Sharp EL104 Handheld Electronic Calculator

This handheld electronic calculator has a black and white plastic case and an array of twenty rounded rectangular plastic keys. These include ten digit keys, a decimal point key, a % key, four arithmetic function keys, a clear key, a clear entry key, a square root key, and a total key. Behind the keyboard is an eight-digit purple LED display that seems to have a ninth character space. The on/off switch is behind the display on the right. A tag left of this reads: SHARP ELSI MATE (/) EL-104.
At the top of the back is a compartment for a nine-volt battery. Text below this reads: ELECTRONIC CALCULATOR (/) EL-104. Further text reads: SHARP CORPORATION (/) MADE IN JAPAN BM. A paper sticker below the mark gives a list of U.S., Canadian, Swedish and Australian patents protecting the device. The latest American patent is 3621219, issued in 1971 and initially assigned to Hayakawa.
The calculator has a leather or imitation leather carrying case with a metal snap and plastic edging. This case also has a hook so that it could be worn over a belt.
Compare 1986.0988.133 (Sharp Elsimate EL-206).
The online MyCalc database dates this calculator to about 1976. The online database dates it to 1976. No advertisements found.
Currently not on view
Object Name
electronic calculator
date made
Sharp Corporation
Physical Description
plastic (case; keys; carrying case; display cover material)
metal (circuitry; carrying case snap material)
paper (sticker material)
overall: 7/8 in x 3 in x 4 1/2 in; 2.2225 cm x 7.62 cm x 11.43 cm
place made
ID Number
catalog number
accession number
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History, Kenneth E. Behring Center


Add a comment about this object