ResourceAccessControlFacility, or RACF in short, is one of the oldest, and probably still the best, commercial Security''''''Software. Unfortunately it is only available from BigBlue and runs on BigIron. See this IbmCorporation page at http://www-1.ibm.com/servers/eserver/zseries/zos/racf/ for more information. ---- CategorySecurity, CategoryEnterpriseComputingConcerns