| Acronym | Meaning |
| ACID | Acidification Chemistry Information Database |
| ICAT | Isotope-coded Affinity Tag |
| IFAS | Integrated Fixed-film Activated Sludge |
| STP | Slater-transform-preuss (wave Functions) |
| HI | Hinkley Index |
| AAOM | American Academy Of Occupational Medicine |
| CMBR | Cosmic Microwave Background Radiation |
| ISG | International Stratigraphic Guide |
| APSG | Antisymmetrized Product Of Spin Geminals Method |
| RPJ | Radio-frequency Plasma Jet |