Steam Machine, also known as Steam Box during development, is a line of pre-built gaming computers designed to operate to minimum specifications set by Valve Corporation to run its Linux-based operating system SteamOS and numerous games within the Steam client. Several computer hardware vendors have engaged with Valve to develop their own versions of Steam Machines to offer to retail, offering additional options atop Valve's requirements such as dual-booting options with Microsoft Windows, and the ability to upgrade the computer in the future.