What are the differences between Multiprogramming, Multitasking, Multithreading, and Multiprocessing Operating Systems? Multiple programming, performing various tasks, numerous threads, and ...

I just had an MIS test today and was asked this question, which I completely forgot the answer to. So what does each do, and what is the difference between the two?

Multi-programming is the ability to run multiple programs at the same time. In other words, the concurrent resident of multiple programs in the current computer memory is referred to as ...