The version history of the Android mobile operating system began with the release of the Android alpha 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 (OHA), and it has seen a number of updates to its base operating system since the initial release.
Versions 1.0 and 1.1 were not released under specific code names, but since April 2009’s Android 1.5 “Cupcake”, Android versions have had confectionery-themed code names. Each is in alphabetical order, with the most recent being Android 7.0 “Nougat”, released in August 2016.
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Since 2008, Android has seen numerous updates which have incrementally improved the operating system, adding new features and fixing bugs in previous releases. Each major release is named in alphabetical order after a dessert or sugary treat; for example, version 1.5 “Cupcake” was followed by 1.6 “Donut”. In 2010, Google launched its Nexus series of devices – a line of smartphones and tablets running the Android operating system, and built by manufacturing partners.
HTC collaborated with Google to release the first Nexus smartphone, the Nexus One. Google has since updated the series with newer devices, such as the Nexus 5 phone (made by LG) and the Nexus 7 tablet (made by Asus). Google releases the Nexus phones and tablets to act as their flagship Android devices, demonstrating Android’s latest software and hardware features.
Google Nexus 6P was developed by Huawei
From 2013 until 2015, Google offered several Google Play Edition devices over Google Play. While not carrying the Google Nexus branding, these were Google-customized Android phones and tablets that also ran the latest version of Android, free from manufacturer or carrier modifications.