olemus
Wiktionary:
3. (programming) the position of an operator relative to its operand (prefix, postfix) or operands (infix)

ülevaateid
https://www.cs.man.ac.uk/~pjj/cs212/fix.html

https://en.wikipedia.org/wiki/Polish_notation

https://en.wikipedia.org/wiki/Reverse_Polish_notation

https://en.wikipedia.org/wiki/Infix_notation