Calfax 820CD Handheld Electronic Calculator
date: label: date made
content: 1974-1975
name: label: maker
content: Calfax
notes: label: Description
content: This handheld electronic calculator has a plastic case with aluminum trim. The square plastic keys are indented at the middle (going from top to bottom). In addition to an array of ten digit keys and a decimal key, the calculator has keys for four arithmetic functions, a total key, a constant key, a red cancel key, and an on/off switch.
label: Description
content: Behind the keyboard is an eight-digit red LED display.
label: Description
content: A mark behind the display reads: calfax 820CD. A socket for an adapter is on the top edge. This example has no adapter.
label: Description
content: The battery compartment at the top of the back would hold two batteries. No batteries or cover for the compartment are in the present example. A tag on the back gives an “Operating Outline” for the calculator. It includes a mark at the bottom: Made in Hong Kong.
label: Description
content: The "calfax" mark on the calculator uses a trademark reportedly first used in commerce in 1972, filed in the United States January 1973, and registered in September 1975. No trademark registration is indicated on this example.
label: Description
content: No serial number found.
label: Description
content: Compare 1988.0988.20.
label: Location
content: Currently not on view
place: label: place made
content: China: Hong Kong
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: 1986.0988.021
label: catalog number
content: 1986.0988.021
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 (case; keys; display window material)
label: Physical Description
content: metal (trim material)
label: Physical Description
content: paper (sticker material)
label: Measurements
content: overall: 7/8 in x 3 in x 5 1/2 in; 2.2225 cm x 7.62 cm x 13.97 cm