A pneumatic tube is a system that transports items through a network of tubes using air pressure. It consists of a series of tubes, a sending station, and a receiving station. When an item is placed in a capsule and sent through the tube, air pressure pushes it along the pathway to its destination. These systems are commonly used in places like hospitals and banks to quickly move documents, medications, or cash. The efficiency of pneumatic tubes helps reduce wait times and streamline operations, making them a valuable tool in various industries, including healthcare and finance.