Mouse
A computer mouse is an input device that is most often used with a personal computer
Monitor
A monitor or a display is an electronic visual display for computers. The monitor comprises the display device,circuitry and an enclosure.
Speaker
1. Computer speakers, or multimedia speakers, are speakers external to a computer, that disable the lower fidelity built-in speaker. They often have a low-power internal amplifier.
CPU
The CPU is the primary component of a computer that processes instructions.
Keyboard keyboard is a typewriter-style device, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches.