| I gave it some thought but it's hard to say. For most of the ones I missed and mentioned in sibling threads, I can think of people who'd be aware of them: - Probably <ruby> and related tags are used in Japanese and other spheres with such a language feature - <base> I knew of, I thought archive.org used it but apparently not currently. Probably if you work with archived or otherwise namespaced content, you can reasonably find this a very familiar element - <track> if you're a media person, doesn't seem that outlandish - <dfn> I knew of basically, but just couldn't recall the names for glossary tags - <kbd> is used all the time on Superuser (in Markdown, where HTML is valid though of course they filter most of it) - Some others that I didn't remember, like <template> and <article>, were just stupidity. I know these... This leaves <del> and <ins>. There are enough diffing tools, but it's not as big a category of software people constantly work on, especially since this is only for browsers. I'd not be surprised if these are the most-forgotten elements Or does anyone still use <map>? I saw it in the HTML tutorial (linked from a Dutch magazine) that got me into programming so I know of it and remembered while doing the quiz, but it's fairly far faded from my mind and I'm not sure anyone would ever use it when, if you want this sort of functionality, you'd probably want the versatility of JavaScript |