The interface commonly used for connecting peripheral devices to computers is the Universal Serial Bus (USB). USB provides a standardized connection that allows devices such as keyboards, mice, and storage drives to communicate with computers. It supports both data transfer and power supply, enabling devices to function efficiently without needing external power sources. Additionally, USB technology has evolved over the years, with variations like USB-C offering faster data transfer speeds and reversible connector designs. As a versatile and widely adopted interface, USB has become essential in modern computing environments.