| Acronym | Meaning |
| CDIAC | Carbon Dioxide Information Analysis Center |
| LGM | Last Glacial Maximum (most Recent Era Of Continental Glaciation; See Also PGP) |
| AHM | Average Hamiltonian Model Method |
| TEMIS | Total Emissions Model For Integrated Systems |
| OLPGAA | On-line Prompt Gamma-ray Activation Analysis |
| WMTADS | Waste Management Technology Analysis Decision Support |
| IMSS | International Mass Spectrometry Society |
| PTC | Phase Transfer Catalysis |
| ESSP | Earth Systems Science Pathfinder |
| IBAD | Ion-Beam-Assisted Deposition |