| Acronym | Meaning |
| PID | Pelvic Inflammatory Disease -Plan Identification Number - Positive Identification - Procedural Identification -Procurement Identification Description |
| VNIR | Visible And Near InfraRed |
| ISLN | International Standard Lawyer Number |
| NRAO | National Radio Astronomy Observatory |
| ROU | Romania (ISO 3166 Trigram) |
| GEL | Georgian Lari (ISO 4217 Currency Code) - Gilbert And Ellice Islands (ISO 3166 Trigram; Obsolete 1977) |
| ABK | Abkhaz Language (ISO 639-2 Code) |
| WCW | World Championship Wrestling |
| OCFS2 | Oracle Cluster File System Release 2 |
| SKC | Clear Sky (METAR Code) |