How to Use HTML in WebTV Email: Features step by step lessons on how to add HTML tags in the signature box. Includes a practice pad and some browser friendly tools

HTML 4.01 Specification: HTML specifications set by the W3C

HTML Goodies Tutorials: A group of lessons set up to be covered over a week's time, one tutorial per day

W3C HTML Home Page: Full information on HTML and links to all the specifications

W3C Markup Validation Service: World Wide Web Consortium validator, maintained at W3C by W3C staff and collaborators. Checks the markup validity of Web documents in HTML, XHTML, SMIL and MathML