HP-UX <operating system> The version of {Unix} running on {Hewlett-Packard} {workstations}. HP-UX conforms to {X/Open}'s Portability Guide Issue 4 ({XPG4}), Federal Information Processing Specification (FIPS) 151.1, {POSIX} 1003.1, POSIX 1003.2, {AT&T}'s System V Interface Definition 2 ({SVID} 2). HP-UX incorporates selected features from the University of California at Berkeley Software Distribution 4.3 ({4.3BSD}). It is known by some as "{HP-SUX}". [Features?] (1997-05-12)
HPUX Hewlett Packard / UniX (Unix), "HP/UX"