Computer Hardware Question 8: What is a mainframe?
The largest, most expensive computers are known as mainframes (see computer hardware questions 8 through 12 for information about the different types of computers). They generally cost hundreds of thousands or even millions of dollars and they usually are used as central data processing and storage devices by large businesses or government agencies. The computer users can usually access the mainframes from many different offices that can be in different buildings or even in different cities. Many people can be in contact with the mainframe at the same time and, at any one moment, the mainframe can be processing several different programs for several different users. For that reason, mainframes are often referred to as host computers in that they are host to many users in many different locations. Many printers and a variety of storage devices may be attached to the mainframe computer. Businesses that process and store large amounts of data will generally use one or more mainframe compu
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