Download  RPN Scientific Calculator for Mac OS 1.2.4
RPN Scientific Calculator for Mac OS 1.2.4 
Planet Harmony Technologies 
A calculator with many mathematical functions, mathematical and physical constants, units conversions and memory registers. Utilizes stack based postfix style architecture.
 Added option to display irrationals: π, e, √2 or √3.
 Fixed data entry bug that occurred when a decimal point (or comma) is typed immediately after entering a number in exponential format.

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