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APF Mark 84 Handheld Electronic Calculator

APF Mark 84 Handheld Electronic Calculator

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Description
This handheld electronic calculator has an array of ten white digit keys with a white decimal point key. Right of the digit keys are orange keys for the four aithmetic functions, which also can serve as memory keys. An orange equals/constant key, which can also serve as a memory key, is next to the decimal point key. The top row has keys for percentage, clear entry/clear, and memory. The row also contains an on/off switch. Behind the keyboard is an eight-digit (or possibly nine-digit) fluorescent display. A mark at the back reads: aPF MARK 84. The hole for the adapter is on the right side.
The back of the calculator has a compartment for the battery at the top and two rubber feet at the bottom. A mark on the interior of the battery back reads: 2 (/) JAPAN (/) 0108241. A silver-colored sticker on the back reads: aPF ELECTRONICS, INC. (/) MODEL NO. MARK 84 (/) D.C. 9.0 VOLTS (/) CAUTION: Use only optional (/) A. C. adaptor model 710 or (/) 751S to operate on A. C. (/) SERIAL No: J 0119684 (/) MADE IN JAPAN.
This calculator closely resembles an APF calculator advertised in a March 1977, issue of the Los Angeles Times as selling for $7.99. That advertisement does not give a model number.
Reference:
Los Angeles Times, March 19, 1977, p. 15.
Location
Currently not on view
Object Name
electronic calculator
date made
ca 1977
maker
APF Electronics
place made
Japan
Physical Description
plastic (case; screen; keys material)
metal (electrical connection material)
paper (sticker material)
rubber (feet material)
Measurements
overall: 1 in x 2 3/8 in x 5 in; 2.54 cm x 6.0325 cm x 12.7 cm
ID Number
1986.0988.175
accession number
1986.0988
catalog number
1986.0988.175
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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