Operating System Overview. OS Objectives and Functions Evolution of the OS Major Achievements Modern OS Characteristics Windows 2000 UNIX. Operating System. A program that controls the execution of application programs An interface between applications and hardware.
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Type of jobHeavy computeHeavy I/OHeavy I/O
Duration5 min.15 min.10 min.
Memory required50K100 K80 K
Elapsed time30 min.15 min.
Throughput rate6 jobs/hr12 jobs/hr
Mean response time18 min.10 min.