Input means to put an entity into something else.
In this case, input means to put data into the computer
for processing in order to get a
result. The flow of communication is from user to machine.
Input devices are used to accomplish input. (Duh)
Input devices are a type of hardware that allows a user to enter data into a computer system.
Simple.
The two most commonly used input devices are the mouse
and keyboard. Of course, there are other input devices, and they can be divided into
different categories.