Date: 28 Apr 2000 11:58:53 PDT

  On pre-6.5 systems, a 'uname -a' will give you the Irix version of
  the currently running kernel. The 6.5.x release added the '-R' flag
  which reports the current revision number (e.g. 6.5.6m). See the
  uname(1) manpage for other options.

  Of more general use, since the running kernel does not always
  reflect installed software, is the versions(1M) command.  'versions'
  with no arguments provides a full listing all the installed software
  components.  'versions -b | grep patch ' provides a brief listing of
  installed patches.  Note that the use of patches is depricated in the
  6.5 release stream.  Software subsystems are now "updated" so in with
  a few exceptions (e.g. systems running legato networker), there should
  be no patches installed.

  IRIX 5.2's System Manager ('chost') has the IRIX version number under
  "IRIX Version" and a listing of installed software under "Software"
  (the "Show Installed" button).