nibble

192px|thumb|right|An Octet (computing)|octet [[code page 866 font table ordered by nibbles.]]

In computing, a nibble, also spelled nybble to match byte, is a unit of information that consists of four bits. A nibble is half of a byte, or octet. The unit is alternatively called nyble, nybl, half-byte or tetrade. In networking or telecommunications, the unit is often called a semi-octet, quadbit, or quartet.