| Acronym | Meaning |
| SLPM | Standard Liters Per Minute |
| IF DRM | Inversion-free Direct Recursion Method (for Surface Electronic Structure) |
| ECMWF | European Center For Medium Range Weather Forecast |
| ELA | Experimental Lakes Area (northwest Ontario) |
| BCC | Bioaccumulative Chemicals Of Concern |
| IEG | Immediate Early Gene |
| CCA | Crystalline Colloidal Array |
| CISA | Continuum Intermediate-state Approxn. (for Scattering) |
| CDT | Critical Dissolution Time (synthetic Fiber And Polymer Property) |
| IT | Integral Transform |