Document:

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                                                               Exhibit 10.14

                                 PROMISSORY NOTE

$50,000                                                   Boston, Massachusetts
                                                          July 22, 1988

      FOR VALUE RECEIVED Multitrak Software Development Corp. (herein the
"Company"), a corporation organized and existing under the laws of the State of
Delaware with offices at 108 Lincoln Street, 3rd Floor, Boston, Massachusetts
02111-2502, hereby promises to pay to the order of Michael B. Shattow the
principal sum of FIFTY THOUSAND DOLLARS ($50,000) on July 30, 1991 together with
interest at a rate per annum equal to the Prime Rate established from time to
time by Wainright Bank and Trust Company plus three and one-half percent
(3 1/2%) (computed on the basis of a 360-day year of twelve 30-day months) on
the close of business on the last day of each month commencing on July 31, 1988,
and on any overdue principal and interest until paid in full.

      Principal, interest and all other amounts due under this Note shall be
payable in immediately available funds at the Company's office, or at such other
place as the holder of this Note may from time to time designate in writing to
the Company.

      This Note is issued pursuant to certain obligations of Michael B. Shattow
under a Securities Purchase Agreement (hereinafter the "Agreement") dated April
20, 1988 by and among Multitrak Software Development Corp., LRF Investments,
Inc. and Michael B. Shattow.

      The Company shall have the option to prepay all or any part of the
principal amount of this Note from time to time together with interest accrued
on the amount prepaid to the prepayment date.

<PAGE>

      Payment of the principal of, and interest on, this Note is expressly
subordinated to the prior payment of Senior Debt as provided in the Agreement,
and by acceptance of this Note the holder hereof agrees to be bound by such
provisions of the Agreement.

      Reference is herewith made to the Agreement for the definition of certain
Notes and Revolving Credit Note. The indebtedness of the Company to Michael B.
Shattow under this Note shall be subordinated in right of payment of interest
and liquidation to the Notes and the Revolving Credit Note as defined in the
said Agreement.

      If an Event of Default as defined in the Agreement should occur and be
continuing, the principal amount and accrued interest of this Note may be
declared immediately due and payable in the manner and to the extent provided
for in the Agreement.

      The Company hereby waives demand, presentment for payment, notice of
dishonor, protest, notice of protest and diligence, and agrees that the holder
hereof may extend the time for payment or accept partial payment without
discharging or releasing the Company.

      IN WITNESS WHEREOF this Note has been executed and delivered as a sealed
instrument at the place and on the date set forth above by the duly authorized
representatives of the Company.

                                            MULTITRAK SOFTWARE DEVELOPMENT CORP.

                                            By: /s/ Michael B. Shattow
                                                -----------------------------
                                                Michael B. Shattow, President<PAGE>
                                                                 Exhibit 10.15

                                                                          COPY

      THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
      MAY NOT BE SOLD, TRANSFERRED, HYPOTHECATED OR OTHERWISE ASSIGNED EXCEPT
      (i) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT OR (ii)
      FOLLOWING RECEIPT BY THE ISSUER OF AN OPINION FROM ITS COUNSEL THAT NO
      REGISTRATION STATEMENT IS NECESSARY IN CONNECTION WITH SUCH TRANSACTION.
      THE TRANSFER OF THIS SECURITY IS SUBJECT TO THE CONDITIONS SPECIFIED IN
      THE SECURITIES PURCHASE AGREEMENT, DATED APRIL 20, 1988, TO WHICH THE
      ISSUER AND THE ORIGINAL HOLDER OF THIS SECURITY ARE PARTIES. A COPY OF
      SUCH CONDITIONS WILL BE FURNISHED BY THE ISSUER TO THE HOLDER HEREOF UPON
      WRITTEN REQUEST AND WITHOUT CHARGE.

                      MULTITRAK SOFTWARE DEVELOPMENT CORP.
                              Revolving Credit Note

$100,000.00                                               Boston, Massachusetts
                                                          April 20, 1988

      FOR VALUE RECEIVED Multitrak Software Development Corp. (herein the
"Company"), a corporation organized and existing under the laws of the State of
Delaware with offices at 250 Pond Street, Jamaica Plain, MA 02130, hereby
promises to pay to the order of LRF Investments, Inc. (the "Lender"), the
principal sum of ONE HUNDRED THOUSAND DOLLARS ($100,000.00) (or, if less, the
aggregate unpaid principal amount of all Advances made by the Lender to the
Company pursuant to the Securities Purchase Agreement (the "Agreement") dated
April 20, 1988), together with interest on the unpaid principal from time to
time outstanding at a fluctuating rate per annum equal to the Prime Rate
established from time to time by the Wainright Bank and Trust Company plus three
and one-half percent (3 1/2%) (computed on the basis of a 360-day year of
twelve 30-day months),
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payable in arrears at the close of business on the last day of each month
commencing on May 31, 1988, and on any overdue principal and interest until paid
in full. The entire balance of outstanding principal and accrued unpaid interest
shall be paid in full on or prior to May 31, 1991.

      Principal, interest and all other amounts due under this Revolving Credit
Note shall be payable in immediately available funds at the office of the
Lender, 189 Wells Avenue, Newton, Massachusetts 02159, or at such other address
as the holder of this Revolving Credit Note may from time to time designate in
writing to the Company.

      This Revolving Credit Note represents indebtedness for one or more
Advances made by the Lender to the Company under the Agreement. Reference is
hereby made to the Agreement for a complete description of the rights,
obligations, limitations and restrictions of the Company and the holders of the
Revolving Credit Note, and the terms and conditions of the Revolving Credit Note
noted hereafter are subject in every respect to the terms and conditions of the
Agreement.

      As provided in the Agreement, the Company shall have the option to prepay
all or any part of the principal amount of this Revolving Credit Note from time
to time together with interest accrued on the amount prepaid to the prepayment
date.

      Payment of the principal of, and interest on, this Revolving Credit Note
is expressly subordinated to the prior payment of the Senior Debt as provided in
the Agreement, and by

                                       2
<PAGE>

acceptance of this Revolving Credit Note, the holder hereof agrees to be bound
by such provisions of the Agreement.

      If an Event Of Default as defined in the Agreement should occur and be
continuing, the principal amount and accrued interest of this Revolving Credit
Note may be declared immediately due and payable in the manner and to the extent
provided in the Agreement.

      The Company hereby waives demand, presentment for payment, notice of
dishonor, protest, notice of protest and diligence, and agrees that the holder
hereof may extend the time for payment or accept partial payment without
discharging or releasing the Company.

      IN WITNESS WHEREOF, this Revolving Credit Note has been executed and
delivered as a sealed instrument at the place and on the date set forth above by
the duly authorized representative of the Company.

[Corporate Seal]                              MULTITRAK SOFTWARE DEVELOPMENT
                                                CORP.

                                               By /s/ Michael B. Shattow
                                                  -----------------------------
                                                  Michael B. Shattow, President

ATTEST:

/s/ Peter Myerson, Asst. Sec.
------------------------------
Peter Myerson Assistant
  Secretary

DP-2001/d<PAGE>
                                                                Exhibit 10.16

                                                                         COPY

            THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
      1933 AND MAY NOT BE SOLD, TRANSFERRED, HYPOTHECATED OR OTHERWISE ASSIGNED
      EXCEPT (i) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT
      OR (ii) FOLLOWING RECEIPT BY THE ISSUER OF AN OPINION FROM ITS COUNSEL
      THAT NO REGISTRATION STATEMENT IS NECESSARY IN CONNECTION WITH SUCH
      TRANSACTION. THE TRANSFER OF THIS SECURITY IS SUBJECT TO THE CONDITIONS
      SPECIFIED IN THE SECURITIES PURCHASE AGREEMENT, DATED APRIL 20, 1988, TO
      WHICH THE ISSUER AND THE ORIGINAL HOLDER OF THIS SECURITY ARE PARTIES. A
      COPY OF SUCH CONDITIONS WILL BE FURNISHED BY THE ISSUER TO THE HOLDER
      HEREOF UPON WRITTEN REQUEST AND WITHOUT CHARGE.

                      MULTITRAK SOFTWARE DEVELOPMENT CORP.
                                Subordinated Note

$240,000.00                                                Boston, Massachusetts
                                                           April 20, 1988

      FOR VALUE RECEIVED Multitrak Software Development Corp. (herein the
"Company"), a corporation organized and existing under the laws of the State of
Delaware with offices at 250 Pond Street, Jamaica Plain, MA 02130, hereby
promises to pay to the order of LRF Investments, Inc. the principal sum of TWO
HUNDRED AND FORTY THOUSAND DOLLARS ($240,000.00) on April 30, 1991 together with
interest at a rate per annum equal to the Prime Rate established from time to
time by Wainright Bank and Trust Company plus three and one-half percent
(3 1/2%) (computed on the basis of a 360-day year of twelve 30-day months) on
the unpaid balance of principal hereof, payable in arrears at the close of
business on the last day of each month commencing on May 31, 1988, and on any
overdue principal and interest until paid in full.
<PAGE>

      Principal, interest and all other amounts due under this Note shall be
payable in immediately available funds at the office of LRF Investments, Inc.,
189 Wells Avenue, Newton, MA 02159, or at such other place as the holder of this
Note may from time to time designate in writing to the Company.

      This Note is issued pursuant to and is entitled to the benefits of, a
Securities Purchase Agreement (herein the "Agreement") dated April 20, 1988 by
and among the Company, the original purchaser hereof and Michael B. Shattow.
Reference is hereby made to the Agreement for a complete description of the
rights, obligations, limitations and restrictions of the Company and the holders
of the Note, and the terms and conditions of the Note noted hereafter are
subject in every respect to the terms and conditions of the Agreement.

      As provided in the Agreement, the Company shall have the option to prepay
all or any part of the principal amount of this Note from time to time together
with interest accrued on the amount prepaid to the prepayment date.

      Payment of the principal of, and interest on, this Note is expressly
subordinated to the prior payment of Senior Debt as provided in the Agreement,
and by acceptance of this Note the holder hereof agrees to be bound by such
provisions of the Agreement.

      If an Event of Default as defined in the Agreement should occur and be
continuing, the principal amount and accrued interest of this Note may be
declared immediately due and

                                       2
<PAGE>

payable in the manner and to the extent provided for in the Agreement.

      The Company hereby waives demand, presentment for payment, notice of
dishonor, protest, notice of protest and diligence, and agrees that the holder
hereof may extend the time for payment or accept partial payment without
discharging or releasing the Company.

      IN WITNESS WHEREOF this Note has been executed and delivered as a sealed
instrument at the place and on the date set forth above by the duly authorized
representatives of the Company.

                                      MULTITRAK SOFTWARE DEVELOPMENT
                                        CORP.

[corporate seal]

                                      By /s/ Michael B. Shattow
                                         ------------------------
                                         Michael B. Shattow, President

ATTEST:

/s/ Peter Myerson, asst. sec.
------------------------------
Peter Myerson, Assistant
  Secretary

DP-1978/d

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