Industry: 9711—National Security
Establishments of the armed forces, including the National Guard, primarily engaged in national security and related activities. Establishments primarily engaged in manufacturing ordnance, ships and other military goods are classified in Manufacturing, Division D. Service academies are classified in Services, Industry 8221, but military training schools are classified here. Military hospitals are classified in Services, Industry Group 806. Establishments of the Coast Guard primarily engaged in the administration, operation, or regulation of transportation are classified in Industry 9621.

Air ForceMilitary training schools
ArmyNational Guard
Marine CorpsNavy
Codes Titles Number of US Businesses
9711National Security13,639
971100National security1,335
97110000National security1,335
971104National security, level of government518
97110400National security, level of government16
97110401National security, Federal government329
97110402National security, State government116
97110403National security, County government22
97110404National security, Local government35
971199National security, nec11,786
97119901Air Force2,382
97119903Civil Defense483
97119904Marine Corps1,303
97119905Military training schools143
97119906National Guard2,322