APF Mark 23 Handheld Electronic Calculator
date: label: date made
content: ca 1976
name: label: maker
content: APF Electronics
notes: label: Description
content: This white and black calculator has black number entry and digit keys. It also has white arithmetic function keys, a clear entry/clear key, a percentage key, an x/y exchange key, and an equals key. Pushing a read function key allows one to switch the function of the white keys to memory keys, a square root key, an inverse key, and a square key . The display shows nine digits. The non-printing device has a sealed, rechargeable battery. It fits in a plastic sleeve.
label: Description
content: A mark behind the keyboard reads: aPF MARK 23 (/) Electronic Slide Rule Calculator. A plaque on the back gives operating instructions. A mark on it reads: MARK 23 (/) Model No. Another mark on it reads: J-007440 (/) Serial Number. Another mark there reads: APF ELECTRONICS INC. (/) NEW YORK, N.Y. 10022 (/) MADE IN JAPAN.
label: Description
content: A May 1976 advertisement in the <I>Los Angeles Times</I> lists the APF Mark 23 as regularly priced at $39.95 and on sale for $29.99.
label: Description
content: Reference:
label: Description
content: <I>Los Angeles Times</I>, May 28, 1976. p. D5.
label: Location
content: Currently not on view
place: label: place made
content: Japan
setName: label: See more items in
content: Medicine and Science: Computers
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content: Computers & Business Machines
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content: Handheld Electronic Calculators
creditLine: label: Credit Line
content: Gift of John B. Priser
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.0988.370
label: catalog number
content: 1986.0988.370
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: metal (keyboard material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 1 in x 3 in x 6 1/4 in; 2.54 cm x 7.62 cm x 15.875 cm