An octet is a unit of digital information in computing and telecommunications that consists of eight bits.

Definitions A variable length sequence of octets, as in Abstract Syntax Notation One (ASN.1),is referred to as an octet string.

In computing, a nibble (often nybble or even nyble to match the vowels of byte) is a four bit aggregation, or half an octet.

The nine states (nonet) made out of a pair can be decomposed into the trivial representation, 1 (called the singlet), and the adjoint representation, 8 (called the octet).

Although main group elements of the second period and beyond usually react by gaining, losing, or sharing electrons until they have achieved a valence shell electron configuration with a full octet of (8) electrons, other elements obey different rules.