Android is an open-source software platform and operating system for mobile devices based on the Linux kernel. It was developed by Andy Rubin, Rich Miner, Nick Sears and Chris White at Android Inc., which Google later acquired. Android features include support for wireless communication technologies, multi-tasking applications, and a customizable interface. Some versions of Android include Cupcake, Donut, Éclair, Froyo, Gingerbread, Honeycomb, Ice Cream Sandwich, and Jelly Bean.

2. WHAT IS ANDROID?
 A Software platform and operating
system for mobile.
 Based on the Linux kernel.
 Android was found way back in 2003.
 It was developed in Palo Alto,
California.
 Android was developed by the Andy
Rubin, Rich Miner, Nick Sears and
Chris White.
 Android was purchased by the

3. FEATURES OF
ANDROID
Android is not a single piece of
hardware.
Android supports wireless
communication using:-
 3G Networks
 4G Networks
 802.11 Wi-Fi
Networks
 Bluetooth
Connectivity  Android is a multi-process system, in
which each application (and parts of the
system) runs in its own process.

4.  Other then Android there are several other
mobile operating system which is used.
 Symbian, iOS, windows this are one of the
most used mobile operating systems.

5. ANDROID VERSIONS

6. Android 1.0 (Angel Cake)
The first version of the open source software was released back in 2008
Android 1.1 (Battenberg)
In Feb 2009, version 1.1
Android 1.5 (Cupcake)
Launched in April 2009
Android 1.6 (Donut)-released in sept 2009
Android 2.0 2.1 (Éclair)-released in 26 October 2009
Android 2.2 (Froyo)
released in the summer of 2010
Android 2.3 (Gingerbread)
Gingerbread landed by the end of 2010
Android 3.0 (Honeycomb)
For the first time Google released a software that was totally focused on tablets.
This version, released in 2011
Android 4.0 (Ice Cream Sandwich 4.0) released in 2012
Android 4.1 (jelly bean4.1) released in 2013

7. FEATURES OF
ANDROID
Background Wi-Fi location still runs even
when
Wi-Fi is turned off
Developer logging and analyzing
enhancements
It is optimized for mobile devices.
It enables reuse and replacement of
components.
Java support ,media support, multi touch,
video calling,multi tasking ,voice based
features, screen capture, camera
,bluetooth,gps,compass and
accelerometer,3G

8. LIMITATIONS:-
 Making source code available to
everyone inevitably invites the attention
of hackers.
 Android operating system uses more
amount of battery as compared to normal
mobile phones.
 As there are so many user sometimes it
becomes difficult to connect all the users.
 As we call Android is world of
applications we continuously need to
connected with the internet which is not
possible for all the users.

9.  Android is now stepping up in next level
of mobile internet.
 There are chances of Android Mobile
sales becomes more then iPhone in next
two years.
 Google may launch another version of
android that starts K because Google is
launching all the android versions in the
alphabetical order.
 There are chances of Android may
become the widely used operating system
in world.