1. Database Management Systems
    1. Microsoft SQL Server
    2. MySQL
  2. Operting Systems
    1. Linux
      1. Debian
      2. Fedora
      3. Red Hat
      4. Slackware
      5. SUSE
      6. Ubuntu
    2. Macintosh OS 10.0 – 10.6
    3. Windows
      1. Windows 7
      2. Windows Server 2008
      3. Windows Vista
      4. Windows Server 2003
      5. Windows XP
      6. Windows 2000
      7. Windows 98
      8. Windows NT 4.0
      9. Windows 95
      10. Windows 3
    4. Cisco IOS
  3. Web Servers
    1. Apache
    2. IIS