An Operating-System (OS) represents a software-layer to access the computer hardware, some OS es handle only rather primitive tasks such as multi-user and multi-tasking capability, others even implement a GUI (Graphical User Interface):

OS LAB\fcfs.doc
......\fifo.doc
......\lfu.doc
......\lru.doc
......\rr.doc
......\SJF.doc
OS LAB

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