Android

was Andy Rubin Mobile company, became name for GPhone framework

Initially developed by Android Inc., which Google bought in 2005, Android was unveiled in 2007, along with the founding of the Open Handset Alliance – a consortium of hardware, software, and telecommunication companies devoted to advancing open standards for mobile devices. Beginning with the first commercial Android device in September 2008, the operating system has gone through multiple major releases... The first commercially available smartphone running Android was the HTC Dream, also known as T-Mobile G1, announced on September 23, 2008.

want more open/private? see GuardianProject

Versions (and mkt shares as of May'2013) http://en.wikipedia.org/wiki/Android_(operating_system)#Usage_share_of_Android_versions (current list without shares)

• 4.2.x Jelly Bean November 13, 2012 17 2.3%
• 4.1.x Jelly Bean July 9, 2012 16 26.1%
• 4.0.x Ice Cream Sandwich December 16, 2011 15 27.5%
• 3.2 Honeycomb July 15, 2011 13 0.1%
• 3.1 Honeycomb May 10, 2011 12
• 2.3.3–2.3.7 Gingerbread February 9, 2011 10 38.4%
• 2.3–2.3.2 Gingerbread December 6, 2010 9 0.1%