IBM RS/6000 workstations Feb 1990 - 2002 Run IBM's own AIX Unix operating system
"RS" stands for RISC System "RISC" stands for Reduced Instruction Set Computer-based

The RS line performed better than IBM's existing AS/400 family of midrange computers
Many CPU's were used across 100+ models but all based on IBM Power microprocessors
This example below is a RS6000 43P type 7043-26-10459 with a 604e 200 MHz CPU
RS nerds you have hit the mother lode
Awesome links below, thanks guys

IBM
M.Kraemer - Kevin Bowling - Ardent Tool of Capitalism - fsck tech
AIX ON x86 using QEMU - AIX Public Domain - AIX on Archive.org
Another QEMU install of AIX - From Russia with Love - More Love from Russia
Some Mirror stuff - Unix Guide not just AIX - AIX Pocket guide
Archive of rootvg.net - Archive of pimpworks.org - Archive of aixtools.net