Ambiguous abbreviation of command and statement names

Entering an abbreviated command or statement name followed by a question mark produces a selection menu containing all possible matching commands or statements.
Any characters after the question mark are ignored.
If the abbreviation matches exactly one command or statement, the operand form is displayed, and characters after the question mark are taken over as operand specifications. If there is no matching command or statement, an error message is displayed.

Quitting the selection menu with *EXIT, *EXIT-ALL, *CANCEL or the corresponding function keys in guided dialog effects a return to the application domain menu or statement menu. A temporary dialog is terminated.