List a few alternative options of input and output over the the standard keyboard and monitor

   Input devices are those on which you can give a specific command to the. Whereas, output devices are those which performs the certain command given to them.

Input devices:

-Mouse

-Touchpad

-Touch screen

-Microphone

-Laser printers  

-Scanners

-Webcam

Output Devices:  

-Sound output (e.g. speakers, headsets)

-Projectors

-Plotters

-LCD panels

-Mointors (LED,LCD,CTR)

Both input and output device example can be a headphone which has a microphone (Input device) and a speaker (output device) too.