Texas Instruments SR-40 Handheld Electronic Calculator
date: label: date made
content: 1977
name: label: maker
content: Texas Instruments
notes: label: Description
content: This scientific handheld electronic calculator has a black plastic case with an array of forty small rectangular plastic keys. The ten digit keys, decimal point key, and change sign key are white. The total key and the four arithmetic function keys are gold. The brown keys include keys for reciprocals, squares, square roots, off, on/clear, inverse functions, sines, cosines, tangents, degrees, constant, enter exponent, common logarithms, natural logarithms, powers, pi, percentage, left parenthesis, and right parenthesis. The remaining brown keys are storage, recall, summation, and exchange.
label: Description
content: Text above the keys reads: SR-40. Text behind this reads: TEXAS INSTRUMENTS. Behind the keyboard is an LED display that shows eight-digit positive and negative numbers and two-digit positive and negative exponents.
label: Description
content: The calculator has a jack for a recharger/adapter along the right edge.Text on the back reads in part: TEXAS INSTRUMENTS (/) electronic calculator. It also gives the serial number 709159 and a date mark: LTA1277. It also reads: ASSEMBLED IN USA. Below these marks is a compartment for a TI battery pack BP-7. According to the instructions, the batteries in the battery pack could be recharged using an AC adapter/charger AC9131.
label: Description
content: There are no screws for disassembling the calculator.
label: Description
content: The calculator comes in a black plastic, cloth-lined, zippered carrying case with belt loop. Also in the case is a manual with the title <I>Texas Instruments electronic slide-rule calculator SR-40 Owner’s Manual</I>. The name Guy E. Richardson has been blacked out.
label: Description
content: References:
label: Description
content: [Advertisement], <I>Los Angeles Times</I>, October 30, 1976, p. C2. Gives price of $33.95, advertises calculator as successor to the SR-50A.
label: Description
content: [Advertisement], <I>Chicago Tribune</I>, April 6, 1977, p. A11. Gives price of $39.95.
label: Description
content: [Advertisement], <I>Los Angeles Times</I>, September 7, 1977, p. C16. Sale price $25.99, regular price $29.95.
label: Description
content: [Advertisement], <I>Boston Globe</I>, January 15, 1978, p. 89. Gives price of $19.99.
label: Location
content: Currently not on view
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: 1986.0988.049
label: catalog number
content: 1986.0988.049
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; carrying case material)
label: Physical Description
content: metal (circuitry material)
label: Physical Description
content: paper (manual material)
label: Measurements
content: overall: 1 1/4 in x 3 in x 5 3/4 in; 3.175 cm x 7.62 cm x 14.605 cm