This is the doc of operation system of computer.

1. ASSIGNMENT
“Information technology
 Define android operating system? How does
android operating system works? Also briefly
describe android operating system version?

2. OPERATION SYSTEM
WHAT IS ANDROID OPERATION?
 Android is a Linux-based operating system for
mobile devices such as smartphones and tablet
computers.
 Android specially developed for applications
 There are more than 4,00,000 apps in Android
market
 The Android is an open source.

3.  How does the Android operating system
work?
Android is based on the Linux kernel long-term
support branch. Its user interface is based on direct-
manipulation, meaning it was designed for
touchscreen devices, responding to swiping, tapping,
pinching, and reverse pinching as well as having a
virtual keyboard. These functions operate under the
use of internal hardware such as accelerometers,
gyroscopes and proximity sensors. Android software
is mainly used for mobile phones and tablets, but can
also be used for TVs and digital cameras, although
obviously not every app written for an Android
smartphone will transition over to a TV or camera.
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4. Versions of android
 Android also support Java applications.
 Android 1.0 23 September 2008
 Android 1.1 9 February 2009
 Android 1.5 (Cupcake) 30 April 2009

5.  Android 1.6 (Donut) 15 September
2009
 Android 2.0 (Éclair) 26 October 2009
 Android 2.2 (Froyo) 20 May 2010
 Android 2.3 (Gingerbread) 6 December
2010
 Android 3.0 (Honeycomb) 10 May 2011
 Android 4.0 (Ice cream sandwich) 19 October 2011
Android 4.1 (Jelly Bean) 13 July 2012
 Android 4.4 (Kitkat) 03 September

6.  ANDROD CUPCAKE 1.5
Released on April 30, 2009.
o Added auto-rotationoption.
Copy and Paste feature added in the web
browser.
 ANDROID DONUT 1.6
Increased speed and performance but not upto
required level.
Released on September 15, 2009.
Voice search and Search box were
added.
ANDROID ÉCLAIR 2.2/2.1
Faster OS boot times and fast web browsing
experience.
Released on October 26, 2009.
Bluetooth 2.1 support.

7. Improved typing speed on virtual
keyboard, with smarter dictionary.
ANDROID FROYO
2.2
Released on May 20, 2010.
Support for Adobe Flash 10.1
Improved Application launcher
with better browser No
internet calling.
ANDROID GINGERBREAD 2.3
Released on December 6, 2010.
Updated User Interface with high
o efficiency and speed
New keyboard for faster word input.
o More successful version of Android than previous.
ANDROID HONEYCOMB 3.0

8. Released on February 22, 2011.
 Support for multi-core processors
 Ability to encrypt all user data.
This version of android is only available for
tablets.
ANDROID ICECREAM SANDWICH(ICS)4.0
Released on November 14, 2011.
Virtual button in the UI.
A new typeface family for the UI, Roboto.
Ability to shut down apps that are using data
in the background.
ANDRIOD JELLYBEAN 4.1
Released on June 27, 2012.
Improved the features of previous version
while improving the graphics quality.
Smoother user interface.

9. Android JellyBean 4.2,4.3
 Released on 13 November 2012
 Lock screen improvements
 Multiple user accounts (tablets only)
 Bug fixes and performance enhancements
Android Kitkat 4.4
 Released on 31 October 2013
 Ability for applications to trigger
translucency
 in the navigation and status bars
 Wireless printing capability
 And even more features are currently
being rolled out
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