Android is an open-source software platform and operating system for mobile devices. It was developed by the Open Handset Alliance, a consortium of technology companies led by Google. The Android platform includes an operating system, middleware, and key applications. Some key events in Android's history include its founding in 2003, acquisition by Google in 2005, the launch of the Open Handset Alliance in 2007, and the release of the first Android device in 2008. The Android operating system is based on the Linux kernel and has seen many updates to its software through different "dessert named" versions that added new features and support for more devices.