| Acronym | Meaning |
| EORCU | European Ozone Research Coordinating Unit |
| ISI | Information Systems Inventory |
| CTB | Computer Technology Branch |
| CVM-CI | Constrained Variational Method-CI |
| DME | Dropping Mercury Electrode |
| LEPS | London-Eyring-Polanyi-Sato (potential-energy Surface) |
| USAN | US Adopted Names (for Drugs) |
| OWRS | Office Water Regulations And Standards (US EPA) |
| LOD | Loss On Drying |
| FORS | Fully Optimized Reaction Space |