What is Apache HTTP Server?
Development of Apache began in early 1995. It was originally based on the NCSA HTTPd server. Development of Apache started after work on the NCSA code stalled. Apache played a key role in the initial growth of the World Wide Web, quickly overtaking NCSA HTTPd as the dominant HTTP server, and has remained most popular since April 1996. In 2009, it became the first web server software to serve more than 100 million websites.
As of June 2013, Apache was estimated to serve 54.2% of all active websites and 53.3% of the top servers across all domains.
Apache is developed and maintained by an open community of developers with guidance from the Apache Software Foundation.
Apache is easy to install. Most Linux distributions supply a package. It is most commonly used on a Unix-like system (usually GNU/Linux), the software is available for a wide variety of operating systems, besides Unix and GNU+Linux, including eComStation, Microsoft Windows, NetWare, OpenVMS, OS/2, and TPF. Released under the Apache License, Apache is free and open-source software.