| NSG | Nagercoil Ganesa Iyer 
| Others |
| NSG | Nantes Sports de Glace
| Others |
| NSG | Narrowband Services Gateway
| Others |
| NSG | Natation Sportive Geneve
| Others |
| NSG | National Sales Group
| Others |
| NSG | National Salvage Group
| Others |
| NSG | National Scaffolding Group
| Others |
| NSG | National Security Guard
| Others |
| NSG | National Security Guards
| Others |
| NSG | National Service Group, Inc.
| Others |
| NSG | National Society for Histotechnology
| Others |
| NSG | National Statuary Hall
| Others |
| NSG | National Street Gazetteer
| Others |
| NSG | National System for Geospatial
| Others |
| NSG | National System For Geospatial Intelligence
| Others |
| NSG | Native Speaker of German
| Others |
| NSG | Naval Support Group
| Others |
| NSG | Naval Surface Gun
| Others |
| NSG | Near Surface Geophysics
| Others |
| NSG | Nelson Speleological Group
| Others |
| NSG | Netscaler Gateway
| Others |
| NSG | Network Security Group
| Others |
| NSG | Network Security Groups
| Others |
| NSG | Network Services Group
| Others |
| NSG | Network Systems Group
| Others |
| NSG | Neuro-Sino Gram
| Others |
| NSG | Neutral States Group
| Others |
| NSG | New Socialist Group
| Others |
| NSG | Nigeran Slash Ghanaian
| Others |
| NSG | Nippon Sheet Glass
| Others |
| NSG | No Sleep Gang
| Others |
| NSG | No Sphere Grid
| Others |
| NSG | No Such Group
| Others |
| NSG | NOD scid gamma
| Others |
| NSG | Non stop Gaming
| Others |
| NSG | Non Stop Grip
| Others |
| NSG | North-Seeking Gyro
| Others |
| NSG | Northampton School for Girls
| Others |
| NSG | Not So Good
| Others |
| NSG | Not So Great
| Others |
| NSG | Notice Support Group
| Others |
| NSG | Nuclear SELLERS Group
| Others |
| NSG | Nuclear Supplier Group
| Others |
| NSG | Nuclear Suppliers Group
| Others |
| NSG | Nuclear Supply Group
| Others |
| NSG | Nursing
| Others |