National Advisory Committee for Aeronautics | National Advisory Committee on Aeronautics |
National Association of Underwater Instructors | National Association of Underwater Instructors |
National Basketball Association | National Basketball Association |
National Broadcasting Company | NBC |
National Center for Biotechnology Information | National Center for Biotechnology Information |
National Collegiate Athletic Association | NCAA |
National Football Conference | National Football Conference |
National Football League | National Football League |
National Gallery | National Gallery |
National Gallery of Art | National Gallery of Art |
National Gallery of Scotland | National Gallery of Scotland |
National Geographic Society | National Geographic Society |
National Hockey League | National Hockey League |
National Hockey League Players Association | NHLPA |
National Reconnaissance Office | National Reconnaissance Office |
National Rifle Association | National Rifle Association |
National Security Agency | National Security Agency |
National socialist black metal | NSBM |
National television system committee | National Television Standards Committee |