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

    The SHOW AST command indicates whether delivery of ASTs is
    enabled or disabled. The command does not identify an AST whose
    delivery is pending. The delivery of ASTs is enabled by default
    and with the ENABLE AST command. The delivery of ASTs is disabled
    with the DISABLE AST command.

    Related commands:

       (ENABLE,DISABLE) AST