APF Mark 21 Handheld Electronic Calculator
date: label: date made
content: ca 1976
name: label: maker
content: APF Electronics
notes: label: Description
content: This white and black battery-operated calculator has number entry keys, arithmetic function keys, and memory function keys. It also has a clear entry/clear key, a percent key, and an EX key, as well as a decimal point key. There is a nine-digit display. The non-printing device has a sealed, rechargeable battery.
label: Description
content: A mark behind the keyboard reads: aPF MARK 21 (/) Electronic Memory Calculator. A plaque on the back gives operating instructions. A mark on it reads: MARK 21 (/) Model No. Another mark on it reads: R-009175 (/) Serial Number. Another mark there reads: APF ELECTRONICS (/) NEW YORK, N.Y. 10022 (/) MADE IN JAPAN. A very small mark in the bottom corner of the plaque reads: 215901.
label: Description
content: An October 1976 advertisement in the <I>New York Times</I> lists the APF Mark 21 as regularly priced at $24.99 and on sale for $19. An April 1977 ad in the <I>Los Angeles Times</I> lists the APF Mark 21 as selling regularly for $19.99 and available, with the exchange of any calculator, for a sale price of $14.99.
label: Description
content: References:
label: Description
content: <I>Los Angeles Times</I>, April 13, 1977, p. A10.
label: Description
content: <I>New York Times</I>, October 17, 1976, p. 380.
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: 1986.0988.369
label: catalog number
content: 1986.0988.369
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: metal (overall 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