What is an i/o device?

i/o device refers to "input/output device", which is hardware that can transmit data to and from the computer. Input device is a device that inputs data and information into the computer. It is a bridge for communication between the computer and the user or other devices. It is one of the main devices for information exchange between the user and the computer system. Output device is a general term for devices that send information from the outside world to the computer and devices that return processing results to the outside world. They can express various calculation result data or information in the form of numbers, characters, images, sounds, etc.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

i/o device refers to "input/output device".

Input/Output (Input /Output, referred to as I/O) refers to the data transmission process that occurs between all operations, programs or devices and the computer.

Input/output devices refer to hardware that can transmit data to and from a computer.

Input device

Input device (Input device) is a device that inputs data and information to the computer. It is a bridge between computers and users or other devices. Input devices are one of the main devices for information exchange between users and computer systems. Keyboards, mice, cameras, scanners, light pens, handwriting input tablets, joysticks, voice input devices, etc. are all input devices. Input device (InputDevice) is a device for human or external interaction with the computer. It is used to input raw data and programs for processing these numbers 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., which can be input into the computer through different types of input devices for processing. 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 equipment: mouse, joystick, light pen;

• Image input devices: cameras, scanners, fax machines;

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

Output device

The output device (Output Device) is the terminal device of the computer hardware system, used to receive the computer Data output display, printing, sound, control of peripheral device operations, etc. It also expresses various calculation result data or information in the form of numbers, characters, images, sounds, etc. Common output devices include monitors, printers, plotters, image output systems, voice output systems, magnetic recording devices, etc.

Output device is a general term for devices that send information from the outside world to the computer and devices that return 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. .

Types of output devices

There are also many types of output devices. Commonly used output devices in computers include various printers, punched output devices, display devices, plotters, etc. Printers and display devices have become essential equipment for every computer and most terminals.

Paper tape punching output machine Paper tape punching output equipment for computers. Computer output is represented by small holes on punched paper tape. This can not only store the information on the paper tape for a long time, but also use the punched paper tape to input it into the computer.

Card punching output machine Card punching output equipment for computers. Punch cards are easy to read, can be stored for a long time, and can also be used as computer input.

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