Computer Input And Output Devices

An input device send  information to computer system for processing and output device reproduce or display the input in form of image or text on the display scree of computer and laptop. Input devices only allows for input of data to computer. and output devices only receive data in form of other devices. 

Input devices:

              An input device can send data to other device but it can not receive data from other devices. Examples of input devices includes following.

• Keyboard  and mouse  - Accepts input from a user and sends that data (input) to the computer. They cannot accept or reproduce information (output) from the computer.
• Microphone  - Receives sound generated by a user or other source (input) and sends that sound to a computer. It cannot receive and reproduce (output) sound sent by other devices.
• Webcam - Receives images generated by whatever it is pointed at (input) and sends those images to a computer. It cannot receive and reproduce (output) images sent by other devices.

Output devices

An output device can receive data from another device and generate output with that data, but it cannot send data to another device. Examples of output devices include the following.

• 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 or other source and send that 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 or other source and send that data to another device.
• Speaker  - Receives sound data from a computer or other device (output) and plays the sounds for users to hear. It cannot accept sound generated by users and send that sound to another device.

Input/Output devices

And 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 Deice and DVD-RW Derive  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 Device - Receives, or saves, data from a computer or other device (input). Also, the drive sends data to a computer or another device (output).