I heard about this app from a friend
who happened to be in an Apple store in the states.
He asked one of the salesmen
where to pay for the stuff he got,
cause he didn't see any cashier stations.
The salesman took his iphone out of his pocket
scanned the stuff, got the total and asked for the credit card.
He swiped the credit card and asked my friend to sign
on the iphone with his finger.
Then he emailed him the receipt.
The only thing the salesman had to do
that the iphone can't
was to get my friend a plastic bag.
This application is called Square.
Have a look.
اهل فيلكا ما خلوا شي