Peripherals mean those external devices of a computer that are connected to it using a USB connector. They are considered optional, although without many of them modern users simply could not work or would have encountered great difficulties. All existing computer peripherals are usually divided into two broad categories: adapted for input and output of information. Let us consider in more detail each of these groups.
Basic data entry devices
Keyboard
Gadgets can carry a variety of functions, but the general purpose remains the same - to control the operation of the machine by entering information and applying special signals. Therefore, the most, perhaps, the most important and indispensable devices of a personal computer are various keyboards that are necessarily attached to the latter when sold. They are more often external to stationary models, since laptops, netbooks and other compact models usually have a built-in keyboard.
The main parameters for such devices are the following: convenience, design and the maximum number of keystrokes until it is refused. Currently, there are a large number of models for every taste, even futuristic. One of the most interesting novelties is the laser keyboard. Such a model looks like a luminous projection on a plane, which makes it looks very much like a device from a science fiction film.
Mouse
Other (similar in function to the previous) computer peripherals are mice. They are laser, optical and mechanical. Mice, as well as keyboards, can be wireless. As a rule, they have a wheel or a middle button that replaces it. There are even special gaming mice - for gamers. They are equipped with a large number of additional buttons, and also have improved response parameters. A little apart is a separate subspecies - trackball.
The latter is often used in military computers, as it allows you to maintain control with strong vibrations and external noise. The mice have the same basic parameters as the keyboards. In addition, responsiveness to the user's hand movement and resolution are important. These gadgets are another indispensable computer control device. In fact, a mouse and keyboard are a standard set for most PC operations.
Touchpad
These external computer devices are intended primarily for laptops. They act by moving the finger along the active area. There are also two buttons that are similar in meaning to those that are on the mouse. In their standard dimensions, the touchpads are small, which can significantly save space.
In addition, computer peripherals such as joysticks and graphics tablets should be listed . Both those and others have a narrower focus. Tablets are actively used by artists and designers, while joysticks are most popular among fans of computer games.
Scanner
There is also another subtype of technology. These are peripherals of a personal computer designed to input entire graphic images. Unlike a tablet, you don’t need to draw anything here, just place the necessary information in the working area of the device. Then he will analyze it himself and, having converted it into digital form, will display a copy on the monitor. Scanners come in color and black and white. By type and size, these devices are divided into portable, manual, network, office (tablet) and widescreen.
Basic computer peripherals for outputting information
Monitor
What you definitely can’t do without when working at a computer is without a means of graphically displaying information. Monitors are as much an indispensable element as mice and keyboards. They are graphic and alphanumeric. In addition, there are monochrome and color: active-matrix and passive-matrix liquid crystal devices.
a printer
Such devices are designed to convert and print graphic information . Most often, the data is displayed on paper, but it can also be, for example, a laser disk. There are matrix - the very first of those that have appeared, and more modern - laser and inkjet printer models.
In addition to the above devices, peripherals should include speakers, modems, webcams, a variety of streamers and plotters.