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The document is a presentation by Brian Fling about designing and developing for mobile devices like the iPhone. It discusses the history of mobile technology from "brick" phones to modern touchscreen smartphones. It covers the various layers of the mobile ecosystem, including networks, operators, platforms, operating systems, and handsets. It also provides overviews of different mobile technologies and development platforms. The goal is to help designers and developers understand the mobile landscape and how to create sites and applications for it.





































































































































































































































































































































































































































