Of particular interest are the boxes marked "MAXCSRT" and "INFQUEUE". These are, respectively, a stream-to-stream sort component, and a temporary storage component that can be used to store data not being sorted. MAXCSRT was an AMPS component that drove the standard IBM disk Sort, so it had no real file size limits - although of course the number of records to be sorted affected the performance. Sort times could thus be reduced by routing packets that were already sequenced around the Sort - as shown in the diagram. By the way, all components with names starting with MAXC are "off the shelf" (precoded, pretested, application-independent).
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