IRIX 6.5.22 © 2003 Silicon Graphics, Inc.
Released in November 2003.
As announced in a customer letter around August 2003 this release will be the last to support some of the older machines. This includes Challenge, Indigo, Indigo 2, Indy, Power Challenge, Power Indigo 2, Power Onyx, Onyx.
Also, IRIX 6.5.22 is the last version of IRIX 6.5 available in maintenance and feature stream versions.
Soft's Media.