| Acronym | Meaning |
| UFP | Ultrafine Particles |
| OPIT | Oxide Powder In Tube |
| PEAD | Polietileno De Alta Densidad |
| OTTLE | Optically Transparent Thin-layer Electrode |
| CNDO/2-U | Universal CNDO/2 (extended To Full Periodic Table) |
| EFB | Empty Fruit Bunch |
| RVLM | Rostral Ventrolateral Medulla |
| AQDHS | Air Quality Data Handling System |
| DNS | Determination Of Nonsignificance |
| GIST | Gastrointestinal Stromal Tumor |