Self-checkout machines

The same system Apple Store employees use to run credit card transactions on iPhones or iPod Touches is about to spread. Apple is offering it to other retailers, a move that could create a multifaceted win for Apple's enterprise business.

Do you ever use the self-checkout at your local store? And when you do, are you one of those fumblers who has to get a cashier to help? Or are you the annoying guy right behind, tapping his foot and sighing loudly? A new study has found the fear of looking stupid stops people from using...