Toko TD-802D Handheld Electronic Calculator

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According to the Toko, Inc., website, Toko was established in Tokyo in 1955 as a manufacturer of components for portable radios with the name TOKO Radio Coil Laboratories. The firm continues to manufacture electronic components.
This relatively large handheld electronic calculator has a plastic case and eighteen square keys with rounded corners. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, a clear entry key, and a clear key. A switch on the right of the top row of keys can be set to having the constant (K) on or off. Behind this is an on/off switch. Test left of it reads: TOKO MINI-8. Behind this is an eight-digit green vacuum fluorescent display. A jack for a power adapter is on the right side.
At the base of the back is a compartment for four AA batteries. A mark on the cover reads: JAPAN. A sticker above the compartment gives “CALCULATION EXAMPLES.” Text at the base of the sticker reads: TD-802D SERIAL No. 834181. The back is held to the front by four metal screws. Unscrewing these, one finds a Texas Instruments chip marked: TMS0101ANCΔ (/) 7351.
No advertisements found.
Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. 161.
Toko, Inc., website, accessed June 3, 2015.
Currently not on view
date made
ca 1973
place made
Physical Description
plastic (case; keys; display cover material)
metal (circuitry material)
paper (sticker; key stickers material)
overall: 1 1/4 in x 3 1/2 in x 5 7/8 in; 3.175 cm x 8.89 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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