| Acronym | Meaning |
| IPNO | Independent-pair Natural Orbital |
| PTCA | Percutaneous Transluminal Coronary Angioplasty |
| EACN | European Air Chemistry Network |
| KFRP | Kevlar Fiber-epoxy Reinforced Plastic |
| CRDL | Contract Required Detection Limit(s) |
| TCO | Transparent Conducting Oxide |
| TBU | Tertiary Building Unit |
| INA | Ion Neutral Analysis |
| LADD | Lifetime Average Daily Dose |
| VOIE | Valence Orbital Ionization Energy |