Unix 论坛
http://www.unix.com
开放工作组: Unix 工作组
http://www.unix.org
Unix Power
http://www.unixpower.org
Berkeley 软件套件(BSD)
http://www.bsd.org
FreeBSD
http://www.freebsd.org
NetBSD
http://www.netbsd.org
PC-BSD
http://www.pcbsd.org
DragonFlyBSD
http://www.dragonflybsd.org
OpenBSD
http://www.openbsd.org
TrustedBSD
http://www.trustedbsd.org
Minix
http://www.minix3.org
Linux 基金会
http://www.linuxfoundation.org
OpenSUSE
Apple Mac OS X
http://www.apple.com/macosx/
IBM AIX
http://www.ibm.com/aix/
Sun Solaris
http://www.sun.com/software/solaris/
SCO OpenServer
http://www.sco.com/products/openserver6/