English abbreviations from na to naag
- 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)