REGISTRATION RIGHTS AGREEMENT


         THIS REGISTRATION RIGHTS AGREEMENT,  dated as of February 1, 1996 (this
"Agreement"),  is made between EDITEK,  Inc., a corporation  organized under the
laws of Delaware (the "Company"), and Harry McCoy (the "Investor").

                              W I T N E S S E T H:

         WHEREAS,  the Investor is purchasing  235,295  shares (the "Shares") of
Common Stock of the Company; and

         WHEREAS, the Company is agreeing to provide certain registration rights
under the  Securities  Act of 1933,  as amended,  and the rules and  regulations
thereunder,  or any similar  successor  statute  (collectively,  the "Securities
Act"), and applicable state securities laws with respect to the Shares.

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants  contained  herein  and other  good and  valuable  consideration,  the
receipt and  sufficiency of which are hereby  acknowledged,  the Company and the
Investor hereby agree as follows:

         1.       Definitions.

                  (a)      As used in this Agreement, the following terms shall 
have the following meanings:

                           (i)  "Register,"   "registered,"  and  "registration"
refer  to a  registration  effected  by  preparing  and  filing  a  Registration
Statement  or  Statements  in  compliance   with  the  Securities  Act  on  such
appropriate registration form promulgated by the Commission as shall be selected
by the  Company  and  the  declaration  or  ordering  of  effectiveness  of such
Registration  Statement by the United States Securities and Exchange  Commission
("SEC") and applicable state laws.

                           (ii)     "Registrable Securities" means the Shares.

                           (iii)  "Registration  Statement" means a registration
statement under the Securities Act registering securities of the Company.

         2.       Registration.

                  (a)  Piggy-Back  Registrations.  Subject to the  provisions of
Sections 3 and 4 hereof,  if at any time the Company shall  determine to prepare
and file with the SEC a





Registration  Statement  relating to an offering under the Securities Act of any
of its equity  securities  for its own account or the  account of others,  other
than on Form  S-4 or Form S-8 or  their  then  equivalents  relating  to  equity
securities to be issued solely in connection  with any acquisition of any entity
or business or equity  securities  issuable in  connection  with stock option or
other employee  benefit  plans,  the Company shall send to the Investor who owns
Registrable  Securities  written  notice of such  determination  and,  if within
twenty (20) days after receipt of such notice,  the Investor shall so request in
writing,  the Company  shall include in such  Registration  Statement all or any
part of the Investor's  Registrable  Securities that the Investor requests to be
registered,  except that if, in connection with any underwritten public offering
for the account of the Company the managing  underwriter(s) thereof shall impose
a  limitation  on the number of shares of Common  Stock which may be included in
the Registration  Statement  because,  in such  underwriter(s)'  judgment,  such
limitation  is  necessary  to effect an orderly  public  distribution,  then the
Company shall be obligated to include in such  Registration  Statement only such
limited portion, if any, of the Registrable Securities with respect to which the
Investor  has  requested  inclusion  hereunder.  Any  exclusion  of  Registrable
Securities and other  securities  having  registration  rights shall be made pro
rata among the Investor and other  shareholders  seeking to include  Registrable
Securities and other securities having  registration rights and in proportion to
the number of Registrable  Securities and other securities  having  registration
rights sought to be included in such registration;  provided,  however, that the
Company  shall not exclude  any  Registrable  Securities  unless the Company has
first excluded all outstanding  securities the holders of which are not entitled
to  inclusion  of  securities  in  such  Registration  Statement.  No  right  to
registration  of  Registrable  Securities  under  this  Section  2(a)  shall  be
construed to limit any  registration  required  under  Section 2(b) hereof.  The
obligations  of the Company  under this  Section 2(a) shall  terminate  upon the
earlier of (i)  February  1, 1999 or (ii) after the  Company  has  afforded  the
opportunity for the Investor to exercise  registration rights under this Section
2(a) for two  registrations;  provided,  however,  that if the  Investor has any
Registrable  Securities  excluded from any Registration  Statement in accordance
with this  Section  2(a),  the  Investor  shall be  entitled  to  include  in an
additional   Registration   Statement  filed  by  the  Company  the  Registrable
Securities so excluded.

                  (b)  Immediate  Registration.  Subject  to the  provisions  of
Sections 3 and 4 hereof,  the  Company  shall  prepare  and file a  Registration
Statement  with the SEC within fifteen (15) business days after the date hereof;
provided, however, that such registration statement need not be filed until five
(5)  business  days  after  the  Investor  has  provided  the  Company  with all
information  reasonably  requested  by  the  Company  in  connection  with  such
registration.

                  (c) If any  registration is  underwritten,  the Investor shall
pay all  underwriting  discounts and commissions with respect to the Registrable
Securities of the Investor  included  therein and the fees and expenses of legal
counsel of the Investor.


                                                         2





                  (d)  Nothing  herein  shall  limit the right of the Company to
grant registration rights to any other person or entity and to include shares of
such person or entity on any Registration Statement.

         3.  Obligations of the Company.  In connection with the registration of
the Registrable Securities under this Agreement, the Company shall:

                  (a) prepare promptly and file with the SEC promptly (but in no
event later than 15 business  days after the  Closing  Date of the  transactions
contemplated by the Purchase  Agreement) a Registration  Statement or Statements
with  respect  to  all  Registrable  Securities  to  be  included  therein,  and
thereafter  use its best efforts to cause the  Registration  Statement to become
effective as soon as reasonably possible after such filing. If such Registration
Statement is filed pursuant to Rule 415, the Company shall keep the Registration
Statement  effective pursuant to Rule 415 at all times until such date as is two
years after the date such  Registration  Statement is first ordered effective by
the SEC. In any case, the  Registration  Statement  (including any amendments or
supplements  thereto and  prospectuses  contained  therein) filed by the Company
shall not contain  any 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,  in light of the circumstances in which they were made, not misleading;
provided,  however,  that,  subject to the  conditions set forth in Section 4(a)
below,  the Investor may notify the Company in writing that it wishes to exclude
all or a portion of its Registrable Securities from such Registration Statement.

                  (b) prepare and file with the SEC such  amendments  (including
post-effective amendments) and supplements to the Registration Statement and the
prospectus  used  in  connection  with  the  Registration  Statement  as  may be
necessary to keep the Registration  Statement  effective at all times until such
date as is two years after the date such Registration Statement is first ordered
effective by the SEC, and, during such period, comply with the provisions of the
Securities Act with respect to the disposition of all Registrable  Securities of
the Company covered by the Registration Statement until such time as all of such
Registrable  Securities have been disposed of by the Investor in accordance with
the  intended  methods  of  disposition  by the  Investor  as set  forth  in the
Registration Statement.

                  (c) furnish to the Investor whose  Registrable  Securities are
included in the Registration  Statement,  such number of copies of a prospectus,
including a preliminary  prospectus,  and all amendments and supplements thereto
promptly  upon  approval  thereof  by the SEC and such  other  documents  as the
Investor may reasonably  request in order to facilitate  the  disposition of the
Registrable  Securities owned by the Investor;  The Company shall provide copies
of all such  documents  upon  approval  thereof  by the SEC to  counsel  for the
Initial Investor at such address designated in writing by the Initial Investor;

                  (d)  (i)  register  or  qualify,   or  obtain  exemption  from
registration or  qualification  for, the Registrable  Securities  covered by the
Registration  Statement  under  such other  securities  or blue sky laws of such
jurisdictions as required for sale of the Registrable

                                                         3





Securities by the Investor as the Investor reasonably requests, (ii) prepare and
file  in  those   jurisdictions   such  amendments   (including   post-effective
amendments) and  supplements,  (iii) take such other actions as may be necessary
to maintain such  registrations or  qualifications  in effect at all times until
February  1,  1998 and (iv)  take all  other  actions  reasonably  necessary  or
advisable to qualify the Registrable  Securities for sale in such  jurisdictions
or to  otherwise  permit the Holders to dispose of the  Registrable  Securities;
provided,  however,  that  the  Company  shall  not be  required  in  connection
therewith  or as a  condition  thereto  to (I)  qualify  to do  business  in any
jurisdiction  where it would not  otherwise  be required to qualify but for this
Section 3(d), (II) subject itself to general taxation in any such  jurisdiction,
(III) file a general  consent  to  service of process in any such  jurisdiction,
(IV) make any change in its charter or by-laws,  which in each case the Board of
Directors of the Company  determines to be contrary to the best interests of the
Company and its stockholders or (V) subject any officer, director or shareholder
to any penalty or risk of  forfeiture  other than those  penalties  and risks to
which  officers and  directors  are  ordinarily  liable in a public  offering of
securities;

                  (e) in  the  event  the  Investor  shall  select  one or  more
underwriters for the offering,  or an underwritten  public offering is conducted
pursuant to Section 2(a) hereof, enter into and perform its obligations under an
underwriting   agreement  in  usual  and  customary  form,  including,   without
limitation,  customary  indemnification and contribution  obligations,  with the
managing underwriter of such offering;

                  (f) as promptly as  practicable  after  becoming aware of such
event,  notify  the  Investor  if the  Investor  continues  to hold  Registrable
Securities  being sold  pursuant to such  registration  of the  happening of any
event of which the Company has  knowledge,  as a result of which the  prospectus
included in the Registration  Statement,  as then in effect,  contains an untrue
statement of a material  fact or omits to state a material  fact  required to be
stated  therein or necessary  to make the  statements  therein,  in light of the
circumstances  under  which they were  made,  not  misleading,  and use its best
efforts  promptly  to prepare a  supplement  or  amendment  to the  Registration
Statement to correct such untrue statement or omission,  and deliver a number of
copies of such  supplement  or  amendment  to the  Investor as the  Investor may
reasonably request;

                  (g) as promptly as  practicable  after  becoming aware of such
event,  notify  the  Investor  if the  Investor  continues  to hold  Registrable
Securities  being sold  pursuant  to such  registration  (or, in the event of an
underwritten  offering, the managing underwriters) of the issuance by the SEC of
any  stop  order  or  other  suspension  of  effectiveness  of the  Registration
Statement at the earliest possible time;

                  (h)  furnish  on the  date  that  Registrable  Securities  are
delivered  to an  underwriter  for  sale in  connection  with  the  Registration
Statement  (i) a  letter,  dated  such  date,  from  the  Company's  independent
certified  public  accountants in form and substance as is customarily  given by
independent  certified  public  accountants  to  underwriters  in an underwriter
public offering, addressed to the underwriters; and (ii) an opinion, dated such

                                                         4





date, from counsel  representing  the Company for purposes of such  Registration
Statement,  in form and  substance as is  customarily  given in an  underwritten
public offering, addressed to the underwriters and the Investor;

                  (i)  use  its  best  efforts  either  to  (i)  cause  all  the
Registrable Securities covered by the Registration Statement to be listed on the
American  Stock  Exchange or another  national  securities  exchange and on each
additional  national  securities  exchange on which similar securities issued by
the  Company  are  then  listed,  if any,  if the  listing  of such  Registrable
Securities  is then  permitted  under the rules of such  exchange or (ii) secure
designation  of all  the  Registrable  Securities  covered  by the  Registration
Statement as a National  Association of Securities Dealers Automated  Quotations
System  ("NASDAQ")  "national market system security" within the meaning of Rule
11Aa2-1 of the SEC under the  Securities  Exchange Act of 1934,  as amended (the
"Exchange Act"),  and the quotation of the Registrable  Securities on the NASDAQ
National Market System or, if, despite the Company's best efforts to satisfy the
preceding  clause (i) or (ii),  the Company is  unsuccessful  in satisfying  the
preceding  clause  (i) or (ii),  to  secure  listing  on a  national  securities
exchange or NASDAQ authorization and quotation for such Registrable Securities;

                  (j)  provide a transfer  agent and  registrar,  which may be a
single entity, for the Registrable  Securities not later than the effective date
of the Registration Statement;

                  (k) cooperate with the managing  underwriter or  underwriters,
if any, to facilitate the timely preparation and delivery of certificates to the
transferees to whom such Registrable  Securities are being sold (not bearing any
restrictive  legends)  pursuant to the  denominations or amounts as the case may
be, and registered,  in such names as the managing  underwriter or underwriters,
if any, or the Investor may reasonably request;  and, within three business days
after a Registration  Statement which includes Registrable Securities is ordered
effective by the SEC, the Company  shall  deliver,  or shall cause legal counsel
selected by the Company to deliver,  to the transfer  agent for the  Registrable
Securities (with copies to the Investor whose  Registrable  Securities are being
sold) instructions to the transfer agent to issue new stock certificates without
a legend to such transferees and an opinion of such counsel that the shares have
been registered; and

                  (l) take all other  reasonable  actions  necessary to expedite
and  facilitate  disposition  by  the  Investor  of the  Registrable  Securities
pursuant to the Registration Statement.

                  (m) Notwithstanding the foregoing,  the Company's  obligations
in connection with the  registration of Registrable  Securities shall be limited
as follows:

                           (i) The  Company  shall not be  obligated  under this
Agreement to register or include in any registration Registrable Securities that
the Investor has  requested to be  registered  if the Company  shall furnish the
Investor  with a written  opinion  of  counsel  reasonably  satisfactory  to the
Investor, that all Registrable Securities that the Investor holds

                                                         5





may be publicly offered,  sold or distributed without registration under the Act
pursuant to Rule 144 without restriction as to the amount of securities that can
be sold.

                           (ii) The Company's  obligation  to amend,  supplement
and  cause  to  continue  to be  effective  any  registration  statement  may be
suspended,  for a  reasonable  period of time,  not to  exceed  45 days,  if the
Company  has been  advised in writing by  independent  legal  counsel  that such
filing would require the disclosure of a material transaction or other facts and
the Board of Directors of the Company  determines  reasonably  and in good faith
that such  disclosure  would have a  material,  adverse  effect on the  Company;
provided,  however,  that the  Company  shall  not under  any  circumstances  be
permitted  to  exercise  such  rights more than two (2) times in any twelve (12)
month period.  The Company shall  immediately  notify in writing the Investor if
the  Investor   continues  to  hold  Registrable   Securities  covered  by  such
registration  statement of such  determination,  and the Investor shall maintain
the confidentiality of such notice and shall cease all trading in the securities
of the  Company  until the Company  notifies  the  Investor in writing  that the
circumstances  that caused such suspension or postponement are no longer present
and that the Registration  Statement is currently  effective.  The Company shall
use its best efforts to promptly  take all such  actions  necessary to eliminate
any such suspension or postponement as soon as reasonably possible.

                           (iii) The Company may in its discretion  grant to any
owner of securities of the Company registration rights of any kind or nature.


         4. Obligations of the Investor.  In connection with the registration of
the Registrable Securities, the Investor shall have the following obligations:

                  (a) It shall be a condition  precedent to the  obligations  of
the Company to take any action  pursuant to this  Agreement  with respect to the
Investor  that the Investor  furnish to the Company such  information  regarding
itself,  the  Registrable  Securities  held by it and  the  intended  method  of
disposition  of the  Registrable  Securities  held by it as shall be  reasonably
required to effect the  registration of the  Registrable  Securities and execute
such  documents  in  connection  with  such  registration  as  the  Company  may
reasonably  request.  At least fifteen (15) days prior to the first  anticipated
filing date of the Registration Statement, the Company shall notify the Investor
of the  information  the Company  requires  from the  Investor  (the  "Requested
Information")  if the Investor elects to have any of the Investor's  Registrable
Securities included in the Registration  Statement.  If within five (5) business
days prior to the filing  date the  Company  has not  received a signed  writing
containing  the Requested  Information  from the Investor  (the  "Non-Responsive
Investor"),  then  the  Company  may  file the  Registration  Statement  without
including Registrable Securities of the NonResponsive Investor;

                  (b)  The  Investor  by  the   Investor's   acceptance  of  the
Registrable  Securities  agrees to  cooperate  with the  Company  as  reasonably
requested by the Company in connection

                                                         6





with the preparation and filing of the Registration Statement hereunder,  unless
the Investor has notified the Company in writing of the  Investor's  election to
exclude  all of the  Investor's  Registrable  Securities  from the  Registration
Statement;

                  (c) In the event the  Company  or the  holders  of  securities
being  registered  determine  to  engage  the  services  of  an  underwriter  in
accordance  with Section 2(b) hereof,  or in  connection  with any  underwritten
public  offering  pursuant to Section 2(a) hereof,  the Investor agrees to enter
into and perform the Investor's obligations under an underwriting  agreement, in
usual   and   customary   form,   including,   without   limitation,   customary
indemnification and contribution  obligations,  with the managing underwriter of
such offering and take such other actions as are reasonably required in order to
expedite or facilitate the disposition of the Registrable Securities, unless the
Investor  has  notified  the  Company in writing of the  Investor's  election to
exclude  all of the  Investor's  Registrable  Securities  from the  Registration
Statement,  and the Company shall have no obligation to register the Registrable
Securities if the Investor fails to comply with this paragraph;

                  (d) The Investor  agrees that, upon receipt of any notice from
the Company of the happening of any event of the kind  described in Section 3(f)
and 3(g), the Investor will immediately  discontinue  disposition of Registrable
Securities  pursuant to the  Registration  Statement  covering such  Registrable
Securities  until the Investor's  receipt of the copies of the  supplemented  or
amended  prospectus  contemplated by Section 3(f) or 3(g) and, if so directed by
the  Company,  the Investor  shall,  at the option of the  Investor,  either (i)
deliver to the Company or (ii) destroy (and deliver to the Company a certificate
of  destruction)  all copies in the  Investor's  possession,  of the  prospectus
covering  such  Registrable  Securities  current  at the time of receipt of such
notice; and

                  (e) The Investor  may not  participate  and the Company  shall
have no obligation to register the Registrable Securities of the Investor in any
underwritten  registration  hereunder unless the Investor (i) agrees to sell the
Investor's  Registrable  Securities  on the basis  provided in any  underwriting
arrangements  approved  by the  Investor  entitled  hereunder  to  approve  such
arrangements,  (ii)  completes  and  executes  all  questionnaires,   powers  of
attorney,  indemnities,  underwriting  agreements and other documents reasonably
required under the terms of such  underwriting  arrangements and (iii) agrees to
pay its pro rata share of all underwriting  discounts and commissions applicable
with  respect  to its  Registrable  Securities,  in each case to the  extent not
payable by the Company pursuant to the terms of this Agreement.

         5.  Expenses of  Registration.  All expenses  (other than  underwriting
discounts and commissions or brokerage  commissions) incurred in connection with
registrations,  filings or  qualifications  pursuant  to  Section 3,  including,
without limitation, all registration, listing and qualifications fees, printers'
and accounting fees and the fees and  disbursements  of counsel for the Company,
shall be borne by the Company;  provided,  however, that the Investor shall bear
the fees and out-of-pocket expenses of any legal counsel of the Investor.


                                                         7





         6.  Indemnification.  In  the  event  any  Registrable  Securities  are
included in a Registration Statement under this Agreement:

                  (a) To the extent permitted by law, the Company will indemnify
and hold  harmless  the  Investor  who holds such  Registrable  Securities,  any
underwriter (as defined in the Securities Act) for the Investor,  the directors,
if any, of any underwriter and the officers,  if any, of such  underwriter,  and
each person, if any, who controls any such underwriter within the meaning of the
Securities Act or the Exchange Act (each, an "Indemnified Person"),  against any
losses,   claims,   damages,   expenses  or   liabilities   (joint  or  several)
(collectively "Claims") to which any of them become subject under the Securities
Act,  the  Exchange  Act or  otherwise,  insofar as such  Claims (or  actions or
proceedings,  whether commenced or threatened,  in respect thereof) arise out of
or are based upon any of the  following  statements,  omissions or violations in
the Registration  Statement,  or any post-effective  amendment  thereof,  or any
prospectus  included  therein:  (i)  any  untrue  statement  or  alleged  untrue
statement  of a material  fact  contained in the  Registration  Statement or any
post-effective  amendment  thereof or 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,  (ii) any untrue statement or alleged untrue
statement of a material  fact  contained in any  preliminary  prospectus if used
prior to the effective date of such Registration  Statement, or contained in the
final prospectus (as amended or supplemented, if the Company files any amendment
thereof or supplement  thereto with the SEC) or the omission or alleged omission
to state  therein  any  material  fact  necessary  to make the  statements  made
therein,  in light of the circumstances  under which the statements therein were
made, not misleading or (iii) any violation or alleged  violation by the Company
of the Securities Act, the Exchange Act or any state  securities law or any rule
or  regulation  (the matters in the  foregoing  clauses (i) through (iii) being,
collectively,  "Violations").  Subject to the  restrictions set forth in Section
6(d) with respect to the number of legal  counsel,  the Company shall  reimburse
the Investor and each such underwriter or controlling  person,  promptly as such
expenses  are  incurred  and are due and  payable,  for any legal  fees or other
reasonable  expenses  incurred  by  them in  connection  with  investigating  or
defending  any such Claim.  Notwithstanding  anything to the contrary  contained
herein, the  indemnification  agreement contained in this Section 6(a) (I) shall
not apply to a Claim  arising out of or based upon a Violation  which  occurs in
reliance upon and in  conformity  with  information  furnished in writing to the
Company by any  Indemnified  Person or underwriter for such  Indemnified  Person
expressly  for  use in  connection  with  the  preparation  of the  Registration
Statement, preliminary prospectus, final prospectus or any amendments thereof or
supplements thereto, if such prospectus was timely made available by the Company
pursuant to Section 3(c) hereof; (II) with respect to any preliminary prospectus
shall not inure to the benefit of any such person from whom the person asserting
any such Claim purchased the Registrable Securities that are the subject thereof
(or  to the  benefit  of any  person  controlling  such  person)  if the  untrue
statement or omission of material fact contained in the  preliminary  prospectus
was  corrected  in the  prospectus,  as then  amended or  supplemented,  if such
prospectus  was timely made  available  by the Company  pursuant to Section 3(c)
hereof;  and (III) shall not apply to amounts paid in settlement of any Claim if
such settlement is effected without the prior

                                                         8





written  consent  of the  Company,  which  consent  shall  not  be  unreasonably
withheld. Such indemnity shall remain in full force and effect regardless of any
investigation made by or on behalf of the Indemnified Persons.

                  (b) In connection with any Registration Statement in which the
Investor is  participating,  the Investor agrees to indemnify and hold harmless,
to the same  extent  and in the same  manner  set  forth in  Section  6(a),  the
Company, each of its directors,  each of its officers who signs the Registration
Statement,  each person,  if any, who controls the Company within the meaning of
the  Securities  Act  or  the  Exchange  Act,  any  underwriter  and  any  other
stockholder selling securities pursuant to the Registration  Statement of any of
its  directors  or  officers  or any person who  controls  such  stockholder  or
underwriter  within  the  meaning  of the  Securities  Act or the  Exchange  Act
(collectively and together with an Indemnified person, an "Indemnified  Party"),
against any Claims to which any of them may become subject, under the Securities
Act, the Exchange Act or otherwise,  insofar as such Claims(s)  arises out of or
is based  upon any  Violation(s),  in each case to the  extent  (and only to the
extent) that such  Violation(s)  occurs in reliance upon and in conformity  with
written  information  furnished to the Company by the Investor expressly for use
in connection with such Registration  Statement;  and the Investor will promptly
reimburse any legal or other expenses  reasonably incurred by them in connection
with  investigating  or defending any such Claim;  provided,  however,  that the
Investor shall be liable under this Section 6(b) for only that amount of a Claim
as does not exceed the net  proceeds to the  Investor as a result of the sale of
Registrable Securities pursuant to such Registration  Statement.  Such indemnity
shall remain in full force and effect regardless of any investigation made by or
on  behalf of such  Indemnified  Party and shall  survive  the  transfer  of the
Registrable  Securities by the Investor  pursuant to Section 9.  Notwithstanding
anything to the contrary herein, the indemnification agreement contained in this
Section 6(b) with respect to any preliminary  prospectus  shall not inure to the
benefit of any Indemnified Party if the untrue statement or omission of material
fact contained in the preliminary  prospectus was corrected on a timely basis in
the prospectus, as then amended or supplemented.

                  (c) The Company shall be entitled to receive  indemnities from
underwriters,  selling brokers,  dealer managers and similar securities industry
professionals participating in any distribution,  to the same extent as provided
above,  with respect to information such persons so furnished in writing by such
persons expressly for inclusion in the Registration Statement.

                  (d)  Promptly  after  receipt  by  an  Indemnified  Person  or
Indemnified  Party  under this  Section 6 of notice of the  commencement  of any
action  (including  any  governmental   action),   such  Indemnified  Person  or
Indemnified Party shall, if a Claim in respect thereof is to be made against any
indemnifying  party under this  Section 6, 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
control  of the  defense  thereof  with  counsel  mutually  satisfactory  to the
indemnifying parties; provided,

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however, that an Indemnified Person or Indemnified Party shall have the right to
retain  its  own  counsel,  with  the  fees  and  expenses  to be  paid  by  the
indemnifying  party,  if, in the reasonable  opinion of counsel  retained by the
indemnifying party, the representation by such counsel of the Indemnified Person
or Indemnified  Party and the indemnifying  party would be inappropriate  due to
actual or  potential  differing  interests  between such  Indemnified  Person or
Indemnified Party and indemnifying  party in such proceeding.  The Company shall
pay for  only  one  separate  legal  counsel  for  the  Investor  as may  become
Indemnified Parties or Indemnified Persons; such legal counsel shall be selected
by the Investor  holding a majority in interest of the  Registrable  Securities.
The  failure  to  deliver  written  notice to the  indemnifying  party  within a
reasonable  time of the  commencement  of any such action shall not relieve such
indemnifying  party of any liability to the  Indemnified  Person or  Indemnified
Party under this Section 6, except to the extent that the indemnifying  party is
prejudiced in its ability to defend such action. The indemnification required by
this Section 6 shall be made by periodic  payments of the amount  thereof during
the course of the  investigation or defense,  as such expense,  loss,  damage or
liability is incurred and is due and payable.

                  (e) Any Holder  required to indemnify  the Company as provided
in this  Section  6 shall  cease to have the right to  participate  in any other
registration pursuant to this Agreement.

         7. Contribution.  To the extent any indemnification provided for herein
is  prohibited  or limited by law,  the  indemnifying  party  agrees to make the
maximum contribution with respect to any amounts for which it would otherwise be
liable  under  Section  6 to the  fullest  extent  permitted  by law;  provided,
however,  that (a) no contribution shall be made under  circumstances  where the
maker would not have been liable for  indemnification  under the fault standards
set  forth in  Section  6, (b) no  Holder of  Registrable  Securities  guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities Act) shall be entitled to contribution from any Holder of Registrable
Securities  who was not  guilty  of such  fraudulent  misrepresentation  and (c)
contribution by any Holder of Registrable  Securities shall be limited in amount
to the net amount of  proceeds  received  by such  Holder  from the sale of such
Registrable Securities.

         8. Reports under  Exchange Act. With a view to making  available to the
Investor the benefits of Rule 144 or any other similar rule or regulation of the
SEC that may at any time permit the Investor to sell  securities  of the Company
to the public without registration, until such time as the Investor has sold all
the  Registrable  Securities  held by the  Investor  pursuant to a  Registration
Statement or Rule 144 or otherwise, the Company agrees to:

                  (a) make and keep public information available, as those terms
are understood and defined in Rule 144;

                  (b) file with the SEC in a timely manner all reports and other
documents required of the Company under the Securities Act and the Exchange Act;
and

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                  (c)  furnish  to the  Investor  so long as the  Investor  owns
Registrable  Securities,  promptly upon request,  (i) a written statement by the
Company that it has complied  with the reporting  requirements  of Rule 144, the
Securities  Act and the Exchange  Act,  (ii) a copy of the most recent annual or
quarterly report of the Company and such other reports and documents so filed by
the Company and (iii) such other  information as may be reasonably  requested to
permit  the  Investor  to sell  such  securities  pursuant  to Rule 144  without
registration.

        9. Assignment of the Registration Rights. The rights to have the Company
register  Registrable  Securities pursuant to this Agreement may not be assigned
by the Initial Investor without the prior written consent of the Company.

         10. Amendment of Registration  Rights.  Any provision of this Agreement
may be amended and the observance  thereof may be waived (either generally or in
a particular instance and either retroactively or prospectively),  only with the
written  consent  of the  Company  and the  Investor.  Any  amendment  or waiver
effected in  accordance  with this Section 10 shall be binding upon the Investor
and the Company.

         11.      Miscellaneous.

                  (a) A person or entity is deemed to be a holder of Registrable
Securities  whenever  such  person or entity  owns of  record  such  Registrable
Securities.  If  the  Company  receives  conflicting  instructions,  notices  or
elections  from  two or more  persons  or  entities  with  respect  to the  same
Registrable  Securities,  the Company shall act upon the basis of  instructions,
notice  or  election  received  from the  registered  owner of such  Registrable
Securities.

                  (b) Notices  required or permitted to be given hereunder shall
be in writing (including facsimile) and shall be deemed to be sufficiently given
and delivered when personally delivered,  faxed (with a copy sent by first class
mail) or when sent by registered mail, return receipt  requested,  addressed (i)
if to the  Company,  at EDITEK,  Inc.,  1238  Anthony  Road,  Burlington,  North
Carolina 27215,  Attention:  Peter J. Heath, Chief Financial Officer, (ii) if to
the Investor,  at the address set forth on the signature  page to this Agreement
and or at such other  address as each such party  furnishes  by notice  given in
accordance  with this Section  11(b),  and shall be effective,  when  personally
delivered,  upon receipt,  when faxed, the day after  transmission,  and when so
sent by certified  mail, four business days after deposit with the United States
Postal Service.

                  (c) Failure of any party to exercise any right or remedy under
this  Agreement,  or otherwise,  or delay by a party in exercising such right or
remedy, shall not operate as a waiver thereof.

                  (d)  This  Agreement  shall  be  enforced,   governed  by  and
construed in accordance with the laws of the State of New York applicable to the
agreements made and to

                                                        11




be performed entirely within such state. In the event that any provision of this
Agreement is invalid or  unenforceable  under any applicable  statute or rule of
law, then such provision  shall be deemed  inoperative to the extent that it may
conflict  therewith and shall be deemed modified to conform with such statute or
rule of law. Any provision hereof which may prove invalid or unenforceable under
any law shall not affect the validity or  enforceability  of any other provision
hereof.

                  (e) This Agreement  constitutes the entire agreement among the
parties  hereto  with  respect  to  the  subject  matter  hereof.  There  are no
restrictions,  promises, warranties or undertakings,  other than those set forth
or  referred to herein.  This  Agreement  supersedes  all prior  agreements  and
understandings  among the  parties  hereto with  respect to the  subject  matter
hereof.

                  (f)  Subject to the  requirements  of  Section 9 hereof,  this
Agreement  shall inure to the benefit of and be binding upon the  successors and
assigns of each of the parties hereto.

                  (g) All  pronouns  and any  variations  thereof  refer  to the
masculine, feminine or neuter, singular or plural, as the context may required.

                  (h) The  headings  in the  Agreement  are for  convenience  of
reference only and shall not limit or otherwise affect the meaning hereof.

                  (i)  This   Agreement   may  be   executed   in  two  or  more
counterparts,  each of which shall be deemed an original  but all of which shall
constitute one and the same agreement. This Agreement, once executed by a party,
may be  delivered  to  the  other  party  hereto  by  telephone  line  facsimile
transmission  of a copy of this Agreement  bearing the signature of the party so
delivering this Agreement.


         IN WITNESS  WHEREOF,  the parties have caused this Agreement to be duly
executed by their  respective  officers  thereunto duly authorized as of day and
year first above written.

EDITEK, INC.                                                  INVESTOR:


By:   /s/ James D. Skinner                       /s/ Harry G. McCoy
Title:  President and CEO                            Harry McCoy

                                                        402 West County Road D
                                                         (Address For Notices)
                                                        St. Paul, MN  55112


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