Unisonic LC 222 Handheld Electronic Calculator

Description:

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 an off key, an on/clear entry/clear key, and a percentage key. A mark above the keyboard reads: Unisonic (/) LC 222. Left of this is an eight-digit liquid crystal display. A mark on the back of the calculator reads: Unisonic LC222C MADE IN TAIWAN. Unscrewing two screws in the back makes it possible to change the two tiny batteries (no batteries in this example), According to the instructions, one should “use quality alkaline batteries such as Maxell [sic] SR 1130. You can expect to get about 1000 hours of continuous operating time for batteries.” A mark on the circuit board reads: LSIT6014 (/) LCD 3001.

The calculator has a cloth case that also includes the instruction leaflet. It has the title Unisonic LC-222 Ultra Thin LCD Calculator.

Compare 1987.0435.14.

For information about Unisonic, see 1986.0988.371.

References:

Instruction leaflet.

[Advertisement], Hartford Courant, December 7, 1980, p. Q10. LC 222 and LC 272 calculators both on sale for $8.99, regularly $11.99.

[Advertisement]. Los Angeles Times, March 8, 1981, p. SG5. LC 222 calculator on sale for $8.90, regularly $10.90. Neither of these advertisements mentions the LC 222C.

Date Made: ca 1981

Maker: Unisonic

Location: Currently not on view

Place Made: Taiwan

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

Exhibition:

Exhibition Location:

Credit Line: Gift of John B. Priser

Data Source: National Museum of American History

Id Number: 1986.0988.322Catalog Number: 1986.0988.322Accession Number: 1986.0988

Object Name: electronic calculator

Physical Description: plastic (keys material)cloth (carrying case material)metal (case material)glass (display material)Measurements: overall: 3/8 in x 3 1/2 in x 2 1/8 in; .9525 cm x 8.89 cm x 5.3975 cm

Guid: http://n2t.net/ark:/65665/ng49ca746ac-c091-704b-e053-15f76fa0b4fa

Record Id: nmah_1363778

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.