Rockwell 12R Handheld Electronic Calculator

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This handheld electronic calculator has a dark brown plastic case, a cream-colored keyboard, and sixteen rounded rectangular plastic keys. In addition to ten digit keys and a decimal point key, it has a clear entry/clear key, and four arithmetic function keys. Pushing the divide and then the multiply key allows one to take square roots.
Behind the keyboard is an eight-digit LED display. A mark behind the keyboard reads: Rockwell. A mark along the front edge reads: SQUARE ROOT 12R. The on/off switch is on the left side and the jack for a power adapter along the back edge.
The back has a battery compartment at the top for a nine volt battery. A sticker below this gives operating examples. It also reads: Microelectronic Product Division (/) Rockwell International (/) Anaheim CA 92803 (Calculator Model 12R (/) Assembled in Mexico (/) U.S. and Foreign Parts. Further text reads: Ser. (/) No. 144332.
Compare 1986.0988.239 (the Rockwell 10R).
[Advertisement], New York Times, June 29, 1975, p. 2. Rockwell 12R a giveaway with purchase of a printing Rockwell 82R calculator for $170.
[Advertisement], Statesville (N.C.) Record and Landmark, May 12, 1975, p. 3. Rockwell 12R on sale for $29.95.
Currently not on view
date made
Rockwell International
place made
Physical Description
plastic (case; keyboard; display cover material)
metal (circuitry material)
paper (sticker material)
overall: 7/8 in x 3 in x 5 3/8 in; 2.2225 cm x 7.62 cm x 13.6525 cm
ID Number
catalog number
accession number
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History


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