| Acronym | Meaning |
| RPEHMO | Relativistically Parametrized Extended Hueckel MO |
| CPEO | Chronic Progressive External Ophthalmoplegia |
| STOL | Short Take-Off And Landing |
| NACSN | North American Commission On Stratigraphic Nomenclature |
| RITG | Radiatively Important Trace Gases |
| START | Strategic Arms Reduction Treaty |
| DCB | Double-cantilever Beam |
| CCL | Drinking Water Contaminant Candidate List |
| ERP | Event-related Potential |
| AABW | Antarctic Bottom Water |