"Really? I was just at the mail the other day, and I didn't see one iPad being used as a cash register." the comment above you also talks about 'tablets', not

"Really? I was just at the mail the other day, and I didn't see one iPad being used as a cash register." the comment above you also talks about 'tablets', not 'ipads'. Tablet-style things (ie rather small devices with a touch screen) have been used for cash registers and as controls in the industry for quite some time. A lot of them were merely PC's, running some sort of Windows. This might start changing now since tablets are getting more widespread, hardware getting cheaper etc.