| Acronym | Meaning |
| ICAM | Integrated Climate Assessment Model |
| IPM | Independent Particle Model |
| DPFGSE | Double Pulse Field Gradient Spin Echo |
| ANPRM | Advance Notice Of Proposed Rulemaking |
| IIRS | Ion Impact Radiation Spectroscopy |
| HIIS | Heavy Ions In Space |
| TNAA | Thermal Neutron Activation Analysis |
| RDA | Regularized Discriminant Analysis |
| SLPM | Standard Liters Per Minute |
| NQCC | Nuclear Quadrupole Coupling Constants |