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Monitor screen - Monitors, otherwise known as displays or screens, currently come in two formats: they are matte screens and glossy screens. There are may advantages and disadvantages about them.

because matte screens don't get glare or reflections on them and however, the same rough surface (polarizer) that reduces the intensity of reflected light results in less contrast and brightness since the light from the LCD screen has to pass through it , on the other hand type of glossy screens have vibrant colors and high contrast and brightness because they have a smooth, high-gloss surface as a result it is often the choice for movies or gaming.

Mouse- They are different types of mouses. They are divided on wire and wireless . The wireless mouses 

 are getting better and better, so people don't have to worry about issues like slower response time or bad signal however there's no getting around the fact that this still need to recharge the batteries every now and then just as there's no getting around the fact that wired mice are limited by the cable.

Keyboard- there are two different types of keyboards. They are divide on wirelles and wire.  In Wirelles keyborads people dont have to tolerate the mess of wiring and inconvenience. 

Can maintain required distance between the screen and the seating , people dont need to keep it placed on the working table always saving a lot of space when not using the system. 

Scanner - is a device that optically scans images, printed text, handwriting, or an object and converts it to a digital image

Digital camera-  is digital camera, scanners, which are based on the concept of repographics cameras. Due to increasing resolution and new features such as anti-shake, digital cameras have become an attractive alternative to regular scanners

Projector - Projector, overhead projector - an optical device for viewing on the projection screen fixed or moving image. 
The projector comprises a light source and an optical system forming a beam of light. Modern overhead projector, display images using a parallel beam of light as an image carrier,with the beam divergence and placing the object close to the light source, a considerable increase on the screen.

Printers - cooperating with the computer device, used to move the text, the image in various print media type paper, foil, canvas and the like. Some printers can also work without a computer, for example to print photos taken on a digital camera (when connected to a printer or insert a memory card with recorded images into a slot built into the printer)

Input devices –

It is equipment that you can put to your computer and you can use it as input device which might be keyboard , microphone, speakers, mouse, camera and other pieces of computer hardware equipment used to provide data and control signals to an information processing system such as a computer or other information appliance. Input and output devices make up the hardware interface between a computer and a scanner.