Linked by Eugenia Loli on Wed 2nd Oct 2002 17:49 UTC
SGI and IRIX In the '90s, before MacOSX was released, if people were to reffer to a user-friendly Unix that looked cool at the time, that would have been SGI's 64-bit operating system for the MIPS processors, the IRIX. IRIX was first released in 1987, and by 1995 was already a highly respected UNIX, the first with immense multimedia capabilities! Check out our introduction and some screenshots of IRIX.
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Irix is SysV, not BSD
by Richard on Wed 2nd Oct 2002 23:28 UTC

For the Unix side of things, IRIX is based on BSD 4.4 (do not confuse this root of all BSDs in the '80s with today's FreeBSD 4.x)...

Irix was originally based on BSD, but circa Irix 4.05 (around 1990, I think) became System V, much as the BSD SunOS became SysV Solaris. In each case, there are some BSD compatibility libraries, but on the whole, it's plain SysV.