A system comprises of the monitor,keyboard,mouse,cpu and all other components of the computer which is required to perfom a task

Types of output
Softcopy :are what can be edited on the monitor
Hardcopy:what can not be edited which has been already printed out .

Computer hardware includes the physical parts of a computer, such as the central processing unit (CPU), random access memory (RAM), motherboard, computer data storage, graphics card, sound card, and computer case. It includes external devices such as a monitor, mouse, keyboard, and speakers.