POS/355: Introduction to Operating Systems

After researching mainframe computers, I am convinced that business mainframes would be the best option. They seem to be the most reliable choice of computing platform. Its strengths include the availability of updated software, automatic error logs, reboots are not necessary, and they someday may eliminate the services of a system administrator. On the other hand PC’s are not too difficult to maintain and practically anyone can easily add new components with little or no training. PC’s may crash more than mainframe computers, but the maintenance is guaranteed to be less expensive than the maintenance on a mainframe.

When comparing PC’s to Mainframes the first point of comparison is the price. For large businesses with thousands of employees, mainframe computers are the best choice especially

The hardware used in PCs and the mainframes are very similar. Over the years, their architecture has not changed. The complexity of both systems has changed but they still possess the same logical components. Both PC’s and mainframes possess processors, hard drives, memory, operating systems, and displays. Because the mainframe supports many users, multiple processors are needed to handle the extra load that mainframes receive. Multiple processors are the standard for mainframes while it is only an option for personal computers. This enhances the mainframe's stability because a backup processor can be used in case of a failure.

The operating systems of the mainframe are not any bigger than the PC’s operating system. They contain a lot less code to support the Graphical User Interfaces, and a lot more code for error detection, error isolation, and recovery. The deployment of mainframe operating systems is not growing as fast as PC operating systems.

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