| Acronym | Definition |
|---|
| PNG | Portable Network Graphics (graphic file standard/extension) |
| PNG | Papouasie Nouvelle Guinée (French: Papua New Guinea) |
| PNG | Papua New Guinea |
| PNG | Plano Nacional de Graduaçao (Portuguese: National Graduate; Brazil) |
| PNG | Pennsylvania National Guard (est. 1747) |
| PNG | Persona Non Grata |
| PNG | Project Next Generation (various organizations) |
| PNG | Portable Network Graphics |
| PNG | Professional Numismatists Guild |
| PNG | Pacific Northern Gas Ltd. (Canada) |
| PNG | Peer Networking Group (various locations) |
| PNG | Pipeline Natural Gas |
| PNG | Pawnee National Grassland |
| PNG | Private, Non-Governmental |
| PNG | Program on Networked Governance (Harvard University; Cambridge, MA) |
| PNG | Personaggio Non Giocante (Italian) |
| PNG | Pressurized Natural Gas |
| PNG | Private Non-Guaranteed (bond) |
| PNG | Passive Night Goggles |
| PNG | PNGs Not GIF |
| PNG | Park 'n' Grab (geocaching) |
| PNG | Pencil Necked Geek |
| PNG | Proportional Navigation Guidance Law |
| PNG | Pencil Notes on Gum (philatelic imperfection) |
| PNG | Pseudorandom Noise Generator |