| Acronym | Meaning |
| EBIR | Energy Based Integral Retention (in Electronic-structure Calcns.) |
| ERBE | Earth Radiation Budget Experiment |
| IRI | International Reference Ionosphere |
| GCR | Galactic Cosmic Rays (spacecraft Orbit) |
| LDFT | Local Density-functional Theory |
| EPM | Empirical Pseudopotential Method |
| TIA | Transient Ischemic Attack |
| APFIM | Atom Probe Field Ion Microscopy |
| LIPAS | Laser Induced Photoacoustic Spectroscopy |
| CESQG | Conditionally Exempt Small Quantity Generator |