(arithmetic, logic) A notation for arithmetic (logical) formulae in which operations (respectively, quantifiers and operands) are written immediately before their operands, used to avoid the need for parentheses; for example, 3 * (4 + 7) is written as * 3 + 4 7 and AANDB is written as AND AB.
After the nationality of the logician Jan Åukasiewicz
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polish notation - Computer Definition
A method for expressing a sequence of calculations developed by the Polish logician Jan Lukasiewicz in 1929. For example, A(B+C) would be expressed as
* A + B C. In reverse Polish notation, it would be A B C + *.