Calculator with algebraic operating system

Details Calculator with algebraic operating system Calculator with algebraic operating system

1979-11-19

1982-09-07

Smith, Jerry

Boots, shoes, and leggings

364736, G06F 738, G06F 1502

Patent

active

043487335

ABSTRACT:
Disclosed is an electronic calculator having a data entry unit for inputting numeric data, expressions such as parentheses and hierarchal mathematical commands, an arithmetic unit for performing arithmetic operations on the numeric data, a memory for storing the numeric data and associated hierarchal mathematical commands inputted via the data entry unit and logic circuitry for enabling the arithmetic unit to perform arithmetic operations on numeric data inputted via the data entry unit within a pair of parentheses, the logic circuitry enabling the arithmetic unit to perform a higher order hierarchal mathematical command before a lower order hierarchal command eventhough the higher order command is received after the lower order hierarchal mathematical command.

REFERENCES:
patent: 3720820 (1973-03-01), Cochran
patent: 3971924 (1976-07-01), Ozawa et al.
patent: 3995148 (1976-11-01), Ozawa et al.
patent: 4156903 (1979-05-01), Barton et al.

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