Unisonic 830-A Handheld Electronic Calculator

Description
This handheld electronic calculator has a black- and silver-colored plastic and metal case with an array of twenty-one square plastic keys. These include ten digit keys and a decimal point key (white) as well as four arithmetic function keys, a total key, a clear key, a clear entry key, and a percentage key (turquoise). The square root and change sign keys in the topmost row are orange. Right of these, a mark scratched on the case reads: UNISONIC-830A. Right of this is an on/off switch. Behind is an eight-digit green vacuum fluorescent display. A power jack is on the back edge.
A paper sticker on the back gives calculation examples. It reads in part: 830A. It also reads: SERIAL NO. (/) 004991 (/) MADE IN JAPAN. Below this is a compartment for four 1.5V (AAA) batteries.
Compare 1986.0988.114 (a Unisonic 811-A). That calculator lacks the square root and change sign keys.
No references found.
Location
Currently not on view
Object Name
electronic calculator
date made
ca 1977
maker
Unisonic
Physical Description
plastic (case; keys material)
metal (trim; circuitry material)
glass (display material)
paper (sticker material)
Measurements
overall: 1 1/8 in x 3 1/4 in x 5 1/4 in; 2.8575 cm x 8.255 cm x 13.335 cm
ID Number
1986.0988.113
accession number
1986.0988
catalog number
1986.0988.113
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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