| Acronym | Meaning |
| RA | Reduced Aggregate (interplanetary Dust Particle) |
| SAC-CI | Symmetry-adapted Cluster Configuration Interaction (theory For Wave-function Expansion) |
| DAFS | Diffraction Anomalous Fine Structure |
| SEP | Standard Error Of Prediction |
| SDRAM | Synchronous Dynamic Random Access Memory |
| AP | Appearance Potential |
| HPMS | Highway Performance Monitoring System |
| OSRD | Office Of Scientific Research And Development |
| IKES | Ion-kinetic-energy Spectroscopy |
| MCQDT | Multichannel Quantum Defect Theory |