- Routers (Cisco) and firewalls

- Linux (RedHat, Mandrake, Debian)

- FreeBSD, NETBSD, OpenBSD, BSDI

- AIX, True64

- HP UNIX

- SGI IRIX

- SCO UNIX.

- Solaris, SUNOS.

- MS bugs

- Summary advisories

- Exploits

- CGI scripts bugs

- Patches

- Network-level applications

- User-level applications