This document provides an overview of the Android operating system, including its history, versions, advantages, and disadvantages. It describes how Android was founded in 2003 and was later acquired by Google. It discusses the formation of the Open Handset Alliance and the release of early Android versions from 2008 to 2011. It then lists and summarizes the key features of each major Android version from 1.5 Cupcake to 6.0 Marshmallow. Finally, it outlines some of Android's advantages as being cost-effective and allowing multitasking, while also noting disadvantages like potential security issues and effect on battery life.

2. Contents
1 What is Android?
2 Android Story
3 Open Handset Alliance
4 Android Version History
5 List of Android Versions
6 Advantages & Disadvantages
7 Conclusion

4. • A software platform and
operating system for mobile
devices.
• It is not only operating system
but also a key application and
middleware.

5. Android Inc was founded in Palo Alto,
California,United States by Andy
Rubin,Rich Miner,Nick Sears & Chris White
Google acquired Android Inc
The Open Handset Alliance(OHA), a
consortium of several companies was formed
Android beta SDK released
- Oct 2003
-Aug2005
-5thNov2007
-12thNov2007

6. • Devoted to advancing open standards for mobile devices.
• Develop technologies that will significantly lower the cost of
developing and distributing mobile devices and services.

7. Since April 2009
it’s version has been developed under a codename
based on dessert or sweet treats.
They are in alphabetical order:-
Cupcake
Donut
Éclair
Froyo(frozen yogurt)
Gingerbread
Honeycomb
Ice Cream Sandwich
Jelly Bean(4.1 released on 9th July 2012)

9. Based on Linux kernel
2.6.27,the official 1.5 (cupcake)
was released on 30th April 2009.
A new soft-keyboard with text-
prediction.
Ability to record & watch
videos through camcorder mode.
Directly upload videos to
youtube and pictures to Picasa.
Android1.5
(cupcake)

10. Based on Linux kernel 2.6.29
the 1.6 (donut) was released on
15th Sept 2009.
Support for WVGA(Wide Video
Graphics Array) screen resolution.
Updated CDMA(Code Division
Multiple Access) support.
Quick search box & voice
search.
Android1.6
(donut)

11. Based on Linux kernel 2.6.29
the 2.0(Éclair) SDK was released
on 26th Oct 2009.
Support for more screen sizes &
resolution & also better contrast
ratio for background.
Improved google maps 3.1.2.
Built in flash support for camera.
Android 2.0
(Éclair)

12. Based on the Linux kernel
2.6.32 on the 20th May 2010, the
Android 2.2(Froyo) SDK was
released.
General android OS speed,
memory and performance
optimizations.
Wifi hotspot functionality.
Android 2.2
(Froyo)

13. Based on the Linux kernel
2.6.35 on 6th Dec 2010, the
2.3(Gingerbread) SDK was
released.
Focus on game development.
Download manager for long-
running downloads.
Redesigned multi-touch s/w
keyboard.
Android 2.3
(Gingerbread)

14. Based on the Linux kernel
2.6.36 the 3.0 (Honeycomb)
SDK was released for tablets on
22nd Feb 2011.
First TABLET is designed
with Honeycomb Android
version.
Support for multi-core
processor.
Android 3.0
(Honeycomb)

15. Amazing features
Font System: It is specially designed
for high resolution screen & brings a
magazine like a feel the whole interface.
Screenshots: Finally Android will
allow to take screenshots without
rooting the smart phone or installing
any third party application Just hold
down volume key & power button to
capture screenshots.
Instant Voice: It will not take long to
transcribe your words Just speak it & it
instantly transforms it into text.
Android 4.0
(Ice-cream
Sandwich)

16. Brought out on 9th July 2012
With great features along with it.
Android 4.1
( Jelly Bean)
Not yet devices are produced in
larger aspect it will be up to December
of 2012.

17. Android 5.0 provides a
faster, smoother and
more powerful
computing experience.
Release on Nov,3
2014.
It is supported with
4G(LTE).
This platform support
for 64-bit architectures.
Android 5.0
(Lollipop)

18. Android 6.0
"Marshmallow” is a
version of the Android
mobile operating
system is released in
October 2015.
It support
for fingerprint
recognition.
Android 6.0
(Marshmallow)

19. 6.1Advantages:
1 Cost Effective-
The first thing about Android is its cost.But with the low
price now they can go for Android phones with good design and lot
of applications which is not possible with the Apple,Blackberry and
some.
2 Multitasking-
Android has a multitasking option so you can run many
applications simultaneously.
3 Easy Access of Store-
So the store is in the home screen which is easy to access
the applications.

20. 6.2 Disadvantage:
1 Security-
Making source code available to everyone indirectly invites
the attention of black hat hackers.
2 Battery Life-
A disadvantage of open-source development is that anyone
can scrutinize the source code to find vulnerabilities & write exploits.
3 Virus Applications-
Few Android Applications contain virus also present in
the AndroidMarket.Due the lack of Quality Standard many
applications contain viruses which makes your mobile hung.

21. Android is truly open, free development
platform based on Linux and open source.
Handset makers can use & customize the
platform without paying a royalty.
Android is open to all: industry, developers and
users.
Participating in many of the successful open source
projects.
Aims to be as easy to build for as the web.
Google Android is stepping into the next level of
Mobile Internet.