Wednesday, February 27, 2013

personal Computer very useful


                 A personal computer or PC is a relatively small, inexpensive computer that is designed for use by one person at a time.
      Personal computers first appeared in the late 1970’s. one of the first and most popular personal computers was the apple II, introduced in 1977.
     Today, PCs can be desktop PCs, laptops, or tablets. Users have access to a wide range or commercial and free software which is easily installed.
Apple II Computer(1977)
                 In fact, now more than 10,000 application programs are available for use on personal computers. They include word processing programs, spreadsheet programs, database programs, and communication programs .
     Word processing programs are used to type, correct, rearrange, or delete text in letters, memos, reports, and school assignments. Database programs allow a computer to store large amounts of data in a systematic way. Communication programs connect a personal computer to other computers.

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