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Compare And Contrast Essay

614 words - 3 pages

Compare and Contrast
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Compare and Contrast
This paper will give a comparison and contrast between and mainframes and Personal Computers. Over the years personal computers and mainframes have made huge advances over the years. Personal computers are just what they are called personal computers while mainframes are used for large businesses and organizations for multiple users. Both have had enormous changes over the years, dumb terminals have evolved into what we now call personal computers. Mainframes started out as very large machines, they use to occupy anywhere from 2,000 to 10,000 square feet sometimes more. They are now around the size of other types of commercial-use computers.
We have personal computers because of mainframes they are part main frame and part dumb terminal. This is why mainframes and personal computers have the similarities that they do. Both ...view middle of the document...

One megabyte was the limit for DOS years ago. Large corporations needed batch processing and to use batch processing needed more memory. They did not care if they spent extra money as long as they were able to get the speed that was needed. Now mainframes are not the only way to go when it comes to megabytes of space. Personal computers can do the same thing now. Windows 95 changed that when it was released to the public. Someday mainframes and personal computers will be the same.
The personal computer and mainframe both have operating systems but they are very different. The operating system that is in the mainframe is much more complex than the one that is in the personal computer. The reason for this is because the mainframe is set up for multi-user. The need for extra stability and security is required. Personal computers require to be reset often but as for a mainframe it should not have to be reset as often. Resetting a mainframe can involve thousands of users.
Many users can be supported by the mainframe. Mainframes need to use multiple processors, because of the extra load that it receives. Mainframes use multiple processors while personal computers use one. More than one processer is an option for personal computers. Much of the stability of the mainframe is from having a backup or extra processor. The complexity of the mainframes operating system is because of the backup processor. The mainframe stability is important because the mainframe is expected to run 7 days a week 24 hours a day. The mainframe works continuously never stopping. Users are encouraged to use the mainframe as much as possible to offset the cost.
Personal computers and Mainframes were considerably different when they were first introduced. A mainframe could take up tens of thousands of square feet and the personal computer started out as a dumb terminal working with the mainframe. Now as everyday passes they become more alike. One day they will be identical and we will not be able to tell them apart.

Bibliography

Chunawalla, Q. (2010). What is a mainframe? Retrieved from IBM Mainframes 360: http://www.mainframes360.com/2009/06/what-is-mainframe-computer.html

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