What is a computer s input device?

Common input devices in computers are: keyboards, mice, cameras, scanners, light pens, handwriting tablets, joysticks, voice input devices, etc.

Input devices are divided into input devices and interactive input devices. The equipment that adopts the best input includes paper tape input machine, card input machine, scanner, optical character reader (OCR), optical mark reader (OMR), IC card reader, magnetic card reader, barcode reader, tape drive, floppy disk drive, optical disk drive, etc.

These devices feed information recorded on a variety of ** (e.g., perforated paper tapes, perforated cards, paper, tapes, floppy disks, optical discs) into the computer. Interactive input devices include keyboards, light pens, mouse, touch screens, tracking balls, joysticks, and more. The user and the computer talk to each other for input, and the content of the input and the computer's response can be seen from the screen of the monitor.

Since the 90s of the 20th century, handwritten Chinese character recognition devices and handwritten Chinese character input devices have been put into practical use, and the research on speech input devices has also reached a certain level, and digital cameras as image input devices have also begun to become popular. A keyboard is an input device consisting of keys. Users input programs, commands, and data into a computer by keystrokes.

The number of keys on the keyboard varies depending on the usage requirements. Each key of the keyboard has a key switch, which is used to detect the key action and convert the mechanical displacement into an electrical signal. The key switches are arranged in a m n matrix, that is, each key switch has a fixed position on the m n matrix.

Keyboards, mice, cameras, scanners, light pens, writing tablets, joysticks, voice input devices, etc. are all input devices.

There are many types of output devices in computers: printers, monitors, speakers, etc.

Mouse, keyboard, microphone, camera, scanner, etc.

1. The keyboard is a character input device of the computer;

2. Optical mark reader and optical character reader are optical reading equipment of computers;

3. Mouse, joystick and light pen are the graphics input devices of the computer;

4. Cameras, scanners and fax machines are image input devices of computers;

5. The language analog-to-digital conversion recognition system is an analog input device of the computer.

<> input device:

1. It is a device for inputting data and information into the computer, a bridge for communication between the computer and the user or other equipment, and one of the main devices for information exchange between the user and the computer system;

2. Keyboards, mice, cameras, scanners, light pens, handwriting tablets, joysticks, voice input devices, etc. all belong to input devices, which are a device for people or external interactions with computers, and are used to input raw data and programs that process these numbers into the computer;

3. The computer can receive all kinds of data, but it can be numerical data, but it can also be a variety of non-numerical data, such as graphics, images, sounds, etc., can be input into the computer through different types of input devices for storage, processing and output.

Output device: 1. It is the terminal equipment of the computer hardware system, which is used to receive computer data for output display, printing, sound, control peripheral equipment operation, etc.;

2. The data or information of various calculation results are expressed in the form of numbers, characters, images, sounds, etc., and the common output devices include monitors, printers, plotters, image output systems, voice output systems, magnetic recording equipment, etc.

Computer input devices include keyboards, mice, cameras, scanners, light pens, handwriting tablets, joysticks, voice input devices, etc.

1. Mouse (mouse) is a handheld screen coordinate positioning device, which is an input device that adapts to the software and graphics processing environment of menu operation, especially in the current popular Windows graphics operating system environment, the application of mouse is convenient and fast. There are two types of mouse devices commonly used, one is mechanical and the other is photoelectric.

2. Camera (camera or webcam), also known as computer camera, computer eye, electronic eye, etc., is a kind of input device, which is widely used in conferences, telemedicine and real-time monitoring.

3. Scanner is a device that uses photoelectric technology and digital processing technology to convert graphics or image information into digital signals in a scanning way.

4. Light pen, also known as photoelectric pen, is a device that uses light and photocell to read special forms of data, such as barcode record sheets, into the computer system, and its appearance is similar to that of a fountain pen, so it is commonly known as light pen.

5. Voice input and output device refers to the human-computer interface device that directly inputs or outputs human voice information to the computer. Most of the information that people transmit in their daily lives is through voice, so voice input and output devices are an important development direction of human-computer interface devices.

Character input device: keyboard;

Graphics input devices: mouse, joystick, light pen;

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

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

<> input device:

The input device is a device that injects information into the computer, and the commonly used input devices are:

1) The keyboard --- the most basic device for people to input information into the computer;

2) mouse --- a cursor pointing device;

3) Touch screen --- a coordinate positioning device, which is often used in public inquiry systems.

Output device. The output device is a device that directly provides the results of computer operation to people, and the commonly used output devices are:

1) The monitor --- the main output device of the computer, which together with the keyboard constitutes the most basic human-computer dialogue environment;

2) Printer--- printer provides users with a hard copy of computer information.

Commonly used printers are: percussion, inkjet, and laser printers.

There are several types of input devices for computers:

1. The most basic input devices: keyboard and mouse.

2. Extended input devices: scanners, digital cameras, camcorders, etc.

3. Touch screen input, writing tablet.

<> input device:

The input device is a device that injects information into the computer, and the commonly used input devices are:

1) The keyboard --- the most basic device for people to input information into the computer;

2) mouse --- a cursor pointing device;

3) Touch screen --- a coordinate positioning device, which is often used in public inquiry systems.

Output device. The output device is a device that directly provides the results of computer operation to people, and the commonly used output devices are:

1) The monitor --- the main output device of the computer, which together with the keyboard constitutes the most basic human-computer dialogue environment;

2) Printer--- printer provides users with a hard copy of computer information.

Commonly used printers are: percussion, inkjet, and laser printers.

Optical discs (both input devices and storage devices) and printers and monitors that visually reveal electronic information are output devices.