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.
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.