The input peripherals or devices are system components that responsible for providing data to the computer, and without them it would be impossible to attempt any operation with the PC. Over the years, technology has evolved incredibly, but the way we have to communicate with a computer remains the same since four decades ago.
Although today we can find many attempts to replace these devices, the fact is that the ease that these old comrades of the PC supply us for the entry and manipulation of data are practically inimitable, and we have become so accustomed to their use it will be impossible to get rid of them easily.
From this point, this article will discuss all the characteristics of three peripheral input devices that are the most popular and used worldwide.
The three most common examples of input devices are:
- The keyboard
- The mouse
- The scanner
Each of these devices has a number of conditions that allow us to enter data to the computer in different ways.
The keyboard is basically a set of buttons, which they represent, each, different characters. In conjunction with the display, form the basic kit of input and output data.
The computer keyboard is similar to the old typewriters machines keyboard, except that some keys are added to control certain functions of the PC, such as Ctrl, Windows key and Pause, among others.
They also have other characteristics as shortcut keys, which are special keys that can help users save steps to get to a particular place or run various applications as email, web browser or file browser.
Examples of shortcut keys are the keys F1 to F12 and so-called multimedia keys, which allow us to trigger commands of music player or video such as up or down the volume and play or pause.
It is considered the main input device until the voice recognition systems are perfected to the point that they have succeed in interpreting speech.
Note that keyboards can have the Dvorak or QWERTY key layout, the latter being the most widespread.
Mouse are small and ergonomic device with two or three keys or buttons and a very useful Internet browsing central wheel. As moves on a flat surface, the movement produces a similar movement in the cursor displayed on the screen.
There are many types and models of mouse, and among them are wireless, optical and laser, which use different types of technologies to achieve the movement.
This peripheral it is capable of digitizing drawings and photographs, allowing these to be stored in the computer in digital format for later use.
Voice recognition system
This new technology is able to digitizing the voice through a device such as microphone, allowing the computer to recognize and execute commands through human speech. While it is a subject that is constantly developing, they have taken sufficient steps and today has a level of sophistication such that it can be used in some types of applications such as implemented in the iPhone, called Siri, in Windows through Cortana, or in the Android operating system through Google Now.
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