| Acronym | Meaning |
| ASTRAP | Advanced Statistical Trajectory Regional Air Pollution Model |
| ARRPA | Air Resources Regional Pollution Assessment Model |
| MACSIMS | Measurement Of Atmospheric Constituents By Selective Ion Mass Spectrometry |
| CCE | Capacitative Calcium Entry |
| ARDEC | Armament Research |
| TTN | Technology Transfer Network |
| IATA | International Air Transport Association (Geneva |
| LTO | Laguerre-type Orbital (an Ao) |
| NCI | National Cancer Institute |
| EPA | Extended Pair Approxn. (in Elec. Cond. Calcn.) |