Apache

A free open-source HTTP (Web) server introduced in 1995 by the Apache Group as an extension to, and improvement of, the National Center for Supercomputing Applications’ earlier HTTPd (version 1.3). Apache is popular on UNIX-based systems, including Linux, and also runs on Windows NT and other operating systems, such as BeOS. Because the server was based on existing code with a series of patches, it became known as “A Patchy server,” which led to the official name Apache. Apache is available from the Apache Software Foundation at www.apache.org

Sources:

⠀ Microsoft Computer Dictionary.--5th ed Edition Microsoft Press 2002 – 648 c. – 29