HUMAN GENOME SCIENCES INC
S-3, EX-1.1, 2000-09-06
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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                                                                     EXHIBIT 1.1

                           HUMAN GENOME SCIENCES, INC.

                       UNDERWRITING AGREEMENT BASIC TERMS

        1. Introductory. Human Genome Sciences, Inc., a Delaware corporation
("COMPANY"), proposes to issue and sell from time to certain of its unsecured
debt securities, preferred stock and common stock ("COMMON STOCK") registered
under the registration statement referred to in Section 2(a) ("REGISTERED
SECURITIES"). The Registered Securities constituting debt securities will be
issued under an indenture ("INDENTURE") between the Company and one or more
trustees, in one or more series, which series may vary as to interest rates,
maturities, redemption provisions, selling prices and other terms. The
Registered Securities constituting preferred stock may be issued in one or more
series, which series may vary as to dividend rates, redemption provisions,
selling prices and other terms. Particular series or offerings of Registered
Securities will be sold pursuant to a Terms Agreement referred to in Section 3,
for resale in accordance with terms of offering determined at the time of sale.

        The Registered Securities involved in any such offering are hereinafter
referred to as the "OFFERED SECURITIES". The firm or firms which agree to
purchase the Offered Securities are hereinafter referred to as the
"UNDERWRITERS" of such securities, and the representative or representatives of
the Underwriters, if any, specified in a Terms Agreement referred to in Section
3 are hereinafter referred to as the "REPRESENTATIVES"; provided, however, that
if the Terms Agreement does not specify any representative of the Underwriters,
the term "Representatives", as used in this Agreement (other than in Sections
2(b), 5(c) and 6 and the second sentence of Section 3), shall mean the
Underwriters.

        2. Representations and Warranties of the Company. The Company, as of the
date of each Terms Agreement referred to in Section 3, represents and warrants
to, and agrees with, each Underwriter that:

                 (a) A registration statement (No. 333- ), including a
          prospectus, relating to the Registered Securities has been filed with
          the Securities and Exchange Commission ("COMMISSION") and has become
          effective. Such registration statement, as amended at the time of any
          Terms Agreement referred to in Section 3, is hereinafter referred to
          as the "REGISTRATION STATEMENT", and the prospectus included in such
          Registration Statement, as supplemented as contemplated by Section 3
          to reflect the terms of the Offered Securities (if they are debt
          securities or preferred stock) and the terms of the offering of the
          Offered Securities, as first filed with the Commission pursuant to and
          in accordance with Rule 424(b) ("RULE 424(b)") under the Securities
          Act of 1933 ("ACT"), including all material incorporated by reference
          therein, is hereinafter referred to as the "PROSPECTUS". No document
          has been or will be prepared or distributed in reliance on Rule 434
          under the Act.

                 (b) On the effective date of the registration statement
          relating to the Registered Securities, such registration statement
          conformed in all respects to the requirements of the Act, the Trust
          Indenture Act of 1939 ("TRUST INDENTURE ACT") and the rules and
          regulations of the Commission ("RULES AND REGULATIONS") and did not
          include any untrue statement of a material fact or omit to state any
          material fact required to be stated therein or necessary to make the
          statements therein not misleading, and on the date of each Terms
          Agreement referred to in Section 3, the Registration Statement and the
          Prospectus will conform in all respects to the requirements of the
          Act, the Trust Indenture Act and the Rules and Regulations, and
          neither of such documents will include any untrue statement of a
          material fact or omit to state any material fact required to be stated
          therein or necessary to make the statements therein not misleading,
          except that the foregoing does not apply to statements in or omissions
          from any of such


<PAGE>   2

          documents based upon written information furnished to the Company by
          any Underwriter through the Representatives, if any, specifically for
          use therein.

                 (c) The Company has been duly incorporated and is an existing
          corporation in good standing under the laws of the State of Delaware,
          with power and authority (corporate and other) to own its properties
          and conduct its business as described in the Prospectus; and the
          Company is duly qualified to do business as a foreign corporation in
          good standing in all other jurisdictions in which its ownership or
          lease of property or the conduct of its business requires such
          qualification.

                 (d) Each subsidiary of the Company has been duly incorporated
          and is an existing corporation in good standing under the laws of the
          jurisdiction of its incorporation, with power and authority (corporate
          and other) to own its properties and conduct its business as described
          in the Prospectus; and each subsidiary of the Company is duly
          qualified to do business as a foreign corporation in good standing in
          all other jurisdictions in which its ownership or lease of property or
          the conduct of its business requires such qualification; all of the
          issued and outstanding capital stock of each subsidiary of the Company
          has been duly authorized and validly issued and is fully paid and
          nonassessable; and the capital stock of each subsidiary owned by the
          Company, directly or through subsidiaries, is owned free from liens,
          encumbrances and defects.

                 (e) If the Offered Securities are debt securities: The
          Indenture has been duly authorized and has been duly qualified under
          the Trust Indenture Act; the Offered Securities have been duly
          authorized; and when the Offered Securities are delivered and paid for
          pursuant to the Terms Agreement on the Closing Date (as defined below)
          or pursuant to Delayed Delivery Contracts (as hereinafter defined),
          the Indenture will have been duly executed and delivered, such Offered
          Securities will have been duly executed, authenticated, issued and
          delivered and will conform to the description thereof contained in the
          Prospectus and the Indenture and such Offered Securities will
          constitute valid and legally binding obligations of the Company,
          enforceable in accordance with their terms, subject to bankruptcy,
          insolvency, fraudulent transfer, reorganization, moratorium and
          similar laws of general applicability relating to or affecting
          creditors' rights and to general equity principles.

                 (f) If the Offered Securities are preferred stock: The Offered
          Securities have been duly authorized and, when the Offered Securities
          have been delivered and paid for in accordance with the Terms
          Agreement on the Closing Date, such Offered Securities will have been
          validly issued, fully paid and nonassessable and will conform to the
          description thereof contained in the Prospectus; and the stockholders
          of the Company have no preemptive rights with respect to the Offered
          Securities that have not been waived.

                 (g) If the Offered Securities are Common Stock: The Offered
          Securities and all other outstanding shares of capital stock of the
          Company have been duly authorized; all outstanding shares of capital
          stock of the Company are, and, when the Offered Securities have been
          delivered and paid for in accordance with the Terms Agreement on the
          Closing Date, such Offered Securities will have been, validly issued,
          fully paid and nonassessable and will conform to the description
          thereof contained in the Prospectus; and the stockholders of the
          Company have no preemptive rights with respect to the Offered
          Securities that have not been waived.

                 (h) If the Offered Securities are convertible: when the Offered
          Securities are delivered and paid for pursuant to the Terms Agreement
          on the Closing Date, such Offered Securities will be convertible into
          Common Stock of the Company in accordance with their terms (if the
          Offered Securities are preferred stock) or the Indenture (if the
          Offered Securities are debt securities); the shares of Common Stock
          initially

                                      -2-

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          issuable upon conversion of such Offered Securities have been duly
          authorized and reserved for issuance upon such conversion and, when
          issued upon such conversion, will be validly issued, fully paid and
          nonassessable; the outstanding shares of Common Stock have been duly
          authorized and validly issued, are fully paid and nonassessable and
          conform to the description thereof contained in the Prospectus; and
          the stockholders of the Company have no preemptive rights with respect
          to the Common Stock that have not been waived.

                 (i) If the Offered Securities are Common Stock or are
          convertible into Common Stock: Except as disclosed in the Prospectus,
          there are no contracts, agreements or understandings between the
          Company and any person that would give rise to a valid claim against
          the Company or any Underwriter for a brokerage commission, finder's
          fee or other like payment.

                 (j) If the Offered Securities constitute Common Stock or are
          convertible into Common Stock, the outstanding shares of Common Stock
          are listed on The Nasdaq Stock Market ("NASDAQ") and the Offered
          Securities (if they are Common Stock) or the Common Stock into which
          the Offered Securities are convertible (if they are convertible) have
          been approved for listing on Nasdaq, subject to notice of issuance. If
          the Offered Securities are debt securities or preferred stock, they
          have been approved for listing on the stock exchange, if any,
          indicated in the Terms Agreement, subject to notice of issuance.

                 (k) No consent, approval, authorization, or order of, or filing
          with, any governmental agency or body or any court is required for the
          consummation of the transactions contemplated by the Terms Agreement
          (including the provisions of this Agreement) in connection with the
          issuance and sale of the Offered Securities by the Company, except
          such as have been obtained and made under the Act and, if the Offered
          Securities are debt securities, the Trust Indenture Act and such as
          may be required under state securities laws.

                 (l) The execution, delivery and performance of the Indenture
          (if the Offered Securities are debt securities), the Terms Agreement
          (including the provisions of this Agreement) and any Delayed Delivery
          Contracts and the issuance and sale of the Offered Securities and, if
          the Offered Securities are debt securities or preferred stock,
          compliance with the terms and provisions thereof will not result in a
          breach or violation of any of the terms and provisions of, or
          constitute a default under, any statute, any rule, regulation or order
          of any governmental agency or body or any court, domestic or foreign,
          having jurisdiction over the Company or any subsidiary of the Company
          or any of their properties, or any agreement or instrument to which
          the Company or any such subsidiary is a party or by which the Company
          or any such subsidiary is bound or to which any of the properties of
          the Company or any such subsidiary is subject, or the charter or
          by-laws of the Company or any such subsidiary, and the Company has
          full power and authority to authorize, issue and sell the Offered
          Securities as contemplated by the Terms Agreement (including the
          provisions of this Agreement).

                 (m) The Terms Agreement (including the provisions of this
          Agreement) and, if the Offered Securities are debt securities or
          preferred stock, any Delayed Delivery Contracts have been duly
          authorized, executed and delivered by the Company.

                 (n) Except as disclosed in the Prospectus, the Company and its
          subsidiaries have good and marketable title to all real properties and
          all other properties and assets owned by them, in each case free from
          liens, encumbrances and defects that would materially affect the value
          thereof or materially interfere with the use made or to be made
          thereof by them; and except as disclosed in the Prospectus, the
          Company and its subsidiaries hold any leased real or personal property
          under valid and enforceable leases with no exceptions that would
          materially interfere with the use made or to be made thereof by them.


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<PAGE>   4

                 (o) The Company and its subsidiaries possess adequate
          certificates, authorities or permits issued by appropriate
          governmental agencies or bodies necessary to conduct the business now
          operated by them and have not received any notice of proceedings
          relating to the revocation or modification of any such certificate,
          authority or permit that, if determined adversely to the Company or
          any of its subsidiaries, would individually or in the aggregate have a
          material adverse effect on the condition (financial or other),
          business, properties or results of operations of the Company and its
          subsidiaries taken as a whole ("MATERIAL ADVERSE EFFECT").

                 (p) No labor dispute with the employees of the Company or any
          subsidiary exists or, to the knowledge of the Company, is imminent
          that might have a Material Adverse Effect.

                 (q) Except as disclosed in the Prospectus, the Company and its
          subsidiaries own, possess or can acquire on reasonable terms, adequate
          trademarks, trade names and other rights to inventions, know-how,
          patents, copyrights, confidential information and other intellectual
          property (collectively, "INTELLECTUAL PROPERTY RIGHTS") necessary to
          conduct the business now operated by them, or presently employed by
          them, and have not received any notice of infringement of or conflict
          with asserted rights of others with respect to any intellectual
          property rights that, if determined adversely to the Company or any of
          its subsidiaries, would individually or in the aggregate have a
          Material Adverse Effect.

                 (r) Except as disclosed in the Prospectus, neither the Company
          nor any of its subsidiaries is in violation of any statute, any rule,
          regulation, decision or order of any governmental agency or body or
          any court, domestic or foreign, relating to the use, disposal or
          release of hazardous or toxic substances or relating to the protection
          or restoration of the environment or human exposure to hazardous or
          toxic substances (collectively, "ENVIRONMENTAL LAWS"), owns or
          operates any real property contaminated with any substance that is
          subject to any environmental laws at levels or in quantities that
          could reasonably be expected to require remediation, is liable for any
          off-site disposal or contamination pursuant to any environmental
          laws, or is subject to any claim relating to any environmental laws,
          which violation, contamination, liability or claim would individually
          or in the aggregate have a Material Adverse Effect; and the Company
          is not aware of any pending investigation which might lead to such a
          claim.

                 (s) Except as disclosed in the Prospectus, there are no pending
          actions, suits or proceedings against or affecting the Company, any of
          its subsidiaries or any of their respective properties that, if
          determined adversely to the Company or any of its subsidiaries, would
          individually or in the aggregate have a Material Adverse Effect, or
          would materially and adversely affect the ability of the Company to
          perform its obligations under the Indenture (if the Offered Securities
          are debt securities), the Terms Agreement (including the provisions of
          this Agreement) or any Delayed Delivery Contracts, or which are
          otherwise material in the context of the sale of the Offered
          Securities; and no such actions, suits or proceedings are threatened
          or, to the Company's knowledge, contemplated.

                 (t) The financial statements included in the Registration
          Statement and Prospectus present fairly the financial position of the
          Company and its consolidated subsidiaries as of the dates shown and
          their results of operations and cash flows for the periods shown, and,
          except as otherwise disclosed in the Prospectus, such financial
          statements have been prepared in conformity with the generally
          accepted accounting principles in the United States applied on a
          consistent basis; any schedules included in the Registration Statement
          present fairly the information required to be stated therein; and if
          pro forma financial statements are included in the Registration
          Statement and Prospectus, the assumptions used in preparing the pro
          forma financial statements included in the Registration Statement and
          the Prospectus provide a reasonable basis for presenting the
          significant effects directly attributable to the transactions or
          events described therein, the related pro forma adjustments give
          appropriate effect to those assumptions,


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<PAGE>   5

          and the pro forma columns therein reflect the proper application of
          those adjustments to the corresponding historical financial statement
          amounts.

                 (u) Except as disclosed in the Prospectus, since the date of
          the latest audited financial statements included in the Prospectus
          there has been no material adverse change, nor any development or
          event involving a prospective material adverse change, in the
          condition (financial or other), business, properties or results of
          operations of the Company and its subsidiaries taken as a whole, and,
          except as disclosed in or contemplated by the Prospectus, there has
          been no dividend or distribution of any kind declared, paid or made by
          the Company on any class of its capital stock.

                 (v) The Company is not and, after giving effect to the offering
          and sale of the Offered Securities and the application of the proceeds
          thereof as described in the Prospectus, will not be an "investment
          company" as defined in the Investment Company Act of 1940.

        3. Purchase and Offering of Offered Securities. The obligation of the
Underwriters to purchase the Offered Securities will be evidenced by an
agreement or exchange of other written communications ("TERMS AGREEMENT") at the
time the Company determines to sell the Offered Securities. The Terms Agreement
will incorporate by reference the provisions of this Agreement, except as
otherwise provided therein, and will specify the firm or firms which will be
Underwriters, the names of any Representatives, the principal amount or number
of shares to be purchased by each Underwriter, including, but not limited to,
the purchase price to be paid by the Underwriters and (if the Offered Securities
are debt securities or preferred stock) the terms of the Offered Securities not
already specified (in the Indenture, in the case of Offered Securities that are
debt securities), including, but not limited to, interest rate (if debt
securities), dividend rate (if preferred stock), maturity (if debt securities),
any redemption provisions and any sinking fund requirements and whether any of
the Offered Securities may be sold to institutional investors pursuant to
Delayed Delivery Contracts (as defined below). The Terms Agreement will also
specify the time and date of delivery and payment (such time and date, or such
other time not later than seven full business days thereafter as the Underwriter
first named in the Terms Agreement (the "LEAD UNDERWRITER") and the Company
agree as the time for payment and delivery, being herein and in the Terms
Agreement referred to as the "CLOSING DATE"), the place of delivery and payment
and any details of the terms of offering that should be reflected in the
prospectus supplement relating to the offering of the Offered Securities. For
purposes of Rule 15c6-1 under the Securities Exchange Act of 1934, the Closing
Date (if later than the otherwise applicable settlement date) shall be the date
for payment of funds and delivery of securities for all the Offered Securities
sold pursuant to the offering other than Contract Securities for which payment
of funds and delivery of securities shall be as hereinafter provided. The
obligations of the Underwriters to purchase the Offered Securities will be
several and not joint. It is understood that the Underwriters propose to offer
the Offered Securities for sale as set forth in the Prospectus.

        If the Terms Agreement provides for sales of Offered Securities pursuant
to delayed delivery contracts, the Company authorizes the Underwriters to
solicit offers to purchase Offered Securities pursuant to delayed delivery
contracts substantially in the form of Annex I attached hereto ("DELAYED
DELIVERY CONTRACTS") with such changes therein as the Company may authorize or
approve. Delayed Delivery Contracts are to be with institutional investors,
including commercial and savings banks, insurance companies, pension funds,
investment companies and educational and charitable institutions. On the Closing
Date the Company will pay, as compensation, to the Representatives for the
accounts of the Underwriters, the fee set forth in such Terms Agreement in
respect of the principal amount or number of shares of Offered Securities to be
sold pursuant to Delayed Delivery Contracts ("CONTRACT SECURITIES"). The
Underwriters will not have any responsibility in respect of the validity or the
performance of Delayed Delivery Contracts. If the Company executes and delivers
Delayed Delivery Contracts, the Contract Securities will be deducted from the
Offered Securities to be purchased by the several Underwriters and the aggregate
principal amount or number of shares of Offered Securities to be purchased by
each Underwriter will be reduced pro rata in proportion to the principal amount
or number of shares of Offered Securities set forth opposite each Underwriter's
name in such Terms

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<PAGE>   6

Agreement, except to the extent that the Lead Underwriter determines that such
reduction shall be otherwise than pro rata and so advise the Company. The
Company will advise the Lead Underwriter not later than the business day prior
to the Closing Date of the principal amount or number of shares of Contract
Securities.

        If the Offered Securities are debt securities and the Terms Agreement
specifies "Book-Entry Only" settlement or otherwise states that the provisions
of this paragraph shall apply, the Company will deliver against payment of the
purchase price the Offered Securities in the form of one or more permanent
global securities in definitive form (the "GLOBAL SECURITIES") deposited with
the Trustee as custodian for The Depository Trust Company ("DTC") and registered
in the name of Cede & Co., as nominee for DTC. Interests in any permanent global
securities will be held only in book-entry form through DTC, except in the
limited circumstances described in the Prospectus. Payment for the Offered
Securities shall be made by the Underwriters in Federal (same day) funds by
official check or checks or wire transfer to an account previously designated by
the Company at a bank acceptable to the Lead Underwriter, in each case drawn to
the order of the Company at the place of payment specified in the Terms
Agreement on the Closing Date, against delivery to the Trustee as custodian for
DTC of the Global Securities representing all of the Offered Securities.

        4. Certain Agreements of the Company. The Company agrees with the
several Underwriters that it will furnish to counsel for the Underwriters, one
signed copy of the registration statement relating to the Registered Securities,
including all exhibits, in the form it became effective and of all amendments
thereto and that, in connection with each offering of Offered Securities:

                 (a) The Company will file the Prospectus with the Commission
          pursuant to and in accordance with Rule 424(b)(2) (or, if applicable
          and if consented to by the Lead Underwriter, subparagraph (5)) not
          later than the second business day following the execution and
          delivery of the Terms Agreement.

                 (b) The Company will advise the Lead Underwriter promptly of
          any proposal to amend or supplement the Registration Statement or the
          Prospectus and will afford the Lead Underwriter a reasonable
          opportunity to comment on any such proposed amendment or supplement;
          and the Company will also advise the Lead Underwriter promptly of the
          filing of any such amendment or supplement and of the institution by
          the Commission of any stop order proceedings in respect of the
          Registration Statement or of any part thereof and will use its best
          efforts to prevent the issuance of any such stop order and to obtain
          as soon as possible its lifting, if issued.

                 (c) If, at any time when a prospectus relating to the Offered
          Securities is required to be delivered under the Act in connection
          with sales by any Underwriter or dealer, any event occurs as a result
          of which the Prospectus as then amended or supplemented would include
          an untrue statement of a material fact or omit to state any material
          fact necessary to make the statements therein, in the light of the
          circumstances under which they were made, not misleading, or if it is
          necessary at any time to amend the Prospectus to comply with the Act,
          the Company promptly will notify the Lead Underwriter of such event
          and will promptly prepare and file with the Commission, at its own
          expense, an amendment or supplement which will correct such statement
          or omission or an amendment which will effect such compliance. Neither
          the Lead Underwriter's consent to, nor the Underwriters' delivery of,
          any such amendment or supplement shall constitute a waiver of any of
          the conditions set forth in Section 5 hereof.

                 (d) As soon as practicable, but not later than 16 months, after
          the date of each Terms Agreement, the Company will make generally
          available to its securityholders an earnings statement covering a
          period of at least 12 months beginning after the later of (i) the
          effective date of the registration statement relating to the
          Registered Securities, (ii) the effective date of the most recent
          post-effective amendment to the Registration Statement to become
          effective prior to the date of such Terms Agreement and (iii) the date
          of


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<PAGE>   7

          the Company's most recent Annual Report on Form 10-K filed with the
          Commission prior to the date of such Terms Agreement, which will
          satisfy the provisions of Section 11(a) of the Act.

                 (e) The Company will furnish to the Representatives copies of
          the Registration Statement, including all exhibits, any related
          preliminary prospectus, any related preliminary prospectus supplement,
          the Prospectus and all amendments and supplements to such documents,
          in each case as soon as available and in such quantities as the Lead
          Underwriter reasonably requests. The Company will pay the expenses of
          printing and distributing to the Underwriters all such documents.

                 (f) The Company will arrange for the qualification of the
          Offered Securities for sale and (if the Offered Securities are debt
          securities or preferred stock) the determination of their eligibility
          for investment under the laws of such jurisdictions as the Lead
          Underwriter designates and will continue such qualifications in effect
          so long as required for the distribution.

                 (g) During the period of five years after the date of any Terms
          Agreement, the Company will furnish to the Representatives and, upon
          request, to each of the other Underwriters, if any, as soon as
          practicable after the end of each fiscal year, a copy of its annual
          report to stockholders for such year; and the Company will furnish to
          the Representatives (i) as soon as available, a copy of each report
          and any definitive proxy statement of the Company filed with the
          Commission under the Securities Exchange Act of 1934 or mailed to
          stockholders, and (ii) from time to time, such other information
          concerning the Company as the Lead Underwriter may reasonably request.

                 (h) The Company will pay all expenses incident to the
          performance of its obligations under the Terms Agreement (including
          the provisions of this Agreement), for any filing fees or other
          expenses (including fees and disbursements of counsel) in connection
          with qualification of the Registered Securities for sale and (if the
          Offered Securities are debt securities or preferred stock) any
          determination of their eligibility for investment under the laws of
          such jurisdictions as the Lead Underwriter may designate and the
          printing of memoranda relating thereto, for any fees charged by
          investment rating agencies for the rating of the Offered Securities
          (if they are debt securities or preferred stock), for any applicable
          filing fee incident to, and the reasonable fees and disbursements of
          counsel for the Underwriters in connection with, the review by the
          National Association of Securities Dealers, Inc. of the Registered
          Securities, for any travel expenses of the Company's officers and
          employees and any other expenses of the Company in connection with
          attending or hosting meetings with prospective purchasers of
          Registered Securities and for expenses incurred in distributing the
          Prospectus, any preliminary prospectuses, any preliminary prospectus
          supplements or any other amendments or supplements to the Prospectus
          to the Underwriters.

                 (i) If the Offered Securities are debt securities or preferred
          stock, the Company will not offer, sell, contract to sell, pledge or
          otherwise dispose of, directly or indirectly, or file with the
          Commission a registration statement under the Act relating to United
          States dollar-denominated debt securities issued or guaranteed by the
          Company and having a maturity of more than one year from the date of
          issue (if the Offered Securities are debt securities) or any series of
          preferred stock issued or guaranteed by the Company (if the Offered
          Securities are preferred stock), or publicly disclose the intention to
          make any such offer, sale, pledge, disposition or filing, without the
          prior written consent of the Lead Underwriter for a period beginning
          at the time of execution of the Terms Agreement and ending the number
          of days after the Closing Date specified under "Blackout" in the Terms
          Agreement.

                 (j) If the Offered Securities are Common Stock or are
          convertible into Common Stock, the Company will not offer, sell,
          contract to sell, pledge or otherwise dispose of, directly or
          indirectly, or file with the Commission a registration statement under
          the Act relating to, any additional shares of its


                                      -7-
<PAGE>   8

          Common Stock or securities convertible into or exchangeable or
          exercisable for any shares of its Common Stock, or publicly disclose
          the intention to make any such offer, sale, pledge, disposition or
          filing, without the prior written consent of the Lead Underwriter for
          a period beginning at the time of execution of the Terms Agreement and
          ending the number of days after the Closing Date specified under
          "Blackout" in the Terms Agreement, except issuances of Common Stock
          pursuant to the conversion or exchange of convertible or exchangeable
          securities or the exercise of warrants or options, in each case
          outstanding on the date of the Terms Agreement, grants of employee
          stock options pursuant to the terms of a plan in effect on the date of
          the Terms Agreement, issuances of Common Stock pursuant to the
          exercise of such options in connection with mergers, acquisitions
          (including technology acquisitions) or similar transactions.

        5. Conditions of the Obligations of the Underwriters. The obligations of
the several Underwriters to purchase and pay for the Offered Securities will be
subject to the accuracy of the representations and warranties on the part of the
Company herein, to the accuracy of the statements of Company officers made
pursuant to the provisions hereof, to the performance by the Company of its
obligations hereunder and to the following additional conditions precedent:

                 (a) On or prior to the date of the Terms Agreement, the
          Representatives shall have received a letter, dated the date of
          delivery thereof, of Ernst & Young LLP confirming that they are
          independent public accountants within the meaning of the Act and the
          applicable published Rules and Regulations thereunder and stating to
          the effect that:

                    (i) in their opinion the financial statements and any
              schedules and any summary of earnings examined by them and
              included in the Prospectus comply as to form in all material
              respects with the applicable accounting requirements of the Act
              and the related published Rules and Regulations;

                    (ii) they have performed the procedures specified by the
              American Institute of Certified Public Accountants for a review of
              interim financial information as described in Statement of
              Auditing Standards No. 71, Interim Financial Information, on any
              unaudited financial statements included in the Registration
              Statement;

                    (iii) on the basis of the review referred to in clause (ii)
              above, a reading of the latest available interim financial
              statements of the Company, inquiries of officials of the Company
              who have responsibility for financial and accounting matters and
              other specified procedures, nothing came to their attention that
              caused them to believe that:

                         (A) the unaudited financial statements, if any, and any
                  summary of earnings included in the Prospectus do not comply
                  as to form in all material respects with the applicable
                  accounting requirements of the Act and the related published
                  Rules and Regulations or any material modifications should be
                  made to such unaudited financial statements and summary of
                  earnings for them to be in conformity with generally accepted
                  accounting principles;

                         (B) if any unaudited "capsule" information is contained
                  in the Prospectus, the unaudited consolidated net sales, net
                  operating income, net income and net income per share amounts
                  or other amounts constituting such "capsule" information and
                  described in such letter do not agree with the corresponding
                  amounts set forth in the unaudited consolidated financial
                  statements or were not determined on a basis substantially
                  consistent with that of the corresponding amounts in the
                  audited statements of income;

                         (C) at the date of the latest available balance sheet
                  read by such accountants, or at a subsequent specified date
                  not more than three business days prior to the date of the
                  such letter,


                                      -8-
<PAGE>   9

                  there was any change in the capital stock or any increase in
                  short-term indebtedness or long-term debt of the Company and
                  its consolidated subsidiaries or, at the date of the latest
                  available balance sheet read by such accountants, there was
                  any decrease in consolidated net current assets or net assets,
                  as compared with amounts shown on the latest balance sheet
                  included in the Prospectus; or

                         (D) for the period from the closing date of the latest
                  income statement included in the Prospectus to the closing
                  date of the latest available income statement read by such
                  accountants there were any decreases, as compared with the
                  corresponding period of the previous year and with the period
                  of corresponding length ended the date of the latest income
                  statement included in the Prospectus, in consolidated net
                  sales, net operating income in the total or (if the Offered
                  Securities are Common Stock or are convertible into Common
                  Stock) per share amounts of consolidated income before
                  extraordinary items or net income (if the Offered Securities
                  are debt securities) in the ratio of earnings to fixed charges
                  or (if the Offered Securities are preferred stock) in the
                  ratio of earnings to fixed charges and preferred stock
                  dividends combined;

                    except in all cases set forth in clauses (C) and (D) above
              for changes, increases or decreases which the Prospectus discloses
              have occurred or may occur or which are described in such letter;
              and

                    (iv) they have compared specified dollar amounts (or
              percentages derived from such dollar amounts) and other financial
              information contained in the Prospectus (in each case to the
              extent that such dollar amounts, percentages and other financial
              information are derived from the general accounting records of the
              Company and its subsidiaries subject to the internal controls of
              the Company's accounting system or are derived directly from such
              records by analysis or computation) with the results obtained from
              inquiries, a reading of such general accounting records and other
              procedures specified in such letter and have found such dollar
              amounts, percentages and other financial information to be in
              agreement with such results, except as otherwise specified in such
              letter.

          All financial statements and schedules included in material
          incorporated by reference into the Prospectus shall be deemed included
          in the Prospectus for purposes of this subsection.

                 (b) The Prospectus shall have been filed with the Commission in
          accordance with the Rules and Regulations and Section 4(a) of this
          Agreement. No stop order suspending the effectiveness of the
          Registration Statement or of any part thereof shall have been issued
          and no proceedings for that purpose shall have been instituted or, to
          the knowledge of the Company or any Underwriter, shall be contemplated
          by the Commission.

                 (c) Subsequent to the execution of the Terms Agreement, there
          shall not have occurred (i) any change, or any development or event
          involving a prospective change, in the condition (financial or other),
          business, properties or results of operations of the Company and its
          subsidiaries taken as one enterprise which, in the judgment of a
          majority in interest of the Underwriters including any
          Representatives, is material and adverse and makes it impractical or
          inadvisable to proceed with completion of the public offering or the
          sale of and payment for the Offered Securities; (ii) any downgrading
          in the rating of any debt securities of the Company by any "nationally
          recognized statistical rating organization" (as defined for purposes
          of Rule 436(g) under the Act), or any public announcement that any
          such organization has under surveillance or review its rating of any
          debt securities of the Company (other than an announcement with
          positive implications of a possible upgrading, and no implication of a
          possible downgrading, of such rating); (iii) any material suspension
          or material limitation of trading in securities generally on the New
          York Stock Exchange or any setting of minimum prices for trading on
          such exchange, or any suspension


                                      -9-
<PAGE>   10

          of trading of any securities of the Company on any exchange or in the
          over-the-counter market; (iv) any banking moratorium declared by U.S.
          Federal or New York authorities; or (v) any outbreak or escalation of
          major hostilities in which the United States is involved, any
          declaration of war by Congress or any other substantial national or
          international calamity or emergency if, in the judgment of a majority
          in interest of the Underwriters including any Representatives, the
          effect of any such outbreak, escalation, declaration, calamity or
          emergency makes it impractical or inadvisable to proceed with
          completion of the public offering or the sale of and payment for the
          Offered Securities.

                 (d) The Representatives shall have received an opinion, dated
          the Closing Date, of Piper Marbury Rudnick & Wolfe LLP, counsel for
          the Company, to the effect that:

                    (i) The Company has been duly incorporated and is an
              existing corporation in good standing under the laws of the State
              of Delaware, with corporate power and authority to own its
              properties and conduct its business as described in the
              Prospectus; and the Company is duly qualified to do business as a
              foreign corporation in good standing in all other jurisdictions in
              which its ownership or lease of property or the conduct of its
              business requires such qualification except where the failure to
              so qualify would not have a Material Adverse Effect;

                    (ii) If the Offered Securities are debt securities: The
              Indenture has been duly authorized, executed and delivered by the
              Company and has been duly qualified under the Trust Indenture Act;
              the Offered Securities have been duly authorized; the Offered
              Securities other than any Contract Securities have been duly
              executed, authenticated, issued and delivered; the Indenture and
              the Offered Securities other than any Contract Securities
              constitute, and any Contract Securities, when executed,
              authenticated, issued and delivered in the manner provided in the
              Indenture and sold pursuant to Delayed Delivery Contracts, will
              constitute, valid and legally binding obligations of the Company
              enforceable in accordance with their terms, subject to bankruptcy,
              insolvency, fraudulent transfer, reorganization, moratorium and
              similar laws of general applicability relating to or affecting
              creditors' rights and to general equity principles; and the
              Offered Securities other than any Contract Securities conform, and
              any Contract Securities, when so issued and delivered and sold
              will conform, to the description thereof contained in the
              Prospectus;

                    (iii) If the Offered Securities are preferred stock: The
              Offered Securities have been duly authorized; the Offered
              Securities other than any Contract Securities have been validly
              issued and are fully paid and nonassessable; any Contract
              Securities, when issued, delivered and sold pursuant to Delayed
              Delivery Contracts, will be validly issued, fully paid and
              non-assessable; and the Offered Securities other than any Contract
              Securities conform, and any Contract Securities, when so issued,
              delivered and sold, will conform, to the description thereof
              contained in the Prospectus; and the stockholders of the Company
              have no preemptive rights with respect to the Offered Securities
              under the Company's certificate of incorporation, by-laws or the
              Delaware General Corporation Law, or to the knowledge of such
              counsel, under any other document or agreement to which the
              Company is a party, other than any such preemptive rights waived
              by the holder thereof;

                    (iv) If the Offered Securities are Common Stock: The Offered
              Securities have been duly authorized and validly issued, are fully
              paid and nonassessable and conform to the description thereof
              contained in the Prospectus; and the stockholders of the Company
              have no preemptive rights with respect to the Offered Securities
              under the Company's certificate of incorporation, by-laws or the
              Delaware General Corporation Law, or to the knowledge of such
              counsel, under any other document or agreement to which the
              Company is a party, other than any such preemptive rights waived
              by the holder thereof;

                    (v) If the Offered Securities are convertible: the Offered
              Securities other than any Contract Securities are, and any
              Contract Securities, when (if the Offered Securities are debt
              securities)


                                      -10-
<PAGE>   11

               executed, authenticated, issued and delivered in the manner
               provided in the Indenture and sold pursuant to Delayed Delivery
               Contracts or (if the Offered Securities are preferred stock) when
               issued, delivered and sold pursuant to Delayed Delivery
               Contracts, will be convertible into Common Stock of the Company
               in accordance with (if they are debt securities) the Indenture or
               (if they are preferred stock) their terms; the shares of Common
               Stock initially issuable upon conversion of the Offered
               Securities have been duly authorized and reserved for issuance
               upon such conversion and, when issued upon such conversion, will
               be validly issued, fully paid and nonassessable; and the
               stockholders of the Company have no preemptive rights with
               respect to the Common Stock under the Company's certificate of
               incorporation, by-laws or the Delaware General Corporation Law,
               or to the knowledge of such counsel, under any other document or
               agreement to which the Company is a party, other than any such
               preemptive rights waived by the holder thereof;

                    (vi) The Company is not and, after giving effect to the
              offering and sale of the Offered Securities and the application of
              the proceeds thereof as described in the Prospectus, will not be
              an "investment company" as defined in the Investment Company Act
              of 1940;

                    (vii) No consent, approval, authorization or order of, or
              filing with, any governmental agency or body or any court is
              required for the consummation of the transactions contemplated by
              the Terms Agreement (including the provisions of this Agreement)
              in connection with the issuance or sale of the Offered Securities
              by the Company, except such as have been obtained and made under
              the Act and, if the Offered Securities are debt securities, the
              Trust Indenture Act and such as may be required under state
              securities laws;

                    (viii) The execution, delivery and performance of the
              Indenture (if the Offered Securities are debt securities), the
              Terms Agreement (including the provisions of this Agreement) and,
              if the Offered Securities are debt securities or preferred stock,
              any Delayed Delivery Contracts and the issuance and sale of the
              Offered Securities and, if the Offered Securities are debt
              securities or preferred stock, compliance with the terms and
              provisions thereof will not result in a breach or violation of any
              of the terms and provisions of, or constitute a default under, (A)
              any statute, any rule, regulation or order of any governmental
              agency or body or any court having jurisdiction over the Company
              or any subsidiary of the Company or any of their properties, (B)
              to such counsel's knowledge, any agreement or instrument to which
              the Company or any such subsidiary is a party or by which the
              Company or any such subsidiary is bound or to which any of the
              properties of the Company or any such subsidiary is subject, or
              (C) the charter or by-laws of the Company or any such subsidiary;
              and the Company has full power and authority to authorize, issue
              and sell the Offered Securities as contemplated by the Terms
              Agreement (including the provisions of this Agreement);

                    (ix) The Registration Statement has become effective under
              the Act, the Prospectus was filed with the Commission pursuant to
              the subparagraph of Rule 424(b) specified in such opinion on the
              date specified therein, and, to the best of the knowledge of such
              counsel, no stop order suspending the effectiveness of the
              Registration Statement or any part thereof has been issued and no
              proceedings for that purpose have been instituted or are pending
              or contemplated under the Act, and the registration statement
              relating to the Registered Securities, as of its effective date,
              the Registration Statement and the Prospectus, as of the date of
              the Terms Agreement, and any amendment or supplement thereto, as
              of its date, complied as to form in all material respects with the
              requirements of the Act, the Trust Indenture Act and the Rules and
              Regulations; including a statement to the effect that such counsel
              have no reason to believe that such registration statement, as of
              its effective date, the Registration Statement, as of the date of
              the Terms Agreement or as of the Closing Date, or any amendment
              thereto, as of its date or as of the Closing Date, contained any
              untrue statement of a material fact or omitted to state any
              material fact required to


                                      -11-
<PAGE>   12

              be stated therein or necessary to make the statements therein not
              misleading or that the Prospectus, as of the date of the Terms
              Agreement or as of such Closing Date, or any amendment or
              supplement thereto, as of its date or as of the Closing Date,
              contained any untrue statement of a material fact or omitted to
              state any material fact necessary in order to make the statements
              therein, in the light of the circumstances under which they were
              made, not misleading, provided that, with respect to such
              statements, such counsel may state that the belief is based upon
              the procedures set forth therein, but is without independent check
              or verification; the descriptions under the caption
              "Description of Securities" or similar caption in the Registration
              Statement and Prospectus of contracts and other documents
              described therein are accurate and fairly present the information
              required to be shown; and such counsel do not know of any legal or
              governmental proceedings required to be described in the
              Prospectus which are not described as required or of any contracts
              or documents of a character required to be described in the
              Registration Statement or Prospectus or to be filed as exhibits to
              the Registration Statement which are not described and filed as
              required; it being understood that such counsel need express no
              opinion as to the financial statements or other financial data
              contained in the Registration Statement or the Prospectus; and

                    (x) The Terms Agreement (including the provisions of this
              Agreement) and, if the Offered Securities are debt securities or
              preferred stock, any Delayed Delivery Contracts have been duly
              authorized, executed and delivered by the Company.

                 (e) The Representatives shall have received an opinion, dated
          the Closing Date, of James H. Davis, Senior Vice President and General
          Counsel of the Company, to the effect that:

                    (i) If the Offered Securities are Common Stock or are
              convertible: The outstanding shares of Common Stock have been duly
              authorized and validly issued, are fully paid and nonassessable
              and conform to the description thereof contained in the
              Prospectus;

                    (ii) the statements in the Prospectus describing patent and
              intellectual property matters in all materials respects are
              accurate statements or summaries of the matters set forth therein;

                    (iii) to such counsel's knowledge, the Company has not
              received any notice (written or oral) of infringement of or
              interference with the asserted rights of any other person with
              respect to any intellectual property rights that, if determined
              adversely to the Company, would individually or in the aggregate
              have a Material Adverse Effect on the Company;

                    (iv) the descriptions in the Prospectus of statutes
              (excluding Federal tax and Federal and state securities laws),
              legal and governmental proceedings, and contracts relevant to the
              Company and its business in all material respects are accurate
              statements or summaries of the matters set forth therein; and

                    (v) as to the matters set forth under subparagraphs (ii),
              (iii), (iv), (v), (viii) and (ix) to paragraph (d) of this Section
              5.

                 (f)  The Representatives shall have received
          from , counsel for the Underwriters, such opinion or opinions, dated
          the Closing Date, with respect to the incorporation of the Company,
          the validity of the Offered Securities, the Registration Statement,
          the Prospectus and other related matters as the Representatives may
          require, and the Company shall have furnished to such counsel such
          documents as they request for the purpose of enabling them to pass
          upon such matters.

                 (g) The Representatives shall have received a certificate,
          dated the Closing Date, of the President or any Vice President and a
          principal financial or accounting officer of the Company in which such



                                      -12-
<PAGE>   13

          officers, to the best of their knowledge after reasonable
          investigation, shall state that the representations and warranties of
          the Company in this Agreement are true and correct, that the Company
          has complied with all agreements and satisfied all conditions on its
          part to be performed or satisfied hereunder at or prior to the Closing
          Date, that no stop order suspending the effectiveness of the
          Registration Statement or of any part thereof has been issued and no
          proceedings for that purpose have been instituted or are contemplated
          by the Commission and that, subsequent to the date of the most recent
          financial statements in the Prospectus, there has been no material
          adverse change, nor any development or event involving a prospective
          material adverse change, in the condition (financial or other),
          business, properties or results of operations of the Company and its
          subsidiaries taken as a whole except as set forth in or contemplated
          by the Prospectus or as described in such certificate.

                 (h) The Representatives shall have received a letter, dated the
          Closing Date, of Ernst &Young LLP which meets the requirements of
          subsection (a) of this Section, except that the specified date
          referred to in such subsection will be a date not more than three days
          prior to the Closing Date for the purposes of this subsection.

The Company will furnish the Representatives with such conformed copies of such
opinions, certificates, letters and documents as the Representatives reasonably
request. The Lead Underwriter may in its sole discretion waive on behalf of the
Underwriters compliance with any conditions to the obligations of the
Underwriters under this Agreement and the Terms Agreement.

        6.  Indemnification and Contribution.

                 (a) The Company will indemnify and hold harmless each
          Underwriter, its partners, directors and officers and each person, if
          any, who controls such Underwriter within the meaning of Section 15 of
          the Act, against any losses, claims, damages or liabilities, joint or
          several, to which such Underwriter may become subject, under the Act
          or otherwise, insofar as such losses, claims, damages or liabilities
          (or actions in respect thereof) arise out of or are based upon any
          untrue statement or alleged untrue statement of any material fact
          contained in the Registration Statement, the Prospectus, or any
          amendment or supplement thereto, or any related preliminary prospectus
          or preliminary prospectus supplement, or arise out of or are based
          upon the omission or alleged omission to state therein a material fact
          required to be stated therein or necessary to make the statements
          therein not misleading, and will reimburse each Underwriter for any
          legal or other expenses reasonably incurred by such Underwriter in
          connection with investigating or defending any such loss, claim,
          damage, liability or action as such expenses are incurred; provided,
          however, that the Company will not be liable in any such case to the
          extent that any such loss, claim, damage or liability arises out of or
          is based upon an untrue statement or alleged untrue statement in or
          omission or alleged omission from any of such documents in reliance
          upon and in conformity with written information furnished to the
          Company by any Underwriter through the Representatives, if any,
          specifically for use therein, it being understood and agreed that the
          only such information furnished by any Underwriter consists of the
          information described as such in the Terms Agreement.

                 (b) Each Underwriter will severally and not jointly indemnify
          and hold harmless the Company, its directors and officers and each
          person, if any, who controls the Company within the meaning of Section
          15 of the Act, against any losses, claims, damages or liabilities to
          which the Company may become subject, under the Act or otherwise,
          insofar as such losses, claims, damages or liabilities (or actions in
          respect thereof) arise out of or are based upon any untrue statement
          or alleged untrue statement of any material fact contained in the
          Registration Statement, the Prospectus, or any amendment or supplement
          thereto, or any related preliminary prospectus or preliminary
          prospectus supplement, or arise out of or are based upon the omission
          or the alleged omission to state therein a material fact required to
          be stated therein or necessary to


                                      -13-
<PAGE>   14

          make the statements therein not misleading, in each case to the
          extent, but only to the extent, that such untrue statement or alleged
          untrue statement or omission or alleged omission was made in reliance
          upon and in conformity with written information furnished to the
          Company by such Underwriter through the Representatives, if any,
          specifically for use therein, and will reimburse any legal or other
          expenses reasonably incurred by the Company in connection with
          investigating or defending any such loss, claim, damage, liability or
          action as such expenses are incurred, it being understood and agreed
          that the only such information furnished by any Underwriter consists
          of the information described as such in the Terms Agreement.

                 (c) Promptly after receipt by an indemnified party under this
          Section of notice of the commencement of any action, such indemnified
          party will, if a claim in respect thereof is to be made against the
          indemnifying party under subsection (a) or (b) above, notify the
          indemnifying party of the commencement thereof; but the omission so to
          notify the indemnifying party will not relieve it from any liability
          which it may have to any indemnified party otherwise than under
          subsection (a) or (b) above. In case any such action is brought
          against any indemnified party and it notifies the indemnifying party
          of the commencement thereof, the indemnifying party will be entitled
          to participate therein and, to the extent that it may wish, jointly
          with any other indemnifying party similarly notified, to assume the
          defense thereof, with counsel satisfactory to such indemnified party
          (who shall not, except with the consent of the indemnified party, be
          counsel to the indemnifying party), and after notice from the
          indemnifying party to such indemnified party of its election so to
          assume the defense thereof, the indemnifying party will not be liable
          to such indemnified party under this Section for any legal or other
          expenses subsequently incurred by such indemnified party in connection
          with the defense thereof other than reasonable costs of investigation.
          No indemnifying party shall, without the prior written consent of the
          indemnified party, effect any settlement of any pending or threatened
          action in respect of which any indemnified party is or could have been
          a party and indemnity could have been sought hereunder by such
          indemnified party unless such settlement (i) includes an unconditional
          release of such indemnified party from all liability on any claims
          that are the subject matter of such action and (ii) does not include a
          statement as to, or an admission of, fault, culpability or a failure
          to act by or behalf of an indemnified party.

                 (d) If the indemnification provided for in this Section is
          unavailable or insufficient to hold harmless an indemnified party
          under subsection (a) or (b) above, then each indemnifying party shall
          contribute to the amount paid or payable by such indemnified party as
          a result of the losses, claims, damages or liabilities referred to in
          subsection (a) or (b) above (i) in such proportion as is appropriate
          to reflect the relative benefits received by the Company on the one
          hand and the Underwriters on the other from the offering of the
          Offered Securities or (ii) if the allocation provided by clause (i)
          above is not permitted by applicable law, in such proportion as is
          appropriate to reflect not only the relative benefits referred to in
          clause (i) above but also the relative fault of the Company on the one
          hand and the Underwriters on the other in connection with the
          statements or omissions which resulted in such losses, claims, damages
          or liabilities as well as any other relevant equitable considerations.
          The relative benefits received by the Company on the one hand and the
          Underwriters on the other shall be deemed to be in the same proportion
          as the total net proceeds from the offering (before deducting
          expenses) received by the Company bear to the total underwriting
          discounts and commissions received by the Underwriters. The relative
          fault shall be determined by reference to, among other things, whether
          the untrue or alleged untrue statement of a material fact or the
          omission or alleged omission to state a material fact relates to
          information supplied by the Company or the Underwriters and the
          parties' relative intent, knowledge, access to information and
          opportunity to correct or prevent such untrue statement or omission.
          The amount paid by an indemnified party as a result of the losses,
          claims, damages or liabilities referred to in the first sentence of
          this subsection (d) shall be deemed to include any legal or other
          expenses reasonably incurred by such indemnified party in connection
          with investigating or defending any action or claim which is the


                                      -14-
<PAGE>   15

          subject of this subsection (d). Notwithstanding the provisions of this
          subsection (d), no Underwriter shall be required to contribute any
          amount in excess of the amount by which the total price at which the
          Offered Securities underwritten by it and distributed to the public
          were offered to the public exceeds the amount of any damages which
          such Underwriter has otherwise been required to pay by reason of such
          untrue or alleged untrue statement or omission or alleged omission. No
          person guilty of fraudulent misrepresentation (within the meaning of
          Section 11(f) of the Act) shall be entitled to contribution from any
          person who was not guilty of such fraudulent misrepresentation. The
          Underwriters' obligations in this subsection (d) to contribute are
          several in proportion to their respective underwriting obligations and
          not joint.

                 (e) The obligations of the Company under this Section shall be
          in addition to any liability which the Company may otherwise have and
          shall extend, upon the same terms and conditions, to each person, if
          any, who controls any Underwriter within the meaning of the Act; and
          the obligations of the Underwriters under this Section shall be in
          addition to any liability which the respective Underwriters may
          otherwise have and shall extend, upon the same terms and conditions,
          to each director of the Company, to each officer of the Company who
          has signed the Registration Statement and to each person, if any, who
          controls the Company within the meaning of the Act.

        7. Default of Underwriters. If any Underwriter or Underwriters default
in their obligations to purchase Offered Securities under the Terms Agreement
and the aggregate principal amount (if debt securities) or number of shares (if
preferred stock or Common Stock) of Offered Securities that such defaulting
Underwriter or Underwriters agreed but failed to purchase does not exceed 10% of
the total principal amount (if debt securities) or number of shares (if
preferred stock or Common Stock) of Offered Securities, the Lead Underwriter may
make arrangements satisfactory to the Company for the purchase of such Offered
Securities by other persons, including any of the Underwriters, but if no such
arrangements are made by the Closing Date, the non-defaulting Underwriters shall
be obligated severally, in proportion to their respective commitments under the
Terms Agreement (including the provisions of this Agreement), to purchase the
Offered Securities that such defaulting Underwriters agreed but failed to
purchase. If any Underwriter or Underwriters so default and the aggregate
principal amount (if debt securities) or number of shares (if preferred stock or
Common Stock) of Offered Securities with respect to which such default or
defaults occur exceeds 10% of the total principal amount (if debt securities) or
number of shares (if preferred stock or Common Stock) of Offered Securities and
arrangements satisfactory to the Lead Underwriter and the Company for the
purchase of such Offered Securities by other persons are not made within 36
hours after such default, the Terms Agreement will terminate without liability
on the part of any non-defaulting Underwriter or the Company, except as provided
in Section 8. As used in this Agreement, the term "Underwriter" includes any
person substituted for an Underwriter under this Section. Nothing herein will
relieve a defaulting Underwriter from liability for its default. If the Offered
Securities are debt securities or preferred stock, the respective commitments of
the several Underwriters for the purposes of this Section shall be determined
without regard to reduction in the respective Underwriters' obligations to
purchase the principal amounts (if debt securities) or numbers of shares (if
preferred stock) of the Offered Securities set forth opposite their names in the
Terms Agreement as a result of Delayed Delivery Contracts entered into by the
Company.

        8. Survival of Certain Representations and Obligations. The respective
indemnities, agreements, representations, warranties and other statements of the
Company or its officers and of the several Underwriters set forth in or made
pursuant to the Terms Agreement (including the provisions of this Agreement)
will remain in full force and effect, regardless of any investigation, or
statement as to the results thereof, made by or on behalf of any Underwriter,
the Company or any of their respective representatives, officers or directors or
any controlling person, and will survive delivery of and payment for the Offered
Securities. If the Terms Agreement is terminated pursuant to Section 7 or if for
any reason the purchase of the Offered Securities by the Underwriters is not
consummated, the Company shall remain responsible for the expenses to be paid or
reimbursed by it pursuant to Section 4 and the respective obligations of the
Company and the Underwriters pursuant to Section 6 shall remain in effect. If
the purchase of the Offered Securities by the Underwriters is not


                                      -15-
<PAGE>   16

consummated for any reason other than solely because of the termination of the
Terms Agreement pursuant to Section 7 or the occurrence of any event specified
in clause (iii), (iv) or (v) of Section 5(c), the Company will reimburse the
Underwriters for all out-of-pocket expenses (including fees and disbursements of
counsel) reasonably incurred by them in connection with the offering of the
Offered Securities.

        9. Notices. All communications hereunder will be in writing and, if sent
to the Underwriters, will be mailed, delivered or telegraphed and confirmed to
them at their address furnished to the Company in writing for the purpose of
communications hereunder or, if sent to the Company, will be mailed, delivered
or telegraphed and confirmed to it at Human Genome Sciences, Inc., 9410 Key West
Avenue, Rockville, Maryland 20850, Attention: James H. Davis, Senior Vice
President and General Counsel, with a copy to: Piper Marbury Rudnick & Wolfe
LLP, 6225 Smith Avenue, Baltimore, Maryland 21209, Attention: R.W. Smith, Jr.

        10. Successors. The Terms Agreement (including the provisions of this
Agreement) will inure to the benefit of and be binding upon the Company and such
Underwriters as are identified in the Terms Agreement and their respective
successors and the officers and directors and controlling persons referred to in
Section 6, and no other person will have any right or obligation hereunder.

        11. Representation of Underwriters. Any Representatives will act for the
several Underwriters in connection with the financing described in the Terms
Agreement, and any action under such Terms Agreement (including the provisions
of this Agreement) taken by the Representatives jointly or by the Lead
Underwriter will be binding upon all the Underwriters.

        12.  Counterparts.  The Terms Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original, but all such
counterparts shall together constitute one and the same Agreement.

        13. APPLICABLE LAW. THIS AGREEMENT AND THE TERMS AGREEMENT SHALL BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS.

        The Company hereby submits to the non-exclusive jurisdiction of the
Federal and state courts in the Borough of Manhattan in The City of New York in
any suit or proceeding arising out of or relating to the Terms Agreement
(including the provisions of this Agreement) or the transactions contemplated
thereby.


                                      -16-
<PAGE>   17



                                                                         ANNEX I


                            DELAYED DELIVERY CONTRACT


                                                                         , 20
                                                            -------------    --


HUMAN GENOME SCIENCES, INC.

   c/o
        ----------------------------

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

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

     Attention:
                -----------------------------------


Gentlemen:

    The undersigned hereby agrees to purchase from Human Genome Sciences, Inc.,
a Delaware corporation ("COMPANY"), and the Company agrees to sell to the
undersigned,

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

of the Company's ____________________________("SECURITIES"), offered by the
Company's Prospectus dated , 20___ and a Prospectus Supplement dated , 2000
relating thereto, receipt of copies of which is hereby acknowledged, at
____________ and on the further terms and conditions set forth in this Delayed
Delivery Contract ("CONTRACT").

    The undersigned will purchase from the Company as of the date hereof, for
delivery on the dates set forth below, Securities in the amounts set forth
below:

<TABLE>
<CAPTION>
                DELIVERY DATE                                        AMOUNT
                -------------                                        ------
<S>                                              <C>

           ...............................                       .............

           ...............................                       .............
</TABLE>

Each of such delivery dates is hereinafter referred to as a Delivery Date.

    Payment for the Securities that the undersigned has agreed to purchase for
delivery on each Delivery Date shall be made to the Company or its order in
Federal (same day) funds by certified or official bank check or wire transfer to
an account designated by the Company at a bank acceptable to the Lead
Underwriter, at the office of              at     A.M. on the Delivery Date upon
delivery to the undersigned of the Securities to be purchased by the undersigned
for delivery on such Delivery Date in definitive form and in such denominations
and registered in such names as the undersigned may designate by written or
telegraphic communication addressed to the Company not less than five full
business days prior to such Delivery Date.




                                       A-1
<PAGE>   18

    It is expressly agreed that the provisions for delayed delivery and payment
are for the sole convenience of the undersigned; that the purchase hereunder of
Securities is to be regarded in all respects as a purchase as of the date of
this Contract; that the obligation of the Company to make delivery of and accept
payment for, and the obligation of the undersigned to take delivery of and make
payment for, Securities on each Delivery Date shall be subject only to the
conditions that (1) investment in the Securities shall not at such Delivery Date
be prohibited under the laws of any jurisdiction in the United States to which
the undersigned is subject and (2) the Company shall have sold to the
Underwriters the total amount of the Securities less the amount thereof covered
by this and other similar Contracts. The undersigned represents that its
investment in the Securities is not, as of the date hereof, prohibited under the
laws of any jurisdiction to which the undersigned is subject and which governs
such investment.

    Promptly after completion of the sale to the Underwriters the Company will
mail or deliver to the undersigned at its address set forth below notice to such
effect, accompanied by copies of the opinions of counsel for the Company
delivered to the Underwriters in connection therewith.

    This Contract will inure to the benefit of and be binding upon the parties
hereto and their respective successors, but will not be assignable by either
party hereto without the written consent of the other.

    It is understood that the acceptance of any such Contract is in the
Company's sole discretion and, without limiting the foregoing, need not be on a
first-come, first-served basis. If this Contract is acceptable to the Company,
it is requested that the Company sign the form of acceptance below and mail or
deliver one of the counterparts hereof to the undersigned at its address set
forth below. This will become a binding contract between the Company and the
undersigned when such counterpart is so mailed or delivered.

                                        Yours very truly,


                                           ....................................
                                                     (Name of Purchaser)

                                           By  ................................

                                               ................................
                                                     (Title of Signatory)


                                               ................................

                                               ................................
                                                     (Address of Purchaser)

Accepted, as of the above date.

HUMAN GENOME SCIENCES, INC.


By
   ....................................


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