English abbreviations from nab to nacda
- NAB (Native Acrylamide Bis)
- NABA (North American Broadcasters Association)
- NABCI (North American Bird Conservation Initiative ("nab-see"))
- NABE (National Association of Bilingual Education)
- NABET (National Association of Broadcast Employees and Technicians)
- NABO (North American Boxing Organization)
- NABR (North American Bavarian Racing)
- NABSW (National Association of Black Social Workers)
- NABT (National Association of Biology Teachers)
- NABTS (North American Broadcast Teletext Specification)
- NABV (National Association for Black Veterans)
- NAC (Network access control)
- NACA ((U.S.) National Advisory Committee for Aeronautics (1915–1958, became NASA))
- NACAC (National Association for College Admission Counseling)
- NACASB (National Accreditation Council for Agencies Serving the Blind & Visually Handicapped)
- NACASBVH (National Accreditation Council for Agencies Serving the Blind & Visually Handicapped)
- NACC (North Atlantic Cooperation Council)
- NACD (North Auburn Community Development)
- NACDA (National Association Of Collegiate Directors Of Athletics)