userland n.
Anywhere outside the kernel. "That code belongs in userland."
This term has been in common use among Linux kernel hackers since at leat 1997, and
seems to have originated in that community.
Node:USG Unix, Next:UTSL, Previous:userland, Up:=
U =
USG Unix /U-S-G yoo'niks/ n.,obs.
Refers to AT&T Unix commercial versions after Version 7, especially System III and
System V releases 1, 2, and 3. So called because during most of
the lifespan of those versions AT&T's support crew was called
the `Unix Support Group', but it is applied to version that pre-
and post-dated the USG group but were of the same lineage. This
term is now historical. See BSD, Unix.