A Note from the Author of O'Reilly Media about what this book does not - and doesn't - do: Palm WebOS is a new platform and is a very different type from which the operating system runtime used as the basis for the web UI and model application. Palm and O'Reilly felt that it was important to have books available to help developers get a basic understanding of the new Palm platform at the time that SDK was released, this time played a major role in the content and structure of the book. Ideally, this book will be a complete reference of the new platform but it is not possible, because it was written at the same time as the SDK software is being developed by Palm's engineering team. Over time, different needs will be filled by other books, but in the meantime we hope that this book will serve a valuable role to introduce developers to WebOS and give them a way to start with webOS application development. A second printing of this book will update the original scope was replaced by the next Mojo SDK build. For the original owner of the printing of books, all updates are posted on the "View / Submit Errata" link (please see the left column of the web page). Thank you for understanding that the publication of books and scope of technology is moving fast can sometimes be a science of exact, we know there will be a need for books such as Palm WebOS: The Insider's Guide to Developing Applications in JavaScript using the Palm MojoT Framework, and there are definitely some people who better to write that book that Mitch Allen, who said, we understand that because it is a new operating system and SDK, there will be (and will continue to) change that at best can not be documented and explored until a new printing of the books are released . Written by chief software technology officer with the Palm Oil Palm development team webOS, WebOS provides a complete tutorial about the principles of design, architecture, UI, tools, and services needed to develop a WebOS application framework JavaScript-including Mojo and Palm's SDK. Getting the whole picture WebOS platform and architecture Understand important concepts for the design of application: what separates webOS from other web and mobile platforms Learn the details of Mojo and SDK development tool to build and test best practices of mobile application Check, an important consideration, and guiding principles to grow with the WebOS and framework Mojo