On Thu, 2010-06-10 at 23:07 +0800, Ed Greshko wrote: > I'm sorry. Could you explain to me what is a "floppy disk"? OT, but many years ago (before everyone had their own computer) I was talking to some students after my Operating Systems class and had the following exchange with one of them: Student: Prof, these floppies are square, right? Me (cautiously): Yes ... Student: But they go round and round! I was tempted to explain that in fact the head moves very quickly in a square pattern, but I took pity on her :-) poc