In computing, SISD (Single Instruction, Single Data) is a term referring to an architecture in which a single processor, an uniprocessor, executes a single instruction stream, to operate on data stored in a single memory.Corresponds to the von Neumann architecture.

According to Flynn, SISD can have concurrent processing characteristics. Instruction fetching and pipelined execution of instructions are common examples found in most modern SISD computers.

[Quinn, Michael J. "Chapter 2: Parallel Architectures." Parallel Programming in C with MPI and OpenMP.Boston: McGraw Hill, 2004. ISBN 0-07-282256-2] [Ibaroudene, Djaffer. "Parallel Processing, EG6370G: Chapter 1, Motivation and History." St. Mary's University, San Antonio, TX. Spring 2008.]


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