| NGA | National Gallery of Art 
| Others |
| NGA | National Gallery of Australia
| Others |
| NGA | National Gardening Association
| Others |
| NGA | National Gay Association
| Others |
| NGA | National Geographic Amateurs
| Others |
| NGA | National Geospatial-Intelligence Agency
| Others |
| NGA | National Gerbil Association
| Others |
| NGA | National Glass Association
| Others |
| NGA | National Governance Association
| Others |
| NGA | National Governors Association
| Others |
| NGA | National Governors' Association
| Others |
| NGA | National Greyhound Association
| Others |
| NGA | National Grocers Association
| Others |
| NGA | National Guardianship Association
| Others |
| NGA | National Gym Association
| Others |
| NGA | Nature Games Art
| Others |
| NGA | Nebraska Golf Association
| Others |
| NGA | Needlework Guild of America
| Others |
| NGA | Negative-Gene-Altered
| Others |
| NGA | New Gen Anime
| Others |
| NGA | New Generation Alliance
| Others |
| NGA | New Global Architecture
| Others |
| NGA | Next Generation Academy
| Others |
| NGA | Next Generation Access
| Others |
| NGA | Next Generation Access Network
| Others |
| NGA | Next Generation Airplanes
| Others |
| NGA | Next Generation Analyzer
| Others |
| NGA | Next Generation Attenuation
| Others |
| NGA | Next Generation Attenuation model
| Others |
| NGA | Next-generation access
| Others |
| NGA | Niles Guichet Associates
| Others |
| NGA | Nissan Global Award
| Others |
| NGA | No Geometric Adjustments
| Others |
| NGA | No Girls Allowed
| Others |
| NGA | Node Gate Array
| Others |
| NGA | Non Genotoxic Alert
| Others |
| NGA | Non-Genotoxic Alert
| Others |
| NGA | Non-Governmental Agency
| Others |
| NGA | Nonseparable Gradient Approximation
| Others |
| NGA | Northeast Gas Association
| Others |
| NGA | Nouvelle Gamme Alpine
| Others |
| NGA | Young, New South Wales, Australia
| Others |