| Acronym | Meaning |
| ASO | Atomic Spin Orbital |
| CPSS | Coulomb-repulsion Perturbed Stationary State |
| YFEGE | Yonei Free-electron-gas Exchange |
| TPAD | Temperature-phased Anaerobic Digestion |
| CR | Collocation Representation (of Basis Sets) |
| MWEP | Monofilled Waste Extraction Procedure |
| IPS | Inverse Photoemission Spectroscopy |
| PACAP | Pituitary Adenylate Cyclase-activating Polypeptide |
| TARIS | Thermal Atomization Resonance Ionization Spectrometry |
| NSSDC | National Space Science Data Center |