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Operating Systems - Term Paper Example

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However, it has taken many years to achieve this. The following report highlights the major achievements that have been recognized in the evolution of the operating system.
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Operating Systems
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It is a situation where the processor works on multiple jobs at a once, that is, when one of the jobs is waiting for I/O, the processor can switch to other jobs. It enabled the machine to have a stream of continuous input, computation and output on one disk using disks which held larger buffers (Brinch, 2000). It uses the multiprogramming facility to work on multiple jobs which are interactive. The processor time is shared by the multiple users and this aims at reducing the time that is required for a problem to be solved.

The system is accessed simultaneously by different users at the same time. It allowed programmers to address memory from logical point of view instead of it being run directly from the hardware (Brinch, 2000). It was first used in the personal computers. These days virtual memory software has been developed to serve the functions that were initially done by the operating system. It has the following features: Differential responsiveness; it enables different classes of job to be discriminated, and Fairness; this is where all processes are given fair and equal access to resources (Johnston, 2005).

The operating system is in form of levels. The functions performed by the layers are related to each other. The lower level performs the most primitive work. This structured operating system breaks the problem into sub problems which are manageable (Johnston, 2005). 2. Virtual Memory: Since virtual memory allows programmers to address memory from logical points instead of being run directly from the hardware has led the programmers to come up with the processor which is an operating system that offers administrators to manage systems and or apply scheduling policies to systems. 3. System Structure: This operating system is divided in form of levels whose functions are interrelated.

It has an advantage to carry out distinctive functions which are done

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