| Acronym | Meaning |
| DIR | Diffusion Induced Recrystn. |
| HQM | Hemiquantal Mechanics (in Mol. Calcns.) |
| ANPP | Aboveground Net Primary Production |
| PIUG | Patent Information Users Group |
| LCTAO | Linear Combination Of Traveling Atomic Orbitals |
| EDRS | Enforcement Document Retrieval System |
| TCR | Temperature Coefficient Of Resistance |
| TDO | Truncated Diatomic Orbital (a MO) |
| DIGIT | Deep Infrared Galaxy Imaging Telescope |
| ALE | Atomic Layer Epitaxy |