| Acronym | Definition |
|---|
| PTN | Partition Number |
| PTN | Perguruan Tinggi Negeri (Indonesian: state university) |
| PTN | Pleiotrophin |
| PTN | Parent Teacher Network (various organizations) |
| PTN | Pro Travel Network |
| PTN | Polskie Towarzystwo Neurologiczne (Polish: Polish Society of Neurology) |
| PTN | Public Telephone Network |
| PTN | Packet Transport Network (computer networking) |
| PTN | Primary Transit Network (various locations) |
| PTN | Personal Telephone Number |
| PTN | Public Telecommunications Network |
| PTN | Private Telecommunications Network |
| PTN | Post Tender Negotiation |
| PTN | Parallels Technology Network |
| PTN | Paint The Night |
| PTN | Poker Training Network (Dallas, TX) |
| PTN | Preservation Trades Network, Inc. |
| PTN | Private Trading Network |
| PTN | Pyramidal Tract Neuron |
| PTN | Part Time Ninja |
| PTN | Photonic Transport Network (IEEE) |
| PTN | Personal Telecommunications Number Service |
| PTN | Product Technical Note |
| PTN | Person to Notify |
| PTN | Product Termination Notice |
| PTN | Product Transfer Notes |
| PTN | Portable Telephone Number |
| PTN | Patrolman/Patrolwoman (law enforcement title) |
| PTN | Problem Tracking Notification |