Android is a software stack for mobile devices developed and promoted by Google that includes an operating system, middleware and key applications.
It features an application framework enabling reuse and replacement of components, a Dalvik virtual machine optimized for mobile devices, optimized graphics powered by a custom 2D graphics library; 3D graphics based on the OpenGL ES 1.0 specification (hardware acceleration optional), media support for common audio, video, and still image formats (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, GIF) and few other things like Bluetooth, EDGE, 3G, and WiFi (hardware dependent) and camera, GPS, compass, and accelerometer (hardware dependent)
