This document discusses using web technologies like HTML, CSS, and JavaScript to build native mobile applications for iPhone and Android. It introduces the Appcelerator Titanium platform, which allows developers to create fully native mobile apps using web skills and standards while having full access to device APIs. Titanium compiles code written with HTML, CSS, JavaScript into native mobile applications that can be deployed to app stores. It provides APIs for common mobile tasks like camera, video, gestures, accelerometer and more.