IBM AIX (operating system)

AIX (Advanced Interactive eXecutive) is the name given to a series of proprietary operating systems sold by IBM for several of its computer system platforms, based on UNIX System V while containing BSD extensions ("r" commands such as rlogin, rcp, rexec, etc.). The latest scalable AIX 5L 5.3 release supports up to 64 IBM POWER or PowerPC architecture central processing units and two terabytes (TB) of random access memory. The JFS2 file system - first introduced by IBM as part of AIX - supports computer files and partitions over 16 TB in size (though that's the tested limit and recommended maximum).
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