Mainframe computers are large-scale systems designed for processing and storing huge amounts of data that smaller systems such as PCs can’t handle. They are frequently used by extremely large companies, banks and government agencies that have enormous processing and storing needs, and can handle hundreds of users at the same time. Named for the framework on which the computers used to be hung, mainframes are also known as “big iron” and have continued to adapt and evolve beyond their original limitations to keep pace with technological advancement.
