| Acronym | Meaning |
| CHORTLE | Carbon-hydrogen Correlation From One-dimensional Polarization-transfer Spectra By Least-squares Analysis |
| CV | Core-valence Correlation |
| SNPS | Space Nuclear Power System |
| HFPT | Hartree-Fock Perturbation Theory |
| BNA | Bureau Of National Affairs |
| QC-SCF | Quadratically Convergent SCF (for Closed-shell Systems) |
| APD | Action Potential Duration |
| ROD | Record Of Decision |
| CDOM | Chromophoric Dissolved Organic Matter |
| SIG | Special Interest Group |