Category:TI SR-56

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The Texas Instruments SR-56 is a programmable calculator manufactured in 1976 and 1977.

These calculators have 100 steps (bytes) of program memory, ten general-purpose registers (0-9) and a test register (t) for conditional branching.

Unlike its Hewlett-Packard competitors, the SR-56 does not use Reverse-Polish Notation (RPN), but standard infix math with operator precedence.