1. International Telecommunication Union (ITU). The world in 2011 ICT facts and figures. Geneva, 2011. (22/02/20112) http://www.itu.int/ITU-D/ict/facts/2011/material/ICTFactsFigures2011.pdf
2. Telsyte. Ten million more Australians to use smartphones by 2015. 2011 (21/02/20112) http://www.telsyte.com.au/?p=1140
3. Apple iTune. 25 billion app count down. 2012 (21/02/20112) http://www.apple.com/itunes/25-billion-app-countdown/
4. Pope S . Apple's App Store Downloads Top 15 Billion. Apple Press Info; 2011(21/02/20112) http://www.apple.com/pr/library/2011/07/07Apples-App-Store-Downloads-Top-15-Billion.html
5. The Official google blog. 10 Billion Android Market downloads and counting. 2011 (22/02/2012) http://googleblog.blogspot.com.au/2011/12/10-billion-android-market-downloads-and.html