A queueing system is a model used to understand how items or people wait in line for service. It typically consists of customers, servers, and the rules governing their interactions. For example, in a bank, customers form a line to be served by tellers. The system helps analyze factors like wait times and service efficiency. Queueing systems are characterized by several components, including arrival rates, service rates, and the number of servers. These systems can be found in various settings, such as restaurants, call centers, and transportation hubs, helping organizations optimize their operations and improve customer satisfaction.