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

Paraphrasing wikipedia:

Multiprogramming - A computer running more than one program at a time (like running Excel and Firefox simultaneously) http://en.wikipedia.org/wiki/Multiprogramming

Multiprocessing - A computer using more than one CPU at a time http://en.wikipedia.org/wiki/Multiprocessing

Multitasking - Tasks sharing a common resource (like 1 CPU) http://en.wikipedia.org/wiki/Computer_multitasking#Multithreading

• Thus, something like multithreading is an extension of multitasking.