As promised for today, Valve has released its custom operating system,SteamOS.

SteamOS is a custom version of the Linux operating system, so if you're looking to tinker around with it be sure to give this FAQ a gander first. Valve is alsosending out Steam Machines to 300 beta participants starting today.

SteamOS is part of Valve's three-pronged approach in bringing PC gaming into the living. In addition to SteamOS, there are also Steam Machines - custom affordable pre-built PCs designed to play Steam games - and Valve's customizable Steam Controller.

http://www.joystiq.com/2013/12/13/st...-for-download/