Coordinated Universal Time (French: temps universel coordonne), coordonnÃ© abbreviated AS, utc is the primary time standard by which the world regulates clocks and. Time it, is within about 1, second mean solar time atÂ° 0; longitude it does not observe daylight saving. time
A multi-user operating system is a computer operating system (OS) that allows multiple users on different computers or terminals to access a single system with one OS on it. These programs are often quite complicated and must be able to properly manage the necessary tasks required by the different users connected to it.
There is no way that such an expensive machine could be used by just a single person. To make it economic, this computer has to be shared. This means it needs a multi-user operating system which means more than one user is logged on and can use the computer at the same time. And furthermore, each person needs to be able to run more than one application at a time, so it needs to be multi-tasking as well.