The document contains information about market share of mobile operating systems from 2010 to 2011. It shows that Android increased its market share from 25.3% in 2010 to 52.5% in 2011, while Symbian and RIM decreased. The document also provides a brief history of communication technologies from early speech and symbols to modern wireless networks and smartphones. It outlines the evolution of visual, audio, and electrical communication signals over time.