A/UX

AIX
AIX (comp.unix.aix @emory.edu)
AIX (comp.unix.aix @univ-mrs.fr)
AIX 3.2.x
AIX 411
AIX & RS/6000

BSD OS
BSDI Mailing list (Searchable)

DEC Ultrix
DEC OSF/1
DEC Ultrix and DEC OSF/1 AXP
DEC general

DG/UX

FreeBSD

HP/UX
HP-UX 10
HP3000
HPUX-sysadm mailing list (Searchable)

Linux

NetBSD (mac68k)

OSF/1

Minix

SGI
SGI (tamu.edu)
SGI Extreme Tech Center

Solaris
Solaris2
Solaris x86
SPARC64/OS
Sun (Comp.sys.sun.admin)
SunService Tip sheets

Topix

UNICOS

UNIX

UNIX-to-NT

UnixWare

UnixWare (Novell)

UTS

Xenix