The definition of a Standard Processor must necessarily be rather vague as it has to cover a wide range of operations. We define a Standard Processor as a top level SU that performs some operation on the data structure. From the user's point of view, Standard Processors are the tools that are assembled and used to perform the required analysis. Typically they add new banks to an existing data structure but they may also transport the structure between memory and external medium or simply determine its status.