It's not a one-browser web anymore. You need to reach audiences that use cell phones, PDAs, game consoles, or other alternative browsers, as well as users with disabilities. Legal requirements for assistive technologies as well as a wide array of new browsing experiences means you need to concentrate on semantics, alternate access paths, and progressive enhancement. Give your audience the power to interact with your content on their own terms. It's the right thing to do, and with a $100 billion a year market for accessible content, new laws and new technologies, you can't afford to ignore accessibility.With this book, you'll learn basic principles and techniques for developing accessible HTML, audio, video, and multimedia content. In addition, you will understand how to apply the principles you learn in this book to new technologies when they emerge. You'll learn how to: use best practices of accessibility to develop accessible web content; build testing into projects to improve results and reduce costs; create high quality alternative representations for your audience; add accessibility features to external media like PDF and Flash; negotiate the terrain of accessibility standards; and, apply principles of accessibility to new technologies as they emerge.