This is the official guide to building native JavaScript applications for Palm's new mobile operating system, Palm webOS Written by Palm's chief technology officer along with the Palm webOS development team, Palm webOS offers you a complete tutorial on the design principles, architecture, UI, tools, and services necessary to develop webOS applications. You'll quickly pick up the basics by following along chapter by chapter as an actual application is built, using the Mojo JavaScript framework and Palm's SDK . Palm webOS is designed to support a fast and beautiful user experience built on top of established web development standards. If you're familiar with HTML, CSS, and Javascript, you're ready to build applications for webOS-based devices, including the Palm Pre.