Radio Shack EC-240 Handheld Electronic Calculator

Radio Shack EC-240 Handheld Electronic Calculator

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This handheld electronic calculator has a metal case and twenty-two rectangular plastic keys. In addition to ten digit keys, a decimal point key, four arithmetic function keys, and a total key, it has a clear entry key, a clear key, and keys for display, square root, %, and reverse equals. The on/off switch is at the right of the top row of keys.
A mark below the keyboard reads: Radio Shack. A mark above the keyboard reads: statesman thin. The eight-digit green fluorescent display is at the back.
A jack for a power supply is along the front edge. A mark on the back of the calculator reads: Radio Shack (/) CAT. No. 65-622 MODEL EC-240 (/) POWER SUPPLY 120VAC TAIWAN.
Radio Shack, A Tandy Company, 1977 Catalog No. 276 , p. 152, accessed September 22, 2014, at The price listed is $29.95.
Currently not on view
Object Name
electronic calculator
Other Terms
electronic calculator; Handheld
date made
Tandy Corporation
place made
Physical Description
metal (case; circuitry material)
plastic (keys; trim material)
overall: 3/8 in x 2 3/4 in x 5 in;.9525 cm x 6.985 cm x 12.7 cm
ID Number
catalog number
accession number
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Computers & Business Machines
Handheld Electronic Calculators
Data Source
National Museum of American History
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