Exhibit 4.2


NORWEST-BANK MINNESOTA                          REVOLVING NOTE
NATIONAL ASSOCIATON

$5,000,000.00                                                   October 13, 1997

FOR VALUE RECEIVED, Research, Incorporated (the "Borrower") promises to pay to
the order of Norwest Bank Minnesota, National Association (the "Bank"), at its
principal office or such other address as the Bank or holder may designate from
time to time, the principal sum of Five Million and 00/100 Dollars
($5,000,000.00), or the amount shown on the Bank's records to be outstanding,
plus interest (calculated on the basis of actual days elapsed in a 360-day year)
accruing each day on the unpaid principal balance at the annual interest rate(s)
defined below. Absent manifest error, the Bank's records shall be conclusive
evidence of the principal and accrued interest owing hereunder.

INTEREST RATE.

BASE RATE OPTION. Unless the Borrower chooses the LIBOR Interest Rate Option as
defined below, the principal balance outstanding under this Revolving Note shall
bear interest at an annual rate equal to the Base Rate, floating (the "Base Rate
Option"). Base Rate means the rate of interest established by the Bank from time
to time as its "base" or "prime" rate of interest at its principal office in
Minneapolis, Minnesota.

LIBOR INTEREST RATE OPTION. Subject to the terms and conditions of the Agreement
the Borrower may elect that all or portions of the principal balance of this
Revolving Note bear interest at the LIBOR Interest Rate plus 2.3% (the "LIBOR
Interest Rate Option"). Specific reference is made to the Interest Rate Options
section of the Agreement for terms governing the designation of interest periods
and rate portions.

The LIBOR Interest Rate shall be computed in accordance with the following
formula.

         LIBOR Interest Rate = London Interbank Offered Rate
                               -----------------------------
                               1.00 - Reserve Requirement

         Where,

(i) "London Interbank Offered Rate" means the Bank's cost of funds as determined
by the Bank's Treasury Division, based upon the average rate at which U.S.
Dollar deposits with a term equal to the applicable LIBOR Interest Rate Period
and in an amount equal to the LIBOR Interest Rate Portion are available to the
Bank at the time or determination on the London Interbank Market.

(ii) "Reserve Requirement" means the Federal Reserve System requirement
(expressed as a percentage) applicable to the dollar deposits used in
calculating the LIBOR Interest Rate above.

REPAYMENT TERMS

INTEREST. Interest accruing under the Base Rate Option shall be payable on the
first day of each month, beginning November 1, 1997. Interest accruing under the
LIBOR Interest Rate Option shall be payable, as applicable, at the end of each
LIBOR Interest Rate Period or the first day of each month, whichever is earlier.

PRINCIPAL. Principal, and any unpaid interest, shall be due on the earlier of
DEMAND or January 31, 1999.

PREPAYMENT AND PREPAYMENT FEE. The Borrower may prepay principal accruing
interest under the Base Rate Option at any time without penalty. Each prepayment
of principal accruing interest at an optional interest rate, whether voluntary
or by reason of acceleration, shall be accompanied by a prepayment fee equal to
the amount of interest that would have accrued on the amount of principal
prepaid from the date of prepayment to its maturity or repricing date, at an
annual rate equal to 1) the optional rate then in effect under this Revolving
Note on the principal being prepaid, less 2) the yield (including interest and
discount) on a United States Treasury Security of comparable term that could be
purchased on the date of prepayment with a maturity on (or about) the maturity
or repricing date, discounted to its present value using the yield on the
replacement security as a discount factor, discounted monthly;

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provided, however, that no prepayment fee shall be due (and no credit or rebate
required) if the yield described in clause 2) exceeds the rate described in
clause 1).

ADDITIONAL TERMS AND CONDITIONS. This Revolving Note is issued pursuant to a
Credit Agreement of even date between the Bank and the Borrower (the
"Agreement"). The Agreement, and any amendments or substitutions, contains
additional terms and conditions, including default and acceleration provisions,
which are incorporated into this Revolving Note by reference. Capitalized terms
not expressly defined herein shall have the meanings given them in the
Agreement. The Borrower agrees to pay all costs of collection, including
reasonable attorneys' fees and legal expenses incurred by the Bank if this
Revolving Note is not paid as provided above. This Revolving Note shall be
governed by the substantive laws of the State of Minnesota.

WAIVER OF PRESENTMENT AND NOTICE OF DISHONOR. Borrower and any other person who
signs, guarantees or endorses this Revolving Note, to the extent allowed by law,
hereby waives presentment, demand for payment, notice of dishonor, protest, and
any notice relating to the acceleration of the maturity of this Revolving Note.


RESEARCH, INCORPORATED


BY:    /S/ CLAUDE C. JOHNSON
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ITS:   PRESIDENT AND CEO
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BY:    /S/ RICHARD L. GROSE
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ITS:   TREASURER
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