This has been answered too many times in too many threads. It was a simple typo on IRC and it escalated into a WORLDWIDE PHENOMENON to confuse everyone.
only nerds have that in theyre sig....its like that movement in xfire to kill WoW...it failed miserably
Are you trying to subtly imply that you are in some way more superior and less nerdy than the regulars at this site simply because you don't have three letters in a sequence in your signature?
If so, my oh my, you have a lot of learning to do.