Casio Memory-8A Handheld Electronic Calculator - Model CD-813
date: label: date made
content: 1974-1976
name: label: maker
content: Casio Computer Company
notes: label: Description
content: This handheld electronic calculator has a gray and cream-colored plastic case, and square plastic keys. In addition to an array of ten digit keys, it has a decimal point key, a total key, and four arithmetic function keys to the right of the digit keys. Immediately above the digit keys are AC (all clear), C (clear entry), square root, and percentage keys. Above this is a switch for setting the result to floating point arithmetic or to round off with two decimal points, and three memory keys.
label: Description
content: Behind the keyboard is an eight-digit vacuum fluorescent display. A mark above this reads: CASIO memory-8A (/) ELECTRONIC CALCULATOR.
label: Description
content: The back of the calculator has a compartment for two batteries. The batteries and compartment cover are lacking. A sticker inside the compartment reads: 4036264. A tag below the battery compartment reads: CASIO memory-8A (/) BATTERY SUPPLY 1.5Vx2 (/) or use AC ADAPTOR AD-2S (/) 0.2W (/) CD-813 MADE IN JAPAN (/) BM CASIO COMPUTER CO., LTD. The socket for the adapter is along the top edge.
label: Description
content: Opening the calculator reveals two circuit boards with assorted circuits. The largest of these has the inscription: NEC (/) μP0977C R56696. This object is somewhat different from the Casio Memory-8A described at the Vintage Technology website.
label: Description
content: The calculator fits in a black plastic sleeve. A mark on the sleeve reads: JAPAN.
label: Description
content: According to the Casio web site, this model was introduced in 1974. An October 1975 advertisement for several Casio calculators with memory asked: “When you’ve got a Casio Memory, who needs an elephant?" It indicates that the suggested retail price of this model was then $24.95. Further advertisements appeared in 1976.
label: Description
content: References:
label: Description
content: <I>Chicago Tribune</I>, October 21, 1975, p. B3.
label: Description
content: <I>Chicago Tribune</I> May 26, 1976, p. B10.
label: Description
content: Vintage Technology website.
label: Description
content: Casio Corporation website.
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: 1986.0988.212
label: catalog number
content: 1986.0988.212
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: plastic (case; display screen; keys; carrying case material)
label: Physical Description
content: glass (tube material)
label: Physical Description
content: paper (sticker material)
label: Physical Description
content: metal (circuitry material)
label: Measurements
content: overall: 7/8 in x 3 in x 5 1/4 in; 2.2225 cm x 7.62 cm x 13.335 cm