Android Mobile Operating System

Android 2.3 gingerbread
Android 2.3 'Gingerbread'
Android was developed by a small startup company that was purchased by Google Inc in 2005., and Google continues to update the software. Android is an open source, Linux-derived platform backed by Google, along with major hardware and software developers (such as Intel, HTC, ARM, Samsung, Motorola and eBay, to name a few), that form the Open Handset Alliance.

Android also has a large community of developers writing application programs ("apps") that extend the functionality of the devices. There are currently over 200,000 apps available for Android.

The Android operating system software stack consists of Java applications running on a Java-based, object-oriented application framework on top of Java core libraries running on a Dalvik virtual machine featuring JIT compilation. Libraries written in C include the surface manager, OpenCore media framework, SQLite relational database management system, OpenGL ES 2.0 3D graphics API, WebKit layout engine, SGL graphics engine, SSL, and Bionic libc. The Android operating system consists of 12 million lines of code including 3 million lines of XML, 2.8 million lines of C, 2.1 million lines of Java, and 1.75 million lines of C++.
Android was released on November 5th 2007

More information about Android Mobile Operating System can be found in Wikipedia through this link: click here

android phones
Right picture :
The Android Emulator default home screen (v1.5).

Left picture:
Early Android device.