| Acronym | Meaning |
| APACM | Atmospheric Physical And Chemical Monitor |
| ICSU | International Council Of Science |
| SPEC | Scientific Programs Evaluation Committee |
| CDIS | Command And Data Interface Simulator Unit |
| CAS | Climate Analysis Section |
| POP | Probability Of Precipitation |
| PERFMON | Performance Monitor Utility |
| NSRC | National Systems And Research Company |
| B | Bit |
| THORPEX | The Observing System Research And Predictability Experiment |