SISDSISD stands for 'Single Instruction and Single Data Stream'. It represents the organization of a single computer containing a control unit, a processor unit, and a memory unit. Instructions are executed sequentially, and the system may or may not have internal parallel processing capabilities. Most conventional computers have SISD architecture like the traditional Von-Neumann computers. Parallel processing, in this case, may be achieved by means of multiple functional units or by pipeline processing. ![]() Instructions are decoded by the Control Unit and then the Control Unit sends the instructions to the processing units for execution. Data Stream flows between the processors and memory bi-directionally. Examples: Older generation computers, minicomputers, and workstations
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