Electronic data processing apparatus with equation operating sys

Details Electronic data processing apparatus with equation operating sys Electronic data processing apparatus with equation operating sys

1984-02-29

1985-05-21

Malzahn, David H.

Boots, shoes, and leggings

364715, G06F 748, G06F 302

Patent

active

045190453

ABSTRACT:
The equation operating system is an improved data and command entry format together with a compatible operation system for use with electronic data processing apparatuses, most particularly with scientific calculators which provide an alphanumeric display of entered equations. This invention also includes a unary operation implementation technique, whereby the operand may be entered either before or after the unary operation.

REFERENCES:
patent: 3781820 (1973-12-01), Cochran et al.
patent: 4053753 (1977-10-01), Sado et al.
patent: 4302816 (1981-11-01), Yamamoto
patent: 4412300 (1983-10-01), Watson et al.

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