A machine for the mechanical performance of mathematical operations, for the most part invented by Charles Babbage and G. and E. Scheutz. It computes logarithmic and other mathematical tables of a high degree of intricacy, imprinting the results on a leaden plate, from which a stereotype plate is then directly made.


RPN (an acronym for Reverse Polish Notation) is method of entering input in to a calculator without the use of parenthesis. Reverse Polish Notation is more appropriately referred to as Operator Postfix Notation. Many engineers use this form of inputing, for it is more logical and less key strokes to enter complex equations. This notation is found in many HP models.
Texas Instruments graphing calculator related information. TI graphing calculators are the most popular line of graphing calculators, are programmable, and allow a wide variety of math functions and games.
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