Google Chrome OS
Google Chrome is an operating system designed to achieve one primary task – to get you from clicking your power button to turn the computer on and to the web as quickly as possible.
Google states 3 main objectives with the Chrome OS design: speed, simplicity and security.
Here’s a great video that lays out the fundamentals of Google Chrome, and you can then watch an actual computer boot up Chrome – this takes place at the 3:06 mark: