Apache HTTP Server

The Apache HTTP Server, commonly referred to simply as Apache, is a web server notable for playing a key role in the initial growth of the World Wide Web. Apache was the first viable alternative to the Netscape Communications Corporation web server (currently known as Sun Java System Web Server), and has since evolved to rival other Unix-based web servers in terms of functionality and performance. The project's name was chosen for two reasons: out of respect for the Native American Indian tribe of Apache, well-known for their endurance and their skills in warfare, and due to the project's roots as a set of patches to the codebase of NCSA HTTPd 1.3 - making it a patchy server. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation. The application is available for a wide variety of operating systems, including Unix, FreeBSD, Linux, Solaris, Novell NetWare, Mac OS X, and Microsoft Windows. Released under the Apache License, Apache is characterized as free software and open source software. Since April 1996 Apache has been the most popular HTTP server on the World Wide Web; since March 2006 however it has experienced a steady decline of its market share, lost mostly against Microsoft Internet Information Services and the .NET platform used by some large blog providers. As of December 2007 Apache served 49.57% of all websites.