An installation can specify whether the individual commands in a TSO/E CLIST are treated as separate TSO/E commands for transaction control. Specifying CNTCLIST=YES causes a new transaction to be started for each command in the CLIST. A possible exposure of specifying CNTCLIST=YES is that long CLISTs composed of trivial and intermediate commands might monopolize a domain's MPL slots and cause interactive terminal users to be delayed. Specifying CNTCLIST=NO (the default) causes the entire CLIST to constitute a single transaction.