PN
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| PN | Planetary Nebula | - | Atmospheric Research Center |
| PN | Part Number (P/N Preferred) | - | Organizations |
| PN | Pseudo Noise | - | Organizations |
| PN | Pseudo-Random Noise | - | Organizations |
| PN | Petanewton - Pitcairn Islands (ISO 3166 Digram) | - | Astronomy |
| PN | Piconewton | - | Astronomy |