"First-come, first-served" is a system where services or resources are provided to individuals in the order they arrive or request them. This means that the first person to show up or ask for something gets it before anyone else. It is commonly used in various settings, such as restaurants, ticket sales, and customer service lines. This approach is straightforward and easy to understand, as it rewards those who act quickly. However, it can lead to long waits for those who arrive later. Many businesses use this method to manage customer flow and ensure fairness in service delivery.