National Semiconductor 99 Handheld Electronic Calculator

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This compact handheld electronic calculator has a brown plastic case, a metal keyboard and display trim, and twenty-five rectangular plastic keys. In addition to ten digit keys, a decimal point key, four arithmetic function keys, a change sign key, a total key, a clear entry/clear key, an off key, and four memory keys, it has a square root key and a % key. Text above the keyboard reads: NSC National Semiconductor 99. Behind this are three brightly colored circles. Behind this is an eight-digit LCD display.
The back of the calculator has a compartment for two small batteries. A sticker next to it reads: NSC National Semiconductor (/) WEST JORDAN, (/) UTAH 84084 (/) MODEL 99 (/) MADE IN HONG KONG.
[Advertisement], Los Angeles Times, December 7, 1978, p. OC_A8. Calculator sells for $9.99.
[Advertisement], Washington Post, April 9, 1979, p. D10. Calculator listed as giveway of a bank to depositors of $5000 or more, $8.95 to depositors of $100-$1000.
Currently not on view
date made
National Semiconductor Corporation
place made
Zhonghua: Hong Kong
Physical Description
metal (case; keys; circuitry material)
paper (sticker material)
overall: 3/16 in x 2 3/4 in x 4 5/8 in; .4826 cm x 6.985 cm x 11.7475 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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