Linux was originally developed as a free operating system for personal computers based on the Intel x86 architecture, but has since been ported to more computer hardware platforms than any other operating system. Thanks to its dominance on smartphones, Android, which is built on top of the Linux kernel, has the largest installed base of all general-purpose operating systems. Linux, in its original form, is also the leading operating system on servers and other big iron systems such as mainframe computers and virtually all fastest supercomputers. As of November 2015, 98.8% of the world's 500 fastest supercomputers run some variant of Linux. Linux distributions are the cornerstone of the LAMP server-software combination (Linux, Apache, MariaDB/MySQL, Perl/PHP/Python) which has achieved popularity among developers, and which is one of the more common platforms for website hosting. Linux servers are frequently selected over other server operating systems for their stability, security and flexibility advantages. Leading Linux server operating systems include RedHAT, CentOS, Debian, Ubuntu Server, Slackware and Gentoo. Linux also runs on embedded systems, which are devices whose operating system is typically built into the firmware and is highly tailored to the system; this includes smartphones and tablet computers running Android and other Linux derivatives. A Linux server is a high-powered variant of the Linux open source operating system that's designed to handle the more demanding needs of business applications. At Rooman we offer the Training to Install and manage the Linux servers such as network and system administration, database management and Web services Maintenance.