AIX is a series of proprietary Unix operating systems developed and sold by IBM for several of its computer platforms.
IBM RS/6000 AIX file servers used for IBM.com in the 1990s
AIX Version 4 console login prompt
AIX RS/6000 servers running IBM.com in early 1998
AIX RS/6000 servers running IBM.com in early 1998
Unix is a family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, whose development started in 1969 at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.
Ken Thompson and Dennis Ritchie, principal developers of Research Unix
Photo from USENIX 1984, including Dennis Ritchie (center)
Promotional license plate by Digital Equipment Corporation, actual license plate is used by Jon Hall
HP 9000 workstation running HP-UX, a certified Unix operating system