If you want to understand about the device drivers then it can be said that as the bus driver rides, monitors, controls, and manages the bus, similarly the device drivers do with computer devices. If you are looking for the writing device drivers in windows or linux then you can do it at your own or help of experts can also be considered for the purpose. In Windows, device driver is represented by the structure that is known as Device-Object. A routine named as Driver Entry is contained by every device driver in Windows. There is no such clear difference between layered modules in Linux.