Chromium OS is an open-source project that aims to build an operating system that provides a fast, simple, and more secure computing experience for people who spend most of their time on the web. Here you can review the project's design docs, obtain the source code, and contribute.
Chrome Operating System, developed by Google in 2009, it is an open-source, Linux based OS that will run on both x86 and ARM based systems. This Operating System is utilized based on the Chrome browser and will be initially targeted at low-powered netbooks, with support for higher end systems coming later.
Google Chrome Operating System is good, only if you have internet connection else it bad because all the stuff's are online based
Google Chrome Operating System Download