Our museum is temporarily closed to support the effort to contain the spread of COVID-19. Read a message from our director, and check our website and social media for updates.

Radio Shack EC-300 Handheld Electronic Calculator

Radio Shack EC-300 Handheld Electronic Calculator

<< >>
Usage conditions apply
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 radioshackcatalogs.com. Calculator has a list price of $114.95.
Currently not on view
Object Name
electronic calculator
date made
Tandy Corporation
Physical Description
plastic (case; keys; carrying case material)
metal (circuitry material)
paper (sticker material)
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
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
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object