The output devices are those devices that give computers the indispensable role of communicating information to the user after being processed by it.

The presentation of the data after being processed, in any of its forms, is carried out by this class of devices that will be much more useful the more they can make the presentation of the work simple and practical.

The output devices, together with the input devices, constitute the group of peripherals that give computers real utility.

At the same time that data processing systems evolved over time, these peripherals were endowed with greater technological advances, reaching today to allow the use of computers to people just a few years old, when, remember, The first computers were designed to be used only by people who knew perfectly the commands and the circuits that were in it.

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  • Input devices

Examples of output devices


In the output devices, there is one par excellence, whose example perfectly synthesizes the history of this class of devices: the monitor. Through a graphics card, the computer and the peripheral are connected, allowing the image of the processing that is being carried out on the computer to be observed on the monitor, and through this image, the user can have a notion of what he is actually doing.

The first monitors emerged in the early ’80s and were monochromatic, only showing texts. The following monitors, CGA and EGA, gradually adapted to the support of colors and graphics, and also increased the pixel resolutions. VGA monitors, created in 1987 by the IBM company, were essential in order to incorporate a quantity of video memory, making the previous models obsolete.

The most recent time in the history of monitors has caused them to be divided into two classes, according to the way the image is represented: CRTs are those that use cathode rays, drawing an image that sweeps the electrical signal, while LCDs use a liquid crystal through substances that share the properties of solids and liquids at the same time.



The device through which the computer lets out sounds. They exist for both table and ear, commonly known as headphones. The functionality is the same and the volume can be regulated from the computer.


Peripheral used to present information on paper. It is the ideal complement to all the text or graphics procedures that the PC has since the printer is the one that takes all that work to the dimension of physical objects, beyond the computer.


Graphics plotter, functional for technical drawing, or architecture tools.



Using some programs, the projectors can enlarge the monitor image and make it visible to large groups of people.


Although they are not peripheral devices, and they are not only output devices (since it simultaneously works as an input device), in fact, the information processed by the PC can be carried there.