The IBM AIX (Advanced Interactive executive) is based on UNIX System V, which has 4.3BSD compatible with extensions.
AIX is developed and still active by IBM. AIX is the very first operating system to develop journaling file system. IBM constantly improved the software with some features like disk, processor, and network virtualization, hardware resource allocation with fractional processor units and consistency engineering ported from its mainframe designs. It has been supported by IBM Power System with IBM i and Linux.
AIX is an exposed operating system from IBM that is founded on a version of UNIX. AIX was designed for IBM's System/390 or large server hardware platform. AIX-6000 is an operating system that works on IBM's terminal platform, the RISC System/6000.