Debian GNU/Linux is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux.

Debian GNU/Linux provides more than a pure OS: it comes with over 25000 packages, precompiled software bundled up in a nice format for easy installation on your machine.

The Tango Desktop Project exists to help create a consistent graphical user interface experience for free and Open Source software.

While the look and feel of an application is determined by many individual components, some organization is necessary in order to unify the appearance and structure of individual icon sets used within those components.

The Tango Desktop Project defines an icon style guideline to which artists and designers can adhere. A sample implementation of the style is available as an icon theme based upon a standardized icon naming specification. In addition, the project provides transitional utilities to assist in creating icon themes for existing desktop environments, such as GNOME and KDE.