The book covers how to use HTML5 in order to serve the needs of people with disabilities and older persons using assistive technology (AT). It takes several approaches, including a look at the new semantics of HTML5 and how to combine its use with authoring practices you know from using earlier versions of HTML. It also demonstrates how HTML5 content is currently supported (or not) by assistive technologies such as screen readers, and what this means practically for accessibility in your web projects.