| Acronym | Meaning |
| SANDS | Stratospheric Aitken Nuclei Detection System |
| RUDAD | RUmen-Derived Anaerobic Digester |
| PSCI | Partitioned (orbital Hessian) Super-configuration Interaction |
| PHDF | Polyhalogenated Dibenzofuran(s) |
| BACT | Best Available Control Technology |
| HQM | Hemiquantal Mechanics (in Mol. Calcns.) |
| GGWPD | Generalized Gaussian Wave-packet Dynamics |
| SSME | Space Shuttle Main Engine |
| MQO | Measurement Quality Objective |
| TPN | Total Parenteral Nutrition |