| Acronym | Meaning |
| GIOS | Generalized Infinite Order Sudden |
| ACL | Average Contaminant Level |
| MF | Modifying Factor (in Oral RfD) |
| SFRI | Sludge Filtration Resistance Index |
| TLM | Thermal Lens Microscopy |
| VGAO | Variable Gage Atomic Orbital |
| MCT | Mercury Cadmium Telluride |
| LENA | Low-energy Neutral Atom |
| ICPEMC | International Commission On Protection Against Environmental Mutagens And Carcinogens |
| RB | Renormalized Band (method In Electronic-structure Calcns.) |