The three devices that provide input when connected to a non-touchscreen computer are:
- Mouse - It allows users to interact with the computer through point-and-click actions.
- Keyboard - It enables users to input text and commands into the computer.
- Headset with mic - The microphone allows users to input audio, such as voice commands or communication.
The other options (Monitor, CPU, and Printer) do not provide input; they are output devices (Monitor, Printer) or a processing unit (CPU).