Us ethis tag only if Android system is an important part of the question for a user experience design. If your question is written from an *Android user*'s point-of-view, you'll probably get a good answer on the [Android Stack Exchange](http://android.stackexchange.com/).

A mobile operating system, developed by Open Handset Alliance (OHA) which is led by Google, notable for its use on a wide variety of tablets and smartphones and its status as a leading competitor to the Apple iPhone, RIM's Blackberry and Microsoft's Windows Phone 7.