/sys$common/syshlp/helplib.hlb SHOW, CPU, Qualifiers, /SUMMARY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Produces a display listing the processors in the OpenVMS
    multiprocessing or single-CPU system, indicating which is the
    primary processor, which processors are configured, and which
    processors are active. The /SUMMARY qualifier also indicates the
    minimum revision levels required for processors in the system,
    which OpenVMS synchronization image has been loaded into the
    operating system, and whether multiprocessing is enabled. If
    the presence of one or more uniprocessing drivers in the system
    prohibits the enabling of multiprocessing, the SHOW CPU command
    displays a warning message.