options and the exercise price per share of such Options shall
     be proportionately adjusted, subject to any required action by the Board or
     shareholders of the Company and compliance with applicable securities laws;
     provided,  however,  that no certificate or scrip  representing  fractional
     shares  shall be issued  upon  exercise  of any  Option  and any  resulting
     fractions of a Share shall be ignored.

12.  NO OBLIGATION TO EMPLOY.  Nothing in this Plan or any Option  granted under
     this Plan shall  confer on any Optionee any right to continue in the employ
     of the Company or any Parent,  Subsidiary  or  Affiliate  of the Company or
     limit in any way the right of the


<PAGE>

     Company or any Parent, Subsidiary or Affiliate  of the Company to terminate
     the Optionee's employment at any time, with or without cause.

13.  COMPLIANCE  WITH LAWS. The grant of Options and the issuance of Shares upon
     exercise of any Options shall be subject to and conditioned upon compliance
     with all  applicable  requirements  of law,  including  without  limitation
     compliance  with the  Securities  Act of 1933,  as  amended,  any  required
     approval by the Secretary of State of New Jersey, compliance with all other
     applicable  state  securities laws and compliance with the  requirements of
     any stock exchange on which the Shares may be listed.  The Company shall be
     under no  obligation  to  register  the  Shares  with the SEC or to  effect
     compliance with the registration or qualification requirements of any state
     securities laws or stock exchange.

14.  RESTRICTIONS ON SHARES. At the discretion of the Committee, the Company may
     reserve  to  itself  or its  assignee(s)  in the Grant (a) a right of first
     refusal  to  purchase   any  Shares  that  an  Optionee  (or  a  subsequent
     transferee)  may  propose to  transfer  to a third party and (b) a right to
     repurchase all Shares held by an Optionee upon the  Optionee's  termination
     of  employment  or service  with the Company or its Parent,  Subsidiary  or
     Affiliate  of the  Company  for  any  reason  within  a  specified  time as
     determined  by the  Committee  at the time of  grant at (i) the  Optionee's
     original  purchase  price  (provided  that the right to  repurchase at such
     price  shall  lapse at the rate of at least  20% per year  from the date of
     grant),  (ii) the Fair  Market  Value of such Shares as  determined  by the
     Committee in good faith or (iii) a price  determined  by a formula or other
     provision set forth in the Grant.

15.  ASSUMPTION  OF  OPTIONS BY  SUCCESSORS.  In the event of a  dissolution  or
     liquidation  of the  Company,  a merger  in which  the  Company  is not the
     surviving  corporation,  or the sale of substantially  all of the assets of
     the Company,  any or all  outstanding  Options shall,  notwithstanding  any
     contrary terms of the Grant,  accelerate and become  exercisable in full at
     least ten days prior to (and  shall  expire  on) the  consummation  of such
     dissolution, liquidation, merger or sale of stock or sale of assets on such
     conditions  as  the  Committee   shall   determine   unless  the  successor
     corporation  assumes the outstanding  Options or substitutes  substantially
     equivalent options. The aggregate Fair Market Value (determined at the time
     an Option is  granted)  of stock with  respect to ISOs which  first  become
     exercisable in the year of such dissolution,  liquidation  merger,  sale of
     stock or sale of assets cannot exceed $100,000.  Any remaining  accelerated
     ISOs shall be NQSOs.

16.  AMENDMENT OR  TERMINATION  OF PLAN. The Committee may at any time terminate
     or amend this Plan in any respect (including,  but not limited to, any form
     of Grant,  agreement or instrument  to be executed  pursuant to this Plan);
     provided,  however,  that the Committee shall not,  without the approval of
     the holders of a majority of the outstanding  voting shares of the Company,
     amend this Plan in any  manner  that  requires  such  shareholder  approval
     pursuant to the Code or the regulations promulgated


<PAGE>

     thereunder as such provisions apply  to  incentive  stock  option  plans or
     pursuant  to the  Exchange Act or Rule 16b-3 (or its successor) promulgated
     thereunder.

17.  TERM OF PLAN.  Options  may be granted  pursuant  to this Plan from time to
     time within a period of ten years from the date this Plan is adopted by the
     Board of Directors.



                                  EXHIBIT 4.2

                        DSET Corporation 1998 Stock Plan

<PAGE>

                                DSET CORPORATION

                                 1998 STOCK PLAN



     1.   Purposes of the Plan.  The  purposes of this Stock Plan are to attract
           --------------------
and  retain  the  best   available   personnel  for  positions  of   substantial
responsibility,  to provide  additional  incentive  to  Employees,  non-Employee
members of the Board and Consultants of the Company and its  Subsidiaries and to
promote the success of the Company's  business.  Options  granted under the Plan
may be incentive  stock  options (as defined  under  Section 422 of the Code) or
non-statutory  stock options,  as determined by the Administrator at the time of
grant of an option and subject to the  applicable  provisions  of Section 422 of
the Code, as amended, and the regulations promulgated thereunder. Stock purchase
rights may also be granted under the Plan.

     2.   Certain Definitions.   As used herein, the following definitions shall
          -------------------
apply:

          (a) "Administrator" means the Board or any of its Committees appointed
               -------------
pursuant to Section 4 of the Plan.

          (b) "Board" means the Board of Directors of the Company.
               -----

          (c) "Code" means the Internal Revenue Code of 1986, as amended.
               ----

          (d) "Committee"   means  the  Committee  appointed  by  the  Board  of
               ---------
Directors in accordance with paragraph (a) of Section 4 of the Plan.

          (e) "Common Stock" means the Common Stock,  without par value, of  the
               ------------
Company.

          (f) "Company" means DSET Corporation, a New Jersey corporation.
               -------

          (g) "Consultant"  means  any  person,  including an  advisor,  who  is
               ----------
engaged by the Company or any Parent or  subsidiary  to render  services  and is
compensated  for  such  services,  and  any  director  of  the  Company  whether
compensated for such services or not.

          (h) "Continuous  Status as an  Employee"  means  the  absence  of  any
               ----------------------------------
interruption or termination of the employment relationship by the Company or any
Subsidiary. Continuous Status as an Employee shall not be considered interrupted
in the case of: (i) sick leave;  (ii) military  leave;  (iii) any other leave of
absence  approved by the Board,  provided that such leave is for a period of not
more than ninety (90) days,  unless  reemployment  upon the  expiration  of such
leave is  guaranteed  by  contract  or  statute,  or unless  provided  otherwise
pursuant to Company policy adopted from time to time; or (iv) transfers  between
locations  of the  Company or  between  the  Company,  its  Subsidiaries  or its
successor.
<PAGE>

          (i) "Employee"  means any  person,  including officers and  directors,
               --------
employed by the Company or any Parent or Subsidiary of the Company.  The payment
of a  director's  fee by the  Company  shall  not be  sufficient  to  constitute
"employment" by the Company.

          (j) "Exchange Act"  means  the  Securities  Exchange  Act of  1934, as
               ------------
amended.

          (k) "Fair Market  Value"  means, as of any date,  the  value of Common
               ------------------
Stock determined as follows:

              (i)    If the Common  Stock  is listed  on any  established  stock
          exchange or a national market system, including without limitation the
          Nasdaq  National  Market,  its Fair Market  Value shall be the closing
          sales  price for such  stock (or the  closing  bid,  if no sales  were
          reported)  as quoted on such  system or  exchange  for the last market
          trading day prior to the time of determination as reported in the Wall
          Street  Journal  or  such  other  source  as the  Administrator  deems
          reliable; or

              (ii)   If the Common  Stock is  quoted on  Nasdaq  (but not on the
          National  Market System  thereof) or regularly  quoted by a recognized
          securities dealer but selling prices are not reported, its Fair Market
          Value shall be the mean  between the high and low asked prices for the
          Common Stock; or

              (iii)  In the  absence  of an  established  market for the  Common
          Stock, the Fair Market Value thereof shall be determined in good faith
          by the Administrator.

          (l) "Incentive Stock Option" means an Option intended to qualify as an
               ----------------------
incentive stock option within the meaning of Section 422 of the Code.

          (m) "Nonstatutory  Stock  Option"  means  an  Option  not  intended to
               ---------------------------
qualify as an Incentive Stock Option.

          (n) "Option" means a stock option granted pursuant to the Plan.
               ------

          (o) "Optioned Stock" means the Common Stock subject to an Option.
               --------------

          (p) "Optionee" means an Employee or Consultant who receives an Option.
               --------

          (q) "Parent" means a "parent corporation", whether now or hereafter
               ------
existing, as defined in Section 424(e) of the Code.

          (r) "Plan" means this 1998 Stock Plan.
               ----

          (s) "Restricted Stock" means shares of Common Stock acquired pursuant
               ----------------
to a grant of stock purchase rights under Section 11 below.


                                      -2-
<PAGE>

          (t) "Share"  means  a  share  of  the  Common  Stock,  as adjusted  in
               -----
accordance  with Section 13 of the Plan.

          (u) "Subsidiary"  means a  "subsidiary  corporation",  whether now or
               ----------
hereafter existing, as defined in Section 424(f) of the Code.

     3.   Stock Subject to the Plan.  Subject to the provisions of Section 13 of
          -------------------------
the Plan, the maximum  aggregate number of shares which may be optioned and sold
under  the  Plan  is  1,800,000  shares  of  Common  Stock.  The  shares  may be
authorized, but unissued, or reacquired Common Stock.

          If an option  should  expire or become  unexercisable  for any  reason
without having been exercised in full, the unpurchased Shares which were subject
thereto shall, unless the Plan shall have been terminated,  become available for
future grant under the Plan.

     4.   Administration of the Plan.
          --------------------------

          (a)  Procedure.

               (i)   Administration With Respect to Directors and Officers. With
                     -----------------------------------------------------
     respect to grants of Options or stock purchase  rights to Employees who are
     also officers or directors of the Company,  the Plan shall be  administered
     by (A) the Board if the Board may  administer  the Plan in compliance  with
     Rule 16b-3  promulgated  under the  Exchange Act or any  successor  thereto
     ("Rule  16b-3"),  or (B) a Committee  designated by the Board to administer
     the  Plan,  which  Committee  shall be  constituted  in such a manner as to
     permit the Plan to comply with Rule 16b-3.  Once appointed,  such Committee
     shall continue to serve in its designated capacity until otherwise directed
     by the  Board.  From time to time the Board  may  increase  the size of the
     Committee and appoint additional  members thereof,  remove members (with or
     without  cause) and  appoint  new members in  substitution  therefor,  fill
     vacancies,  however  caused,  and remove all members of the  Committee  and
     thereafter  directly  administer the Plan,  all to the extent  permitted by
     Rule 16b-3 with respect to a plan intended to qualify thereunder.

               (ii)  Multiple Administrative Bodies. If permitted by Rule 16b-3,
                     ------------------------------
     the Plan may be administered by different bodies with respect to directors,
     non-director officers and Employees who are neither directors nor officers.

               (iii) Administration   With  Respect  to  Consultants  and  Other
                     -----------------------------------------------------------
     Employees.  With respect to grants of Options or stock  purchase  rights to
     ---------
     Employees  who are  neither  directors  nor  officers  of the Company or to
     Consultants,  the Plan shall be administered by (A) the Board, if the Board
     may administer the Plan in compliance  with Rule 16b-3,  or (B) a Committee
     designated by the Board,  which  Committee  shall be  constituted in such a
     manner as to satisfy the legal requirements  relating to the administration
     of incentive  stock option plans,  if any, of New Jersey  corporate law and
     applicable securities laws and

                                      -3-
<PAGE>

     of the Code (the "Applicable Laws").  Once appointed,  such Committee shall
     continue to serve in its designated  capacity until  otherwise  directed by
     the  Board.  From  time to time  the  Board  may  increase  the size of the
     Committee and appoint additional  members thereof,  remove members (with or
     without  cause) and  appoint  new members in  substitution  therefor,  fill
     vacancies,  however  caused,  and remove all members of the  Committee  and
     thereafter directly administer the Plan, all to the extent permitted by the
     Applicable Laws.

          (b)  Powers of the  Administrator.  Subject to  the  provisions of the
               ----------------------------
Plan and in the case of a Committee,  the specific duties delegated by the Board
to  such  Committee,   the  Administrator  shall  have  the  authority,  in  its
discretion:

               (i)   to determine the Fair Market Value of the Common Stock, in
     accordance with Section 2(k) of the Plan;

               (ii)  to select the officers, Consultants and  Employees  to whom
     Options  and  stock  purchase  rights  may  from  time to  time be  granted
     hereunder;

               (iii) to determine  whether and to what extent Options and stock
     purchase rights or any combination thereof, are granted hereunder;

               (iv)  to  determine  the number of shares of Common  Stock to be
     covered by each such award granted hereunder;

               (v)   to approve forms of agreement for use under the Plan;

               (vi)  to determine the  terms and  conditions,  not  inconsistent
     with the terms of the Plan, of any award granted hereunder (including,  but
     not limited to, the share price and any restriction or limitation or waiver
     of forfeiture  restrictions  regarding any Option or other award and/or the
     shares of Common Stock relating thereto, based in each case on such factors
     as the Administrator shall determine, in its sole discretion);

               (vii) to determine whether and under what circumstances an Option
     may be settled in cash under subsection 9(f) instead of Common Stock;

               (viii) to  determine  whether,  to  what extent  and  under  what
     circumstances  Common  Stock and other  amounts  payable with respect to an
     award  under this Plan shall be  deferred  either  automatically  or at the
     election of the  participant  (including  providing for and determining the
     amount,  if any, of any deemed  earnings on any deferred  amount during any
     deferral period);

               (ix)  to  reduce the  exercise  price of any  Option to the  then
     current  Fair  Market  Value if the Fair Market  Value of the Common  Stock
     covered by such Option  shall have  declined  since the date the Option was
     granted; and

                                      -4-
<PAGE>

              (x)   to determine the terms and  restrictions applicable to stock
     purchase rights and the Restricted Stock purchased by exercising such stock
     purchase rights.

          (c) Effect of Committee's Decision.  All decisions, determinations and
              ------------------------------
interpretations of the Administrator shall be final and binding on all Optionees
and any other holders of any Options.

     5.   Eligibility.
          -----------

          (a) Nonstatutory  Stock  Options  may  be  granted  to  Employees  and
Consultants.  Incentive  Stock  Options  may be granted  only to  Employees.  An
Employee or  Consultant  who has been  granted an Option may, if he is otherwise
eligible, be granted an additional Option or Options.

          (b) Each Option shall be designated in the written option agreement as
either an  Incentive  Stock  Option or a  Nonstatutory  Stock  Option.  However,
notwithstanding such designations,  to the extent that the aggregate Fair Market
Value of the Shares with respect to which Options  designated as Incentive Stock
Options are  exercisable  for the first time by any optionee during any calendar
year  (under  all plans of the  Company  or any  Parent or  Subsidiary)  exceeds
$100,000, such excess Options shall be treated as Nonstatutory Stock Options.

          (c) For purposes of Section  5(b),  Incentive  Stock  Options shall be
taken into account in the order in which they were granted,  and the Fair Market
Value of the Shares shall be  determined  as of the time the Option with respect
to such Shares is granted.

          (d) The Plan  shall not  confer  upon  any  Optionee  any  right  with
respect to  continuation  of  employment  or  consulting  relationship  with the
Company, nor shall it interfere in any way with his right or the Company's right
to terminate  his  employment or consulting  relationship  at any time,  with or
without cause.

     6.   Term of Plan.  The Plan shall become effective upon the  effectiveness
          ------------
of the Company's  Registration  Statement  (Reg. No.  333-43827)  filed with the
Securities  and  Exchange  Commission,  provided  the Plan  has been  previously
adopted  by the Board of  Directors  and  approved  by the  shareholders  of the
Company as described in Section 19 of the Plan. It shall  continue in effect for
a term of ten (10) years unless sooner terminated under Section 15 of the Plan.

                                      -5-
<PAGE>

     7.   Term of Option.  The term of each  Option  shall be the term stated in
          --------------
the Option Agreement;  provided, however, that in the case of an Incentive Stock
Option,  the term  shall be no more than ten (10)  years  from the date of grant
thereof  or  such  shorter  term as may be  provided  in the  Option  Agreement.
However,  in the case of an Option  granted to an Optionee  who, at the time the
Option is granted,  owns stock  representing  more than ten percent (10%) of the
voting power of all classes of stock of the Company or any Parent or Subsidiary,
the term of the Option shall be five (5) years from the date of grant thereof or
such shorter term as may be provided in the Option Agreement.

     8.   Option Exercise Price and Consideration.
          ---------------------------------------

          (a)  The per  share  exercise  price  for  the  Shares  to  be  issued
pursuant to exercise of an Option  shall be such price as is  determined  by the
Board, but shall be subject to the following:

               (i)  In the case of an Incentive Stock Option

                    (A)  granted to an  Employee  who,  at the time of the grant
     of such  Incentive  Stock  Option,  owns stock  representing  more than ten
     percent (10%) of the voting power of all classes of stock of the Company or
     any Parent or  Subsidiary,  the per Share  exercise  price shall be no less
     than 110% of the Fair Market Value per Share on the date of grant.

                    (B)  granted to any Employee, the per Share  exercise  price
     shall be no less than 100% of the Fair  Market  Value per Share on the date
     of grant.

               (ii) In the case of a Nonstatutory Stock Option

                    (A)  granted to a  person  who,  at the time of the grant of
     such Option,  owns stock  representing  more than ten percent  (10%) of the
     voting  power of all  classes  of stock of the  Company  or any  Parent  or
     Subsidiary,  the per Share exercise price shall be no less than 110% of the
     Fair Market Value per Share on the date of the grant.

                    (B)   granted to any  person,  the per Share exercise  price
     shall be no less than 85% of the Fair Market Value per Share on the date of
     grant.

          (b)  The consideration  to be  paid for the  Shares to be  issued upon
exercise of an Option,  including the method of payment,  shall be determined by
the  Administrator  (and,  in the case of an Incentive  Stock  Option,  shall be
determined  at the time of grant)  and may  consist  entirely  of (1) cash,  (2)
check,  (3)  promissory  note,  (4) other Shares which (x) in the case of Shares
acquired  upon  exercise of an Option either have been owned by the Optionee for
more than six months on the date of surrender or were not acquired,  directly or
indirectly,  from the  Company,  and (y) have a Fair Market Value on the date of
surrender  equal to the aggregate  exercise price of the Shares as to which said
Option shall be exercised, (5) authorization from the Company to retain from the
total number of Shares as to which the Option is exercised that

                                      -6-
<PAGE>

number of Shares having a Fair Market Value on the date of exercise equal to the
exercise  price  for the  total  number  of  Shares  as to which  the  option is
exercised,  (6) delivery of a properly  executed  exercise  notice together with
irrevocable  instructions  to a broker to  promptly  deliver to the  Company the
amount of sale or loan  proceeds  required  to pay the  exercise  price,  (7) by
delivering  an   irrevocable   subscription   agreement  for  the  Shares  which
irrevocably  obligates the option holder to take and pay for the Shares not more
than twelve months after the date of delivery of the subscription agreement, (8)
any  combination  of  the  foregoing  methods  of  payment,  or (9)  such  other
consideration  and method of payment  for the  issuance  of Shares to the extent
permitted under Applicable  Laws. In making its  determination as to the type of
consideration to accept, the Administrator  shall consider if acceptance of such
consideration may be reasonably expected to benefit the Company.

     9.   Exercise of Option.
          ------------------

          (a)  Procedure for  Exercise;  Rights  as a  Shareholder.  Any  Option
               ---------------------------------------------------
granted  hereunder  shall be exercisable at such times and under such conditions
as determined by the Administrator,  including performance criteria with respect
to the Company and/or the Optionee,  and as shall be permissible under the terms
of the Plan.

               An Option may not be exercised for a fraction of a Share.

               An Option shall be deemed to be exercised  when written notice of
such exercise has been given to the Company in accordance  with the terms of the
Option by the person  entitled to exercise  the Option and full  payment for the
Shares with  respect to which the Option is exercised  has been  received by the
Company.  Full payment may, as authorized by the  Administrator,  consist of any
consideration  and method of payment  allowable  under Section 8(b) of the Plan.
Until the issuance (as  evidenced by the  appropriate  entry on the books of the
Company or of a duly  authorized  transfer  agent of the  Company)  of the stock
certificate evidencing such Shares, no right to vote or receive dividends or any
other rights as a  shareholder  shall exist with respect to the Optioned  Stock,
notwithstanding the exercise of the Option. The Company shall issue (or cause to
be issued)  such stock  certificate  promptly  upon  exercise of the Option.  No
adjustment  will be made for a dividend or other right for which the record date
is prior to the date the stock  certificate  is issued,  except as  provided  in
Section 11 of the Plan.

               Exercise of an Option in any manner shall result in a decrease in
the number of Shares which thereafter may be available, both for purposes of the
Plan and for sale  under  the  Option,  by the  number of Shares as to which the
Option is exercised.

          (b)  Termination  of  Employment.  In the  event of  termination of an
               ---------------------------
Optionee's consulting  relationship or Continuous Status as an Employee with the
Company (as the case may be),  such  Optionee  may, but only within  ninety (90)
days (or such other  period of time as is  determined  by the  Board,  with such
determination in the case of an Incentive Stock Option being made at the time of
grant of the Option and not  exceeding  ninety (90) days) after the date of such
termination  (but in no event later than the expiration date of the term of such
Option as set forth

                                      -7-
<PAGE>

in the Option  Agreement),  exercise his Option to the extent that  Optionee was
entitled  to  exercise  it at the date of such  termination.  To the extent that
Optionee  was  not  entitled  to  exercise  the  Option  at  the  date  of  such
termination,  or if  Optionee  does not  exercise  such  Option to the extent so
entitled within the time specified herein, the Option shall terminate.

          (c)  Disability of Optionee. Notwithstanding the provisions of Section
               ----------------------
9(b) above, in the event of termination of an Optionee's consulting relationship
or  Continuous  Status as an  Employee  as a result  of his total and  permanent
disability (as defined in Section 22(e)(3) of the Code),  Optionee may, but only
within  twelve (12) months  from the date of such  termination  (but in no event
later than the  expiration  date of the term of such  Option as set forth in the
Option  Agreement),  exercise  the Option to the extent  otherwise  entitled  to
exercise it at the date of such termination. To the extent that Optionee was not
entitled to exercise the Option at the date of termination,  or if Optionee does
not  exercise  such Option to the extent so entitled  within the time  specified
herein, the Option shall terminate.

          (d)  Death of Optionee. In the event of the death of an Optionee,  the
               -----------------
Option may be  exercised,  at any time within  twelve (12) months  following the
date of death  (but in no event  later than the  expiration  date of the term of
such Option as set forth in the Option  Agreement),  by the Optionee's estate or
by a person  who  acquired  the  right to  exercise  the  Option by  bequest  or
inheritance,  but only to the extent the  Optionee  was entitled to exercise the
Option at the date of death.  To the extent that  Optionee  was not  entitled to
exercise the Option at the date of termination, or if Optionee does not exercise
such  Option to the extent so entitled  within the time  specified  herein,  the
Option shall terminate.

          (e)  Rule  16b-3.  Options granted to persons subject to Section 16(b)
               -----------
of the  Exchange  Act must  comply  with  Rule  16b-3  and  shall  contain  such
additional  conditions or restrictions as may be required  thereunder to qualify
for the maximum  exemption  from  Section 16 of the Exchange Act with respect to
Plan transactions.

          (f)  Buyout Provisions.   The Administrator  may at any  time offer to
               -----------------
buy out for a payment in cash or Shares, an Option previously granted,  based on
such terms and conditions as the  Administrator  shall establish and communicate
to the Optionee at the time that such offer is made.

     10.  Non-Transferability of Options.  The Option may not be sold,  pledged,
          ------------------------------
assigned, hypothecated,  transferred, or disposed of in any manner other than by
will or by the laws of descent or distribution and may be exercised,  during the
lifetime of the Optionee, only by the Optionee. The terms of the Option shall be
binding upon the executors, administrators, heirs, successors and assigns of the
Optionee.


                                      -8-
<PAGE>

     11.  Stock Purchase Rights.
          ---------------------

          (a)  Rights to Purchase.  Stock  purchase  rights may be issued either
               ------------------
alone,  in addition  to, or in tandem with other awards  granted  under the Plan
and/or cash awards made outside of the Plan. After the Administrator  determines
that it will offer stock  purchase  rights  under the Plan,  it shall advise the
offeree  in writing of the terms,  conditions  and  restrictions  related to the
offer,  including  the number of Shares  that such  person  shall be entitled to
purchase,  the price to be paid  (which  price shall not be less than 50% of the
Fair  Market  Value of the  Shares  as of the date of the  offer),  and the time
within which such person must accept such offer,  which shall in no event exceed
thirty  (30)  days  from  the  date  upon  which  the  Administrator   made  the
determination  to grant the stock purchase right. The offer shall be accepted by
execution of a Restricted Stock purchase agreement in the form determined by the
Administrator.

          (b)  Repurchase Option. Unless the Administrator determines otherwise,
               -----------------
the  Restricted  Stock purchase  agreement  shall grant the Company a repurchase
option  exercisable  upon  the  voluntary  or  involuntary  termination  of  the
purchaser's  employment  with the  Company  for any reason  (including  death or
Disability).   The  purchase  price  for  Shares  repurchased  pursuant  to  the
Restricted  Stock  purchase  agreement  shall be the original  price paid by the
purchaser and may be paid by cancellation  of any  indebtedness of the purchaser
to the Company.  The repurchase option shall lapse at such rate as the Committee
may determine.

          (c)  Other Provisions.  The Restricted Stock purchase  agreement shall
               ----------------
contain such other terms,  provisions and conditions not  inconsistent  with the
Plan as may be  determined  by the  Administrator  in its  sole  discretion.  In
addition, the provisions of Restricted Stock purchase agreements need not be the
same with respect to each purchaser.

          (d)  Rights as a  Shareholder.   Once  the  stock  purchase  right  is
               ------------------------
exercised,  the  purchaser  shall  have  the  rights  equivalent  to  those of a
shareholder, and shall be a shareholder when his or her purchase is entered upon
the records of the duly authorized  transfer agent of the Company. No adjustment
will be made for a dividend or other right for which the record date is prior to
the date the stock purchase right is exercised, except as provided in Section 13
of the Plan.

     12.  Stock  Withholding to  Satisfy  Withholding  Tax Obligations.   At the
          ------------------------------------------------------------
discretion of the Administrator,  Optionees may satisfy withholding  obligations
as  provided  in this  paragraph.  When an  Optionee  incurs  tax  liability  in
connection  with an Option or stock  purchase  right,  which  tax  liability  is
subject to tax  withholding  under  applicable  tax laws,  and the  Optionee  is
obligated to pay the Company an amount required to be withheld under  applicable
tax laws, the Optionee may satisfy the withholding tax obligation by electing to
have the Company withhold


                                      -9-
<PAGE>

from the Shares to be issued upon  exercise  of the Option,  or the Shares to be
issued in  connection  with the stock  purchase  right,  if any,  that number of
Shares  having a Fair Market Value equal to the amount  required to be withheld.
The Fair Market Value of the Shares to be withheld  shall be  determined  on the
date that the amount of tax to be withheld is to be determined (the "Tax Date").

          All elections by an Optionee to have Shares  withheld for this purpose
shall be made in writing in a form acceptable to the  Administrator and shall be
subject to the following restrictions:

          (a) the election must be made on or prior to the applicable Tax Date;

          (b) once made,  the election shall be irrevocable as to the particular
Shares of the Option or Right as to which the election is made;

          (c) all elections  shall be subject to the consent or  disapproval  of
the Administrator;

          (d) if the Optionee is subject to Rule 16b-3, the election must comply
with the  applicable  provisions  of Rule  16b-3  and shall be  subject  to such
additional  conditions or restrictions as may be required  thereunder to qualify
for the maximum  exemption  from  Section 16 of the Exchange Act with respect to
Plan transactions.

          In the  event  the  election  to have  Shares  withheld  is made by an
Optionee  and the Tax Date is deferred  under  Section 83 of the Code because no
election is filed under  Section 83(b) of the Code,  the Optionee  shall receive
the full  number of Shares  with  respect to which the Option or stock  purchase
right is  exercised  but such  Optionee  shall be  unconditionally  obligated to
tender back to the Company the proper number of Shares on the Tax Date.

          13.  Adjustments Upon Changes in Capitalization or Merger.  Subject to
               ----------------------------------------------------
any required action by the shareholders of the Company,  the number of shares of
Common Stock  covered by each  outstanding  Option,  and the number of shares of
Common Stock which have been  authorized  for issuance  under the Plan but as to
which no Options have yet been  granted or which have been  returned to the Plan
upon  cancellation or expiration of an Option, as well as the price per share of
Common Stock covered by each such outstanding  Option,  shall be proportionately
adjusted for any  increase or decrease in the number of issued  shares of Common
Stock  resulting  from a stock  split,  reverse  stock  split,  stock  dividend,
combination or  reclassification  of the Common Stock,  or any other increase or
decrease in the number of issued shares of Common Stock effected without receipt
of  consideration  by the Company;  provided,  however,  that  conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of  consideration."  Such adjustment shall be made by the Board,
whose  determination  in that respect  shall be final,  binding and  conclusive.
Except as  expressly  provided  herein,  no issuance by the Company of shares of
stock of any class, or securities convertible into

                                      -10-
<PAGE>

shares of stock of any class,  shall affect, and no adjustment by reason thereof
shall be made with  respect  to, the  number or price of shares of Common  Stock
subject to an Option.

          In the  event  of  the  proposed  dissolution  or  liquidation  of the
Company, the Board shall notify the Optionee at least fifteen (15) days prior to
such proposed action.  To the extent it has not been previously  exercised,  the
Option will terminate  immediately  prior to the  consummation  of such proposed
action.  In the event of a merger or  consolidation  of the Company with or into
another  corporation  or the sale of all or  substantially  all of the Company's
assets (hereinafter,  a "merger"),  the Option shall be assumed or an equivalent
option  shall be  substituted  by such  successor  corporation  or a  parent  or
subsidiary  of such  successor  corporation.  In the event  that such  successor
corporation  does not agree to assume the Option or to  substitute an equivalent
option, the Board shall, in lieu of such assumption or substitution, provide for
the  Optionee to have the right to exercise the Option as to all of the Optioned
Stock,  including  Shares  as  to  which  the  Option  would  not  otherwise  be
exercisable.  If the  Board  makes  an  Option  fully  exercisable  in  lieu  of
assumption or substitution in the event of a merger,  the Board shall notify the
Optionee that the Option shall be fully exercisable for a period of fifteen (15)
days  from the date of such  notice,  and the  Option  will  terminate  upon the
expiration of such period. For the purposes of this paragraph,  the Option shall
be considered  assumed if, following the merger, the Option or right confers the
right to  purchase,  for each Share of stock  subject to the Option  immediately
prior to the merger, the consideration (whether stock, cash, or other securities
or  property)  received in the merger by holders of Common  Stock for each Share
held on the  effective  date of the  transaction  (and if holders were offered a
choice of  consideration,  the type of consideration  chosen by the holders of a
majority  of  the  outstanding  Shares);   provided,   however,   that  if  such
consideration  received  in the  merger  was  not  solely  common  stock  of the
successor  corporation  or its  Parent,  the Board may,  with the consent of the
successor  corporation and the participant,  provide for the consideration to be
received upon the exercise of the Option, for each Share of stock subject to the
Option,  to be solely  common stock of the successor  corporation  or its Parent
equal in Fair Market Value to the per share consideration received by holders of
Common Stock in the merger or sale of assets.

     14.  Time of Granting  Options.  The date of grant of an Option  shall, for
          -------------------------
all purposes,  be the date on which the  Administrator  makes the  determination
granting such Option,  or such other date as is determined by the Board.  Notice
of the  determination  shall be given to each  Employee or Consultant to whom an
Option is so granted within a reasonable time after the date of such grant.

     15.  Amendment and Termination of the Plan.
          -------------------------------------

          (a) Amendment and Termination. The Board may at any time amend, alter,
              -------------------------
suspend or  discontinue  the Plan, but no amendment,  alteration,  suspension or
discontinuation  shall be made which  would  impair  the rights of any  Optionee
under any grant theretofore made,  without his or her consent.  In addition,  to
the extent  necessary and desirable to comply with Rule 16b-3 under the Exchange
Act or with Section 422 of the Code (or any other  applicable law or regulation,
including the requirements of the NASD or an established  stock  exchange),  the

                                      -11-
<PAGE>

Company shall obtain shareholder approval of any Plan amendment in such a manner
and to such a degree as required.

          (b)  Effect  of   Amendment  or  Termination.  Any  such  amendment or
               ---------------------------------------
termination  of the Plan  shall not  affect  Options  already  granted  and such
Options  shall  remain  in full  force  and  effect as if this Plan had not been
amended or terminated, unless mutually agreed otherwise between the Optionee and
the Board, which agreement must be in writing and signed by the Optionee and the
Company.

     16.  Conditions  Upon  Issuance of  Shares.   Shares  shall  not be  issued
          -------------------------------------
pursuant to the exercise of an Option unless the exercise of such Option and the
issuance  and  delivery of such Shares  pursuant  thereto  shall comply with all
relevant provisions of law, including, without limitation, the Securities Act of
1933,  as amended,  the  Exchange  Act,  the rules and  regulations  promulgated
thereunder, and the requirements of any stock exchange upon which the Shares may
then be listed,  and shall be further subject to the approval of counsel for the
Company with respect to such compliance.

          As a condition to the  exercise of an Option,  the Company may require
the person  exercising  such Option to represent  and warrant at the time of any
such  exercise  that the  Shares are being  purchased  only for  investment  and
without  any  present  intention  to sell or  distribute  such Shares if, in the
opinion of counsel for the Company,  such a representation is required by any of
the aforementioned relevant provisions of law.

     17.  Reservation of Shares.   The  Company,  during the  term of this Plan,
          ---------------------
will at all times reserve and keep available  such  number  of  Shares  as shall
be sufficient to satisfy the requirements of the Plan.

          The inability of the Company to obtain  authority from any  regulatory
body having jurisdiction,  which authority is deemed by the Company's counsel to
be necessary  to the lawful  issuance  and sale of any Shares  hereunder,  shall
relieve the Company of any  liability in respect of the failure to issue or sell
such Shares as to which such requisite authority shall not have been obtained.

     18.  Agreements.  Options and stock purchase  rights shall be  evidenced by
          ----------
written agreements in such form as the Board shall approve from time to time.

     19.  Shareholder  Approval.   Continuance of the  Plan shall be  subject to
          ---------------------
approval by the  shareholders of the Company within twelve (12) months before or
after the date the Plan is adopted.  Such shareholder approval shall be obtained
in the degree and manner required under applicable state and federal law.


                                      -12-
<PAGE>

     20.  Information to Optionees.  The Company shall provide to each Optionee,
          ------------------
during the period for which such  Optionee has one or more Options  outstanding,
copies of all annual  reports and other  information  which are  provided to all
shareholders  of the Company.  The Company shall not be required to provide such
information  if the  issuance  of  Options  under  the  Plan is  limited  to key
employees  whose duties in  connection  with the Company  assure their access to
equivalent information.



                                      -13-



                                  EXHIBIT 5.1

             Opinion of Buchanan Ingersoll Professional Corporation

<PAGE>

                   Buchanan Ingersoll Professional Corporation
                         (Incorporated in Pennsylvania)
                              650 College Road East
                           Princeton, New Jersey 08540

                                                     December 8, 1999

DSET Corporation
1160 U.S. Highway 22 East
Bridgewater, New Jersey  08807

Gentlemen:

     We have acted as counsel to DSET Corporation, a New Jersey corporation (the
"Company"),  in  connection  with the filing by the  Company  of a  registration
statement on Form S-8 (the "Registration  Statement"),  under the Securities Act
of 1933, as amended,  relating to the  registration of an aggregate of 4,687,689
shares (the "Shares") of the Company's Common Stock, no par value, of which: (i)
1,253,834 have been issued pursuant to options previously granted by the Company
to its employees,  officers,  directors and consultants under the Company's 1993
Stock Option Plan (the "1993 Plan Shares"); (ii) 1,633,855 are issuable pursuant
to  options  previously  granted  by the  Company  to its  employees,  officers,
directors  and  consultants  upon the  exercise  of  options  granted  under the
Company's 1993 Stock Option Plan ("the 1993 Plan Option Shares"); (iii) 704 have
been  issued  pursuant  to  options  previously  granted  by the  Company to its
employees,  officers,  directors and consultants  under the Company's 1998 Stock
Plan (the "1998 Plan Shares"); and (iv) 1,799,296 are issuable by the Company to
its employees,  officers, directors and consultants upon the exercise of options
granted or to be  granted  under the  Company's  1998 Stock Plan (the "1998 Plan
Option Shares"). The 1993 Stock Option Plan and the 1998 Stock Plan are referred
to collectively as the "Plans."

     In  connection  with the  Registration  Statement,  we have  examined  such
corporate records and documents, other documents and such questions of law as we
have deemed necessary or appropriate for purposes of this opinion.  On the basis
of such examination, it is our opinion that:

          1)   The issuance of the Shares has been duly and validly authorized;

          2)   The 1993 Plan Shares and the 1998 Plan  Shares have been  legally
               issued  and are  fully  paid  and  non-assessable  shares  of the
               Company's Common Stock; and

          3)   The 1993 Plan Option Shares and the 1998 Plan Option Shares, when
               issued,  delivered and sold in  accordance  with the terms of the
               respective  Plan and the  stock  options,  or  other  instruments
               authorized  by such Plans,  granted or to be granted  thereunder,
               will be validly issued, fully paid and non-assessable.

     We  hereby  consent  to the  filing  of this  opinion  as  Exhibit 5 to the
Registration Statement.

                                    Very truly yours
                                    Buchanan Ingersoll Professional Corporation

                                    /s/   William J. Thomas, Esq.
                                    -----------------------------
                                    William J. Thomas, Esq.
                                    A Member of the Firm




                                  EXHIBIT 23.1

                     Consent of PricewaterhouseCoopers LLP
<PAGE>

                                                                    Exhibit 23.1

                        INDEPENDENT ACCOUNTANTS' CONSENT



     We hereby  consent to the  incorporation  by  reference  in the  Prospectus
constituting part of this Registration Statement on Form S-8 of our report dated
February 2, 1999 which appears in the 1998 Annual Report to Shareholders of DSET
Corporation on Form 10-K for the year ended December 31, 1998. We hereby consent
to the reference to us under the heading "Experts" in such Prospectus.





/s/ PRICEWATERHOUSECOOPERS LLP
Florham Park, NJ
December 7, 1999



                                  EXHIBIT 23.2

             Consent of Buchanan Ingersoll Professional Corporation
                 (contained in the opinion filed as Exhibit 5.1)




                                  EXHIBIT 24

                               Power of Attorney
        (contained on the signature page of this Registration Statement)



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