Earlier today I was reading a blog post about rare HTML tags. The post was titled 10 Rare HTML Tags You Really Should Know. I was not familiar with Nettuts+, but based on this blog post and some of their social numbers they seem to be a pretty big player. They have over 100,000 RSS subscribers, over 53,000 Twitter followers, and nearly 40,000 Facebook fans.
Anyway, as I was reading through the post I saw a few tags that I hadn’t heard of that I now want to use. My favorite was the < acronym > tag. They said, "The < acronym > tag is a way to define or further explain a group of words. When you hover over text that has the < acronym > tag used, a box appears below with the text from the title tag." Let’s see what this looks like:
Twitter is a popular social network allowing you to communicate 140 characters at a time.
In the example I used an < acronym > tag around the word Twitter. When you hover over Twitter you should see, "Founded in 2006", similar to the example used on the Nettuts+ blog post.
Other tags discussed were the < address > tag, the < label > tag, and the < wbr > tag. I had never heard of that one, but apparently it allows you to specify a place where you think a line break might be useful, but only if needed. Now sure when I would use that, but found it interesting nonetheless.
If you use HTML, try playing around with some of these obscure tags. I would love to see examples of these. Send them my way if you come across them out there on the World Wide Web.
Source: http://net.tutsplus.com/articles/web-roundups/10-rare-html-tags-you-really-should-know/