I have yet to see a good identification of what APACHE could be ... suggestions many & good ideas all ... but no “aha” moment like transpires with other such things.
It is an open source software package for one...
One meaning for Apache:
In an April 2000 interview, Brian Behlendorf, one of the creators of Apache said “...we’re building a server out of a bunch of software patches, right? So it’s a patchy Web server ... It just sort of connotated: ‘Take no prisoners. Be kind of aggressive and kick some ass.’”
Because the source code is freely available, anyone can adapt the server for specific needs, such as IP address-based geolocation, name and IP address-based virtual servers, user and session tracking, and real-time status views, among other technical things that are meaningless to me.
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.