| Acronym | Meaning |
| EFA | Essential Fatty Acid |
| HC | Hazardous Constituent |
| SSFP | Steady-state Free-precession |
| OBK | Oppenheimer-Brinkman-Kramers (approxn. In Atom-ion Electron-exchange Calcns.) |
| PCB | Printed Circuit Boards |
| HAF | Halogen Acid Furnaces (for Burning Halogenated Wastes |
| IGC | International Geological Congress |
| NPC | Niemann-Pick Type C Disease |
| TDLS | Tunable Diode Laser Spectrometry |
| ICR | Intelligent Optical Character Recognition |