Two Operating Systems on my PS3? Following the installation of Yellow Dog Linux on your PS3, there will be 2 operating systems: the GameOS and Yellow Dog Linux (YDL). The GameOS is the operating system that ships pre-installed on PS3. It is also referred to as a hypervisor, an operating system that provides a channel of communication between the outside world (you, your game controller, the monitor) and the built-in hardware (CPU, motherboard, RAM, hard drive, and I/O ports). When you use the on-screen menus, play a game, watch a movie, or listen to music, you are doing so through the GameOS. Yellow Dog Linux runs on top of the GameOS which provides an important communication between Linux and the hardware. Even if this sounds a bit technical, it is important as the GameOS provides a layer of continuity for Linux, making the development and maintenance of Linux for PS3 a more predictable process. This means you will enjoy a higher quality, higher performance Linux operating system.