| Acronym | Meaning |
| ISSC | International Subcommission On Stratigraphic Classification |
| ELAP | Environmental Laboratory Accreditation Program |
| TPSR | Temp.-programmed Surface Reaction |
| LD | Laser Diode |
| VESCF | Variable Electronegativity Self-consistent Field |
| CASR | Chemical Activity Status Report |
| BEJ | Best Expert Judgement |
| ASF | Atomic Sensitivity Factor |
| LFC | Load Frequency Control (battery Systems) |
| IBR | In-plane Birefringence |