This document discusses different types of computers including microcomputers, mainframes, and supercomputers. It defines a microcomputer as an electronic device with a microprocessor as its central processing unit (CPU), and notes that microcomputers were formerly used to refer to personal computers. Mainframes are described as computers used by large organizations for critical applications and bulk data processing. Supercomputers are defined as having a high level of performance compared to general-purpose computers, with their speed measured in floating-point operations per second rather than million instructions per second. The document concludes by stating that as of November 2020, Fugaku, located in Japan, is the world's fastest supercomputer.
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