1) Google Chrome OS is an open source operating system designed by Google to run exclusively on web applications using specifically designed hardware based on Linux.
2) Key features include ultra-fast boot times of less than 7 seconds, relying on cloud storage rather than local storage, and a simplified interface focused on web applications.
3) The architecture has three main components - the Chromium-based browser and window manager, system level software and services, and firmware. It is designed for netbooks and tablets with an interface optimized for web use.