An operating system is a master control program due to the fact that it controls the functions of the computer system in all and also in the running of application programs. All computers cannot work without an operating systems.
What is the master controller of a computer?
The operating system is the master controller of the computer system as it is one that helps the PC to send and receive data.
A lot of distributed control system must have a Master Controller. The Master is said to have a board Microcontroller that is dedicated to performing different functions.
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