A string of 8 bits.
Typically, one byte equals one character of text but in some cases (especially with non-Latin alphabets), two or more bytes are used. Because of this, an SMS written in Cyrillic or Chinese alphabets has shorter maximum length than one written in the Latin alphabet.
Definition: a form of address, usually to a [Hockey boy] or [puckslut] attractor, used especially when the name of the one being addressed is not known.