| Acronym | Meaning |
| IMHEX | Internally Manifolded Heat Exchanger (molten Carbonate Fuel Cell Design) |
| ESA | Excited State Absorption |
| BOVOC | Biogenic Oxygenated Volatile Org. Compd. |
| POH | Purgeable Organic Halogen(s) |
| PFBC | Pressurized Fluidized-bed Combustion (in Energy Technology) |
| PVD | Physical Vapor Deposition |
| 2PH TDA | Two-particle-hole Tamm-Dancoff Approximation (for Closed-shell |
| IRI | Interfaculty Reactor Institute |
| HANS | Heavy Aromatic Naphtha Solvent |
| PMT | Pasteurella Multocida Toxin |