Answer :

Tails
1) Input devices are any devices that input information to the computer - Examples include your keyboard, mouse, microphone, ect.

2) Output devices are any devices that output information from the computer. - Examples include your monitor, printer, headset/speakers, ect.

3) Processing devices are devices that take the information and process it. The most obvious example of this is the Central Processing Unit (CPU) on your computer.
Input devices is like connecting a USB and your computer scans the device and gathers information. Output is where information leaves. Processing Devices is like a computer's CPU or Processor. Its the main thing inside the computer that processes all your launches or videos, but rendering videos in youtube is your Graphics Cards job.