|Noun||1.||postfix notation - a parenthesis-free notation for forming mathematical expressions in which each operator follows its operands|
|(language)||postfix notation - (Or "Reverse Polish Notation", RPN) One of the
possible orderings of functions and operands: in postfix
notation the functions are preceded by all their operands.
For example, what may normally be written as "1+2" becomes "1
2 +". Postfix notation is well suited for stack based
architectures but modern compilers reduced this advantage
The best-known language with postfix syntax is FORTH. Some Hewlett-Packard calculators use it, e.g. HP-25, HP-29C, HP-41C, HP-23SII.
Compare: infix notation, prefix notation.