What is an Operating System?

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Operating System


a program that acts as an intermediate between a user and the computer hardware
controls all computer's resource (memory, harddisk(s), ...)
create a base for user level application so that user-level programmer don't have to worry about the hardware facility, e.g. in using 'printf'.





Components inside Operating System


(Four Basic Components)

Process Management (Scheduler)
Creation and deletion of both user and system processes
Scheduling of the processes
Keep track ...