| Acronym | Meaning |
| APEX | Active Plasma Experiment Satellite |
| WEP | Weak Equivalence Principle |
| EIRFT | Extended Inversion-recovery Fourier Transform |
| FTNMR | Fourier-transform Nuclear Magnetic Resonance |
| ICON | International Council On Nanotechnology |
| SIC | Standard Industrial Classification |
| ASM | Advanced Scavenging Model (for Air Pollution) |
| IEG | Immediate Early Gene |
| OB/OD | Open Burn/open Detonation |
| SOP/ED | Split-operator Propagator (for) Electronically Diabatic (phenomena) |