LEGATO SYSTEMS INC
S-3, 1999-04-02
PREPACKAGED SOFTWARE
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   As filed with the Securities and Exchange Commission on April 2, 1999
                                                   Registration No. 333-

================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              --------------------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                              --------------------

                              LEGATO SYSTEMS, INC.
             (Exact Name of Registrant as Specified in Its Charter)

                 Delaware                                   94-3077394
       (State or Other Jurisdiction              (I.R.S. Employer Identification
     of Incorporation or Organization)                       Number)

                                3210 Porter Drive
                               Palo Alto, CA 94304
                                 (650) 812-6000
    (Address, Including Zip Code, and Telephone Number, Including Area Code,
                  of Registrant's Principal Executive Offices)

                                 Stephen C. Wise
                             Chief Financial Officer
                              Legato Systems, Inc.
                                3210 Porter Drive
                               Palo Alto, CA 94304
                                 (650) 812-6000
                (Name, Address, Including Zip Code, and Telephone
                    Number, Including Area Code, of Agent for
           Service) The Commission is requested to send copies of all
                               communications to:

                         Robert V. Gunderson, Jr., Esq.
                            Daniel E. O'Connor, Esq.
                            Gunderson Dettmer Stough
                      Villeneuve Franklin & Hachigian, LLP
                             155 Constitution Drive
                          Menlo Park, California 94025
                                 (650) 321-2400

     Approximate date of commencement of proposed sale to the public: As soon as
practicable after this Registration Statement becomes effective.

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

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

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

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

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

<TABLE>
<CAPTION>
                                                  CALCULATION OF REGISTRATION FEE
- ----------------------------- ---------------------- ------------------- ------------------------ ------------------
                                                     Proposed   Maximum
   Title of each class of         Amount to be       Offering Price         Proposed Maximum          Amount of
Securities to be Registered        Registered         per Security(1)      Aggregate Offering     Registration Fee
                                                                                Price(1)
- ----------------------------- ---------------------- ------------------- ------------------------ ------------------
<S>                              <C>                       <C>                   <C>                 <C>
 Common Stock, no par value      720,000 shares            $47.00                $47.00              $9,408.00

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

<FN>
(1) The price of $47.00  per  share,  which was the  average of the high and low
    prices of the Common Stock on the Nasdaq  National  Market on April 1, 1999
    is set forth solely for the purpose of calculating the  registration  fee in
    accordance with Rule 457(c) of the Securities Act of 1933, as amended.
</FN>
</TABLE>


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



<PAGE>


                   Subject to Completion, dated April 2, 1999

                                 720,000 Shares

                              LEGATO SYSTEMS, INC.

                                  Common Stock

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

              INVESTING IN OUR COMMON STOCK INVOLVES CERTAIN RISKS.
                     SEE "RISK FACTORS" STARTING ON PAGE 4.

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




         The selling  stockholders  listed on page 13 are  offering  and selling
720,000 shares of our common stock under this prospectus.


         The selling stockholders may offer their Legato stock through public or
private transactions, on or off the Nasdaq National Market, at prevailing market
prices, or at privately negotiated prices.


         Our common  stock is traded on The  Nasdaq  National  Market  under the
symbol  "LGTO." On April 1, 1999,  the closing bid price of the common stock on
The Nasdaq National Market was $47.00 per share.


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


         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.

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




<PAGE>




                  The date of this Prospectus is April __, 1999




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

                                TABLE OF CONTENTS

                                                                         Page

Business of Legato Systems, Inc.                                            3
Recent Developments                                                         3
Risk Factors                                                                4
Forward-Looking Statements                                                 12
Use of Proceeds                                                            12
Selling Stockholders                                                       13
Plan of Distribution                                                       14
Legal Matters                                                              14
Experts                                                                    14
Where You Can Find More Information                                        14


<PAGE>


                             THE BUSINESS OF LEGATO

         Legato  develops,  licenses,  markets and supports a broad,  integrated
suite of storage management software applications operating on multiple computer
systems.  Our  NetWorker  family of  software  products,  from which we derive a
substantial amount of our revenues,  and Global Enterprise  Management  Systems,
support many storage  management server platforms,  such as UNIX and Windows NT,
and can accommodate a variety of servers, clients,  applications,  databases and
storage devices.  We license our products through  resellers and directly to end
users in North America, Europe and Asia Pacific. We also license our source code
in exchange for initial licensing fees to original  equipment  manufacturers and
receive ongoing  royalties from the original  equipment  manufacturers'  product
sales.  Substantially  all of the  original  equipment  manufacturers  are large
computer system and software suppliers located in the United States,  Europe and
Asia Pacific.

         Our principle  executive offices are located at 3210 Porter Drive, Palo
Alto, California 94304 and our telephone number is (650) 812-6000.



                          RECENT DEVELOPMENTS AT LEGATO

     On October 25,  1998,  we entered  into a  definitive  agreement to acquire
Qualix Group,  Inc. (dba FullTime  Software,  Inc.), a developer of distributed,
enterprise-wide,   cross-platform,  adaptive  computing  solutions  that  enable
customers to proactively  manage  application  service level  availability.  The
agreement  provides for the issuance of 1,721,000  shares of our common stock in
exchange  for all the  common  stock and  options  of  Qualix  Group,  Inc.  The
transaction  is expected  to be  completed  by the end of April of 1999,  and is
subject to the  satisfaction  of  standard  closing  conditions,  including  the
approval  of Qualix  Group,  Inc.  stockholders.  We expect to  account  for the
transaction as a pooling-of-interests.


         On  April  1,  1999,  we  completed  the  acquisition  of  Intelliguard
Software,   Inc.  and  O.R.P.,  Inc.,  developers  of  standards-based   storage
management  solutions for storage area networks.  In this document,  we refer to
Intelliguard Software, Inc. and O.R.P., Inc. collectively as "Intelliguard".  We
issued  720,000  shares of our common stock and provided cash  consideration  of
$9,112,500 for all of the outstanding stock and stock rights of Intelliguard. We
accounted for the transaction as a business purchase combination.


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

                This Prospectus includes trademarks of Legato and
                              other corporations.
                         ------------------------------



<PAGE>


                                  RISK FACTORS


     OUR QUARTERLY OPERATING RESULTS ARE VOLATILE AND UNCERTAIN.  OUR FAILURE TO
MEET PUBLIC  MARKET  ANALYSTS'  EXPECTATIONS  WOULD HARM THE MARKET PRICE OF OUR
COMMON STOCK.

     Our quarterly operating results have varied in the past and may vary in the
future.  We  believe  that  period-to-period   comparisons  of  our  results  of
operations  are not  meaningful  and should not be relied upon as indications of
future  performance.  We believe  that our  operating  results  may be below the
expectations  of public market  analysts and investors in some future quarter or
quarters. In the past, our common stock price has on occasion declined following
earnings  announcements.  Our failure to meet  analyst or investor  expectations
would likely seriously harm the market price of our common stock.

     We  cannot  predict  our  future  revenue  with any  significant  degree of
certainty for several reasons including:

     -    Product  revenue in any quarter is  substantially  dependent on orders
          booked and shipped in that quarter, since we operate with virtually no
          order backlog;

     -    We do not recognize  revenue on sales to domestic  distributors  until
          the products are sold through to end-users;  o The storage  management
          market is rapidly evolving; o Our sales cycles vary substantially from
          customer  to   customer,   in  large  part  because  we  are  becoming
          increasingly  dependent upon larger enterprise license transactions to
          corporate  customers.   Such  transactions  include  product  license,
          service and support components and take a long time to complete;

     -    The timing of large orders can  significantly  affect revenue within a
          quarter; and

     -    License and royalty  revenue are  difficult to  forecast.  Our royalty
          revenue  is  dependent  upon  product  license  sales by OEMs of their
          products that  incorporate  our software.  Accordingly,  these royalty
          revenues are subject to OEMs' product cycles, which are also difficult
          to predict. Fluctuations in licensing activity from quarter to quarter
          further  impact  royalty   revenues,   because  initial  license  fees
          generally  are  non-recurring  and  recognized  upon the  signing of a
          license agreement.

     Our expense  levels are  relatively  fixed and are based,  in part,  on our
expectations of our future revenue.  Consequently,  if revenue levels fall below
our  expectations,  our net income will decrease because only a small portion of
our expenses varies with our revenues.


     OUR  MARKET  IS  HIGHLY  COMPETITIVE  AND  IF  WE  ARE  UNABLE  TO  COMPETE
SUCCESSFULLY, OUR BUSINESS WILL BE HARMED.

     We operate in the enterprise storage management market,  which is intensely
competitive,  highly fragmented and characterized by rapidly changing technology
and evolving standards. Competitors vary in size and in the scope and breadth of
the products and services offered.

     We  expect  to  encounter  new  competitors  as we enter  new  markets.  In
addition,  many  of our  existing  competitors  are  broadening  their  platform
coverage.  We  also  expect  increased  competition  from  systems  and  network
management  companies,  especially those that have  historically  focused on the
mainframe  market and are  broadening  their focus to include the  client/server
market.  In addition,  since there are  relatively  low barriers to entry in the
software market,  we expect  additional  competition from other  established and
emerging companies. We also expect that competition will increase as a result of
future software industry consolidations.  Increased competition could harm us by
causing, among other things:

     -    Price reductions;

     -    Reduced gross margins; and

     -    Loss of market share.

     Many  of our  current  and  potential  competitors  have  longer  operating
histories and have substantially greater financial,  technical, sales, marketing
and other  resources,  as well as greater name recognition and a larger customer
base, than we have. As a result,  certain current and potential  competitors can
respond  more  quickly to new or emerging  technologies  and changes in customer
requirements.  They  can  also  devote  greater  resources  to the  development,
promotion,  sale and  support  of  their  products.  In  addition,  current  and
potential competitors may establish  cooperative  relationships among themselves
or with third parties. If so, new competitors or alliances among competitors may
emerge and rapidly  acquire  significant  market  share.  In  addition,  network
operating  system  vendors  could  introduce new or upgrade  existing  operating
systems or environments that include  functionality  offered by our products. If
so, our  products  could be  rendered  obsolete  and  unmarketable.  For all the
foregoing  reasons,  we may not be able to  compete  successfully,  which  would
seriously harm our business, operating results and financial condition.


     WE DEPEND ON OUR NETWORKER  PRODUCT LINE. A DECLINE IN THE PRICE OF, DEMAND
FOR, OR MARKET ACCEPTANCE OF, NETWORKER WOULD SERIOUSLY HARM OUR BUSINESS.

     We currently derive, and expect to continue to derive, a substantial amount
of our revenue from our  NetWorker  software  products and related  services.  A
decline in the price of or demand  for  NetWorker,  or failure to achieve  broad
market  acceptance of NetWorker,  would  seriously harm our business,  operating
results  and  financial  condition.  We cannot  reasonably  predict  NetWorker's
remaining life for several reasons, including:

     -    The recent emergence of our market;

     -    The effect of new products, applications or product enhancements;

     -    Technological changes in the network storage management environment in
          which NetWorker operates; and

     -    Future competition.


     IF WE DO NOT RESPOND TO RAPID  TECHNOLOGICAL  CHANGES OUR EXISTING PRODUCTS
COULD BECOME OBSOLETE.

     The markets  for our  products  are  characterized  by rapid  technological
change, changing customer needs, frequent new software product introductions and
evolving  industry  standards.   The  introduction  of  products  embodying  new
technologies  and the  emergence  of new  industry  standards  could  render our
existing  products  obsolete  and  unmarketable.  To be  successful,  we need to
develop  and   introduce   new  software   products,   including  new  releases,
applications   and   enhancements   on  a  timely  basis  that  keep  pace  with
technological  developments  and  emerging  industry  standards  and address the
increasingly sophisticated needs of our customers.

We may:

     -    Fail to develop and market new products that respond to  technological
          changes or evolving industry standards; o Experience difficulties that
          could delay or prevent the successful  development,  introduction  and
          marketing of these new products; or

     -    Fail to develop new products that adequately meet the  requirements of
          the marketplace or achieve market acceptance

If so,  our  business,  operating  results  and  financial  condition  would  be
seriously harmed.

     As of December  31,  1998,  we had 193  employees  engaged in research  and
development,  which  represented  29% of our total  workforce.  If potential new
products  are  delayed  or do  not  achieve  market  acceptance,  our  business,
operating results and financial  condition would be seriously harmed. We plan to
introduce and market  several  potential new products in the next twelve months.
Some of our competitors currently offer certain of these potential new products.
Such potential new products are subject to significant  technical  risks. We may
fail to introduce  such  potential  new products on a timely basis or at all. In
the past, we have experienced delays in the commencement of commercial shipments
of our new products.  Such delays caused customer frustrations and delay or loss
of product  revenue.  If  potential  new  products are delayed or do not achieve
market acceptance, our business, operating results and financial condition would
be seriously harmed.  In the past, we have also experienced  delays in purchases
of our  products  by  customers  anticipating  our launch of new  products.  Our
business, operating results and financial condition would be seriously harmed if
customers defer material orders in anticipation of new product introductions.


     WE RELY ON  ENTERPRISE  LICENSE  TRANSACTIONS  AND FAILURE TO  SUCCESSFULLY
MARKET OUR PRODUCTS IN ENTERPRISE-LEVEL TRANSACTIONS WOULD HARM OUR BUSINESS.

     In the past, we marketed our products at the  department-level of corporate
customers.  Within  the last two  years,  we began to pursue  larger  enterprise
license  transactions  with  corporate  customers.  We may fail to  complete  or
increase the number of such larger enterprise license transactions. Such failure
would seriously harm our business,  operating  results and financial  condition.
Our operating  results are  sensitive to the timing of such orders.  Such orders
are difficult to manage and predict, because:

     -    The sales cycle is typically  lengthy,  generally lasting three to six
          months, and varies substantially from transaction to transaction;

     -    They often include product license, service and support components;

     -    They typically involve significant technical evaluation and commitment
          of capital and other resources;  and o Customers'  internal procedures
          frequently cause delays in orders.  Such internal  procedures  include
          approval  of  large  capital   expenditures,   implementation  of  new
          technologies within their networks,  and testing new technologies that
          affect key operations.

Due to the large size of enterprise  transactions,  if orders  forecasted  for a
specific  transaction for a particular quarter are not realized in that quarter,
our operating results for that quarter may be seriously harmed.

     Historically,  we have not had a  separate  large  enterprise  or  national
accounts  sales force and only within the last eighteen  months have we begun to
develop direct sales groups focused on these larger accounts.  To succeed in the
national  accounts  market,  we will be required to continue to  transition  our
existing sales forces into enterprise level sales groups, and attract and retain
qualified personnel. Such personnel will require training about and knowledge of
our  products.  We  may  not be  successful  in  creating  the  necessary  sales
organization  or  in  attracting,   retaining  or  training  these  individuals.
Historically,  we have licensed our products at the departmental level.  Success
in the enterprise and national accounts market will require, among other things,
establishing  and continuing to develop  relationships  and contacts with senior
technology  officers at these accounts.  Our business,  financial  condition and
results  of  operations  would be  seriously  harmed if our  sales  force is not
successful in these efforts.


     WE RELY ON INDIRECT  SALES CHANNELS AND IF THESE INDIRECT SALES CHANNELS DO
NOT PERFORM ADEQUATELY, OUR REVENUES WOULD DECLINE.

     We  rely  significantly  on  our  distributors,   systems  integrators  and
resellers for the marketing and  distribution  of our products.  Our  agreements
with  resellers  are generally not exclusive and in many cases may be terminated
by either party without cause.  Many of these resellers carry product lines that
are competitive with our products.  These resellers may not give a high priority
to the  marketing  of our  products.  We may not be able  to  retain  any of our
current resellers or successfully recruit new resellers. Any such changes in our
distribution  channels could seriously harm our business,  operating results and
financial condition.

     Our strategy is also to increase the  proportion of our customers  licensed
through OEMs. We may fail to achieve this strategy.  We are currently investing,
and intend to  continue  to invest  resources  to  develop  this  channel.  Such
investments could seriously harm our operating  margins.  We depend on our OEMs'
ability to develop new  products,  applications  and product  enhancements  on a
timely and  cost-effective  basis  that will meet  changing  customer  needs and
respond to emerging industry standards and other technological changes. Our OEMs
may not effectively meet these technological challenges. These OEMs:

     -    Are not within our control;

     -    May  incorporate  the  technologies  of  other  companies  into  their
          products in addition to, or to the exclusion of, our technologies; and

     -    Are not obligated to purchase products from us. In addition,  our OEMs
          generally have exclusive  rights to our technology on their platforms,
          subject to certain minimum royalty obligations.

Our OEMs may not continue to carry our products.  The  inability to recruit,  or
the loss of, important OEMs could seriously harm our business, operating results
and financial condition.


     WE  DEPEND  ON   INTERNATIONAL   REVENUE  AND  THEREFORE  OUR  BUSINESS  IS
SUSCEPTIBLE TO NUMEROUS RISKS ASSOCIATED WITH INTERNATIONAL OPERATIONS.

     Our continued growth and  profitability  will require further  expansion of
our international  operations.  To successfully expand international operations,
we must:

     -    Establish additional international operations;

     -    Hire addition personnel; and

     -    Recruit additional international resellers.

These  efforts will  require  significant  management  attention  and  financial
resources and could seriously harm our operating margins.  If we fail to further
expand our international operations in a timely manner, our business,  operating
results and financial  condition could be seriously harmed. In addition,  we may
fail to maintain or increase  international market demand for our products.  Our
international  sales are currently  denominated in U.S. dollars.  An increase in
the value of the U.S.  dollar  relative  to  foreign  currencies  could make our
products more expensive and,  therefore,  potentially  less competitive in those
markets.  In some markets,  localization of our products is essential to achieve
market  penetration.  We may incur  substantial  costs and experience  delays in
localizing  our  products.  We may fail to  generate  significant  revenue  from
localized products.

     Additional  risks  inherent  in  our  international   business   activities
generally include:

     -    Significant  reliance on our  distributors  and other resellers who do
          not offer our products exclusively;

     -    Unexpected changes in regulatory requirements;

     -    Tariffs and other trade barriers;

     -    Lack of acceptance of localized products, if any, in other countries;

     -    Longer accounts receivable payment cycles;

     -    Difficulties in managing international operations;

     -    Potentially  adverse tax consequences,  including  restrictions on the
          repatriation of earnings;

     -    The burdens of complying  with a wide variety of  international  laws;
          and

     -    The risks related to the recent global economic turbulence and adverse
          economic circumstances in Asia.

The occurrence of such factors could seriously harm our international sales and,
consequently, our business, operating results and financial condition.


      IN ORDER TO  PROPERLY  MANAGE  OUR GROWTH  AND  EXPANSION,  WE MAY NEED TO
IMPROVE AND IMPLEMENT NEW SYSTEMS, PROCEDURES AND CONTROLS.

     We have  recently  experienced  a period of  significant  expansion  of our
operations.   Our  headcount   increased  from  303  at  December  31,  1996  to
approximately  738 at  February  28,  1999 and will  increase  further  upon the
integration of employees from our recent  acquisition of Intelliguard.  Also, we
expect our headcount to increase  upon the closing of the Full Time  acquisition
expected to be completed by the end of April of 1999. This growth has placed and
will place a significant  strain upon our management  systems and resources.  We
plan to expand the geographic  scope of our customer base and  operations.  This
expansion has resulted and will continue to result in substantial demands on our
management resources.

     From time to time, we receive customer  complaints about the timeliness and
accuracy of customer support. We plan to add customer support personnel in order
to address current customer support needs. If we are not successful  hiring such
personnel,  our business,  operating  results and financial  condition  could be
seriously  harmed.  Our  ability to  compete  effectively  and to manage  future
expansion of our operations, if any, will require us to:

     -    Continue to improve our financial and management  controls,  reporting
          systems and procedures on a timely basis; and

     -    Expand, train and manage our employee work force.

     Our failure to do so could seriously harm our business,  operating  results
and financial condition.


     If We Do Not Successfully  Integrate Recent and Pending  Acquisitions,  Our
Business Would Be Harmed.

     We  expect  that  we will  face  numerous  challenges  in  integrating  the
operations of recently completed and pending acquisitions. On August 6, 1998, we
acquired Software Moguls, Inc. ("SMI"), a developer of advanced backup-retrieval
products for the Windows NT and UNIX environments. On April 1, 1999, we acquired
Intelliguard Software,  Inc., a developer of standards-based  storage management
solutions for storage area networks.

     On October 25,  1998,  we entered  into a  definitive  agreement to acquire
Qualix Group,  Inc. (dba FullTime  Software,  Inc.), a developer of distributed,
enterprise-wide,  cross-platform,  adaptive computing solutions. The acquisition
is  expected  to be  completed  by the end of  April  of  1999,  subject  to the
satisfaction of standard closing conditions, including shareholder approval.

     We  may  make  additional  acquisitions  in  the  future.  Acquisitions  of
companies, products or technologies entail numerous risks, including:

     -    An  inability  to  successfully  assimilate  acquired  operations  and
          products;

     -    Diversion of management's attention;

     -    Loss of key employees of acquired companies;

     -    Substantial transaction costs; and

     -    Substantial  additional costs charged to operations as a result of the
          failure to consummate acquisitions.

     Some  of the  products  we  acquired  may  require  significant  additional
development  before they can be marketed and may not generate revenues at levels
we  anticipate.  Moreover,  any  future  acquisitions  may  result  in  dilutive
issuances of our equity  securities,  the  incurrence  of debt,  large  one-time
write-offs  and the creation of goodwill or other  intangible  assets that could
result in  amortization  expense.  Any such  factors  could  seriously  harm our
business, financial condition and results of operations.


     IF THE  STORAGE  MANAGEMENT  MARKET DOES NOT  CONTINUE  TO GROW,  OUR SALES
OPPORTUNITIES WOULD BE LIMITED.

     All of our  business  is in the  storage  management  market.  The  storage
management  market is still an emerging market and may not continue to grow. Our
future  financial  performance  will depend in large part on continued growth in
the  number  of  organizations  adopting  company-wide  storage  and  management
solutions for their client/server computing  environments.  If this market fails
to grow or  grows  more  slowly  than we  currently  anticipate,  our  business,
operating results and financial conditions would be seriously harmed.


     WE RELY ON OUR KEY PERSONNEL.

     Our  future  performance  depends  on the  continued  service  of  our  key
technical and senior management  personnel.  None of our key technical or senior
management  personnel  is  bound  by an  employment  agreement.  The loss of the
services of one or more of our officers or other key employees  could  seriously
harm our business, operating results and financial condition. Our future success
also depends on our  continuing  ability to attract and retain highly  qualified
technical and managerial  personnel.  Competition for such personnel is intense,
and we may fail to retain our key technical and managerial employees or attract,
assimilate or retain other highly qualified  technical and managerial  personnel
in the future.


     PROTECTION OF OUR INTELLECTUAL PROPERTY IS LIMITED.

Our success  depends  significantly  upon protecting our  intellectual  property
which  are our most  important  assets.  Despite  our  efforts  to  protect  our
proprietary  rights,  unauthorized  parties may  attempt to copy  aspects of our
products  or to  obtain  and use  information  that we  regard  as  proprietary.
Policing unauthorized use of our products is difficult,  and software piracy can
be expected to be a persistent problem. In licensing our products, other than in
enterprise license transactions,  we rely on "shrink wrap" licenses that are not
signed  by  licensees.  Such  licenses  may be  unenforceable  under the laws of
certain  jurisdictions.  In  addition,  the laws of some other  countries do not
protect  our  proprietary  rights  to as great an  extent  as do the laws of the
United  States.  Our  means of  protecting  our  proprietary  rights  may not be
adequate.   Our  competitors  may  independently   develop  similar  technology,
duplicate  our  products  or  design  around  patents  issued  to  us  or  other
intellectual property rights of ours.

     From time to time, we have  received  claims that we are  infringing  third
parties'  intellectual  property  rights.  In the  future,  we may be subject to
claims of  infringement  by third  parties  with  respect  to  current or future
products,  trademarks  or other  proprietary  rights.  We expect  that  software
product  developers will  increasingly be subject to infringement  claims as the
number  of  products  and  competitors  in our  industry  segment  grows and the
functionality  of products in different  industry  segments  overlaps.  Any such
claims,  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   agreements  with  third  parties.   If  such  royalty  or  licensing
agreements,  if  required,  are not  available  on terms  acceptable  to us, our
business, operating results and financial condition could be seriously harmed.


     DEFECTS IN OUR PRODUCTS WOULD HARM OUR BUSINESS.

     Our license  agreements  with our customers  typically  contain  provisions
designed to limit exposure to potential  product  liability claims. In licensing
our products, other than in enterprise license transactions,  we rely on "shrink
wrap"  licenses  that  are  not  signed  by  licensees.  Such  licenses  may  be
unenforceable under the laws of certain jurisdictions.  As a result of these and
other  factors,  limitation  of  liability  provisions  contained in our license
agreements  may not be  effective.  Our  products  can be used  to  manage  data
critical  to  organizations.  As a result,  the sale and  support of products we
offer may entail the risk of product  liability  claims.  A  successful  product
liability claim brought against us could seriously harm our business,  operating
results and financial condition.


     YEAR 2000 ISSUES COULD AFFECT OUR BUSINESS.

     Many currently  installed  computer  systems and software  products include
coding to accept only two digit entries in the date code field.  These date code
fields will need to accept four digit entries to distinguish  21st century dates
from 20th century dates.  Our computer  systems and/or  software will need to be
upgraded  to comply  with such "Year  2000"  requirements.  Systems  that do not
properly  recognize such  information  could generate  erroneous data or cause a
system to fail.  Significant  uncertainty exits the software industry concerning
the potential effects associated with such problems.

     We have conducted Year 2000 compliance  reviews for current versions of our
products. The reviews include:

     -    Assessment;

     -    Implementation;

     -    Validation testing; and

     -    Contingency planning.

     We respond to customer concerns about our products on a case-by-case basis.
Although we believe our software products are Year 2000 compliant,  our software
products may not contain all the  necessary  software  routines and programs for
the accurate  calculation,  display,  storage and manipulation of data involving
dates.  Failure of our software  products to contain all the necessary  software
routines  and  programs  for the  accurate  calculation,  display,  storage  and
manipulation  of  data  involving  dates  would  seriously  harm  our  business,
operating results and financial condition.

     To the extent  information is publicly  available we have assessed the Year
2000 compliance status of our customers. If our current or future customers fail
to achieve Year 2000 compliance or we divert technology  expenditures to address
Year 2000 compliance problems, our business, results of operations, or financial
condition would be seriously harmed.

     We have tested  software  obtained from third parties that is  incorporated
into our products,  and seek assurances  from vendors that licensed  software is
Year 2000 compliant. Despite such testing and assurances,  products incorporated
into our products may contain  undetected errors or defects associated with Year
2000 date  functions.  Known or unknown  errors or defects in our  products  may
result in:

     -    Delay or loss of revenue;

     -    Diversion of development resources;

     -    Damage to our reputation; or

     -    Increased service and warranty costs.

The  occurrence  of any of the  foregoing  could  seriously  harm our  business,
operating results, or the financial condition.

     We believe the  software and  hardware we use  internally  comply with Year
2000 requirements. During 1998, we replaced or upgraded much of our internal use
hardware and software. In addition, we are not aware of any material operational
issues or costs associated with preparing our internal use software and hardware
for the  Year  2000.  However,  serious,  unanticipated  negative  consequences,
including  material  costs  caused  by  undetected  errors  or  defects  in  the
technology used in our internal  systems may occur. The occurrence of any of the
foregoing  could  seriously  harm our business,  operating  results or financial
condition.

     We have funded our Year 2000  compliance  review from  operating cash flows
and have not  separately  accounted  for these costs in the past.  We will incur
additional amounts related to the Year 2000 compliance review including:

     -    Administrative personnel to manage the review; and

     -    Outside  contractors to provide technical advice and technical support
          for our products, product engineering, and customer satisfaction.

     We are currently developing  contingency plans to be implemented as part of
our efforts to identify and correct Year 2000 problems. Depending on the systems
affected, these plans include:

     -    Accelerated replacement of affected equipment or software;

     -    Short to medium-term use of backup equipment and software;

     -    Increased work hours for our personnel or use of contract personnel to
          correct (on an accelerated schedule) any Year 2000 problems that arise
          or to provide manual workarounds for information systems; and

     -    Other similar approaches

If we are  required  to  implement  any of  these  contingency  plans,  it could
seriously  harm our business,  financial  condition and operating  results.  Our
ability to  achieve  Year 2000  compliance  and the level of  incremental  costs
associated therewith, could be seriously impacted by, among other things:

     -    The availability and cost of programming and testing resources;

     -    Vendors' ability to modify proprietary software; and

     -    Unanticipated problems identified in the ongoing compliance review.



<PAGE>


                          FORWARD - LOOKING STATEMENTS


         This  prospectus,  including  the documents  incorporated  by reference
herein,   contains   forward-looking   statements   that   involve   risks   and
uncertainties.  Statements  contained  in this  Prospectus  or  incorporated  by
reference herein that are not purely historical are  forward-looking  statements
within the meaning of Section 27A of the  Securities  Act and Section 21E of the
1934 Act, including  statements  regarding the Legato's  expectations,  beliefs,
intentions or strategies  regarding the future. All  forward-looking  statements
included in this  document are based on  information  available to the Legato on
the  date  hereof,   and  Legato  assumes  no  obligation  to  update  any  such
forward-looking statements. Legato's actual results could differ materially from
those  anticipated  in these  forward-looking  statements as a result of certain
factors, including, but not limited to, those set forth in this prospectus under
"Risk Factors." You should  carefully  consider the risks described in the "Risk
Factors"  section,  in  addition  to the  other  information  set  forth in this
prospectus and  incorporated  by reference  herein,  before making an investment
decision.


                                 USE OF PROCEEDS


         All net  proceeds  from the sale of Legato  common stock will go to the
stockholders  who offer and sell  their  shares.  Accordingly,  Legato  will not
receive any proceeds from the sale of the shares by the selling stockholders.




<PAGE>


                              SELLING STOCKHOLDERS



         The  following  table sets forth  certain  information,  as of April 1,
1999,  with respect to the number of shares of common stock owned by the selling
stockholders  named  below  and as  adjusted  to give  effect to the sale of the
shares  offered  hereby.  The  shares  are being  registered  to  permit  public
secondary  trading of the  shares,  and the selling  stockholders  may offer the
shares for resale  from time to time.  Based  upon  38,082,575  shares of common
stock  outstanding  on March  29,  1999,  George B.  Wilson is the only  selling
stockholder that owns more than 1% of the outstanding stock of Legato. See "Plan
of Distribution."


         The shares being offered by the selling stockholders were acquired from
Legato in our  acquisition  of  Intelliguard  Software,  Inc. and O.R.P.,  Inc.,
pursuant to a stock purchase agreement signed on January 27, 1999. The shares of
common  stock  were  issued  pursuant  to an  exemption  from  the  registration
requirements  of the  Securities  Act. The selling  stockholders  represented to
Legato that they were  acquiring the shares for  investment  and with no present
intention of distributing the shares.

         Legato has filed with the SEC, under the Securities Act, a registration
statement on Form S-3, of which this  prospectus  forms a part,  with respect to
the resale of the shares from time to time on The Nasdaq  National  Market or in
privately-negotiated  transactions. Legato has agreed to use its best efforts to
keep such registration statement effective until the earlier of such time as (i)
all the shares  have been sold or (ii) all the shares may be sold under Rule 144
of the Securities Act in any three-month period.

         The Shares offered by this  prospectus may be offered from time to time
by the selling stockholders named below:

<TABLE>
<CAPTION>

                                 Shares Beneficially Owned                            Shares Beneficially Owned
                                    Prior to Offering                                    After the Offering

Name and Address of Selling      Number of                       Number of Shares     Number of
Stockholders                     Shares          Percent         Being Offered        Shares        Percent
- ------------                     ------          -------         -------------        ------        -------
<S>                                <C>              <C>                <C>              <C>            <C>
George B. Wilson                  450,000 (1)       1.2                450,000             0             -
1261 Farm Road
Berwyn, PA 19312

Roger K. Stager                   135,000 (2)        *                 135,000             0             -
683 Newbury Street
Livermore, CA 94550

Donald Trimmer                    135,000 (2)        *                 135,000             0             -
                                  -------            -                 -------             -             -
1687 Quail Court
Livermore, CA 94550

TOTAL                             720,000           1.9                720,000             0             -
                                  =======           ===                =======             =             =
<FN>

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


(1)  Includes  56,250  shares of common  stock that are  subject to an escrow in
     favor of Legato to satisfy any breaches of  representations  and warranties
     made by  Intelliguard  or certain of its  stockholders  in connection  with
     Legato's  acquisition  of  Intelliguard.  Such escrow will expire  April 1,
     2000.

(2)  Includes  16,875  shares of common  stock that are  subject to an escrow in
     favor of Legato to satisfy any breaches of  representations  and warranties
     made by  Intelliguard  or certain of its  stockholders  in connection  with
     Legato's  acquisition  of  Intelliguard.  Such escrow will expire  April 1,
     2000.
</FN>
</TABLE>



<PAGE>


                              PLAN OF DISTRIBUTION

         The shares  offered hereby may be sold by the selling  stockholders  at
various times in one or more of the following transactions:

     -    In the over-the-counter market;

     -    On The Nasdaq National Market;

     -    In privately negotiated transactions; or

     -    In a combination of any of the above transactions.

         The  selling  stockholders  may sell  their  shares  at  market  prices
prevailing at the time of the sale, at prices related to such prevailing  market
prices, at negotiated prices or at fixed prices.


         The selling  stockholders may use  broker-dealers to sell their shares.
If this happens,  broker-dealers  will either  receive  discounts or commissions
from the selling stockholders,  or they will receive commissions from purchasers
of shares for whom they acted as agents.

         For the purposes of this  Prospectus,  the term "selling  stockholders"
shall include donees,  pledgees and other assignees selling shares received from
a selling  stockholder  named  herein as well as any donees,  pledgees and other
assignees selling shares received from such donees, pledgees or assignees.


                                  LEGAL MATTERS


         The legality of the  securities  offered hereby will be passed upon for
Legato by Gunderson Dettmer Stough Villeneuve  Franklin & Hachigian,  LLP, Menlo
Park, California.

                                     EXPERTS


         The consolidated  balance sheets of Legato as of December 31, 1998, and
1997  and the  consolidated  statements  of  income  and  comprehensive  income,
stockholders'  equity,  and cash  flows for each of the years in the three  year
period ended  December 31, 1998  incorporated  by reference in this  prospectus,
have   been    incorporated    herein   in    reliance    on   the   report   of
PricewaterhouseCoopers  LLP, independent accountants,  given on the authority of
that firm as experts in accounting and auditing.

     The consolidated financial statements of Qualix Group, Inc., as of June 30,
1998 and June 30, 1997 and for each of the three years in the period  ended June
30, 1998 are  incorporated  by reference in this prospectus from Legato Systems,
Inc.'s  registration  statement  No.  333-74433 on Form S-4.  Such  consolidated
financial  statements  have been  audited by Deloitte & Touche LLP,  independent
auditors,  as stated in their report, which is incorporated herein by reference,
and have been so  incorporated  in  reliance  upon the report of such firm given
upon their authority as experts in accounting and auditing.

                       WHERE YOU CAN FIND MORE INFORMATION

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

         The SEC allows us to "incorporate by reference" the information we file
with them,  which means that we can  disclose  important  information  to you by
referring you to those documents.  The information  incorporated by reference is
considered to be part of this  prospectus,  and  information  that we file later
with the SEC will  automatically  update  and  supersede  this  information.  We
incorporate  by reference the documents  listed below and any future  filings we
will make with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934:

         1.       Annual  Report on Form 10-K for the year  ended  December  31,
                  1998,  filed on  February  10,  1999,  as amended by  Legato's
                  amendment  to the Annual  Report on Form 10-K/A for the fiscal
                  year ended December 31, 1998, filed on March 4, 1999;

         2.       The information from the section entitled "Unaudited Pro Forma
                  Combined   Condensed   Consolidated   Financial   Statements",
                  appearing on pages  71-75,  and the section  entitled  "Qualix
                  Group, Inc. Consolidated Financial  Statements",  appearing on
                  pages F-1 - F-23, of Legato's  registration  statement on Form
                  S-4 filed on March 16, 1999 (File No.
                  333-74433);

         3.       The  description of Legato capital stock contained in Legato's
                  registration  statement  on Form  8-A,  dated  May  24,  1995,
                  including any amendment or report  updating such  description;
                  and

         4.       The  description of Legato capital stock contained in Legato's
                  registration  statement  on Form  8-A,  dated  May  23,  1997,
                  including any amendment or report updating such description

         You may request a copy of these  filings,  at no cost, by calling us at
(650) 812-6000 or by writing to us at the following address:

                              Legato Systems, Inc.
                                3210 Porter Drive
                               Palo Alto, CA 94304
                            Attn: Investor Relations






<PAGE>

This  prospectus is part of a registration  statement we filed with the SEC. You
should  rely  only  on the  information  or  representations  provided  in  this
prospectus. We have authorized no one to provide you with different information.
We are 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 is
accurate as of any date other than the date on the front of the document.






                                 720,000 Shares







                              LEGATO SYSTEMS, INC.






                                  Common Stock




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


                                 April __, 1999

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



<PAGE>




                                     PART II


                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 14.  Other Expenses of Issuance and Distribution.

         The  following   table  sets  forth  all   expenses,   other  than  the
underwriting discounts and commissions,  payable by the Registrant in connection
with the sale of the common stock being  registered.  All the amounts  shown are
estimates except for the registration fee.

<TABLE>
<S>                                                                                                    <C>

        Securities and Exchange Commission Registration Fee..................................          $10,000
        Legal Fees and Expenses..............................................................           10,000
        Accounting Fees and Expenses.........................................................            5,000
        Transfer Agent and Registrar Fees....................................................           14,500
        Miscellaneous........................................................................            4,500
                                                                                                     ---------
             Total...........................................................................          $44,000
                                                                                                       =======
</TABLE>

Item 15.  Indemnification of Officers and Directors.

         Section 145 of the Delaware General Corporation law ("DGCL") empowers a
Delaware  corporation  to indemnify any persons who are, or are threatened to be
made,  parties to any  threatened,  pending or completed  legal action,  suit or
proceedings,  whether civil,  criminal,  administrative or investigative  (other
than action by or in the right of such corporation),  by reason of the fact that
such person was an officer or director of such corporation, or is or was serving
at the request of such corporation as a director,  officer, employee or agent of
another corporation or enterprise. The indemnity may include expenses (including
attorneys' fees),  judgments,  fines and amounts paid in settlement actually and
reasonably  incurred  by such person in  connection  with such  action,  suit or
proceeding,  provided that such officer or director acted in good faith and in a
manner he reasonably  believed to be in or not opposed to the corporation's best
interests, and, for criminal proceedings, had no reasonable cause to believe his
conduct was illegal. A Delaware corporation may indemnify officers and directors
in an action by or in the right of the  corporation  under the same  conditions,
except that no  indemnification  is permitted  without judicial  approval if the
officer  or  director  is  adjudged  to be  liable  to  the  corporation  in the
performance  of his duty.  Where an officer or  director  is  successful  on the
merits or  otherwise  in the  defense  of any  action  referred  to  above,  the
corporation  must  indemnify  him against  the  expenses  which such  officer or
director actually and reasonably incurred.

         In accordance  with the DGCL,  Legato's  Certificate  of  Incorporation
("Certificate")  contains a provision  to limit the  personal  liability  of the
directors of Legato for violations of their  fiduciary duty as a director.  This
provision eliminates each director's liability to Legato or its stockholders for
monetary  damages except (i) for any breach of the director's duty of loyalty to
the Legato or its stockholders,  (ii) for acts or omissions not in good faith or
which involve intentional  misconduct or a knowing violation of law, (iii) under
Section 174 of the DGCL  providing  for  liability  of  directors  for  unlawful
payment of dividends or unlawful stock purchases or redemptions, or (iv) for any
transaction  from which a director  derived an improper  personal  benefit.  The
effect of this provision is to eliminate the personal liability of directors for
monetary damages for actions involving a breach of their fiduciary duty of care,
including any such actions involving gross negligence.

         Article  XI of  Legato's  Certificate  and  Article  VII,  Section 6 of
Legato's  Bylaws  provide for  indemnification  of the officers and directors of
Legato to the fullest extent permitted by applicable law.

         Legato has entered into  indemnification  agreements with each director
and  executive  officer  which  provide  indemnification  to such  directors and
executive  officers under certain  circumstances for acts or omissions which may
not be covered by directors' and officers' liability insurance.

Item 16.  Exhibits.

         The  exhibits  listed  in the  Exhibit  Index  as filed as part of this
Registration Statement.

         (a)  Exhibits

<TABLE>

Exhibit
Number        Description
<S>           <C>
2.1           Stock  Purchase  Agreement,  dated January 27, 1999, by and among Legato  Systems,  Inc.,  Intelliguard
              Software, Inc. and the Selling Stockholders.
3.1 (1)       Amended and Restated Certificate of Incorporation of the Registrant, as amended to date
3.2 (2)       Amended and Restated Bylaws of the Registrant adopted on May 23, 1997
3.3 (3)       Form of Certificate of Designation filed in connection with Rights Agreement, dated May 23, 1997
4.1           Reference is made to Exhibits 3.1, 3.2 and 3.3
4.2 (4)       Specimen Common Stock Certificate
4.6 (4)       Restated  Investor Rights  Agreement,  dated September 8, 1993,  among the Registrant and the investors
              and the founders  named therein,  as amended  January 28, 1994 and
              February  13,  1995 4.7 (3) Rights  Agreement,  dated May 23,  1997  between the
              Company and Harris Trust and Savings Bank, including
              the  Certificate of  Designation of Series A Junior  Participating
              Preferred Stock,  Form of Right  Certificate and Summary of Rights
              to Purchase  Preferred Shares attached thereto as Exhibit A, B and
              C, respectively.
5.1           Opinion of Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP.
23.1          Consent of PricewaterhouseCoopers LLP.
23.2          Consent of Gunderson  Dettmer  Stough  Villeneuve  Franklin &  Hachigian,  LLP (included in the opinion
              filed as Exhibit 5.1).
23.3          Consent of Deloitte & Touche LLP.
24.1          Power of Attorney (reference is made to the signature page of this Registrant Statement).
- -------------------

<FN>
(1)   Incorporated by reference to the  registrant's  definitive Proxy Statement
      for Special  Meeting of  Stockholders,  dated May 31, 1996 and  definitive
      Proxy Statement for Annual Meeting of Stockholders, dated April 6, 1998.

(2)   Incorporated by reference to the  registrant's  Current Report on Form8-K,
      dated June 6, 1997.

(3)   Incorporated by reference to the registrant's Form 8-A,dated May 30, 1997.

(4)   Incorporated by reference to the registrant's Registration Statement on
      Form S-1, filed May 9, 1995 (File No. 33-92072).
</FN>
</TABLE>



Item 17.  Undertakings.

         The undersigned Registrant hereby undertakes:

         (1) To file, during any period in which offers or sales are being made,
a post-effective  amendment to this Registration  Statement:  (i) to include any
prospectus  required by section  10(a)(3) of the Securities Act; (ii) to reflect
in the  prospectus  any facts or events  arising after the effective date of the
Registration  Statement (or the most recent  post-effective  amendment  thereof)
which,  individually or in the aggregate,  represent a fundamental change in the
information set forth in the  Registration  Statement;  and (iii) to include any
material  information  with respect to the plan of  distribution  not previously
disclosed  in  the  Registration  Statement  or  any  material  change  to  such
information in the Registration Statement.

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

         (3) To remove from registration by means of a post-effective  amendment
any of the securities being registered which remain unsold at the termination of
the offering.

         Insofar as indemnification for liabilities arising under the Securities
Act may be  permitted to  directors,  officers  and  controlling  persons of the
Registrant  pursuant to the provisions  described in Item 15, or otherwise,  the
Registrant  has been advised that in the opinion of the  Securities and Exchange
Commission  such  indemnification  is against  public policy as expressed in the
Securities Act and is, therefore,  unenforceable.  In the event that a claim for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
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.

         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
1934 Act (and,  where  applicable,  each  filing of an employee  benefit  plan's
annual report pursuant to Section 15(d) of the 1934 Act) that is incorporated by
reference in the Registration Statement shall be deemed to be a new registration
statement relating to the securities  offered therein,  and the offering of such
securities  at that time shall be deemed to be the  initial  bona fide  offering
thereof.

         For purposes of determining any liability under the Securities Act, the
information  omitted  from  the  form  of  prospectus  filed  as  part  of  this
Registration  Statement  in reliance  upon Rule 430A and  contained in a form of
prospectus  filed by the Registrant  pursuant to Rule 424(b)(1) or (4) or 497(h)
under  the  Securities  Act  shall  be  deemed  to be part of this  Registration
Statement as of the time it was declared effective.



<PAGE>




                                   SIGNATURES


         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of Palo Alto,  State of California,  on this 2nd day of
April, 1999.

                                             Legato systems, inc.


                                         By:   /s/   Louis C. Cole              
                                              Chairman of the Board,President 
                                              and Chief Executive Officer


                                POWER OF ATTORNEY

         KNOW ALL PERSONS BY THESE  PRESENTS,  that each person whose  signature
appears below constitutes and appoints jointly and severally,  Louis C. Cole and
Stephen C. Wise, and each of them, the lawful  attorneys and agents,  with power
and  authority  to do any and all acts and  things  and to  execute  any and all
instruments  which said  attorneys  and agents  determine  may be  necessary  or
advisable or required to enable Legato Systems, Inc., a Delaware corporation, to
comply with the Securities  Act, and any rules or regulations or requirements of
the  Securities  and Exchange  Commission in connection  with this  Registration
Statement. Without limiting the generality of the foregoing power and authority,
the powers  granted  include  the power and  authority  to sign the names of the
undersigned  officers and directors in the  capacities  indicated  below to this
Registration  Statement,  to any  and all  amendments,  both  pre-effective  and
post-effective,  and supplements to this Registration Statement,  and to any and
all  instruments  or  documents  filed as part of or in  conjunction  with  this
Registration  Statement or amendments or  supplements  thereof,  and each of the
undersigned  hereby  ratifies and confirms all that said attorneys and agents or
any of them  shall  do or  cause  to be done by  virtue  hereof.  This  Power of
Attorney may be signed in several counterparts.


         IN WITNESS WHEREOF,  each of the undersigned has executed this Power of
Attorney as of the date indicated.


         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.

<TABLE>

                Signature                                        Title                                 Date
                ---------                                        -----                                 ----
<S>                                           <C>                                                  <C>
/s/  Louis C. Cole                            Chairman of the Board, President and Chief           April 2, 1999
- ----------------------------------------
Louis C. Cole                                 Executive Officer (Principal Executive
                                              Officer)
/s/  Stephen C. Wise                          Senior Vice President, Finance and                   April 2, 1999
- ----------------------------------------
Stephen C. Wise                               Administration and Chief Financial Officer
                                              (Principal Financial and Accounting Officer)

/s/  Eric A. Benhamou                         Director                                             April 2, 1999
- ----------------------------------------
Eric A. Benhamou

/s/  H. Raymond Bingham                       Director                                             April 2, 1999
- ----------------------------------------
H. Raymond Bingham

/s/  Kevin A. Fong                            Director                                             April 2, 1999
- ----------------------------------------
Kevin A. Fong

/s/  David N. Strohm                          Director                                             April 2, 1999
- ----------------------------------------
David N. Strohm

/s/  Phillip E. White                         Director                                             April 2, 1999
- ----------------------------------------
Phillip E. White
</TABLE>




<PAGE>


                                  Exhibit Index


<TABLE>

Exhibit
Number        Description
<S>           <C>
2.1           Stock  Purchase  Agreement,  dated January 27, 1999, by and among Legato  Systems,  Inc.,  Intelliguard
              Software, Inc. and the Selling Stockholders.
3.1 (1)       Amended and Restated Certificate of Incorporation of the Registrant, as amended to date
3.2 (2)       Amended and Restated Bylaws of the Registrant adopted on May 23, 1997
3.3 (3)       Form of Certificate of Designation filed in connection with Rights Agreement, dated May 23, 1997
4.1           Reference is made to Exhibits 3.1, 3.2 and 3.3
4.2 (4)       Specimen Common Stock Certificate
4.6 (4)       Restated  Investor Rights  Agreement,  dated September 8, 1993,  among the Registrant and the investors
              and the founders  named therein,  as amended  January 28, 1994 and
              February  13,  1995 4.7 (3) Rights  Agreement,  dated May 23,  1997  between the
              Company and Harris Trust and Savings Bank, including
              the  Certificate of  Designation of Series A Junior  Participating
              Preferred Stock,  Form of Right  Certificate and Summary of Rights
              to Purchase  Preferred Shares attached thereto as Exhibit A, B and
              C, respectively.
5.1           Opinion of Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, LLP.
23.1          Consent of PricewaterhouseCoopers LLP.
23.2          Consent of Gunderson  Dettmer  Stough  Villeneuve  Franklin &  Hachigian,  LLP (included in the opinion
              filed as Exhibit 5.1).
23.3          Consent of Deloitte & Touche LLP.
24.1          Power of Attorney (reference is made to the signature page of this Registrant Statement).
- -------------------

<FN>
(1)   Incorporated by reference to the  registrant's  definitive Proxy Statement
      for Special  Meeting of  Stockholders,  dated May 31, 1996 and  definitive
      Proxy Statement for Annual Meeting of Stockholders, dated April 6, 1998.

(2)   Incorporated by reference to the  registrant's  Current Report on Form8-K,
      dated June 6, 1997.

(3)   Incorporated by reference to the registrant's Form 8-A,dated May 30, 1997.

(4)   Incorporated by reference to the registrant's Registration Statement on
      Form S-1, filed May 9, 1995 (File No. 33-92072).
</FN>
</TABLE>


<PAGE>
                                                                     EXHIBIT 2.1


                            STOCK PURCHASE AGREEMENT

                                  BY AND AMONG

                              LEGATO SYSTEMS, INC.,

                          INTELLIGUARD SOFTWARE, INC.,

                               DRG HOLDINGS, INC.,

                                  O.R.P., INC.,

                                  ROGER STAGER,

                                 DONALD TRIMMER,

                                       AND

                                  GEORGE WILSON



                                January 27, 1999


<TABLE>
<CAPTION>
                                TABLE OF CONTENTS



                                                                                                               Page

<S>                                                                                                              <C>
ARTICLE I  THE ACQUISITION........................................................................................1
         1.1  The Acquisition.....................................................................................1
         1.2  Purchase Price......................................................................................1
         1.3  Closing.............................................................................................2

ARTICLE II  REPRESENTATIONS AND WARRANTIES REGARDING TARGET AND ITS SUBSIDIARIES..................................2
         2.1  Organization, Standing and Power....................................................................3
         2.2  Capital Structure...................................................................................3
         2.3  Target Stock Plan...................................................................................4
         2.4  Authority...........................................................................................4
         2.5  Financial Statements................................................................................5
         2.6  Absence of Certain Changes..........................................................................5
         2.7  Absence of Undisclosed Liabilities..................................................................5
         2.8  Accounts Receivable.................................................................................6
         2.9  Litigation..........................................................................................6
         2.10  Restrictions on Business Activities................................................................6
         2.11  Governmental Authorization.........................................................................6
         2.12  Title to Property..................................................................................7
         2.13  Intellectual Property..............................................................................7
         2.14  Environmental Matters..............................................................................8
         2.15  Taxes.............................................................................................10
         2.16  Employee Benefit Plans............................................................................12
         2.17  Employees and Consultants.........................................................................14
         2.18  Related-Party Transactions........................................................................16
         2.19  Insurance.........................................................................................16
         2.20  Compliance with Laws..............................................................................16
         2.21  Brokers'and Finders'Fees..........................................................................16
         2.22  No Vote Required..................................................................................16
         2.23  Inventory.........................................................................................16
         2.24  Trade Relations...................................................................................16
         2.25  Customers and Suppliers...........................................................................17
         2.26  Material Contracts................................................................................17
         2.27  No Breach of Material Contracts...................................................................18
         2.28  Third-Party Consents..............................................................................19
         2.29  Year 2000 Compliance..............................................................................19
         2.30  Minute Books......................................................................................19
         2.31  Complete Copies of Materials......................................................................19
         2.32  Representations Complete..........................................................................19

ARTICLE III  ADDITIONAL REPRESENTATIONS AND WARRANTIES OF THE TARGET STOCKHOLDERS................................19
         3.1  Title to Target Common Stock.......................................................................20
         3.2  Purchase for Own Account...........................................................................20
         3.3  Authority..........................................................................................20
         3.4  Brokers'and Finders'Fees...........................................................................21
         3.5 Accredited Investor.................................................................................21
         3.6  Restricted Securities..............................................................................22
         3.7 Further Limitations on Disposition..................................................................22
         3.8  Legends............................................................................................22
         3.9  Agreement to Retain Shares.........................................................................22
         3.10  Agreement to Vote Shares and Grant Proxy..........................................................23

ARTICLE IV  REPRESENTATIONS AND WARRANTIES OF ACQUIROR...........................................................23
         4.1  Organization, Standing and Power...................................................................24
         4.2  Capital Structure..................................................................................24
         4.3  Authority..........................................................................................25
         4.4  Valid Issuance.....................................................................................26
         4.5  SEC Documents; Financial Statements................................................................26
         4.6  Absence of Certain Changes.........................................................................26
         4.7  Litigation.........................................................................................26
         4.8  Compliance with Laws...............................................................................27
         4.9  Representations Complete...........................................................................27

ARTICLE V  CONDUCT PRIOR TO THE CLOSING DATE.....................................................................27
         5.1  Conduct of Business of Target......................................................................27
         5.2  Notices............................................................................................30

ARTICLE VI  ADDITIONAL AGREEMENTS................................................................................30
         6.1  No Solicitation....................................................................................30
         6.2  Access to Information..............................................................................31
         6.3  Confidentiality....................................................................................31
         6.4  Public Disclosure..................................................................................31
         6.5  Consents; Cooperation..............................................................................31
         6.6  Update Disclosure; Breaches........................................................................32
         6.7  Legal Requirements.................................................................................32
         6.8  Blue Sky Laws......................................................................................33
         6.9  Certain Stock Rights...............................................................................33
         6.10  Escrow Agreement..................................................................................33
         6.11  Additional Agreements, Reasonable Efforts.........................................................33
         6.12  Employee Benefits.................................................................................33
         6.13  Registration Requirements.........................................................................33
         6.14  Tax Characterization..............................................................................38
         6.15  Intracompany Account..............................................................................39
         6.16  Acquiror Option Grants............................................................................40
         6.17  Transfer of Assets................................................................................41
         6.18  Name Change.......................................................................................41

ARTICLE VII  CONDITIONS TO THE ACQUISITION.......................................................................41
         7.1  Conditions to Obligations of Each Party to Effect the Acquisition..................................41
         7.2  Additional Conditions to Obligations of Target and Target Stockholders.............................42
         7.3  Additional Conditions to the Obligations of Acquiror...............................................42

ARTICLE VIII  TERMINATION, EXPENSES, AMENDMENT AND WAIVER........................................................44
         8.1  Termination........................................................................................44
         8.2  Effect of Termination..............................................................................44
         8.3  Expenses and Termination Fees......................................................................44
         8.4  Extension; Waiver..................................................................................45

ARTICLE IX  ESCROW AND INDEMNIFICATION...........................................................................45
         9.1  Survival of Representations, Warranties and Covenants..............................................45
         9.2  Indemnity..........................................................................................46
         9.3  Escrow Fund........................................................................................46
         9.4  Damage Threshold...................................................................................46
         9.5  Escrow Period......................................................................................47
         9.6  Claims.............................................................................................47
         9.7  Objections to Claims...............................................................................48
         9.8  Resolution of Conflicts; Arbitration...............................................................48
         9.9  Target Stockholders'Agent..........................................................................50
         9.10  Distribution Upon Termination of Escrow Period....................................................50
         9.11  Actions of the Target Stockholders'Agent..........................................................51
         9.12  Third-Party Claims................................................................................51
         9.13  Additional Indemnification........................................................................51

ARTICLE X  GENERAL PROVISIONS....................................................................................52
         10.1  Notices...........................................................................................52
         10.2  Interpretation....................................................................................53
         10.3  Counterparts......................................................................................54
         10.4  Entire Agreement; No Third Party Beneficiaries....................................................54
         10.5  Severability......................................................................................54
         10.6  Remedies Cumulative...............................................................................54
         10.7  Governing Law.....................................................................................54
         10.8  Assignment........................................................................................54
         10.9  Rules of Construction.............................................................................55
         10.10  California Commissioner of Corporations..........................................................55
</TABLE>



<PAGE>



SCHEDULES

Target Disclosure Letter
Acquiror Disclosure Letter

Schedule 1.2 (Allocation Of Purchase Price)
Schedule 2.3 (Phantom Stock Plan Interests)
Schedule 2.5 (Financial Statements)
Schedule 2.6 (Capital  Budget)  Schedule 2.12 (Equipment  Loaned)  Schedule 2.13
(Intellectual  Property)  Schedule 2.16  (Employee  Benefits Plan) Schedule 2.17
(Employees and  Consultants)  Schedule 2.19 (Insurance  Policies)  Schedule 2.26
(Material  Contracts)  Schedule  2.28 (Third  Party  Consents)  Schedule  7.3(g)
(Employment Agreement)

EXHIBITS

Exhibit A.........-        Escrow Agreement
Exhibit B.........-        Technology Assignment Agreement
Exhibit C.........-        Employment and Noncompetition Agreements





                            STOCK PURCHASE AGREEMENT



                  This STOCK PURCHASE  AGREEMENT (the  "Agreement")  is made and
entered  into as of January 27, 1999 by and among (i) Legato  Systems,  Inc.,  a
Delaware corporation ("Legato" or "Acquiror"), (ii) Intelliguard Software, Inc.,
a Delaware corporation  ("ISI"),  and O.R.P.,  Inc., a Pennsylvania  corporation
("ORP," with ISI and ORP being referred to  collectively  as the  "Companies" or
"Target"  and  individually  as a  Company),  and (iii) DRG  Holdings,  Inc.,  a
Pennsylvania  corporation  ("DRG  Holdings"),  Roger Stager,  Donald Trimmer and
George  Wilson  (each,  a "Target  Stockholder"  and  collectively,  the "Target
Stockholders").

                                    RECITALS

A. DRG Holdings owns all of the issued and outstanding  capital stock of ISI and
Roger  Stager,  Donald  Trimmer  and  George  Wilson  own all of the  issued and
outstanding capital stock of ORP and DRG Holdings.

B.  Acquiror  desires to purchase from the Target  Stockholders,  and the Target
Stockholders  desire to sell to  Acquiror,  all of the  issued  and  outstanding
capital  stock of ISI (the "ISI  Shares") and all of the issued and  outstanding
capital  stock of ORP (the "ORP Shares")  (collectively,  the ISI Shares and the
ORP Shares  shall be referred to herein as the "Target  Shares") in exchange for
newly issued shares of Acquiror's Common Stock (the  "Acquisition")  and/or cash
as set forth below.

                  NOW,   THEREFORE,   in  consideration  of  the  covenants  and
representations set forth herein, and for other good and valuable consideration,
the parties agree as follows:


                                    ARTICLE I

                                 THE ACQUISITION

1.1 The Acquisition.  Subject to the terms and conditions of this Agreement,  at
the Closing (as defined in Section 1.3) Acquiror agrees to purchase from each of
the Target  Stockholders,  and each of the Target  Stockholders hereby agrees to
convey, sell, transfer and deliver to Acquiror, all of his or its Target Shares,
in exchange for the Purchase Price (as defined in Section 1.2).

1.2  Purchase  Price.  Subject to the  provisions  of an escrow as  provided  in
Article  IX  hereof,  Acquiror  agrees  to  issue  and  deliver  to  the  Target
Stockholders at the Closing (i) an aggregate of Ten Thousand  (10,000) shares of
Acquiror's  Common Stock (as  appropriately  adjusted  for Legato stock  splits,
dividends, combinations, reclassifications and the like) for the purchase of the
ORP Shares and (ii) an (A)  aggregate of Seven  Hundred Ten  Thousand  (710,000)
shares of Acquiror's  Common Stock (as  appropriately  adjusted for Legato stock
splits,  dividends,  combinations,  reclassifications  and the  like) and (B) an
amount of cash (in U.S. Dollars) equal to One Hundred Eighty Thousand  (180,000)
multiplied by the Stock Price (as defined below) (the "Cash  Consideration") for
the purchase of the ISI Shares.  The Seven  Hundred  Twenty  Thousand  (720,000)
shares of Acquiror's  Common Stock (as  appropriately  adjusted for Legato stock
splits, dividends,  combinations and the like) issued to purchase the ORP Shares
and ISI  Shares  (collectively,  the  "Acquiror  Common  Stock")  and  the  Cash
Consideration  shall be referred to herein as the "Purchase  Price" and shall be
allocated among the Target Stockholders as set forth on Schedule 1.2 hereof. The
term "Stock Price" shall mean the closing sale price of Acquiror's  Common Stock
on the second to last trading day immediately preceding the Closing Date or such
other date as the parties  hereto may agree in writing  before the Closing (with
such date on which the stock price is actually measured, the "Pricing Date"), as
reported in the Nasdaq National Market.

1.3      Closing.

(a) The closing of the Acquisition  (the "Closing")  shall take place as soon as
practicable after the satisfaction or waiver of each of the conditions set forth
in Article  VII hereof or at such other time as the  parties  hereto  agree (the
date on which the Closing shall occur,  the "Closing  Date").  The Closing shall
take place at the offices of  Gunderson  Dettmer  Stough  Villeneuve  Franklin &
Hachigian, LLP or at such other location as the parties hereto agree.

(b) At the Closing,  (i) the Target  Stockholders  shall deliver to Acquiror the
stock  certificate(s)  representing  all of the Target Shares,  duly endorsed in
favor of Acquiror or accompanied by stock power(s) duly executed in favor of and
in a form  reasonably  acceptable to Acquiror;  (ii) Acquiror  shall cause to be
paid to the Target Stockholders the Cash Consideration, payable by wire transfer
(out of which cash DRG Holdings  will make the payments  provided for in Section
6.9 hereof);  (iii) Acquiror shall issue and deliver to the Target  Stockholders
the Acquiror Common Stock to be allocated  among the Target  Stockholders as set
forth on Schedule 1.2 hereof;  (iv) the Target and the Target Stockholders shall
deliver to Acquiror the certificates,  instruments and documents  referred to in
Section  7.3 hereof;  and (v)  Acquiror  shall  deliver to Target and the Target
Stockholders the certificates,  instruments and documents referred to in Section
7.2 hereof.


                                   ARTICLE II

      REPRESENTATIONS AND WARRANTIES REGARDING TARGET AND ITS SUBSIDIARIES

                  Target and Target Stockholders jointly and severally represent
and warrant to Acquiror  that the  statements  contained  in this Article II are
true and  correct,  except as set forth in the  disclosure  letter  delivered by
Target and Target  Stockholders  to Acquiror prior to the execution and delivery
of this Agreement (the "Target Disclosure Letter"). The Target Disclosure Letter
shall be arranged in  paragraphs  corresponding  to the  numbered  and  lettered
paragraphs  contained in this Article II, and the  disclosure  in any  paragraph
shall qualify only the  corresponding  paragraph in this Article II.  Nothing in
the Target  Disclosure  Letter shall be deemed adequate to disclose an exception
to a  representation  or  warranty  made  herein,  however,  unless  the  Target
Disclosure  Letter  identifies the exception with reasonable  particularity  and
describes  the  relevant  facts  in  reasonable  detail.  Without  limiting  the
generality  of the  foregoing,  the mere  listing (or  inclusion of a copy) of a
document or other item shall not be deemed  adequate to disclose an exception to
a representation or warranty made herein (unless the  representation or warranty
has to do with  the  existence  of the  document  or  other  item  itself).  Any
reference in this Article II to an agreement being "enforceable" shall be deemed
to be  qualified  to the extent  such  enforceability  is subject to (i) laws of
general  application  relating to  bankruptcy,  insolvency,  moratorium  and the
relief of debtors, and (ii) the availability of specific performance, injunctive
relief and other equitable  remedies.  For purposes of this Agreement,  "Target"
will be deemed to  include  (and each  representation  and  warranty  will apply
separately  and  collectively  to)  ISI and ORP  and  each of  their  respective
subsidiaries,  unless  the  context  otherwise  requires.  Any  reference  to  a
"Material  Adverse Effect" with respect to any entity or group of entities means
any  event,  change  or  effect  that is  materially  adverse  to the  condition
(financial or otherwise),  properties,  assets  (including  intangible  assets),
liabilities,  business,  operations  or results of operations of such entity and
its subsidiaries, taken as a whole.

2.1  Organization,  Standing and Power.  Target is a corporation duly organized,
validly  existing and in good  standing  under the laws of its  jurisdiction  of
organization.  Target has the corporate power to own its properties and to carry
on its business as now being  conducted  and as proposed to be conducted  and is
duly  qualified to do business and is in good standing in each  jurisdiction  in
which the failure to be so qualified and in good standing  would have a Material
Adverse  Effect on Target.  Target has  delivered to Acquiror a true and correct
copy of the Articles of Incorporation and Bylaws or other charter documents,  as
applicable,  of Target,  each as amended to date.  Target is not in violation of
any of the provisions of its Articles of  Incorporation  or Bylaws or equivalent
organizational  documents.  Target  is the  owner of all  outstanding  shares of
capital  stock  of each  of its  subsidiaries  and  all  such  shares  are  duly
authorized, validly issued, fully paid and nonassessable. All of the outstanding
shares of capital  stock of each such  subsidiary  are owned by Target  free and
clear of any liens,  charges,  claims or encumbrances or rights of others. There
are no  outstanding  subscriptions,  options,  warrants,  puts,  calls,  rights,
exchangeable or convertible securities or other commitments or agreements of any
character  relating to the issued or unissued  capital stock or other securities
of any such subsidiary, or otherwise obligating Target or any such subsidiary to
issue,  transfer,   sell,  purchase,   redeem  or  otherwise  acquire  any  such
securities.  Target does not  directly or  indirectly  own any equity or similar
interest in, or any interest convertible or exchangeable or exercisable for, any
equity or similar  interest in, any corporation,  partnership,  joint venture or
other business association or entity.

2.2  Capital  Structure.  The  authorized  capital  stock  of  ISI  consists  of
25,000,000  shares of Common  Stock,  10,000,000  of which there were issued and
outstanding as of the date of this  Agreement.  The authorized  capital stock of
ORP consists of  25,000,000  shares of Common  Stock,  10,000,000 of which there
were issued and  outstanding  as of the date of this  Agreement.  The issued and
outstanding  shares of ISI and ORP are owned by the  persons  and in the amounts
set  forth on  Section  2.2  hereof.  There are no other  outstanding  shares of
capital stock or voting  securities of Target and no outstanding  commitments to
issue any shares of capital  stock or voting  securities  after the date of this
Agreement.  All outstanding  shares of Target capital stock are duly authorized,
validly  issued,  fully  paid and  non-assessable  and are free of any  liens or
encumbrances other than any liens or encumbrances created by or imposed upon the
holders  thereof,  and are not  subject to  preemptive  rights,  rights of first
refusal,  rights of first  offer or  similar  rights  created  by  statute,  the
Articles of  Incorporation  or Bylaws of Target or any agreement to which Target
is a party or by which it is bound.  Except for the rights  created  pursuant to
this Agreement, there are no other options, warrants, calls, rights, commitments
or  agreements  of any  character  to which  Target is a party or by which it is
bound obligating Target to issue, deliver,  sell, repurchase or redeem, or cause
to be issued,  delivered,  sold,  repurchased or redeemed,  any shares of Target
capital stock or obligating Target to grant, extend,  accelerate the vesting of,
change the price of, or otherwise amend or enter into any such option,  warrant,
call,  right,  commitment or agreement.  There are no contracts,  commitments or
agreements relating to the voting,  purchase or sale of Target capital stock (i)
between  or among  Target  and any of its  stockholders  and (ii) to the best of
Target's  knowledge,  among  any of  Target's  stockholders  or  between  any of
Target's  stockholders  and any third  party.  True and  complete  copies of all
agreements and instruments relating to or issued under the Target Unit Plan have
been made available to Acquiror,  and except as contemplated in Section 2.3 such
agreements and instruments have not been amended, modified or supplemented,  and
there are no  agreements  to amend,  modify or  supplement  such  agreements  or
instruments from the form made available to Acquiror.  All outstanding shares of
Target capital stock were issued in compliance  with all applicable  federal and
state securities laws.

2.3 Target  Unit Plan.  Before the  Closing  Date,  Target  shall  amend the ISI
Incentive Stock Plan (the "Target Unit Plan") to permit the cash payments to the
persons and in the amounts set forth on Schedule 2.3 hereof and the cancellation
without  payment of the unvested  portion of any interests under the Target Unit
Plan. Upon payment of the cash obligation as provided in Section 6.9 hereof, all
obligations of Target  pursuant to the Target Unit Plan shall be satisfied,  and
Target shall obtain the releases contemplated by Section 7.3(h).

2.4      Authority.

(a)  Target has all requisite  corporate  power and authority to enter into this
     Agreement, the Escrow Agreement to be entered into among Acquiror,  Target,
     Target  Stockholders,  a  representative  of the Target  Stockholders  (the
     "Target  Stockholders'  Agent"),  and an escrow agent, in substantially the
     form  attached  hereto  as  Exhibit  A (the  "Escrow  Agreement"),  and the
     Technology Assignment Agreement to be entered into between DRG Holdings and
     ISI,  in  substantially   the  form  attached  hereto  as  Exhibit  B  (the
     "Technology   Assignment   Agreement")   (collectively,   the  "Transaction
     Documents")  to  which it is a party  and to  consummate  the  transactions
     contemplated hereby the thereby.  The execution and delivery this Agreement
     and  the  other   Transaction   Documents  and  the   consummation  of  the
     transactions  contemplated  hereby and thereby have been duly authorized by
     all necessary  corporate  action on the part of Target.  This Agreement and
     other Transaction Documents have been duly executed and delivered by Target
     and  constitute  the valid and binding  obligations  of Target  enforceable
     against Target in accordance with their terms.

(b)  The  execution  and delivery of this  Agreement  and the other  Transaction
     Documents  by  Target  do not,  and the  consummation  of the  transactions
     contemplated  hereby and thereby will not,  conflict with, or result in any
     violation of, or default under (with or without notice or lapse of time, or
     both), or give rise to a right of termination, cancellation or acceleration
     of any  obligation  or loss of any benefit  under (i) any  provision of the
     Articles of  Incorporation  or Bylaws of Target,  as  amended,  or (ii) any
     Material  Contract  (as  defined  in  Section  2.26),  permit,  concession,
     franchise,  license, judgment, order, decree, statute, law, ordinance, rule
     or regulation applicable to Target or any of its properties or assets.

(c)  No  consent,   approval,   order  or  authorization  of,  or  registration,
     declaration or filing with, any court,  administrative agency or commission
     or other governmental authority or instrumentality  ("Governmental Entity")
     is required by or with respect to Target in  connection  with the execution
     and delivery of this Agreement and the other  Transaction  Documents or the
     consummation of the transactions contemplated hereby or thereby, except for
     such   consents,   approvals,   orders,   authorizations,    registrations,
     declarations  and  filings  as  may  be  required  under  applicable  state
     securities  laws,  the  securities  laws  of any  foreign  country  and the
     Hart-Scott-Rodino  Antitrust Improvements Act of 1976, as amended (the "HSR
     Act").

2.5  Financial  Statements.  Target has delivered to Acquiror its unaudited
combined financial statements (balance sheet, statement of operations, statement
of Target  Stockholders'  equity and  statement of cash flows) (i) for ISI as of
and for the  fiscal  year  ended  December  31,  1998  and  (ii) for ORP and its
subsidiary  as of and for the two fiscal years ended  December 31, 1998 and 1997
attached  as  Schedule  2.5  (collectively,  the  "Financial  Statements").  The
Financial  Statements have been prepared in accordance  with generally  accepted
accounting principles ("GAAP") (except that the financial statements do not have
notes thereto) applied on a consistent  basis  throughout the periods  indicated
and with each other.  The  Financial  Statements  fairly  present the  financial
condition and operating  results of Target as of the dates, and for the periods,
indicated  therein,  subject to normal year-end audit  adjustments which are not
material in the aggregate.  Target maintains a system of accounting  established
and administered in accordance with GAAP.

2.6 Absence of Certain  Changes.  Since December 31, 1998,  (the "Target Balance
Sheet  Date"),  Target  has  conducted  its  business  in  the  ordinary  course
consistent with past practice and there has not occurred:  (i) any change, event
or  condition  (whether or not covered by  insurance)  that has  resulted in, or
might  reasonably be expected to result in, a Material Adverse Effect on Target;
(ii) any  acquisition,  sale or transfer of any material asset of Target;  (iii)
any  change  in  accounting  methods  or  practices  (including  any  change  in
depreciation or amortization  policies or rates) by Target or any revaluation by
Target of any of its assets; (iv) any declaration,  setting aside, or payment of
a dividend or other  distribution  with respect to the shares of Target,  or any
direct or indirect redemption, purchase or other acquisition by Target of any of
its shares of capital stock;  (v) any Material  Contract entered into by Target,
other than as provided to Acquiror, or any material amendment or termination of,
or default under,  any Material  Contract to which Target is a party or by which
it is bound;  (vi) any amendment or change to the Articles of  Incorporation  or
Bylaws of Target;  (vii) any increase in or modification of the  compensation or
benefits  payable  or to  become  payable  by  Target  to any of its  directors,
employees or consultants;  (viii) capital expenditures or capital commitments by
Target  exceeding  $25,000  individually  or  $200,000  in the  aggregate;  (ix)
destruction of, damage to or loss of any material  assets,  business or customer
of Target  (whether or not covered by insurance);  (x) labor trouble or claim of
wrongful  discharge  or other  unlawful  labor  practice or action;  or (xi) any
negotiation  or  agreement  by Target to do any of the things  described  in the
preceding clauses (i) through (x) (other than negotiations with Acquiror and its
representatives regarding the transactions contemplated by this Agreement).

2.7  Absence of  Undisclosed  Liabilities.  Target has no  material  liability,
indebtedness, obligation, expense, claim, deficiency, guaranty or endorsement of
any  type,  individually  or  in  the  aggregate,   whether  accrued,  absolute,
contingent, matured, unmatured or other (whether or not required to be set forth
in the Target Balance Sheet under GAAP) which  individually  or in the aggregate
(i) has not been reflected in the Target Balance Sheet or (ii) has not arisen in
the ordinary  course of business  since the Target Balance Sheet Date in amounts
consistent with prior periods.

2.8 Accounts  Receivable.  The accounts  receivable shown on the Target Balance
Sheet arose in the ordinary  course of business  and have been  collected or are
collectible  in the book  amounts  thereof,  less  the  allowance  for  doubtful
accounts and returns provided for in such balance sheet. Allowances for doubtful
accounts and returns are adequate and have been prepared in accordance  with the
past  practices of Target.  The accounts  receivable of Target arising after the
date of the Target  Balance  Sheet and prior to the date hereof  arose,  and the
accounts  receivable  arising  prior to the  Closing  Date  will  arise,  in the
ordinary  course of business and have been  collected or are  collectible in the
book  amounts  thereof,  less  allowances  for  doubtful  accounts  and  returns
determined in accordance with the past practices of Target. None of the accounts
receivable  are  subject  to any  material  claim of  offset or  recoupment,  or
counterclaim  and Target has no knowledge  of any  specific  facts that would be
reasonably likely to give rise to any such claim. No material amount of accounts
receivable are contingent upon the  performance by Target of any obligation.  No
agreement  for  deduction or discount has been made with respect to any accounts
receivable.

2.9 Litigation.  There is no private or governmental action, suit,  proceeding,
claim,  arbitration  or  investigation  pending  before  any  agency,  court  or
tribunal,  foreign or  domestic,  or, to the  knowledge  of  Target,  threatened
(including  allegations  that could form the basis for  future  action)  against
Target or any of its properties or officers or directors (in their capacities as
such), nor is there any reasonable basis therefor. There is no judgment,  decree
or order against Target, or, to the knowledge of Target, any of its directors or
officers  (in  their  capacities  as  such),  that  could  prevent,  enjoin,  or
materially  alter  or  delay  any  of  the  transactions  contemplated  by  this
Agreement,  or that could  reasonably  be  expected  to have a Material  Adverse
Effect  on  Target.  All  litigation  to which  Target  is a party  (or,  to the
knowledge  of Target,  threatened  to become a party) is disclosed in the Target
Disclosure  Letter.  Target does not have any plans to initiate any  litigation,
arbitration or other proceeding against any third party.

2.10  Restrictions  on Business  Activities.  There is no  agreement,  judgment,
injunction,  order or decree binding upon Target that has or could reasonably be
expected to have the effect of  prohibiting  or impairing  any current or future
business  practice  of Target,  any  acquisition  of  property  by Target or the
conduct of  business  by Target as  currently  conducted  or as  proposed  to be
conducted by Target.

2.11  Governmental  Authorization.  Target has  obtained  each  federal,  state,
county, local or foreign governmental consent,  license, permit, grant, or other
authorization  of a Governmental  Entity (i) pursuant to which Target  currently
operates or holds any interest in any of its properties or (ii) that is required
for the operation of Target's  business or the holding of any such interest ((i)
and (ii) herein  collectively called "Target  Authorizations"),  and all of such
Target  Authorizations are in full force and effect, except where the failure to
obtain or have any such Target  Authorizations  could not reasonably be expected
to have a Material Adverse Effect on Target.

2.12  Title to  Property.  Target  has good and  marketable  title to all of its
properties, interests in properties and assets, real and personal, necessary for
the conduct of its business as presently conducted or which are reflected in the
Target  Balance  Sheet or acquired  after the Target  Balance Sheet Date (except
properties,  interests in properties and assets sold or otherwise disposed of in
the ordinary  course of business since the Target  Balance Sheet Date),  or with
respect to leased properties and assets,  valid leasehold  interests therein, in
each  case  free  and  clear  of  all  mortgages,  liens,  pledges,  charges  or
encumbrances of any kind or character,  except (i) the lien of current taxes not
yet due and payable, (ii) such imperfections of title, liens and easements as do
not and  will  not  materially  detract  from or  interfere  with the use of the
properties subject thereto or affected thereby,  or otherwise  materially impair
business operations involving such properties and (iii) liens securing debt that
are reflected on the Target Balance Sheet. The plants, property and equipment of
Target that are used in the  operations  of its business  are in good  operating
condition and repair  (ordinary wear and tear excepted).  All properties used in
the operations of Target are reflected in the Target Balance Sheet to the extent
generally  accepted  accounting  principles  require  the same to be  reflected.
Schedule 2.12 identifies each parcel of real property owned by Target.

2.13     Intellectual Property.

(a)  "Proprietary Rights" shall mean all rights in and to inventions (whether or
     not  patentable),  ideas,  formulae,  software  (in source and object  code
     form),  process  engineering,  art works,  schematic  drawings,  processes,
     product plans, logos,  trademarks,  trademark applications,  service marks,
     moral rights, copyrights,  trade names, trade secrets, know-how,  technical
     information,  patents, patent applications,  databases,  employee lists and
     customer lists.

(b)  The  Proprietary  Rights  include  all  patent  rights,  copyrights,  trade
     secrets,  information, and other proprietary rights and processes necessary
     to  conduct  the  business  of Target as  conducted  or as  proposed  to be
     conducted. Target is the sole owner of all right, title and interest in and
     to all the  Proprietary  Rights free and clear of all liens,  encumbrances,
     claims, rights of use and restrictions  whatsoever.  Any of the Proprietary
     Rights  owned by Target  which  require  the  execution  and filing with an
     appropriate  governmental  agency,  including without limitation the Patent
     and Trademark Office, have been so indicated on Schedule 2.13. There are no
     outstanding  options,  licenses or  agreements  of any kind relating to the
     Proprietary Rights owned by Target (other than for distribution of standard
     object code  products in the ordinary  course of business)  nor is Target a
     party to any options,  licenses or  agreements  of any kind with respect to
     the logos,  trademark and tradename  rights,  software,  databases,  source
     code,  patents,  patent rights,  copyrights,  trade secrets,  processes and
     proprietary licenses, information,  proprietary rights and processes of any
     other person or entity which relates to the business of Target as conducted
     or as proposed to be conducted.

(c)  To the  knowledge of Target,  the patent and trademark  Proprietary  Rights
     owned  by  Target  do not  infringe  upon  or  conflict  with  any  patent,
     copyright,   trademark,   trade  secret  or  other  proprietary  rights  or
     intellectual  property  of any other  person,  firm,  corporation  or other
     entity. To the knowledge of Target,  the other Proprietary  Rights owned by
     Target  do not  infringe  upon or  conflict  with  any  patent,  copyright,
     trademark,  trade  secret  or  other  proprietary  rights  or  intellectual
     property of any other person,  firm,  corporation or other entity. There is
     not  pending  or,  to the  knowledge  of  Target,  threatened  any claim or
     litigation  contesting  the right of Target  to engage in its  business  or
     employ any of the Proprietary Rights.  Target has taken reasonable security
     measures  to  protect  the  secrecy,  confidentiality,  and  value  of  all
     Proprietary  Rights set forth on Schedule  2.13.  Target has only disclosed
     confidential  Proprietary Rights to third parties subject to valid, binding
     and  enforceable  non-disclosure  agreements  that protect  such  disclosed
     Proprietary  Rights at least as much as Target protects  Proprietary Rights
     its owns, and in no case permits less than  reasonable  protection.  Target
     has not disclosed any software source code to any third parties.

(d)  Any employee,  consultant  or other person who,  either alone or in concert
     with  others,  developed,  invented,  discovered,  derived,  programmed  or
     designed  any of the  Proprietary  Rights  owned  by  Target,  or any  part
     thereof,  or who has knowledge of or access to information  relating to it,
     has been put on notice that the  Proprietary  Rights  owned by Target,  are
     proprietary  to Target and not to be divulged or misused,  and has assigned
     or licensed all of his or her rights relating to the Proprietary  Rights to
     Target.  To the knowledge of Target,  no employee of Target is in violation
     of  any  material  term  of  any  employment   contract,   confidentiality,
     proprietary  information or inventions agreement,  or any other contract or
     agreement  relating to the relationship of any such employee with Target or
     any previous employer,  and all such contracts or agreements with employees
     are in full  force and effect and are valid,  binding  and  enforceable  in
     accordance with their  respective  provisions.  To the knowledge of Target,
     the  employees of Target are not  obligated  under any contract  (including
     licenses,  covenants,  or commitments of any nature) or other agreement, or
     subject  to any  judgment,  decree or order of any court or  administrative
     agency that would conflict with their  obligation to use their best efforts
     to promote the interests of Target or that would conflict with the business
     of Target as conducted or as proposed to be conducted.

(e)  There are no material contracts,  commitments,  leases,  permits, and other
     instruments  (written or oral)  binding  upon  Target  with  respect to the
     Proprietary Rights except the contracts listed in Schedule 2.13. Seller has
     delivered to Acquiror  true and  complete  copies of all such items and any
     amendments thereto. All of such contracts, commitments, leases, permits and
     instruments  are in full  force  and  effect  and are  valid,  binding  and
     enforceable in accordance with their respective  provisions,  and Target is
     not in material default nor has there occurred an event or condition which,
     with the passage of time or giving of notice (or both),  would constitute a
     default  with  respect to the  payment  or  performance  of any  obligation
     thereunder  that could  reasonably  be expected to have a Material  Adverse
     Effect on Target; and no claim of such a material default has been asserted
     and, to the  knowledge of Target,  there is no basis or alleged  basis upon
     which such a claim  could be made.  Target has not  received  any notice or
     notices  claiming any such  material  default or  indicating  the desire or
     intention of any other party thereto to amend, modify, rescind or terminate
     the same.

2.14     Environmental Matters.

(a)  (i) Target has  obtained  all required  Environmental  Approvals,  all such
     Environmental  Approvals are current, valid and in good standing, and there
     are no  proceedings  commenced or, to Target's  knowledge,  threatened,  to
     revoke or amend any Environmental Approvals and there is no basis therefor;
     (ii) all operations of Target have been and are now in compliance  with all
     Environmental Laws; (iii) all environmental  information,  data and studies
     have been delivered or made available to Acquiror; (iv) there is no Release
     which is now present in, on or under any property owned or leased by Target
     currently  or at any  time in the  past  (including  underlying  soils  and
     substrata, surface water and groundwater) that could reasonably be expected
     to have a Material  Adverse  Effect on Target;  (v) there are no  Hazardous
     Materials  in,  on or under  the any  property  owned or  leased  by Target
     currently or at any time in the past that could  reasonably  be expected to
     have a Material  Adverse Effect on Target;  and (vi) there are no Hazardous
     Materials  originating  from any neighboring or adjoining  properties which
     has migrated onto, or is migrating  towards any property owned or leased by
     Target that could  reasonably be expected to have a Material Adverse Effect
     on Target.

(b) As used in this Section 2.14, the following terms have these meanings:

     (i)  "Environmental   Laws"   means   all   applicable   statutes,   rules,
          regulations,   ordinances,   orders,  decrees,   judgments,   permits,
          licenses,  consents,  approvals,   authorizations,   and  governmental
          requirements or directives or other  obligations  lawfully  imposed by
          governmental authority under federal, state or local law pertaining to
          the  protection  of the  environment,  protection  of  public  health,
          protection of worker health and safety, the treatment, emission and/or
          discharge of gaseous,  particulate and/or effluent pollutants,  and/or
          the handling of Hazardous Materials, including without limitation, the
          Clean  Air  Act,  42  U.S.C.  ss.  7401,  et seq.,  the  Comprehensive
          Environmental  Response,   Compensation  and  Liability  Act  of  1980
          ("CERCLA"),  42 U.S.C.  ss. 9601, et seq., the Federal Water Pollution
          Control Act, 33 U.S.C.  ss. 1321,  et seq.,  the  Hazardous  Materials
          Transportation  Act,  49  U.S.C.  ss.  1801,  et  seq.,  the  Resource
          Conservation and Recovery Act, 42 U.S.C.  ss. 6901, et seq.  ("RCRA"),
          and the Toxic Substances Control Act, 15 U.S.C. ss. 2601, et seq.

     (ii) "Hazardous   Material(s)"  means  any  substance,   waste,   material,
          chemical,  compound  or  mixture  which  is  (or  which  contains  any
          substance, waste, material,  chemical,  compound, or mixture which is)
          flammable,  ignitable, corrosive, reactive, radioactive, or explosive,
          as such  terms are  defined  in  Environmental  Laws,  or is  defined,
          listed,  designated,  described or characterized  under  Environmental
          Laws  or  under  any  rules,   guidances,   policies,  or  regulations
          promulgated  thereunder,  as  hazardous,   toxic,  a  contaminant,   a
          pollutant or words of similar import,  and includes without limitation
          any "hazardous  substance" under CERCLA,  any "hazardous  waste" under
          RCRA,  asbestos,  petroleum  (including  crude oil or any  fraction or
          distillate  thereof),  natural gas,  natural gas liquids and liquefied
          natural gas.

     (iii)"Release" means any spilling,  leaking,  pumping,  pouring,  emitting,
          emptying,  discharging,  injecting,  escaping,  leaching,  dumping  or
          disposing into the environment.

     (iv) "Environmental Approval(s)" means all permits, certificates, licenses,
          authorizations,  consents, instructions,  registrations, directions or
          approvals,  issued or required by Governmental Authorities pursuant to
          Environmental  Laws  with  respect  to the  operations  of  Seller  in
          connection with the Business.

     (v)  "Governmental Authorities" means any government, regulatory authority,
          governmental department, agency, commission, board, tribunal, or court
          or other law, rule or regulation-making entity having or purporting to
          have  jurisdiction  over  Environmental  Laws on behalf of the  United
          States,   or  any  state  or  other   subdivision   thereof,   or  any
          municipality.

2.15     Taxes.

(a)  ISI has at all times from and after its formation  constituted a "qualified
     subchapter  S  subsidiary"   as  such  term  is  defined  in  Code  Section
     1361(b)(3)(D)  ("QSSS") and will  continue to so  constitute a QSSS through
     the Closing.  Accordingly, as of the Closing ISI will have no liability for
     federal income tax. All Tax returns, statements,  reports, declarations and
     other forms and  documents  (including  without  limitation  estimated  Tax
     returns and reports and material  information returns and reports) required
     to be filed  with any Tax  authority  with  respect to any  Taxable  period
     ending on or before the Closing,  by or on behalf of either  Company or DRG
     Holdings  (collectively,  "Tax Returns" and  individually  a "Tax Return"),
     have been or will be completed and filed when due (including any extensions
     of such due  date) and all  amounts  shown  due on such Tax  Returns  on or
     before the  Closing  Date have been or will be paid on or before such date;
     provided that no representation is made herein with respect to any such Tax
     Returns due from either of the  Companies  after the Closing  after  giving
     effect to applicable extensions.  The Target Financial Statements (i) fully
     accrue all actual and contingent  liabilities for Taxes with respect to all
     periods through December 31, 1998 and Target has not and will not incur any
     Tax  liability  in excess of the  amount  reflected  on the  balance  sheet
     included in the Financial  Statements  with respect to such periods,  other
     than  Taxes  incurred  in the  ordinary  course of its  business  following
     December 31, 1998,  and (ii) properly  accrues in accordance  with GAAP all
     material liabilities for Taxes payable after December 31, 1998 with respect
     to all  transactions  and events  occurring  on or prior to such date.  All
     information set forth in the notes to the Financial  Statements relating to
     Tax matters is true,  complete and accurate in all  material  respects.  No
     material Tax liability  since December 31, 1998 has been incurred by either
     Company  other  than in the  ordinary  course  of  business,  and  adequate
     provision  has been made by each of the  Companies for all Taxes since that
     date in accordance with GAAP on at least a quarterly basis.

(b)  Each of the Companies has previously provided or made available to Acquiror
     true and correct copies of all income, franchise, and sales Tax Returns, as
     reasonably requested by Acquiror,  filed on or before the date hereof. Each
     of  the  Companies  has  withheld  and  paid  to the  applicable  financial
     institution  or Tax authority all amounts  required to be withheld and paid
     when due.  Neither  Company  (or any member of any  affiliated  or combined
     group of which either  Company has been a member) has granted any extension
     or waiver of the  limitation  period  applicable to any Tax Returns that is
     still  in  effect.  There  is  no  material  claim,  audit,  action,  suit,
     proceeding,  or (to the  knowledge  of either  Company)  investigation  now
     pending or (to the knowledge of either Company)  threatened against or with
     respect to either Company in respect of any Tax or assessment. No notice of
     deficiency  or similar  document of any Tax  authority has been received by
     either Company,  and there are no liabilities for Taxes with respect to the
     issues  that  have  been  raised  (and are  currently  pending)  by any Tax
     authority that could, if determined adversely to either Company, materially
     and adversely  affect the liability of either Company for Taxes.  There are
     no liens for Taxes  (other than for current  Taxes not yet due and payable)
     upon the assets of either  Company.  Neither Company has ever been a member
     of an affiliated group of corporations,  within the meaning of Section 1504
     of the Code.  Neither Company has obtained any Tax exemptions  (except that
     ISI has elected to be a QSSS)or has entered  into or become  subject to any
     Tax-sharing agreement or order of a foreign government. Neither Company nor
     any person on behalf of either  Company has entered into or will enter into
     any agreement or consent pursuant to the collapsible corporation provisions
     of Section  341(f) of the Code (or any  corresponding  provision  of state,
     local or foreign income tax law) or agreed to have Section 341(f)(2) of the
     Code (or any corresponding  provision of state, local or foreign income tax
     law) apply to any disposition of any asset owned by either Company. None of
     the assets of either Company is property that either Company is required to
     treat as being owned by any other person  pursuant to the  so-called  "safe
     harbor lease"  provisions of former Section  168(f)(8) of the Code. None of
     the assets of either  Company  directly or indirectly  secures any debt the
     interest on which is tax-exempt  under Section 103(a) of the Code.  None of
     the  assets of either  Company  is  "tax-exempt  use  property"  within the
     meaning of Section  168(h) of the Code.  Neither  Company has made nor will
     make a deemed dividend election under Treas. Reg.  ss.1.1502-32(f)(2)  or a
     consent  dividend  election under Section 565 of the Code.  Neither Company
     has ever been a party to any transaction  intended to qualify under Section
     355 of the Internal  Revenue Code or any  corresponding  provision of state
     law.  Neither  Company has  participated  in (nor will  participate  in) an
     international  boycott  within the meaning of Section  999 of the Code.  No
     Target  Stockholder is other than a United States person within the meaning
     of the Code.  Neither Company has or has had a permanent  establishment  in
     any foreign country,  as defined in any applicable tax treaty or convention
     between the United  States of America and such foreign  country and neither
     Company  has engaged in a trade or  business  within any  foreign  country.
     Neither  Company has ever elected to be treated as an  S-corporation  under
     Section 1361 of the Code or any corresponding provision of federal or state
     law, except that ISI has filed,  pursuant to Rev. Proc.  98-55, an election
     to be  treated  as a QSSS.  All  material  elections  with  respect to each
     Company's Taxes made during the fiscal years ending,  December 31, 1996 and
     1997 are  reflected  on the Tax Returns of each Company or DRG Holdings for
     such  periods,  copies of which have been  provided  or made  available  to
     Acquiror.  After the date of this  Agreement,  no  material  election  with
     respect  to  Taxes  will be made  without  the  prior  written  consent  of
     Acquiror,  which  consent  will not be  unreasonably  withheld  or delayed.
     Neither  Company  is  party to any  joint  venture,  partnership,  or other
     arrangement or contract which could be treated as a partnership for federal
     income tax purposes.  Neither Company is currently or ever has been subject
     to the reporting  requirements  of Section  6038A of the Code.  There is no
     agreement,  contract or arrangement to which either Company is a party that
     could,  individually or  collectively,  result in the payment of any amount
     that would not be  deductible  by reason of  Sections  280G (as  determined
     without regard to Section 280G(b)(4), 162 (other than 162(a)) or 404 of the
     Code.  Neither  Company  is a party to or bound by any Tax  indemnity,  Tax
     sharing  or Tax  allocation  agreement  (whether  written or  unwritten  or
     arising  under  operation of federal law as a result of being a member of a
     group filing  consolidated  Tax returns,  under  operation of certain state
     laws as a result of being a member of a unitary group, or under  comparable
     laws of other states or foreign jurisdictions) which includes a party other
     than such  Company  nor does either  Company owe any amount  under any such
     Agreement.  Neither  Company  is or has ever  been,  a United  States  real
     property holding  corporation (as defined in Section 897(c)(2) of the Code)
     during the applicable period specified in Section  897(c)(1)(A)(ii)  of the
     Code. Other than by reason of the Acquisition,  neither Company has been or
     will be required to include any material  adjustment in Taxable  income for
     any Tax period (or portion thereof)  pursuant to Section 481 or 263A of the
     Code or any  comparable  provision  under  state or  foreign  Tax laws as a
     result of transactions,  events or accounting methods employed prior to the
     Acquisition.

(c)  For purposes of this  Agreement,  the  following  terms have the  following
     meanings:  "Tax" (and,  with  correlative  meaning,  "Taxes" and "Taxable")
     means any and all taxes including,  without limitation, (i) any net income,
     alternative  or add-on minimum tax, gross income,  gross  receipts,  sales,
     use, ad valorem,  transfer,  franchise,  profits,  value added,  net worth,
     license,  withholding,   payroll,  employment,  excise,  severance,  stamp,
     occupation,  premium,  property,  environmental  or  windfall  profit  tax,
     custom,  duty or other tax  governmental  fee or other like  assessment  or
     charge of any kind  whatsoever,  together with any interest or any penalty,
     addition to tax or additional amount imposed by any Governmental  Entity (a
     "Tax  authority")  responsible for the imposition of any such tax (domestic
     or foreign),  (ii) any liability for the payment of any amounts of the type
     described  in  (i)  as a  result  of  being  a  member  of  an  affiliated,
     consolidated,  combined or unitary  group for any Taxable  period or as the
     result of being a transferee  or successor  thereof and (iii) any liability
     for the  payment of any amounts of the type  described  in (i) or (ii) as a
     result of any express or implied  obligation to indemnify any other person.
     Notwithstanding  the foregoing,  solely for purposes this Section 2.15, Tax
     (and the correlative meanings,  "Taxes" and "Taxing") shall not include any
     amount to the extent that (i) a lien, claim or encumbrance cannot be placed
     upon any of the  assets of either of the  Companies  with  respect  to such
     amount (or, in the case of an Actual Asset Transfer (as defined below), any
     of the assets  transferred in such Actual Asset  Transfer) and (ii) neither
     Acquiror nor either of the Companies nor any of their respective affiliates
     (other  than  the  officers  of DRG  Holdings)  can  be  made  directly  or
     indirectly  liable with  respect to such  amount.  As used in this  Section
     2.14,  the term  "Target"  means  Target  and any  entity  included  in, or
     required  under  GAAP  to be  included  in,  any  of the  Target  Financial
     Statements  and the term  "Company" or  "Companies  means a Company and any
     entity  included  in,  or  required  under  GAAP to be  included  in,  such
     Company's  consolidated  financial statements (including without limitation
     ORP Private Systems, Ltd.)

2.16     Employee Benefit Plans.

(a)  For all purposes under this Section 2.16 "ERISA  Affiliate" shall mean each
     person (as defined in Section 3(9) of ERISA) that, together with Target, is
     treated as a single  employer under Section 4001(b) of ERISA or Section 414
     of the Code.  Except for the plans and  agreements  listed in Schedule 2.16
     (collectively,  the  "Plans"),  Target  and  its  ERISA  Affiliates  do not
     maintain, are not a party to, do not contribute to and are not obligated to
     contribute  to, and  employees or former  employees of Target and its ERISA
     Affiliates and their dependents or survivors do not receive benefits under,
     any of the following (whether or not set forth in a written document):

     (i)  Any employee  benefit plan, as defined in section 3(3) of the Employee
          Retirement Income Security Act of 1974, as amended ("ERISA");

     (ii) Any bonus, deferred compensation,  incentive,  restricted stock, stock
          purchase,  stock option,  stock  appreciation  right,  phantom  stock,
          supplemental  pension,  executive  compensation,   cafeteria  benefit,
          dependent care, director or employee loan, fringe benefit, sabbatical,
          severance, termination pay or similar plan, program, policy, agreement
          or arrangement; or

     (iii)Any plan, program, agreement,  policy, commitment or other arrangement
          relating to the provision of any benefit  described in section 3(1) of
          ERISA to former  employees or directors or to their  survivors,  other
          than  procedures  intended  to comply  with the  Consolidated  Omnibus
          Budget Reconciliation Act of 1985 ("COBRA").

(b)  Neither  Target  nor any  ERISA  Affiliate  has,  since  January  1,  1993,
     terminated,  suspended, discontinued contributions to or withdrawn from any
     employee  pension  benefit  plan,  as  defined  in  section  3(2) of ERISA,
     including  (without  limitation)  any  multiemployer  plan,  as  defined in
     section 3(37) of ERISA.

(c)  Target has provided to Acquiror  complete,  accurate and current  copies of
     each of the following:

     (i)  The text  (including  amendments) of each of the Plans,  to the extent
          reduced to writing;

     (ii) A summary of each of the Plans,  to the extent not previously  reduced
          to writing;

     (iii)With respect to each Plan that is an employee benefit plan (as defined
          in section 3(3) of ERISA), the following:

          (1)  The most recent summary plan description, as described in section
               102 of ERISA;

          (2)  Any summary of material  modifications  that has been distributed
               to  participants  but has not  been  incorporated  in an  updated
               summary plan description  furnished under subparagraph (1) above;
               and

          (3)  The annual  report,  as  described  in section 103 of ERISA,  and
               (where applicable)  actuarial reports,  for the three most recent
               plan  years for which an annual  report or  actuarial  report has
               been prepared; and

     (iv) With  respect to each Plan that is intended to qualify  under  section
          401(a) of the Code that is not set forth in a  standardized  prototype
          document the most recent  determination  letter  concerning the plan's
          qualification  under  section  401(a)  of the  Code,  as issued by the
          Internal  Revenue  Service,  and any subsequent  determination  letter
          application.

(d)  With  respect to each Plan that is an employee  benefit plan (as defined in
     section 3(3) of ERISA),  the  requirements of ERISA applicable to such Plan
     have been satisfied,  except to the extent that a failure to satisfy any of
     such requirements would not have a Material Adverse Effect.

(e)  With  respect to each Plan that is subject to COBRA,  the  requirements  of
     COBRA  applicable  to such Plan have been  satisfied,  except to the extent
     that a  failure  to  satisfy  any of such  requirements  would  not  have a
     Material Adverse Effect.

(f)  With respect to each Plan that is subject to the Family  Medical  Leave Act
     of 1993, as amended,  the  requirements of such Act applicable to such Plan
     have been satisfied,  except to the extent that a failure to satisfy any of
     such requirements would not have a Material Adverse Effect.

(g)  Each Plan that is  intended  to qualify  under  section  401(a) of the Code
     meets the requirements for  qualification  under section 401(a) of the Code
     and the regulations thereunder, except to the extent that such requirements
     may be satisfied by adopting retroactive amendments under section 401(b) of
     the  Code  and  the  regulations  thereunder.   Each  such  Plan  has  been
     administered in accordance with its terms (or, if applicable, such terms as
     will be adopted pursuant to a retroactive amendment under section 401(b) of
     the  Code)  and the  applicable  provisions  of ERISA  and the Code and the
     regulations  thereunder,  except  to the  extent  that a  failure  to be so
     administered would not have a Material Adverse Effect.

(h)  Neither  Target  nor  any  ERISA  Affiliate  has  any  accumulated  funding
     deficiency  under section 412 of the Code or any  termination or withdrawal
     liability  under  Title IV of  ERISA,  except to the  extent  that any such
     liability would not have a Material Adverse Effect.

(i)  All  contributions,  premiums or other  payments due from the Target to (or
     under)  any Plan have been  fully paid or  adequately  provided  for on the
     books and financial  statements of Target. All accruals  (including,  where
     appropriate,  proportional  accruals for partial periods) have been made in
     accordance with prior practices.

2.17     Employees and Consultants.

(a)  Target  has  provided  Acquiror  with  a  true  and  complete  list  of all
     individuals  employed by the Company as of the date hereof and the position
     and  base  compensation  payable  to  each  such  individual.   The  Target
     Disclosure  Letter contains a description of any written or oral employment
     agreements, consulting agreements or termination or severance agreements to
     which Target is a party.

(b)  Target  is not a party  to or  subject  to a labor  union  or a  collective
     bargaining  agreement  or  arrangement  and is not a party to any  labor or
     employment dispute.

(c)  The consummation of the transactions contemplated herein will not result in
     
     (i)  except for the Target Unit Plan,  any amount  becoming  payable to any
          employee,  director  or  independent  contractor  of Target and awards
          thereunder,   (ii)   except  for  the  Target  Unit  Plan  and  awards
          thereunder,  the  acceleration  of payment or vesting of any  benefit,
          option  or  right to  which  any  employee,  director  or  independent
          contractor  of Target may be entitled,  (iii) the  forgiveness  of any
          indebtedness  of any employee,  director or independent  contractor of
          Target  or (iv) any cost  becoming  due or  accruing  to Target or the
          Acquiror  with  respect  to  any  employee,  director  or  independent
          contractor of Target.

(d)  Target is not obligated and upon  consummation of the Acquisition  will not
     be obligated  to make any payment or transfer  any  property  that would be
     considered a "parachute payment" under section 280G(b)(2) of the Code.

(e)  To the  knowledge of Target,  no employee of Target has been injured in the
     work place or in the course of his or her  employment  except for  injuries
     which are  covered  by  insurance  or for which a claim has been made under
     workers' compensation or similar laws.

(f)  Target  has  complied  in  all  material  respects  with  the  verification
     requirements and the record-keeping  requirements of the Immigration Reform
     and Control Act of 1986  ("IRCA");  to the best  knowledge  of Target,  the
     information  and  documents on which Target  relied to comply with IRCA are
     true and  correct;  and there have not been any  discrimination  complaints
     filed  against  Target  pursuant to IRCA,  and to the  knowledge of Target,
     there is no basis for the filing of such a complaint.

(g)  Target has not received or been  notified of any complaint by any employee,
     applicant,  union or other  party of any  discrimination  or other  conduct
     forbidden by law or contract,  nor to the  knowledge of Target,  is there a
     basis for any complaint,  except such complaints as could not reasonably be
     expected to have a Material Adverse Effect.

(h)  Target's  action in  complying  with the terms of this  Agreement  will not
     violate any agreements with any of Target's employees.

     (i)  Target has filed all required  reports and information with respect to
          its employees that are due prior to the Closing Date and otherwise has
          complied in its hiring, employment,  promotion,  termination and other
          labor  practices  with  all  applicable  federal  and  state  law  and
          regulations,   including   without   limitation   those   within   the
          jurisdiction  of  the  United  States  Equal  Employment   Opportunity
          Commission,  United  States  Department  of Labor  and state and local
          human rights or civil rights  agencies,  except to the extent that any
          such  failure  to file or  comply  would not have a  Material  Adverse
          Effect on the  Company.  Target  has  filed  and  shall  file any such
          reports  and  information  that are  required to be filed prior to the
          Closing Date.

(j)  Target is not aware that any of its employees or  contractors  is obligated
     under any agreement, commitments,  judgment, decree, order or otherwise (an
     "Employee  Obligation") that could reasonably be expected to interfere with
     the use of his or her best  efforts to promote the  interests  of Target or
     that could reasonably be expected to conflict with any of Target's business
     as  conducted  or  proposed to be  conducted.  Neither  the  execution  nor
     delivery  of this  Agreement  nor  the  conduct  of  Target's  business  as
     conducted or proposed, will, to Target's knowledge, conflict with or result
     in a breach of the terms,  conditions  or  provisions  of, or  constitute a
     default under, any Employee Obligation.

2.18 Related-Party Transactions.  No employee, officer, or director of Target or
member of his or her  immediate  family is  indebted  to  Target,  nor is Target
indebted (or  committed  to make loans or extend or guarantee  credit) to any of
them. None of such persons has any direct or indirect  ownership interest in any
firm or  corporation  with which Target is affiliated or with which Target has a
business  relationship,  or any firm or  corporation  that competes with Target,
except to the  extent  that  employees,  officers,  or  directors  of Target and
members of their immediate  families own stock in publicly traded companies that
may compete with the Company.  No member of the immediate  family of any officer
or  director  of Target is directly or  indirectly  interested  in any  material
contract with Target.

2.19  Insurance.  Target has policies of insurance  and bonds of the type and in
the amounts shown on Schedule 2.19. There is no material claim pending under any
of such policies or bonds as to which  coverage has been  questioned,  denied or
disputed by the  underwriters  of such  policies or bonds.  All premiums due and
payable under all such policies and bonds have been paid and Target is otherwise
in compliance with the terms of such policies and bonds. Target has no knowledge
of any threatened  termination of, or material premium increase with respect to,
any of such policies.

2.20  Compliance  with Laws.  Target has complied with, are not in violation of,
and have not  received  any notices of  violation  with respect to, any federal,
state,  local or foreign statute,  law or regulation with respect to the conduct
of its business, or the ownership or operation of its business,  except for such
violations or failures to comply as could not be  reasonably  expected to have a
Material Adverse Effect on Target.

2.21 Brokers' and Finders'  Fees.  Target has not  incurred,  nor will it incur,
directly or indirectly,  any liability for brokerage or finders' fees or agents'
commissions  or investment  bankers'  fees or any similar  charges in connection
with this Agreement or any transaction contemplated hereby.

2.22 No Vote  Required.  The  affirmative  vote of the holders of Target capital
stock is not required to approve this  Agreement and the  Transaction  Documents
and the transactions contemplated hereby and thereby.

2.23 Inventory.  The  inventories  shown on the Target Balance Sheet do not, and
the inventories as of the Closing Date will not, exceed an aggregate of $10,000.

2.24 Trade Relations.  Target has not within the past three years terminated its
relationship with or refused to ship products to any dealer,  distributor,  OEM,
third party  marketing  entity or customer  which had  theretofore  paid or been
obligated to pay Target in excess of Twenty Thousand Dollars  ($20,000) over any
consecutive  twelve (12) month period.  No claims have been  communicated or, to
Target's   knowledge,   threatened  against  Target  with  respect  to  wrongful
termination  of  any  dealer,   distributor  or  any  other  marketing   entity,
discriminatory pricing, price fixing, unfair competition,  false advertising, or
any  other  material   violation  of  any  laws  or   regulations   relating  to
anti-competitive  practices  or unfair  trade  practices  of any kind,  and,  to
Target's knowledge, no specific situation,  set of facts, or occurrence provides
any valid basis for any such claim.

2.25  Customers  and  Suppliers.  As of  the  date  hereof,  no  customer  which
individually accounted for more than 1% of Target's gross revenues during the 12
month period preceding the date hereof,  and no supplier of Target, has canceled
or  otherwise  terminated,  or made any threat to Target to cancel or  otherwise
terminate  its  relationship  with  Target  for any  reason  including,  without
limitation the consummation of the transactions  contemplated  hereby, or has at
any time on or after  December  31, 1998  decreased  materially  its services or
supplies  to  Target  in the  case of any  such  supplier,  or its  usage of the
services  or products  of Target in the case of such  customer,  and to Target's
knowledge, no such supplier or customer intends to cancel or otherwise terminate
its relationship with Target or to decrease  materially its services or supplies
to Target or its usage of the  services or  products of Target,  as the case may
be. Target has not knowingly breached, so as to provide a benefit to Target that
was  not  intended  by the  parties,  any  agreement  with,  or  engaged  in any
fraudulent conduct with respect to, any customer or supplier of Target.

2.26 Material Contracts. Except for the material contracts described in Schedule
2.26 (collectively,  the "Material Contracts") Target is not a party to or bound
by any material contract, including without limitation:

(a)  any   distributor,    sales,   advertising,    agency   or   manufacturer's
     representative contract;

(b)  any continuing contract for the purchase of materials,  supplies, equipment
     or services  involving  in the case of any such  contact  more than $20,000
     over the life of the contract;

(c)  any  contract  that  expires  or may be renewed at the option of any person
     other than the Target so as to expire  more than one year after the date of
     this Agreement;

(d)  any trust  indenture,  mortgage,  promissory  note, loan agreement or other
     contract for the borrowing of money, any currency exchange,  commodities or
     other hedging  arrangement or any leasing  transaction of the type required
     to be capitalized in accordance with GAAP;

(e)  any contract for capital expenditures in excess of $25,000 individually and
     $200,000 in the aggregate;

(f)  any  contract  limiting  the freedom of the Target to engage in any line of
     business or to compete with any other Person as that term is defined in the
     Exchange  Act,  as  defined  herein,  or any  confidentiality,  secrecy  or
     non-disclosure contract;

(g)  any contract pursuant to which Target leases any real property;

(h)  any  contract  pursuant  to  which  the  Target  leases  of any  machinery,
     equipment,  motor vehicles,  office  furniture,  fixtures or other personal
     property;

(i)  any  contract  with any person  with whom the Target does not deal at arm's
     length within the meaning of the Code;

(j)  any  agreement  of  guarantee,  support,  indemnification,   assumption  or
     endorsement of, or any similar commitment with respect to, the obligations,
     liabilities  (whether  accrued,  absolute,   contingent  or  otherwise)  or
     indebtedness of any other Person;

(k)  any license,  sublicense or other  agreement to which Target is a party (or
     by which it or any Proprietary  Rights owned or licensed by Target is bound
     or subject)  and  pursuant to which any person has been or may be assigned,
     authorized  to use,  or given  access to any  Proprietary  Rights  owned or
     licensed by Target other than (A) access to or use of standard  object code
     product  pursuant  to a  customary  non-exclusive  end-user,  object  code,
     internal-use  software license and  support/maintenance  agreements entered
     into in the  ordinary  course of  business  or (B) access  provided  in the
     ordinary   course  of  business  under  a  customary   nondisclosure/nonuse
     agreement;

(l)  any license,  sublicense  or other  agreement  pursuant to which Target has
     been or may be assigned or  authorized  to use, or has or may  incurred any
     obligation in connection  with, (A) any third party  Proprietary  Rights or
     (B) any  Target  Proprietary  Rights  other than  customary  non-exclusive,
     end-user,     object    code,    internal-use    software    license    and
     support/maintenance  agreements  entered  into in the  ordinary  course  of
     business;

(m)  any  agreement  pursuant to which  Target has  deposited  or is required to
     deposit with an escrow holder or any other person or entity, all or part of
     the source code (or any algorithm or documentation contained in or relating
     to  any  source  code)  of  any  Target   Intellectual   Property  ("Source
     Materials"); and

(n)  any agreement to  indemnify,  hold harmless or defend any other person with
     respect  to any  assertion  of  personal  injury,  damage  to  property  or
     Proprietary   Rights   infringement,   misappropriation   or  violation  or
     warranting  the  lack  thereof,   other  than  indemnification   provisions
     contained  in  a  customary  purchase  orders/purchase   agreements/product
     licenses arising in the ordinary course of business.

2.27 No Breach of  Material  Contracts.  The  Target  has  performed  all of the
obligations  required to be  performed  by it and is  entitled  to all  benefits
under, and is not alleged to be in default in respect of, any Material Contract.
Each of the Material Contracts is in full force and effect, unamended, and there
exists no default or event of default or event,  occurrence,  condition  or act,
with  respect  to Target or to  Target's  knowledge  with  respect  to the other
contracting  party, or otherwise that, with or without the giving of notice, the
lapse of the time or the  happening  of any  other  event or  conditions,  could
reasonably  be  expected  to (A) become a default or event of default  under any
Material  Contract,  which  default  or event of  default  could  reasonably  be
expected to have a Material  Adverse  Effect on Target or (B) result in the loss
or expiration of any material  right or option by Target (or the gain thereof by
any third party) under any Material  Contract or (C) the release,  disclosure or
delivery to any third party of any part of the Source  Materials  (as defined in
Section 2.26(m)).  True,  correct and complete copies of all Material  Contracts
have been delivered to the Acquiror.

2.28 Third-Party Consents.  Schedule 2.28 lists each Material Contract for which
the consent,  waiver or approval of any third party to such Material Contract is
required  thereunder in connection  with the  transactions  contemplated by this
Agreement or for such Material Contract to remain in effect without modification
after the Closing. Such list is complete and accurate.

2.29 Year 2000  Compliance.  Target's  processes  (including  but not limited to
sub-tier supplier management,  material resources planning systems,  order entry
processing, and customer billing), products,  equipment,  software and all other
technology,  accurately  processes  date data  (including,  but not  limited to,
calculating,  comparing,  sequencing,  storing and rendering) from, into, during
and between the 20th and 21st centuries,  including leap year calculations,  and
shall not  malfunction  or produce any invalid or incorrect  results as a result
of, and shall be  compatible  with in all respects  dates on or after January 1,
2000 ("Year 2000  Compliance").  Year 2000  Compliance  shall  include,  without
limitation,  date data century recognition,  calculations which accommodate same
century  and  multi-century  formulas  and date  values,  and date  data  values
correctly reflect the century.

2.30 Minute Books. The minute books of Target made available to Acquiror contain
a  complete  and  accurate  summary  of all  meetings  of  directors  and Target
Stockholders  or actions by written consent since the time of  incorporation  of
Target through the date of this Agreement, and reflect all transactions referred
to in such minutes accurately in all material respects.

2.31 Complete  Copies of Materials.  Target has delivered or made available true
and complete copies of each document which has been requested by Acquiror or its
counsel in connection with their legal and accounting review of Target.

2.32 Representations Complete. None of the representations or warranties made by
Target  herein  or in any  Schedule  hereto,  including  the  Target  Disclosure
Schedule,  or certificate  furnished by Target pursuant to this Agreement,  when
all such documents are read together in their entirety, contains or will contain
at the Closing Date any untrue  statement of a material  fact,  or omits or will
omit at the Closing Date to state any material  fact  necessary in order to make
the statements  contained herein or therein,  in the light of the  circumstances
under which made, not misleading.


                                   ARTICLE III

      ADDITIONAL REPRESENTATIONS AND WARRANTIES OF THE TARGET STOCKHOLDERS

                  Target and Target Stockholders jointly and severally represent
and warrant to Acquiror  that the  statements  contained in this Article III are
true and  correct,  except as set forth in the  Target  Disclosure  Letter.  The
Target  Disclosure  Letter shall be arranged in paragraphs  corresponding to the
numbered  and  lettered  paragraphs  contained  in  this  Article  III,  and the
disclosure in any paragraph  shall qualify only the  corresponding  paragraph in
this Article  III.  Nothing in the Target  Disclosure  Letter shall be deemed to
adequate to disclose an exception to a  representation  or warranty made herein,
however,  unless the Target  Disclosure  Letter  identifies  the exception  with
reasonable  particularity and describes the relevant facts in reasonable detail.
Without limiting the generality of the foregoing, the mere listing (or inclusion
of a copy) of a document or other item shall not be deemed  adequate to disclose
an  exception  to  a   representation   or  warranty  made  herein  (unless  the
representation or warranty has to do with the existence of the document or other
item  itself).  Any  reference  in  this  Article  III  to  an  agreement  being
"enforceable"  shall be deemed to be qualified to the extent such enforceability
is  subject  to  (i)  laws  of  general  application   relating  to  bankruptcy,
insolvency,  moratorium and the relief of debtors,  and (ii) the availability of
specific  performance,  injunctive  relief  and other  equitable  remedies.  For
purposes of this Agreement, "Target Stockholders" will be deemed to include (and
each representation and warranty will apply separately and collectively to) each
Target Stockholder unless the context otherwise requires.

3.1 Title to Target Common Stock. The Target Stockholders own the Target Shares
in the  amounts set forth on Schedule  1.2 hereof,  beneficially  and of record,
free and clear of any liens, claims,  encumbrances,  or proprietary interests of
any third party.  There is not outstanding any  subscription,  option,  warrant,
call, right or other agreement or commitment  obligating such Target Stockholder
to issue,  sell,  deliver or  transfer  (including  any right of  conversion  or
exchange  under any  outstanding  security  or other  instrument)  any shares of
capital stock of Target.

3.2 Purchase for Own Account.  The Acquiror  Common Stock to be received in the
Acquisition (the  "Acquisition  Shares") will be acquired for investment for the
Target Stockholders' own account, not as a nominee or agent, and not with a view
to the  distribution  of any part thereof,  and such Target  Stockholder  has no
present  intention  of selling,  granting  any  participation  in, or  otherwise
distributing the Acquisition  Shares.  By executing this Agreement,  such Target
Stockholder  further  represents that such Target  Stockholder does not have any
contract,  undertaking,  agreement  or  arrangement  with  any  person  to sell,
transfer or grant  participations  to such person or to any third  person,  with
respect to any of the Acquisition Shares.

3.3     Authority.

(a)  Each Target Stockholder which is a corporation has all requisite  corporate
     power and authority to enter into this Agreement and the other  Transaction
     Documents  to  which  it is a  party  and to  consummate  the  transactions
     contemplated hereby the thereby.  The execution and delivery this Agreement
     and the  other  Transaction  Documents  to  which  it is a  party,  and the
     consummation of the transactions contemplated hereby and thereby, have been
     duly  authorized  by all  necessary  corporate  action  on the part of such
     Target Stockholder.  This Agreement and the other Transaction  Documents to
     which  such  Target  Stockholder  is a party  have been duly  executed  and
     delivered by such Target  Stockholder  and constitute the valid and binding
     obligations  of such Target  Stockholder  enforceable  against  such Target
     Stockholder in accordance with their terms.

(b)  Each Target  Stockholder which is an individual has the power and authority
     and  capacity  to enter  into  this  Agreement  and the  other  Transaction
     Documents to which he or she is a party and to consummate the  transactions
     contemplated  hereby and  thereby.  All  actions on the part of such Target
     Stockholder necessary for the execution and delivery this Agreement and the
     other  Transaction  Documents to which such Target  Stockholder is a party,
     and the consummation of the transactions  contemplated  hereby and thereby,
     have been duly and validly taken.  This Agreement and the other Transaction
     Documents  to which  such  Target  Stockholder  is a party  have  been duly
     executed and delivered by such Target  Stockholder and constitute the valid
     and binding obligations of such Target Stockholder enforceable against such
     Target Stockholder in accordance with their terms

(c)  The  execution  and delivery of this  Agreement  and the other  Transaction
     Documents  by  Target  Stockholders  do not,  and the  consummation  of the
     transactions  contemplated  hereby and thereby will not,  conflict with, or
     result in any  violation  of, or default  under (with or without  notice or
     lapse  of  time,  or  both),  or  give  rise  to a  right  of  termination,
     cancellation or acceleration of any obligation or loss of any benefit under
     (i) any provision of the Articles of Incorporation or Bylaws of Target,  as
     amended,  or (ii) any material  agreement,  contract,  permit,  concession,
     franchise,  license, judgment, order, decree, statute, law, ordinance, rule
     or regulation applicable to Target Stockholders or any of his or her or its
     properties or assets.

(d)  No  consent,   approval,   order  or  authorization  of,  or  registration,
     declaration or filing with, any Governmental  Entity is required by or with
     respect  to  Target  Stockholders  in  connection  with the  execution  and
     delivery  of this  Agreement  and the other  Transaction  Documents  or the
     consummation of the transactions contemplated hereby or thereby, except for
     such   consents,   approvals,   orders,   authorizations,    registrations,
     declarations  and  filings  as  may  be  required  under  applicable  state
     securities laws and the securities laws of any foreign country.

3.4 Brokers' and Finders' Fees. Target Stockholders have not incurred, nor will
Target Stockholders incur,  directly or indirectly,  any liability for brokerage
or finders'  fees or agents'  commissions  or  investment  bankers'  fees or any
similar   charges  in  connection   with  this  Agreement  or  any   transaction
contemplated hereby.

3.5 Accredited  Investor.  Each Target Stockholder is an "accredited  investor"
within the  meaning of Rule 501  promulgated  under the U.S.  Securities  Act of
1933,  as  amended  ("Securities  Act")  and (ii) by reason of his or her or its
business and financial  experience,  such Target Stockholder has such knowledge,
sophistication and experience in business and financial matters as to be capable
of evaluating the merits and risks of the prospective investment, and is able to
bear the economic risk of such  investment and is able to afford a complete loss
of such investment.  Such Target  Stockholder  acknowledges that he or she or it
has been granted the  opportunity to ask questions of, and receive answers from,
representatives of Acquiror  concerning  Acquiror and the Acquisition Shares and
to obtain  any  additional  information  that he deems  necessary  to verify the
accuracy of the answers he or she or it received from such representatives. Such
Target Stockholder  acknowledges that he or she or it and those persons retained
by him or her or it to advise him or her or it with  respect to the tax  effects
of the  Acquisition  and the  transactions  contemplated  thereby have fully and
independently  examined the tax effects of such transactions as they may related
to him or her or it.  Acquiror makes no  representation  or warranty  whatsoever
with  respect  to  such  tax  effects,   and  such  Target  Stockholder  further
acknowledges  that  he or she  or it is not  relying  on any  representation  or
warranty of Acquiror with respect to such tax effects.

3.6  Restricted  Securities.  Each  Target  Stockholder  understands  that  the
Acquisition Shares are characterized as "restricted securities" under the United
States  federal  securities  laws  inasmuch  as they  are  being  acquired  in a
transaction  not  involving  a public  offering  and that  under  such  laws and
applicable  regulations such securities may be resold without registration under
the under the United States  Securities Act of 1933, as amended (the "Securities
Act"), only in certain limited  circumstances.  Such Target Stockholder  further
understands  that the  Acquisition  Shares may not be qualified under "blue sky"
laws of any jurisdiction. Each Target Stockholder represents that it is familiar
with Rule 144 promulgated under the Securities Act, as presently in effect,  and
understands the resale limitations imposed thereby and by the Securities Act.

3.7  Further  Limitations  on  Disposition.  Without  in any way  limiting  the
representations  set forth above, such Target Stockholder  further agrees not to
sell or otherwise  dispose of any Acquiror  Common  Stock  without  registration
under the  Securities  Act and  qualification  under the "blue  sky" laws of the
appropriate   jurisdiction,   unless  an   exemption   from   registration   and
qualification  thereunder is available. In connection with the proposed transfer
of any Acquiror Common Stock that have not been registered  under the Securities
Act, if  attempting  to transfer  such  shares,  such Target  Stockholder  shall
deliver written notice to Acquiror  describing in reasonable detail the proposed
transfer,  and, if  reasonably  requested by Acquiror,  an opinion,  in form and
substance reasonably satisfactory to Acquiror and its counsel to the effect that
such transfer of the Acquiror Common Stock may be effected without  registration
under the Securities Act and qualification under any applicable state securities
laws. It is agreed that an opinion of counsel shall not generally be required by
Acquiror  for  transactions   made  pursuant  to  Rule  144  except  in  unusual
circumstances.

3.8  Legends.  Each  Target  Stockholder   understands  that  the  certificates
evidencing the Acquisition Shares shall bear the following legend (together with
any legends  customarily placed on certificates  representing  Acquiror's Common
Stock pursuant to its Stockholders' rights plan):

                  "These   securities  have  not  been   registered   under  the
                  Securities  Act of  1933,  as  amended.  They may not be sold,
                  offered for sale,  pledged or hypothecated in the absence of a
                  registration   statement   in  effect  with   respect  to  the
                  securities   under   such  Act  or  an   opinion   of  counsel
                  satisfactory to Legato Systems, Inc. that such registration is
                  not required or unless sold pursuant to Rule 144 of such Act."

3.9  Agreement  to Retain  Shares.  Except with regard to the  transfers  among
Target Stockholders contemplated on Section 1.2 of the Target Disclosure Letter,
each  Target  Stockholder  agrees not to  transfer,  sell,  exchange,  pledge or
otherwise  dispose of or encumber (in each case, other than as a result of death
or to affiliates; provided such affiliate agrees to be subject to the covenants,
obligations  and conditions  set forth in this  Agreement) any shares of capital
stock  of  DRG  Holdings,  ISI  or  ORP,  owned  or  beneficially  held  by  him
(collectively,  the "Shares"),  or any New Shares (as defined below), or to make
any offer or agreement relating thereto, at any time prior to the Closing.  Each
Target  Stockholder  agrees  that any Shares of such  Target  Stockholder  shall
purchase or with  respect to each Target  Stockholder  shall  otherwise  acquire
beneficial  ownership  after date hereof and prior to the Closing ("New Shares")
shall be  subject  to the terms and  conditions  of this  Agreement  to the same
extent as if they constituted Shares.

3.10  Agreement  to  Vote  Shares  and  Grant  Proxy.  At  any  meeting  of  the
stockholders  of ISI or ORP called with respect to any of the following,  and on
every  action or approval  by written  consent of the  stockholders  of any such
company with respect to any of the following,  each Target Stockholder agrees to
vote the Shares and any New Shares (i) in favor of  approval  of this  Agreement
and the  transactions  contemplated  thereby,  and (ii) against  approval of any
proposal  made  in  opposition  to  or  competition  with  consummation  of  the
transactions   contemplated   by  this   Agreement   and   against  any  merger,
consolidation,  sale  of  assets,  sale  of  capital  stock,  reorganization  or
recapitalization  of DRG  Holdings,  ISI or ORP,  with any party other than with
Legato and its  affiliates  and  against  any  liquidation  or winding up of DRG
Holdings,  ISI or ORP (each of the  foregoing is  hereinafter  referred to as an
"Opposing  Proposal").  Each Target Stockholder  further agrees that such Target
Stockholder  shall not,  directly or indirectly,  solicit or encourage any offer
from any party  concerning the possible  disposition  of all or any  substantial
portion of the business,  assets or capital stock of the Companies.  In order to
effectuate the foregoing,  each Target  Stockholder  does hereby  constitute and
appoint Acquiror,  or any nominee of Acquiror,  with full power of substitution,
from the date hereof to the  termination of this  Agreement  pursuant to Section
8.1 hereof,  as its true and lawful proxy, for and in its name, place and stead,
including  the  right  to  sign  its  name  (as  shareholder)  to  any  consent,
certificate or other document relating to the DRG Holdings,  ISI or ORP that the
laws of the State of California  may permit or require,  to cause the Shares and
any New Shares to be voted in the manner  contemplated by this Section 3.10. The
parties and  proxies  named  above  shall not  exercise  this proxy on any other
matter except as provided above. The parties acknowledge that the proxy provided
for here is irrevocable and coupled with an interest.


                                   ARTICLE IV

                   REPRESENTATIONS AND WARRANTIES OF ACQUIROR

                  Acquiror   represents   and  warrants  to  Target  and  Target
Stockholders  that the  statements  contained  in this  Article  IV are true and
correct, except as set forth in the disclosure schedule delivered by Acquiror to
Target to prior to the execution and delivery of this  Agreement  (the "Acquiror
Disclosure  Letter").  The  Acquiror  Disclosure  Letter  shall be  arranged  in
paragraphs  corresponding to the numbered and lettered  paragraphs  contained in
this Article IV, and the  disclosure  in any  paragraph  shall  qualify only the
corresponding  paragraph in this Article IV. Nothing in the Acquiror  Disclosure
Letter shall be deemed to adequate to disclose an exception to a  representation
or  warranty  made  herein,  however,  unless  the  Acquiror  Disclosure  Letter
identifies  the  exception  with  reasonable  particularity  and  describes  the
relevant  facts in reasonable  detail.  Without  limiting the  generality of the
foregoing, the mere listing (or inclusion of a copy) of a document or other item
shall not be deemed  adequate to disclose an  exception to a  representation  or
warranty made herein (unless the  representation  or warranty has to do with the
existence of the document or other item  itself).  Any reference in this Article
IV to an agreement  being  "enforceable"  shall be deemed to be qualified to the
extent  such  enforceability  is  subject  to (i)  laws of  general  application
relating to bankruptcy,  insolvency,  moratorium and the relief of debtors,  and
(ii) the  availability  of  specific  performance,  injunctive  relief and other
equitable remedies.

4.1 Organization,  Standing and Power. Each of Acquiror and its subsidiaries is
a corporation  duly organized,  validly  existing and in good standing under the
laws of its jurisdiction of organization.  Each of Acquiror and its subsidiaries
has the corporate  power to own its  properties  and to carry on its business as
now being conducted and is duly qualified to do business and is in good standing
in each  jurisdiction  in  which  the  failure  to be so  qualified  and in good
standing  would  have a  Material  Adverse  Effect  on  Acquiror.  Acquiror  has
delivered a true and correct copy of the Certificate of Incorporation and Bylaws
of Acquiror,  each as amended to date,  to Target.  Acquiror is not violation of
any of the provisions of its Certificate of Incorporation or Bylaws. Acquiror is
the owner of all outstanding shares of capital stock of each of its subsidiaries
and all  such  shares  are  duly  authorized,  validly  issued,  fully  paid and
nonassessable.  All of the  outstanding  shares  of  capital  stock of each such
subsidiary are owned by Acquiror free and clear of all liens, charges, claims or
encumbrances  or  rights of  others.  There  are no  outstanding  subscriptions,
options,  warrants, puts, calls, rights,  exchangeable or convertible securities
or other  commitments  or agreements of any character  relating to the issued or
unissued capital stock or other securities of any such subsidiary,  or otherwise
obligating Acquiror or any such subsidiary to issue,  transfer,  sell, purchase,
redeem or  otherwise  acquire any such  securities.  Except as  disclosed in the
Acquiror SEC Documents  (as defined in Section 4.5),  Acquiror does not directly
or indirectly own any equity or similar interest in, or any interest convertible
or  exchangeable  or  exercisable  for,  any equity or similar  interest in, any
corporation, partnership, joint venture or other business association or entity.

4.2 Capital  Structure.  The authorized  capital stock of Acquiror  consists of
100,000,000  shares of Common Stock,  $.0001 par value,  and 5,000,000 shares of
Preferred Stock, $.0001 par value, of which there were issued and outstanding as
of  December  31,  1998,  35,798,000  shares  of  Common  Stock and no shares of
Preferred  Stock.  There are no other  outstanding  shares of  capital  stock or
voting  securities of Acquiror other than shares of Acquiror Common Stock issued
after  December  31,  1998,  upon  (i) the  exercise  of  options  issued  under
Acquiror's  1995 Stock  Option/Stock  Issuance Plan (the "Acquiror  Stock Option
Plan") or (ii) the exercise of subscription  rights  outstanding as of such date
under the Acquiror  Employee  Stock  Purchase Plan (the  "Acquiror  ESPP").  All
outstanding shares of Acquiror have been duly authorized,  validly issued, fully
paid and are nonassessable and free of any liens or encumbrances  other than any
liens or encumbrances created by or imposed upon the holders thereof and are not
subject to preemptive  rights,  rights of first refusal or other similar  rights
created by statute,  the Certificate of  Incorporation  or Bylaws of Acquiror or
any  agreement  to which  Acquiror  is a party or by  which it is  bound.  As of
December 31, 1998,  Acquiror had reserved (i)  8,368,000  shares of Common Stock
for issuance to employees, directors and independent contractors pursuant to the
Acquiror  Stock  Option  Plan,  of  which   5,174,565   shares  are  subject  to
outstanding,  unexercised options, and (ii) 1,600,000 shares of Common Stock for
issuance to employees pursuant to the Acquiror ESPP, of which 929,113 shares are
available  for  issuance.  Other than as set forth above and the  commitment  to
issue shares of Common Stock  pursuant to this  Agreement  and the Agreement and
Plan of  Reorganization  dated as of October 25, 1998 by and among  Acquiror,  a
wholly owned  subsidiary of Acquiror and Qualix Group,  Inc. (the "Agreement and
Plan of Reorganization"),  there are no other options,  warrants, calls, rights,
commitments  or agreements  of any character to which  Acquiror is a party or by
which  either of them is bound  obligating  Acquiror  to issue,  deliver,  sell,
repurchase or redeem,  or cause to be issued,  delivered,  sold,  repurchased or
redeemed,  any shares of the capital stock of Acquiror or obligating Acquiror to
grant, extend or enter into any such option, warrant, call, right, commitment or
agreement.

4.3     Authority.

(a)  Acquiror has all requisite corporate power and authority to enter into this
     Agreement  and  the  other  Transaction  Documents  and to  consummate  the
     transactions contemplated hereby and thereby. The execution and delivery of
     this Agreement and the other Transaction  Documents and the consummation of
     the transactions  contemplated hereby and thereby have been duly authorized
     by all necessary  corporate action on the part of Acquiror.  This Agreement
     and the other  Transaction  Documents have been duly executed and delivered
     by Acquiror and constitute  the valid and binding  obligations of Acquiror,
     enforceable against Acquiror in accordance with their terms.

(b)  The  execution  and delivery of this  Agreement  and the other  Transaction
     Documents do not, and the  consummation  of the  transactions  contemplated
     hereby and thereby will not,  conflict with, or result in any violation of,
     or default  under (with or without  notice or lapse of time,  or both),  or
     give rise to a right of  termination,  cancellation  or acceleration of any
     obligation or loss of a benefit  under,  or require a consent to assignment
     or a notation under (i) any provision of the  Certificate of  Incorporation
     or Bylaws of Acquiror or any of its subsidiaries,  as amended,  or (ii) any
     contract,  agreement,  permit,  concession,  franchise,  license, judgment,
     order, decree,  statute,  law, ordinance,  rule or regulation applicable to
     Acquiror or any of its  subsidiaries or any of their  properties or assets,
     except in the case of  clause  (ii) as would  not have a  Material  Adverse
     Effect on Acquiror and its subsidiaries, taken as a whole. .

(c)  No  consent,   approval,   order  or  authorization  of,  or  registration,
     declaration or filing with, any Governmental Entity, is required by or with
     respect to  Acquiror  or any of its  subsidiaries  in  connection  with the
     execution and delivery of this Agreement or the other Transaction Documents
     by  Acquiror  or  the   consummation   by  Acquiror  of  the   transactions
     contemplated  hereby or  thereby,  except  for (i) the filing of a Form 8-K
     with the SEC and National Association of Securities Dealers ("NASD") within
     15 days after the Closing Date,  (ii) any filings as may be required  under
     applicable  state  securities  laws,  the  securities  laws of any  foreign
     country and the HSR Act, (iii) the filing with the Nasdaq  National  Market
     of a Notification Form for Listing of Additional Shares with respect to the
     shares of  Acquiror  Common  Stock,  (iv) the  filing  of the  Registration
     Statement on Form S-3 (or any other successor form) with the Securities and
     Exchange  Commission  (the "SEC") in accordance with the Securities Act and
     (v)  such  other   consents,   authorizations,   filings,   approvals   and
     registrations  that,  if not  obtained  or made,  would not have a Material
     Adverse Effect on Acquiror and would not prevent, materially alter or delay
     the consummation of the Acquisition.

4.4 Valid  Issuance.  The shares of Acquiror Common Stock to be issued pursuant
to the Acquisition  will be duly  authorized,  validly  issued,  fully paid, and
non-assessable,  will not be subject to any preemptive or other  statutory right
of Acquiror  stockholders,  will be issued in compliance  with  applicable  U.S.
Federal and state  securities laws and will be free of any liens or encumbrances
other than any liens or encumbrances  (i) created by or imposed upon the holders
thereof or (ii) arising  under this  Agreement or  applicable  federal and state
securities laws.

4.5 SEC Documents; Financial Statements.  Acquiror has made available to Target
a true and complete copy of each statement, report, registration statement (with
the prospectus in the form filed pursuant to Rule 424(b) of the Securities Act),
definitive  proxy  statement,  and other  filing  filed with the SEC by Acquiror
since  January 1, 1997,  and,  prior to the  Closing  Date,  Acquiror  will have
furnished Target with true and complete copies of any additional documents filed
with the SEC by Acquiror prior to the Closing Date (collectively,  the "Acquiror
SEC  Documents").  As of  their  respective  filing  dates  (or  if  amended  or
superseded  by a  filing  prior  to the  date  hereof,  then on the date of such
subsequent filing), the Acquiror SEC Documents complied in all material respects
with the  requirements  of the Exchange Act and the Securities  Act, and none of
the Acquiror SEC Documents  contained any untrue statement of a material fact or
omitted to state a material fact  required to be stated  therein or necessary to
make the statements made therein,  in light of the  circumstances  in which they
were made,  not  misleading,  except to the  extent  corrected  by a  subsequent
Acquiror SEC Document file on or before the Closing. The financial statements of
Acquiror,  including the notes  thereto,  included in the Acquiror SEC Documents
(the "Acquiror Financial  Statements") fairly present the consolidated financial
condition   and  the  related   consolidated   statements  of   operations,   of
stockholder's  equity, and of cash flows of Acquiror at the dates and during the
periods  indicated  therein (subject,  in the case of unaudited  statements,  to
normal,  recurring  year-end  adjustments),  complied as to form in all material
respects with applicable  accounting  requirements  and with the published rules
and  regulations of the SEC with respect thereto as of their  respective  dates,
and have been  prepared in  accordance  with GAAP applied on a basis  consistent
throughout the periods  indicated and consistent  with each other (except as may
be  indicated  in the  notes  thereto  or, in the case of  unaudited  statements
included in  Quarterly  Reports on Form  10-Qs,  as  permitted  by Form 10-Q and
Regulation S-K of the SEC).

4.6 Absence of Certain Changes. Since September 30, 1998 (the "Acquiror Balance
Sheet  Date"),  Acquiror  has  conducted  its  business in the  ordinary  course
consistent  with past practice and there has not occurred any (i) change,  event
or  condition  (whether or not covered by  insurance)  that has  resulted in, or
might reasonably be expected to result in, a Material Adverse Effect on Acquiror
or (ii)  any  change  by  Acquiror  in its  accounting  methods,  principles  or
properties.

4.7 Litigation.  Except as disclosed in the Acquiror SEC Documents, there is no
private  or  governmental  action,  suit,  proceeding,   claim,  arbitration  or
investigation pending before any agency, court or tribunal, foreign or domestic,
or, to the knowledge of Acquiror or any of its subsidiaries,  threatened against
Acquiror or any of its subsidiaries or any of their respective properties or any
of their  respective  officers or directors (in their  capacities as such) that,
individually  or in the  aggregate,  could  reasonably  be  expected  to  have a
Material  Adverse  Effect on  Acquiror.  There is no  judgment,  decree or order
against  Acquiror or any of its subsidiaries or, to the knowledge of Acquiror or
any of its subsidiaries, any of their respective directors or officers (in their
capacities as such) that could prevent, enjoin, or materially alter or delay any
of the transactions  contemplated by this Agreement, or that could reasonably be
expected to have a Material Adverse Effect on Acquiror.

4.8 Compliance with Laws.  Each of Acquiror and its  subsidiaries  has complied
with, is not in violation of, and has not received any notices of violation with
respect to, any federal, state, local or foreign statute, law or regulation with
respect to the conduct of its  business,  or the  ownership  or operation of its
business,  except  for such  violations  or  failures  to comply as could not be
reasonably expected to have a Material Adverse Effect on Acquiror.

4.9  Representations  Complete.  None  of the  representations,  warranties  or
statements  made by Acquiror  herein or in any Schedule  hereto,  including  the
Acquiror  Disclosure  Letter,  or certificate  furnished by Acquiror pursuant to
this Agreement, or the Acquiror SEC Documents,  when all such documents are read
together in their  entirety,  contains or will  contain at the Closing  Date any
untrue  statement of a material  fact, or omits or will omit at the Closing Date
to state any material fact necessary in order to make the  statements  contained
herein or therein,  in the light of the  circumstances  under  which  made,  not
misleading.


                                    ARTICLE V

                        CONDUCT PRIOR TO THE CLOSING DATE

5.1  Conduct of  Business  of Target.  During the period  from the date of this
Agreement and continuing  until the earlier of the termination of this Agreement
or the Closing Date, Target agrees (except to the extent expressly  contemplated
by this  Agreement or as consented to in writing by the other),  to carry on its
and its  subsidiaries'  business in the usual,  regular and  ordinary  course in
substantially the same manner as heretofore conducted.  DRG Holdings and Target,
as applicable,  further agrees to (i) pay and to cause its  subsidiaries  to pay
debts and Taxes  when due  subject  to good  faith  disputes  over such debts or
Taxes, (ii) subject to Acquiror's  consent to the filing of material Tax Returns
if applicable,  to pay or perform other  obligations  when due, (iii) to use all
reasonable efforts consistent with past practice and policies to preserve intact
its and its  subsidiaries'  present business  organizations,  keep available the
services of its and its  subsidiaries'  present  officers and key  employees and
preserve its and its  subsidiaries'  relationships  with  customers,  suppliers,
distributors,  licensors, licensees, and others having business dealings with it
or its  subsidiaries,  to the end that its and its  subsidiaries'  goodwill  and
ongoing  businesses  shall be unimpaired at the Closing Date and (iv) to provide
all assistance  reasonably  requested by Acquiror's  independent  accountants to
audit the Financial  Statements provided that Acquiror pay the fees and expenses
of such  accountants in conducting such audit).  Without limiting the foregoing,
DRG Holdings agrees to continue to provide ISI with funds  reasonably  necessary
to fund  ISI's  business  (including  by making  transfers  to the  Intracompany
Account (as defined below)) in a manner  consistent with the way DRG Holdings is
currently  funding ISI's business.  Target agrees to promptly notify Acquiror of
any event or occurrence not in the ordinary  course of its or its  subsidiaries'
business, and of any event which could have a Material Adverse Effect on Target.
Without  limiting  the  foregoing,  except  as  expressly  contemplated  by this
Agreement,  Target  shall not cause or permit  any of the  following,  or allow,
cause or  permit  any of its  subsidiaries  to do,  cause or  permit  any of the
following, without the prior written consent of Acquiror:

(a)  Charter  Documents.  Cause or permit any  amendments to its  Certificate or
     Articles of Incorporation or Bylaws;

(b)  Dividends;  Changes in Capital  Stock.  Declare or pay any  dividends on or
     make any  other  distributions  (whether  in cash,  stock or  property)  in
     respect of any of its capital stock, or split, combine or reclassify any of
     its  capital  stock  or  issue  or  authorize  the  issuance  of any  other
     securities in respect of, in lieu of or in  substitution  for shares of its
     capital stock, or repurchase or otherwise acquire,  directly or indirectly,
     any shares of its capital stock except from former employees, directors and
     consultants in accordance with  agreements  providing for the repurchase of
     shares  in  connection  with  any  termination  of  service  to it  or  its
     subsidiaries;

(c)  Material Contracts. Enter into any material contract, agreement, license or
     commitment, or violate, amend or otherwise modify or waive any of the terms
     of any of its material contracts,  agreements or licenses other than in the
     ordinary course of business consistent with past practice;

(d)  Stock Option and Stock  Incentive  Plans,  etc.  Except as  contemplated by
     Section 2.3,  accelerate,  amend or change the period of  exercisability or
     vesting of options or other rights  granted  under its stock and  incentive
     plans or  authorize  cash  payments  in  exchange  for any options or other
     rights granted under any of such plans;

(e)  Issuance of Securities.  Issue, deliver or sell or authorize or propose the
     issuance,  delivery or sale of, or purchase or propose the purchase of, any
     shares  of  its  capital   stock  or   securities   convertible   into,  or
     subscriptions,  rights, warrants or options to acquire, or other agreements
     or commitments  of any character  obligating it to issue any such shares or
     other  convertible  securities,  other than the  issuance  of shares of its
     Common Stock pursuant to the exercise of stock  options,  warrants or other
     rights therefor outstanding as of the date of this Agreement;

(f)  Intellectual  Property.  Transfer  to or  license  any  person or entity or
     otherwise extend,  amend or modify any rights to its Intellectual  Property
     other than the grant of  non-exclusive  licenses in the ordinary  course of
     business consistent with past practice;

(g)  Exclusive Rights.  Enter into or amend any agreements pursuant to which any
     other  party  is  granted  exclusive  marketing,   manufacturing  or  other
     exclusive  rights of any type or scope with  respect to any of its products
     or technology;

(h)  Dispositions.  Sell, lease, license or otherwise dispose of or encumber any
     of its  properties  or assets which are  material,  individually  or in the
     aggregate, to its and its subsidiaries' business,  taken as a whole, except
     for  dispositions in the ordinary  course of business  consistent with past
     practice;

(i)  Indebtedness.  Except for indebtedness  incurred by ISI pursuant to Section
     6.16,  incur or commit  to incur any  indebtedness  for  borrowed  money or
     guarantee  any such  indebtedness  or issue or sell any debt  securities or
     guarantee any debt securities of others;

(j)  Leases.  Enter into any  operating  lease  requiring  payments in excess of
     $10,000;

(k)  Payment of Obligations. Pay, discharge or satisfy in an amount in excess of
     $10,000 in any one case or $25,000 in the aggregate,  any claim,  liability
     or obligation  (absolute,  accrued,  asserted or unasserted,  contingent or
     otherwise)  arising  other than in the ordinary  course of business,  other
     than the payment,  discharge or  satisfaction  of liabilities  reflected or
     reserved  against  in  the  Target  Financial  Statements  or  specifically
     identified on the Target Disclosure Letter;

(l)  Capital Expenditures.  Incur or commit to incur any capital expenditures in
     excess of $50,000 in the aggregate,  except as  specifically  identified in
     the Target Disclosure Letter;

(m)  Insurance.  Materially reduce the amount of any material insurance coverage
     provided by existing insurance policies;

(n)  Termination or Waiver.  Terminate or waive any right of substantial  value,
     other than in the ordinary course of business;

(o)  Employee Benefits;  Severance.  Except as contemplated by Section 2.3, take
     any of the  following  actions:  (i)  increase  or  agree to  increase  the
     compensation  payable or to become  payable to its  officers or  employees,
     except for  increases  in salary or wages of  non-officer  employees in the
     ordinary  course of business and in accordance  with past  practices,  (ii)
     grant any  additional  severance or  termination  pay to, or enter into any
     employment or severance  agreements  with,  any officer or employee,  (iii)
     enter into any collective  bargaining  agreement,  (iv)  establish,  adopt,
     enter into or amend in any  material  respect  any bonus,  profit  sharing,
     thrift, compensation,  stock option, restricted stock, pension, retirement,
     deferred compensation,  employment,  termination,  severance or other plan,
     trust,  fund,  policy or  arrangement  for the  benefit  of any  directors,
     officers or employees,  or (v) award or increase interests under the Target
     Unit Plan;

(p)  Lawsuits.  Commence a lawsuit or arbitration  proceeding other than (i) for
     the routine collection of bills, or (ii) for a breach of this Agreement;

(q)  Acquisitions. Acquire or agree to acquire by merging or consolidating with,
     or by  purchasing a  substantial  portion of the assets of, or by any other
     manner, any business or any corporation,  partnership, association or other
     business organization or division thereof, or otherwise acquire or agree to
     acquire any assets which are material, individually or in the aggregate, to
     its and its subsidiaries' business, taken as a whole;

(r)  Taxes.  Make any material tax election other than in the ordinary course of
     business  and  consistent  with past  practice,  change  any  material  tax
     election, adopt any tax accounting method other than in the ordinary course
     of business and consistent  with past  practice,  change any tax accounting
     method,  file  any tax  return  (other  than  any  estimated  tax  returns,
     immaterial  information returns,  payroll tax returns or sales tax returns)
     or any amendment to a tax return, enter into any closing agreement,  settle
     any Tax claim or  assessment  or  consent  to any Tax  claim or  assessment
     provided that Acquiror shall not unreasonably withhold or delay approval of
     any of the foregoing actions;

(s)  Revaluation.  Revalue  any  of its  assets,  including  without  limitation
     writing  down the value of  inventory  or  writing  off  notes or  accounts
     receivable other than in the ordinary course of business; or

(t)  Other.  Take or agree in writing or otherwise  to take,  any of the actions
     described in Sections  4.2(a) through (s) above,  or any action which would
     make any of its  representations or warranties  contained in this Agreement
     untrue  or  incorrect  or  prevent  it from  performing  or cause it not to
     perform its covenants hereunder.

5.2 Notices. Target shall give all notices and other information required to be
given to the employees of Target,  any collective  bargaining unit  representing
any group of employees of Target, and any applicable  government authority under
the National Labor  Relations Act, the Internal  Revenue Code, the  Consolidated
Omnibus Budget  Reconciliation  Act, and other applicable law in connection with
the transactions provided for in this Agreement;


                                   ARTICLE VI

                              ADDITIONAL AGREEMENTS

6.1     No Solicitation.

(a)  From and after the date of this  Agreement  until the Closing Date,  Target
     shall not, directly or indirectly, through any officer, director, employee,
     representative or agent, (i) solicit,  initiate, or encourage any inquiries
     or proposals that constitute, or could reasonably be expected to lead to, a
     proposal or offer for a Acquisition,  consolidation,  business combination,
     sale of all or substantially  all of the assets,  sale of shares of capital
     stock  (including  without  limitation by way of a tender offer) or similar
     transactions  involving  Target,  or  transactions  inconsistent  with  the
     Acquisition,  other than the  transactions  contemplated  by this Agreement
     (any of the  foregoing  inquiries  or proposals  being  referred to in this
     Agreement  as a  "Takeover  Proposal"),  (ii)  engage  in  negotiations  or
     discussions concerning, or provide any non-public information to any person
     or entity relating to, any Takeover Proposal, or (iii) agree to, approve or
     recommend any Takeover Proposal.

(b)  Target shall notify Acquiror immediately (and no later than 24 hours) after
     receipt by Target (or its advisors or agents) of any  Takeover  Proposal or
     any request for information in connection  with a Takeover  Proposal or for
     access to the  properties,  books or  records  of  Target by any  person or
     entity that informs  Target that it is considering  making,  or has made, a
     Takeover  Proposal.  Such  notice  shall be made  orally and in writing and
     shall  indicate in  reasonable  detail the  identity of the offeror and the
     terms and conditions of such proposal, inquiry or contact.

6.2     Access to Information.

(a)  Target  shall  afford  Acquiror  and its  accountants,  counsel  and  other
     representatives,  reasonable access during normal business hours during the
     period  prior  to  the  Closing  Date  to  (i)  all  of  Target's  and  its
     subsidiaries'  properties,  books, contracts,  commitments and records, and
     (ii)  all  other  information  concerning  the  business,   properties  and
     personnel  of  Target  and its  subsidiaries  as  Acquiror  may  reasonably
     request. Target agrees to provide to Acquiror and its accountants,  counsel
     and other representatives  copies of internal financial statements promptly
     upon request.

(b)  Subject to compliance  with  applicable law, from the date hereof until the
     Closing  Date,  each of Acquiror  and Target  shall confer on a regular and
     frequent  basis  with one or more  representatives  of the  other  party to
     report operational matters of materiality and the general status of ongoing
     operations.

(c)  No information or knowledge obtained in any investigation  pursuant to this
     Section  6.2 shall  affect or be deemed  to modify  any  representation  or
     warranty  contained  herein or the  conditions  to the  obligations  of the
     parties to consummate the Acquisition.

6.3  Confidentiality.  The parties  acknowledge  that  Acquiror and Target have
previously  executed a  non-disclosure  agreement  dated  December 23, 1998 (the
"Confidentiality Agreement"),  which Confidentiality Agreement shall continue in
full force and effect in accordance with its terms.

6.4 Public  Disclosure.  Unless otherwise required by law, prior to the Closing
Date, no disclosure  (whether or not in response to an inquiry) shall be made by
any party hereto  regarding the subject matter of this Agreement unless approved
by Acquiror prior to release.  Any public announcement by Acquiror regarding the
subject matter of this Agreement shall be delivered to Target prior to release.

6.5     Consents; Cooperation.

(a)  Each of Acquiror and Target shall promptly apply for or otherwise seek, and
     use all reasonable  efforts to obtain,  all consents and approvals required
     to be obtained by it for the  consummation of the Acquisition and shall use
     all  commercially  reasonable  efforts  to obtain all  necessary  consents,
     waivers and  approvals  under any of its material  contracts in  connection
     with the Acquisition for the assignment  thereof or otherwise.  The parties
     hereto will consult and  cooperate  with one another,  and consider in good
     faith  the  views  of  one  another,   in  connection  with  any  analyses,
     appearances,  presentations,  memoranda,  briefs,  arguments,  opinions and
     proposals  made  or  submitted  by or on  behalf  of any  party  hereto  in
     connection with  proceedings  under or relating to HSR or any other federal
     or state antitrust or fair trade law.

(b)  Each of Acquiror and Target shall use all commercially  reasonable  efforts
     to resolve such objections,  if any, as may be asserted by any Governmental
     Entity with  respect to the  transactions  contemplated  by this  Agreement
     under the HSR,  the Sherman  Act, as amended,  the Clayton Act, as amended,
     the Federal Trade Commission Act, as amended, and any other Federal,  state
     or  foreign  statutes,  rules,  regulations,  orders  or  decrees  that are
     designed to prohibit,  restrict or regulate  actions  having the purpose or
     effect of  monopolization or restraint of trade  (collectively,  "Antitrust
     Laws"). In connection  therewith,  if any administrative or judicial action
     or proceeding is instituted (or  threatened to be  instituted)  challenging
     any  transaction  contemplated  by  this  Agreement  as  violative  of  any
     Antitrust  Law,  each of Acquiror  and Target shall  cooperate  and use all
     commercially  reasonable  efforts vigorously to contest and resist any such
     action or proceeding and to have vacated,  lifted,  reversed, or overturned
     any  decree,  judgment,  injunction  or  other  order,  whether  temporary,
     preliminary  or  permanent  (each an  "Order"),  that is in effect and that
     prohibits,  prevents,  or restricts  consummation of the Acquisition or any
     such other  transactions,  unless by mutual  agreement  Acquiror and Target
     decide  that  litigation  is  not  in  their   respective  best  interests.
     Notwithstanding the provisions of the immediately preceding sentence, it is
     expressly  understood  and agreed that Acquiror shall have no obligation to
     litigate or contest any  administrative or judicial action or proceeding or
     any Order beyond the earlier of (i) the date  specified  in Section  8.1(b)
     (or any later date permitted  pursuant to the proviso in Section 8.1(b)) or
     (ii) the date of a ruling preliminarily enjoining the Acquisition issued by
     a court of  competent  jurisdiction.  Each of Acquiror and Target shall use
     all commercially  reasonable efforts to take such action as may be required
     to cause  the  expiration  of the  notice  periods  under  the HSR or other
     Antitrust  Laws with respect to such  transactions  as promptly as possible
     after the execution of this Agreement.

(c)  Notwithstanding  the  foregoing,  neither  Acquiror  nor  Target  shall  be
     required to agree,  as a condition to any Approval,  to divest itself of or
     hold separate any  subsidiary,  division or business unit which is material
     to the business of such party and its  subsidiaries,  taken as a whole,  or
     the divestiture or holding separate of which would be reasonably  likely to
     have a Material  Adverse  Effect on (A) the business,  properties,  assets,
     liabilities, financial condition or results of operations of such party and
     its  subsidiaries,  taken as a whole  or (B) the  benefits  intended  to be
     derived as a result of the Acquisition.

6.6  Update  Disclosure;  Breaches.  From and after the date of this  Agreement
until the Closing Date, each party hereto shall promptly notify the other party,
by  written  update  to its  Disclosure  Schedule,  of  (i)  the  occurrence  or
non-occurrence  of any event which would be likely to cause any condition to the
obligations of any party to effect the  Acquisition  and the other  transactions
contemplated  by this  Agreement  not to be  satisfied,  or (ii) the  failure of
Target or Acquiror,  as the case may be, to comply with or satisfy any covenant,
condition or  agreement to be complied  with or satisfied by it pursuant to this
Agreement which would be likely to result in any condition to the obligations of
any party to effect the Acquisition and the other  transactions  contemplated by
this Agreement not to be satisfied.  The delivery of any notice pursuant to this
Section  6.6  shall  not cure  any  breach  of any  representation  or  warranty
requiring  disclosure  of such  matter  prior to the date of this  Agreement  or
otherwise  limit  or  affect  the  remedies  available  hereunder  to the  party
receiving such notice.

6.7 Legal Requirements.  Each of Acquiror and Target will, and will cause their
respective  subsidiaries  to, take all  reasonable  actions  necessary to comply
promptly with all legal  requirements  which may be imposed on them with respect
to the consummation of the transactions  contemplated by this Agreement and will
promptly cooperate with and furnish information to any party hereto necessary in
connection  with  any  such  requirements  imposed  upon  such  other  party  in
connection  with  the  consummation  of the  transactions  contemplated  by this
Agreement  and will take all  reasonable  actions  necessary to obtain (and will
cooperate  with the other parties  hereto in obtaining)  any consent,  approval,
order or authorization of, or any registration,  declaration or filing with, any
Governmental  Entity  or  other  person,  required  to be  obtained  or  made in
connection with the taking of any action contemplated by this Agreement.

6.8 Blue Sky Laws. Acquiror shall take such steps as may be necessary to comply
with the securities and blue sky laws of all jurisdictions  which are applicable
to the issuance of the Acquiror Common Stock in connection with the Acquisition.
Target  shall use its best  efforts to assist  Acquiror as may be  necessary  to
comply  with the  securities  and blue sky laws of all  jurisdictions  which are
applicable  in  connection  with  the  issuance  of  Acquiror  Common  Stock  in
connection with the Acquisition.

6.9 Certain Stock Rights.  On the Closing Date,  DRG Holdings shall pay to each
holder of rights  pursuant  to the  Target  Unit Plan the cash  amount set forth
opposite  such  holder's  name on Schedule 2.3 hereof.  Target has  delivered to
Acquiror a Schedule 2.3 which sets forth a true and complete list as of the date
hereof of each holder of an outstanding  interest under the Target Unit Plan and
the cash payment due in full satisfaction of such interest.

6.10 Escrow  Agreement.  On or before the Closing Date,  the parties to the
Escrow Agreement shall execute and deliver the Escrow Agreement.

6.11 Additional  Agreements;  Reasonable Efforts.  Each of the parties agrees to
use all reasonable  efforts to take, or cause to be taken, all action and to do,
or cause to be done, all things necessary,  proper or advisable under applicable
laws  and  regulations  to  consummate  and  make  effective  the   transactions
contemplated  by this  Agreement,  including  cooperating  fully  with the other
party,  including  by provision  of  information.  In case at any time after the
Closing  Date any further  action is  necessary  or  desirable  to carry out the
purposes  of  this  Agreement  or to  vest  Acquiror  with  full  title  to  all
properties, assets, rights, approvals,  immunities and franchises of Target, the
proper  officers and  directors of each party to this  Agreement  shall take all
such necessary action.

6.12 Employee  Benefits.  Acquiror shall take such  reasonable  actions,  to the
extent  permitted by  Acquiror's  benefits  program,  as are  necessary to allow
eligible employees of Target to participate in the benefit programs of Acquiror,
or alternative  benefits programs in the aggregate  substantially  comparable to
those  applicable  to  employees  of  Acquiror  on  similar  terms,  as  soon as
practicable  after the Closing Date of the Acquisition.  To the extent permitted
by Acquiror's  benefit  plans,  from and after the Closing Date,  Acquiror shall
grant all  employees  of Target  credit for all  service  (to the same extent as
service with  Acquiror is taken into account with respect to similarly  situated
employees of Acquiror) with Target prior to the Closing Date for (i) eligibility
purposes and (ii) for purposes of vacation  accrual after the Closing Date as if
such service with Target was service with Acquiror.

6.13     Registration Requirements.

(a)  As soon as  reasonably  practicable  and in any event no later than one (1)
     business  day  after  the  Closing,  Acquiror  shall  prepare  and  file  a
     registration  statement  with the SEC under the  Securities Act to register
     the resale of the Acquiror Shares ("Registrable Securities") and thereafter
     shall use its commercially  reasonable  efforts to secure the effectiveness
     of such registration statement.

(b)  Acquiror  shall  pay  all  Registration  Expenses  (as  defined  below)  in
     connection with any registration qualification or compliance hereunder, and
     each  holder of  Registrable  Securities  ("Holder")  shall pay all Selling
     Expense (as defined  below) and other  expenses  that are not  Registration
     Expenses  relating to the  Registrable  Securities  resold by such  Holder.
     "Registration  Expenses"  shall  mean  all  expenses,  except  for  Selling
     Expenses,   incurred  by  Acquiror  in  complying  with  the   registration
     provisions   herein   described,   including,   without   limitation,   all
     registration,  qualification  and filing fees,  printing  expenses,  escrow
     fees,  fees and  disbursements  of counsel for Acquiror,  blue sky fees and
     expenses and the expense of any special  audits  incident to or required by
     any  such   registration.   "Selling   Expenses"  shall  mean  all  selling
     commissions, underwriting fees (if any) and stock transfer taxes applicable
     to the Registrable Securities and all fees and disbursements of counsel for
     any Holder.

(c)  In the case of any  registration  effected  by  Acquiror  pursuant to these
     registration  provisions,  Acquiror  will use its  commercially  reasonable
     efforts to: (i) keep such  registration  effective until the earlier of (A)
     eighteen  (18) months  after the Closing  Date or (B) such date as Acquiror
     shall be  satisfied  that the  then-current  Holders  may sell all of their
     Registrable  Securities then  outstanding  within a three (3) month period;
     (ii) prepare and file with the SEC such  amendments and supplements to such
     registration  statement and the  prospectus  used in  connection  with such
     registration  statements as may be necessary to comply with the  provisions
     of the  Securities  Act with respect to the  disposition  of all securities
     covered  by such  registration  statement;  (iii)  furnish  such  number of
     prospectuses and other documents incident thereto,  including any amendment
     of or  supplement  to the  prospectus,  as a Holder  from  time to time may
     reasonably  request;  (iv)  use  its  commercially  reasonable  efforts  to
     register and qualify the securities covered by such registration  statement
     under such other securities or Blue Sky laws of such jurisdictions as shall
     be reasonably requested by the Holders, provided that Acquiror shall not be
     required in connection therewith or as a condition thereto to qualify to do
     business  or to file a general  consent  to  service of process in any such
     states  or  jurisdictions;   (v)  cause  all  such  Registrable  Securities
     registered as described herein to be listed on each securities exchange and
     quoted on each  quotation  service on which  similar  securities  issued by
     Acquiror  are then  listed or quoted;  (vi)  provide a  transfer  agent and
     registrar  for  all  Registrable  Securities  registered  pursuant  to such
     registration  statement and a CUSIP number for all Registrable  Securities;
     and (vii) otherwise use its commercially  reasonable efforts to comply with
     all applicable  rules and regulations of the SEC, and make available to its
     security  holders,  within  a  reasonably  practicable  date,  an  earnings
     statement  covering the period of at least twelve (12) months, but not more
     than  eighteen  (18)  months,  beginning  with the  first  month  after the
     effective date of the  registration  statement,  which  earnings  statement
     shall satisfy the provisions of Section 11(a) of the Securities Act.

(d)  With a view to making  available  to the holders  the  benefits of Rule 144
     promulgated  under the  Securities  Act and any other rule or regulation of
     the SEC that may at any time permit a Holder to sell Registrable Securities
     to the public without  registration  or pursuant to a registration  on Form
     S-3,  Acquiror  hereby  covenants  and agrees to: (i) make and keep  public
     information  available,  as those terms are  understood and defined in Rule
     144,  at all times  after the  Closing;  (ii) file with the SEC in a timely
     manner all reports  and other  documents  required  of  Acquiror  under the
     Securities  Act and Exchange Act; and (iii) furnish to any Holder,  as long
     as the Holder owns any Registrable Securities forthwith upon request, (A) a
     written  statement  by Acquiror  that it has  complied  with the  reporting
     requirements  of Rule 144, the Securities  Acts and the Exchange Act, (B) a
     copy of the most recent annual or quarter report of Acquiror,  and (C) such
     other  information  as may be  reasonably  requested  in order to avail any
     Holder of any rule or regulation of the SEC that permits the selling of any
     such Registrable  Securities without  registration or pursuant to such Form
     S-3.

(e)  Indemnification.

     (i)  To the extent  permitted  by law,  Acquiror  will  indemnify  and hold
          harmless each Holder,  any  underwriter  (as defined in the Securities
          Act)  for  such  Holder,  its  officers,  directors,  shareholders  or
          partners  and  each  person,  if any,  who  controls  such  Holder  or
          underwriter within the meaning of the Securities Act or the Securities
          Exchange Act of 1934,  as amended (the  "Exchange  Act"),  against any
          losses,  claims,  damages,  or liabilities (joint or several) to which
          they may become subject under the Securities  Act, the Exchange Act or
          other federal or state law, insofar as such losses,  claims,  damages,
          or  liabilities  (or actions in respect  thereof)  arise out of or are
          based upon any of the  following  statements,  omissions or violations
          (collectively  a  "Violation"):  (A) any untrue  statement  or alleged
          untrue  statement of a material  fact  contained in such  registration
          statement,  including any preliminary  prospectus or final  prospectus
          contained  therein or any amendments or supplements  thereto,  (B) the
          omission or alleged omission to state therein a material fact required
          to be stated therein,  or necessary to make the statements therein not
          misleading,  or (C) any violation or alleged  violation by Acquiror of
          the Securities Act, the Exchange Act, any state  securities law or any
          rule or regulation  promulgated under the Securities Act, the Exchange
          Act or any state  securities  law; and Acquiror  will pay to each such
          Holder,  underwriter or controlling person, as incurred,  any legal or
          other  expenses   reasonably  incurred  by  them  in  connection  with
          investigating or defending any such loss, claim, damage, or liability,
          or action;  provided,  however, that the indemnity agreement contained
          in  this  Section  6.13(e)(i)  shall  not  apply  to  amounts  paid in
          settlement  of any such  loss,  claim,  liability,  or  action if such
          settlement is effected  without the consent of Acquiror (which consent
          shall not be unreasonably  withheld),  nor shall Acquiror be liable in
          any such case for any such loss, claim, damage,  liability,  or action
          to the extent that it arises out of or is based upon a Violation which
          occurs in reliance  upon and in  conformity  with written  information
          furnished  expressly for use in connection  with such  registration by
          any such Holder, underwriter or controlling person.

     (ii) To the extent permitted by law, each selling Holder will indemnify and
          hold harmless  Acquiror,  each of its directors,  each of its officers
          who has signed the registration  statement,  each person,  if any, who
          controls  Acquiror  within the  meaning  of the  Securities  Act,  any
          underwriter,  any other Holder selling securities in such registration
          statement and any controlling  person of any such underwriter or other
          Holder, against any losses, claims,  damages, or liabilities (joint or
          several) to which any of the  foregoing  persons  may become  subject,
          under the  Securities  Act, the Exchange Act or other federal or state
          law,  insofar as such losses,  claims,  damages,  or  liabilities  (or
          actions  in  respect  thereto)  arise  out of or are  based  upon  any
          Violation,  in each case to the extent (and only to the  extent)  that
          such Violation  occurs in reliance upon and in conformity with written
          information  furnished by such Holder  expressly for use in connection
          with such  registration;  and each such Holder will pay, as  incurred,
          any legal or other expenses reasonably incurred by any person intended
          to  be  indemnified  pursuant  to  this  subsection  6.13(e)(ii),   in
          connection  with  investigating  or  defending  any such loss,  claim,
          damage,  liability, or action;  provided,  however, that the indemnity
          agreement contained in this subsection  6.13(e)(ii) shall not apply to
          amounts paid in settlement of any such loss, claim, damage, liability,
          or action if such  settlement  is effected  without the consent of the
          Holder,  which consent shall not be unreasonably  withheld;  provided,
          that,  in  no  event  shall  any  indemnity   under  this   subsection
          6.13(e)(ii) exceed the net proceeds from the offering received by such
          Holder, except in the case of willful fraud by such Holder.

     (iii)Promptly  after  receipt by an  indemnified  party under this  Section
          6.13(e)  of  notice  of  the  commencement  of any  action  (including
          governmental  action),  such  indemnified  party  will,  if a claim in
          respect  thereof is to be made  against any  indemnifying  party under
          this  Section  6.13(e),  deliver to the  indemnifying  party a written
          notice of the commencement  thereof and the  indemnifying  party shall
          have the right to participate in, and, to the extent the  indemnifying
          party so desires,  jointly with any other indemnifying party similarly
          noticed,   to  assume  the  defense  thereof  with  counsel   mutually
          satisfactory to the parties;  provided,  however,  that an indemnified
          party  (together  with all  other  indemnifying  parties  which may be
          represented  without  conflict by one counsel) shall have the right to
          retain one separate counsel,  with the reasonable fees and expenses to
          be  paid  by  the  indemnifying   party,  if  representation  of  such
          indemnified  party by the counsel retained by the  indemnifying  party
          would be inappropriate due to actual or potential  differing interests
          between such indemnified party and any other party represented by such
          counsel in such  proceeding.  The failure to deliver written notice to
          the indemnifying party within a reasonable time of the commencement of
          any such action,  if prejudicial to its ability to defend such action,
          shall  relieve  such  indemnifying  party  of  any  liability  to  the
          indemnified  party under this Section 6.13(e),  but the omission so to
          deliver written notice to the  indemnifying  party will not relieve it
          of any liability that it may have to any  indemnified  party otherwise
          than under this Section 6.13(e).  No indemnifying party, in defense of
          any such claim or litigation,  shall,  except with the consent of each
          indemnified party,  consent to the entry of any judgment of enter into
          any settlement which does not include as an unconditional term thereof
          the giving by the claimant or plaintiff to the indemnified  party of a
          release from all liability in respect of such claim or litigation.

     (iv) If the indemnification provided for in this Section 6.13(e) is held by
          a court of competent  jurisdiction to be unavailable to an indemnified
          party with respect to any loss,  liability,  claim, damage, or expense
          referred  to  therein,   then  the  indemnifying  party,  in  lieu  of
          indemnifying such indemnified party hereunder, shall contribute to the
          amount paid or payable by such  indemnified  party as a result of such
          loss,  liability,  claim,  damage, or expense in such proportion as is
          appropriate to reflect the relative fault of the indemnifying party on
          the one hand and of the  indemnified  party on the other in connection
          with  the   statements  or  omissions  that  resulted  in  such  loss,
          liability,  claim,  damage,  or expense as well as any other  relevant
          equitable  considerations;  provided,  that,  in no  event  shall  any
          contribution by a Holder under this subsection  6.13(e)(iv) exceed the
          net proceeds from the offering received by such Holder,  except in the
          case of  willful  fraud  by such  Holder.  The  relative  fault of the
          indemnifying party and of the indemnified party shall be determined by
          reference to, among other things, whether the untrue or alleged untrue
          statement of a material  fact or the omission to state a material fact
          relates to information  supplied by the  indemnifying  party or by the
          indemnified party and the parties' relative intent, knowledge,  access
          to  information,  and opportunity to correct or prevent such statement
          or omission.

     (v)  The  obligation  of Acquiror and Holders  under this  Section  6.13(e)
          shall survive the completion of any offering of Registrable Securities
          in a registration statement under this Section 6.13(e) and otherwise.

(f)  If any Holder shall propose to sell any Registrable  Securities pursuant to
     the registration statement, it shall notify Acquiror of its intent to do so
     at least three (3) full trading days prior to such sale,  and the provision
     of such notice to Acquiror  shall  conclusively  be deemed to  establish an
     agreement by such Holder to comply with the registration  provisions herein
     described.  Unless otherwise specified in such notice, such notice shall be
     deemed to  constitute  a  representation  that any  information  previously
     supplied by such Holder is accurate as of the date of such notice.

(g)  Subject to Section  6.13(h),  when a Holder is  entitled  to sell and gives
     notice  of its  intent  to sell  pursuant  to the  registration  statement,
     Acquiror shall use  commercially  reasonable  efforts to furnish within one
     (1) trading day (and shall in any event  furnish  within  three (3) trading
     days) after receipt of such notice to such Holder confirmation that no such
     supplement  or amendment is required or a reasonable  number of copies of a
     supplement  to or an  amendment of such  prospectus  as may be necessary so
     that,  as  thereafter  delivered  to  the  Holders  of  such  shares,  such
     prospectus shall not include an untrue statement of a material fact or omit
     to state a material fact required to be stated therein or necessary to make
     the  statements  therein not  misleading  or incomplete in the light of the
     circumstances  then  existing.  The  failure of  Acquiror  to deliver  such
     confirmation  or a  reasonable  number  of  copies  of such  supplement  or
     amendment  within  such  three (3)  trading  day  period  shall  constitute
     confirmation of Acquiror that no such supplement or amendment is required.

(h)  If at any time after a registration  statement becomes effective,  Acquiror
     advises  the  Holders  in writing  that the  registration  statement  shall
     contain  any  untrue  statement  of a  material  fact or omit to state  any
     material  fact  required  to be stated  therein  or  necessary  to make the
     statements therein not misleading,  or any prospectus  comprising a part of
     such  registration  statement  shall  contain  any  untrue  statement  of a
     material  fact or omit to state any  material  fact  required  to be stated
     therein  or  necessary  to make  the  statements  therein,  in light of the
     circumstances  under which they were made, not misleading or the occurrence
     or existence of any pending  corporate  development  that,in the reasonable
     discretion of Acquiror, makes it appropriate to suspend the availability of
     the registration statement and the related prospectus,  Acquiror shall give
     notice to the Holders that the availability of the  registration  statement
     is suspended and the Holders shall suspend any further sale of  Registrable
     Securities  pursuant to the  registration  statement until the Holders have
     been  informed in writing that the  registration  statement  is  available,
     provided that Acquiror may not suspend the availability of the registration
     statement  unless  affiliates of the Acquiror who are subject to Acquiror's
     insider  trading  policies are also  precluded  from trading in  Acquiror's
     Common Stock.  Acquiror  shall be entitled to exercise its right to suspend
     the availability of the  registration  statement for a period exceeding not
     more than sixty (60)  consecutive  days,  or a total of one hundred  twenty
     (120) days within any consecutive  three hundred sixty (360) day period. In
     addition,  each Holder who becomes an employee of Acquiror shall be subject
     to Acquiror's insider trading policy to the extent applicable.

     (i)  The registration  rights provided in this Section 6.13 shall terminate
          with  respect to a  particular  Holder if the  Registrable  Securities
          owned by such Holder have been held for the necessary  holding  period
          under Rule 144 and all shares of Registrable  Securities  held by such
          Holder may be sold pursuant to Rule 144 in any three (3) month period.
          Upon the termination of  registration  rights pursuant to this Section
          6.13,  Acquiror  shall  have the right to  withdraw  the  registration
          statement, or any portion thereof, covering the Registrable Securities
          held by such particular Holder.

6.14     Tax Characterization.

(a)  The Target Stockholders hereby represent that ISI has at all times from and
     after its formation  constituted a "qualified  subchapter S subsidiary"  as
     such  term is  defined  in Code  Section  1361(b)(3)(B)  ("QSSS")  and will
     continue  to so  constitute  a  qualified  subchapter  S  subsidiary  until
     immediately  prior  to the  closing.  The  Target  Stockholders  agree  and
     acknowledge  that Acquiror may make an election under Code Section 338 with
     respect to New ISI (as defined in subparagraph  (b) below) and that damages
     resulting  from a breach of the  representation  set forth in the preceding
     sentence shall  include,  among other things,  any Tax liability  resulting
     from  such  Section  338  election,  to the  extent  in  excess  of the Tax
     liability  that would have resulted from such election had ISI at all times
     after  its  formation  constituted  a QSSS  as  provided  in the  preceding
     sentence.  In addition,  Acquiror and Target Stockholders each hereby agree
     that, at the election of either Acquiror or Target Stockholders made at any
     time prior to the Closing,  Target Stockholders shall cause ISI to transfer
     all of its assets,  subject to its liabilities,  to Acquiror or its assigns
     (by means of a direct asset  transfer)  at the Closing  (the "Actual  Asset
     Transfer")  in lieu of  transferring  the stock of ISI at the Closing.  Any
     sales, use or similar transfer taxes incurred by reason of the Actual Asset
     Transfer shall be borne equally by ISI and the Target Stockholders,  on the
     one hand, and Acquiror on the other hand.

(b)  Unless either the Target Stockholders or the Acquiror shall have elected an
     Actual Asset Transfer pursuant to the preceding  paragraph (a), for federal
     income tax purposes,  and for the purposes of any state tax regime that has
     a  provision  that  corresponds  to Code  Section  1361(b)(3),  the  Target
     Stockholders  agree to treat the  transfer of the stock of ISI  pursuant to
     this  Agreement as  consisting of the following  components:  (i) First,  a
     fully taxable  transfer  (i.e., a transfer that does not qualify under Code
     Section 351 and does not  constitute  a  reorganization  under Code Section
     368) of the assets and  liabilities  of ISI directly from DRG Holdings to a
     newly-formed  corporation  ("New ISI") (the "Deemed Asset  Transfer"),  and
     (ii) immediately  thereafter,  a fully taxable transfer of the stock of New
     ISI to Acquiror in exchange  for the  consideration  to be delivered to DRG
     Holdings as set forth in Section 1.2 and  Schedule  1.2 hereof.  The Target
     Stockholders  hereby  agree to pay or cause to be paid all Taxes  resulting
     from the deemed  transfers  described  in the  preceding  sentence.  To the
     maximum extent  permissible,  the Target  Stockholders agree not to include
     New ISI as a member of any affiliated,  consolidated,  combined, or unitary
     group for Tax  purposes.  The Target  Stockholders  hereby  represent  that
     except as set forth on Schedule  6.14 hereto,  ISI has not taken any action
     from and after the formation of ISI which would cause it to be treated as a
     separate  entity  (i.e.,  as  other  than a  disregarded  QSSS)  in any Tax
     jurisdiction for purposes of income or franchise taxes.

(c)  Acquiror shall provide a schedule (the "Allocation Schedule") to the Target
     Shareholders within a reasonable time after the Closing Date setting forth,
     in  accordance  with  Section  1060  of the  Code,  the  allocation  of the
     consideration  received  by the Target  Stockholders  in  exchange  for the
     assets  deemed  transferred  in  the  Deemed  Asset  Transfer  or by ISI in
     exchange for the assets actually  transferred in the Actual Asset Transfer,
     if any. If after reviewing the Allocation Schedule, the Target Stockholders
     reasonably  object  to the  allocation  of any  item,  it shall  so  notify
     Acquiror  within a reasonable  time after  delivery to it of the Allocation
     Schedule, and if Acquiror and the Target Stockholders are thereafter unable
     to agree upon the amount of the disputed item, they shall refer the dispute
     to an  independent  certified  public  accounting  firm mutually  chosen by
     Acquiror and Target  Stockholders  for resolution of such item. The parties
     hereto agree that all financial  reports,  and income and other tax returns
     and information reports,  will be prepared and filed in a manner consistent
     with the  allocation  set forth in the  Allocation  Schedule as such may be
     modified by the independent certified public accountants referred to in the
     preceding sentence and no party hereto will take any position  inconsistent
     with such  allocation in any subsequent  returns or  proceedings.  Acquiror
     agrees either to file (in the case of an Actual Asset Transfer) or to cause
     New ISI to file (in the case of a Deemed Asset Transfer),  and DRG Holdings
     agrees  to file (in the case of a Deemed  Asset  Transfer)  or cause ISI to
     file (in the case of an Actual  Asset  Transfer),  IRS Form  8594,  and any
     corresponding  state tax forms, on a timely basis, with a copy to the other
     party.

(d)  Acquiror  agrees that except as  specifically  set forth in this Agreement,
     Acquiror  will not cause  either  Company to take any action on the Closing
     Date otherthan in the ordinary course of business. Acquiror agrees that the
     payments  required by Section 6.9 and any other bonus  payments made by DRG
     Holdings or ISI on the Closing Date shall, for purposes of any jurisdiction
     that treats ISI as a QSSS (or any state taxing jurisdiction equivalent), be
     treated as made by DRG Holdings rather than by New ISI or Acquiror.

(e)  If any party elects to cause an Actual Asset  Transfer  pursuant to Section
     6.14(a),  Target and Target  Stockholders  agree to make all changes to the
     Transaction  Documents and to take all actions reasonably  requested by the
     requesting  party to allow  Acquiror  to effect the Actual  Asset  Transfer
     without adversely affecting Acquiror's or Target Stockholders' rights under
     the Transaction Documents.  Without limiting the foregoing,  (i) Target and
     Target  Stockholders  will take all  actions  reasonably  requested  by the
     requesting  party to  minimize  all sales,  use or similar  transfer  taxes
     payable in  connection  with the Actual Asset  Transfer,  (ii) the parties'
     obligation to consummate  the Actual Asset  Transfer  shall be  conditioned
     upon  Target  obtaining  all third  party  consents  required to effect the
     transfer to Acquiror of the  contracts of Target set forth on Schedule 2.26
     hereto,  and (iii)  Target  shall  execute all  documents  and  instruments
     reasonably  necessary to effect the transfer of the assets  pursuant to the
     Actual Asset  Transfer  subject to Acquiror  executing  all  documents  and
     instruments  reasonably  necessary to effect the  assumption of liabilities
     pursuant to the Actual Asset Transfer.

6.15     Intracompany Account.

(a)  The term  "Intracompany  Account" on a given date shall mean ISI's accounts
     payable to DRG  Holdings as of the close of business on the day before such
     date, but only to the extent such accounts payable  represent cash payments
     by DRG Holdings on behalf of ISI, less ISI's accounts  receivable  from DRG
     Holdings as of the close of business on the day before such date,  but only
     to the extent such accounts receivable represent sales of ISI's products by
     PDC Solutions, Inc., a wholly owned subsidiary of DRG Holdings ("PDC"). The
     term  "Nonqualifying  Accounts"  with respect to the  Intracompany  Account
     shall mean accounts payable that Acquiror  determines do not represent cash
     payments  by DRG  Holdings  on behalf of ISI or  accounts  receivable  that
     Acquiror  determines  do not represent  sales of ISI's  products by PDC, in
     each case based upon reasonable review procedures performed by Acquiror. As
     of  December  31,  1998,  the  parties   acknowledge   that  the  unaudited
     Intracompany  Account,  after consultation  between Target and Acquiror and
     review by Acquiror's independent accountants, was $4,928,967, provided that
     such  acknowledgement  shall not affect the right of Acquiror to  determine
     pursuant  to Section  6.15(b)  that any  accounts  receivable  or  accounts
     payable  included in such  amount are  Nonqualifying  Accounts  (as defined
     below).

(b)  Within two (2) business  days after the Closing  Date,  DRG Holdings  shall
     furnish  to  Acquiror a  statement  of its  Intracompany  Account as of the
     Closing Date together with any related supporting  documentation reasonably
     available to DRG Holdings. Within eight (8) business days after the date on
     which the DRG Holdings  furnishes to Acquiror such  statement and any other
     supporting detail reasonably requested by Acquiror,  Acquiror shall furnish
     to DRG Holdings a statement indicating any Nonqualifying Accounts and shall
     pay to DRG Holdings cash equal to the Intracompany Account, after excluding
     any  Nonqualifying  Accounts,  minus the advance  paid  pursuant to Section
     6.15(d).

(c)  Unless DRG Holdings objects to such statement within five (5) business days
     after its receipt, Acquiror's determination of Nonqualifying Accounts shall
     be final.  If DRG  Holdings  objects  to  Acquiror's  determination  of any
     Nonqualifying  Accounts within such five (5) day period,  the determination
     of  any  Nonqualifying  Accounts  shall  be  submitted  to  arbitration  in
     accordance  with  procedures  set forth in Section 9.8. In  resolving  such
     dispute,  the  arbitrator  shall  use  the  review  procedures  used by the
     Acquiror, unless the arbitrator determines that such review procedures were
     not reasonable,  in which case the arbitrator shall be free to use whatever
     review procedures it deems appropriate. Within ten (10) business days after
     the  arbitrator  determines  the  amount  of  any  Nonqualifying  Accounts,
     Acquiror  shall  pay DRG  Holdings  cash  equal  to (i) the  amount  of the
     Intracompany  Account,  excluding any Nonqualifying  Accounts determined by
     the  arbitration,  minus (ii) the amount paid to DRG  Holdings  pursuant to
     Section 6.15(b) and the advance paid pursuant to Section 6.15(d).

(d)  Acquiror shall pay DRG Holdings Two Million Five Hundred  Thousand  Dollars
     ($2,500,000)  in cash,  by wire  transfer,  at the  Closing  as an  advance
     against the amount due pursuant to Section 6.15(b) or (c).

6.16 Acquiror Option Grants.  Acquiror has obtained the approval of its Board of
Directors to grant options to purchase up to 300,000 shares of Acquiror's Common
Stock  to  employees  of  Target  who  become   employees  of  Acquiror  or  its
subsidiaries, provided that the actual number of such shares shall be determined
by  Acquiror  in its  sole  discretion.  Any  such  option  grants  shall  be in
accordance  with  Acquiror's  standard  policies  for  option  grants  and shall
provide,  among other things,  for an exercise price of Acquiror's  Common Stock
equal to the fair  market  value of such  stock on the date of grant  and  other
customary  vesting  conditions and  restrictions.  Acquiror agrees that it shall
consult with George Wilson  regarding any option grants pursuant to this Section
6.16.  Acquiror  shall use  commercially  reasonable  efforts to effect any such
option grants as of the Closing Date.

6.17 Transfer of Assets. On or before the Closing Date, the Target  Stockholders
shall upon the  request  of  Acquiror  received  by the Target at least five (5)
business   days   before  the  Closing   Date,   cause   Intelliguard   Software
International,  Inc. ("Intelliguard  International") to assign to ISI all assets
of  Intelliguard  International  (including  contracts)  that are  necessary  or
reasonably  useful in ISI's  business.  The  Acquiror  shall be entitled but not
obliged to offer  contracts  of  employment  to any  employees  of  Intelliguard
International  based in the U.K. The parties hereby  acknowledge  and agree that
the transfer of any assets  currently  owned by the U.K.  branch of Intelliguard
International  pursuant to this  Section 6.17 does not amount to the transfer of
an undertaking  for the purpose of The Transfer of  Undertakings  (Protection of
Employment)  Regulations  1981 and any subsequent  re-enactment  or modification
thereof.

6.18 Name Change. The Target Stockholders shall cause Intelliguard International
and the affiliates of Intelliguard  International and the Target Stockholders to
cease using the name  "Intelliguard  Software  International" or any confusingly
similar name.


                                   ARTICLE VII

                          CONDITIONS TO THE ACQUISITION

7.1  Conditions to  Obligations  of Each Party to Effect the  Acquisition.  The
respective  obligations of each party to this Agreement to consummate and effect
this Agreement and the transactions  contemplated hereby shall be subject to the
satisfaction  at or  prior  to  the  Closing  Date  of  each  of  the  following
conditions,  any of which may be waived,  in writing,  by  agreement  of all the
parties hereto:

(a)  No Injunctions or Restraints;  Illegality.  No temporary restraining order,
     preliminary  or permanent  injunction or other order issued by any court of
     competent   jurisdiction   or  other  legal  or  regulatory   restraint  or
     prohibition  preventing the  consummation  of the  Acquisition  shall be in
     effect,  nor shall any proceeding  brought by an  administrative  agency or
     commission or other governmental authority or instrumentality,  domestic or
     foreign,  seeking any of the  foregoing be pending;  nor shall there be any
     action taken, or any statute,  rule, regulation or order enacted,  entered,
     enforced  or  deemed  applicable  to  the  Acquisition,   which  makes  the
     consummation of the Acquisition illegal or otherwise prohibits consummation
     of the  transactions  contemplated  hereby.  In the event an  injunction or
     other order shall have been issued, each party agrees to use its reasonable
     diligent efforts to have such injunction or other order lifted.

(b)  Governmental   Approval.   Acquiror   and  Target   and  their   respective
     subsidiaries  shall have timely obtained from each Governmental  Entity all
     approvals,  waivers and consents,  if any, necessary for consummation of or
     in  connection   with  the   Acquisition   and  the  several   transactions
     contemplated hereby, including such approvals,  waivers and consents as may
     be required under the Securities  Act, under state Blue Sky laws, and under
     HSR.

7.2 Additional Conditions to Obligations of Target and Target Stockholders. The
obligations  of Target and Target  Stockholders  to  consummate  and effect this
Agreement  and the  transactions  contemplated  hereby  shall be  subject to the
satisfaction  at or  prior  to  the  Closing  Date  of  each  of  the  following
conditions,  any of which  may be  waived,  in  writing,  by Target  and  Target
Stockholders:

(a)  Representations,  Warranties  and  Covenants.  Except as  disclosed  in the
     Acquiror  Disclosure  Letter,  (i) the  representations  and  warranties of
     Acquiror  in this  Agreement  shall be true  and  correct  in all  material
     respects (except for such representations and warranties that are qualified
     by their terms by a reference  to  materiality  which  representations  and
     warranties as so qualified  shall be true in all respects) on and as of the
     Closing Date as though such representations and warranties were made on and
     as of such time and (ii) Acquiror  shall have performed and complied in all
     material  respects with all covenants,  obligations  and conditions of this
     Agreement  required to be  performed  and  complied  with by them as of the
     Closing Date.

(b)  Certificate of Acquiror. Target shall have been provided with a certificate
     executed  on behalf of Acquiror by its  President  and its Chief  Financial
     Officer to the effect that, as of the Closing Date:

     (i)  all  representations  and  warranties  made  by  Acquiror  under  this
          Agreement are true and complete in all material respects; and

     (ii) all  covenants,  obligations  and  conditions of this  Agreement to be
          performed by Acquiror on or before such date have been so performed in
          all material respects.

(c)  No Material  Adverse  Changes.  There shall not have  occurred any Material
     Adverse  Effect with respect to Acquiror and its  subsidiaries,  taken as a
     whole.

7.3 Additional  Conditions to the  Obligations of Acquiror.  The obligations of
Acquiror  to  consummate  and  effect  this   Agreement  and  the   transactions
contemplated  hereby  shall be  subject to the  satisfaction  at or prior to the
Closing Date of each of the following conditions, any of which may be waived, in
writing, by Acquiror:

(a)  Representations,  Warranties  and  Covenants.  Except as  disclosed  in the
     Target Disclosure Letter (i) The  representations  and warranties of Target
     and Target  Stockholders in this Agreement shall be true and correct in all
     material respects (except for such  representations and warranties that are
     qualified   by  their   terms  by  a   reference   to   materiality   which
     representations  and  warranties  as so  qualified  shall  be  true  in all
     respects) on and as of the Closing Date as though such  representations and
     warranties  were made on and as of such  time and (ii)  Target  and  Target
     Stockholders  shall have  performed  and complied in all material  respects
     with all covenants,  obligations and conditions of this Agreement  required
     to be performed and complied with by it as of the Closing Date.

(b)  Certificate of Target. Acquiror shall have been provided with a certificate
     executed on behalf of Target by its President and Chief  Financial  Officer
     and by Target Stockholders to the effect that, as of the Closing Date:

     (i)  all   representations   and  warranties  made  by  Target  and  Target
          Stockholders  under  this  Agreement  are  true  and  complete  in all
          material respects; and

     (ii) all  covenants,  obligations  and  conditions of this  Agreement to be
          performed  by Target and Target  Stockholders  on or before  such date
          have been so performed in all material respects.

(c)  Third Party  Consents.  Acquiror  shall have been  furnished  with evidence
     satisfactory  to it of the  consent  or  approval  of those  persons  whose
     consent or approval  shall be required in connection  with the  Acquisition
     under the contracts of Target set forth on Schedule 2.26 hereto.

(d)  Injunctions  or  Restraints  on  Acquisition  and Conduct of  Business.  No
     temporary  restraining order,  preliminary or permanent injunction or other
     order  issued  by any court of  competent  jurisdiction  or other  legal or
     regulatory  restraint provision limiting or restricting  Acquiror's conduct
     or operation of the business of Target and its subsidiaries,  following the
     Acquisition  shall be in  effect,  nor shall any  proceeding  brought by an
     administrative agency or commission or other Governmental Entity,  domestic
     or foreign, seeking the foregoing be pending.

(e)  No Material  Adverse  Changes.  There shall not have  occurred any Material
     Adverse  Effect  with  respect to Target and its  subsidiaries,  taken as a
     whole.

(f)  Resignation  of  Directors.  The officers and directors of Target in office
     immediately  prior to the Closing Date shall have  resigned as directors of
     Target effective as of the Closing Date.

(g)  Employment and Non-Competition  Agreements. The employees of Target and its
     subsidiaries   set  forth  on  Schedule  7.3(g)  shall  have  entered  into
     Employment  and  Non-Competition  Agreements in  substantially  the form(s)
     attached hereto as Exhibit C.

(h)  Releases.  Each of the  participants  in the Target  Unit  Plan,  including
     (without  limitation)  the employees of Target and of all  subsidiaries  of
     Target's parent corporation, shall have entered into a release agreement in
     which each individual acknowledges that the cash payment made in accordance
     with Section 6.9 shall  constitute  satisfaction in full of all obligations
     to such individual  under the Target Unit Plan and in which such individual
     waives  any  claims  under the Target  Unit Plan and  covenants  not to sue
     Target or Acquiror under any claim arising out of the individual's interest
     in the Target Unit Plan.

(i)  Transaction  Documents.  Target and each of the Target  Stockholders  shall
     have entered into the  Transaction  Documents to which they are a party and
     the Escrow Agent and Target Stockholders' Agent shall have entered into the
     Escrow Agreement.


                                  ARTICLE VIII

                   TERMINATION, EXPENSES, AMENDMENT AND WAIVER

8.1 Termination. At any time prior to the Closing Date, whether before or after
approval of the matters  presented in  connection  with the  Acquisition  by the
Target Stockholders of Target, this Agreement may be terminated:

(a)  by mutual consent duly authorized by the Board of Directors of Acquiror and
     Target;

(b)  by either Acquiror or Target,  if, without fault of the terminating  party,
     the Closing shall not have  occurred on or before April 12, 1999  (provided
     that (i) a later date may be agreed upon in writing by the parties  hereto,
     (ii) the right to terminate this Agreement  under this Section 8.1(b) shall
     not be  available  to any party whose action or failure to act has been the
     cause or resulted in the failure of the  Acquisition  to occur on or before
     such date and such  action or failure to act  constitutes  a breach of this
     Agreement)  and (iii) Acquiror may select a date not later than thirty (30)
     days after  April 12,  1999 if  Acquiror  is in good faith  contesting  and
     resisting any action or proceeding arising under the antitrust laws;

(c)  by  Acquiror,   if  Target  shall  breach  any  representation,   warranty,
     obligation or agreement hereunder and such breach shall not have been cured
     within ten (10)  business  days of  receipt by Target of written  notice of
     such  breach,  provided  that the  right to  terminate  this  Agreement  by
     Acquiror under this Section 8.1(c) shall not be available to Acquiror where
     Acquiror is at that time in willful breach of this Agreement;

(d)  by  Target,  if  Acquiror  shall  breach  any   representation,   warranty,
     obligation or agreement hereunder and such breach shall not have been cured
     within ten (10) days  following  receipt by Acquiror  of written  notice of
     such breach,  provided that the right to terminate this Agreement by Target
     under this Section  8.1(d) shall not be available to Target where Target is
     at that time in material breach of this Agreement;

8.2 Effect of  Termination.  In the event of  termination  of this Agreement as
provided in Section 8.1, this Agreement  shall  forthwith  become void and there
shall be no liability or  obligation  on the part of Acquiror or Target or their
respective officers, directors, Target Stockholders or affiliates, except to the
extent that such termination results from the breach by a party hereto of any of
its  representations,  warranties  or  covenants  set  forth in this  Agreement;
provided  that,  the  provisions of Section 6.3  (Confidentiality),  Section 8.3
(Expenses and Termination  Fees) and this Section 8.2 shall remain in full force
and effect and survive any termination of this Agreement.

8.3  Expenses  and  Termination  Fees.   Whether  or  not  the  Acquisition  is
consummated,  all costs and expenses  incurred in connection with this Agreement
and the transactions  contemplated hereby (including,  without  limitation,  the
fees and expenses of its advisers,  accountants and legal counsel) shall be paid
by the party incurring such expense; provided,  however, that if the Acquisition
is  consummated  (i)  Acquiror  (A) shall pay  (subject  to review by  Acquiror)
out-of-pocket  fees and  expenses  of  Hambrecht  & Quist  LLC  pursuant  to the
engagement  letter described in the Target Disclosure Letter (B) shall pay up to
an aggregate of $425,000 of out-of-pocket fees and expenses of legal counsel and
accountants for the Target  Stockholders and (ii) Target  Stockholders shall pay
any fees and expenses of legal counsel and accountants in excess of $425,000. If
Acquiror or Target  receives any invoices for amounts in excess of said amounts,
it may pay such  fees;  provided,  however,  that  such  payment  shall,  if not
promptly reimbursed by the Target Stockholders at Acquiror's request, constitute
"Damages"  recoverable  under the Escrow Agreement and such Damages shall not be
subject  to  the  Damage   threshold   (as  defined  in  Section  9.4   hereof).
Notwithstanding  any other provision of this Agreement or the Target  Disclosure
Letter,  DRG Holdings shall indemnify  Acquiror for any financial  advisory fees
and expenses other than those payable to Hambrecht & Quist LLC.

8.4 Extension;  Waiver.  At any time prior to the Closing Date any party hereto
may, to the extent legally  allowed,  (i) extend the time for the performance of
any of the obligations or other acts of the other parties hereto, (ii) waive any
inaccuracies in the  representations and warranties made to such party contained
herein or in any document  delivered  pursuant hereto and (iii) waive compliance
with any of the agreements or conditions for the benefit of such party contained
herein.  Any  agreement on the part of a party  hereto to any such  extension or
waiver shall be valid only if set forth in an  instrument  in writing  signed on
behalf of such party.


                                   ARTICLE IX

                           ESCROW AND INDEMNIFICATION

9.1 Survival of Representations,  Warranties and Covenants. Notwithstanding any
investigation  conducted  before or after the Closing Date, and  notwithstanding
any actual or implied  knowledge or notice of any facts or  circumstances  which
Acquiror,   Target  or  Target  Stockholders  may  have  as  a  result  of  such
investigation or otherwise,  Acquiror,  Target and Target  Stockholders  will be
entitled  to  rely  upon  the  other  party's  representations,  warranties  and
covenants set forth in this  Agreement.  The  representations  and warranties of
Acquiror will terminate upon the Closing.  The  obligations of Target and Target
Stockholders with respect to their representations,  warranties,  agreements and
covenants  will  survive the Closing and continue in full force and effect until
the date twelve (12) months following the Closing Date (the "Termination Date"),
at which time,  subject to the third sentence of Section 9.2 and to Section 9.5,
the representations,  warranties and covenants of Target and Target Stockholders
set forth in this  Agreement  (other  than any such Tax  Provisions  (as defined
below))  and any  liability  of the  Target  Stockholders  with  respect to such
representations,  warranties and covenants will terminate.  Any representations,
warranties or covenants of Target or Target Stockholders relating to Tax matters
(including,  without limitation, those contained in Sections 2.15, 6.14 and 5.1)
(collectively,  "Tax  Provisions") and any liability of the Target  Stockholders
with respect  thereto will not terminate  until the expiration of the applicable
statute of limitations  (including any  applicable  extensions)  with respect to
Target or Acquiror to which those Tax Provisions relate.

9.2  Indemnity.  From and after the Closing Date, and subject to the provisions
of Section 9.1, Acquiror (on or after the Closing Date) shall be indemnified and
held harmless by the Target Stockholders against, and reimbursed for, any actual
liability,  damage, loss, obligation,  demand,  judgment, fine, penalty, cost or
expense,  including  reasonable  attorneys' fees and expenses,  and the costs of
investigation incurred in defending against or settling such liability,  damage,
loss,  cost or expense or claim  therefor  and any  amounts  paid in  settlement
thereof, imposed on or reasonably incurred by Acquiror as a result of any breach
of any representation,  warranty, agreement or covenant on the part of Target or
Target Stockholders under this Agreement (collectively the "Damages"). "Damages"
as used herein is not limited to matters  asserted by third parties (see Section
9.12),   but  includes   Damages  incurred  or  sustained  by  Acquiror  or  its
subsidiaries  in the absence of claims by a third party  (including  the loss of
tax benefits by Acquiror or its  subsidiaries  or the reduction in the tax basis
of assets of  Acquiror  or its  subsidiaries).  If the  Closing  occurs,  claims
against the Escrow Fund (as defined  below) in  accordance  with this Article IX
shall be the  exclusive  remedy of Acquiror for breaches of  representation  and
warranties and covenants by Target and Target  Stockholders  in the  Transaction
Documents  (other  than  the Tax  Provisions),  except  to the  extent  any such
breaches  results  from  fraud.  If the  Closing  occurs,  Target  shall have no
obligations to Target Stockholders on or after the Closing Date.

9.3 Escrow  Fund.  As security  for the  indemnity  provided for in Section 9.2
hereof,  Ninety  Thousand  (90,000) shares of the Acquiror Common Stock issuable
pursuant to Section 1.2 shall be deposited by Acquiror in an escrow account with
Greater Bay Trust Company (or other mutually  acceptable  institution) as Escrow
Agent (the "Escrow Agent"), as of the Closing Date, such deposit,  together with
any  distributions  on such Acquiror  Common Stock, to constitute an escrow fund
(the "Escrow  Fund") to be governed by the terms set forth in this Agreement and
the provisions of the Escrow Agreement to be executed and delivered  pursuant to
Section 6.10. The Escrow Fund shall be allocated  among the Target  Stockholders
in  accordance  with the  allocation  set forth on  Schedule  1.2  hereof.  Upon
compliance  with the terms  hereof and the Escrow  Agreement  and subject to the
provisions of this Article IX,  Acquiror  shall be entitled to obtain  indemnity
from the Escrow  Fund for  Damages  covered  by the  indemnity  provided  for in
Section 9.2 of this Agreement.

9.4 Damage Threshold.  Notwithstanding the foregoing,  Acquiror may not receive
any shares from the Escrow Fund unless and until an  Officer's  Certificate  (as
defined in Section 9.6 below) identifying  Damages the aggregate amount of which
exceeds $250,000 (the "Damage Threshold") has been delivered to the Escrow Agent
as provided in Section 9.5 below and such amount is determined  pursuant to this
Article IX to be payable,  in which case Acquiror  shall receive shares equal in
value to the amount of Damages in excess of $250,000.  In determining the amount
of any Damage  attributable to a breach,  any materiality or knowledge  standard
contained  in a  representation,  warranty  or  covenant  of  Acquiror  shall be
disregarded.  Notwithstanding  any other provision  contained herein, the Target
Stockholders  shall be liable for Damages after the Termination Date relating to
a breach of any Tax Provision  only to the extent such Damages  exceed an amount
equal to the Damage  Threshold  less the  aggregate  amount of Damages for which
Acquiror was not indemnified pursuant to the first sentence of this Section 9.4.

9.5 Escrow  Period.  The Escrow  Period shall  terminate at the  expiration  of
twelve (12) months after the Closing Date; provided,  however, that a portion of
the Escrow  Shares,  which are  necessary  to  satisfy  any  unsatisfied  claims
specified in any Officer's Certificate theretofore delivered to the Escrow Agent
prior  to   termination   of  the  Escrow  Period  with  respect  to  facts  and
circumstances existing prior to expiration of the Escrow Period, shall remain in
the Escrow Fund until such claims have been finally resolved.

9.6     Claims.

(a)  Upon  receipt by the Escrow  Agent on or before the  Termination  Date of a
     certificate  signed by the chief  financial or chief  executive  officer of
     Acquiror (an "Officer's Certificate") for a claim against the Escrow Fund:

     (i)  stating  that  Acquiror  has  incurred,  paid or properly  accrued (in
          accordance  with GAAP) or knows of facts  giving rise to a  reasonable
          probability  that it will have to incur,  pay or accrue (in accordance
          with GAAP) Damages in an aggregate stated amount with respect to which
          Acquiror is entitled to payment from the Escrow Fund  pursuant to this
          Agreement; and

     (ii) specifying  in  reasonable  detail  the  individual  items of  Damages
          included  in the  amount  so  stated,  the  date  each  such  item was
          incurred,  paid or properly  accrued (in accordance with GAAP), or the
          basis  for such  anticipated  liability,  the  specific  nature of the
          breach to which such item is related,  the Escrow Agent shall, subject
          to the  provisions  of  Section  9.7 of  this  Agreement,  deliver  to
          Acquiror shares of Acquiror Common Stock or other assets in the Escrow
          Fund in an amount  necessary  to  indemnify  Acquiror  for the Damages
          claimed.  All shares of Acquiror  Common Stock  subject to such claims
          shall  remain in the  Escrow  Fund  until  (A)  Damages  are  actually
          incurred or (B) paid or the Acquiror determines in its reasonable good
          faith judgment that no Damages will be required to be incurred or paid
          (in  which  event  such  shares  shall be  distributed  to the  Target
          Stockholders in accordance  with Section 9.10 below)or  (C)such claims
          have been withdrawn or finally  disallowed against the Escrow Fund (in
          which event such shares shall be distributed to Target Stockholders in
          accordance with Section 9.12 below).

(b)  For the purpose of compensating  Acquiror for its Damages  pursuant to this
     Agreement,  the Acquiror Common Stock in the Escrow Fund shall be valued at
     a per share price equal to the average of the closing bid price for a share
     of Acquiror  Common Stock as quoted on the Nasdaq  National  Market for the
     ten (10) trading days  immediately  preceding and ending on the trading day
     immediately prior to the Closing Date.

(c)  Upon receipt by the Target  Stockholders' Agent on or after the Termination
     Date of an Officer's Certificate for a claim not covered by the Escrow Fund
     relating to a breach of any Tax Provision:

     (i)  stating  that  Acquiror  has  incurred,  paid or properly  accrued (in
          accordance  with GAAP) or knows of facts  giving rise to a  reasonable
          probability  that it will have to incur,  pay or accrue (in accordance
          with GAAP) Damages in an aggregate stated amount with respect to which
          Acquiror is entitled to  indemnification  pursuant to this  Agreement;
          and

     (ii) specifying  in  reasonable  detail  the  individual  items of  Damages
          included  in the  amount  so  stated,  the  date  each  such  item was
          incurred,  paid or properly  accrued (in accordance with GAAP), or the
          basis  for such  anticipated  liability,  the  specific  nature of the
          breach to which such item is related,  the Target  Stockholders shall,
          subject  to the  provisions  of  Section  9.7 of this  Agreement,  pay
          Acquiror an amount in cash  necessary  to  indemnify  Acquiror for the
          Damages claimed within forty-five days after receipt of such Officer's
          Certificate by the Target Stockholders' Agent.

(d)  All  claims  against  the Escrow  Fund that are  allowed  pursuant  to this
     Article IX shall be charged to the  account of each Target  Stockholder  in
     accordance with the allocation set forth on Schedule 1.2 hereof, as amended
     on or before the Closing.  To the extend DRG Holdings  does not satisfy any
     obligations  pursuant to this Article IX (including  any payments  required
     pursuant  to Section  9.6(c)),  or  pursuant to Section 9.8 in respect of a
     claim covered by an Officer's Certificate delivered to Target Stockholders'
     Agent  pursuant to Section  9.6(c),  the other  Target  Stockholders  shall
     satisfy such obligations in accordance with their relative  allocations set
     forth on Schedule 1.2 hereof, as amended on or before the Closing.

9.7     Objections to Claims.

(a)  At the time of delivery of any  Officer's  Certificate  to the Escrow Agent
     pursuant to Section 9.6(a), a duplicate copy of such Officer's  Certificate
     shall be delivered to the Target  Stockholders' Agent (along with a copy of
     any supporting  documents  reasonably  available to Acquiror that relate to
     the  claims  set  forth in the  Officer's  Certificate).  For a  period  of
     forty-five  (45) days after such delivery to the Escrow  Agent,  the Escrow
     Agent shall make no delivery of  Acquiror  Common  Stock or other  property
     pursuant to Section 9.6 hereof  unless the Escrow Agent shall have received
     written  authorization  from the  Target  Stockholders'  Agent to make such
     delivery.  After the  expiration of such  forty-five  (45) day period,  the
     Escrow  Agent shall make  delivery of the  Acquiror  Common  Stock or other
     property in the Escrow Fund in accordance with Section 9.6 hereof, provided
     that no such  payment or delivery  may be made if the Target  Stockholders'
     Agent  shall  object  in a  written  statement  to the  claim  made  in the
     Officer's Certificate,  and such statement shall have been delivered to the
     Escrow Agent and to Acquiror  prior to the  expiration  of such  forty-five
     (45) day period.

(b)  At  the  time  of  delivery  of any  Officer's  Certificate  to the  Target
     Stockholders'  Agent pursuant to Section  9.6(c),  a copy of any supporting
     documents  reasonably  available to Acquiror  that relate to the claims set
     forth in the  Officer's  Certificate  shall  also be  delivered  to  Target
     Stockholders'  Agent.  Forty-five  (45) days after such  delivery,  payment
     shall be made by the Target Stockholders  pursuant to Section 9.6(c) unless
     the Target  Stockholders'  Agent shall object in a written statement to the
     claim made in the Officer's Certificate, and such statement shall have been
     delivered  to the Acquiror  within  forty-five  days after  receipt of such
     Officer's Certificate by the Target Stockholders' Agent.

9.8     Resolution of Conflicts; Arbitration.

(a)  In case the Target  Stockholders' Agent shall so object in writing pursuant
     to Section  9.7 to any claim or claims by  Acquiror  made in any  Officer's
     Certificate  delivered  pursuant  to  Section  9.6(a)  or (c),  the  Target
     Stockholders' Agent and Acquiror shall attempt in good faith for sixty (60)
     days to agree upon the rights of the  respective  parties  with  respect to
     each of such claims. If the Target  Stockholders' Agent and Acquiror should
     so agree, a memorandum  setting forth such agreement  shall be prepared and
     signed by both  parties and shall be  furnished  to the Escrow  Agent.  The
     Escrow  Agent shall be entitled  to rely on any such  memorandum  and shall
     distribute the Acquiror Common Stock or other property from the Escrow Fund
     in accordance with the terms thereof.

(b)  If the parties  have not  resolved  the dispute  during such sixty (60) day
     period  then  within an  additional  ten (10) day period the  parties  will
     mutually  agree on and  appoint a single  arbitrator  in Santa Clara or San
     Mateo  County,  California  who is  familiar  with  the  computer  software
     industry  and  software  licensing  issues  (or, in  connection  with a tax
     dispute,  who has  expertise in tax matters).  If the parties  cannot agree
     upon a  single  arbitrator,  then  such an  arbitrator  shall  be  selected
     pursuant to the rules of the AAA (American Arbitration  Association).  Upon
     such  appointment  the parties will each deliver to the  arbitrator  and to
     each other a written proposal of that party's final recommended  resolution
     to the  dispute  (the  "Proposal"),  along with all  written  arguments  or
     documentation supporting the adoption of such recommended resolution.  This
     will be the final  proposal  each party can make  concerning  the  dispute.
     Within sixty (60) days of the  appointment  of such  arbitrator,  under the
     rules of the American  Arbitration  Association and the law of the State of
     California  (exclusive of that body of law dealing with choice of law), the
     arbitrator  shall adopt one of the  Proposals  as his or her final  binding
     decision and award (the  "Award").  Any judgment upon the Award rendered by
     the  Arbitrator  may be entered in any court having  jurisdiction  over the
     subject matter  thereof.  The arbitrator  shall have the authority to grant
     any  equitable  and legal  remedies that would be available in any judicial
     proceeding instituted to resolve the dispute.

(c)  The  arbitrator  may  request  reasonable  written   clarification  of  the
     documents  previously provided for his review during the 30 days after such
     appointment.  Any  material  provided  to  the  arbitrator  shall  also  be
     simultaneously  provided to the opposing party.  The opposing party will be
     entitled,  during the five days  following  delivery of such  material,  to
     provide a written  response or rebuttal to same to the  arbitrator  and the
     other party.

(d)  Any such  arbitration  shall be conducted  before a single  arbitrator  who
     shall be compensated  for his or her services at a rate to be determined by
     the  parties  or by the  American  Arbitration  Association  but based upon
     reasonably  hourly or daily consulting rate for the arbitrator in the event
     the parties are not able to agree upon his or her rate of compensation.

(e)  The arbitrator may award either party its costs and attorneys fees. Pending
     such award,  however,  the fees of the arbitrator will be shared equally by
     the parties and each party will bear its own costs and attorneys fees.

(f)  Upon conclusion of any arbitration  proceedings  hereunder,  the arbitrator
     shall render  findings of fact and conclusions of law and a written opinion
     setting  forth the basis and  reasons  for any  decision  reached and shall
     deliver such documents to each party to this Agreement  along with a signed
     copy of the Award.

9.9     Target Stockholders' Agent.

(a)  Ed Lacey shall be  constituted  and  appointed as the Target  Stockholders'
     Agent for and on  behalf of the  Target  Stockholders  to give and  receive
     notices  and  communications,  to  authorize  delivery  to  Acquiror of the
     Acquiror  Common  Stock or other  property  from  the  Escrow  Fund or cash
     payments  from  the  Target  Stockholders  in  satisfaction  of  claims  by
     Acquiror, to object to such deliveries, to agree to, negotiate,  enter into
     settlements  and  compromises  of, and demand  arbitration  and comply with
     orders of courts and awards of arbitrators with respect to such claims, and
     to take all actions  necessary or appropriate in the judgment of the Target
     Stockholders'  Agent for the  accomplishment of the foregoing.  Such agency
     may be changed by the  holders of a majority in interest of the Escrow Fund
     from  time to time  upon not less  than 10 days'  prior  written  notice to
     Acquiror.  The Target  Stockholders' Agent may resign upon thirty (30) days
     notice to the parties to this  Agreement  and the Target  Stockholders.  No
     bond shall be required of the Target  Stockholders'  Agent,  and the Target
     Stockholders' Agent shall receive no compensation for his services. Notices
     or  communications  to  or  from  the  Target   Stockholders'  Agent  shall
     constitute notice to or from each of the Target Stockholders.

(b)  The  Target  Stockholders'  Agent  shall not be liable  for any act done or
     omitted hereunder as Target  Stockholders' Agent while acting in good faith
     and in the  exercise of  reasonable  judgment,  and any act done or omitted
     pursuant to the advice of counsel shall be conclusive evidence of such good
     faith.  The  Target  Stockholders  shall  severally  indemnify  the  Target
     Stockholders'  Agent and hold him harmless  against any loss,  liability or
     expense  incurred  without gross negligence or bad faith on the part of the
     Target  Stockholders'  Agent and arising out of or in  connection  with the
     acceptance  or  administration   of  his  duties   hereunder.   The  Target
     Stockholders shall be entitled to a distribution from the Escrow Fund equal
     to any  such  indemnity  claim  which  has not  been  satisfied;  provided,
     however,  that a portion  of the  Escrow  Shares,  which are  necessary  to
     satisfy any  unsatisfied  claims  specified  in any  Officer's  Certificate
     theretofore  delivered  to the Escrow Agent prior to the  Termination  Date
     with respect to facts and circumstances existing prior to expiration of the
     Escrow Period,  shall remain in the Escrow Fund until such claims have been
     finally resolved.

(c)  The Target  Stockholders' Agent shall have reasonable access to information
     about  Target  and the  reasonable  assistance  of  Target's  officers  and
     employees for purposes of performing  its duties and  exercising its rights
     hereunder,  provided  that  the  Target  Stockholders'  Agent  shall  treat
     confidentially  and not disclose any  nonpublic  information  from or about
     Target to anyone (except on a need to know basis to  individuals  who agree
     to treat such information confidentially).

9.10  Distribution  Upon Termination of Escrow Period.  Within five (5) business
days  following  the  Termination  Date,  the Escrow Agent shall  deliver to the
Former Target  Stockholders  all of the Acquiror Common Stock in the Escrow Fund
in excess of any amount of such Acquiror  Common Stock  reasonably  necessary to
satisfy  any  unsatisfied  or  disputed  claims  for  Damages  specified  in any
Officer's Certificate delivered to the Escrow Agent on or before the Termination
Date and any  unsatisfied or disputed claims by the Target  Stockholders'  Agent
under  Section  9.9. As soon as all such claims have been  resolved,  the Escrow
Agent  shall  deliver to the  Target  Stockholders  all  Acquiror  Common  Stock
remaining in the Escrow Fund and not required to satisfy such claims. Deliveries
of Acquiror  Common  Stock to the Target  Stockholders  pursuant to this section
shall be made in proportion to the allocation set forth in Section 9.3.

9.11 Actions of the Target  Stockholders'  Agent.  A decision,  act,  consent or
instruction of the Target Stockholders' Agent shall constitute a decision of all
Target  Stockholders for whom shares of Acquiror Common Stock otherwise issuable
to them are  deposited  in the  Escrow  Fund and  shall be  final,  binding  and
conclusive upon each such Target Stockholder,  and the Escrow Agent and Acquiror
may  rely  upon  any  decision,  act,  consent  or  instruction  of  the  Target
Stockholders'  Agent as being the decision,  act, consent or instruction of each
and every such Target  Stockholder.  The Escrow  Agent and  Acquiror  are hereby
relieved  from  any  liability  to any  person  for  any  acts  done  by them in
accordance  with such  decision,  act,  consent  or  instruction  of the  Target
Stockholders' Agent.

9.12  Third-Party  Claims.  In the event Acquiror becomes aware of a third-party
claim which Acquiror  believes may result in a demand against the Escrow Fund or
against the Target  Stockholders  after the  Termination  Date,  Acquiror  shall
notify  the  Target   Stockholders'   Agent  of  such  claim,   and  the  Target
Stockholders'  Agent shall be entitled,  at his expense,  to  participate in any
defense of such claim.  Acquiror shall have the right in its sole  discretion to
settle any such  claim;  provided,  however,  that  Acquiror  may not effect the
settlement  of any such claim  without the  consent of the Target  Stockholders'
Agent, which consent shall not be unreasonably  withheld.  In the event that the
Target  Stockholders'  Agent has  consented to any such  settlement,  the Target
Stockholders' Agent before the Termination Date shall have no power or authority
to object  under  Section 9.6 or any other  provision  of this Article IX to the
amount of any claim by  Acquiror  against  the Escrow  Fund for  indemnity  with
respect to such settlement.

9.13 Additional  Indemnification.  For purposes of this Section 9.13, the phrase
(i) "Floor  Amount"  shall mean a dollar  amount equal to the product of 15% and
the amount that  Acquiror  treats as the purchase  price of the stock of ISI for
purposes of its financial  statements as prepared in accordance  with GAAP, (ii)
"In Process R&D Amount"  shall mean the dollar  amount of the purchase  price of
the  stock  of  ISI  that  Acquiror   allocates  to  "in  process  research  and
development"  and therefore  expenses  immediately for purposes of its financial
statements  prepared in accordance with GAAP, (iii) "Excess Amount" shall mean a
dollar  amount equal to the excess,  if any, of (A) the lesser of the In Process
R&D Amount or the Final Determination  Ordinary Income Amount over (B) the Floor
Amount,  (iv)  "Reported  Ordinary  Income Amount" shall mean the amount of gain
that does not constitute long term capital gain that DRG Holdings reports on its
federal  income tax return as resulting  from the sale of the  technology of ISI
that is deemed to occur in the Deemed Asset Sale (as defined in Section 6.14) or
Actual Asset Transfer,  (v) "Final  Determination  Ordinary Income Amount" shall
mean the amount of gain that does not constitute long term capital gain that DRG
Holdings is, pursuant to a final,  irrevocable and  unappealable  determination,
required to recognize for federal income tax purposes as a result of the sale of
the  technology  of ISI that is deemed  to occur in the  Deemed  Asset  Sale (as
defined  in  Section  6.14) or  Actual  Asset  Transfer  and  (vi)  "Preliminary
Determination  Ordinary  Income  Amount" shall mean the amount of gain that does
not constitute long term capital gain that DRG Holdings is required to recognize
for federal income tax purposes as a result of the sale of the technology of ISI
that is deemed to occur in the Deemed Asset Sale or the Actual  Asset  Transfer,
provided  that DRG Holdings or the Target  Stockholders  are as a result of such
determination  required to pay the additional tax liability associated with such
determination. In the event that (i) the Reported Ordinary Income Amount is less
than or equal to the Floor Amount and (ii) there is an Excess  Amount,  Acquiror
shall  pay to DRG  Holdings  an  amount  equal to the Tax  Gross-Up  plus  costs
incurred  (including  legal and  accounting  fees) to contest the assertion by a
taxing  authority that there is an Excess  Amount.  The Tax Gross-Up shall be an
amount calculated to put the Target Shareholders,  in the aggregate, in the same
after-tax  position  (taking  into  account any  interest or  penalties  and any
interest on the Loan referred to in the last sentence of this Section 9.13) with
respect to the  recognition  of the Excess Amount as they would have been in had
the Excess  Amount  constituted  gain from the sale of a capital  asset held for
more than one year.  As a condition to receiving  the Tax  Gross-Up,  the Target
Shareholders  shall (i) inform Acquiror within 30 days of the date that a taxing
authority asserts that there is an Excess Amount,  (ii) take reasonable  efforts
to contest such  assertion  and (iii) allow  Acquiror,  at its own  expense,  to
participate  in any such  contest.  A Tax Gross Up shall  also be  payable  with
respect to state income  taxes,  with the amount  thereof  being  determined  as
though all references above to federal income taxes, federal income tax returns,
final  determinations and the like shall refer to the corresponding state income
taxes, state income tax returns, state final determinations and the like. In the
event of a Preliminary Determination Ordinary Income Amount that would result in
payment  of a Tax  Gross-Up  amount if the  Preliminary  Determination  Ordinary
Income Amount were a Final Determination  Ordinary Income Amount,  Acquirer will
loan DRG Holdings an amount equal to the amount of such Tax Gross-Up  calculated
as if  the  Preliminary  Determination  Ordinary  Income  Amount  were  a  Final
Determination  Ordinary  Income  Amount.  The loan (i) shall be unsecured,  (ii)
shall bear interest at the federal  short-term  rate (as defined in Code Section
1274(d))  as in effect  during the period that such loan is  outstanding,  (iii)
shall be due within thirty days (30) after the determination that results in the
Preliminary  Determination Ordinary Income Amount becoming a final,  irrevocable
and  unappealable  determination,  and (iv) shall have other customary terms and
conditions reasonably agreed to by Acquirer and DRG Holdings.


                                    ARTICLE X

                               GENERAL PROVISIONS

10.1 Notices. All notices and other communications hereunder shall be in writing
and shall be deemed  given if delivered  personally  or by  commercial  delivery
service, or mailed by registered or certified mail (return receipt requested) or
sent  via  facsimile  (with  confirmation  of  receipt)  to the  parties  at the
following address (or at such other address for a party as shall be specified by
like notice):

(a)      if to Acquiror, to:


                                            Legato Systems, Inc.
                                            3210 Porter Drive
                                            Palo Alto, CA  94304
                                            Attention:        President
                                            Facsimile No.: (650) 812-6032
                                            Telephone No.: (650) 812-6000

                                            with a copy to:

                                            Gunderson Dettmer Stough Villeneuve
                                            Franklin & Hachigian, LLP
                                            155 Constitution Drive
                                            Menlo Park, CA 94025
                                            Attention:Robert V. Gunderson, Jr.
                                            Facsimile No.: (650) 321-2800
                                            Telephone No.: (650) 463-5200

(b)      if to Target, to:

                                            George Wilson
                                            1261 Farm Road
                                            Berwyn, PA  19312
                                            Attention:        President
                          Telephone No.: (610) 251-9198

                                            with a copy to:

                                            Fenwick & West LLP
                                            Two Palo Alto Square
                                            Palo Alto, CA  94306
                                            Attention:       Jacqueline A. Daunt
                                            Facsimile No.: (650) 494-1417
                                            Telephone No.: (650) 494-0600

10.2  Interpretation.  When a reference  is made in this  Agreement to Exhibits,
such  reference  shall  be to an  Exhibit  to this  Agreement  unless  otherwise
indicated.  The words  "include,"  "includes" and  "including"  when used herein
shall be deemed in each case to be followed by the words  "without  limitation."
In this Agreement, any reference to any event, change, condition or effect being
"material"  with  respect to any entity or group of entities  means any material
event,  change,  condition  or effect  related to the  condition  (financial  or
otherwise),  properties,  assets  (including  intangible  assets),  liabilities,
business,  operations  or  results  of  operations  of such  entity  or group of
entities.  Any  reference  to a "Material  Adverse  Effect"  with respect to any
entity or group of entities means any event, change or effect that is materially
adverse to the condition (financial or otherwise), properties, assets (including
intangible assets),  liabilities,  business, operations or results of operations
of such entity and its  subsidiaries,  taken as a whole. In this Agreement,  any
reference to a party's "knowledge" means such party's actual knowledge after due
and  diligent   inquiry  of  officers  and  directors  of  such  party  and  its
subsidiaries  reasonably believed to have knowledge of such matters.  The phrase
"made  available" in this Agreement shall mean that the information  referred to
has been made available if requested by the party to whom such information is to
be made available. The phrases "the date of this Agreement",  "the date hereof",
and terms of similar import,  unless the context  otherwise  requires,  shall be
deemed  to refer to  January  27,  1999.  The  table of  contents  and  headings
contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or interpretation of this Agreement.

10.3  Counterparts.  This Agreement may be executed in one or more counterparts,
all of which shall be  considered  one and the same  agreement  and shall become
effective when one or more  counterparts have been signed by each of the parties
and delivered to the other parties,  it being  understood  that all parties need
not sign the same counterpart.

10.4 Entire Agreement; No Third Party Beneficiaries.  This Agreement,  the other
Transaction  Documents and the documents and  instruments  and other  agreements
specifically  referred to herein or delivered  pursuant  hereto,  including  the
Exhibits, the Schedules, including the Target Disclosure Letter and the Acquiror
Disclosure Letter constitute the entire agreement among the parties with respect
to  the  subject   matter  hereof  and  supersede  all  prior   agreements   and
understandings,  both  written and oral,  among the parties  with respect to the
subject matter hereof,  except for the  Confidentiality  Agreement,  which shall
continue in full force and effect,  and shall  survive any  termination  of this
Agreement or the Closing, in accordance with its terms. This Agreement shall not
confer upon any other person any rights or remedies hereunder.

10.5  Severability.  In the event that any provision of this  Agreement,  or the
application thereof, becomes or is declared by a court of competent jurisdiction
to be illegal,  void or  unenforceable,  the  remainder of this  Agreement  will
continue in full force and effect and the application of such provision to other
persons or  circumstances  will be  interpreted  so as  reasonably to effect the
intent of the parties hereto.  The parties further agree to replace such void or
unenforceable provision of this Agreement with a valid and enforceable provision
that will achieve,  to the extent  possible,  the  economic,  business and other
purposes of such void or unenforceable provision.

10.6 Remedies Cumulative.  Any and all remedies herein expressly conferred upon
a party will be deemed  cumulative  with and not  exclusive  of any other remedy
conferred  hereby,  or by law or equity upon such party,  and the  exercise by a
party of any one remedy will not preclude the exercise of any other remedy.

10.7  Governing  Law.  This  Agreement  shall be governed by and  construed  in
accordance with the laws of the State of California without regard to applicable
principles of conflicts of law. Each of the parties hereto irrevocably  consents
to  the  exclusive  jurisdiction  of any  court  located  within  the  State  of
California,  in  connection  with any matter  based upon or arising  out of this
Agreement or the matters contemplated herein,  agrees that process may be served
upon them in any manner  authorized by the laws of the State of  California  for
such persons and waives and covenants not to assert or plead any objection which
they might otherwise have to such jurisdiction and such process.

10.8  Assignment.  Neither this  Agreement nor any of the rights,  interests or
obligations hereunder shall be assigned by any of the parties hereto (whether by
operation of law or otherwise)  without the prior  written  consent of the other
parties. Subject to the preceding sentence, this Agreement will be binding upon,
inure to the benefit of and be enforceable  by the parties and their  respective
successors and permitted assigns.

10.9  Rules of  Construction.  The  parties  hereto  agree  that they have been
represented by counsel during the negotiation, preparation and execution of this
Agreement and, therefore, waive the application of any law, regulation,  holding
or rule of  construction  providing  that  ambiguities  in an agreement or other
document  will be  construed  against  the  party  drafting  such  agreement  or
document.

10.10 California  Commissioner of Corporations.  THE SALE OF THE SECURITIES THAT
ARE THE SUBJECT OF THIS AGREEMENT HAS NOT BEEN  QUALIFIED WITH THE  COMMISSIONER
OF  CORPORATIONS  OF THE STATE OF CALIFORNIA AND THE ISSUANCE OF SUCH SECURITIES
OR THE PAYMENT OR RECEIPT OF ANY PART OF THE  CONSIDERATION  FOR SUCH SECURITIES
PRIOR TO SUCH QUALIFICATION IS UNLAWFUL, UNLESS THE SALE OF SECURITIES IS EXEMPT
FROM   QUALIFICATION  BY  SECTION  25100,  25102  OR  25105  OF  THE  CALIFORNIA
CORPORATIONS  CODE.  THE RIGHTS OF ALL PARTIES TO THIS  AGREEMENT  ARE EXPRESSLY
CONDITIONED  UPON  SUCH  QUALIFICATION  BEING  OBTAINED,  UNLESS  THE SALE IS SO
EXEMPT.



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


                                                          LEGATO SYSTEMS, INC.



                                                    By:                         
                                                    Name:                       
                                                    Title:                      


                                                     INTELLIGUARD SOFTWARE, INC.



                                                     By:                        
                                                     Name:                      
                                                     Title:                     



                                                      O.R.P., INC.



                                                      By:                       
                                                      Name:                     
                                                      Title:                    


                                                      DRG HOLDINGS, INC.


                                                      By:                      
                                                      Name:                    
                                                      Title:                   


<PAGE>



                                                      Roger Stager



                                                      Donald Trimmer



                                                      George Wilson






<PAGE>



                                                                     EXHIBIT 5.1

April 2, 1999

Legato Systems, Inc.
3210 Porter Drive
Palo Alto, California  94304

Re:  REGISTRATION STATEMENT ON FORM S-3


Ladies and Gentlemen:

         We have examined the Registration Statement on Form S-3 filed by Legato
Systems,  Inc. (the "Company") with the Securities and Exchange  Commission (the
"Commission") on April 2, 1999, (the  "Registration  Statement"),  in connection
with the  registration  under the Securities  Act of 1933, as amended,  of up to
720,000  shares of the  Company's  Common Stock of certain  stockholders  of the
Company (the "Shares"). As your counsel in connection with this transaction,  we
have  examined  the  proceedings  taken and are  familiar  with the  proceedings
proposed  to be taken by you in  connection  with the sale and  issuance  of the
Shares.

         It is our opinion that the Shares are legally and validly issued, fully
paid and non-assessable.

         We  consent  to the use of  this  opinion  as an  exhibit  to the  said
Registration  Statement,  and  further  consent to the use of our name  wherever
appearing in said Registration Statement,  including the prospectus constituting
a part thereof, and in any amendment or supplement thereto.

                                           Very truly yours,

                                           /s/ Gunderson Dettmer Stough
                                           Villeneuve Franklin & Hachigian, LLP

                                           GUNDERSON DETTMER STOUGH
                                           VILLENEUVE FRANKLIN & HACHIGIAN, LLP


<PAGE>


                                                                    EXHIBIT 23.1

                       CONSENT OF INDEPENDENT ACCOUNTANTS

We consent to the  incorporation by reference in the  Registration  Statement on
Form S-3 of Legato Systems, Inc. (the "Company") for the registration of 720,000
shares of its common  shares,  of our reports  dated  January 18,  1999,  on our
audits of the consolidated financial statements and financial statement schedule
of the  Company  as of  December  31,  1998 and 1997,  and for the  years  ended
December 31,  1998,  1997 and 1996 which  reports are included in the  Company's
1998  Annual  Report on Form  10-K/A,  filed with the  Securities  and  Exchange
Commission.  We also  consent to the  reference  to our firm  under the  caption
"Experts".



/s/ PRICEWATERHOUSECOOPERS LLP

San Jose, California
April 2, 1999



<PAGE>


                                                                    EXHIBIT 23.3

                        CONSENT OF DELOITTE & TOUCHE LLP

     We consent to the incorporation by reference in this registration statement
of Legato  Systems,  Inc.  on Form S-3 of our report  dated July 23, 1998 on the
consolidated  financial  statements  of Qualix  Group,  Inc.,  appearing  in the
registration statement No. 333-74433 on Form S-4 of Legato Systems, Inc. We also
consent to the  reference to us under the heading  "Experts" in the  prospectus,
which is part of this Registration Statement.



/s/ DELOITTE & TOUCHE LLP

San Jose, California
April 2, 1999


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