- Android is a Linux-based operating system developed by Google in conjunction with the Open Handset Alliance. It includes an operating system, middleware and key applications.
- The version history of the Android operating system began with the release of the Android Beta in November 2007. Major versions include 1.0, 1.1, 1.5 Cupcake, 1.6 Donut, 2.0/2.1 Eclair, 2.2 Froyo, 2.3 Gingerbread, 3.0 Honeycomb, 4.0/4.1 Ice Cream Sandwich, and 4.4 KitKat.