Your computer's operating system (OS) manages all of the software and hardware on the computer. Most of the time, there are several different computer programs running at the same time, and they all need to access your computer's central processing unit (CPU), memory, and storage. I would say about Android which is an operating system for mobile devices. The top mobile app developers have got a good approch in this to create good Apps. It is mostly used for Smartphones, like Google's own Google Nexus, as well as by other phone manufacturers like HTC and Samsung. It has also been used for tablets such as the Motorola Xoom and Amazon Kindle Fire. Android's kernel is based on Linux.