An error 404 is just a geeky way of saying that the web site or page that you're looking for does not exist.

Read more about Error 404 on Wikipedia.

And here is a list of some cool Error 404 pages to keep you entertained.

PS. Here's a special welcome if you arrived here via http://thelink.is/404. (I never can resist a good recursion.)

The Error 404 article by Aral Balkan, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial 2.0 UK: England License.