Android is a mobile operating system based on a modified version of the Linux kernel and other open source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. https://www.acte.in/android-training-in-chennai. Android is developed by a consortium of developers known as the Open Handset Alliance and commercially sponsored by Google.https://www.acte.in/android-online-training. It was unveiled in November 2007, with the first commercial Android device launched in September 2008.