Unisonic LC 223 CK Handheld Electronic Calculator

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This credit card-sized calculator has a metal case and twenty-three rectangular plastic keys. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, and four memory keys. The bottom row of keys also has a clear entry/clear key, a square root key, and a percentage key. An on button and an off button are above the keyboard. Left of these, a mark reads: Unisonic (/) LC 223 CK. Left of this is an eight-digit liquid crystal display. A mark on the back of the calculator reads: Unisonic LC223 CKB (/) 1.5V BATTERY x 2 PCS (/) EVEREADY BATTERY NO189 (/) SERIAL NO. 7294327 (/) MADE IN TAIWAN. Unscrewing two screws in the back makes it possible to change the two tiny Toshiba batteries. A mark on the circuit board reads: 102P. A mark on the chip reads: W5.
Compare 1987.0988.322.
For information about Unisonic, see 1986.0988.371.
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Currently not on view
date made
ca 1982
place made
Physical Description
metal (case material)
plastic (keys material)
glass (display material)
overall: 1/4 in x 3 1/2 in x 2 1/4 in; .635 cm x 8.89 cm x 5.715 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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