| Acronym | Meaning |
| ELLWAS | Enhanced Low-Level Windshear Alert System |
| ETH | Eidgenossische Technische Hochschule |
| OSS | Observation System Simulation |
| CDC | Centers For Disease Control |
| IRIG | Inter-range Instrumentation Group |
| OPC | Optical Propagation Conference |
| USIC | UCAR Space Implementation Committee |
| EP | Electrical Power |
| ISR | Individual Schedule Request |
| HVPS | High-volume Precipitation Spectrometer |