Library /sys$common/syshlp/pca$help.hlb EXIT, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    When you enter the EXIT command at the terminal, the session ends
    and you return to DCL level. You can also enter CTRL/Z to end the
    session.

    When PCA executes an EXIT command in a command procedure, control
    returns to the command stream that invoked the command procedure.
    This command stream may be the terminal or a previous command
    procedure.