Unisonic LC 222 Handheld Electronic Calculator

Description
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 an off key, an on/clear entry/clear key, and a percentage key. A mark above the keyboard reads: Unisonic (/) LC 222. Left of this is an eight-digit liquid crystal display. A mark on the back of the calculator reads: Unisonic LC222C MADE IN TAIWAN. Unscrewing two screws in the back makes it possible to change the two tiny batteries (no batteries in this example), According to the instructions, one should “use quality alkaline batteries such as Maxell [sic] SR 1130. You can expect to get about 1000 hours of continuous operating time for batteries.” A mark on the circuit board reads: LSIT6014 (/) LCD 3001.
The calculator has a cloth case that also includes the instruction leaflet. It has the title Unisonic LC-222 Ultra Thin LCD Calculator.
Compare 1987.0435.14.
For information about Unisonic, see 1986.0988.371.
References:
Instruction leaflet.
[Advertisement], Hartford Courant, December 7, 1980, p. Q10. LC 222 and LC 272 calculators both on sale for $8.99, regularly $11.99.
[Advertisement]. Los Angeles Times, March 8, 1981, p. SG5. LC 222 calculator on sale for $8.90, regularly $10.90. Neither of these advertisements mentions the LC 222C.
Location
Currently not on view
date made
ca 1981
maker
Unisonic
place made
Taiwan
Physical Description
plastic (keys material)
cloth (carrying case material)
metal (case material)
glass (display material)
Measurements
overall: 3/8 in x 3 1/2 in x 2 1/8 in; .9525 cm x 8.89 cm x 5.3975 cm
ID Number
1986.0988.322
catalog number
1986.0988.322
accession number
1986.0988
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, Kenneth E. Behring Center

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