What makes 'cos' unique?

Note: the category and title are both clues and you may need to use some twisted logic as the answer is not straightforward

I would still think it's what makes 'c,' 'o,' and 's' unique, not necessarily 'cos.' Unless you want to say that 'cos' is the only abbreviated math term made up of letters without any straight segments..

Posted by DJ on 2003-09-22 23:44:31