Chrome OS is a proprietary operating system made by Google. It is mostly used on laptops known as Chromebooks. Android is not proprietary, the OS and it's source code can be found online for free. Many Android editions exist, some made by Google some made by others like Samsung or online communities.
Chrome OS (sometimes styled as chromeOS) is a Gentoo Linux–based operating system designed by Google It is derived from the free software Chromium OS and uses the Google Chrome web browser as its principal user interface However, Chrome OS is proprietary software Google announced the project in July 2009, conceiving it as an operating system in which both applications and user data reside in the cloud: hence Chrome OS primarily runs web applications Source code and a public demo came that November The first Chrome OS laptop, known as a Chromebook, arrived in May 2011 Initial Chromebook shipments from Samsung and Acer occurred in July 2011