| Acronym | Meaning |
| PPHM | Parts Per Hundred Million |
| ABC | Absorbing Boundary Condition (green Function) |
| TPO | Thermoplastic Polyolefin |
| HF | Heart Failure |
| PSFT | Progressive Saturation Fourier Transform |
| BAL | Broad Absorption Line |
| NIMS | Negative Ion Mass Spectrometry |
| TASO | Terminal Atom Symmetry Orbital |
| TIG | Tungsten Inert Gas (welding) |
| WRC | Water Resources Council |