Radio Shack EC-220 Handheld Electronic Calculator

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This relatively inexpensive handheld electronic calculator has an array of eighteen rounded rectangular keys, labeled on the keyboard. These include ten digit keys, a decimal point key, a clear entry/clear key, four arithmetic function keys, a % key, and a total key. A mark next to the top two keys reads: RS. The eight-digit red LED display is behind the keyboard. A mark behind it reads: Radio Shack. A jack for a power supply is on the back edge. The on/off switch is on the left side.
The back of the calculator has a compartment for a nine-volt battery. A sticker on the inside of this compartment reads: 20313D30-02. The calculator has four rubber discs that serve as feet. A sticker on the back reads in part: EC-220 Calculator (/) Catalog No. 65-604. Further text reads: RADIO SHACK A TANDY CORPORATION COMPANY (/) FORT WORTH, TEXAS 76107. Further text reads: Assembled in Mexico. Another mark reads: Ser. No. (/) 267484.
Compare Rockwell 8R (1986.0988.012).
Radio Shack, A Tandy Company, 1976 Electronics Catalog , p. 116, accessed September 22, 2014, at Calculator has a list price of $16.95.
Currently not on view
date made
Tandy Corporation
place made
Physical Description
plastic (case; keys; display cover material)
rubber (feet material)
metal (circuitry material)
paper (sticker material)
overall: 7/8 in x 2 3/4 in x 5 7/8 in; 2.2225 cm x 6.985 cm x 14.9225 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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