Summit Ko8 Handheld Electronic Calculator

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This relatively early American handheld electronic calculator has an off-white plastic case and an array of eighteen indented plastic keys (the Texas Instruments Klixon type), most of them square. The zero key and the decimal point key are rectangular. In addition to ten digit keys, a decimal point key and four arithmetic function keys, the calculator has a clear entry key, a clear key, and a display key. Left of the three topmost keys is a dial used to set the position of the decimal point in the display. Behind the keys is an eight-digit red LED display. Right of it are an on/off switch and a constant switch. A sticker along the front edge reads: Summit.
A jack for a power adapter is on the front side.
A sticker on the back gives operating instructions. It reads in part: SUMMIT INTERNATIONAL CORP. (/) Serial No. 110501A Model Ko8 (/) Salt Lake City, Utah (/) MANUFACTURED BY NCE NUCLEAR (/) made in U.S.A.
[Advertisement], The Times (San Mateo, California), June 14, 1972, p. 50. Calculator advertised as selling for $139.95.
[Advertisement], Chicago Tribune, June 25, 1972, p. N10. Calculator advertised as selling for $189.
[Advertisement], Express and News (San Antonio), October 8, 1972, p. 18. Calculator described in detail, advertised as on sale for $139.95.
[Advertisement], Chicago Tribune, November 23, 1972, p. N7. Calculator on sale for $114.88, regular price $189.
[Advertisement], Chicago Tribune, January 18, 1973, p. A13. Calculator on sale for $109.88, regular price $189.50.
Currently not on view
date made
Summit International Corporation
place made
United States: Utah, Salt Lake City
Physical Description
plastic (case; keys; display cover material)
metal (circuitry material)
paper (sticker material)
overall: 1 1/4 in x 2 3/4 in x 4 in; 3.175 cm x 6.985 cm x 10.16 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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