Summit SM20 Handheld Electronic Calculator

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This handheld electronic calculator has a black plastic case with twenty-one rectangular plastic keys. These include ten digit keys, a decimal point key, a constant key, two memory keys, four arithmetic function keys, a total key, a % key, and a clear key. The on/off switch is on the left of the top row of the keyboard. A tag along the front edge reads: Summit. Behind the keyboard is an eight-digit red LED display.
The back of the calculator has a silver-colored tag on the battery compartment that reads in part: Summit Sm20. It also reads: MODEL SM20 (/) SERIAL NO. 26861 (/) Tm SUMMIT INTERNATIONAL CORP. (/) SALT LAKE CITY, UTAH. The battery compartment would hold a nine-volt battery. Above the tag is a jack for a power supply.
Compare 1986.0988.019.
[Advertisement], Carol (Iowa) Daily Times Herald, September 10, 1975, p. 39. Summit SM20 advertised as on sale for $16.97, regular price $18.97. Calculator shown is not this model.
Currently not on view
date made
ca 1974
Summit International Corporation
place made
United States: Utah, Salt Lake City
Physical Description
plastic (case; keys; display cover material)
paper (stickers material)
metal (circuitry material)
overall: 1 in x 2 1/2 in x 4 1/2 in; 2.54 cm x 6.35 cm x 11.43 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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