| Acronym | Definition |
|---|
| PNU | Physics News Update |
| PNU | Party of National Unity (Kenya) |
| PNU | Philippine Normal University (Manila, Philippines) |
| PNU | Princess Noura Bint Abdulrahman University (Saudi Arabia) |
| PNU | Pusan National University (Korea) |
| PNU | Payame Noor University |
| PNU | Pharmacia and Upjohn |
| PNU | Protein Nitrogen Units |
| PNU | Polish National Union |
| PNU | Parc Naturel Urbain (French) |
| PNU | Position Navigation Unit |
| PNU | Partai Nahdlatul Ummat (Indonesia) |
| PNU | Precision Navigation Upgrade |
| PNU | Particular Nutritional Uses |
| PNU | Prenatal Ultrasound |
| PNU | Precision Navigation Unit (HARM upgrade) |
| PNU | Principality of New Utopia |
| PNU | Photo Net Union |
| PNU | Palestine News Update |
| PNU | Prenatal Ultrasonography |
| PNU | Planck's Natural Units |
| PNU | Pique-Niques Urbains (French) |
| PNU | Praktischer Natur- und Umweltschutz (German) |
| PNU | Patientnamnden Uddevalla (Swedish) |