Unitrex 91PM Handheld Electronic Calculator

Description:

This handheld electronic calculator has a gray and black plastic case with an array of twenty-three square plastic keys. These include ten digit keys, a decimal point key, a total key, four arithmetic function keys, four memory keys, a percentage key, a clear key, and a clear entry key. Right of the top three keys is an on/off switch. Behind this is an eight-digit red LED display. A mark behind this reads: UNITREX 91PM.

A power jack is on the right side near the bottom.

The back of the calculator has a compartment for a nine-volt battery at the top. A sticker below this reads: ELECTRONIC CALCULATOR (/) DC 9 VOLT (/) USE 1 PIECE 9 V BATTERY (/) MADE IN HONG KONG.

Reference:

[Advertisement], Chicago Tribune, January 30, 1977, p. M1. Calculator on sale for $8.88, regularly $9.95. “Save $2”!

Date Made: ca 1977

Maker: Eiko Business Machine Company

Location: Currently not on view

Place Made: China: Hong Kong

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: 1986.0988.243Catalog Number: 1986.0988.243Accession Number: 1986.0988

Object Name: electronic calculator

Physical Description: plastic (case; keys material)metal (circuitry material)paper (sticker material)Measurements: overall: 1 in x 2 in x 5 3/8 in; 2.54 cm x 5.08 cm x 13.6525 cm

Guid: http://n2t.net/ark:/65665/ng49ca746b2-b815-704b-e053-15f76fa0b4fa

Record Id: nmah_1305773

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.