<P> The version history of the Android mobile operating system began with the public release of the Android beta in November 5, 2007 . The first commercial version, Android 1.0, was released in September 2008 . Android is continually developed by Google and the Open Handset Alliance, and it has seen a number of updates to its base operating system since the initial release . </P> <P> Versions 1.0 and 1.1 were not released under specific code names . Android code names are confectionery - themed and have been in alphabetical order since 2009's Android 1.5 Cupcake, with the most recent major version being Android 8.0 Oreo, released in August 2017 . </P> <Table> <Tr> <Th> Code name </Th> <Th> Version number </Th> <Th> Initial release date </Th> <Th> API level </Th> <Th> Security patches </Th> </Tr> <Tr> <Td> (No codename) </Td> <Td> 1.0 </Td> <Td> September 23, 2008 </Td> <Td> </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> (Internally known as "Petit Four") </Td> <Td> 1.1 </Td> <Td> February 9, 2009 </Td> <Td> </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Cupcake </Td> <Td> 1.5 </Td> <Td> April 27, 2009 </Td> <Td> </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Donut </Td> <Td> 1.6 </Td> <Td> September 15, 2009 </Td> <Td> </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Eclair </Td> <Td> 2.0--2.1 </Td> <Td> October 26, 2009 </Td> <Td> 5--7 </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Froyo </Td> <Td> 2.2--2.2. 3 </Td> <Td> May 20, 2010 </Td> <Td> 8 </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Gingerbread </Td> <Td> 2.3--2.3. 7 </Td> <Td> December 6, 2010 </Td> <Td> 9--10 </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Honeycomb </Td> <Td> 3.0--3.2. 6 </Td> <Td> February 22, 2011 </Td> <Td> 11--13 </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Ice Cream Sandwich </Td> <Td> 4.0--4.0. 4 </Td> <Td> October 18, 2011 </Td> <Td> 14--15 </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> Jelly Bean </Td> <Td> 4.1--4.3. 1 </Td> <Td> July 9, 2012 </Td> <Td> 16--18 </Td> <Td> Unsupported </Td> </Tr> <Tr> <Td> KitKat </Td> <Td> 4.4--4.4. 4 </Td> <Td> October 31, 2013 </Td> <Td> 19--20 </Td> <Td> Supported; See clarification </Td> </Tr> <Tr> <Td> Lollipop </Td> <Td> 5.0--5.1. 1 </Td> <Td> November 12, 2014 </Td> <Td> 21--22 </Td> <Td> Supported </Td> </Tr> <Tr> <Td> Marshmallow </Td> <Td> 6.0--6.0. 1 </Td> <Td> October 5, 2015 </Td> <Td> 23 </Td> <Td> Supported </Td> </Tr> <Tr> <Td> Nougat </Td> <Td> 7.0--7.1. 2 </Td> <Td> August 22, 2016 </Td> <Td> 24--25 </Td> <Td> Supported </Td> </Tr> <Tr> <Td> Oreo </Td> <Td> 8.0 </Td> <Td> August 21, 2017 </Td> <Td> 26 </Td> <Td> Supported </Td> </Tr> </Table>

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