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Apache (web server)

Apache HTTP Server
Apache HTTP server logo (2016).svg
Original author(s) Robert McCool
Developer(s) Apache Software Foundation
Initial release 1995; 22 years ago (1995)
Stable release 2.4.27 (July 11, 2017; 1 day ago (2017-07-11))
Repository svn.apache.org/repos/asf/httpd/httpd
Development status Active
Written in C,XML
Operating system Unix-like, Windows
Type Web server
License Apache License 2.0
Website httpd.apache.org

Apache HTTP Server, colloquially called Apache (/əˈpæ/ ə-PA-chee), is free and open-source cross-platform web server software, released under the terms of Apache License 2.0. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation.

Apache HTTP Server is cross-platform, meaning that it is built for Unix-like systems (e.g., macOS, Linux and FreeBSD) as well as Windows. However, As of 1 June 2017, 92.26% of all Apache HTTPS Server copies ran on Linux distributions. Version 2.0 improved support for non-Unix, e.g. Windows and OS/2 (and eComStation). Old versions of Apache were ported to run on e.g. OpenVMS, and NetWare.

Originally based on the NCSA HTTPd server, development of Apache began in early 1995 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.


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