Apache currently has over 60% of the market share and is the most used web server.
The Apache web server.
The apache http server
The Apache Foundation is most widely known for their Hypertext Transfer Protocol server.
Apache is the world's leading and most commonly deployed web server. The majority of the web sites on the Internet run on an Apache server,
Apache Web Server is the most popular web server software on the internet. It is available for all major operating systems, and supports most application frameworks (except for .ASP).
httpd.conf is probably the most important. It holds every setting of the Apache Server. One typo in this file can send your server into a self-destructive spiral of doom. I'm not sure about the others, hope this helped. Fireblazer
"According to consumer voting, the best premium application server is IBM WebSphere. The most efficient open source application server is Apache Geronimo."
HTML code is interpreted by a WWW server. Most popular are Apache, IIS and nginx.
Defining them in the Server Explorer's Variables tab is the most common way to create an application level server variable.
There are really to many to accurately list Generally Linux is deployed for most dedicated servers and host and array of different things the most common of which is LAMP (Linux Apache MYSQL PHP) which is the Linux based Web Server package
The most popular web server on the Internet is Apache, with approximate 46% of the total market share. The second most popular is IIS, with 22% of the market share. You can view monthly statistics on web server market share at the related link below.
Apache HTTP ServerApache HTTP Server (also referred to as simply "Apache") has, at the time of writing, been the most popular web server on the web since 1996. Apache is developed and maintained by the Apache Software Foundation, which consists of a decentralized team of developers. The software is produced under the Apache licence, which makes it free and open source. Apache is available for a range of operating systems, including Unix, Linux, Novell Netware, Windows, Mac OS X, Solaris, and FreeBSD.Apache HTTP Server website: http://httpd.apache.orgMicrosoft Internet Information Services (IIS)IIS is, at the time of writing, the second most popular web server on the web. It is however, gaining market share, and if the current trend continues, it won't be long before it overtakes Apache. IIS comes as an optional component of most Windows operating systems. You can install IIS by usingAdd/Remove Windows Components from Add or Remove Programs in the Control Panel.Microsoft IIS website: http://www.microsoft.com/iisSun Java System Web ServerBased on the Sun One Web Server, the Sun Java System Web Server is designed for medium to large business applications. Sun Java System Web Server is available for most operating systems. Sun Java System Web Server website:http://www.sun.com/software/products/web_srvr/home_web_srvr.xml