Sharp EL-428 ELSI MATE

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This hybrid calculator has the standard four arithmetic functions, plus square root, percentage, and memory functions. It also has a soroban (a Japanese style of abacus) attached, the soroban being quicker for simple arithmetic such as addition and subtraction, while the calculator would be used for multiplication and division.

This example in our collection was purchased in August 1983 in Kyoto by Dr W J Herbert during a congress of the International Union of Immunological Societies.

Manufacturer: Sharp
Date: August 1983

Other Systems Related To Sharp EL-428 ELSI MATE:

Item	Manufacturer	Date
Sharp EL-1611A Electronic Calculator	Sharp	Unknown
Sharp EL-1607L	Sharp	Unknown
Sharp EL-811A Electronic Calculator	Sharp	1972
Sharp CS-1151 Compet	Sharp	1976
Sharp Elsimate EL-8117K Electronic Calculator	Sharp	1977
Sharp Elsimate EL-8130 Arithmetic Calculator	Sharp	1977
Sharp EL-8031 Electronic Calculator	Sharp	1978
Sharp EL-8140 calculator	Sharp	1978
Sharp EL-8131 Electronic Calculator	Sharp	1979
Sharp EL-835 Elsimate Calculator	Sharp	1982
Sharp PC-1245	Sharp	1983
Sharp EL-6190 Memo Master Alarm 500	Sharp	1990
Sharp ZQ-1350 32KB Electronic Organizer	Sharp	1990
Sharp EL-9300 Graphics Scientific Calculator	Sharp	1992
Sharp EL-531LH Electronic Calculator	Sharp	1995

This exhibit has a reference ID of CH36268. Please quote this reference ID in any communication with the Centre for Computing History.

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