Apache server is often referred as a public domain open source web server, developed by a loosely-knit group of developers. It is the world's most popular web server software with a user base of more than half of the active website and top servers across different industry verticals. The first version of Apache, was developed in 1995 and the name is a tribute to the Native American Apache Indian group. Core development of this web server is performed by a team of about 20 volunteer programmers. However, as the source code is available free of cost, anyone can adapt the server to work on the specific need. There is a large public library of Apache add-ons, similar to the LINUX, which is also an open source operating system platform.
The genuine version of the Apache server was written for UNIX, but there are some versions that run under Windows, Linux, and Macintosh operating systems. Apache can host both static as well as dynamic websites that are programmed on server- side scripting languages, like PHP, Python, or Perl. Support for other programming languages is implemented through installation packages, modules, which are integrated to the standard Apache installation.