What is Android?

Android is an operating system for mobile devices such as smartphones and tablet computers. Android is a software bunch comprising not only operating system but also middle ware and key applications
Operating system have developed a lot in last 15 years. Starting from black and white phones to recent smart phones or mini computers, mobile OS has come far away. Especially for smart phones, Mobile OS has greatly evolved from Palm OS in 1996 to Windows pocket PC in 2000 then to Blackberry OS and Android.

List of Android Version-

1.5 Cupcake, release date-04/2009
1.6 Donut,release date-09/2009
2.0/2.1 Eclair,release date-10/2009, 01/2010
2.2 Froyo,release date-05/2010
2.3 Gingerbread,release date-12/2010
3.0, 3.1, 3.2 Honeycomb,release date-02/2011, 05/2011, 07/2011
4.0 Ice Cream Sandwich,release date-10/2011