In this section we give a recount of all types of systems as discussed in the
former section. When of a certain system various models are available, we will
discuss them all at once. So, for instance, we will discuss Convex systems
under
one entry, SM-MIMD systems, even if a one-processor model of such a system
strictly should be discussed under the SM-SIMD heading. We rather regard such
systems a special cases of a general product line.