Main Computer Peripherals

The periphery means those external devices of the computer that are connected to it using the USB-connector. They are considered additional, although without many of them, modern users simply would not be able to work or would face great difficulties. All existing computer peripherals are usually divided into two large categories: adapted for input and output of information. Let us consider each of these groups in more detail.

Basic input 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 providing special signals. Therefore, the most, perhaps, important and indispensable devices of a personal computer are different keyboards that are necessarily attached to the latter when selling. External they are often in stationary models, as laptops, netbooks and other compact models have, as a rule, a built-in keyboard.

The main parameters for such devices are the following: convenience, design and the maximum number of keystrokes until the moment of its failure. Currently, there are a large number of models for every taste, even futuristic. One of the most interesting novelties is the laser keyboard. This model looks like a luminous projection on the plane, which externally strongly resembles a device from a fantastic film.

Mouse

Other (similar in function to the previous ones) computer peripherals are the mouse. They are laser, optical and mechanical. Mice, as well as keyboards, can be wireless. As a rule, they have a wheel or an average 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 aside is a separate subspecies - a trackball.

The latter is often used in military computers, since it allows you to maintain controllability with strong vibrations and external disturbances. In mice, the basic parameters are the same as for keyboards. In addition, the responsiveness to the user's hand movement and resolution is important. These gadgets are another indispensable device for computer management. In fact, the mouse and keyboard are a standard set for most operations performed on a PC.

Touchpad

The given external devices of the computer are intended, basically, for laptops. They act by moving their finger across the active area. Also there are two buttons, similar in meaning to those that are available in the mouse. The standard size of the touchpad is small, which saves a lot of space.

In addition, it is necessary to list such peripheral devices of the computer, as joysticks and graphic tablets. Both have a narrower focus. Tablets are actively used by artists and designers, while joysticks are most popular among computer game enthusiasts.

Scanner

There is also another type of technology. These are peripheral devices of a personal computer, intended for input of the whole graphic images. Unlike the tablet, you do not need to draw anything here, just place the necessary information in the working area of the device. Next, he will analyze it and, converting to digital form, displays a copy on the monitor. Scanners are color and black and white. By type and size, these devices are divided into portable, hand, network, office (tablet) and widescreen.

The main computer peripherals for outputting information

Monitor

Without which you can not do without it when working on a computer, this is without the means of graphical display of information. Monitors are just as indispensable in operation as the mouse and keyboard. They are graphic and alphanumeric. In addition, distinguish between monochrome and color: active-matrix and passive-matrix liquid crystal devices.

Printer

Such devices are designed to convert and output graphic information to print. Most often, the data is printed on paper, but it can also be, for example, a laser disc. Distinguish matrix - the very first of the appeared, and more modern - laser and inkjet models of printers.

In addition to the above devices, peripherals include columns, modems, web cameras, a variety of tape drives and plotters.