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Microphones
Microphone is an input device that is used to input sound into a computer. You

hold the microphone up to a source, most likely a person's mouth, and it registers
the sounds and inputs them into audio recording applications.

Microphone

Function: The microphone is used for various applications like adding
sound to a multimedia presentation or for mixing music. This will let

you do many things, from recording a song to talking to someone on
Skype.

Scanner

A scanner is a device that captures and converts documents (text, pictures,
graphs, diagrams, etc.) to images. It is lot like a photocopier

Scanner

Types of scanner are;
1. Hand Held Scanners
2. Flatbed Scanners

3. Digital Camera

Function: By placing a piece of media in a scanner, you can create an
image file that can be opened and manipulated on the computer.

Barcode reader / scanner

Barcode reader is a hand-held or stationary input device used to capture and read