| Abbreviation | Definition |
|---|---|
| NCS | Net Collectors Society |
| NCS | Nordic Catalysis Society |
| NCSA | North Central Sociological Association |
| NCSEA | National Council of Structural Engineers Associations |
| NCSG | North Carolina Society of Gastroenterology |
| NCSH | North Carolina Society of Historians |
| NCSHP | North Carolina Society of Hispanic Professionals |
| NCSP | North Carolina Society of Pathologists |
| NCSP | North Carolina Society of Perfusionists |
| NCSS | National Conference of State Societies |
| NCSS | North Carolina Society of Surveyors |
| NCSS | North Carolina Spine Society |
| NDAS | National Democratic Action Society |
| NDCS | national daef children society |
| NDCS | National Deaf Childrens Society |
| NDCS | National Deaf Children's Society |
| NDSO | Newcastle and District Society of Organists |
| NDSS | National Down Syndrome Society |
| NDST | Neurodegenerative Disease Society of Toronto |
| NEACT | New England Association of Chemistry Teachers |