| Acronym | Meaning |
| CSIA | Compd.-specific Isotope Anal. |
| FPI | Fourier Path Integral |
| IAAD | Ion Assisted Arc Deposition |
| HWSFD | Hazardous Waste Superfund Database |
| EMMA | Energy-dispersive Miniprobe Multielement Analyzer |
| CEPEX | Central Equatorial Pacific Experiment |
| VPSA | Vainshtein-Presnyakov-Sobelman Approxn. (for Excitation In Atom-ion Collisions) |
| ESD | Environmental Services Division (US EPA) |
| PAC | Photoacoustic Calorimetry |
| NDB | Nondefective Bonding |