The Linux/Apache combination performs well and is highly customizable. A variety of open source applications are available for developing a Web application in Linux. These include Apache Web server, PHP scripts and the MySQL database. Major organizations using Linux and Apache include Yahoo!, Hotmail and EToys. The Linux/Apache combination is the most popular for Web startup companies. Defects in Unix and the high licensing costs of commercial implementations of the operating system first drove many companies to the open-source Linux, but the commercial operating systems do tend to run on h