Questions about Android devices are off-topic for Super User and should be asked on android.stackexchange.com unless they specifically involve interaction with a computer. Questions about Android app development should be asked on stackoverflow.com. For non-coding/development questions about the Android Studio software, use the [android-studio] tag instead.
Android is an operating system for smartphones, tablet computers, and other mobile devices. Primarily developed and distributed by Google, Android is an open source operating system based on a modified version of the Linux kernel.
Operating system for mobile devices. Developed by Google and the Open Handset Alliance.
Android page on Wikipedia
Detailed information about the Android OS.
General information about the Android OS.
Google I/O developer conference
Contains detailed videos and slides by Android product engineers