Android

Androidis a Linux-based operating system designed primarily for touchscreen mobile devices such as smartphones and tablet computers.
The first Android-powered phone was sold in October 2008

                                            Android Versions

Cupcake:

Right from the start, Android is an open OS that can run almost any app or widget so you can do what you want to do

• Android 1.5

Donut:

The world's information is at your fingertips - search the web, get driving directions...or watch videos 

• Android 1.6

Eclair:

Make your home screen just how you want it. Arrange apps and widgets across multiple screens and in folders. Stunning live wallpapers respond to your touch. 

• Android 2.0
• Android 2.1

Froyo: (short for "frozen yogurt")

Voice Typing lets you input text, and Voice Actions let you control your phone, just by speaking. 

• Android 2.2

Gingerbread:

New sensors make Android great for gaming - so you can touch, tap, tilt, and play away. 

• Android 2.3

Honeycomb:

Optimized for tablets, this release opens up new horizons wherever you are.

• Android 3.0
• Android 3.1
• Android 3.2

Ice Cream Sandwich:

Android comes of age with a new, refined design. Simple, beautiful and beyond smart. 

• Android 4.0

Jelly Bean:

Android is fast and smooth with buttery graphics. With Google Now, you get just the right information at the right time.

And with more than 1 million apps on Google Play, and thousands of Android devices, you've got the freedom to do what you want on any device you choose. 

• Android 4.1
• Android 4.2
• Android 4.3

KitKat:
With Android KitKat to make an amazing Android experience available for everybody. 

•  Android 4.4