2nd keyboard or mouse, often attached via USB
printer, monitor and so far......
Iris scanners and fingerprint scanners are alternative (biometric) input devices for computers.
handheld scanner
pms
As there is no alternative to input and output devices, other than doing nothing, they have no inherent disadvantages.
It is an input device.
it is an input device
The full form of MICR is Magnetis Ink Character Reader.
it is input
Web-cams are input devices.
A scanner is an input device because it sends (or 'inputs') information to the computer.
mouse is an input device
It is an input device.