Asdf
Categories: Computer keyboards
Asdf are the first four letters on the home row of a QWERTY or QWERTZ keyboard. They are often used as a sample or test case, or as random, meaningless nonsense. In some cases, this is a default password for a few systems and the password of people who don't take the time to choose a less-guessable password.
'asdf' is used in many dictionary crackers, since there is always the possibility that some user has left their password as 'asdf' by default.
The internet has taken to the idea that many users type in the characters 'asdf' when they're not searching for anything in particular, and just want to fill in a given field. If you run a search through any given search engine, you'll see many websites listed with the keyword 'asdf'. Some forward thinking people have registered 'asdf' domain names. asdf.com is a very popular website that tries to determine the hidden meaning behind the characters, and asdf.org has been around for a while and 'asdf' in their context actually means something.
Asdf, also spelled A5DF, is the name of an underground band from southern Ontario. The name is not an acronym, the band was named after the way the four letters are used with no real meaning or context. They have a band profile on Myspace (http://www.myspace.com/a5df ), but they are so underground that they don't have any recorded songs.