APF Mark 25 Memory Handheld Electronic Calculator
date: label: date made
content: ca 1975
name: label: maker
content: APF Electronics
notes: label: Description
content: This handheld electronic calculator has an array of ten white digit keys and five black keys for the four arithmetic operations and percentage. Red keys are for a decimal point, EX, clear entry/clear, equals, four memory functions, and D (display). A vacuum fluorescent display for eight digits and a decimal point is behind the keys. A battery compartment is at the top.
label: Description
content: A mark above the keyboard reads: aPF MARK 25/MEMORY. A silver-colored paper tag on the back gives operating instructions. Toward the bottom of this tag it reads: APF ELECTRONICS INC (/) MODEL MARK 25 (/) SERIAL # K55342 (/) THIS CALCULATOR TO BE USED ONLY WITH APF LISTED A.C. ADAPTER MODEL 710 OR MODEL 716 (/) MADE IN U.S.A. A mark inside the lid of the battery case reads: JAPAN (/) K-140032.
label: Description
content: A February 1975 advertisement in the <I>Los Angeles Times</I> indicates that the APF Mark 25 sold for $24.95 with an additional $4.95 for the power adapter. A November 1975 advertisement in the <I>New York Times</I> indicates that the APF Mark 25 pocket calculator (with eight-digit display) regularly sold for $19.95 and could be purchased for $17.95, with a few dollars more for the power adapter. A February 1976 advertisement in the <I>Los Angeles Times</I> indicates that the APF Mark 25 sold on clearance for $19.99.
label: Description
content: References:
label: Description
content: <I>Los Angeles Times</I>, February 28, 1975, P. A26.
label: Description
content: <I>New York Times</I>, November 2, 1975, p. 46.
label: Description
content: <I>Los Angeles Times</I>, February 27, 1976, p. B9.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Computers
label: See more items in
content: Computers & Business Machines
label: See more items in
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: 1986.0988.165
label: catalog number
content: 1986.0988.165
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
label: Other Terms
content: electronic calculator; Handheld
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: paper (tag material)
label: Physical Description
content: rubber (feet material)
label: Measurements
content: overall: 1 in x 2 7/8 in x 5 3/4 in; 2.54 cm x 7.3025 cm x 14.605 cm