Built on the Linux kernel, Debian GNU/Linux is an open-source and free operating system (OS) that is based on a graphical user interface (GUI). It incorporates GNU project tools and capabilities and is packaged with thousands of software applications for easy installation and execution.
Released in 1993 by the Debian Project, Debian is a Linux distribution that evolved from the Unix OS. It may be used as a desktop, server or embedded OS and supports a number of processor frameworks, including Intel, AMD and ARM.
Default Debian installation packages are bundled with utility/development tools, communications/email software, networking services and other applications designed for desktops and servers.
As of February 2011, the most current version is Debian 6.0, also known as Squeeze.