Commodore SR-1400 Handheld Electronic Calculator
date: label: date made
content: 1974-1975
name: label: maker
content: Commodore Business Machines, Inc.
notes: label: Description
content: This handheld electronic calculator is designed for scientific use. It has an array of forty-two keys. In addition to ten digit keys, a decimal point key, clear and clear entry keys, four arithmetic function keys, and a total key. The lower portion of the keyboard has change sign and exponent (of two digits) keys. Function keys include squares, degrees converted to radians, radians converted to degrees, powers, common logs, natural logs, exponents (of more than two digits), square roots, trigonometric functions (which can also double as inverse trigonometric functions), inverses, exchange, memory, and parentheses.
label: Description
content: The power switch is at the top right of the keyboard. Behind it is a fourteen-digit red light-emitting diode display. A mark above this reads: commodore. The socket for an adapter is along the top edge.
label: Description
content: A metal tag on the back of the calculator reads in part: ELECTRONIC SLIDE RULE CALCULATOR (/) SR-1400 (/) Please Read Instruction Manual. It gives basic instructions. Further text near the bottom reads: Serial No. 015975 (/) Commodore Business Machines, Inc. U.S.A.
label: Description
content: The calculator has two Mostek chips. A mark on one reads: MOS (/) MCS2525 (/) 001 2174. A mark on the other reads: MOS (/) MCS2526 (/) 001 2874.
label: Description
content: A December 17, 1974, newspaper advertisement listed the calculator as selling for $99.95
label: Description
content: References:
label: Description
content: <I>Los Angeles Times</I>, November 15, 1974, p. G9. Advertised as selling for $99.95.
label: Description
content: <I>Los Angeles Times</I>, August 31, 1975, p. C7. Advertised as on sale for $49.88.
label: Description
content: <I>The Day</I>, December 17, 1974. Advertised as available for $99.95.
label: Location
content: Currently not on view
place: label: place made
content: United States
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: 1986.0988.312
label: catalog number
content: 1986.0988.312
label: accession number
content: 1986.0988
objectType: label: Object Name
content: electronic calculator
physicalDescription: label: Physical Description
content: plastic (keys; case; display window material)
label: Physical Description
content: metal (circuitry material)
label: Physical Description
content: glass (tube material)
label: Measurements
content: overall: 1 in x 3 in x 6 in; 2.54 cm x 7.62 cm x 15.24 cm