noun
peripheral device; peripheral equipment
Computing term for external devices connected to a computer, such as printers, keyboards, and mice.
新しい周辺装置をパソコンに接続した。
I connected a new peripheral device to my PC.
Synonym also meaning peripheral device; 周辺機器 is slightly more common in everyday contexts, while 周辺装置 may appear in more technical or formal specifications.
Compound of 周辺 (periphery) + 装置 (device, equipment).