Non-standard positional numeral systems

class of binary encodings of decimal numbers where each decimal digit is represented by a fixed number of bits, usually four or eight. Special bit patterns are sometimes used for a sign or for other indications

ordering of binary strings such that subsequent strings differ only in one bit

numeral system used in ancient Babylonia

numeral system that uses the digits −1, 0, and 1

non-standard positional numeral system

mixed radix numeral system adapted to numbering permutations; represents a number as a×0! + b×1! + c×2! + ⋯

universal code

complementary binary-coded decimal which assigns a group of 4 bits to each decimal digit: 0→0000, 1→0001, 2→0010, 3→0011, 4→0100, 5→1011, 6→1100, 7→1101, 8→1110, 9→1111

positional numeral system

Enthropy coding methods

non-standard numeral system

positional numeral system with signed digits; the representation may not be unique

positional numeral system in which positions have different numerical bases

any positional numeral system that uses a base or digit set differently from standard positional systems