Plug and play
（重定向自Plug n play）
![IBM 402 Accounting Machine control panel wiring. This control panel was labeled](/Images/godic/202502/03/IBM402plugboard.Shrigley.wireside4805.jpg")
![An example of an ISA interface card with extremely limited interrupt selection options, a common problem on PC ISA interfaces.Kouwell KW-524J dual serial, dual parallel port, 8-bit ISA, manufactured in 1992:* Serial 1: IRQ 3/4/9* Serial 2: IRQ 3/4/9* Parallel 1: IRQ 5/7* Parallel 2: IRQ 5/7(There is no technical limitation that 3,4,5,7,9 could not all be selectable choices for each port.)](/Images/godic/202502/03/Kouwell_KW-524J_-_8-bit_PC_ISA_interface_card_-_4_port_-_2_serial_-_2_parallel4806.jpg")
In computing, a plug and play device or computer bus, is one with a specification that facilitates the discovery of a hardware component in a system without the need for physical device configuration or user intervention in resolving resource conflicts.