With the beginning of the mass distribution of computer technology in everyday speech, the term "data input-output devices" has increasingly become more common. Under it are hidden entire groups of different devices. In this paper, we describe the most popular of the two groups (output and input devices) as applied to a household personal computer.
Many people know a funny story when, when asked “What is your computer?”, The user, without any hesitation, answers: “Samsung” by reading the name on the monitor. The merry men even came up with a similar joke. It seems to be funny, but even now there are still users who respond in the same way. Of course, you can point out the error, but it’s much more efficient to explain what output devices are.
A computer that does not have the ability to somehow give the results of its work is a thing in itself, and completely useless. Output devices are designed to provide results. Among them, one of the most important is represented by the monitor. The computer regularly performs the tasks and gives answers to the monitor. In this case, “answers” ​​mean not only numbers, but also any visual information. Even watching a movie is a calculation presented on the screen. Obviously, you cannot answer the question about the computer by reading the name on the monitor. These are different things, connected only indirectly.
Output devices are not limited to just a monitor. The sound adapter functions are no less demanded: even the first computers could play relatively complex compositions with the help of a speaker (PC speaker), and now some applications even refuse to start if the system does not have a full sound card.
The next popular device is a printer, a characteristic feature of which is that with its help the computer is able to output data to paper. Currently, their prices have dropped significantly, so often the printer is immediately purchased with the computer.
In addition to the above components, there are specialized data output devices that are rarely used at home.
To enter a task into the computer, input devices are used. Their list is much more extensive than that of the previous group. This is very simply explained: a person has only five senses, and the most simple and rational is to interact with two of them, but there are much more ways to enter data available to a person.
The main device is a keyboard. Through it, 90% of the information to be processed is entered. For many years, attempts have been made to suppress it, replacing it with something more optimal. For example, the idea of ​​voice input is very tempting: science fiction writers have long understood its advantages and almost never remember their keyboards in their stories.
The principle of operation of voice input programs is based on the analysis of words spoken by a person and converting them into entered data. It looks as follows: the program starts, the microphone is connected and control commands are given or text data is read. When the words “minimize the window” are minimized, etc. And typing becomes very simple, because the computer takes on the functions of a stenographer. Alas, the recognition rate of spoken words is still low.
The mouse-type manipulator is familiar to everyone. With the advent of graphical programming interfaces, it has become very popular.
Development trends suggest that touch screen monitors will soon appear and become affordable.
On the shelves of electronics stores you can find various joysticks and even high-tech steering wheels that will interest fans to play computer games.
Artists and designers use a light pen in their work, thanks to which the picture being drawn immediately gets into the computer.