(arithmetic, logic) A notation for arithmetic (and 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 A AND B is written as AND A B.

(mathematics) a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10

Polish notation

(chess) A method for recording and describing the moves in a game of chess which employs a single uppercase letter for each piece and a letter-number coordinate for each square.

A notation for numbers in which the value of a digit depends on its position in the string, examples of which include the decimal system and the binary system

plural of abuse of notation

Originally, "A/S/c", with "A" the arrival process, "S" the distribution of service time required, and "c" the number of servers.

(mathematics) The use of a mathematical notation in a way that is not formally correct but seems likely to simplify the exposition or suggest the correct intuition.

(physics) A mathematical notation using indices to label the components of vectors and tensors.

(music) neumatic notation