| Acronym | Meaning |
| AWS | American Welding Society |
| ELRA | Enzyme-linked Receptor Assay |
| GWM | Groundwater Monitoring |
| LCAO LSD | Linear Combination Of Atomic Orbitals-local Spin Density |
| NDA | Nondestructive Assay |
| HBOC | Hereditary Breast-ovarian Cancer |
| EPA | Extended Pair Approxn. (in Elec. Cond. Calcn.) |
| FELIX | Free Electron Laser For Infrared Experiments |
| DIOA | Diisooctyl Adipate |
| RCP | Reciprocal Calcn. Procedure [of ACGIH] |