| Acronym | Meaning |
| LMP | Laser Microprobe |
| ARIAP | Acid Rain Impact Assessment Program |
| ECP | Exponential Corrugated Potential |
| SNIFTIRS | Subtractively Normalized Interfacial Fourier Transform IR Spectroscopy |
| OBK3 | Third-order Oppenheimer-Brinkman-Kramers |
| EXOSAT | European X-ray Observatory Satellite |
| UNO-CAS | Unrestricted Natural Orbital-complete Active Space |
| DOCKET | Enforcement Docket |
| AFC | Automatic Frequency Control |
| ACL | Alternative Concentration Limit |