IBM AIX for RS/6000 Version 3

Manufacturer	IBM
OS	AIX for RS/6000 Version 3
Product Code	5756-030
Available	1990/06/01 - 1997/01/31
Description	AIX version 3 is a unix-like operating system by IBM for its RS/6000 line of workstations and servers. With features such as a logical volume manager, a journaled filesystem, HA-NFS (high-availability NFS using dual attached SCSI disks), filesystem ACLs, realtime facilities and a preemtable kernel, "modern" package and fix management, an optimizing C compiler (yes, in the base system. These were the times), an audit facility, and last but not least, a menu-driven system administration program ("smit"), it was (IMHO) way ahead of its time. Of course it featured all the common "distinguishing" unix facilities as well, including POSIX, X/OPEN XPG3, AT&T SVID, and 4.3BSD compatibility, virtual memory, TCP/IP, NFS, NIS, X11, and NLS support. It comes at a price, though. AIX is different. System administration outside of smit does not at all feel unix-like, and porting open source software to AIX can be a considerable challenge.
Marketing	AIX Version 3 for RS/6000 is a multi-tasking, demand-paged, virtual memory operating system which can operate as a single-user or multi-user system. It is derived from the AIX/RT Version 2.2.1 Operating System, which has been restructured and enhanced to support and exploit the POWER Architecture of the IBM RS/6000 hardware, and to conform to the IEEE 1003.1-1988 standard for a Portable Operating System for Computer Environments (POSIX). The AIX/RT Operating System Version 2.2.1 kernel and AIX/RT Virtual Resource Manager (VRM) Version 2.2.1 have been merged into a single unified kernel to simplify the support of advanced function and the addition of device drivers, as well as to extend real-time capabilities to the full AIX process management environment. Also included is the optimizing C compiler and a basic set of application development tools. IBM Network File System and Network Computing System support is included to enhance distributed processing capabilities.