| Acronym | Meaning |
| HFB | Hybrid Fluidized Bed |
| FOM | Figure Of Merit |
| MAPKK | Mitogen-activated Protein Kinase Kinase |
| MAFF | Ministry Of Agriculture |
| S/MTD | STOL Maneuvering Technology Demonstrator (program) |
| PPP | Positron Polarization Potential |
| PE | Performance Evaluation |
| TTP | Thrombotic Thrombocytopenic Purpura |
| NLXC | Nonlocal Exchange Correlation (potential) |
| CNDOL | Complete Neglect Of Differential Overlap-azimutal Quantum Number (of Valence AO'S) |