| Acronym | Meaning |
| HHAP | Heavy Hydroaroms. From Petroleum |
| CEFIC | European Chemical Industry Association |
| UNFCCC | United Nations Framework Convention On Climate Change |
| BIB | Blocked Impurity Band |
| LBO | Localized Born-Oppenheimer |
| RFA | Regulatory Flexibility Analysis |
| ORPA | Optimized Random Phase Approximation |
| DPD | Diethyl-p-phenylenediamine (test For Chlorine In Water) [93-05-0] |
| LIVA | Light-induced Voltage Alteration |
| APIG | Antisymmetrized Product (of) Identical Geminals |