octet

noun

1. A group or set of eight of something.
2. A group of eight musicians performing together.

   “An octet of waiters sang her "Happy Birthday".”

3. A composition for such a group of musicians.
4. A byte of eight bits. Abbreviation: o
5. (rare)A group of three bits, representing any of eight possible values.

   “This is done by breaking down each set of permissions (user, group, and other) to represent an octet.”