Apache

The Apache HTTP Server, commonly referred to as Apache (pronounced /əˈpætʃiː/), is web server software notable for playing a key role in the initial growth of the World Wide Web.^[2] In 2009 it became the first web server software to surpass the 100 million web site milestone.^[3] Apache was the first viable alternative to the Netscape Communications Corporation web server (currently known as Oracle iPlanet Web Server), and has since evolved to rival other Unix-based web servers in terms of functionality and performance. The majority of web servers using Apache run a Unix-like operating system.^{[citation needed]}