| Acronym | Definition |
|---|
| NNS | NASCAR Nationwide Series |
| NNS | Number Needed to Screen (healthcare) |
| NNS | Neural Network Simulator |
| NNS | Non-Native Species |
| NNS | Netware Name Service |
| NNS | Network Node Server |
| NNS | Nippon Television Network System (Japan) |
| NNS | Newport News Shipbuilding |
| NNS | National Numeracy Strategy |
| NNS | Northern North Sea (basin) |
| NNS | Norfolk Naval Shipyard (Portsmouth, VA) |
| NNS | Nonproliferation and National Security |
| NNS | Novosadska Novinarska Skola (Serbian journalism school) |
| NNS | Non-Native Student |
| NNS | Non-Native Speaking |
| NNS | Newhouse News Service |
| NNS | Nmap Network Scanning (open source utility; Nmap Security Scanner) |
| NNS | Nashville Numbering System (sheet music) |
| NNS | Network Node Server (Cisco) |
| NNS | New Neoclassical Synthesis (economics) |
| NNS | NoNameScript (gaming) |
| NNS | National Natality Survey |
| NNS | National Nutritional Survey |
| NNS | Neighborhood Nuclear Superiority (Michael Nesmith) |
| NNS | Northern Neck Solutions, Inc (Kilmarnock, VA) |
| NNS | Non-Nerve Sparing |
| NNS | Network Name Services (Nortel) |
| NNS | Nantucket New School (Nantucket, MA) |