The REC is Windows software that lets you choose between 6 different calculators at the Click of your mouse, and 15 discrete calculators for the more complex functions plus you can write your own programs to solve your most elaborate equations.
This RPN Calculator offers a choice of more than 250 solutions and thousands of conversion possibilities with eight unique keypads. A "Tip of the Day" is displayed when you start the program (it can be turned off), It has a complete help system and individual tips for all but the most ordinary functions. The calculator has a Running Tape Display showing all entries and solutions for each session as well as the operation just performed, or the units (Hz, °, Hy, etc.) of the result.
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