MOUSE :- Mouse is also an input device.

                              

They are different types of mouse available

1.      Two button

2.      Three button

3.      Scroll button

PROCESSOR :- A processor is the logic circuitry that responds to and processes the basic instructions that drive a computer.

                                        

They are two types processors available

1.      Slot processor

2.     Chip processor

MOTHERBOARD :-  The motherboard is a printed circuit that is the foundation of a computer and allows the cpu, ram and all other computer hardware components to function with each other