An identifier generated by an SNA control point (CP) to (a) correlate search, activation, and deactivation requests and responses related to a specific session between logical units (LUs), and (b) identify this session for such purposes as problem determination, accounting, and performance monitoring. The PCID and the network-qualified name of the CP generating the PCID constitute the fully qualified procedure correlation identifier (FQPCID), which is unique across the network in which it is used.