Way to go Apache! Apache leads the web servers with the largest market share by far, with almost 70% of servers using Apache. Microsofts IIS takes second place with a measly 20%, which is interesting, seeing as though most people running XP have their web server IIS turned on by default. So that percentage is very generous. The other web servers such as NCSA and Sun make up the ramaing 10%, according to Netcraft.
Check out the image below: