Unisonic 1011-A Handheld Electronic Calculator

This handheld electronic calculator has a metal and plastic case with an array of nineteen square plastic keys. These include ten digit keys, a decimal point key, four arithmetic function keys, a total key, a clear key, a clear entry key, and a percentage key (the last is orange). A mark above the keys reads: Unisonic 1011. The on/off switch is right of this. Behind this is an eight-digit green vacuum fluorescent display. A jack for a power supply is along the back edge. A sticker on the back gives calculation examples. Text on it reads: SERIAL NO. (/) 042340 (/) MADE IN JAPAN. It also reads: 1011-A. Below this is a compartment for four AAA batteries.
Compare 1986.0988.119.
[Advertisement], Morning Herald [from Hagerstown, Maryland], November 28, 1975, p. 49. Selling Unisonic 1011 for $16.88.
Currently not on view
Object Name
electronic calculator
date made
ca 1975
Physical Description
plastic (case; keys material)
metal (case; circuitry material)
glass (display material)
paper (overallsticker material)
overall: 1 1/4 in x 3 1/4 in x 5 1/4 in; 3.175 cm x 8.255 cm x 13.335 cm
place made
ID Number
accession number
catalog number
Computers & Business Machines
Handheld Electronic Calculators
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of John B. Priser
Additional Media

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