Android Basic

Android is an operating system for mobile devices such as smartphones and tablet computers. It is developed by the Open Handset Alliance led by Google. It's is built on a Linux foundation. Google purchased the initial developer of the software, Android Inc., in 2005. The unveiling of the Android distribution on November 5, 2007 was announced with the founding of the Open Handset Alliance, a consortium of 84 hardware, software, and telecommunication companies devoted to advancing open standards for mobile devices

Versions of Android
1.5 Cupcake
1.6 Donut
2.0 Eclair
2.2 Froyo
2.3 Gingerbread
3.0 Honeycomb
4.0 Sandwich
4.4 Kitkat