| Acronym | Meaning |
| CRHF | Complex-restricted Hartree-Fock |
| FPC | Fractional Parentage Coeff. (in Group-theor. Calcns.) |
| CCS | Corrected Coupled-states (method For Mol.-scattering Calcns.) |
| GOSAT | Greenhouse Gas Observing Satellite |
| IAM | Internal Axis Method (in Calcns. Of Rotational Excitation In Atom-mol. Collisions) |
| CET | Center For Environmental Technology |
| RC(XI) | (fully) Correlated Relativistic Local-density |
| PDF | Probability-distribution Function |
| BMDL | Below Method Detection Level |
| CDIR | Carbon Dioxide Information Repository |