| Acronym | Definition |
|---|
| PSN | Playstation Network (gaming) |
| PSN | Position |
| PSN | Project Safe Neighborhoods |
| PSN | Product Serial Number |
| PSN | Poison |
| PSN | Processor Serial Number (Intel Pentium III) |
| PSN | Packet Switched Network |
| PSN | Piano Sanitario Nazionale (Italian: National Health Plan) |
| PSN | Public Services Network (UK) |
| PSN | Proper Shipping Name (hazardous materials) |
| PSN | Picture Services Network |
| PSN | Packet Sequence Number |
| PSN | Packet Switch Node |
| PSN | Packet Switching Network |
| PSN | Processor Serial Number |
| PSN | Personal Serial Number |
| PSN | Panasonic System Networks Co., Ltd. (est. 2010) |
| PSN | Production Services Network (gas/oil services company; Aberdeen, Scotland) |
| PSN | Public Switched Network |
| PSN | Provider Service Network |
| PSN | Private Sector Network (business network) |
| PSN | Pharmaceutical Society of Namibia |
| PSN | Parti Socialiste Neuchâtelois (Swiss socialist party) |
| PSN | Partido de la Sociedad Nacionalista (Spanish: Party of the Nationalist Society) |
| PSN | Progressive States Network (politics) |
| PSN | Patient Safety News (US FDA) |
| PSN | Panamerican Sports Network |
| PSN | Power Sports Network (Wisconsin) |
| PSN | People Search News |
| PSN | Peripheral Sensory Neuron (cells) |
| PSN | Presacral Neurectomy |
| PSN | Packet Switching Node |
| PSN | Pancreatitis Supporters Network (United Kingdom) |
| PSN | Park Slope Neighbors (advocacy; New York) |
| PSN | Provider Sponsored Network |
| PSN | Partido da Solidariedade Nacional |
| PSN | Pobalscoil Neasáin (Irish school) |
| PSN | Partido Solidarista Nacional (Brazil political party) |
| PSN | Professional Services Network, Inc (Silver Spring, MD) |
| PSN | Processing Sequence Number |
| PSN | Promote Safe Navigation (US NOAA) |
| PSN | Personal Service Network |
| PSN | Polygonal Switching Network |
| PSN | Primary Service Node |
| PSN | Pending Shipping Notice (shipping) |
| PSN | Pre-Solicitation Notice (US Department of Interior; National Park Service) |
| PSN | Parallel Staging Network (global ballistic missile defense) |
| PSN | Personal Software Network |
| PSN | Promotion Sequence Number |
| PSN | Plansoft Network |
| PSN | Position Switched Network |
| PSN | Probability, Stress, Number of Life Cycles |
| PSN | Property Sheet Notification (Microsoft Windows programming) |