1. W3C Activities HTML: is the lingua franca for publishing on the Web XHTML: an XML application with a clean migration path from HTML 4.01 CSS: Style sheets describe how documents are displayed XSL: consists of three parts: XSLT, XPath, and XSL Formatting Objects.

2. W3C Activities--cont DOM: Document Object Model is a platform and language neutral API to access and update the content, structure, and style of a document SOAP: Simple Object Access Protocol communication protocol to allows programs to communicate via standard Internet HTTP

3. W3C Activities--cont WAI: the Web Accessibility Initiative for people with disabilities MathML: Mathematical Markup Language SMIL: Synchronized Multimedia Integration Language to enable multimedia presentations on the Web SVG: Scalable Vector Graphics language for describing 2D graphics in XML RDF: the Resource Description Framework describing metadata about Web resource--- semantic web.