| Acronym | Meaning |
| NEXAIR | Next Generation Upper Air System |
| DGPS | Differential Global Positioning System |
| ISOS | International Southern Ocean Study |
| LOE | Level Of Effort |
| IWG | Implementation Working Group |
| OMR | Optical Mark Reader |
| ER | Electrical Resistivity |
| MAN | Metropolitan Area Network |
| TASU | Time-alternating Space-uncentered |
| AGI | American Geological Institute |