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                                                                   EXHIBIT 10.21

                            SECURED PROMISSORY NOTE

$1,048,826.34                                           Pittsburgh, Pennsylvania

                                                   Dated as of December 22, 1999

        FOR VALUE RECEIVED, the undersigned, JOSEPH WHANG ("Borrower"), promises
to pay to the order of PROGRAPH SYSTEMS, INC., a Pennsylvania corporation (the
"Company"), the principal sum of One Million, Forty Eight Thousand, Eight
Hundred Twenty-six Dollars and thirty-four Cents ($1,048,826.34) with interest
from the date hereof on the unpaid balance as specified herein. The entire
unpaid balance of principal and interest shall be due and payable, on the
earlier to occur of (1) Five (5) years from date of this note, (2) breach of the
Pledge Agreement dated the date hereof between the Company and Borrower, or (3)
a date specified in a written notice provided by Borrower to the Company setting
forth a date for repayment at least 5 business days after the date of such
notice.

        The interest rate on this note shall be an annual rate of interest equal
to six percent (6%), compounded semiannually. Interest shall be computed on the
basis of a year of 365 days and the actual number of days elapsed, except that
interest shall not be computed on the day of full repayment of this note.
Interest not paid when due shall earn interest at the rate specified above.

        If payment is not made when due, and if action is instituted on this
note, the undersigned agrees to pay the Company reasonable attorneys' fees and
costs of suit, as fixed by court in connection with the collection of the
outstanding amounts due under this note.

        The undersigned shall have the right to prepay all or any part of the
unpaid principal amount of this note, without premium, at any time prior to the
maturity hereof.

                                      -1-

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        This note is originally secured by a pledge of shares of Common Stock of
the Company pursuant to a Pledge Agreement of even date herewith, which is on
file with the Secretary of the Company.

        If one or more of the provisions hereof shall be declared or held to be
invalid, illegal, or unenforceable in any respect in any jurisdiction, the
validity, legality and enforceability of the remaining provisions hereof shall
not in any way be affected or impaired thereby and any such declaration or
holding shall not invalidate or render unenforceable such provision in any other
jurisdiction.

        In case the note shall become mutilated or defaced, or be destroyed,
lost or stolen, the Borrower shall execute and deliver a new note of like
principal amount in exchange and substitution for the mutilated or defaced note,
or in lieu of and in substitution for the destroyed, lost or stolen note. In the
case of a mutilated or defaced note, the Company shall surrender such note to
the Borrower. In the case of any destroyed, lost or stolen note, the Company
shall furnish to the Borrower evidence to its satisfaction of the destruction,
loss or theft of such note.

        Notwithstanding anything to the contrary herein, in the event the value
of the Shares secured by the Pledge Agreement is insufficient to pay the full
amount due and owing hereunder, the Company may seek reimbursement from Borrower
for any deficiency, plus all interest accrued from the date of this note to the
due date as determined pursuant to the first paragraph of this note.

        This note shall be governed by and construed in accordance with the laws
of the Commonwealth of Pennsylvania, without regard to Pennsylvania choice of
law provisions.

                                      -2-

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        IN WITNESS WHEREOF, the undersigned has signed, dated and delivered this
note as of the date and year first above written.

                                             /s/ Joseph Whang
                                            -------------------------------
                                            Joseph Whang

                                      -3-<PAGE>
                                                                   Exhibit 10.22

                                PLEDGE AGREEMENT

        THIS PLEDGE AGREEMENT, entered into as of December 22, 1999, between
PROGRAPH SYSTEMS, INC., a Pennsylvania corporation (the "Company"), and JOSEPH
WHANG (the "Purchaser").

                                   WITNESSETH:

        WHEREAS, the Purchaser has purchased from the Company 1,018,278 shares
of the Company's Common Stock (the "Shares"); and

        WHEREAS, the Company has loaned to the Purchaser the sum of
$1,048,826.34 which the Purchaser has used to pay the purchase price of the
Shares; and

        WHEREAS, the Purchaser has executed and delivered to the Company a
secured promissory note evidencing such loan (the "Note") and has agreed to
pledge the Shares (the "Pledged Shares") to the Company as security for the
payment of the Note:

        NOW, THEREFORE, it is agreed as follows:

        1. The Purchaser hereby delivers to the Company one or more certificates
representing the Shares, together with two Assignments Separate From Certificate
signed by the Purchaser. The Purchaser hereby pledges and grants a security
interest in the Pledged Shares, including any shares into which the Pledged
Shares may be converted and all proceeds of the Pledged Shares, as security for
the timely payment of all of the Purchaser's obligations under the Note and for
the Purchaser's performance of all of its obligations under this Agreement. In
the event of a default in payment of the Note, the Purchaser hereby appoints the
Company as his true and lawful attorney to take such action as may be necessary
or appropriate to cause the Pledged Shares to be transferred into the name of
the Company or any assignee of the Company and to take any other action on
behalf of the Purchaser permitted hereunder or under applicable law.

        2. The Purchaser may indicate a Bank or Trust Company to hold the
Pledged Shares as security for the timely payment of all of the Purchaser's
obligations under the Note and for the Purchaser's performance of all of its
obligations under this Agreement, as provided herein. At no time shall the
Company dispose of or encumber the Pledged Shares, except as otherwise provided
in this Agreement or the Stock Purchase Agreement dated as of the date hereof
between the Company and the Purchaser (the "Stock Purchase Agreement").

        3. At all times while the Company is holding the Pledgee Shares as
security under this Agreement, the Company shall:

                      Collect any dividends that may be declared on the Pledged
        Shares and credit such dividends against any accrued interest or unpaid
        principal under the Note, as part payment;

                                      -4-

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                      Collect and hold any shares that may be issued upon
        conversion of the Pledged Shares; and

                      Collect and hold any other securities or other property
        that may be distributed with respect to the Pledged Shares.

Such shares and other securities or property shall be subject to the security
interest granted in Section 1 of this Agreement and shall be held by the Company
under this Agreement.

        4. While the Pledgee holds the Pledged Shares as security under this
Agreement, the Purchaser shall have the right to vote the Pledged Shares at all
meetings of the Company's stockholders; provided that the Purchaser is not in
default in the performance of any term of this Agreement, the Stock Purchase
Agreement or Employment Agreement or in any payment due under the Note. In the
event of such a default, the Company shall have the right to the extent
permitted by law to vote and to give consents, ratifications and waivers and
take any other action with respect to the Pledged Shares with the same force and
effect as if the Company were the absolute and sole owner of the Pledged Shares.

        5. Upon payment in full of the outstanding principal balance of the Note
and all interest and other charges due under the Note, subject to the terms of
the Stock Purchase Agreement, the Company shall authorize release from pledge
and redeliver to the Purchaser the certificate(s) representing the Pledged
Shares and the Assignment Separate From Certificate forms.

        6. In the event that the Purchaser fails to perform any term of this
Agreement or fails to make any payment when due under the Note and such failure
continues for 10 days after notice thereof (an "Event of Default"), the Company
shall have all of the rights and remedies of a creditor and secured party at law
and in equity, including (without limitation) the rights and remedies provided
under the Uniform Commercial Code.

               Without limiting the foregoing, after an Event of Default, the
Company may, after giving ten (10) days' prior written notice to the Purchaser
by certified mail at his residence or business address, sell any or all of the
Pledged Shares in such manner and for such price as the Company may determine,
including (without limitation) through a public or private sale or at any
broker's board or on any securities exchange, for cash, upon credit or for
future delivery. The Company is authorized at any such sale, if it deems it
advisable to do so, to restrict the prospective bidders or purchasers of any of
the Pledged Shares to persons who will represent and agree that they are
purchasing for their own account for investment, and not with a view to the
distribution or sale of any of the Pledged Shares, to restrict the prospective
bidders or purchasers and the use any purchaser may make of the Pledged Shares
and impose any other restriction or condition that the Company deems necessary
or advisable under the federal and state securities laws.

                                      -5-

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               Upon any such sale the Company shall have the right to deliver,
assign and transfer to the purchaser thereof the Pledged Shares so sold. Each
purchaser at any such sale shall hold the Pledged Shares so sold absolute, free
from any claim or right of any kind. In case of any sale of any or all of the
Pledged Shares on credit or for future delivery, the Pledged Shares so sold may
be retained by the Company until the selling price is paid by the purchaser
thereof, but the Company shall not incur any liability in case of the failure of
such purchaser to take up and pay for the Shares so sold and, in case of any
such failure, such Shares may again be sold under the terms of this section.

               The Purchaser hereby agrees that any disposition of any or all of
the Pledged Shares by way of a private placement or other method which in the
opinion of the Company is required or advisable under Federal and state
securities laws is commercially reasonable. At any public sale, the Company may
(if it is the highest bidder) purchase all or any part of the Pledged Shares at
such price as the Company deems proper. Out of the proceeds of any sale, the
Company may retain an amount sufficient to pay all amounts then due under the
Note, together with the expenses of the sale and reasonable attorneys' fees. The
Company shall pay the balance of such proceeds, if any, to the Purchaser. The
Purchaser shall be liable for any deficiency that remains after the Company has
exercised its rights under this Agreement.

        7. This Agreement shall be governed by and construed in accordance with
the laws of the Commonwealth of Pennsylvania, without regard to Pennsylvania
choice of law provisions.

        8. This Agreement shall inure to the benefit of, and be binding upon,
the Company and its successors and assigns and be binding upon the purchaser and
the Purchaser's legal representative, heirs, legatees, distributees, assigns and
transferees by operation of law.

        9. This Agreement contains the entire pledge agreement between the
Company and the Purchaser.

        10. The Purchaser will execute any additional agreements, assignments or
documents or take any other actions reasonably required by the Company to
preserve and perfect the security interest in the Pledged Shares granted to the
Company herein and otherwise to effectuate this Agreement.

                                      -6-

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        IN WITNESS WHEREOF, the Company has caused this Agreement to be executed
on its behalf by its duly authorized officer, and the Purchaser has personally
executed this Agreement.

                                            PROGRAPH SYSTEMS, INC.

                                            By /s/ Marc Olin
                                              -------------------------------
                                                 Marc Olin, President

                                            JOSEPH WHANG

                                               /s/ Joseph Whang
                                            ---------------------------------

                                      -7-

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