= R =
[Unix] 1. The superuser account (with user
name `root') that ignores permission bits, user number 0 on a
Unix system. The term avatar is also used. 2. The top node
of the system directory structure; historically the home directory
of the root user, but probably named after the root of an
(inverted) tree. 3. By extension, the privileged
system-maintenance login on any OS. See root mode, go root, see also wheel.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.