Android Inc. founded in Palo Alto, california ,united states in October 2003 by Andy Rubin,rich miner, nick sears and Chris white to develop.

In 17th August 2005, Google acquired android Incorporation. Since then, it is in the subsidiary of Google Incorporation.


It is a open source software platform and operating system for
mobile devices and based on the Linux kernel. Android was developed by Google and the Open Handset Alliance (OHA), a coalition of hardware, software and telecommunications companies.

The open handset alliance (OHA) is a business alliance of firm to develop open standard for mobile devices. Devoted to advancing open standards for mobile devices. Develop technologies that will significantly lower the cost of developing and distributing mobile devices and services.

Android has its own virtual machine i.e. Dalvik Virtual Machine (DVM), which is used for executing the android application. Android allows writing managed code in Java language but now in Kotlin also.

Different Android versions, released date and their name :

Android version 1.0 (Alpha) released on September 23, 2008.
Android version 1.1 (Beta) released on February 9, 2009.
Android version 1.5 (Cupcake) released on April 27,2009.
Android version 1.6 (Donut) released on September 15, 2009.
Android version 2.0 released (Eclair) on October 29, 2009.
Android version 2.1 released on January 12, 2010.
Android version 2.2 (Froyo) released on May 20, 2010.
Android version 2.3 (Gingerbread) released on December 6, 2010.
Android version 3.0 (Honeycomb) released on February 22, 2011.
Android version 3.1 released on May 10, 2011.
Android version 3.2 released on July 15, 2011.
Android version 4.0 (Ice Cream Sandwich) released on October 8, 2011.
Android version 4.1 (Jelly Bean) released on July 9, 2012.
Android version 4.2 released on November 13, 2012.
Android version 4.3 released on July 24, 2013.
Android version 4.4 (KitKat) released on October 31, 2013.
Android version 5.0 (Lollipop) released on November 3, 2014.
Android version 6.0 (Marshmallow) released on October 5, 2015.
Android version 7.0 (Nougat) released on August 22, 2016.
Android version 8.0 (Oreo) released on August 21, 2017.
Android version 9.0 (Pie) released on  August 6, 2018.

Android Architecture :

Android software stack is split into Four Layers :
# The Application Layer
# The Applicaation Framework
# The Libraries and Runtime
# The Kernal

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 and many more

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