The self-service check-out position showing the laser barcode scanner (just in front of the employee's face), the main point-of-sale application window (appears to be 20-inch LCD....iMac?), a smaller receipt signing window (just like the device used now), the steel signing pen retained by a wire in an indentation, and a slot for swiping your credit/debit card (to the far right). Note the white Apple keyboard set into a metal shelf that can be pulled out of the wall.