Web servers
Web server systems are responsible for accepting requests from clients and serving what was requested.
- Apache
Apache is an open source HTTP web server for Unix-like systems (BSD, Linux, and UNIX systems), Microsoft Windows, Novell Netware and other platforms. For quite some time Apache was the only viable open source alternative to the Netscape web server (now Sun Java Web Server). Since April 1996 Apache has been the most popular HTTP server on the Internet: in May 1999 it was running on 57% of all web servers; by July 2005 this percentage had increased to 69%. (Data from Netcraft)
- IIS
IIS (Microsoft Internet Information Services) is a set of Internet-based services for servers using Microsoft Windows. It is the world's second most used web server.
- Sun Java System Web Server
Sun Java System Web Server, formerly known as SunOne, is a Web server designed for medium and large business applications. Available on all major operating systems, the Java System Web Server provides JavaServer Pages (JSP) and Java Servlet technologies, Microsoft Active Server Pages, PHP, and CGI.



