Dave Raggett is a W3C Fellow from JustSystems and has been a member of the W3C Team since 1995. He is currently driving W3C’s proposals for work on ubiquitous web applications which seeks to reduce the cost of building distributed applications of network appliances in the home, office and on the move, through web technologies such as markup and event-based scripting. He has been closely involved with the development of standards for HTML, HTTP, MathML, XForms, and VoiceXML. His previous position was as W3C Activity Lead for multimodal interaction. Dr. Raggett is also known for his work on open source software including HTML Tidy for cleaning up HTML and Slidy a web-based solution for slide presentations.