a numeration system in which a real number is represented by an ordered set of characters where the value of a character depends on its position

- hexadecimal system
- binary number system
- duodecimal number system
- number representation system
- numeration system
- octal numeration system
- number system
- pure binary numeration system
- decimal system
- binary system
- binary numeration system
- octal number system
- system of numeration
- positional notation
- decimal numeration system
- decimal number system
- sexadecimal number system
- hexadecimal number system
- duodecimal system