History & versions of Andriod

• Android is an operating system based on linux kernel and designed primaly for touch screen mobile devices like smartphones and tablets
• first Android phone was HTC Dream

The versions of android are 

1. andriod 1.0(API level 1)
2. android 1.1(API level 1) 
3. android 1.5 cupcake(API level 3)
4. android 1.6 donut(API level 4)
5. android 2.0 Eclair(API level 5,6,7 in the next few versions)
6. android 2.2-2.2.3 Froyo(API level 8)
7. android 2.3-2.3.2 Gingerbread( API level 9,10 in next versions(2.3.2-2.3.7))
8. android 3.0 Honeycomb(API level 11,12(in 3.1 version),13(in 3.2 version))
9. android 3.0 Honeycomb(API level 11,12(in 3.1 version),13(in 3.2 version))
10. android 4.0 Icecream Sandwich(API level 14(till 4.0.2 version),13(in till 4.0.4 version))
11. android 4.1 jellybean(API level 16)
12. android 4.2 jellybean(API level 17)
13. android 4.3 jellybean(API level 18)
14. android 4.4 Kit-kat(API level 19)