Texas Instruments Concept II Handheld Electronic Calculator
date: label: date made
content: 1976
name: label: maker
content: Texas Instruments
notes: label: Description
content: Texas Instruments continued to manufacture calculators sold by other companies. This example was marketed by the Zayre department store chain. The handheld electronic calculator has a black plastic case and a metal keyboard. It has an array of twenty-four rectangular black plastic keys. The meaning of the keys is indicated on the keyboard. There are ten digit keys, a decimal point key, a total key, four arithmetic function keys, a clear key, a clear entry key, a change sign key, and a percentage key. Above these is a row of four memory keys. The on/off switch is on the left edge. A mark above keyboard on the left reads: TEXAS INSTRUMENTS. Behind the keyboard is an eight-digit LED display. A mark below the keys reads: CONCEPT II.
label: Description
content: A jack for a power outlet is along the back edge. A sticker on the back reads: US PAT 3819921 AND OTHER PATS PENDING (/) TEXAS INSTRUMENTS (/) Concept II (/) Serial No. 1027861. It also reads in part: ASSEMBLED IN USA. Below the sticker is a compartment for a nine-volt battery. A mark below it reads: 4276 LTA. Unscrewing four screws on the back of the calculator does not reveal the chip.
label: Description
content: Compare the Concept II calculator with the TI-1250 (1986.0988.053). By 1977 Zayre stores sold different calculators under the Concept name.
label: Description
content: References:
label: Description
content: [Advertisement], <I>Hartford Courant </I>, June 6, 1976, p. 8O, Selling for $14.77, regularly $18.77.
label: Description
content: [Advertisement], <I>Hartford Courant </I>, December 5, 1976, p. 25L. Selling for $13.88, regularly $16.88.
label: Description
content: Online Datamath museum, accessed June 3, 2015.
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: 1986.0988.192
label: accession number
content: 1986.0988
label: catalog number
content: 1986.0988.192
objectType: label: Object Name
content: electronic calculator
label: Other Terms
content: electronic calculator; Handheld
physicalDescription: label: Physical Description
content: plastic (case; keys material)
label: Physical Description
content: metal (keyboard; circuitry material)
label: Physical Description
content: paper (sticker material)
label: Measurements
content: overall: 1 1/4 in x 2 1/2 in x 5 1/2 in; 3.175 cm x 6.35 cm x 13.97 cm