| Acronym | Definition |
|---|
| IPN | Instituto Politecnico Nacional (National Polytechnic Institute, Mexico) |
| IPN | Instant Payment Notification (PayPal) |
| IPN | International Preservation News (International Federation of Library Associations and Institutions) |
| IPN | Infectious Pancreatic Necrosis |
| IPN | Instant Payment Notification |
| IPN | Internet Phone Number |
| IPN | Internet Protocol Number |
| IPN | Interplanetary Internet |
| IPN | Inter Platform Network |
| IPN | Ip Network |
| IPN | International Policy Network (est. 2001) |
| IPN | Interplanetary Network |
| IPN | Interplanetary Internet (JPL) |
| IPN | Interpenetrating Polymer Networks |
| IPN | Intellectual Property Network (IBM) |
| IPN | Instytut Pamieci Narodowej (Polish: Institute of National Remembrance) |
| IPN | I'm Posting Naked |
| IPN | Internet Protocol Network (computing) |
| IPN | Institut Pédagogique National (French: National Pedogogical Institute) |
| IPN | International Programming Network |
| IPN | Idemitsu Petroleum Norge (Norwegian petroleum company) |
| IPN | Inventor Presentation (animated file) |
| IPN | Installation Processing Node (US DoD) |
| IPN | Intelligent Packet Network |
| IPN | Isophthalonitrile |
| IPN | Impulse Noise |
| IPN | Info Pool Network |
| IPN | Iowa Prairie Network |
| IPN | Integrated Packet Network |
| IPN | Intelligence Processing Network |
| IPN | Iso-Propyl Nitrate |
| IPN | Information Processing Network |
| IPN | Initial Physical Notification (UK) |
| IPN | Ideal Proportional Navigation |
| IPN | Intern Progress Note |
| IPN | Intel Part Number |
| IPN | Internal Point Name (Megasys) |