Professional organizations Abbreviations and Acronyms
- NAHQNational Association for Healthcare Quality
- NAHRSNursing and Allied Resources Section [of the MLA]
- NAHSNational Association for Healthcare Security
- NAINetherlands Architecture Institute
- NAIANational Association of Independent Artists
- NAIAA National Association of Intercollegiate Athletics
- NBANational Bricklayers Association
- NBAOTNew Brunswick Association of Occupational Therapists
- NBBPVINational Board of Boiler and Pressure Vessel Inspectors
- NBCUNational Bureau of Casualty Underwriters
- NBGQANational Building Granite Quarries Association, Inc.
- NBMDANational Building Materials Distribution Association
- NBRANational Bar and Restaurant Association
- NBRANational Basketball Referees Association
- NCANational Constructors Association
- NCANational Cattlemen's Association
- NCANational Confectioners Association
- NCAENational Council of Agricultural Employers
- NCAENorth Carolina Association of Educators, Inc.
- NCARBNational Council of Architectural Registration Boards
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