English abbreviations from na to nab
- NA (Narcotics Anonymous)
- NA24 (Radioactive Sodium)
- NAA (N-Acetylaspartate)
- NAAA (Naval Academy Athletic Association)
- NAACL (National Assessments of Adult Literacy)
- NAACLS (National accrediting agency for clinical laboratory science)
- NAACP (National Association for the Advancement of Colored People ("N double-A CP"))
- NAACP LDEF (National Association for the Advancement of Colored People Legal Defense and Education Fund)
- NAACP SCF (National Association for the Advancement of Colored People Special Contribution Fund)
- NAAD (North American Air Defense)
- NAADA (National Association of Alcoholism and Drug Abuse Counselors)
- NAAE (National Association of Alternative Educators)
- NAAF (National Alopecia Areata Foundation)
- NAAFA (National Association To Advance Fat Acceptance)
- NAAFI (Navy Army And Air Force Institutes)
- NAAG (North American Archery Group)
- NAAK (Mark I NAAK, Nerve Agent Antidote Kit)
- NAAL (Norton Anthology of American Literature)
- NAAMA (National Association Of Ancient And Medieval Arts)
- NAANSD (National Association of Anorexia Nervosa and Associated Disorders)
- NAAQS (National Ambient Air Quality Standards)
- NAAR (National Alliance for Autism Research)
- NAARS (Nottingham Anti-Animal Racing Society)
- NAASCA (National Association of Adult Survivors of Child Abuse)
- NAAWP (National Advancement Association of White People)
- NAAWS (NATO Anti-Air Warfare System)
- NAB (Native Acrylamide Bis)