Personal computer Devices/Компьютерные устройства

An external device of a personal computer.

Their purpose and a brief description.

External (peripheral) devices of a personal computer is an essential part of any computer system. External devices allow computer to communicate with the environment — users, facilities management, and other computers. External devices are connected to the computer through special connectors ports I / o.

To external devices are:

• input device information;

• output device information;

• dialog means user;

• means of communication and telecommunications

The input devices include:

keyboard — a device for manually entering into a computer the numeric, textual and control information;

graphic tablet for manual input of graphic information, the images by moving the plate a special pointer (pen); when you move the pen automatically reads the coordinates of his location and enter these coordinates in the computer;

scanners for automated capture from paper and typing in computer typewritten text, graphics, pictures, drawings;

touch screens for input of individual picture elements, programs, or commands with split-screen display to the computer

graphic manipulators for input of graphic information on monitor screen by controlling the cursor movement on the screen with subsequent encoding of the coordinates of the cursor and enter them into the computer (joystick, mouse, trackball, light pen)

The output device information includes:

plotters (plotters) for graphical output on paper

printers — printers to print information on paper

To a dialog user tools include: monitors device to display the input and output information

the speech input device and output information. These include different MIC speaker system, and various synth sound that performs the conversion of digital codes into letters and words played back through speakers or speakers connected to the computer

Communications and telecommunications are used to connect a computer to TV connection, other computers and computer networks. This group primarily includes network adapters. The network adapter is most commonly used modems (modulator-demodulator)

Multimedia is the complex of hardware and software that allows people to communicate by computer using a variety of natural environments: sound, video, graphics, text, animation, etc. The multimedia include: • the speech input device and output information; • microphones and video cameras, audio and video system with amplifiers, speakers, large video screens; • sound and video cards, video capture cards, removing the picture from the VCR or camcorder and usher him into the computer; • scanners; • external storage device of large capacity optical discs commonly used for recording audio and video information.

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