- A manner of forming mathematical or logical expressions, in which the operators appear before or after, but not between the operands. When utilizing Polish notation parenthesis are never used, which is better suited for the way digital computers ordinarily evaluate expressions. Polish notation may be in the form of prefix notation or postfix notation. Also called parenthesis-free notation.
- A manner of forming mathematical or logical expressions in which the operators appear before the operands. For example, (A + B) × C, which is in infix notation, would appear as *+ABC in Polish notation. The same expression would appear as ABC+* in reverse Polish notation. Also called prefix notation, or Lukasiewicz notation.
- synonymparenthesis-free notation
- synonymprefix notation