In Pictures: A retrospective of Google’s Android m...
New versions of the OS followed hard on the heels of the rush triggered by the Moto Droid generation. To combat the already growing problem of version fragmentation – the wide range of devices in the Android ecosystem ran various versions of the software – Google began the Nexus program with the HTC Nexus One, which released in 2010. The idea was to provide a phone that would be kept up-to-date with the latest version of Android.
In Pictures: A retrospective of Google’s Android mobile platform