| Acronym | Meaning |
| ROSAT | Roentgen Satellite |
| AMPD | 2-amino-2-methyl 1 |
| SALCCSD | Spin-adapted Linear Coupled-cluster (with) Single And Double Excitations) |
| IMS | Incomplete Model Space (in Many-body Calcns.) |
| IFAS | Integrated Fixed-film Activated Sludge |
| GOES | Geostationary Operational Environmental Satellite |
| ADH | Antidiuretic Hormone |
| ROSE | Residual Oil Supercritical Extraction |
| CS | Compton Scattering |
| ASTM | American Society For Testing And Materials |