A device driver is a computer program that operates or controls a particular type of device that is attached to a computer. There are many drivers for many applications. A driver communicates with the device through the computer bus or communications subsystem to which the hardware connects. When a calling program invokes a routine in the driver, the driver issues commands to the device. You can handle a computing machine or a computer by using drivers all softwares includes a driver to handle it. For Example you can use wi-fi driver to controll your network connection on your PC or Laptops. there are given below all drivers.