Document:

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                                    FORM OF
                       WARRANT FOR PURCHASE OF SHARES OF
                                COMMON STOCK OF
                               LSC, INCORPORATED

                                 March 15, 1999

         For value received, ____________________, or his registered assigns
(the "Holder"), is entitled to purchase from LSC, Incorporated, a Minnesota
corporation (the "Company"), at any time on or before March 15, 2004,
______________________________ (_____) fully paid and nonassessable shares of
the Company's Common Stock, $.01 par value (such class of stock being
hereinafter referred to as the "Common Stock" and such Common Stock as may be
acquired upon exercise hereof being hereinafter referred to as the "Warrant
Stock"), at an exercise price equal to the lesser of (a) $3.20 per share or (b)
80% of the per share price of the Company's next equity financing that raises
gross proceeds of at least two hundred fifty thousand dollars ($250,000), if
such financing occurs on or before December 31, 2000.

         This Warrant is subject to the terms and provisions of, the
Contribution and Security Agreement, dated as of May 15, 1998, among the Company
and the other parties thereto (the "Agreement"). The provisions of the Agreement
are incorporated herein by reference with the same force and effect as if fully
set forth herein.

         This Warrant is subject to the following provisions, terms and
conditions:

            1. The rights represented by this Warrant may be exercised by the
Holder, in whole or in part (but not as to a fractional share of Common Stock),
by written notice of exercise delivered to the Company accompanied by the
surrender of this Warrant (properly endorsed if required) at the principal
office of the Company and upon payment to it, by cash, certified check or bank
draft, of the warrant exercise price for such shares. In addition, the Holder
may elect to pay the full purchase price by receiving a number of shares of
Common Stock computed using the following formula:

                  X = Y(A-B)
                      ------
                        A

Where:            X = the number of shares of Common Stock to be issued to the
                      Holder.

                  Y = the number of shares of Common Stock as to which this
                      Warrant is being exercised.

                  A = the Fair Market Value of one share of Common Stock.

                  B = Warrant Exercise Price.

         "Fair Market Value" means, with respect to the Company's Common Stock,
as of any date:

                  (a) if the Common Stock is listed or admitted to unlisted
         trading privileges on any national securities exchange or is not so
         listed or admitted but transactions in the

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         Common Stock are reported on the Nasdaq National Market, the reported
         closing price of the Common Stock on such exchange or by the Nasdaq
         National Market as of such date (or, if no shares were traded on such
         day, as of the next preceding day on which there was such a trade); or

                  (b) if the Common Stock is not so listed or admitted to
         unlisted trading privileges or reported on the Nasdaq National Market,
         and bid and asked prices therefor in the over-the-counter market are
         reported by Nasdaq or National Quotation Bureau, Inc. (or any
         comparable reporting service), the mean of the closing bid and asked
         prices as of such date, as so reported by Nasdaq or, if not so reported
         thereon, as reported by National Quotation Bureau, Inc. (or such
         comparable reporting service); or

                  (c) if the Common Stock is not so listed or admitted to
         unlisted trading privileges, or reported on the Nasdaq National Market,
         and such bid and asked prices are not so reported by Nasdaq or National
         Quotation Bureau, Inc. (or any comparable reporting service), such
         price as the Company's Board of Directors determines in good faith in
         the exercise of its reasonable discretion.

         The Company agrees that the Warrant Stock so purchased shall be and are
deemed to be issued as of the close of business on the date on which this
Warrant shall have been surrendered and payment made for such Warrant Stock as
aforesaid. Certificates for the shares of Warrant Stock so purchased shall be
delivered to the Holder within 15 days after the rights represented by this
Warrant shall have been so exercised, and, unless this Warrant has expired, a
new Warrant representing the number of Warrant Stock, if any, with respect to
which this Warrant has not been exercised shall also be delivered to the Holder
within such time. Notwithstanding the foregoing, however, the Company shall not
be required to deliver any certificates for the Warrant Stock, except in
accordance with the provisions and subject to the limitations of Section 5
below.

            2. The Company covenants and agrees that all shares of Warrant Stock
that may be issued upon the exercise of this Warrant will, upon issuance, be
duly authorized and issued, fully paid and nonassessable and free from all
taxes, liens and charges with respect to the issuance thereof. The Company
further covenants and agrees that until expiration of this Warrant, the Company
will at all times have authorized, and reserved for the purpose of issuance or
transfer upon exercise of this Warrant, a sufficient number of shares of Common
Stock to provide for the exercise of this Warrant.

            3. The foregoing provisions are, however, subject to the following:

                     (a) The Warrant exercise price shall be subject to
         adjustment from time to time as hereinafter provided. Upon each
         adjustment of the Warrant exercise price, the holder of this Warrant
         shall thereafter be entitled to purchase, at the Warrant exercise price
         resulting from such adjustment, the number of shares obtained by
         multiplying the Warrant exercise price in effect immediately prior to
         such adjustment by the number of shares purchasable pursuant hereto
         immediately prior to such adjustment and dividing the product thereof
         by the Warrant exercise price resulting from such adjustment.

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                     (b) In case the Company shall at any time subdivide the
         outstanding Common Stock into a greater number of shares or declare a
         dividend payable in Common Stock, the Warrant exercise price in effect
         immediately prior to such subdivision shall be proportionately reduced,
         and conversely, in case the outstanding Common Stock shall be combined
         into a smaller number of shares, the Warrant exercise price in effect
         immediately prior to such combination shall be proportionately
         increased.

                     (c) If any capital reorganization or reclassification of
         the capital stock of the Company, or consolidation or merger of the
         Company with another corporation, or the sale of all or substantially
         all of its assets to another corporation shall be effected in such a
         way that holders of Common Stock shall be entitled to receive stock,
         securities or assets ("substituted property") with respect to or in
         exchange for such Common Stock, then, as a condition of such
         reorganization, reclassification, consolidation, merger or sale, the
         Holder shall have the right to purchase and receive upon the basis and
         upon the terms and conditions specified in this Warrant and in lieu of
         the Common Stock of the Company immediately theretofore purchasable and
         receivable upon the exercise of the rights represented hereby, such
         substituted property as would have been issued or delivered to the
         Holder if it had exercised this Warrant and had received upon exercise
         of this Warrant the Common Stock prior to such reorganization,
         reclassification, consolidation, merger or sale. The Company shall not
         effect any such consolidation, merger or sale, unless prior to the
         consummation thereof the successor corporation (if other than the
         Company) resulting from such consolidation or merger or the corporation
         purchasing such assets shall assume by written instrument executed and
         mailed to the Holder at the last address of the Holder appearing on the
         books of the Company, the obligation to deliver to the Holder such
         shares of stock, securities or assets as, in accordance with the
         foregoing provisions, the Holder may be entitled to purchase.

                     (d) Upon any adjustment of the Warrant exercise price, the
         Company shall give written notice thereof, by first-class mail, postage
         prepaid, addressed to the Holder at the address of the Holder as shown
         on the books of the Company, which notice shall state the Warrant
         exercise price resulting from such adjustment and the increase or
         decrease, if any, in the number of shares purchasable at such price
         upon the exercise of this Warrant, setting forth in reasonable detail
         the method of calculation and the facts upon which such calculation is
         based.

            4. This Warrant shall not entitle the Holder to any voting rights or
other rights as a shareholder of the Company.

            5. The Holder, by acceptance hereof, represents and warrants that
(a) it is acquiring this Warrant for its own account for investment purposes
only and not with a view to its resale or distribution and (b) it has no present
intention to resell or otherwise dispose of all or any part of this Warrant.
Other than pursuant to registration under federal and state securities laws or
an exemption from such registration, the availability of which the Company shall
determine in its sole discretion, (y) the Company will not accept the exercise
of this Warrant or issue certificates for shares of Warrant Stock and (z)
neither this Warrant nor any shares of Warrant Stock may be sold, pledged,
assigned or otherwise disposed of (whether voluntarily or involuntarily). The
Company may condition such issuance or sale, pledge, assignment or other
disposition on the

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receipt from the party to whom this Warrant is to be so transferred or to whom
Warrant Stock is to be issued or so transferred of any representations and
agreements requested by the Company in order to permit such issuance or transfer
to be made pursuant to exemptions from registration under federal and applicable
state securities laws. Each certificate representing the Warrant (or any part
thereof) and any shares of Warrant Stock shall be stamped with appropriate
legends setting forth these restrictions on transferability. The Holder, by
acceptance hereof, agrees to give written notice to the Company before
exercising or transferring this Warrant or transferring any shares of Warrant
Stock of the Holder's intention to do so, describing briefly the manner of any
proposed exercise or transfer. Within thirty (30) days after receiving such
written notice, the Company shall notify the Holder as to whether such exercise
or transfer may be effected.

            6. This Warrant shall be transferable only on the books of the
Company by the Holder in person, or by duly authorized attorney, on surrender of
the Warrant, properly assigned.

            7. Neither this Warrant nor any term hereof may be changed, waived,
discharged or terminated orally but only by an instrument in writing signed by
the party against which enforcement of the change, waiver, discharge or
termination is sought.

         IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by
its duly authorized officer and to be dated as of the date set forth above.

                                      LSC, INCORPORATED

                                      By:
                                         ---------------------------------------
                                            J. B. Balogh
                                      Its: President and Chief Executive Officer

THE SECURITIES EVIDENCED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS. THESE SECURITIES HAVE BEEN
ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED FOR SALE, SOLD, PLEDGED, ASSIGNED
OR OTHERWISE DISPOSED OF, AND NO TRANSFER OF THE SECURITIES WILL BE MADE BY THE
COMPANY OR ITS TRANSFER AGENT, IN THE ABSENCE OF SUCH REGISTRATION OR AN OPINION
OF COUNSEL ACCEPTABLE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

                                       4<PAGE>

                                      FORM OF
                         WARRANT FOR PURCHASE OF SHARES OF
                                  COMMON STOCK OF
                                 LSC, INCORPORATED

                                   March 15, 1999

       For value received, ________________, or its registered assigns (the
"Holder"), is entitled to purchase from LSC, Incorporated., a Minnesota
corporation (the "Company"), at any time on or before March 14, 2004,
_______________ (_______) fully paid and nonassessable shares of the Company's
Common Stock, $.01 par value (such class of stock being hereinafter referred to
as the "Common Stock" and such Common Stock as may be acquired upon exercise
hereof being hereinafter referred to as the "Warrant Stock"), at the price equal
to the lesser of (a) $3.20 per share or (b) 80% of the per share price of the
Company's next equity financing that raises gross proceeds of at least two
hundred fifty thousand dollars ($250,000), if such financing occurs on or before
December 31, 2000 ("Warrant Exercise Price").

       This Warrant is described in, and is subject to the terms and provisions
of, the Bridge Loan Agreement, dated as of September 11, 1997, among the Company
and the investors named therein (the "Agreement").  The provisions of the
Agreement are incorporated herein by reference with the same force and effect as
if fully set forth herein.

       This Warrant is subject to the following provisions, terms and
conditions:

       1.     The rights represented by this Warrant may be exercised by the
Holder, in whole or in part (but not as to a fractional share of Common Stock),
by written notice of exercise delivered to the Company accompanied by the
surrender of this Warrant (properly endorsed if required) at the principal
office of the Company and upon payment to it, by cash, certified check or bank
draft, of the warrant exercise price for such shares.  In addition, the Holder
may elect to pay the full purchase price by receiving a number of shares of
Common Stock computed using the following formula:

              X = Y(A-B)
                  ------
                     A

Where:        X =    the number of shares of Common Stock to be issued to the
                     Holder.

              Y =    the number of shares of Common Stock as to which this
                     Warrant is being exercised.

              A =    the Fair Market Value of one share of Common Stock.

              B =    Warrant Exercise Price.

       "Fair Market Value" means, with respect to the Company's Common Stock, as
of any date:

              (a)    if the Common Stock is listed or admitted to unlisted
       trading privileges on any national securities exchange or is not so
       listed or admitted but transactions in the

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       Common Stock are reported on the Nasdaq National Market, the reported
       closing price of the Common Stock on such exchange or by the Nasdaq
       National Market as of such date (or, if no shares were traded on such
       day, as of the next preceding day on which there was such a trade); or

              (b)    if the Common Stock is not so listed or admitted to
       unlisted trading privileges or reported on the Nasdaq National Market,
       and bid and asked prices therefor in the over-the-counter market are
       reported by Nasdaq or National Quotation Bureau, Inc. (or any comparable
       reporting service), the mean of the closing bid and asked prices as of
       such date, as so reported by Nasdaq or, if not so reported thereon, as
       reported by National Quotation Bureau, Inc. (or such comparable reporting
       service); or

              (c)    if the Common Stock is not so listed or admitted to
       unlisted trading privileges, or reported on the Nasdaq National Market,
       and such bid and asked prices are not so reported by Nasdaq or National
       Quotation Bureau, Inc. (or any comparable reporting service), such price
       as the Company's Board of Directors determines in good faith in the
       exercise of its reasonable discretion.

       The Company agrees that the Warrant Stock so purchased shall be and are
deemed to be issued as of the close of business on the date on which this
Warrant shall have been surrendered and payment made for such Warrant Stock as
aforesaid.  Certificates for the shares of Warrant Stock so purchased shall be
delivered to the Holder within 15 days after the rights represented by this
Warrant shall have been so exercised, and, unless this Warrant has expired, a
new Warrant representing the number of Warrant Stock, if any, with respect to
which this Warrant has not been exercised shall also be delivered to the Holder
within such time.  Notwithstanding the foregoing, however, the Company shall not
be required to deliver any certificates for the Warrant Stock, except in
accordance with the provisions and subject to the limitations of Section 5
below.

       2.     The Company covenants and agrees that all shares of Warrant Stock
that may be issued upon the exercise of this Warrant will, upon issuance, be
duly authorized and issued, fully paid and nonassessable and free from all
taxes, liens and charges with respect to the issuance thereof.  The Company
further covenants and agrees that until expiration of this Warrant, the Company
will at all times have authorized, and reserved for the purpose of issuance or
transfer upon exercise of this Warrant, a sufficient number of shares of Common
Stock to provide for the exercise of this Warrant.

       3.     The foregoing provisions are, however, subject to the following:

              (a)    The Warrant Exercise Price shall be subject to adjustment
       from time to time as hereinafter provided.  Upon each adjustment of the
       Warrant Exercise Price, the holder of this Warrant shall thereafter be
       entitled to purchase, at the Warrant Exercise Price resulting from such
       adjustment, the number of shares obtained by multiplying the Warrant
       Exercise Price in effect immediately prior to such adjustment by the
       number of shares purchasable pursuant hereto immediately prior to such
       adjustment and dividing the product thereof by the Warrant Exercise Price
       resulting from such adjustment.

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              (b)    Except as provided in this Section 3, if and whenever the
       Company shall issue or sell any shares of its Common Stock for a
       consideration per share less than the Warrant Exercise Price in effect at
       the time of such issuance or sale, then, forthwith upon such issue or
       sale, the Warrant Exercise Price shall be reduced to such lesser price.

              (c)    Notwithstanding any other provision of this Section 3, the
       Warrant Exercise Price shall not be adjusted in the case of issuance by
       the Company of (i) shares of Common Stock issued upon exercise or
       conversion of any warrants, options, convertible securities or other
       rights to acquire shares of Common Stock outstanding on the date hereof,
       (ii) options to purchase shares of Common Stock (including shares of
       Common Stock issued upon the exercise thereof) granted or to be granted
       pursuant to the Company's existing stock option plan, as such plan is in
       effect on the date hereof or as may be amended by the Board of Directors,
       (iii) shares of Common Stock or options or other rights to purchase
       shares of Common Stock (including shares of Common Stock issued upon the
       exercise thereof) issued under employee benefit plans that the Company
       may adopt in the future including, but not limited to, stock purchase
       plans, profit sharing plans, stock option plans and stock incentive
       plans, (iv) shares of Common Stock issued upon exercise of warrants
       issued under the Agreement, or (v) shares of Common Stock issued upon
       conversion of convertible promissory notes issued under the Agreement.

              (d)    No adjustment of the Warrant Exercise Price, however, shall
       be made in an amount less than 1.0% of the Warrant Exercise Price in
       effect on the date of such adjustment, but any such lesser adjustment
       shall be carried forward and shall be made at the time and together with
       the next subsequent adjustment which, together with any such adjustment
       so carried forward, shall be an amount equal to or greater than 1.0% of
       the Warrant Exercise Price then in effect.

              (e)    For the purposes of this Section 3, the following
       provisions (i) to (iv), inclusive, shall also be applicable:

                     (i)    In case at any time the Company shall grant (whether
              directly or by assumption in a merger or otherwise) any rights to
              subscribe for or to purchase, or any options for the purchase of,
              (a) Common Stock or (b) any obligations or any shares of stock or
              other securities of the Company which are convertible into, or
              exchangeable for, Common Stock (any of such obligations or shares
              of stock or other securities being hereinafter called "Convertible
              Securities") whether or not such rights or options or the right to
              convert or exchange any such Convertible Securities are
              immediately exercisable, and the price per share for which Common
              Stock is issuable upon the exercise of such rights or options or
              upon conversion or exchange of such Convertible Securities
              (determined by dividing (x) the total amount, if any, received or
              receivable by the Company as consideration for the granting of
              such rights or options, plus the minimum aggregate amount of
              additional consideration payable to the Company upon the exercise
              of such rights or options, plus, in the case of such Convertible
              Securities, the minimum aggregate amount of additional
              consideration, if any, payable upon the issue of such Convertible
              Securities and upon the conversion or exchange thereof, by (y) the
              total maximum number of shares of Common Stock issuable

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              upon the exercise of such rights or options or upon the conversion
              or exchange of all such Convertible Securities issuable upon the
              exercise of such rights or options) shall be less than the Warrant
              Exercise Price in effect immediately prior to the time of the
              granting of such rights or options, then the total maximum number
              of shares of Common Stock issuable upon the exercise of such
              rights or options or upon conversion or exchange of the total
              maximum amount of such Convertible Securities issuable upon the
              exercise of such rights or options shall (as of the date of
              granting of such rights or options) be deemed to have been issued
              for such price per share.  Except as provided in Section 3(h)
              below, no further adjustments of the Warrant Exercise Price shall
              be made upon the actual issue of such Common Stock or of such
              Convertible Securities upon exercise of such rights or options or
              upon the actual issue of such Common Stock upon conversion or
              exchange of such Convertible Securities.

                     (ii)   In case the Company shall issue or sell (whether
              directly or by assumption in a merger or otherwise) any
              Convertible Securities, whether or not the rights to exchange or
              convert thereunder are immediately exercisable, and the price per
              share for which Common Stock is issuable upon such conversion or
              exchange (determined by dividing (x) the total amount received or
              receivable by the Company as consideration for the issue or sale
              of such Convertible Securities, plus the minimum aggregate amount
              of additional consideration, if any, payable to the Company upon
              the conversion or exchange thereof, by (y) the total maximum
              number of shares of Common Stock issuable upon the conversion or
              exchange of all such Convertible Securities) shall be less than
              the Warrant Exercise Price in effect immediately prior to the time
              of such issue or sale, then the total maximum number of shares of
              Common Stock issuable upon conversion or exchange of all such
              Convertible Securities shall (as of the date of the issue or sale
              of such Convertible Securities) be deemed to be outstanding and to
              have been issued for such price per share, provided that (a)
              except as provided in Section 3(h) below, no further adjustments
              of the Warrant Exercise Price shall be made upon the actual issue
              of such Common Stock upon conversion or exchange of such
              Convertible Securities, and (b) if any such issue or sale of such
              Convertible Securities is made upon exercise of any rights to
              subscribe for or to purchase or any option to purchase any such
              Convertible Securities for which adjustments of the Warrant
              Exercise Price have been or are to be made pursuant to other
              provisions of this Section 3, no further adjustment of the Warrant
              Exercise Price shall be made by reason of such issue or sale.

                     (iii)  In case any shares of Common Stock or Convertible
              Securities or any rights or options to purchase any such Common
              Stock or Convertible Securities shall be issued or sold for cash,
              the consideration received therefor shall be deemed to be the
              amount received by the Company therefor, without deducting
              therefrom any expenses incurred or any underwriting commissions or
              concessions paid or allowed by the Company in connection
              therewith.  In case any shares of Common Stock or Convertible
              Securities or any rights or options to purchase any such Common
              Stock or Convertible Securities shall be issued or sold for a
              consideration other

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              than cash, the amount of the consideration other than cash
              received by the Company shall be deemed to be the fair value of
              such consideration as determined by the Board of Directors of the
              Company, without deducting therefrom any expenses incurred or any
              underwriting commissions or concessions paid or allowed by the
              Company in connection therewith.  In case any shares of Common
              Stock or Convertible Securities or any rights or options to
              purchase such Common Stock or Convertible Securities shall be
              issued in connection with any merger or consolidation in which the
              Company is the surviving corporation, the amount of consideration
              therefor shall be deemed to be the fair value as determined by the
              Board of Directors of the Company of such portion of the assets
              and business of the non-surviving corporation or corporations as
              such Board shall determine to be attributable to such Common
              Stock, Convertible Securities, rights or options, as the case may
              be.  In the event of any consolidation or merger of the Company in
              which the Company is not the surviving corporation or in the event
              of any sale of all or substantially all of the assets of the
              Company for stock or other securities of any other corporation,
              the Company shall be deemed to have issued a number of shares of
              its Common Stock for stock or securities of the other corporation
              computed on the basis of the actual exchange ratio on which the
              transaction was predicated and for a consideration equal to the
              fair market value on the date of such transaction of such stock or
              securities of the other corporation, and if any such calculation
              results in adjustment of the Warrant Exercise Price, the
              determination of the number of shares of Common Stock issuable
              upon conversion immediately prior to such merger, conversion or
              sale, for purposes of Section 3(i) below, shall be made after
              giving effect to such adjustment of the Warrant Exercise Price.

                     (iv)   In case the Company shall take a record of the
              holders of its Common Stock for the purpose of entitling them (a)
              to receive a dividend or other distribution payable in Common
              Stock or in Convertible Securities, or in any rights or options to
              purchase any Common Stock or Convertible Securities, or (b) to
              subscribe for or purchase Common Stock or Convertible Securities,
              then the date of such record shall be deemed to be the date of the
              issue or sale of the shares of Common Stock deemed to have been
              issued or sold upon the declaration of such dividend or the making
              of such other distribution or the date of the granting of such
              rights of subscription or purchase, as the case may be.

              (f)    In case the Company shall (i) declare a dividend upon the
       Common Stock payable in Common Stock (other than a dividend declared to
       effect a subdivision of the outstanding shares of Common Stock, as
       described in Section 3(g) below) or Convertible Securities, or in any
       rights or options to purchase any Common Stock or Convertible Securities,
       or (ii) declare any other dividend or make any other distribution upon
       the Common Stock payable otherwise than out of earnings or earned
       surplus, then thereafter the Holder upon the conversion hereof will be
       entitled to receive the number of shares of Common Stock issuable upon
       exercise of this Warrant, and, in addition and without payment therefor,
       each dividend described in clause (i) above and each dividend or
       distribution described in clause (ii) above which such holder would have
       received by way of dividends or distributions if continuously since the
       Holder became the record holder of this Warrant the Holder (x) had been
       the record holder of the number of shares of

                                          5

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       Common Stock then received, and (y) had retained all dividends or
       distributions in stock or securities (including Common Stock or
       Convertible Securities, or in any rights or options to purchase any
       Common Stock or Convertible Securities) payable in respect of such Common
       Stock or in respect of any stock or securities paid as dividends or
       distributions and originating directly or indirectly from such Common
       Stock.  For the purposes of the foregoing a dividend or distribution
       other than in cash shall be considered payable out of earnings or earned
       surplus only to the extent that such earnings or surplus are charged an
       amount equal to the fair value of such dividend or distribution as
       determined by the Board of Directors of the Company.

              (g)    In case the Company shall at any time subdivide its
       outstanding shares of Common Stock into a greater number of shares, the
       Warrant Exercise Price in effect immediately prior to such subdivision
       shall be proportionately reduced, and conversely, in case the outstanding
       shares of Common Stock of the Company shall be combined into a smaller
       number of shares, the Warrant Exercise Price in effect immediately prior
       to such combination shall be proportionately increased.

              (h)    If (i) the purchase price provided for in any right or
       option referred to in clause (i) of Section 3(e), or (ii) the additional
       consideration, if any, payable upon the conversion or exchange of
       Convertible Securities referred to in clause (i) or clause (ii) of
       Section 3(e), or (iii) the rate at which any Convertible Securities
       referred to in clause (i) or clause (ii) of Section 3(e) are convertible
       into or exchangeable for Common Stock, shall change at any time (other
       than under or by reason of provisions designed to protect against
       dilution), the Warrant Exercise Price then in effect hereunder shall
       forthwith be increased or decreased to such Warrant Exercise Price as
       would have obtained had the adjustments made upon the issuance of such
       rights, options or Convertible Securities been made upon the basis of (a)
       the issuance of the number of shares of Common Stock theretofore actually
       delivered upon the exercise of such options or rights or upon the
       conversion or exchange of such Convertible Securities, and the total
       consideration received therefor, and (b) the issuance at the time of such
       change of any such options, rights, or Convertible Securities then still
       outstanding for the consideration, if any, received by the Company
       therefor and to be received on the basis of such changed price; and on
       the expiration of any such option or right or the termination of any such
       right to convert or exchange such Convertible Securities, the Warrant
       Exercise Price then in effect hereunder shall forthwith be increased to
       such Warrant Exercise Price as would have obtained had the adjustments
       made upon the issuance of such rights or options or Convertible
       Securities been made upon the basis of the issuance of the shares of
       Common Stock theretofore actually delivered (and the total consideration
       received therefor) upon the exercise of such rights or options or upon
       the conversion or exchange of such Convertible Securities.  If the
       purchase price provided for in any right or option referred to in clause
       (i) of Section 3(e), or therate at which any Convertible Securities
       referred to in clause (i) or clause (ii) of Section 3(e) are convertible
       into or exchangeable for Common Stock, shall decrease at any time under
       or by reason of provisions with respect thereto designed to protect
       against dilution, then in case of the delivery of Common Stock upon the
       exercise of any such right or option or upon conversion or exchange of
       any such Convertible Security, the Warrant Exercise Price then in effect
       hereunder shall forthwith be decreased to such Warrant Exercise Price as
       would have obtained had the adjustments

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<PAGE>

       made upon the issuance of such right, option or Convertible Security been
       made upon the basis of the issuance of (and the total consideration
       received for) the shares of Common Stock delivered as aforesaid.

              (i)    If any capital reorganization or reclassification of the
       capital stock of the Company, or consolidation or merger of the Company
       with another corporation, or the sale of all or substantially all of its
       assets to another corporation shall be effected in such a way that
       holders of Common Stock shall be entitled to receive stock, securities or
       assets with respect to or in exchange for Common Stock, then, as a
       condition of such reorganization, reclassification, consolidation, merger
       or sale, lawful and adequate provision shall be made whereby the Holder
       of this Warrant shall thereafter have the right to receive upon the basis
       and upon the terms and conditions specified herein and in lieu of the
       shares of the Common Stock of the Company immediately theretofore
       receivable upon the exercise of this Warrant, such shares of stock,
       securities or assets as may be issued or payable with respect to or in
       exchange for a number of outstanding shares of such Common Stock equal to
       the number of shares of such stock immediately theretofore receivable
       upon the exercise of this Warrant had such reorganization,
       reclassification, consolidation, merger or sale not taken place, plus all
       dividends unpaid and accumulated or accrued thereon to the date of such
       reorganization, reclassification, consolidation, merger or sale, and in
       any such case appropriate provision shall be made with respect to the
       rights and interests of the Holder of this Warrant to the end that the
       provisions hereof (including without limitation provisions for
       adjustments of the Warrant Exercise Price and of the number of shares
       receivable upon the exercise of the this Warrant) shall thereafter be
       applicable, as nearly as may be in relation to any shares of stock,
       securities or assets thereafter receivable upon the exercise of this
       Warrant.  The Company shall not effect any such consolidation, merger or
       sale, unless prior to the consummation thereof the successor corporation
       (if other than the Company) resulting from such consolidation or merger
       or the corporation purcasing such assets shall assume by written
       instrument executed and mailed to the Holder of this Warrant, at the last
       addresses of such holders appearing on the books of the Company, the
       obligation to deliver to the Holder such shares of stock, securities or
       assets as, in accordance with the foregoing provisions, the Holder may be
       entitled to receive.

              (j)    Upon any adjustment of the Warrant Exercise Price, then and
       in each case the Company shall give written notice thereof, by
       first-class mail, postage prepaid, addressed to the Holder of this
       Warrant, which shall state the Warrant Exercise Price resulting from such
       adjustment and the increase or decrease, if any, in the number of shares
       receivable at such price upon the exercise of this Warrant, setting forth
       in reasonable detail the method of calculation and the facts upon which
       such calculation is based, and which notice shall be certified by a
       nationally recognized firm of independent auditors (which may be the
       Company's independent auditors).

              (k)    In case at any time:

                     (i)    the Company shall declare any cash dividend on its
              Common Stock;

                                          7

<PAGE>

                     (ii)   the Company shall pay any dividend payable in stock
              upon its Common Stock or make any distribution (other than regular
              cash dividends) to the holders of its Common Stock;

                     (iii)  the Company shall offer for subscription pro rata to
              the holders of its Common Stock any additional shares of stock of
              any class or other rights;

                     (iv)   there shall be any capital reorganization, or
              reclassification of the capital stock of the Company, or
              consolidation or merger of the Company with, or sales of all or
              substantially all of its assets to, another corporation; or

                     (v)    there shall be a voluntary or involuntary
              dissolution, liquidation or winding up of the Company;

       then, in any one or more of said cases, the Company shall give written
       notice, by first-class mail, postage prepaid, addressed to the Holder at
       the addresses of such holders as shown on the books of the Company, of
       the date on which (a) the books of the Company shall close or a record
       shall be taken for such dividend, distribution or subscription rights, or
       (b) such reorganization, reclassification, consolidation, merger, sale,
       dissolution, liquidation or winding up shall take place, as the case may
       be.  Such notice shall also specify the date as of which the holders of
       Common Stock of record shall participate in such dividend, distribution
       or subscription rights, or shall be entitled to exchange their Common
       Stock for securities or other property deliverable upon such
       reorganization, reclassification, consolidation, merger, sale,
       dissolution, liquidation, or winding up, as the case may be.  Such
       written notice shall be given at least twenty (20) days prior to the
       action in question and not less than twenty (20) days prior to the record
       date or the date on which the Company's transfer books are closed in
       respect thereto.

              (l)    If any event occurs as to which in the opinion of the Board
       of Directors of the Company the other provisions of this Section 3 are
       not strictly applicable or if strictly applicable would not fairly
       protect the rights of the Holder in accordance with the essential intent
       and principles of such provisions, then the Board of Directors shall make
       an adjustment in the application of such provisions, in accordance with
       such essential intent and principles, so as to protect such rights as
       aforesaid.

              (m)    As used in this Section 3 the term "Common Stock" shall
       mean and include the Company's presently authorized Common Stock and
       shall also include any capital stock of any class of the Company
       hereafter authorized which shall not be limited to a fixed sum or
       percentage in respect of the rights of the holders thereof to participate
       in dividends or in the distribution of assets upon the voluntary or
       involuntary liquidation, dissolution or winding up of the Company;
       provided that the shares receivable pursuant to exercise of this Warrant
       shall include shares designated as Common Stock of the Company as of the
       date of issuance of this Warrant, or, in case of any reclassification of
       the outstanding shares thereof, the stock, securities or assets provided
       for in Section 3(i) above.

                                          8

<PAGE>

              (n)    No fractional shares of Common Stock shall be issued upon
       conversion pursuant to this Section 3, but, instead of any fraction of a
       share which would otherwise be issuable, the Company shall pay a cash
       adjustment in respect of such fraction in an amount equal to the same
       fraction of the Fair Market Value, as defined in Section 1, of one share
       of Common Stock as of the close of business on the day of conversion.

       4.     This Warrant shall not entitle the Holder to any voting rights or
other rights as a shareholder of the Company.

       5.     The Holder, by acceptance hereof, represents and warrants that (a)
it is acquiring this Warrant for its own account for investment purposes only
and not with a view to its resale or distribution and (b) it has no present
intention to resell or otherwise dispose of all or any part of this Warrant.
Other than pursuant to registration under federal and state securities laws or
an exemption from such registration, the availability of which the Company shall
determine in its sole discretion, (y) the Company will not accept the exercise
of this Warrant or issue certificates for shares of Warrant Stock and (z)
neither this Warrant nor any shares of Warrant Stock may be sold, pledged,
assigned or otherwise disposed of (whether voluntarily or involuntarily).  The
Company may condition such issuance or sale, pledge, assignment or other
disposition on the receipt from the party to whom this Warrant is to be so
transferred or to whom Warrant Stock is to be issued or so transferred of any
representations and agreements requested by the Company in order to permit such
issuance or transfer to be made pursuant to exemptions from registration under
federal and applicable state securities laws.  Each certificate representing the
Warrant (or any part thereof) and any shares of Warrant Stock shall be stamped
with appropriate legends setting forth these restrictions on transferability.
The Holder, by acceptance hereof, agrees to give written notice to the Company
before exercising or transferring this Warrant or transferring any shares of
Warrant Stock of the Holder's intention to do so, describing briefly the manner
of any proposed exercise or transfer.  Within thirty (30) days after receiving
such written notice, the Company shall notify the Holder as to whether such
exercise or transfer may be effected.

       6.     This Warrant shall be transferable only on the books of the
Company by the Holder in person, or by duly authorized attorney, on surrender of
the Warrant, properly assigned.

       7.     Neither this Warrant nor any term hereof may be changed, waived,
discharged or terminated orally but only by an instrument in writing signed by
the party against which enforcement of the change, waiver, discharge or
termination is sought.

       IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by
its duly authorized officer and to be dated as of the date set forth above.

                                          LSC, INCORPORATED

                                          By
                                            --------------------------------
                                          Its
                                             -------------------------------

THE SECURITIES EVIDENCED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933 OR APPLICABLE STATE SECURITIES LAWS.  THESE

                                          9

<PAGE>

SECURITIES HAVE BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED FOR SALE,
SOLD, PLEDGED, ASSIGNED OR OTHERWISE DISPOSED OF, AND NO TRANSFER OF THE
SECURITIES WILL BE MADE BY THE COMPANY OR ITS TRANSFER AGENT, IN THE ABSENCE OF
SUCH REGISTRATION OR AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY THAT SUCH
REGISTRATION IS NOT REQUIRED.

                                          10

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