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.

Unisonic LC 223 CK Handheld Electronic Calculator

Unisonic LC 223 CK Handheld Electronic Calculator

<< >>
Usage conditions apply
This credit card-sized calculator has a metal case and twenty-three rectangular plastic keys. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, and four memory keys. The bottom row of keys also has a clear entry/clear key, a square root key, and a percentage key. An on button and an off button are above the keyboard. Left of these, a mark reads: Unisonic (/) LC 223 CK. Left of this is an eight-digit liquid crystal display. A mark on the back of the calculator reads: Unisonic LC223 CKB (/) 1.5V BATTERY x 2 PCS (/) EVEREADY BATTERY NO189 (/) SERIAL NO. 7294327 (/) MADE IN TAIWAN. Unscrewing two screws in the back makes it possible to change the two tiny Toshiba batteries. A mark on the circuit board reads: 102P. A mark on the chip reads: W5.
Compare 1987.0988.322.
For information about Unisonic, see 1986.0988.371.
No advertisements found.
Currently not on view
Object Name
electronic calculator
date made
ca 1982
place made
Physical Description
metal (case material)
plastic (keys material)
glass (display material)
overall: 1/4 in x 3 1/2 in x 2 1/4 in;.635 cm x 8.89 cm x 5.715 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