A scanner serves as an input device only.
an input device
A copier is neither an input device nor an output device because it need not be connected to a computer and usually is not. A Printer, which may also be used as a copier, is an output peripheral device. A Scanner, which feeds data to a computer, is an input peripheral device. Modern digital copiers use scanners as their "front ends". The scanner is then an input device to a copier.
It scans and input data into a PC. (Input device)
The Keyboard is an Input Device. It is used to enter text and utilise commands. It is a peripheral.
Input, output and storage.
peripheral
A scanner is the computer peripheral used as an input in an office. Input devices are things you attach to a computer.
Input Device
input device..
any data transfer one place to another palace easily with the help of peripheral device. its most important for our computer. its a hardware like pendrive input output device, scanner etc.
Scanners can only be used as an input device. They scan the image placed inside/ontop and digitalise it and display it on your computer screen. The only type of scanner that can output is an "all-in-one" scanner/printer that can print out the images you scan in or other images from your PC, but that is not technically a scanner, it is a scanner, printer combination. So no, Scanners can only be used as input devices.