Input and Output devices

Input and Output Devices

An input device sends information to a computer system for processing and an output device reproduces or displays the results of that processing. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device.

An input device is a hardware or peripheral device used to send data to a computer. An input device allows users to communicate and feed instructions and data to computers for processing, display, storage and/or transmission. Examples of input devices include:

• Keyboards: Allow users to input alphanumeric data and commands
• Pointing devices and game controllers: Allow users to direct application software and interact with graphical user interfaces
• Audio and video devices: Allow users to capture sound and images 

An output device is any device used to send data from a computer to another device or user.  Most computer data output that is meant for humans is in the form of audio or video. Thus, most output devices used by humans are in these categories. Examples of output devices include:

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• ·       Monitor- Receives data from a computer (output) and displays that information as text and images for users to view. It cannot accept data from a user and send the data to another device.  
  ·       Projector - Receives data from a computer (output) and displays, or projects, that information as text and images onto a surface, like a wall or a screen. It cannot accept data from a user and send that data to another device.
  ·     Speaker- Receives sound data from a computer and plays the sounds for users to hear. It cannot accept sound generated by users and send that sound to another device.
• An input/output device can receive data from users or another device and also send data to another device. Examples of input/output devices include the following.

• CD-RW DRIVE and DVD-RW DRIVE - Receives data from a computer (input), to copy onto a writable CD or DVD. Also, the drive sends data contained on a CD or DVD (output) to a computer.
• USB flash drive - Receives, or saves, data from a computer (input). Also, the drive sends data to a computer or another device (output). (1)

 References: 1.https://www.computerhope.com/issues/ch001355.htm

2.https://community.webroot.com/tech-talk-7/why-are-computers-so-important-47952

3.https://turbofuture.com/computers/Classification-Of-Computers-According-To-Size