Most people born before 1950 can remember visiting or working in shops that had cash carriers - cash balls that ran on wooden rails, wire systems where the carrier was catapulted along an overhead steel wire, or pneumatic tube systems where the carrier was whisked off to the cash office. In the first half of the twentieth century there were thousands of these systems in shops throughout the British Isles, the United States, Canada, Australia, South Africa, China and elsewhere, and though few now remain in action several have been preserved in museums, often in working order. Those who have fond memories of these intricate bygones will find in Cash Carriers in Shops a wealth of information, and in its illustrations a feast of nostalgia.