The inventor of the USB originally designed it to be plugged in either way up. One of the most frustrating things to do with technology has got to be the fact that, try as hard as you will; whenever you go to plug a USB in, it’s the wrong way up. The original design would have been much better but ended up being canned as it would have cost twice the price to make it flippable. The inventor of the USB has since agreed that they made the mistake of not going ahead with the original idea.