Multiuser refers to having more than 1 person able to log into the computer and each person have their own settings (bookmark, desktop, themes, etc) Multitasking is the ability of the computer to do more than 1 thing (program) at a time. There was a time when you could not surf, type in word and listen to music on your computer all at one time.
Multitasking is the ability to operate more than one program at a time. There are two types of multi-tasking as well, preemptive and cooperative. Preemptive means that each program can request the amount of resources it needs, and the operating system will take it from a program that is not using it. Cooperative means that the programs have to be designed to share resources, or whichever program is running in the foreground will get all the resources. This means that a background program, like a media player playing a song, can't play music while you are surfing a web page, unless the programs are designed to do that.
Multi-user means the operating system has clear distinctions between users. Users cannot destroy each other's files, and unprivileged users cannot make changes to the system itself, like install new software.
Single-tasking, single user - DOS, some older versions of the Mac operating system, video game consoles, etc...
Multitasking (cooperative), single user - Windows 3.1, Mac OS 9.
Multitasking (preemptive), single user - Windows 95/98/ME
Multitasking (preemptive), multi-user - Windows NT/2000/Xp/Vista, Mac OS X, Linux
* Multiuser: A computer system the can handle more then one user at a time. Windows is not a multiuser OS. It can handle only one user at a time. * Multitasking: The ability of an OS to do more then one thing at atime. for instance, you can be downloading a large file and still use another program to do something, like write a book. * Multiprocessing: The chip in new computers is able to do more then one task at a time because there is more then one processing unit on/in the chip.
Nope it's not, a multiuser OS can be used by many people, one at at time. Lets say you have one computer for the whole family to share, you can use a different login for them so they can only log into their part only after you are done with it.With a Multitasking OS you can do more then one thing at a time, like, watch a movie on your device and play a game at the same time.Here's another analogy, rub your belly and at the same time pat your head, that's multitasking.
First of all there is difference between program and a task. There may be multiple tasks running related to one program at the same time. so if the processor is busy in multiple tasks related to one program then it is multitasking. But if the multiple tasks which the processor is executing concurrently are related to different independent programs then the concept is know as multiprogramming.
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