| Acronym | Meaning |
| ETAAS | Electrothermal Atomic Absorption Spectrometry |
| MPL | Maximum Permitted Level |
| COS | Cosmic Origins Spectrograph |
| IDMS | Integrated DWPF Melter System |
| SPARC | Secreted Protein Acidic And Rich In Cysteine |
| HFP | Hartree-Fock (plus) Pauli (terms) |
| ESE | Exact Static-exchange (approxn. In Scattering Calcns.) |
| TOTE | Tropical Ozone Transport Experiment |
| RCNDO | Rydberg CNDO |
| BCO | Bounded Crystal Orbital |