Difference between multitasking, multithreading and multiprocessing?

Question

Whats the difference between multitasking, multiprogramming & multiprocessing

This comes regularly for my university OS exams and I can\'t find a good answer. I

Answer 1

Multiprogramming - A computer running more than one program at a time (like running Excel and Firefox simultaneously)

Multiprocessing - A computer using more than one CPU at a time

Multiprogramming - More than one task/program/job/process can reside into the main memory at one point of time. This ability of the OS is called multiprogramming.

Multitasking: More than one task/program/job/process can reside into the same CPU at one point of time. This ability of the OS is called multitasking.

Multiusers System - a computer system in which multiple terminals connect to a host computer that handles processing tasks.