Rockwell-ANITA Calculators
Rockwell-ANITA 1216

Rockwell-Anita 1216

Rockwell ANITA 1216.

Power supply - AC.

Display is 12 digits, Burroughs 'Panaplex' amber gas discharge.

4-function, %, memory.

Integrated circuits - Electronic Arrays EA7022 and EA7023, here date coded 1973.

256 mm x 193 mm x 70 mm (10.0" x 7.6" x 2.75").

"Made in U.S.A"
"Rockwell International. Sumlock Anita Ltd. Uxbridge England"
Circuit board has the name of the Cherry company on it, see below.

Introduced in late 1973[1].


This Rockwell-Anita calculator is unusual for two reasons:

This can be explained by the following report in the journal 'Electronics' in August 1973[2]:
"Cherry is private-labelling calculators. . .
Cherry Electrical Products Corp., Waukegan, Ill., has eased its way into calculator manufacturing and is now producing private-label units for Unicom, SCM, Summit, and Olympia.  The company, a major switch maker, moved into keyboard manufacture before making the jump into calculator assembly, a $6 million business which is expected to raise sales by 40% next year to over $24 million."

Unicom was the trade name of the calculators manufactured by the semiconductor company American Micro-systems Inc.  Like Sumlock Anita, Unicom was bought by Rockwell in 1972.  Very similar-looking calculators under the Unicom, Olympia, SCM (Smith, Corona, Marchant), and Summit labels are known.

See also the Rockwell-ANITA 102 hand-held calculator and its similarity to the Unicom 102.

Cover removed

The cover has been removed to reveal the Burroughs 'Panaplex' gas-discharge display and, at the rear, the two integrated circuits made by Electronic Arrays.

EA chips

The rear of the circuit board with the Electronic Arrays integrated circuit: EA7022 on the right and EA7023 on the left.

EA chips

Close up of the Electronic Arrays integrated circuits.

The journal 'Electronic Design' reported in January 1973[3]:
"Calculator system on two ICs
    Two MOS circuits contain all the calculating logic, the clock, and a good portion of the interface circuitry of a 12-digit, four-function memory calculator.  Called the EA7022 (in a 28-lead DIP) and the EA7023 (in a 40-lead DIP), the two packages make up the EA S129 set.  They include an arithmetic/algebraic processor with 12-digit entry and display capacity, an accumulator memory, the keyboard scanning and display control logic, an internal clock generator, and power-on clearing circuitry."


The label on the rear.


The new Anita 1216 is a versatile, low-cost calculator from Sumlock.  The unit includes memory; automatic chaining; automatic decimal system; constant, percent and exchange keys.  The display is a big, easy-to-read 12-column Panaplex system.
    Individual problems can be worked and accumulated in the independent memory register, while the 12-column capacity coupled with advanced float in/fixed out decimal system and underflow ensure that Anita 1216 can tackle everyday calculations with ease.  Mixed calculations (e.g. 2 x 3 + 4) are carried out in a single continuous flow operation.
    The percent key permits entering percentage as a whole number while giving decimally correct answers.  The exchange key permits recall of last entry to display as well as avoiding the need for manual re-entry when exchanging divisors and dividends.



  1. "eti EQUIPMENT NEWS", Electronics Today International, December 1973, p78.
  2. "News Briefs", Electronics, August 16, 1973, p44.
  3. "Calculator system on two ICs", Electronic Design, January 1973, p106.

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Text & photographs copyright © 2002 - 2023 Nigel Tout, except where noted otherwise.