| Acronym | Meaning |
| NTU | Nephelometric Turbidity Unit |
| NADP | National Atmospheric Deposition Program |
| TNFR1 | Tumor Necrosis Factor Receptor 1 |
| CMIR | Carter Maximum Incremental Reactivity |
| BEI | Backscattered Electron Imaging |
| CSOV | Constrained Space Orbital Variation |
| GIPOF | Graded-Index Plastic Optical Fiber |
| ISTS | Impulsive Stimulated Thermal Scattering [a Laser-based Ultrasonic Technique] |
| BOCV | Biorthogonality Constrained Variation Method |
| DPT | Degenerate Perturbation Theory |