What is the need for device drivers?
The need of Device driver is a program which controls a particular type of device which attached to your system. There are device drivers for printers, displays, CD-ROM readers, diskette drives, and more. When you buy an operating system you find device drivers are incorporated with the product. If after sometime you buy new device for operating system which not anticipate then you will install new device driver which is important to convert input/output instructions to operating system to understand message.