Character

In computing, characters are "mapped" to character sets, which are used to display text represented by data values.

Usage
Character encoding assigns a value of binary numbers to a text character, while decoding derives the text character from a set, based on the value provided.

The ASCII-coded character set used single-byte (8-bit) values and was used in early personal computers. This was superseded by Unicode, which could be encoded as for smaller 8-bit character sets, or as  to support larger 16-bit character sets needed by Asian languages and emojis.

The is the complete set of all characters available in the character set.