Source : Free On-Line Dictionary of Computing

A/UX
     
         (Apple's UniX) {Apple}'s first version of
        {Unix} for {Macintosh} computers.  A/UX merges the {Macintosh
        Finder} ({GUI}) with a Unix core, offering functions from both
        systems.  It will run on some late-model {Motorola 68000}
        Macs, but not on the {Power Macintosh}.
     
        A/UX is based on {AT&T} Unix {System V}.2.2 with numerous
        extensions from V.3, V.4 and {BSD} 4.2/4.3.  It also provides
        full {POSIX} compliance.
     
        A/UX 3.x.x incorporates {System 7} for the Macintosh, thus
        supporting the vast majority of Macintosh {applications}.
        System 7 and Unix are fully integrated under A/UX 3.x.x with
        the Unix file system being seen as a disk drive by the Finder.
     
        {jagubox's A/UX Home Page
        (http://jagubox.gsfc.nasa.gov/aux/Info/FAQ.auxl)}.
     
        (1997-12-13)