Tooltips

Hello everybody!

I'm making a little study about tooltips as graphic interface elements.

I have searched a lot, but I havent found anything interesting on the Internet.

I wonder:

- Who invented them?
- Which application first impplemented them?
- Are them a good interface elements?
- Your opinion? ;)

P.S. Great list!

--
Ana Belen Ramon Castillo // avidos web factory

inc. http://www.avidos.net
blog. http://www.avidos.net/blogold
css. http://www.ovillo.org