Does anyone remember those old department stores with wires going every which way above your heads, connected to a thing like a wooden screw top jar. The shop assistant put the hand-written bill and your money into it, pulled a spring loaded handle, and it went wheeeeee ... whizz.... and clanged into the cashiers booth, high up in the ceiling of the shop. She then unscrewed the jar, stamped the bill, put the change in, and whizzed it back to the assistant ! The high-light of one of our shopping trips, aged about 9, was once being allowed to pull the handle and set the thing going ! Beats digital tills (which always run out of till roll as I get to the front of the queue), credit cards (which are out of date) and pin numbers (forgotten) any day !