64-bit vs 32-bit

http://www.apple.com/pr/library/2013/09/10Apple-Announces-iPhone-5s-The-Most-Forward-Thinking-Smartphone-in-the-World.html

http://en.wikipedia.org/wiki/64-bit_computing,
http://arstechnica.com/apple/2013/09/apple-unveils-64-bit-iphone-5s,
http://appleinsider.com/articles/13/09/10/apple-announces-iphone-5s-with-64-bit-a7-cpu-new-gold-option,
http://news.cnet.com/8301-13579_3-57602274-37/iphone-5s-a7-chip-is-first-64-bit-processor-for-smartphones,
http://www.phonearena.com/news/Apple-iPhone-5S-has-arrived-first-64-bit-chip-in-a-phone-and-fingerprint-sensor-included_id47281,
http://venturebeat.com/2013/09/10/apples-new-iphone-5s-the-worlds-first-64-bit-mobile-phone,
http://www.zdnet.com/the-iphone-5s-goes-64-bit-will-it-matter-7000020497

http://www.pcworld.com/article/207851/32vx64.html

http://www.techsupportalert.com/content/32-bit-and-64-bit-explained.htm

http://www.zdnet.com/the-iphone-5s-goes-64-bit-will-it-matter-7000020497

http://blog.tune-up.com/windows-insights/32-bit-vs-64-bit-more-bit-more-performance

http://lifehacker.com/5431284/the-lifehacker-guide-to-64+bit-vs-32+bit-operating-systems

http://windows.microsoft.com/en-ca/windows-vista/32-bit-and-64-bit-windows-frequently-asked-questions