| Acronym | Meaning |
| UCCSD | (spin) Unrestricted CCSD |
| HD | Hydrogen Damage |
| CMO | Complex Molecular Orbital Method |
| LPP | Laser-produced Plasma |
| UFL | Upper Flammable Limit |
| ALIPS | Automated Laser-Induced Phosphorimeter System |
| IAG | International Association Of Geodesy |
| ICPP | Idaho Chemical Processing Plant |
| VCC-IOS | Vibrational Close-coupling-(rotational) Infinite-order Sudden (for Inelastic Mol. Collisions Calcns.) |
| PAB | Particle Associated Bacteria |