Library /sys$common/syshlp/nclhelp.hlb NCL Introduction, Syntax, Attributes, Counters  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Counters record the number of times the entity performed a
    particular operation or the number of times a certain condition
    or event has occurred since the entity was created. In some
    cases, a counter counts the number of times a similarly named
    event has occurred. Counter values are dynamically maintained by
    the system and cannot be reset by the system manager.