| Acronym | Meaning |
| AAAS | American Association For The Advancement Of Science |
| STM | Space-translation Method (in Atomic Collision Calcn.) |
| FIDA | Fluorescence Intensity Distribution Analysis |
| BLCAO | Bilinear Combination Of Atomic Orbitals |
| RITE | Research Institute Of Innovative Technology For The Earth (Japan) |
| GW-PG | Gaussian-weighted Planar Grid (method In Calcns. Of Electron-momentum Distributions) |
| RCT | Reference Control Technology |
| SSF | Space Station Freedom |
| BOD | Biochemical Oxygen Demand |
| HSPF | Hydrological Simulation Program-Fortran |