What equipment does the microcomputer system mainly use to exchange information with the outside world?

Mainly through "input and output devices". The input device is a bridge for communication between the computer and the user or other equipment, and is one of the main devices for information exchange between the user and the computer system; the output device is to convert the results or intermediate results of calculation or processing in various forms that can be recognized by humans. Therefore, input and output devices serve as a link between humans and machines.

The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

The microcomputer system exchanges information with the outside mainly through "input and output devices".

Input and output devices (IO devices) are one of the key external devices of the data processing system. They can be used interactively with the computer body and play the role of human and computer, equipment and computer, computer and computer. Contact function.

Input device

Input device is a device that inputs data and information to the computer. It is a bridge between the computer and the user or other devices, and between the user and the computer system. One of the main devices for information exchange. The task of the input device is to transmit data, instructions and certain sign information to the computer. Keyboards, mice, cameras, scanners, light pens, handwriting input tablets, joysticks, voice input devices, etc. are all input devices (Input Device). They are a device for humans or external devices to interact with computers. They are used to convert raw data to Programs that process this data are fed into the computer.

Computers can receive a variety of data, which can be numerical data or various non-numeric data, such as graphics, images, sounds, etc., through different types of input devices Input into the computer for storage, processing and output.

Computer input devices can be divided into the following categories according to their functions:

• Character input devices: keyboard;

• Optical Reading equipment: optical mark reader, optical character reader;

• Graphic input device: mouse, joystick, light pen;

• Image input Equipment: digital cameras, scanners, fax machines;

• Analog input equipment: Language analog-to-digital conversion recognition system.

(such as photoelectric tape input device, card input device, optical character reader, tape input equipment, Chinese character input equipment, mouse, etc.) to send data, programs and control information within the computer.

Output device

The output device (Output Device) is to convert the results or intermediate results of calculation or processing into various forms that humans can recognize, such as numbers, symbols, Letters, etc. are represented, so the input and output devices play the role of communication between humans and machines.

The output device is the terminal device of the computer hardware system, which is used to receive the output display, printing, sound, and control of peripheral device operations of computer data. It also expresses various calculation result data or information in the form of numbers, characters, images, sounds, etc.

Function:

The output device is the general term for the device that sends information from the outside world to the computer and the device that returns the processing results to the outside world. These returned results may be experienced visually by the user, or as input to other devices controlled by the computer: for a robot, the output of the control computer is basically the robot itself, such as performing various behaviors. .

Classification of output devices:

• Display

  Display (Display), also known as monitor, is the main tool for realizing human-computer dialogue. It can not only display commands or data entered by the keyboard, but also display the results of computer data processing

• Printer

  The printer (Printer) prints the computer processing results on Paper output device. People often refer to the output of the monitor as soft copy and the output of the printer as hard copy. A device that converts computer output data into printed fonts. From the perspective of use, it can be divided into two categories. One type has keyboard input function, which is slower, but has the ability to communicate with the computer. It is low in price, and in addition to being commonly used in computers and terminals, communication systems also use it as a conventional device. The other type has no keyboard input function. This type of printer can be divided into strip printers, narrow line printers, serial printers, line printers and page printers. According to the physical structure, printers can be divided into two categories: impact type and non-impact type.

• Plotting machine

  Automatic plotting machine is a drawing device directly controlled by an electronic computer or digital signal to automatically output various graphics, images and characters. Can work online or offline. It is a peripheral device widely used in computer-aided drafting and computer-aided design.

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