Plug and Play has the ability to install equipment with little or no setup. A term used to describe an accessory device that works immediately when connected to a computer, without the need for installation procedures, reconfiguration, or restarting the computer. One common example is a Universal Serial Bus (USB) device.
Plug and Play is a technology that can reduce conflicts between computer devices by automatically configuring them at startup. However, for it to work properly your BIOS and your Operating System both must support PnP, and the device being configured must be a Plug and Play device. The technology actually works pretty good but there can be problems when you mix legacy devices with PnP.