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it is good if we begin the whole thing from understanding the definition of input devices, they are devices used to enter data into the computer for processing.
they are classified into; pointing devices, keying devices, scanning devices and voice input devices.
i) pointing devices:- they input(issue) commands to the computer. they move a cursor on the computer screen. they include like mouse, light pen, track ball, joystick
ii) keying devices:- this are devices that enable one to enter data such as text, into the computer, they include the Keyboard (connected using a cable to the computer) and a keypad (dorm part of the computer as for a laptop and a mobile phone)
iii) scanning devices:- this are devices that enter data directly from its source to the computer. they include; optical scanners, magnetic scanners and digital cameras. with optical scanners, we have Optical Character Recognition (OCR), Optical Mark Recognition (OMR)[e.g the one used in marking KCPE] and Optical Bar Recognition(OBR) [e.g bar code reader].
With magnetic scanners we have the cassette readers.
we also have digital cameras which take images of things from their scenes.
iv) Voice input devices:- these devices enter sound into the computer either for recording and saving or even to allow for amplification. they include things like the Microphone.
NB: any other device that transfers(enters) data into the computer for any for of processing is termed as an input device
Eng melau answered the question on April 12, 2018 at 12:11
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