Anything that you can you to input actions or data into a computer. For example mice and keyboards are input peripherals because you use them to give the computer input of actions you want it to perform. This includes actions like opening a web browser with a mouse click or typing characters to the screen with a keyboard.
The opposite would be an output peripheral which would be something like the computer screen itself.
Anything that you can insert things on a pc a mouse or a keyboard, a web cam but a printer isn’t one input think become prints out things a scanner is an input method
