This is a list of some binary codes that are (or have been) used to represent text as a sequence of binary digits "0" and "1".
Fixed-width binary codes use a set number of bits to represent each character in the text, while in variable-width binary codes, the number of bits may vary from character to character.
Several different five-bit codes were used for early punched tape systems.
Standard five-bit standard codes are: The following early computer systems each used its own five-bit code: The steganographic code, commonly known as Bacon's cipher uses groups of 5 binary-valued elements to represent letters of the alphabet.
Examples of six-bit binary codes are: See also: Six-bit character codes Examples of seven-bit binary codes are: Data compression systems such as Lempel–Ziv–Welch can compress arbitrary binary data.