These are extremely fast computers, which can execute hundreds of millions of instructions per second. Software technology is different from minicomputers. Mainframe computers are also multi-user computer systems, capable of supporting hundreds of users simultaneously designed to be used in large firms and organizations where a lot of people have to work on the same database. These come under multiple user computer systems that are capable of holding hundreds of users simultaneously. This type of system is not convenient for carrying from one place to another. They are often designed for self-use by an individual and can be used for multiple purposes. Workstations usually come with a high-resolution graphics screen, inbuilt network support, a large amount of RAM, and a graphical user interface. Regularly a single user system is named a workstation. This type of computer can easily be moved from one place to the other comprising a personal storage unit, input & output unit, and a Central Processing Unit. These are single-user computer systems having small, relatively reasonable computers designed for an individual user.
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