| Acronym | Meaning |
| CCSD | Coupled Cluster With Single And Double Excitation |
| CBI | Compliance Biomonitoring Inspection |
| ACA | American Crystallographic Association |
| LCFFUA | Linear Combination Of Floating Functions Of United Atom |
| ISO | IR Space Observatory |
| MIR | Mid Infrared |
| NCEH | National Center For Environmental Health |
| NEO | Near-Earth Objects |
| CAG | Carcinogen Assessment Group |
| AAETA | Atomic Spectroscopy With Electrothermal Atomization |