APPLIED SCIENCE & TECHNOLOGY INC
8-A12G, 1998-03-05
SPECIAL INDUSTRY MACHINERY, NEC
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<PAGE>   1
















                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                  ____________

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                      APPLIED SCIENCE AND TECHNOLOGY, INC.
                                                   
                                                
             (Exact name of registrant as specified in its charter)


              Delaware                                         04-2962110
 (State of incorporation or organization)                     (IRS Employer
                                                             Identification No.)


 35 Cabot Road, Woburn, Massachusetts                              01801
 (Address of principal executive offices)                        (Zip Code)


 Securities to be registered pursuant to Section 12(b) of the Act:


                                      None


 Securities to be registered pursuant to Section 12(g) of the Act:


                         Preferred Share Purchase Rights
                                (Title of Class)
<PAGE>   2

Item 1. Description of Securities To Be Registered.

     On  February  19,  1998,  the Board of  Directors  of Applied  Science  and
Technology,  Inc. (the "COMPANY")   declared a dividend of one  preferred  share
purchase right (a "RIGHT") for each outstanding share of common stock, par value
$0.01 per share (the "COMMON SHARES")  outstanding on March 4, 1998 (the "RECORD
DATE") to the  stockholders  of record on that  date.  Each Right  entitles  the
registered holder to purchase from the Company one  one-thousandth of a share of
Series A Junior  Participating  Preferred  Stock, par value $0.01 per share (the
"PREFERRED SHARES"), of the Company, at a price of $70.00 per one one-thousandth
of a  Preferred  Share  (the  "PURCHASE  PRICE"),  subject  to  adjustment.  The
description  and terms of the  Rights are set forth in a Rights  Agreement  (the
"RIGHTS  AGREEMENT")  between the Company and Continental Stock Transfer & Trust
Company, as Rights Agent (the "RIGHTS AGENT").

     Until the earlier to occur of (i) 10 days  following a public  announcement
that a person  or group of  affiliated  or  associated  persons  (an  "ACQUIRING
PERSON") has  acquired  beneficial  ownership of 15% or more of the  outstanding
Common  Shares or (ii) 10 business days (or such later date as may be determined
by action of the Board of Directors  prior to such time as any Person becomes an
Acquiring Person) following the commencement of, or announcement of an intention
to make, a tender offer or exchange offer the consummation of which would result
in the  beneficial  ownership  by a  person  or  group  of 15% or  more  of such
outstanding   Common  Shares  (the  earlier  of  such  dates  being  called  the
"DISTRIBUTION  DATE"), the Rights will be evidenced,  with respect to any of the
Common Share  certificates  outstanding  as of the Record  Date,  by such Common
Share certificate with a copy of this Summary of Rights attached thereto.

     The Agreement  provides that, until the Distribution  Date, the Rights will
be transferred with and only with the Common Shares. Until the Distribution Date
(or  earlier  redemption  or  expiration  of  the  Rights),   new  Common  Share
certificates  issued  after the Record Date or upon  transfer or new issuance of
Common Shares will contain a notation  incorporating the Agreement by reference.
Until the Distribution Date (or earlier redemption or expiration of the Rights),
the surrender for transfer of any certificates for Common Shares  outstanding as
of the Record  Date,  even  without  such  notation or a copy of this Summary of
Rights being attached  thereto,  will also constitute the transfer of the Rights
associated with the Common Shares  represented by such  certificate.  As soon as
practicable  following the Distribution Date, separate  certificates  evidencing
the  Rights  ("RIGHT  CERTIFICATES")  will be mailed to holders of record of the
Common  Shares as of the Close of  Business  on the  Distribution  Date and such
separate Right Certificates alone will evidence the Rights.

     The Rights are not exercisable until the Distribution Date. The Rights will
expire on  December  31, 2007 (the "FINAL  EXPIRATION  DATE"),  unless the Final
Expiration  Date is extended  or unless the Rights are  earlier  redeemed by the
Company, in each case, as described below.

     The Purchase  Price  payable,  and the number of Preferred  Shares or other
securities  or  property  issuable,  upon  exercise of the Rights are subject to
adjustment  from time to time to  prevent  dilution  (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or  warrants  to  subscribe  for or  purchase  Preferred  Shares at a price,  or
securities  convertible into Preferred Shares with a conversion price, less than
the  then  current  market  price of the  Preferred  Shares  or  (iii)  upon the
distribution to holders of the Preferred  Shares of evidences of indebtedness or
assets  (excluding  regular  periodic  cash  dividends  paid out of  earnings or
retained  earnings or dividends  payable in Preferred Shares) or of subscription
rights or warrants (other than those referred to above).
<PAGE>   3

     The number of outstanding Rights and the number of one one-thousandths of a
Preferred  Share  issuable  upon  exercise  of each  Right are also  subject  to
adjustment  in the  event  of a stock  split  of the  Common  Shares  or a stock
dividend  on the  Common  Shares  payable  in  Common  Shares  or  subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

     Preferred  Shares  purchasable  upon  exercise  of the  Rights  will not be
redeemable.  Each  Preferred  Share will be  entitled  to a  quarterly  dividend
payment of 1000 times the dividend  declared per Common  Share.  In the event of
liquidation,  the  holders  of the  Preferred  Shares  will  be  entitled  to an
aggregate  payment of 1000 times the  aggregate  payment made per Common  Share.
Each  Preferred  Share will have 1000  votes,  voting  together  with the Common
Shares. In the event of any merger,  consolidation or other transaction in which
Common Shares are exchanged,  each  Preferred  Share will be entitled to receive
1000 times the amount  received per Common Share.  These rights are protected by
customary antidilution provisions.

     Because of the nature of the Preferred  Shares'  dividend,  liquidation and
voting rights, the value of the one one-thousandth interest in a Preferred Share
purchasable  upon  exercise of each Right  should  approximate  the value of one
Common Share.

     From and after the occurrence of an event described in Section 11(a)(ii) of
the Rights  Agreement,  if the Rights evidenced by this Right Certificate are or
were at any time on or after the  earlier  of (x) the date of such event and (y)
the Distribution Date (as such term is defined in the Rights Agreement) acquired
or beneficially  owned by an Acquiring Person or an Associate or Affiliate of an
Acquiring  Person (as such terms are  defined  in the  Rights  Agreement),  such
Rights shall become void, and any holder of such Rights shall thereafter have no
right to exercise such Rights.

     In the event that, at any time after a Person becomes an Acquiring  Person,
the Company is acquired in a merger or other business combination transaction or
50% or more of its  consolidated  assets  or  earning  power  are  sold,  proper
provision will be made so that each holder of a Right will  thereafter  have the
right to receive,  upon the exercise  thereof at the then current exercise price
of the Right,  that number of shares of common  stock of the  acquiring  company
which at the time of such  transaction will have a market value of two times the
exercise  price of the Right.  In the event that any person becomes an Acquiring
Person,  proper  provision  shall be made so that each holder of a Right,  other
than Rights  beneficially  owned by the Acquiring  Person and its Affiliates and
Associates  (which will  thereafter be void),  will thereafter have the right to
receive upon  exercise that number of Common Shares having a market value of two
times the exercise price of the Right.  If the Company does not have  sufficient
Common Shares to satisfy such obligation to issue Common Shares, or if the Board
of Directors so elects,  the Company  shall deliver upon payment of the exercise
price of a Right an  amount  of cash or  securities  equivalent  in value to the
Common Shares  issuable upon exercise of a Right;  provided that, if the Company
fails to meet  such  obligation  within 30 days  following  the later of (x) the
first  occurrence of an event triggering the right to purchase Common Shares and
(y) the date on which the  Company's  right to redeem  the Rights  expires,  the
Company must deliver,  upon exercise of a Right but without requiring payment of
the exercise price then in effect,  Common Shares (to the extent  available) and
cash equal in value to the  difference  between  the value of the Common  Shares
otherwise  issuable upon the exercise of a Right and the exercise  price then in
effect.  The Board of Directors may extend the 30-day period described above for
up to an additional 60 days to permit the taking of action that may be necessary
to  authorize  sufficient  additional  Common  Shares to permit the  issuance of
Common Shares upon the exercise in full of the Rights.

     At any time after any Person  becomes an Acquiring  Person and prior to the
acquisition  by any  person or group of a  majority  of the  outstanding  Common
Shares,  the Board of
<PAGE>   4

Directors  of the Company may  exchange  the Rights  (other than Rights owned by
such  person  or group  which  have  become  void),  in whole or in part,  at an
exchange ratio of one Common Share per Right (subject to adjustment).

     With  certain  exceptions,  no  adjustment  in the  Purchase  Price will be
required until  cumulative  adjustments  require an adjustment of at least 1% in
such Purchase Price. No fractional  Preferred  Shares will be issued (other than
fractions  which are  integral  multiples of one  one-thousandth  of a Preferred
Share,  which may, at the  election of the Company,  be evidenced by  depository
receipts) and in lieu  thereof,  an adjustment in cash will be made based on the
market price of the  Preferred  Shares on the last trading day prior to the date
of exercise.

     At any time prior to the time any Person becomes an Acquiring  Person,  the
Board of  Directors  of the Company  may redeem the Rights in whole,  but not in
part, at a price of $0.01 per Right (the "REDEMPTION  PRICE"). The redemption of
the  Rights  may be made  effective  at such  time,  on such basis and with such
conditions  as the Board of  Directors  in its sole  discretion  may  establish.
Immediately upon any redemption of the Rights,  the right to exercise the Rights
will  terminate  and the only right of the  holders of Rights will be to receive
the Redemption Price.

     The terms of the Rights may be  amended  by the Board of  Directors  of the
Company  without the consent of the holders of the Rights,  except that from and
after such time as any person becomes an Acquiring  Person no such amendment may
adversely  affect the  interests  of the  holders of the Rights  (other than the
Acquiring Person and its Affiliates and Associates).

     Until a Right is  exercised,  the  holder  thereof,  as such,  will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

     The Rights  Agreement,  dated as of March 4, 1998  between  the Company and
Continental  Stock  Transfer & Trust  Company,  as Rights Agent,  specifying the
terms of the Rights and including  the form of the  Certificate  of  Designation
setting  forth  the  terms of the  Preferred  Shares as an  exhibit  thereto  is
attached  hereto as an exhibit  and is  incorporated  herein by  reference.  The
foregoing description of the Rights is qualified in its entirety by reference to
such exhibit.
<PAGE>   5


Item 2.        Exhibits.

1.             Rights  Agreement,  dated  as of March 4,  1998  between  Applied
               Science and  Technology,  Inc. and  Continental  Stock Transfer &
               Trust  Company,   which  includes  the  form  of  Certificate  of
               Designation  setting  forth  the  terms  of the  Series  A Junior
               Participating Preferred Stock, $0.01 par value, as Exhibit A, the
               form of Right  Certificate as Exhibit B and the Summary of Rights
               to Purchase  Series A Junior  Participating  Preferred  Shares as
               Exhibit  C.  Pursuant  to the  Rights  Agreement,  printed  Right
               Certificates  will not be  mailed  until  as soon as  practicable
               after the  earliest  of the tenth day after  public  announcement
               that a person or group has acquired  beneficial  ownership of the
               Threshold Amount (as defined in the Rights  Agreement) or more of
               the Common Shares,  the tenth business day (or such later date as
               may be determined  by action of the Board of  Directors)  after a
               person  commences,  or announces  its  intention  to commence,  a
               tender offer or exchange  offer the  consummation  of which would
               result in the  beneficial  ownership  by a person or group of the
               Threshold  Amount  or  more of the  Common  Shares  or the  tenth
               business  day  after  the  Board  of  Directors  of  the  Company
               determines that a person is an Aquiring Person.
<PAGE>   6


                                    SIGNATURE

     Pursuant to the  requirements of Section 12 of the Securities  Exchange Act
of 1934, the registrant has duly caused this registration statement to be signed
on its behalf by the undersigned, thereunto duly authorized.

Dated:  March  4, 1998

                                            APPLIED SCIENCE AND TECHNOLOGY, INC.

                                            By: /s/ Richard S. Post, Ph.D.
                                                --------------------------
                                                    Richard S. Post, Ph.D.
                                                    President
<PAGE>   7




                                  EXHIBIT INDEX


EXHIBIT NO.
PAGE                               DESCRIPTION


99.1           Rights  Agreement,  dated as of March 4,  1998,  between  Applied
               Science and  Technology,  Inc. and  Continental  Stock Transfer &
               Trust  Company,   which  includes  the  form  of  Certificate  of
               Designation  setting  forth  the  terms  of the  Series  A Junior
               Participating Preferred Stock, $0.01 par value, as Exhibit A, the
               form of Right  Certificate as Exhibit B and the Summary of Rights
               to Purchase  Series A Junior  Participating  Preferred  Shares as
               Exhibit  C.  Pursuant  to the  Rights  Agreement,  printed  Right
               Certificates  will not be  mailed  until  as soon as  practicable
               after the  earliest  of the tenth day after  public  announcement
               that a person or group has acquired  beneficial  ownership of the
               Threshold Amount (as defined in the Rights  Agreement) or more of
               the Common Shares,  the tenth business day (or such later date as
               may be determined  by action of the Board of  Directors)  after a
               person  commences,  or announces  its  intention  to commence,  a
               tender offer or exchange  offer the  consummation  of which would
               result in the  beneficial  ownership  by a person or group of the
               Threshold  Amount  or  more of the  Common  Shares  or the  tenth
               business  day  after  the  Board  of  Directors  of  the  Company
               determines that a person is an Aquiring Person.

<PAGE>   1

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



                      APPLIED SCIENCE AND TECHNOLOGY, INC.


                                       and


                   CONTINENTAL STOCK TRANSFER & TRUST COMPANY



                                RIGHTS AGREEMENT



                           Dated as of March 4 , 1998




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


<PAGE>   2


<TABLE>
<CAPTION>
                                TABLE OF CONTENTS
                                -----------------
                                                                                                               PAGE
                                                                                                               ----
<S>                                                                                                            <C>
Section  1. CERTAIN DEFINITIONS...................................................................................1


Section  2. APPOINTMENT OF RIGHTS AGENT...........................................................................5


Section  3. ISSUE OF RIGHT CERTIFICATES...........................................................................5


Section  4. FORM OF RIGHT CERTIFICATES............................................................................7


Section  5. COUNTERSIGNATURE AND REGISTRATION.....................................................................8


Section  6. TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHT CERTIFICATES;
              MUTILATED, DESTROYED, LOST OR STOLEN RIGHT CERTIFICATES.............................................8


Section  7. EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF RIGHTS.........................................9


Section  8. CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES...................................................11


Section  9. STATUS AND AVAILABILITY OF PREFERRED SHARES..........................................................11


Section  10. PREFERRED SHARES RECORD DATE........................................................................12


Section  11. ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR NUMBER OF RIGHTS..................................13


Section  12. CERTIFICATE OF ADJUSTMENT...........................................................................22


Section  13. CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR EARNING POWER................................23


Section  14. FRACTIONAL RIGHTS AND FRACTIONAL SHARES.............................................................24


Section  15. RIGHTS OF ACTION....................................................................................26


Section  16. AGREEMENT OF RIGHT HOLDERS..........................................................................26


Section  17. RIGHT CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER...................................................27


Section  18. CONCERNING THE RIGHTS AGENT.........................................................................27


Section  19. MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT...........................................28


Section  20. DUTIES OF RIGHTS AGENT..............................................................................29


Section  21. CHANGE OF RIGHTS AGENT..............................................................................31


Section  22. ISSUANCE OF NEW RIGHT CERTIFICATES..................................................................32


Section  23. REDEMPTION..........................................................................................33


Section  24. EXCHANGE............................................................................................33
</TABLE>


                                       i
<PAGE>   3
<TABLE>
<S>                                                                                                            <C>
Section  25. NOTICE OF CERTAIN EVENTS............................................................................35


Section  26. NOTICES.............................................................................................37


Section  27. SUPPLEMENTS AND AMENDMENTS..........................................................................37


Section  28. SUCCESSORS..........................................................................................38


Section  29. BENEFITS OF THIS AGREEMENT..........................................................................38


Section  30. SEVERABILITY........................................................................................38


Section  31. GOVERNING LAW.......................................................................................38


Section  32. COUNTERPARTS........................................................................................38


Section  33. DESCRIPTIVE HEADINGS................................................................................39


Section  34. ADMINISTRATION......................................................................................39


Exhibit  A.  Certificate of Designations of Series A Junior Participating Preferred Stock.......................A-1


Exhibit  B.  Form of Right Certificate..........................................................................B-1


Exhibit  C.  Summary of Rights to Purchase Preferred Shares.....................................................C-1
</TABLE>





                                       ii

<PAGE>   4


                                RIGHTS AGREEMENT
                Agreement, dated as of March 4, 1998, between Applied Science
and Technology, Inc., a Delaware corporation (the "COMPANY"), and Continental
Stock Transfer & Trust Company (the "RIGHTS AGENT").

                The Board of Directors of the Company has authorized and
declared a dividend of one preferred share purchase right (a "RIGHT") for each
share of Common Stock, par value $0.01 per share, of the Company (a "COMMON
SHARE") outstanding on the close of business on March 4, 1998 (the "RECORD
DATE") and has authorized the issuance of one Right with respect to each
additional Common Share that shall become outstanding between the Record Date
and the earlier of the Distribution Date, the Expiration Date or the Final
Expiration Date (as such terms are defined in Sections 3 and 7 hereof), each
Right representing the right to purchase one one-thousandth of a Preferred
Share, as hereinafter defined, or such different amount and/or kind of
securities as shall be hereinafter provided.

                Accordingly, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

                Section 1. For purposes of this  Agreement,  the following terms
have the meanings indicated:

                "ACQUIRING PERSON" shall mean any Person who or which, together
with all Affiliates and Associates of such Person, shall be the Beneficial Owner
of 15% or more of the Common Shares of the Company then outstanding, but shall
not include (i) the Company, (ii) any Subsidiary of the Company, (iii) any
employee benefit plan of the Company or any Subsidiary of the Company, (iv) any
entity holding Common Shares for or pursuant to the terms of any such employee
benefit plan, or (v) the Exempt Person. Notwithstanding the foregoing, (1) no
Person shall become an "Acquiring Person" as the result of an acquisition of
Common Shares by the Company which, by reducing the number of shares
outstanding, increases the proportionate number of shares beneficially owned by
such Person to 15% (20% in the case of the Exempt Person) or


                                       1



<PAGE>   5

more of the Common Shares of the Company then outstanding; PROVIDED, HOWEVER,
that if a Person shall so become the Beneficial Owner of 15% (20% in the case of
the Exempt Person) or more of the Common Shares of the Company then outstanding
by reason of an acquisition of Common Shares by the Company and shall, after
such share purchases by the Company, become the Beneficial Owner of an
additional 1% of the outstanding Common Shares of the Company, then such Person
shall be deemed to be an "Acquiring Person"; and (2) if the Board of Directors
of the Company determines in good faith that a Person who would otherwise be an
"Acquiring Person," as defined pursuant to the foregoing provisions of this
paragraph, has become such inadvertently, and such Person divests as promptly as
practicable a sufficient number of Common Shares so that such Person would no
longer be an "Acquiring Person," as defined pursuant to the foregoing provisions
of this paragraph, then such Person shall not be deemed to have become an
"Acquiring Person" for any purposes of this Agreement.

                "AFFILIATE" and "ASSOCIATE" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Securities Exchange Act of 1934, as amended (the "EXCHANGE ACT"), as in
effect on the date of this Agreement.

                A Person shall be deemed the "BENEFICIAL OWNER" of and shall be
deemed to "BENEFICIALLY OWN" any securities:

                         (i) which such Person or any of such Person's
Affiliates or Associates beneficially owns, directly or indirectly;

                         (ii) which such Person or any of such Person's
Affiliates or Associates has (A) the right to acquire (whether such right is
exercisable immediately or only after the passage of time) pursuant to any
agreement, arrangement or understanding (other than customary agreements with
and between underwriters and selling group members with respect to a bona fide
public offering of securities), written or otherwise, or upon the exercise of
conversion rights, exchange rights, rights (other than the Rights), warrants or
options, or otherwise; PROVIDED, HOWEVER, that a Person shall not be deemed to
be the Beneficial Owner of, or to beneficially own, securities tendered pursuant
to a tender or exchange offer made pursuant to, and in accordance with, the
applicable rules and regulations promulgated under the Exchange Act by or on
behalf of such Person or any of such Person's Affiliates or Associates until
such tendered securities are accepted for purchase or exchange; or (B) the right
to vote pursuant to any agreement, arrangement or understanding; PROVIDED,
HOWEVER, that a Person shall not be deemed the Beneficial Owner of, or to
beneficially own, any security if the agreement, arrangement or understanding to
vote such security (1) arises solely from a revocable proxy or consent given to
such Person in response to a public proxy or consent solicitation made pursuant
to, and in accordance with, the


                                       2



applicable rules and regulations promulgated under the Exchange Act and (2) is
not also then reportable on Schedule 13D under the Exchange Act (or any
comparable or successor report); or

                         (iii) which are beneficially owned, directly or
indirectly, by any other Person with which such Person or any of such Person's
Affiliates or Associates has any agreement, arrangement or understanding (other
than customary agreements with and between underwriters and selling group
members with respect to a bona fide public offering of securities), written or
otherwise, for the purpose of acquiring, holding, voting (except to the extent
contemplated by the proviso to section (B) of the immediately preceding
paragraph (ii)) or disposing of any securities of the Company.

                Notwithstanding anything in this definition of Beneficial
Ownership to the contrary, the phrase "then outstanding," when used with
reference to a Person's Beneficial Ownership of securities of the Company, shall
mean the number of such securities then issued and outstanding together with the
number of such securities not then actually issued and outstanding which such
Person would be deemed to own beneficially hereunder.

                "BUSINESS DAY" shall mean any day other than a Saturday, Sunday,
or a day on which banking institutions in the State of New York are authorized
or obligated by law or executive order to close.

                "CLOSE OF BUSINESS" on any given date shall mean 5:00 P.M.,
Boston, Massachusetts time, on such date; PROVIDED, HOWEVER, that if such date
is not a Business Day it shall mean 5:00 P.M., Boston, Massachusetts time, on
the next succeeding Business Day.


                                       3
<PAGE>   6

                "COMMON SHARES" when used with reference to the Company shall
mean the shares of common stock, par value $0.01 per share, of the Company.
"Common Shares" when used with reference to any Person other than the Company
shall mean the capital stock (or equity interest) with the greatest voting power
of such other Person or, if such other Person is a Subsidiary of another Person,
the Person or Persons which ultimately control such first-mentioned Person.

                "COMMON STOCK EQUIVALENTS" shall have the meaning set forth in
section 11(a)(iii)(B)(3).

                "CURRENT VALUE" shall have the meaning set forth in Section
11(a)(iii)(A)(1) hereof.

                "DISTRIBUTION DATE" shall have the meaning set forth in Section
3 hereof.

                "EQUIVALENT PREFERRED SHARES" shall have the meaning set forth
in Section 11(b).

                "EXCHANGE RATIO" shall have the meaning set forth in Section
24(a).

                "EXEMPT PERSON" shall mean Kopp Investment Advisors, Inc.,
together with its Affiliates, including but not limited to Kopp Holding Company
and Leroy C. Kopp, so long as it, with its Affiliates, does not beneficially own
20% or more of the Common Shares of the Company then outstanding.

                "FINAL EXPIRATION DATE" shall mean December 31, 2007.

                "PERSON" shall mean any individual, firm, corporation,
partnership, limited partnership, limited liability partnership, business trust,
limited liability company, unincorporated association or other entity, and shall
include any successor (by merger or otherwise) of such entity.

                "PURCHASE PRICE" shall have the meaning set forth in Section
7(b).

                "PREFERRED SHARES" shall mean shares of Series A Junior
Participating Preferred Stock, par value $0.01 per share, of the Company.

                "REDEMPTION DATE" shall mean the date on which the Rights are
redeemed as provided in Section 23 hereof.

                "RIGHT CERTIFICATE" shall mean a certificate evidencing a Right
in substantially the form of Exhibit B hereto.

                "SECTION 11(A)(II) TRIGGER DATE" shall have the meaning set
forth in Section 11(a)(iii) hereof.


                                       4

<PAGE>   7

                "SHARES ACQUISITION DATE" shall mean the earlier of the date of
(i) the public announcement by the Company or an Acquiring Person that an
Acquiring Person has become such or (ii) the public disclosure of facts by the
Company or an Acquiring Person indicating that an Acquiring Person has become
such.

                "SPREAD" shall have the meaning set forth in Section
11(a)(iii)(A)(2) hereof.

                "SUBSIDIARY" of any Person shall mean any Person of which a
majority of the voting power of the voting equity securities or equity interest
is owned, directly or indirectly, by such Person.

                "SUBSTITUTION PERIOD" shall have the meaning set forth in
Section 11(a)(iii) hereof.

                "SUMMARY OF RIGHTS" shall mean the Summary of Rights to Purchase
Preferred Shares in substantially the form of Exhibit C hereto.

                Section 2. APPOINTMENT OF RIGHTS AGENT. The Company hereby
appoints the Rights Agent to act as agent for the Company and the holders of the
Rights (who, in accordance with Section 3 hereof, shall prior to the
Distribution Date also be the holders of the Common Shares) in accordance with
the terms and conditions hereof, and the Rights Agent hereby accepts such
appointment. The Company may from time to time appoint such co-Rights Agents as
it may deem necessary or desirable.

                Section 3. ISSUE OF RIGHT CERTIFICATES

                         (a) Until the earlier of (i) the tenth day after the
Shares Acquisition Date or (ii) the tenth Business Day (or such later date as
may be determined by action of the Board of Directors prior to such time as any
Person becomes an Acquiring Person) after the date of the commencement by any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan of the Company or of any Subsidiary of the Company, any entity
holding Common Shares for or pursuant to the terms of any such plan, or the
Exempt Person) of, or of the first public announcement of the intention of any
Person (other than any of the Persons referred to in the preceding
parenthetical) to commence, a tender or exchange offer the consummation of which
would result in any Person becoming the Beneficial Owner of Common Shares
aggregating 


                                       5


<PAGE>   8

15% or more of the then outstanding Common Shares (such date being herein
referred to as the "DISTRIBUTION DATE"), (x) the Rights will be evidenced
(subject to the provisions of Section 3(b) hereof) by the certificates for
Common Shares registered in the names of the holders thereof (which certificates
shall also be deemed to be Right Certificates) and not by separate Right
Certificates, and (y) the right to receive Right Certificates will be
transferable only in connection with the transfer of Common Shares. As soon as
practicable after the Distribution Date, the Company will prepare and execute,
the Rights Agent will countersign, and the Company will send or cause to be sent
(and the Rights Agent will, if requested, send) by first-class, insured,
postage-prepaid mail, to each record holder of Common Shares as of the Close of
Business on the Distribution Date, at the address of such holder shown on the
records of the Company, a Right Certificate evidencing one Right for each Common
Share so held. As of the Distribution Date, the Rights will be evidenced solely
by such Right Certificates.

                         (b) On the Record Date, or as soon as practicable
thereafter, the Company will send a copy of the Summary of Rights by
first-class, postage-prepaid mail, to each record holder of Common Shares as of
the Close of Business on the Record Date, at the address of such holder shown on
the records of the Company. With respect to certificates for Common Shares
outstanding as of the Record Date, until the Distribution Date, the Rights will
be evidenced by such certificates registered in the names of the holders thereof
together with a copy of the Summary of Rights attached thereto. Until the
Distribution Date (or the earlier of the Redemption Date or the Final Expiration
Date), the surrender for transfer of any certificate for Common Shares
outstanding on the Record Date, with or without a copy of the Summary of Rights
attached thereto, shall also constitute the transfer of the Rights associated
with the Common Shares evidenced thereby.

                         (c) Certificates for Common Shares which become
outstanding (including, without limitation, reacquired Common Shares referred to
in the last sentence of this paragraph (c)) after the Record Date but prior to
the earliest of the Distribution Date, the Redemption Date or the Final
Expiration Date shall have impressed on, printed on, written on or otherwise
affixed to them the following legend:


                                       6
<PAGE>   9

                This certificate also evidences and entitles the holder hereof
                to certain Rights as set forth in a Rights Agreement between
                Applied Science and Technology, Inc. and Continental Stock
                Transfer & Trust Company, as Rights Agent, dated as of March 4,
                1998 (the "Rights Agreement"), the terms of which are hereby
                incorporated herein by reference and a copy of which is on file
                at the principal executive offices of Applied Science and
                Technology, Inc. Under certain circumstances, as set forth in
                the Rights Agreement, such Rights will be evidenced by separate
                certificates and will no longer be evidenced by this
                certificate. Applied Science and Technology, Inc. will mail to
                the holder of this certificate a copy of the Rights Agreement
                without charge after receipt of a written request therefor.
                Under certain circumstances, Rights that are or were acquired or
                beneficially owned by Acquiring Persons (as defined in the
                Rights Agreement) may become null and void.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
certificates shall be evidenced by such certificates alone, and the surrender
for transfer of any such certificate shall also constitute the transfer of the
Rights associated with the Common Shares represented thereby. In the event that
the Company purchases or acquires any Common Shares after the Record Date but
prior to the Distribution Date, any Rights associated with such Common Shares
shall be deemed canceled and retired so that the Company shall not be entitled
to exercise any Rights associated with the Common Shares which are no longer
outstanding.

                SECTION 4. FORM OF RIGHT CERTIFICATES. The Right Certificates
(and the forms of election to purchase Preferred Shares and of assignment to be
printed on the reverse thereof) shall be substantially the same as Exhibit B
hereto and may have such marks of identification or designation and such
legends, summaries or endorsements printed thereon as the Company may deem
appropriate and as are not inconsistent with the provisions of this Agreement,
or as may be required to comply with any applicable law or with any rule or
regulation made pursuant thereto or with any rule or regulation of any stock
exchange on which the Rights may from time to time be listed, or to conform to
usage. Subject to the other provisions of this Agreement, the Right Certificates
shall entitle the holders thereof to purchase such number of one one-
thousandths of a Preferred Share as shall be set forth therein at the Purchase
Price, but the number of one one-



                                       7


<PAGE>   10

thousandths of a Preferred Share and the Purchase Price shall be subject to
adjustment as provided herein.

                SECTION 5. COUNTERSIGNATURE AND REGISTRATION. The Right
Certificates shall be executed on behalf of the Company by its Chairman of the
Board, its Chief Executive Officer, its President, any of its Vice Presidents,
or its Treasurer, either manually or by facsimile signature, shall have affixed
thereto the Company's seal or a facsimile thereof, and shall be attested by the
Secretary or any Assistant Secretary of the Company, either manually or by
facsimile signature. The Right Certificates shall be countersigned by the Rights
Agent and shall not be valid for any purpose unless so countersigned, either
manually or by facsimile. In case any officer of the Company who shall have
signed any of the Right Certificates shall cease to be such officer of the
Company before countersignature by the Rights Agent and issuance and delivery by
the Company, such Right Certificates, nevertheless, may be countersigned by the
Rights Agent and issued and delivered by the Company with the same force and
effect as though the person who signed such Right Certificates had not ceased to
be such officer of the Company; and any Right Certificate may be signed on
behalf of the Company by any person who, at the actual date of the execution of
such Right Certificate, shall be a proper officer of the Company to sign such
Right Certificate, although at the date of the execution of this Rights
Agreement any such person was not such an officer.

                Following the Distribution Date, the Rights Agent will keep or
cause to be kept, at its principal office, books for registration of the
transfer of the Right Certificates issued hereunder. Such books shall show the
names and addresses of the respective holders of the Right Certificates, the
number of Rights evidenced on its face by each of the Right Certificates and the
date of each of the Right Certificates.

                Section 6. TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHT
CERTIFICATES; MUTILATED, DESTROYED, LOST OR STOLEN RIGHT CERTIFICATES. Subject
to the provisions of Section 14 hereof, at any time after the Close of Business
on the Distribution Date, and at or prior to the Close of Business on the
earlier of the Redemption Date or the Final Expiration Date, any Right
Certificate or Right Certificates (other than Right Certificates representing
Rights that have


                                       8
<PAGE>   11

become void pursuant to Section 11(a)(ii) hereof or that have been exchanged
pursuant to Section 24 hereof) may be transferred, split up, combined or
exchanged for another Right Certificate or Right Certificates, entitling the
registered holder to purchase a like number of one one-thousandths of a
Preferred Share as the Right Certificate or Right Certificates surrendered then
entitled such holder to purchase. Any registered holder desiring to transfer,
split up, combine or exchange any Right Certificate or Right Certificates shall
make such request in writing delivered to the Rights Agent, and shall surrender
the Right Certificate or Right Certificates to be transferred, split up,
combined or exchanged at the principal office of the Rights Agent. Thereupon the
Rights Agent shall countersign and deliver to the person entitled thereto a
Right Certificate or Right Certificates, as the case may be, as so requested.
The Company may require payment of a sum sufficient for any tax or governmental
charge that may be imposed in connection with any transfer, split up,
combination or exchange of Right Certificates.

                Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Right Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to them, and, at the Company's request,
reimbursement to the Company and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Right Certificate if mutilated, the Company will make and deliver a new
Right Certificate of like tenor to the Rights Agent for delivery to the
registered holder in lieu of the Right Certificate so lost, stolen, destroyed or
mutilated.

                Section 7. EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE
OF RIGHTS.

                         (a) The registered holder of any Right Certificate
(other than a holder whose Rights have become void pursuant to Section 11(a)(ii)
hereof or have been exchanged pursuant to Section 24 hereof) may exercise the
Rights evidenced thereby in whole or in part at any time after the Distribution
Date upon surrender of the Right Certificate, with the form of election to
purchase on the reverse side thereof duly executed, to the Rights Agent at its
principal office, together with payment of the Purchase Price for each one
one-thousandth of a Preferred Share as to


                                       9
<PAGE>   12

which the Rights are exercised, at or prior to the earliest of (i) the Close of
Business on the Final Expiration Date, (ii) the Redemption Date, or (iii) the
time at which such Rights are exchanged as provided in Section 24 hereof.

                         (b) The purchase price for each one one-thousandth of a
Preferred Share to be purchased upon the exercise of a Right shall initially be
par value $70.00 per share (the "PURCHASE PRICE"), shall be subject to
adjustment from time to time as provided in Sections 11 and 13 hereof and shall
be payable in lawful money of the United States of America in accordance with
paragraph (c) below.

                         (c) Upon receipt of a Right Certificate representing
exercisable Rights, with the form of election to purchase and certificate duly
executed, accompanied by payment of the Purchase Price for the number of one
one-thousandths of a Preferred Share to be purchased and an amount equal to any
applicable transfer tax required to be paid by the holder of such Right
Certificate in accordance with Section 9 hereof by cash, certified check,
cashier's check or money order payable to the order of the Company, the Rights
Agent shall thereupon promptly (i) (A) requisition from any transfer agent of
the Preferred Shares certificates for the number of one one-thousandths of a
Preferred Share to be purchased and the Company hereby irrevocably authorizes
its transfer agent to comply with all such requests, or (B) requisition from any
depository agent for the Preferred Shares depository receipts representing such
number of one one-thousandths of a Preferred Share as are to be purchased (in
which case certificates for the Preferred Shares represented by such receipts
shall be deposited by the transfer agent with the depository agent) and the
Company hereby directs the depository agent to comply with such request, (ii)
when appropriate, requisition from the Company the amount of cash to be paid in
lieu of issuance of fractional Preferred Shares in accordance with Section 14
hereof, (iii) after receipt of such certificates or depository receipts, cause
the same to be delivered to or upon the order of the registered holder of such
Right Certificate, registered in such name or names as may be designated by such
holder and (iv) when appropriate, after receipt, deliver such cash to or upon
the order of the registered holder of such Right Certificate.

                                       10
<PAGE>   13

                         (d) In case the registered holder of any Right
Certificate shall exercise less than all the Rights evidenced thereby, a new
Right Certificate evidencing Rights equivalent to the Rights remaining
unexercised shall be issued by the Rights Agent to the registered holder of such
Right Certificate or to his duly authorized assigns, subject to the provisions
of Section 14 hereof.

                         (e) Notwithstanding anything in this Agreement to the
contrary, neither the Rights Agent nor the Company shall be obligated to
undertake any action with respect to a registered holder upon the occurrence of
any purported exercise as set forth in this Section 7 unless such registered
holder shall have (i) completed and signed the certificate following the form of
election to purchase set forth on the reverse side of the Right Certificate
surrendered for such exercise and (ii) provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company shall reasonably request.

                SECTION 8. CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES.
All Right Certificates surrendered for the purpose of exercise, transfer, split
up, combination or exchange shall, if surrendered to the Company or to any of
its agents, be delivered to the Rights Agent for cancellation or in canceled
form, or, if surrendered to the Rights Agent, shall be canceled by it, and no
Right Certificates shall be issued in lieu thereof except as expressly permitted
by any of the provisions of this Rights Agreement. The Company shall deliver to
the Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Right Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof. The Rights Agent shall deliver
all canceled Right Certificates to the Company, or shall, at the written request
of the Company, destroy such canceled Right Certificates, and in such case shall
deliver a certificate of destruction thereof to the Company.

                Section 9. STATUS AND AVAILABILITY OF PREFERRED SHARES.

                         (a) The Company covenants and agrees that it will take
all such action as may be necessary to ensure that all Preferred Shares
delivered upon exercise of Rights





                                       11
<PAGE>   14

shall, at the time of delivery of the certificates for such Preferred Shares
(subject to payment of the Purchase Price), be duly and validly authorized and
issued and fully paid and non-assessable shares.

                         (b) The Company further covenants and agrees that it
will pay when due and payable any and all federal and state transfer taxes and
charges which may be payable in respect of the issuance or delivery of the Right
Certificates or of any Preferred Shares upon the exercise of Rights. The Company
shall not, however, be required to pay any transfer tax which may be payable in
respect of any transfer or delivery of Right Certificates to a person other
than, or the issuance or delivery of certificates or depository receipts for the
Preferred Shares in a name other than that of, the registered holder of the
Right Certificate evidencing Rights surrendered for exercise or to issue or to
deliver any certificates or depository receipts for Preferred Shares upon the
exercise of any Rights until any such tax shall have been paid (any such tax
being payable by the holder of such Right Certificate at the time of surrender)
or until it has been established to the Company's reasonable satisfaction that
no such tax is due.

                         (c) The Company covenants and agrees that it will cause
to be reserved and kept available, out of its authorized and unissued Preferred
Shares or any Preferred Shares held in its treasury, the number of Preferred
Shares that will be sufficient to permit the exercise in full of all outstanding
Rights in accordance with Section 7 hereof.

                SECTON 10. PREFERRED SHARES RECORD DATE. Each person in whose
name any certificate for Preferred Shares is issued upon the exercise of Rights
shall for all purposes be deemed to have become the holder of record of the
Preferred Shares represented thereby on, and such certificate shall be dated,
the date upon which the Right Certificate evidencing such Rights was duly
surrendered and payment of the Purchase Price (and any applicable transfer
taxes) was made. Prior to the exercise of the Rights evidenced thereby, the
holder of a Right Certificate shall not be entitled to any rights of a holder of
Preferred Shares for which the Rights shall be exercisable, including, without
limitation, the right to vote, to receive dividends or other distributions or to
exercise any preemptive rights, and shall not be entitled to receive any notice
of any proceedings of the Company, except as provided herein.


                                       12



<PAGE>   15

                SECTION 11. ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR
NUMBER OF RIGHTS. The Purchase Price, the number of Preferred Shares covered by
each Right and the number of Rights outstanding are subject to adjustment from
time to time as provided in this Section 11.

                         (a)(i) In the event the Company shall at any time after
the date of this Agreement (A) declare a dividend on the Preferred Shares
payable in Preferred Shares, (B) subdivide the outstanding Preferred Shares, (C)
combine the outstanding Preferred Shares into a smaller number of Preferred
Shares or (D) issue any shares of its capital stock in a reclassification of the
Preferred Shares (including any such reclassification in connection with a
consolidation or merger in which the Company is the continuing or surviving
corporation), except as otherwise provided in this Section 11(a), the Purchase
Price in effect at the time of the record date for such dividend or of the
effective date of such subdivision, combination or reclassification, and the
number and kind of shares of capital stock issuable on such date, shall be
proportionately adjusted so that the holder of any Right exercised after such
time shall be entitled to receive the aggregate number and kind of shares of
capital stock which, if such Right had been exercised immediately prior to such
date, he would have owned upon such exercise and been entitled to receive by
virtue of such dividend, subdivision, combination or reclassification; PROVIDED,
HOWEVER, that in no event shall the consideration to be paid upon the exercise
of one Right be less than the aggregate par value of the shares of capital stock
of the Company issuable upon exercise of one Right.

                         (ii) Subject to the following paragraph of this
subparagraph (ii) and to Section 24 of this Agreement, in the event any Person
shall become an Acquiring Person, each holder of a Right shall thereafter have a
right to receive, upon exercise thereof at a price equal to the then current
Purchase Price multiplied by the number of one one-thousandths of a Preferred
Share for which a Right is then exercisable, in accordance with the terms of
this Agreement and in lieu of Preferred Shares, such number of Common Shares of
the Company as shall equal the result obtained by (x) multiplying the then
current Purchase Price by the number of one one-thousandths of a Preferred Share
for which a Right is then exercisable and dividing that product by (y) 50% of
the then current per share market price of the Company's Common Shares
(determined pursuant to


                                       13


<PAGE>   16

Section 11(d) hereof) on the date such Person became an Acquiring Person. In the
event that any Person shall become an Acquiring Person and the Rights shall then
be outstanding, the Company shall not take any action that would eliminate or
diminish the benefits intended to be afforded by the Rights.

                  From and after the occurrence of such an event, any Rights
that are or were acquired or beneficially owned by such Acquiring Person (or any
Associate or Affiliate of such Acquiring Person) on or after the earlier of (x)
the date of such event and (y) the Distribution Date shall be void and any
holder of such Rights shall thereafter have no right to exercise such Rights
under any provision of this Agreement. No Right Certificate shall be issued
pursuant to Section 3 that represents Rights beneficially owned by an Acquiring
Person whose Rights would be void pursuant to the preceding sentence or any
Associate or Affiliate thereof; no Right Certificate shall be issued at any time
upon the transfer of any Rights to an Acquiring Person whose Rights would be
void pursuant to the preceding sentence or any Associate or Affiliate thereof or
to any nominee of such Acquiring Person, Associate or Affiliate; and any Right
Certificate delivered to the Rights Agent for transfer to an Acquiring Person
whose Rights would be void pursuant to the preceding sentence or any Associate
or Affiliate thereof shall be canceled.

                         (iii) In the event that the number of Common Shares
which are authorized by the Company's certificate of incorporation and not
outstanding or subscribed for, or reserved or otherwise committed for issuance
for purposes other than upon exercise of the Rights, are not sufficient to
permit the holder of each Right to purchase the number of Common Shares to which
he would be entitled upon the exercise in full of the Rights in accordance with
the foregoing subparagraph (ii) of paragraph (a) of this Section 11, or should
the Board of Directors so elect, the Company shall: (A) determine the excess of
(1) the value of the Common Shares issuable upon the exercise of a Right
(calculated as provided in the last sentence of this subparagraph (iii))
pursuant to Section 11(a)(ii) hereof (the "CURRENT VALUE") over (2) the Purchase
Price (such excess, the "Spread"), and (B) with respect to each Right, make
adequate provision to substitute for such Common Shares, upon payment of the
applicable Purchase Price, any one or more of the following


                                       14



<PAGE>   17

having an aggregate value determined by the Board of Directors to be equal to
the Current Value: (1) cash, (2) a reduction in the Purchase Price, (3) Common
Shares or other equity securities of the Company (including, without limitation,
shares, or units of shares, of preferred stock which the Board of Directors of
the Company has determined to have the same value as shares of Common Stock
(such shares of preferred stock, "COMMON STOCK EQUIVALENTS")), (4) debt
securities of the Company, or (5) other assets; PROVIDED, HOWEVER, if the
Company shall not have made adequate provision to deliver value pursuant to
clause (B) above within thirty (30) days following the first occurrence of an
event triggering the rights to purchase Common Shares described in Section
11(a)(ii) the "Section 11(a)(ii) Trigger Date"), then the Company shall be
obligated to deliver, upon the surrender for exercise of a Right and without
requiring payment of the Purchase Price, shares of Common Stock (to the extent
available) and then, if necessary, cash, which shares and cash have an aggregate
value equal to the Spread. If the Board of Directors of the Company shall
determine in good faith that it is likely that sufficient additional Common
Shares could be authorized for issuance upon exercise in full of the Rights, the
thirty (30) day period set forth above may be extended to the extent necessary,
but not more than ninety (90) days after the Section 11(a)(ii) Trigger Date, in
order that the Company may seek stockholder approval for the authorization of
such additional shares (such period, as it may be extended, the "SUBSTITUTION
PERIOD"). To the extent that the Company determines that some action need be
taken pursuant to the first and/or second sentences of this Section 11(a)(iii),
the Company (x) shall provide, subject to Section 7(e) hereof and the last
paragraph of Section 11(a)(ii) hereof, that such action shall apply uniformly to
all outstanding Rights, and (y) may suspend the exercisability of the Rights
until the expiration of the Substitution Period in order to seek any
authorization of additional shares and/or to decide the appropriate form of
distribution to be made pursuant to such first sentence and to determine the
value thereof. In the event of any such suspension, the Company shall make a
public announcement, and shall deliver to the Rights Agent a statement, stating
that the exercisability of the Rights has been temporarily suspended. At such
time as the suspension is no longer in effect, the Company shall make another
public announcement, and deliver to the Rights Agent a


                                       15


<PAGE>   18

statement, so stating. For purposes of this Section 11(a)(iii), the value of the
Common Shares shall be the current per share market price (as determined
pursuant to Section 11(d)(i) hereof) of the Common Shares on the Section
11(a)(ii) Trigger Date and the value of any common stock equivalent shall be
deemed to have the same value as the Common Shares on such date.

                         (b) In case the Company shall fix a record date for the
issuance of rights, options or warrants to all holders of Preferred Shares
entitling them (for a period expiring within 45 calendar days after such record
date) to subscribe for or purchase Preferred Shares (or shares having the same
rights, privileges and preferences as the Preferred Shares ("EQUIVALENT
PREFERRED SHARES")) or securities convertible into Preferred Shares or
equivalent preferred shares at a price per Preferred Share or equivalent
preferred share (or having a conversion price per share, if a security
convertible into Preferred Shares or equivalent preferred shares) less than the
then current per share market price of the Preferred Shares (as defined in
Section 11(d)) on such record date, the Purchase Price to be in effect after
such record date shall be adjusted by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of Preferred Shares outstanding on such record date plus the
number of Preferred Shares which the aggregate offering price of the total
number of Preferred Shares and/or equivalent preferred shares so to be offered
(and/or the aggregate initial conversion price of the convertible securities so
to be offered) would purchase at such current market price and the denominator
of which shall be the number of Preferred Shares outstanding on such record date
plus the number of additional Preferred Shares and/or equivalent preferred
shares to be offered for subscription or purchase (or into which the convertible
securities so to be offered are initially convertible); PROVIDED, HOWEVER, that
in no event shall the consideration to be paid upon the exercise of one Right be
less than the aggregate par value of the shares of capital stock of the Company
issuable upon exercise of one Right. In case such subscription price may be paid
in a consideration part or all of which shall be in a form other than cash, the
value of such consideration shall be as determined in good faith by the Board of
Directors of the Company, whose determination shall be described in a statement
filed with the Rights Agent. Preferred Shares owned by or held for the account
of the Company shall not be


                                       16


<PAGE>   19

deemed outstanding for the purpose of any such computation. Such adjustment
shall be made successively whenever such a record date is fixed; and in the
event that such rights, options or warrants are not so issued, the Purchase
Price shall be adjusted to be the Purchase Price which would then be in effect
if such record date had not been fixed.

                         (c) In case the Company shall fix a record date for the
making of a distribution to all holders of the Preferred Shares (including any
such distribution made in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preferred Shares) or subscription rights or warrants (excluding those referred
to in Section 11(b) hereof), the Purchase Price to be in effect after such
record date shall be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the then current per share market price of the Preferred Shares on such
record date, less the fair market value (as determined in good faith by the
Board of Directors of the Company, whose determination shall be described in a
statement filed with the Rights Agent) of the portion of the assets or evidences
of indebtedness so to be distributed or of such subscription rights or warrants
applicable to one Preferred Share and the denominator of which shall be such
current per share market price of the Preferred Shares; PROVIDED, HOWEVER, that
in no event shall the consideration to be paid upon the exercise of one Right be
less than the aggregate par value of the shares of capital stock of the Company
to be issued upon exercise of one Right. Such adjustments shall be made
successively whenever such a record date is fixed; and in the event that such
distribution is not so made, the Purchase Price shall again be adjusted to be
the Purchase Price which would then be in effect if such record date had not
been fixed.

                         (d)(i) For the purpose of any computation hereunder,
the "CURRENT PER SHARE MARKET PRICE" of any security (a "SECURITY" for the
purpose of this Section 11(d)(i)) on any date shall be deemed to be the average
of the daily closing prices per share of such Security for the 30 consecutive
Trading Days (as such term is hereinafter defined) immediately prior to such
date; PROVIDED, HOWEVER, that in the event that the current per share market
price of the Security is


                                       17


<PAGE>   20

determined during a period following the announcement by the issuer of such
Security of (A) a dividend or distribution on such Security payable in shares of
such Security or securities convertible into such shares, or (B) any
subdivision, combination or reclassification of such Security and prior to the
expiration of 30 Trading Days after the ex-dividend date for such dividend or
distribution, or the record date for such subdivision, combination or
reclassification, then, and in each such case, the current per share market
price shall be appropriately adjusted to reflect the current market price per
share equivalent of such Security. The closing price for each day shall be the
last sale price, regular way, or, in case no such sale takes place on such day,
the average of the closing bid and asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities listed or admitted to trading on the New York Stock Exchange or,
if the Security is not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national securities exchange
on which the Security is listed or admitted to trading or, if the Security is
not listed or admitted to trading on any national securities exchange, the last
quoted price or, if not so quoted, the average of the high bid and low asked
prices in the over-the-counter market, as reported by the National Association
of Securities Dealers, Inc. Automated Quotations System ("NASDAQ") or such other
system then in use, or, if on any such date the Security is not quoted by any
such organization, the average of the closing bid and asked prices as furnished
by a professional market maker making a market in the Security selected by the
Board of Directors of the Company. The term "TRADING DAY" shall mean a day on
which the principal national securities exchange on which the Security is listed
or admitted to trading is open for the transaction of business or, if the
Security is not listed or admitted to trading on any national securities
exchange, a Business Day.

                         (ii) For the purpose of any computation hereunder, the
"CURRENT PER SHARE MARKET price" of the Preferred Shares shall be determined in
accordance with the method set forth in Section 11(d)(i). If the Preferred
Shares are not publicly traded, the "current per share market price" of the
Preferred Shares shall be conclusively deemed to be the current per share market
price


                                       18


<PAGE>   21

of the Common Shares as determined pursuant to Section 11(d)(i) (appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof), multiplied by 1000. If neither the Common
Shares nor the Preferred Shares are publicly held or so listed or traded,
"current per share market price" shall mean the fair value per share as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent.

                         (e) No adjustment in the Purchase Price shall be
required unless such adjustment would require an increase or decrease of at
least 1% in the Purchase Price; PROVIDED, HOWEVER, that any adjustments which by
reason of this Section 11(e) are not required to be made shall be carried
forward and taken into account in any subsequent adjustment. All calculations
under this Section 11 shall be made to the nearest cent or to the nearest one
ten-millionth of a Preferred Share or one ten-thousandth of any other share or
security as the case may be. Notwithstanding the first sentence of this Section
11(e), any adjustment required by this Section 11 shall be made no later than
three years from the date of the transaction which requires such adjustment.

                         (f) If as a result of an adjustment made pursuant to
Section 11(a) hereof, the holder of any Right thereafter exercised shall become
entitled to receive any shares of capital stock of the Company other than
Preferred Shares, the number of such other shares so receivable upon exercise of
any Right shall thereafter be subject to adjustment from time to time in a
manner and on terms as nearly equivalent as practicable to the provisions with
respect to the Preferred Shares contained in Section 11(a) through (c),
inclusive, and the provisions of Sections 7, 9, 10 and 13 with respect to the
Preferred Shares shall apply on like terms to any such other shares.

                         (g) All Rights originally issued by the Company
subsequent to any adjustment made to the Purchase Price hereunder shall evidence
the right to purchase, at the adjusted Purchase Price, the number of one
one-thousandths of a Preferred Share purchasable from time to time hereunder
upon exercise of the Rights, all subject to further adjustment as provided
herein.


                                       19


<PAGE>   22

                         (h) Unless the Company shall have exercised its
election as provided in Section 11(i), upon each adjustment of the Purchase
Price as a result of the calculations made in Sections 11(b) and (c), each Right
outstanding immediately prior to the making of such adjustment shall thereafter
evidence the right to purchase, at the adjusted Purchase Price, that number of
one one-thousandths of a Preferred Share (calculated to the nearest one
ten-millionth of a Preferred Share) obtained by (i) multiplying (x) the number
of one one-thousandths of a share covered by a Right immediately prior to this
adjustment by (y) the Purchase Price in effect immediately prior to such
adjustment of the Purchase Price and (ii) dividing the product so obtained by
the Purchase Price in effect immediately after such adjustment of the Purchase
Price.

                         (i) The Company may elect on or after the date of any
adjustment of the Purchase Price to adjust the number of Rights in substitution
for any adjustment in the number of one one-thousandths of a Preferred Share
purchasable upon the exercise of a Right. Each of the Rights outstanding after
such adjustment of the number of Rights shall be exercisable for the number of
one one-thousandths of a Preferred Share for which a Right was exercisable
immediately prior to such adjustment. Each Right held of record prior to such
adjustment of the number of Rights shall become that number of Rights
(calculated to the nearest one hundred-thousandth) obtained by dividing the
Purchase Price in effect immediately prior to adjustment of the Purchase Price
by the Purchase Price in effect immediately after adjustment of the Purchase
Price. The Company shall make a public announcement of its election to adjust
the number of Rights, indicating the record date for the adjustment, and, if
known at the time, the amount of the adjustment to be made. This record date may
be the date on which the Purchase Price is adjusted or any day thereafter, but,
if the Right Certificates have been distributed, shall be at least 10 days later
than the date of the public announcement. If Right Certificates have been
distributed, upon each adjustment of the number of Rights pursuant to this
Section 11(i), the Company shall, as promptly as practicable, cause to be
distributed to holders of record of Right Certificates on such record date Right
Certificates evidencing, subject to Section 14 hereof, the additional Rights to
which such holders shall be entitled as a result of such adjustment, or, at the
option of the Company, shall cause


                                       20


<PAGE>   23

to be distributed to such holders of record in substitution and replacement for
the Right Certificates held by such holders prior to the date of adjustment, and
upon surrender thereof, if required by the Company, new Right Certificates
evidencing all the Rights to which such holders shall be entitled after such
adjustment. Right Certificates to be so distributed shall be issued, executed
and countersigned in the manner provided for herein and shall be registered in
the names of the holders of record of Right Certificates on the record date
specified in the public announcement.

                         (j) Irrespective of any adjustment or change in the
Purchase Price or the number of one one-thousandths of a Preferred Share
issuable upon the exercise of the Rights, the Right Certificates theretofore and
thereafter issued may continue to express the Purchase Price and the number of
one one-thousandths of a Preferred Share which were expressed in the initial
Right Certificates issued hereunder.

                         (k) Before taking any action that would cause an
adjustment reducing the Purchase Price below one one-thousandth of the then par
value of the Preferred Shares issuable upon exercise of the Rights, the Company
shall take any corporate action which may, in the opinion of its counsel, be
necessary in order that the Company may validly and legally issue fully paid and
non-assessable Preferred Shares at such adjusted Purchase Price.

                         (l) In any case in which this Section 11 shall require
that an adjustment in the Purchase Price be made effective as of a record date
for a specified event, the Company may elect to defer until the occurrence of
such event the issuing to the holder of any Right exercised after such record
date of the Preferred Shares and other capital stock or securities of the
Company, if any, issuable upon such exercise over and above the Preferred Shares
and other capital stock or securities of the Company, if any, issuable upon such
exercise on the basis of the Purchase Price in effect prior to such adjustment;
PROVIDED, HOWEVER, that the Company shall deliver to such holder a due bill or
other appropriate instrument evidencing such holder's right to receive such
additional shares upon the occurrence of the event requiring such adjustment.

                         (m) Anything in this Section 11 to the contrary
notwithstanding, the Company shall be entitled to make such reductions in the
Purchase Price, in addition to those


                                       21


<PAGE>   24

adjustments expressly required by this Section 11, as and to the extent that it
in its sole discretion shall determine to be advisable in order that any (i)
consolidation or subdivision of the Preferred Shares, (ii) issuance wholly for
cash of any Preferred Shares at less than the current market price, (iii)
issuance wholly for cash of Preferred Shares or securities which by their terms
are convertible into or exchangeable for Preferred Shares, (iv) dividends on
Preferred Shares payable in Preferred Shares or (v) issuance of any rights,
options or warrants referred to hereinabove in Section 11(b), hereafter made by
the Company to holders of its Preferred Shares shall not be taxable to such
stockholders.

                         (n) In the event that at any time after the date of
this Agreement and prior to the Distribution Date, the Company shall (i) declare
or pay any dividend on the Common Shares payable in Common Shares or (ii) effect
a subdivision, combination or consolidation of the Common Shares (by
reclassification or otherwise other than by payment of dividends in Common
Shares) into a greater or lesser number of Common Shares, then in any such case
(i) the number of one one-thousandths of a Preferred Share purchasable after
such event upon proper exercise of each Right shall be determined by multiplying
the number of one one-thousandths of a Preferred Share so purchasable
immediately prior to such event by a fraction, the numerator of which is the
number of Common Shares outstanding immediately before such event and the
denominator of which is the number of Common Shares outstanding immediately
after such event, and (ii) each Common Share outstanding immediately after such
event shall have issued with respect to it that number of Rights which each
Common Share outstanding immediately prior to such event had issued with respect
to it. The adjustments provided for in this Section 11(n) shall be made
successively whenever such a dividend is declared or paid or such a subdivision,
combination or consolidation is effected.

                SECTION 12. CERTIFICATE OF ADJUSTMENT. Whenever an adjustment is
made as provided in Sections 11 and 13 hereof, the Company shall promptly (a)
prepare a certificate setting forth such adjustment, and a brief statement of
the facts accounting for such adjustment, (b) file with the Rights Agent and
with each transfer agent for the Common Shares or the Preferred Shares a copy of
such certificate and (c) mail a brief summary thereof to each holder of a Right
Certificate



                                       22


<PAGE>   25

in accordance with Section 25 hereof. The Rights Agent shall be fully protected
in relying on any such certificate and on any adjustment therein contained.

                SECTION 13. CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS
OR EARNING POWER. In the event that, at any time after a Person becomes an
Acquiring Person, directly or indirectly, (i) the Company shall consolidate
with, or merge with and into, any other Person, (ii) any Person shall
consolidate with the Company, or merge with and into the Company and the Company
shall be the continuing or surviving corporation of such merger and, in
connection with such merger, all or part of the Common Shares shall be changed
into or exchanged for stock or other securities of any other Person (or the
Company) or cash or any other property, or (iii) the Company shall sell or
otherwise transfer (or one or more of its Subsidiaries shall sell or otherwise
transfer), in one or more transactions, assets or earning power aggregating 50%
or more of the assets or earning power of the Company and its Subsidiaries
(taken as a whole) to any other Person other than the Company or one or more of
its wholly-owned Subsidiaries, then, and in each such case, proper provision
shall be made so that (A) each holder of a Right (except as otherwise provided
herein) shall thereafter have the right to receive, upon the exercise thereof at
a price equal to the then current Purchase Price multiplied by the number of one
one-thousandths of a Preferred Share for which a Right is then exercisable, in
accordance with the terms of this Agreement and in lieu of Preferred Shares,
such number of Common Shares of such other Person (including the Company as
successor thereto or as the surviving corporation) as shall equal the result
obtained by (x) multiplying the then current Purchase Price by the number of one
one-thousandths of a Preferred Share for which a Right is then exercisable and
dividing that product by (y) 50% of the then current per share market price of
the Common Shares of such other Person (determined pursuant to Section 11(d)
hereof) on the date of consummation of such consolidation, merger, sale or
transfer; (B) the issuer of such Common Shares shall thereafter be liable for,
and shall assume, by virtue of such consolidation, merger, sale or transfer, all
the obligations and duties of the Company pursuant to this Agreement; (C) the
term "COMPANY" shall thereafter be deemed to refer to such issuer; and (D) such
issuer shall take such steps (including, but not limited to, the


                                       23


<PAGE>   26

reservation of a sufficient number of its Common Shares in accordance with
Section 9 hereof) in connection with such consummation as may be necessary to
assure that the provisions hereof shall thereafter be applicable, as nearly as
reasonably may be, in relation to the Common Shares thereafter deliverable upon
the exercise of the Rights. The Company covenants and agrees that it shall not
consummate any such consolidation, merger, sale or transfer unless prior thereto
the Company and such issuer shall have executed and delivered to the Rights
Agent a supplemental agreement so providing. The Company shall not enter into
any transaction of the kind referred to in this Section 13 if at the time of
such transaction there are any rights, warrants, instruments or securities
outstanding or any agreements or arrangements which, as a result of the
consummation of such transaction, would eliminate or substantially diminish the
benefits intended to be afforded by the Rights. The provisions of this Section
13 shall similarly apply to successive mergers or consolidations or sales or
other transfers. For purposes hereof, the "EARNING POWER" of the Company and its
Subsidiaries shall be determined in good faith by the Company's Board of
Directors on the basis of the operating earnings of each business operated by
the Company and its Subsidiaries during the three fiscal years preceding the
date of such determination (or, in the case of any business not operated by the
Company or any Subsidiary during three full fiscal years preceding such date,
during the period such business was operated by the Company or any Subsidiary).

                Section 14. FRACTIONAL RIGHTS AND FRACTIONAL SHARES.

                         (a) The Company shall not be required to issue
fractions of Rights or to distribute Right Certificates which evidence
fractional Rights. In lieu of such fractional Rights, there shall be paid to the
registered holders of the Right Certificates with regard to which such
fractional Rights would otherwise be issuable, an amount in cash equal to the
same fraction of the current market value of a whole Right. For the purposes of
this Section 14(a), the current market value of a whole Right shall be the
closing price of the Rights for the Trading Day immediately prior to the date on
which such fractional Rights would have been otherwise issuable. The closing
price for any day shall be the last sale price, regular way, or, in case no such
sale takes place on such day, the average of the closing bid and asked prices,
regular way, in either case as reported in



                                       24



<PAGE>   27

the principal consolidated transaction reporting system with respect to
securities listed or admitted to trading on the NASDAQ National Market System
or, if the Rights are not listed or admitted to trading on the NASDAQ National
Market System, as reported in the principal consolidated transaction reporting
system with respect to securities listed on the principal national securities
exchange on which the Rights are listed or admitted to trading or, if the Rights
are not listed or admitted to trading on any national securities exchange, the
last quoted price or, if not so quoted, the average of the high bid and low
asked prices in the over-the-counter market, as reported by NASDAQ or such other
system then in use or, if on any such date the Rights are not quoted by any such
organization, the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Rights selected by the Board of
Directors of the Company. If on any such date no such market maker is making a
market in the Rights, the fair value of the Rights on such date as determined in
good faith by the Board of Directors of the Company shall be used.

                         (b) The Company shall not be required to issue
fractions of Preferred Shares (other than fractions which are integral multiples
of one one-thousandth of a Preferred Share) upon exercise of the Rights or to
distribute certificates which evidence fractional Preferred Shares (other than
fractions which are integral multiples of one one-thousandth of a Preferred
Share). Fractions of Preferred Shares in integral multiples of one
one-thousandth of a Preferred Share may, at the election of the Company, be
evidenced by depository receipts, pursuant to an appropriate agreement between
the Company and a depository selected by it; PROVIDED, that such agreement shall
provide that the holders of such depository receipts shall have all the rights,
privileges and preferences to which they are entitled as beneficial owners of
the Preferred Shares represented by such depository receipts. In lieu of
fractional Preferred Shares that are not integral multiples of one
one-thousandth of a Preferred Share, the Company shall pay to each registered
holder of Right Certificates at the time such Rights are exercised as herein
provided an amount in cash equal to the same fraction of the current market
value of one Preferred Share as the fraction of one Preferred Share that such
holder would otherwise receive upon the exercise of the aggregate


                                       25



<PAGE>   28

number of rights exercised by such holder. For the purposes of this Section
14(b), the current market value of a Preferred Share shall be the closing price
of a Preferred Share (as determined pursuant to the second sentence of Section
11(d)(i) hereof) for the Trading Day immediately prior to the date of such
exercise.

                         (c) The holder of a Right by the acceptance of the
Right expressly waives any right to receive fractional Rights or fractional
shares upon exercise of a Right (except as provided above).

                SECTION 15. RIGHTS OF ACTION. All rights of action in respect of
this Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Right
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Right Certificate (or, prior to
the Distribution Date, of the Common Shares) may, without the consent of the
Rights Agent or of the holder of any other Right Certificate (or, prior to the
Distribution Date, of the Common Shares), on his own behalf and for his own
benefit, enforce, and may institute and maintain any suit, action or proceeding
against the Company to enforce, or otherwise act in respect of, his right to
exercise the Rights evidenced by such Right Certificate in the manner provided
in such Right Certificate and in this Agreement. Without limiting the foregoing
or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the obligations under, and injunctive relief against actual or threatened
violations of the obligations of any Person subject to, this Agreement.

                SECTION 16. AGREEMENT OF RIGHT HOLDERS. Every holder of a Right,
by accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

                         (a) prior to the Distribution Date, the Rights will be
transferable only in connection with the transfer of the Common Shares;

                                       26
<PAGE>   29

                         (b) after the Distribution Date, the Right Certificates
are transferable only on the registry books maintained by the Rights Agent if
surrendered at the principal office of the Rights Agent, duly endorsed or
accompanied by a proper instrument of transfer with a completed form of
certification; and

                         (c) the Company and the Rights Agent may deem and treat
the person in whose name the Right Certificate (or, prior to the Distribution
Date, the associated Common Shares certificate) is registered as the absolute
owner thereof and of the Rights evidenced thereby (notwithstanding any notations
of ownership or writing on the Right Certificates or the associated Common
Shares certificate made by anyone other than the Company or the Rights Agent)
for all purposes whatsoever, and neither the Company nor the Rights Agent shall
be affected by any notice to the contrary.

                SECTION 17. RIGHT CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER.
No holder, as such, of any Right Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Shares or any
other securities of the Company which may at any time be issuable on the
exercise of the Rights represented thereby nor shall anything contained herein
or in any Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends
or subscription rights, or otherwise, until the Right or Rights evidenced by
such Right Certificate shall have been exercised in accordance with the
provisions hereof.

                SECTION 18. CONCERNING THE RIGHTS AGENT. The Company agrees to
pay to the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this Agreement and the exercise and performance of its duties
hereunder. The Company also agrees to indemnify the Rights Agent for,



                                       27

<PAGE>   30

and to hold it harmless against, any loss, liability, or expense, incurred
without gross negligence, bad faith or willful misconduct on the part of the
Rights Agent, for anything done or omitted by the Rights Agent in connection
with the acceptance and administration of this Agreement, including the costs
and expenses of defending against any claim or liability in connection
therewith.

                  The Rights Agent shall be protected and shall incur no
liability for or in respect of any action taken, suffered or omitted by it in
connection with its administration of this Agreement in reliance upon any Right
Certificate or certificate for Preferred Stock or for other securities of the
Company, instrument of assignment or transfer, power of attorney, endorsement,
affidavit, letter, notice, direction, consent, certificate, statement, or other
paper or document believed by it to be genuine and to be signed, executed and,
where necessary, verified or acknowledged, by the proper person or persons.

                SECTION 19. MERGER OR CHANGE OF NAME OF RIGHTS AGENT. Any
corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the corporate trust
business of the Rights Agent or any successor Rights Agent, shall be the
successor to the Rights Agent under this Agreement without the execution or
filing of any paper or any further act on the part of any of the parties hereto,
provided that such corporation would be eligible for appointment as a successor
Rights Agent under the provisions of Section 21 hereof. In case at the time such
successor Rights Agent shall succeed to the agency created by this Agreement,
any of the Right Certificates shall have been countersigned but not delivered,
any such successor Rights Agent may adopt the countersignature of the
predecessor Rights Agent and deliver such Right Certificates so countersigned;
and in case at that time any of the Right Certificates shall not have been
countersigned, any successor Rights Agent may countersign such Right
Certificates either in the name of the predecessor Rights Agent or in the name
of the successor Rights Agent; and in all such cases such Right Certificates
shall have the full force provided in the Right Certificates and in this
Agreement.


                                       28
<PAGE>   31

                  In case at any time the name of the Rights Agent shall be
changed and at such time any of the Right Certificates shall have been
countersigned but not delivered, the Rights Agent may adopt the countersignature
under its prior name and deliver Right Certificates so countersigned; and in
case at that time any of the Right Certificates shall not have been
countersigned, the Rights Agent may countersign such Right Certificates either
in its prior name or in its changed name; and in all such cases such Right
Certificates shall have the full force provided in the Right Certificates and in
this Agreement. 

                SECTION 20. DUTIES OF RIGHTS AGENT. The Rights Agent undertakes
the duties and obligations expressly set forth in this Agreement and no implied
duties or obligations shall be read into this Agreement against the Rights
Agent. The Rights Agent shall perform those duties and obligations upon the
following terms and conditions, by all of which the Company and the holders of
Right Certificates, by their acceptance thereof, shall be bound:

                         (a) The Rights Agent may consult with legal counsel
(who may be legal counsel for the Company), and the opinion of such counsel
shall be full and complete authorization and protection to the Rights Agent as
to any action taken or omitted by it in good faith and in accordance with such
opinion.

                         (b) Whenever in the performance of its duties under
this Agreement the Rights Agent shall deem it necessary or desirable that any
fact or matter be proved or established by the Company prior to taking or
suffering any action hereunder, such fact or matter (unless other evidence in
respect thereof be herein specifically prescribed) may be deemed to be
conclusively proved and established by a certificate signed by any one of the
Chairman of the Board, the President, a Vice President, the Treasurer or the
Secretary of the Company and delivered to the Rights Agent; and such certificate
shall be full authorization to the Rights Agent for any action taken or suffered
in good faith by it under the provisions of this Agreement in reliance upon such
certificate.

                         (c) The Rights Agent shall be liable hereunder only for
its own gross negligence, bad faith or willful misconduct.

                                       29
<PAGE>   32

                         (d) The Rights Agent shall not be liable for or by
reason of any of the statements of fact or recitals contained in this Agreement
or in the Right Certificates (except as to its countersignature thereof) or be
required to verify the same, but all such statements and recitals are and shall
be deemed to have been made by the Company only.

                         (e) The Rights Agent shall not be under any
responsibility in respect of the validity of this Agreement or the execution and
delivery hereof (except the due execution hereof by the Rights Agent) or in
respect of the validity or execution of any Right Certificate (except its
countersignature thereof); nor shall it be responsible for any breach by the
Company of any covenant or condition contained in this Agreement or in any Right
Certificate; nor shall it be responsible for any adjustment required under the
provisions of Sections 11 or 13 hereof or responsible for the manner, method or
amount of any such adjustment or the ascertaining of the existence of facts that
would require any such adjustment (except with respect to the exercise of Rights
evidenced by Right Certificates after actual notice of any such adjustment); nor
shall it by any act hereunder be deemed to make any representation or warranty
as to the authorization or reservation of any shares of Preferred Stock to be
issued pursuant to this Agreement or any Right Certificate or as to whether any
shares of Preferred Stock will, when so issued, be validly authorized and
issued, fully paid and nonassessable.

                         (f) The Company agrees that it will perform, execute,
acknowledge and deliver or cause to be performed, executed, acknowledged end
delivered all such further and other acts, instruments and assurances as may
reasonably be required by the Rights Agent for the carrying out or performing by
the Rights Agent of the provisions of this Agreement.

                         (g) The Rights Agent is hereby authorized and directed
to accept instructions with respect to the performance of its duties hereunder
from any one of the Chairman of the Board, the President, a Vice President, the
Secretary or the Treasurer of the Company, and to apply to such officers for
advice or instructions in connection with its duties, and it shall not be liable
for any action taken or suffered to be taken by it in good faith in accordance
with instructions of any such officer.


                                       30
<PAGE>   33

                         (h) The Rights Agent and any stockholder, director,
officer or employee of the Rights Agent may buy, sell or deal in any of the
Rights or other securities of the Company or become pecuniarily interested in
any transaction in which the Company may be interested, or contract with or lend
money to the Company or otherwise act as fully and freely as though it were not
Rights Agent under this Agreement. Nothing herein shall preclude the Rights
Agent from acting in any other capacity for the Company or for any other legal
entity.

                         (i) The Rights Agent may execute and exercise any of
the rights or powers hereby vested in it or perform any duty hereunder either
itself or by or through its attorneys or agents, and the Rights Agent shall not
be answerable or accountable for any act, default, neglect or misconduct of any
such attorneys or agents or for any loss to the Company resulting from any such
act, default, neglect or misconduct, provided reasonable care was exercised in
the selection and continued employment thereof.

                SECTION 21. CHANGE OF RIGHTS AGENT. The Rights Agent or any
successor Rights Agent may resign and be discharged from its duties under this
Agreement upon 30 days' notice in writing mailed to the Company and to each
transfer agent of the Common Shares and the Preferred Stock by registered or
certified mail, and to the holders of the Right Certificates by first-class
mail. The Company may remove the Rights Agent or any successor Rights Agent upon
30 days' notice in writing, mailed to the Rights Agent or successor Rights
Agent, as the case may be, and to each transfer agent of the Common Shares and
the Preferred Stock by registered or certified mail, and to the holders of the
Right Certificates by first-class mail. If the Rights Agent shall resign or be
removed or shall otherwise become incapable of acting, the Company shall appoint
a successor to the Rights Agent. If the Company shall fail to make such
appointment within a period of 30 days after giving notice of such removal or
after it has been notified in writing of such resignation or incapacity by the
resigning or incapacitated Rights Agent or by the holder of a Right Certificate
(who shall, with such notice, submit his Right Certificate for inspection by the
Company), then the registered holder of any Right Certificate may apply to any
court of competent jurisdiction for the appointment of a new Rights Agent. Any
successor Rights Agent, whether appointed by the



                                       31

<PAGE>   34

Company or by such a court, shall be a corporation organized and doing business
under the laws of the United States or of any state of the United States, in
good standing, having an office in the State of California which is authorized
under such laws to exercise corporate trust powers and is subject to supervision
or examination by federal or state authority and which has at the time of its
appointment as Rights Agent a combined capital and surplus of at least $100
million. After appointment, the successor Rights Agent shall be vested with the
same powers, rights, duties and responsibilities as if it had been originally
named as Rights Agent without further act or deed; but the predecessor Rights
Agent shall deliver and transfer to the successor Rights Agent any property at
the time held by it hereunder, and execute and deliver any further assurance,
conveyance, act or deed necessary for the purpose. Not later than the effective
date of any such appointment the Company shall file notice thereof in writing
with the predecessor Rights Agent and each transfer agent of the Common Shares
and the Preferred Stock, and mail a notice thereof in writing to the registered
holders of the Right Certificates. Failure to give any notice provided for in
this Section 21, however, or any defect therein, shall not affect the legality
or validity of the resignation or removal of the Rights Agent or the appointment
of the successor Rights Agent, as the case may be.

                SECTION 22. ISSUANCE OF NEW RIGHTS CERTIFICATES. Notwithstanding
any of the provisions of this Agreement or of the Rights to the contrary, the
Company may, at its option, issue new Right Certificates evidencing Rights in
such form as may be approved by its Board of Directors to reflect any adjustment
or change in the Purchase Price and the number or kind or class of shares or
other securities or property purchasable under the Right Certificates made in
accordance with the provisions of this Agreement.



                                       32
<PAGE>   35

                Section 23. REDEMPTION

                         (a) The Board of Directors of the Company may, at its
option, at any time prior to such time as any Person becomes an Acquiring
Person, redeem all but not less than all the then outstanding Rights at a
redemption price of $0.01 per Right, appropriately adjusted to reflect any stock
split, stock dividend or similar transaction occurring after the date hereof
(such redemption price being hereinafter referred to as the "REDEMPTION PRICE").
The redemption of the Rights by the Board of Directors may be made effective at
such time, on such basis and subject to such conditions as the Board of
Directors in its sole discretion may establish.

                         (b) Immediately upon the action of the Board of
Directors of the Company ordering the redemption of the Rights pursuant to
paragraph (a) of this Section 23, and without any further action and without any
notice, the right to exercise the Rights will terminate and the only right
thereafter of the holders of Rights shall be to receive the Redemption Price.
The Company shall promptly give public notice of any such redemption; PROVIDED,
HOWEVER, that the failure to give, or any defect in, any such notice shall not
affect the validity of such redemption. Within 10 days after such action of the
Board of Directors ordering the redemption of the Rights pursuant to paragraph
(a), the Company shall mail a notice of redemption to all the holders of the
then outstanding Rights at their last addresses as they appear upon the registry
books of the Rights Agent or, prior to the Distribution Date, on the registry
books of the transfer agent for the Common Shares. Any notice which is mailed in
the manner herein provided shall be deemed given, whether or not the holder
receives the notice. If the payment of the Redemption Price is not included with
such notice, each such notice shall state the method by which the payment of the
Redemption Price will be made. Neither the Company nor any of its Affiliates or
Associates may redeem, acquire or purchase for value any Rights at any time in
any manner other than that specifically set forth in this Section 23 or in
Section 24 hereof, other than in connection with the purchase of Common Shares
prior to the Distribution Date.

                             Section 24. EXCHANGE.

                                       33
<PAGE>   36

                         (a) The Board of Directors of the Company may, at its
option, at any time after any Person becomes an Acquiring Person, exchange all
or part of the then outstanding and exercisable Rights (which shall not include
Rights that have become void pursuant to the provisions of Section 11(a)(ii)
hereof) for Common Shares at an exchange ratio of one Common Share per Right,
appropriately adjusted to reflect any stock split, stock dividend or similar
transaction occurring after the date hereof (such exchange ratio being
hereinafter referred to as the "EXCHANGE RATIO"). Notwithstanding the foregoing,
the Board of Directors shall not be empowered to effect such exchange at any
time after any Person (other than the Company, any Subsidiary of the Company,
any employee benefit plan of the Company or any such Subsidiary, or any entity
holding Common Shares for or pursuant to the terms of any such plan), together
with all Affiliates and Associates of such Person, becomes the Beneficial Owner
of a majority of the Common Shares then outstanding.

                         (b) Immediately upon the action of the Board of
Directors of the Company ordering the exchange of any Rights pursuant to
subsection (a) of this Section 24 and without any further action and without any
notice, the right to exercise such Rights shall terminate and the only right
thereafter of a holder of such Rights shall be to receive that number of Common
Shares equal to the number of such Rights held by such holder multiplied by the
Exchange Ratio. The Company shall promptly give public notice of any such
exchange; PROVIDED, HOWEVER, that the failure to give, or any defect in, such
notice shall not affect the validity of such exchange. The Company promptly
shall mail a notice of any such exchange to all of the holders of such Rights at
their last addresses as they appear upon the registry books of the Rights Agent.
Any notice which is mailed in the manner herein provided shall be deemed given,
whether or not the holder receives the notice. Each such notice of exchange will
state the method by which the exchange of the Common Shares for Rights will be
effected and, in the event of any partial exchange, the number of Rights which
will be exchanged. Any partial exchange shall be effected PRO RATA based on the
number of Rights (other than Rights which have become void pursuant to the
provisions of Section 11(a)(ii) hereof) held by each holder of Rights.

                                       34
<PAGE>   37

                         (c) In any exchange pursuant to this Section 24, the
Company, at its option, may substitute Preferred Shares or common stock
equivalents for Common Shares exchangeable for Rights, at the initial rate of
one one-thousandth of a Preferred Share (or an appropriate number of common
stock equivalents) for each Common Share, as appropriately adjusted to reflect
adjustments in the voting rights of the Preferred Shares pursuant to the terms
thereof, so that the fraction of a Preferred Share delivered in lieu of each
Common Share shall have the same voting rights as one Common Share.

                         (d) In the event that there shall not be sufficient
Common Shares, Preferred Shares or common stock equivalents authorized by the
Company's certificate of incorporation and not outstanding or subscribed for, or
reserved or otherwise committed for issuance for purposes other than upon
exercise of Rights, to permit any exchange of Rights as contemplated in
accordance with this Section 24, the Company shall take all such action as may
be necessary to authorize additional Common Shares, Preferred Shares or common
stock equivalents for issuance upon exchange of the Rights.

                         (e) The Company shall not be required to issue
fractions of Common Shares or to distribute certificates which evidence
fractional Common Shares. In lieu of such fractional Common Shares, the Company
shall pay to the registered holders of the Right Certificates with regard to
which such fractional Common Shares would otherwise be issuable an amount in
cash equal to the same fraction of the current per share market value of a whole
Common Share. For the purposes of this paragraph (e), the current per share
market value of a whole Common Share shall be the closing price of a Common
Share (as determined pursuant to the second sentence of Section 11(d)(i) hereof)
for the Trading Day immediately prior to the date of exchange pursuant to this
Section 24.

                     Section 25. NOTICE OF CERTAIN EVENTS.

                         (a) In case the Company shall after the Distribution
Date propose (i) to pay any dividend payable in stock of any class to the
holders of its Preferred Shares or to make any other distribution to the holders
of its Preferred Shares (other than a regular quarterly cash




                                       35
<PAGE>   38

dividend), (ii) to offer to the holders of its Preferred Shares rights or
warrants to subscribe for or to purchase any additional Preferred Shares or
shares of stock of any class or any other securities, rights or options, (iii)
to effect any reclassification of its Preferred Shares (other than a
reclassification involving only the subdivision of outstanding Preferred
Shares), (iv) to effect any consolidation or merger into or with, or to effect
any sale or other transfer (or to permit one or more of its Subsidiaries to
effect any sale or other transfer), in one or more transactions, of 50% or more
of the assets or earning power of the Company and its Subsidiaries (taken as a
whole) to, any other Person, (v) to effect the liquidation, dissolution or
winding up of the Company, or (vi) to declare or pay any dividend on the Common
Shares payable in Common Shares or to effect a subdivision, combination or
consolidation of the Common Shares (by reclassification or otherwise than by
payment of dividends in Common Shares), then, in each such case, the Company
shall give to each holder of a Right Certificate, in accordance with Section 26
hereof, a notice of such proposed action, which shall specify the record date
for the purposes of such stock dividend, or distribution of rights or warrants,
or the date on which such reclassification, consolidation, merger, sale,
transfer, liquidation, dissolution, or winding up is to take place and the date
of participation therein by the holders of the Common Shares and/or Preferred
Shares, if any such date is to be fixed, and such notice shall be so given in
the case of any action covered by clause (i) or (ii) above at least 10 days
prior to the record date for determining holders of the Preferred Shares for
purposes of such action, and in the case of any such other action, at least 10
days prior to the date of the taking of such proposed action or the date of
participation therein by the holders of the Common Shares and/or Preferred
Shares, whichever shall be the earlier.

                         (b) In case any event set forth in Section 11(a)(ii)
hereof shall occur, then the Company shall as soon as practicable thereafter
give to each holder of a Right Certificate, in accordance with Section 26
hereof, a notice of the occurrence of such event, which notice shall describe
such event and the consequences of such event to holders of Rights under Section
11(a)(ii) hereof.

                                       36


<PAGE>   39

                SECTION 26. NOTICES. Notices or demands authorized by this
Agreement to be given or made by the Rights Agent or by the holder of any Right
Certificate to or on the Company shall be sufficiently given or made if sent by
first-class mail, postage prepaid, addressed (until another address is filed in
writing with the Rights Agent) as follows:

                           Applied Science and Technology, Inc.
                           35 Cabot Road
                           Woburn, Massachusetts  01801
                           Attention:   Richard S. Post, Ph.D., President


                           Copy to:

                           Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C.
                           One Financial Center
                           Boston, MA   02111
                           Attention:  Neil H. Aronson, Esq.

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Right Certificate to or on the Rights Agent shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed (until another address
is filed in writing with the Company) as follows:

                           Continental Stock Transfer & Trust Company
                           2  Broadway
                           New York, NY   10004
                           Attention:  Compliance Department


         Notices or demands authorized by this Agreement to be given or made by
the Company or the Rights Agent to the holder of any Right Certificate shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to such holder at the address of such holder as shown on the registry
books of the Company. 

                SECTION 27. SUPPLEMENTS AND AMENDMENTS. The Company may from
time to time, and the Rights Agent shall, if the Company so directs, supplement
or amend this Agreement without the approval of any holders of Right
Certificates in order to cure any ambiguity, to correct or supplement any
provision contained herein which may be defective or inconsistent with any


                                       37


<PAGE>   40

other provisions herein, or to make any change to or delete any provision hereof
or to adopt any other provisions with respect to the Rights which the Company
may deem necessary or desirable; PROVIDED, HOWEVER, that from and after such
time as any Person becomes an Acquiring Person, this Agreement shall not be
amended or supplemented in any manner which would adversely affect the interests
of the holders of Rights (other than an Acquiring Person and its Affiliates and
Associates). Any supplement or amendment authorized by this Section 27 will be
evidenced by a writing signed by the Company and the Rights Agent.

                SECTION 28. SUCCESSORS. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Rights Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

                SECTION 29. BENEFITS OF THIS AGREEMENT. Nothing in this
Agreement shall be construed to give to any person or corporation other than the
Company, the Rights Agent and the registered holders of the Right Certificates
(and, prior to the Distribution Date, the Common Shares) any legal or equitable
right, remedy or claim under this Agreement; but this Agreement shall be for the
sole and exclusive benefit of the Company, the Rights Agent and the registered
holders of the Right Certificates (and, prior to the Distribution Date, the
Common Shares).

                SECTION 30. SEVERABILITY. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

                SECTION 31. GOVERNING LAW. This Agreement and each Right
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Delaware and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts to
be made and performed entirely within such State.

                SECTION 32. COUNTERPARTS. This Agreement may be executed in any
number of counterparts and each of such counterparts shall for all purposes be
deemed to be an original, and all such counterparts shall together constitute
but one and the same instrument.


                                       38
<PAGE>   41

                SECTION 33. DESCRIPTIVE HEADINGS. Descriptive headings of the
several Sections of this Agreement are inserted for convenience only and shall
not control or affect the meaning or construction of any of the provisions
hereof.

                SECTION 34. ADMINISTRATION. The Board of Directors of the
Company shall have the exclusive power and authority to administer and interpret
the provisions of this Agreement and to exercise all rights and powers
specifically granted to the Board of Directors or the Company or as may be
necessary or advisable in the administration of this Agreement. All such
actions, calculations, determinations and interpretations which are done or made
by the Board of Directors in good faith shall be final, conclusive and binding
on the Company, the Rights Agent, the holders of the Rights and all other
parties and shall not subject the Board of Directors to any liability to the
holders of the Rights.


                                       39
<PAGE>   42


                  IN WITNESS WHEREOF, the parties hereto have caused this Rights
Agreement to be duly executed and their respective corporate seals to be
hereunder affixed and attested, all as of the day and year first above written.


Attest:                                     APPLIED SCIENCE AND TECHNOLOGY, INC.


By:     /s/ John Tarrh                              By: /s/ Richard S. Post
        ------------------------                    ---------------------------
Name:   John M. Tarrh                       Name:   Richard S. Post, Ph.D.
Title:  Secretary                           Title:  President





Attest:                                     CONTINENTAL STOCK TRANSFER & 
                                            TRUST COMPANY


By:     /s/ Thomas Jennings                         By: /s/ William Seegraber
        ------------------------                    ---------------------------
Name:   Thomas Jennings                     Name:   William F. Seegraber
Title:  Assistant Secretary                 Title:  Vice President



                                       40
<PAGE>   43








                                                                     EXHIBIT A




                                      FORM

                                       of

                           CERTIFICATE OF DESIGNATION

                                       of

                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       of

                      APPLIED SCIENCE AND TECHNOLOGY, INC.
                 -----------------------------------------------

                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)

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



                  APPLIED SCIENCE AND TECHNOLOGY, INC., a corporation organized
and existing under the General Corporation Law of the State of Delaware
(hereinafter called the "CORPORATION"), hereby certifies that the following
resolution was adopted by the Board of Directors of the Corporation as required
by Section 151 of the General Corporation Law at a meeting duly called and held
on February 19, 1998:

                  RESOLVED, that pursuant to the authority granted to and vested
in the Board of Directors of this Corporation (hereinafter called the "BOARD OF
DIRECTORS" or the "BOARD") in accordance with the provisions of the Restated
Certificate of Incorporation of the Corporation (the "RESTATED CERTIFICATE OF
INCORPORATION"), the Board of Directors hereby creates a series of Preferred
Stock, par value $0.01 per share (the "PREFERRED Stock"), of the Corporation and
hereby states the designation and number of shares, and fixes the relative
rights, preferences, and limitations thereof as follows:

                  Section 1. DESIGNATION AND AMOUNT. The shares of this series
shall be designated as "Series A Junior Participating Preferred Stock" (the
"SERIES A PREFERRED STOCK") and the number of shares constituting the Series A
Preferred Stock shall be 100,000. Such number of shares may be increased or
decreased by resolution of the Board of Directors; PROVIDED, that no decrease
shall reduce the number of shares of Series A Preferred Stock to a number less
than the number of shares then outstanding plus the number of shares reserved
for issuance upon the exercise of outstanding options, rights or warrants or
upon the conversion of any outstanding securities issued by the Corporation
convertible into Series A Preferred Stock.


                                      A-1


<PAGE>   44

                  Section  2.  DIVIDENDS AND DISTRIBUTIONS.

                           (A) Subject to the rights of the holders of any
shares of any series of Preferred Stock (or any other stock) ranking prior and
superior to the Series A Preferred Stock with respect to dividends, the holders
of shares of Series A Preferred Stock shall be entitled to receive, when, as and
if declared by the Board of Directors out of funds legally available for the
purpose, quarterly dividends payable in cash on the last day of March, June,
September and December in each year (each such date being referred to herein as
a "QUARTERLY DIVIDEND PAYMENT DATE"), commencing on the first Quarterly Dividend
Payment Date after the first issuance of a share or fraction of a share of
Series A Preferred Stock, in an amount (if any) per share (rounded to the
nearest cent), subject to the provision for adjustment hereinafter set forth,
equal to 1000 times the aggregate per share amount of all cash dividends, and
1000 times the aggregate per share amount (payable in kind) of all non-cash
dividends or other distributions, other than a dividend payable in shares of
Common Stock, par value $0.01 per share (the "COMMON STOCK"), of the Corporation
or a subdivision of the outstanding shares of Common Stock (by reclassification
or otherwise), declared on the Common Stock since the immediately preceding
Quarterly Dividend Payment Date or, with respect to the first Quarterly Dividend
Payment Date, since the first issuance of any share or fraction of a share of
Series A Preferred Stock. In the event the Corporation shall at any time declare
or pay any dividend on the Common Stock payable in shares of Common Stock, or
effect a subdivision or combination or consolidation of the outstanding shares
of Common Stock (by reclassification or otherwise than by payment of a dividend
in shares of Common Stock) into a greater or lesser number of shares of Common
Stock, then in each such case the amount to which holders of shares of Series A
Preferred Stock were entitled immediately prior to such event under the
preceding sentence shall be adjusted by multiplying such amount by a fraction,
the numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

                           (B) The Corporation shall declare a dividend or
distribution on the Series A Preferred Stock as provided in paragraph (A) of
this Section immediately after it declares a dividend or distribution on the
Common Stock (other than a dividend payable in shares of Common Stock).

                           (C) Dividends due pursuant to paragraph (A) of this
Section shall begin to accrue and be cumulative on outstanding shares of Series
A Preferred Stock from the Quarterly Dividend Payment Date next preceding the
date of issue of such shares, unless the date of issue of such shares is prior
to the record date for the first Quarterly Dividend Payment Date, in which case
dividends on such shares shall begin to accrue from the date of issue of such
shares, or unless the date of issue is a Quarterly Dividend Payment Date or is a
date after the record date for the determination of holders of shares of Series
A Preferred Stock entitled to receive a quarterly dividend and before such
Quarterly Dividend Payment Date, in either of which events such dividends shall
begin to accrue and be cumulative from such Quarterly Dividend Payment Date.
Accrued but unpaid dividends shall not bear interest. Dividends paid on the
shares of Series A Preferred Stock in an amount less than the total amount of
such dividends at the time accrued and payable on such shares shall be allocated
pro rata on a share-by-share basis among all such shares at the time
outstanding. The Board of Directors may fix a record date for the determination
of holders of shares of Series A Preferred Stock entitled to receive payment of
a dividend or distribution declared thereon, which record date shall be not more
than 60 days prior to the date fixed for the payment thereof.

                                      A-2
<PAGE>   45

                  Section  3.  VOTING  RIGHTS.  The holders of shares of Series
A Preferred Stock shall have the following voting rights:

                           (A) Subject to the provision for adjustment
hereinafter set forth, each share of Series A Preferred Stock shall entitle the
holder thereof to 1000 votes on all matters submitted to a vote of the
stockholders of the Corporation. In the event the Corporation shall at any time
declare or pay any dividend on the Common Stock payable in shares of Common
Stock, or effect a subdivision or combination or consolidation of the
outstanding shares of Common Stock (by reclassification or otherwise than by
payment of a dividend in shares of Common Stock) into a greater or lesser number
of shares of Common Stock, then in each such case the number of votes per share
to which holders of shares of Series A Preferred Stock were entitled immediately
prior to such event shall be adjusted by multiplying such number by a fraction,
the numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

                           (B) Except as otherwise provided the Restated
Certificate of Incorporation, including any other Certificate of Designations
creating a series of Preferred Stock or any similar stock, or by law, the
holders of shares of Series A Preferred Stock and the holders of shares of
Common Stock and any other capital stock of the Corporation having general
voting rights shall vote together as one class on all matters submitted to a
vote of stockholders of the Corporation.

                           (C) Except as set forth herein, or as otherwise
required by law, holders of Series A Preferred Stock shall have no special
voting rights and their consent shall not be required (except to the extent they
are entitled to vote with holders of Common Stock as set forth herein) for
taking any corporate action.

                  Section  4.       CERTAIN RESTRICTIONS.

                           (A) Whenever quarterly dividends or other dividends
or distributions payable on the Series A Preferred Stock as provided in Section
2 are in arrears, thereafter and until all accrued and unpaid dividends and
distributions, whether or not declared, on shares of Series A Preferred Stock
outstanding shall have been paid in full, the Corporation shall not:

                                    (i) declare or pay dividends, or make any
other distributions, on any shares of stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Series A
Preferred Stock;

                                    (ii) declare or pay dividends, or make any
other distributions, on any shares of stock ranking on a parity (either as to
dividends or upon liquidation, dissolution or winding up) with the Series A
Preferred Stock, except dividends paid ratably on the Series A Preferred Stock
and all such parity stock on which dividends are payable or in arrears in
proportion to the total amounts to which the holders of all such shares are then
entitled; or

                                    (iii) redeem or purchase or otherwise
acquire for consideration shares of any stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Series A
Preferred Stock, provided that the Corporation may at any time redeem, purchase
or otherwise acquire shares of any such junior stock in exchange for shares of
any stock of the Corporation ranking junior (as to dividends and upon
dissolution, liquidation or winding up) to the Series A Preferred Stock.


                                      A-3
<PAGE>   46

                           (B) The Corporation shall not permit any subsidiary
of the Corporation to purchase or otherwise acquire for consideration any shares
of stock of the Corporation unless the Corporation could, under paragraph (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

                  Section 5. REACQUIRED SHARES. Any shares of Series A Preferred
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and canceled promptly after the acquisition thereof.
All such shares shall upon their cancellation become authorized but unissued
shares of Preferred Stock and may be reissued as part of a new series of
Preferred Stock subject to the conditions and restrictions on issuance set forth
herein or in the Restated Certificate of Incorporation, including any
Certificate of Designations creating a series of Preferred Stock or any similar
stock, or as otherwise required by law.

                  Section 6. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any
liquidation, dissolution or winding up of the Corporation the holders of shares
of Series A Preferred Stock shall be entitled to receive an aggregate amount per
share, subject to the provision for adjustment hereinafter set forth, equal to
1000 times the aggregate amount to be distributed per share to holders of shares
of Common Stock plus an amount equal to any accrued and unpaid dividends. In the
event the Corporation shall at any time declare or pay any dividend on the
Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the aggregate amount to which holders of shares of Series A Preferred
Stock were entitled immediately prior to such event under the preceding sentence
shall be adjusted by multiplying such amount by a fraction the numerator of
which is the number of shares of Common Stock outstanding immediately after such
event and the denominator of which is the number of shares of Common Stock that
were outstanding immediately prior to such event.

                  Section 7. CONSOLIDATION, MERGER, ETC. In case the Corporation
shall enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case each share
of Series A Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment
hereinafter set forth, equal to 1000 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Stock is changed or exchanged.
In the event the Corporation shall at any time declare or pay any dividend on
the Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the amount set forth in the preceding sentence with respect to the
exchange or change of shares of Series A Preferred Stock shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                  Section 8. AMENDMENT. The Restated Certificate of
Incorporation shall not be amended in any manner, including in a merger or
consolidation, which would alter, change, or repeal the powers, preferences or
special rights of the Series A Preferred Stock so as to affect them adversely
without the affirmative vote of the holders of at least two-thirds of the
outstanding shares of Series A Preferred Stock, voting together as a single
class.


                                      A-4

<PAGE>   47

                  Section 9. RANK. The Series A Preferred Stock shall rank, with
respect to the payment of dividends and upon liquidation, dissolution and
winding up, junior to all series of Preferred Stock.

                  IN WITNESS WHEREOF, this Certificate of Designation is
executed on behalf of the Corporation by its President this day of February,
1998.






                                               By:  
                                                   ----------------------------
                                                   Richard S. Post, Ph.D.,
                                                   President


                                      A-5
<PAGE>   48

                                                                       EXHIBIT B



                            Form of Right Certificate

Certificate No. R-                                                _______ Rights


         NOT EXERCISABLE AFTER DECEMBER 31, 2007 OR EARLIER IF REDEMPTION OR
         EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $0.01 PER
         RIGHT AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.
         UNDER CERTAIN CIRCUMSTANCES, RIGHTS THAT ARE OR WERE ACQUIRED OR
         BENEFICIALLY OWNED BY AN ACQUIRING PERSON OR ANY ASSOCIATES OR
         AFFILIATES THEREOF (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT)
         OR ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID.


                                Right Certificate
                           ---------------------------

This certifies that _______________________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of March 4, 1998 (the "RIGHTS AGREEMENT"), between Applied
Science and Technology, Inc., a Delaware corporation (the "COMPANY"), and
Continental Stock Transfer & Trust Company (the "RIGHTS AGENT"), to purchase
from the Company at any time after the Distribution Date (as such term is
defined in the Rights Agreement) and prior to 5:00 P.M., Boston, Massachusetts
time, on December 31, 2007, at the principal office of the Rights Agent, or at
the office of its successor as Rights Agent, one one-thousandth of a fully paid
non-assessable share of Series A Junior Participating Preferred Stock, par value
$0.01 per share (the "PREFERRED SHARES"), of the Company, at a purchase price of
$70.00 per one one-thousandth of a Preferred Share (the "PURCHASE PRICE"), upon
presentation and surrender of this Right Certificate with the certification and
the Form of Election to Purchase duly executed. The number of Rights evidenced
by this Right Certificate (and the number of one one-thousandths of a Preferred
Share which may be purchased upon exercise hereof) set forth above, and the
Purchase Price set forth above, are the number and Purchase Price as of March 4,
1998, based on the Preferred Shares as constituted at such date. As provided in
the Rights Agreement, the Purchase Price and the number of one one-thousandths
of a Preferred Share which may be purchased upon the exercise of the Rights
evidenced by this Right Certificate are subject to modification and adjustment
upon the happening of certain events.

                  From and after the occurrence of an event described in Section
11(a)(ii) of the Rights Agreement, if the Rights are or were at any time on or
after the earlier of (x) the date of such event and (y) the Distribution Date
(as such term is defined in the Rights Agreement) acquired or beneficially owned
by an Acquiring Person or an Associate or Affiliate of an Acquiring Person (as


                                      B-1
<PAGE>   49

such terms are defined in the Rights Agreement), such Rights shall become void,
and any holder of such Rights shall thereafter have no right to exercise such
Rights.

                  This Right Certificate is subject to all of the terms,
provisions and conditions of the Rights Agreement, which terms, provisions and
conditions are hereby incorporated herein by reference and made a part hereof
and to which Rights Agreement reference is hereby made for a full description of
the rights, limitations of rights, obligations, duties and immunities hereunder
of the Rights Agent, the Company and the holders of the Right Certificates.
Copies of the Rights Agreement are on file at the principal executive offices of
the Company and the offices of the Rights Agent.

                  This Right Certificate, with or without other Right
Certificates, upon surrender at the principal office of the Rights Agent, may be
exchanged for another Right Certificate or Right Certificates of like tenor and
date evidencing Rights entitling the holder to purchase a like aggregate number
of Preferred Shares as the Rights evidenced by the Right Certificate or Right
Certificates surrendered shall have entitled such holder to purchase. If this
Right Certificate shall be exercised in part, the holder shall be entitled to
receive upon surrender hereof another Right Certificate or Right Certificates
for the number of whole Rights not exercised.

                  Subject to the provisions of the Rights Agreement, at the
Company's option, the Rights evidenced by this Certificate (i) may be redeemed
by the Company at a redemption price of $0.01 per Right or (ii) may be exchanged
in whole or in part for shares of the Company's Common Stock, par value $0.01
per share, or Preferred Shares.

                  No fractional Preferred Shares will be issued upon the
exercise of any Right or Rights evidenced hereby (other than fractions which are
integral multiples of one one-thousandth of a Preferred Share, which may, at the
election of the Company, be evidenced by depository receipts), but in lieu
thereof a cash payment will be made, as provided in the Rights Agreement.

                  No holder of this Right Certificate shall be entitled to vote
or receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Company which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Right or Rights evidenced by this Right
Certificate shall have been exercised as provided in the Rights Agreement.

                  This Right Certificate shall not be valid or obligatory for
any purpose until it shall have been countersigned by the Rights Agent.

                                      B-2
<PAGE>   50




                  WITNESS the facsimile signature of the proper officers of the
Company and its corporate seal.

Dated:  March 4, 1998.


Attest:                                    APPLIED SCIENCE AND TECHNOLOGY, INC.


By:_____________________________           By:_____________________________
   John M. Tarrh, Secretary                   Richard S. Post, Ph.D., President


Countersigned:

Continental Stock Transfer & Trust Company
                  Rights Agent

By:      ___________________________________





                                      B-3
<PAGE>   51


                    Form of Reverse Side of Right Certificate

                               FORM OF ASSIGNMENT

                (To be executed by the registered holder if such
               holder desires to transfer the Right Certificate.)

                  FOR VALUE RECEIVED _________________________________ hereby
sells, assigns and transfers unto

- --------------------------------------------------------------------------------
                  (Please print name and address of transferee)

this Right Certificate, together with all right, title and interest therein, and
does hereby irrevocably constitute and appoint ____________________________,
Attorney, to transfer the within Right Certificate on the books of the
within-named Company, with full power of substitution.


Dated: _____________ ___, _____



                                    ---------------------------------
                                    Signature


Signature Guaranteed:



                  The undersigned hereby certifies that the Rights evidenced by
this Right Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).



                                    ---------------------------------
                                    Signature


                                      B-4

<PAGE>   52


              Form of Reverse Side of Right Certificate - continued

                          FORM OF ELECTION TO PURCHASE

                      (To be executed if holder desires to
                        exercise the Right Certificate.)

To _______________________:

                  The undersigned hereby irrevocably elects to exercise
________________ Rights represented by this Right Certificate to purchase the
Preferred Shares issuable upon the exercise of such Rights and requests that
certificates for such Preferred Shares be issued in the name of:

Please insert social security
or other identifying number

- -----------------------------------------------------------------
                  (Please print name and address)

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

If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number

- -----------------------------------------------------------------
                  (Please print name and address)

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


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


Dated: _____________ ___, _____



                                    ---------------------------------
                                    Signature



Signature Guaranteed:



                                      B-5
<PAGE>   53



              Form of Reverse Side of Right Certificate - continued



                  The undersigned hereby certifies that the Rights evidenced by
this Right Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).



                                     ---------------------------------
                                    Signature


                                     NOTICE

                  The signature in the foregoing Forms of Assignment and
Election must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

                  In the event the certification set forth above in the Form of
Assignment or the Form of Election to Purchase, as the case may be, is not
completed, the Company and the Rights Agent will deem the beneficial owner of
the Rights evidenced by this Right Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and such
Assignment or Election to Purchase will not be honored.


                                      B-6
<PAGE>   54





                                                                       EXHIBIT C

                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES



                  On February 19, 1998, the Board of Directors of Applied
Science and Technology, Inc. (the "COMPANY") declared a dividend of one
preferred share purchase right (a "RIGHT") for each outstanding share of common
stock, par value $0.01 per share (the "COMMON SHARES") outstanding on March 4,
1998 (the "RECORD DATE") to the stockholders of record on that date. Each Right
entitles the registered holder to purchase from the Company one one-thousandth
of a share of Series A Junior Participating Preferred Stock, par value $0.01 per
share (the "PREFERRED SHARES"), of the Company, at a price of $70.00 per one
one-thousandth of a Preferred Share (the "PURCHASE PRICE"), subject to
adjustment. The description and terms of the Rights are set forth in a Rights
Agreement (the "RIGHTS AGREEMENT") between the Company and Continental Stock
Transfer & Trust Company, as Rights Agent (the "RIGHTS AGENT").

                  Until the earlier to occur of (i) 10 days following a public
announcement that a person or group of affiliated or associated persons (an
"ACQUIRING PERSON") has acquired beneficial ownership of 15% or more of the
outstanding Common Shares or (ii) 10 business days (or such later date as may be
determined by action of the Board of Directors prior to such time as any Person
becomes an Acquiring Person) following the commencement of, or announcement of
an intention to make, a tender offer or exchange offer the consummation of which
would result in the beneficial ownership by a person or group of 15% or more of
such outstanding Common Shares (the earlier of such dates being called the
"DISTRIBUTION DATE"), the Rights will be evidenced, with respect to any of the
Common Share certificates outstanding as of the Record Date, by such Common
Share certificate with a copy of this Summary of Rights attached thereto.

                  The Agreement provides that, until the Distribution Date, the
Rights will be transferred with and only with the Common Shares. Until the
Distribution Date (or earlier redemption or expiration of the Rights), new
Common Share certificates issued after the Record Date or upon transfer or new
issuance of Common Shares will contain a notation incorporating the Agreement by
reference. Until the Distribution Date (or earlier redemption or expiration of
the Rights), the surrender for transfer of any certificates for Common Shares
outstanding as of the Record Date, even without such notation or a copy of this
Summary of Rights being attached thereto, will also constitute the transfer of
the Rights associated with the Common Shares represented by such certificate. As
soon as practicable following the Distribution Date, separate certificates
evidencing the Rights ("RIGHT CERTIFICATES") will be mailed to holders of record
of the Common Shares as of the Close of Business on the Distribution Date and
such separate Right Certificates alone will evidence the Rights.

                  The Rights are not exercisable until the Distribution Date.
The Rights will expire on December 31, 2007 (the "FINAL EXPIRATION DATE"),
unless the Final Expiration Date is extended or unless the Rights are earlier
redeemed by the Company, in each case, as described below.

                  The Purchase Price payable, and the number of Preferred Shares
or other securities or property issuable, upon exercise of the Rights are
subject to adjustment from time to time to prevent dilution (i) in the event of
a stock dividend on, or a subdivision, combination or reclassification of, the
Preferred Shares, (ii) upon the grant to holders of the Preferred Shares of
certain rights or warrants to subscribe for or purchase Preferred Shares at a
price, or securities convertible into Preferred Shares with a conversion price,
less than the then current market price of




                                      C-1
<PAGE>   55

the Preferred Shares or (iii) upon the distribution to holders of the Preferred
Shares of evidences of indebtedness or assets (excluding regular periodic cash
dividends paid out of earnings or retained earnings or dividends payable in
Preferred Shares) or of subscription rights or warrants (other than those
referred to above).

                  The number of outstanding Rights and the number of one
one-thousandths of a Preferred Share issuable upon exercise of each Right are
also subject to adjustment in the event of a stock split of the Common Shares or
a stock dividend on the Common Shares payable in Common Shares or subdivisions,
consolidations or combinations of the Common Shares occurring, in any such case,
prior to the Distribution Date.

                  Preferred Shares purchasable upon exercise of the Rights will
not be redeemable. Each Preferred Share will be entitled to a quarterly dividend
payment of 1000 times the dividend declared per Common Share. In the event of
liquidation, the holders of the Preferred Shares will be entitled to an
aggregate payment of 1000 times the aggregate payment made per Common Share.
Each Preferred Share will have 1000 votes, voting together with the Common
Shares. In the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
1000 times the amount received per Common Share. These rights are protected by
customary antidilution provisions.

                  Because of the nature of the Preferred Shares' dividend,
liquidation and voting rights, the value of the one one-thousandth interest in a
Preferred Share purchasable upon exercise of each Right should approximate the
value of one Common Share.

                  From and after the occurrence of an event described in Section
11(a)(ii) of the Rights Agreement, if the Rights evidenced by this Right
Certificate are or were at any time on or after the earlier of (x) the date of
such event and (y) the Distribution Date (as such term is defined in the Rights
Agreement) acquired or beneficially owned by an Acquiring Person or an Associate
or Affiliate of an Acquiring Person (as such terms are defined in the Rights
Agreement), such Rights shall become void, and any holder of such Rights shall
thereafter have no right to exercise such Rights.

                  In the event that, at any time after a Person becomes an
Acquiring Person, the Company is acquired in a merger or other business
combination transaction or 50% or more of its consolidated assets or earning
power are sold, proper provision will be made so that each holder of a Right
will thereafter have the right to receive, upon the exercise thereof at the then
current exercise price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction will have a market
value of two times the exercise price of the Right. In the event that any person
becomes an Acquiring Person, proper provision shall be made so that each holder
of a Right, other than Rights beneficially owned by the Acquiring Person and its
Affiliates and Associates (which will thereafter be void), will thereafter have
the right to receive upon exercise that number of Common Shares having a market
value of two times the exercise price of the Right. If the Company does not have
sufficient Common Shares to satisfy such obligation to issue Common Shares, or
if the Board of Directors so elects, the Company shall deliver upon payment of
the exercise price of a Right an amount of cash or securities equivalent in
value to the Common Shares issuable upon exercise of a Right; provided that, if
the Company fails to meet such obligation within 30 days following the later of
(x) the first occurrence of an event triggering the right to purchase Common
Shares and (y) the date on which the Company's right to redeem the Rights
expires, the Company must deliver, upon exercise of a Right but without
requiring payment of the exercise price then in effect, Common Shares (to the
extent available) and cash equal in value to the difference between the value of
the Common Shares otherwise issuable



                                      C-2



<PAGE>   56

upon the exercise of a Right and the exercise price then in effect. The Board of
Directors may extend the 30-day period described above for up to an additional
60 days to permit the taking of action that may be necessary to authorize
sufficient additional Common Shares to permit the issuance of Common Shares upon
the exercise in full of the Rights.

                  At any time after any Person becomes an Acquiring Person and
prior to the acquisition by any person or group of a majority of the outstanding
Common Shares, the Board of Directors of the Company may exchange the Rights
(other than Rights owned by such person or group which have become void), in
whole or in part, at an exchange ratio of one Common Share per Right (subject to
adjustment).

                  With certain exceptions, no adjustment in the Purchase Price
will be required until cumulative adjustments require an adjustment of at least
1% in such Purchase Price. No fractional Preferred Shares will be issued (other
than fractions which are integral multiples of one one-thousandth of a Preferred
Share, which may, at the election of the Company, be evidenced by depository
receipts) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day prior to the date
of exercise.

                  At any time prior to the time any Person becomes an Acquiring
Person, the Board of Directors of the Company may redeem the Rights in whole,
but not in part, at a price of $0.01 per Right (the "REDEMPTION Price"). The
redemption of the Rights may be made effective at such time, on such basis and
with such conditions as the Board of Directors in its sole discretion may
establish. Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

                  The terms of the Rights may be amended by the Board of
Directors of the Company without the consent of the holders of the Rights,
except that from and after such time as any person becomes an Acquiring Person
no such amendment may adversely affect the interests of the holders of the
Rights (other than the Acquiring Person and its Affiliates and Associates).

                  Until a Right is exercised, the holder thereof, as such, will
have no rights as a stockholder of the Company, including, without limitation,
the right to vote or to receive dividends.

                  A copy of the Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
[March , 1998]. A copy of the Agreement is available free of charge from the
Company. This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Agreement, which is hereby
incorporated herein by reference.




                                      C-3


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