| Acronym | Meaning |
| LET | Light-emitting Transistor |
| CCAP | Center For Clean Air Policy |
| OP-AMP | Operational Amplifier |
| TTVD | Trap-to-trap Vacuum Distillation |
| QMS | Quadrupole Mass Spectrometry |
| HGSI | The Human Genome Sequencing Index |
| RAHB | Resonance-assisted Hydrogen Bond |
| EDL | Electric Double Layer |
| OTIS | Oklahoma Telecommunications Interlibrary System |
| PSI | Pollution Standard Index |