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Alpha 1.0
It was not used in any commercially available device. -
Beta 1.1
It was the first release used in a commercial device -
Cupcake 1.5
It was first utilized by a number of manufacturers -
Donut 1.6
Improved voice search and search experience -
Eclair 2.0 and 2.1
Few devices were released with v2.0, but v2.1 has been quite popular. These releases were both code-named Eclair. -
Froyo 2.2
Numerous enhancements for Microsoft's Exchange were used, such as remote wipe, calendar support, global address lists and improved security -
Gingerbread 2.3
There have been a stream of minor updates and bug fixes to version 2.3 since it's intial release -
Honeycomb 3.0 3.1 3.2
3.0: It is targeted at devices with larger screens.
3.1: USB devices and accessories supported, including mice, keyboards, digital cameras and more.
3.2: Direct application access to SD card file system -
Ice cream sandwich 4.0
It merges the 3.x tab centric design and the v2.x phone based design into a single version. -
Jelly Bean 4.1-4.2-4.3
4.1: Improved touch response and transitions. Improved Voice search
4.2: Beam photos and vidoes.Multiple users for tablets
4.3: Restricted profiles for tablets.4K Resolution support -
Kit Kat 4.4
Just say "Ok Google" to start voice operations.
Printing -
Lollipop 5.0
5.0: Responsive UI with natural lighting and shadows. Android TV -
Lollipop 5.1
Support for multiple SIM cards.
Device protection for lost or stolen device -
Marshmallow 6.0
Improved privacy controls
Easier transition from older devices -
Nougat 7.0 7.1
Nougat introduces notable changes to the operating system and its development platform, including the ability to display multiple apps on-screen at once in a split-screen view. -
Oreo 8.0
it was the first developer preview of Android "O"
