| Acronym | Meaning |
| GIRMS | Gas Isotope Ratio Mass Spectrometry |
| PBM | Photochem. Box Model |
| TNA | Thermal Neutron Analysis |
| CSACM | Canonical Statistical Adiabatic Channel Model (in Reactions) |
| GHRH | Growth Hormone-releasing Hormone |
| CHRM | Characteristic Remanent Magnetization |
| CEELS | Core Electron Energy Loss Spectroscopy |
| LASE | Lidar Atmospheric Sensing Experiment |
| NLSD | Nonlocal Spin Density (functional Theory) |
| OASIS | Ocean And Atmospheric Sounding Interferometer System |