- <ulink url="http://www.debian.org/">Debian GNU/Linux</ulink>,
- <ulink url="http://www.redhat.com/">Redhat Linux</ulink>,
- <ulink url="http://www.gentoo.org/">Gentoo Linux</ulink>,
- <ulink url="http://www.suse.com/">SuSE Linux</ulink>,
- <ulink url="http://www.freebsd.org/">FreeBSD (i386)</ulink>,
- <ulink url="http://www.apple.com/macosx/">MAC OSX</ulink>,
- <ulink url="http://www.sun.com/software/solaris/">SunOS 5.8
+ <ulink url="&url.debian;">Debian GNU/Linux</ulink>,
+ <ulink url="&url.redhat;">Redhat Linux</ulink>,
+ <ulink url="&url.gentoo;">Gentoo Linux</ulink>,
+ <ulink url="&url.suse;">SuSE Linux</ulink>,
+ <ulink url="&url.freebsd;">FreeBSD (i386)</ulink>,
+ <ulink url="&url.macosx;">MAC OSX</ulink>,
+ <ulink url="&url.solaris;">SunOS 5.9