What is a device driver
=========================

A device driver (often referred to as driver’) is a piece of software that controls a particular type of device which is connected to the computer system

A device driver has three sides:
	one side talks to the rest of the kernel
	one talks to the hardware, 
	and one talks to the user

	==================
	=		 =
	=   User	 =  ---------
	= 		 =	    |
	==================          |
		|                   |
		|                   |
		|                   |
	==================          |
	=		 =          |
	=   Kernel	 =          |
	= 		 =          |  Via Device File
	==================          |
		|                   |
		|Device Driver 
		|                   |
	==================          |
	=		 =          |
	=   Hardware	 = ---------
	= 		 =
	==================