This is the Monitor , 
Our work we can see. 
                  This is the Mouse , 
It doesn’t eat cheese. 
                   This is the Keyboard , 
with numbers and letters on the Keys . 
                 These are the Headphones , 
be careful please. 
                     This is the C.P.U. , 
its brains we will use today. 
             Put all these parts together, 
get ready it is time to Play.
                    plz mark it best
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a computer consists of a cpu , monitor , keyboard ,and  mouse .

the cpu controls all the functions of the computer.

the mouse to used to point things on the screen of the monitor.

the monitor displays all our writings.the keyboard consists of letters  and numbers.

we use them to write in a computer.

all these together constitutes the computer system.