| Acronym | Meaning |
| IERM | Intermediate Energy R-matrix (theory In Scattering Calcns.) |
| HDD | Hard Disk Drive |
| EIM | Eddy Interaction Model |
| WINDII | Wind Imaging Interferometer |
| EGR | Exhaust Gas Recirculation |
| JURIS | Justice Retrieval And Inquiry System |
| CHIEF | Clearinghouse For Inventories And Emission Factors |
| TDC | Top Dead Center |
| ETB | Extended Tight-binding (method For Electronic-structure Calcns.) |
| VHMS | Volcanic-hosted Massive Sulfide |