Google Chrome OS
Google Chrome OS is a Linux-based operating system designed by Google that uses the Google Chrome web browser as its principal user interface, so it works primarily with web applications. It also has an integrated media player and file manager, it supports Chrome Apps and Android applications. Google Chrome OS shares the same code base with Chromium OS , the open source equivalent project used primarily by developers, but has some additional firmware features, including verified boot and easy recovery. Moreover, unlike Chromium OS, Chrome OS is automatically updated to the latest version. As a consumer, the only way you will get Google Chrome OS is by buying a Chromebook that has the operating system installed by the OEM.
