Minor nitpick: "As you may know, HTML as we know it was originally based on a pre-Internet language called SGML." It's "pre-world-wide-web". The internet was a

Minor nitpick: "As you may know, HTML as we know it was originally based on a pre-Internet language called SGML." It's "pre-world-wide-web". The internet was already alive and quite busy in the 80s.