Radio Shack EC-300 Handheld Electronic Calculator


This relatively early handheld electronic calculator has a brown and tan plastic case and twenty-four square plastic keys. These include ten digit keys, a decimal point key, a D key for refreshing the display, a total key, four arithmetic function keys, a % key, a clear entry/clear key, and a negative entry key. The top row of the keyboard has four memory keys. Behind the keys on the right is an on/off switch. Behind this is an eight-digit LED display. A mark above the display reads: Radio Shack. The back edge has a cord for charging.

The back of the calculator has a sticker with “abbreviated instructions.” Text at the bottom of this reads: RADIO SHACK A TANDY CORPORATION COMPANY (/) FORT WORTH, TEXAS 76107 (/) RADIO SHAK MODEL EC-300 (/) SERIAL NO. A2 300-20590.

The calculator has a black plastic zippered carrying case with a cloth cord.

Compare 1986.0988.035.


Radio Shack, A Tandy Company, 1974 Electronics Catalog , p. 66, accessed September 22, 2014, at Calculator has a list price of $114.95.

Date Made: 1974

Maker: Tandy Corporation

Location: Currently not on view

See more items in: Medicine and Science: Computers, Computers & Business Machines, Handheld Electronic Calculators


Exhibition Location:

Credit Line: Gift of John B. Priser

Data Source: National Museum of American History

Id Number: 1986.0988.037Catalog Number: 1986.0988.037Accession Number: 1986.0988

Object Name: electronic calculatorOther Terms: electronic calculator; Handheld

Physical Description: plastic (case; keys; carrying case material)metal (circuitry material)paper (sticker material)Measurements: overall: 1 3/4 in x 3 1/8 in x 5 3/4 in; 4.445 cm x 7.9375 cm x 14.605 cm


Record Id: nmah_334451

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