NSG may stand for: . Businesses. Nippon Sheet Glass, a Japanese glass manufacturer. NetWare Systems Group, Novell's defunct operating system division. Government and military. National Security Guard, a federal counterterrorism force in India. National Street Gazetteer, a database of all streets in England and Wales. Naturschutzgebiet, a nature protection category in Germany. Nebraska State Guard, active during World War II and the Vietnam War. Nordic Support Group, a multinational peacekeeping force. Nuclear Suppliers Group, an international export regulation body. Places.
https://en.wikipedia.org/wiki/NSG