| Acronym | Meaning |
| PBDF | Polybrominated Dibenzofuran(s) |
| PRRSV | Porcine Reproductive And Respiratory Syndrome Virus |
| IIW | International Institute Of Welding |
| PEDM | Perturbation Expansion (of The) Density Matrix |
| HCF | High-cycle Fatigue |
| DCCI | Dissociation-consistent Configuration Interaction |
| ORF | Open Reading Frame (DNA Sequence) |
| SEAMOS | Single-excitations-adapted Molecular Orbitals |
| SIAM | Society For Industrial And Applied Mathematics |
| LUCO | Lowest Unoccupied Crystal Orbital |