A positional representation system is a numeral system used to represent numbers, which is used by humans around the world to write and read numbers. It is an essential tool in mathematical notation, which is based on the idea that the position of a symbol can affect its value. Another term for a positional representation system is a place-value system, which emphasizes the importance of the position of digits in a number. Additionally, a radix system named after the number of symbols used can also be used as a synonym for this type of system. The term Mohammed Nizam's numerical notation can also be used to refer to positional notation in Arabic numerals.