Are input and output devices devices used to store programs and data?

Input and output devices are not devices used to store programs and data, storage devices are. Input devices are devices that input data and information into computers; output devices are terminal devices of computer hardware systems, used to express various calculation result data or information in the form of numbers, characters, images, sounds, etc. A storage device is a device used to store information.

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

Input and output devices are not devices used to store programs and data, storage devices are.

Input and output devices (IO devices) are one of the key external devices of the data processing system and can be used interactively with the computer body.

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 [1] input devices can be divided into the following categories according to their functions:

● Character input devices: keyboard;

● Optical reading devices: optical mark readers, optical character readers;

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

● Image input device: digital camera, scanner, fax machine;

● Analog input device: Language analog-to-digital conversion recognition system.

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

Output device

The output device (Output Device) is the terminal device of the computer hardware system, used to receive computer data output display, printing, sound, and control peripheral devices Operation 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.

Storage device

Storage device is a device used to store information. It usually digitizes the information and then stores it in electrical, magnetic or optical media. .

Common storage devices

1. Devices that use electrical energy to store information, such as various memories, such as RAM, ROM, etc.

2. Devices that use magnetic energy to store information Such as: hard disk, floppy disk (already eliminated), magnetic tape, magnetic core memory, magnetic bubble memory (magnetic bubble memory appeared in the 1970s, but failed to achieve commercial success when the price of hard disks dropped sharply in the 1980s.), U Disk

3. Devices that use optical methods to store information, such as CD or DVD

4. Devices that use magneto-optical methods to store information, such as MO (magneto-optical disks)

5. Equipment that uses other physical objects such as paper cards, paper tapes, etc. to store information, such as: punched cards, punched tapes, knots, etc.

6. Dedicated storage system: used for data backup or disaster recovery Dedicated information system, a device that uses high-speed networks to store large amounts of information.

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