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of independent values, the systolic array is definitely not [[SISD]]. Since these [[input (computer science)|input]] values are merged and combined into the result(s) and do not maintain their [[independence]] as they would in a [[SIMD]] vector processing unit, the [[array data structure|array]] cannot be classified as such. Consequently, the array cannot be classified as a [[MIMD]] either, because MIMD can be viewed as a mere collection of smaller SISD and [[SIMD]] machines.
Finally, because the data [[swarm]] is transformed as it passes through the array from [[Node (computer science)|node]] to node, the multiple nodes are not operating on the same data, which makes the MISD classification a [[misnomer]]. The other reason why a systolic array should not qualify as a '''MISD''' is the same as the one which disqualifies it from the SISD category: The input data is typically a vector not a '''s'''ingle '''d'''ata value, although one could argue that any given input vector is a single
In spite of all of the above, systolic arrays are often offered as a classic example of MISD architecture in textbooks on [[parallel computing]] and in the engineering class. If the array is viewed from the outside as [[atomic operation|atomic]] it should perhaps be classified as '''SFMuDMeR''' = Single Function, Multiple Data, Merged Result(s).
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