| Acronym | Meaning |
| EDRF | Endothelium-derived Relaxing Factor |
| LIPM | Laser Integrating Plate Method |
| ISG | International Stratigraphic Guide |
| ROD | Record Of Decision |
| BEIS | Biogenic Emissions Inventory System (US EPA) |
| ACR | Advanced Cracking Reactor (for Ethylene Production From Petroleum) |
| MLT | Magnetic Local Time |
| TENR | Technologically Enhanced Natural Radioactivity |
| EH | Extended Hueckel |
| ARC | Accelerating Rate Calorimetry |