| Acronym | Meaning |
| HIT | Heterojunction With Intrinsic Thin Layer (photovoltaic Cell; Solar Cell) |
| SQM | Scaled Quantum Mechanics (in Ab Initio Calcns.) |
| SNR | Supernova Remnant |
| DPA | Differential Pulse Amperometry |
| BNCT | Boron Neutron Capture Therapy |
| DIPE | Diisopropyl Ether |
| RFA | Renormalized Free Atom (model |
| IRP | Internal Reflection Photolysis |
| EO | Equivalent Orbital |
| EHMI | Environmental Hazards Management Institute |