Steven Pemberton is a researcher at the CWI, The Centre for Mathematics and Computer Science, a nationally-funded research centre based in Amsterdam, which was the first non-military Internet site in Europe. Steven's research is in interaction, and how the underlying software architecture can support the user. In the 80's he helped design the programming language ABC (which Python is based on) and this led to designing a system that if you saw it now you would call a browser. As a result Steven became involved with the World Wide Web from the beginning, organising two workshops at the first Web Conference in 1994, and chairing several early W3C workshops. He was a member of the CSS Working Group from its start, and was a long-time member and chair of the HTML Working Group. He is co-author of (amongst other things) HTML 4, CSS, XHTML, RDFa, XForms, and XML Events.