Android

Android is a Linux-based operating system designed primarily for touch-screen mobile devices such as smartphones and tablet computers. Android is open source and Google releases the code under the Apache License. This open-source code and permissive licensing allows the software to be freely modified and distributed by device manufacturers, wireless carriers and enthusiast developers. Additionally, Android has a large community of developers writing applications ("apps") that extend the functionality of devices, written primarily in a customized version of the Java programming language. A developer survey conducted in April–May 2013 found that Android is the most popular platform for developers, used by 76% of the mobile developer population. Each is in alphabetical order, with the most recent major version being Android 7.0 Nougat, released in August 2016 and the most recent major version being Android 10, released in September 2019.

Code name	Version number	Initial release date	API level
Petit Four	1.1	9-Feb-09	2
Cupcake	1.5	27-Apr-09	3
Donut	1.6	15-Sep-09	4
Eclair	2.0 – 2.1	26-Oct-09	5 – 7
Froyo	2.2 – 2.2.3	20-May-10	8
Gingerbread	2.3 – 2.3.7	6-Dec-10	9 – 10
Honeycomb	3.0 – 3.2.6	22-Feb-11	11 – 13
Ice Cream Sandwich	4.0 – 4.0.4	18-Oct-11	14 – 15
Jelly Bean	4.1 – 4.3.1	9-Jul-12	16 – 18
KitKat	4.4 – 4.4.4	31-Oct-13	19 – 20
Lollipop	5.0 – 5.1.1	12-Nov-14	21 – 22
Marshmallow	6.0 – 6.0.1	5-Oct-15	23
Nougat	7.0 – 7.1.2	22-Aug-16	24 – 25
Oreo	8.0 – 8.1	21-Aug-17	26 – 27
Pie	9	06-Aug-18	28
Android 10	10	03-Sep-19	29