| Acronym | Meaning |
| IWIC | International Waste Identification Code |
| SEE | Static Exact Exchange (approxn. In Electron-mol. Scattering) |
| DMSP | Defense Meteorological Satellite Program |
| ABSORB | Arctic Beaufort Sea Oilspill Research Body |
| GBH | Gravel Bed Hydroponic System (for Wastewater Treatment) |
| IOW | Integrated Optical Waveguide |
| PPMA | Parts Per Million Atomic |
| MAE | Microwave-assisted Extraction |
| IFFD | Intermittently Fed Fill And Draw System |
| GEA | Gradient-expansion Approxn. (in Exchange-energy Calcns.) |