| Acronym | Meaning |
| PFT | Pulmonary Functional Test(s) |
| AO | Atomic Orbital |
| MCR | Microcarbon Residue |
| CC-CPA | Charge-correlated CPA |
| DSPB | Distorted-wave Strong-potential Born (approxn.) |
| OSPARCOM | Oslo And Paris Commission [Environmental Regulations For The European Community] |
| NCSRP | National Contaminated Sites Remediation Program |
| NAWDEX | National Water Data Exchange |
| OSEE | Optically Stimulated Electron Emission |
| PADRE | Particle Analysis And Data Reduction Program |