<P> Computer hardware are the physical parts or components of a computer, such as the central processing unit, monitor, keyboard, computer data storage, graphic card, sound card and motherboard . By contrast, software is instructions that can be stored and ran by hardware . </P> <P> Hardware is directed by the software to execute any command or instruction . A combination of hardware and software forms a usable computing system . </P>

The physical components of the computer system are called