Radio Shack EC-242 Handheld Electronic Calculator

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This handheld electronic calculator has a gray plastic case, a black keyboard, and twenty-two rectangular plastic keys. The meaning of the keys is written above them on the keyboard. Keys include ten digit keys, a decimal point key, a clear/clear entry key, four arithmetic function keys, a total key, two memory keys, an on key, and an off key. Behind the keyboard is an eight-digit red LED display. Text behind this reads: Radio Shack (/) MEMORY EC-242.
A compartment for a nine volt battery is at the top of the back. A jack for a power adapter is along the back edge. A sticker below the compartment reads: Radio Shack (/) Cat. No. : 65-617 (/) Model : EC-242 (/) DC : 9V (006P x 1) (/) For 120V AC Operation (/) Use AC Adaptor 65-731 (/) Custom Mfd. in Hong Kong for (/) RADIO SHACK. A Division of Tandy Corp. (/) 7J-207.
Radio Shack advertised this “low-priced memory calculator” as “a real budget-master.”
Compare 1986.0988.044 (Radio Shack EC-243).
Radio Shack, A Tandy Company, 1978 Catalog No. 289, p. 146, accessed September 22, 2014, at The price listed is $8.88.
Currently not on view
date made
Tandy Corporation
place made
Zhonghua: Hong Kong
Physical Description
plastic (case; keys; display cover material)
metal (circuitry material)
paper (sticker material)
overall: 1 in x 2 3/4 in x 5 1/2 in; 2.54 cm x 6.985 cm x 13.97 cm
ID Number
catalog number
accession number
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History


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