operating system, standard (POSIX) A set of
IEEE standards
variants. IEEE 1003.1 defines a Unix-like operating system
interface, IEEE 1003.2 defines the
shell and utilities and
["More UNIX For Dummies", ISBN: 1-56884-361-5] says it stands
for "Portable Operating System Interface with an X thrown in
to make it sound cooler."
(1997-12-04)