The term "peripheral" refers to something that is situated on the outer edges or margins of a system or area. In technology, it often describes devices that are not part of the core computer system but are connected to it, such as printers, keyboards, and mice. These devices enhance the functionality of the main system without being integral to its operation. In a biological context, "peripheral" can refer to parts of the nervous system outside the brain and spinal cord, known as the peripheral nervous system. This system includes nerves that connect the central nervous system to limbs and organs, playing a crucial role in transmitting signals throughout the body.