The heading tags (<H1> to <H6>) were there (and implemented, unlike the <HPX> "highlighted phrase" tags from tbl's list) from the beginning as well. So were <DL

The heading tags (<H1> to <H6>) were there (and implemented, unlike the <HPX> "highlighted phrase" tags from tbl's list) from the beginning as well. So were <DL>, <DT> and <DD>, along with <UL> and <LI> for lists that weren't glossary terms. We also had <PLAINTEXT> and <LISTING> precursors to <pre>, <tt> (may it rest in peace) and <code>. (I couldn't tell you what they looked like in a graphical browser as I was using Lynx on DOS boxes as the time - HTML was handy even without HTTP on our parallel-port-and-telephone-wire network.) There were other tags that didn't last very long, too, like the <ADDRESS> tag for the author's meatspace address (makes sense for scientific collaboration, not so much for, say, political discussion boards).