USB inventor regrets making them so difficult to plug in correctly. While plugging a mouse, a phone, or a thumb drive into your computer, you try to stick the USB into its slot, only to find it stopping prematurely. You flip it around, but it still won't go in. So you flip it back to the original position and it slides in without a hitch. We've all been there, and the inventor of the USB sees our pain. Ajay Bhatt, the leader behind the IBM team that gave us the USB in the mid-'90s, revealed in an interview that he is well aware of the annoyances the public has with USB, or Universal Serial Bus, but there's a reason it's designed the way it is."The biggest annoyance is reversibility," Bhatt said. He's got that right.