Your PRPC engine can operate in a distributed mode, running simultaneously on more than one server. Each server hosting the PRPC rules engine software (but sharing one system name) is known as a node.
Externally, the node name is the same as the server name (machine name) on the network. (An internal identifier known as the Node ID is more granular.)
The System data instance (Data-Admin-System type) defines characteristics of the entire system or cluster.
The Systems and Nodes report identifies all nodes participating in your system now or at any time in the last 90 days. To see this report, open and run the standard list view rule System-Status-Nodes.SystemNodeDetails.ALL.