Today, in many applications there is a need to know and use HTML. And if you are a Web applications programmer you probably should know HTML :).

The question is do you know all the HTML tags? Do you know exactly how they work and what each tag does? And the most important of all, how each tag acts in each browser?

There are hundreds of books, articles, WebSites, posts, blogs and manuals that claim to "teach" you HTML. I on the other hand think that there is no experience like hands on experience so I wanted to introduce you to HTML Playground . This is one of my favorites sites for HTML.