| Acronym | Meaning |
 | ORBIT | On-line Retrieval Of Bibliographic Information Timesharing |
| AOB | Adiabatic Oxygen Bomb (calorimeter) |
| FCC | Food Chemicals Codex |
| BCCD | Brueckner Coupled Cluster With Double Excitations |
| RCC | Relativistic Coupled Cluster |
| PAPP-A | Pregnancy-associated Plasma Protein A |
| SMM | Single-molecule Magnet |
| OEL | Occupational Exposure Limit |
| HIGFET | Heterostructure Insulated Gate Field Effect Transistor |
| PPGA | Plastic Pin Grid Array [electronic Package] |
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