英文：Peripherals are real devices, such as graphics cards or disks controlled by controller chips on the system board or on cards plugged into it.
中文：外設是一些物理設備，比如說圖象卡或者磁盤，它們受控于位于主闆或者主闆上插槽中的控制芯片。
英文：A LAN is a system of computers and associated peripherals such as Printers that are physically connected by cable within a limited geographical area-typically in an office building or on a college campus.
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