| Acronym | Meaning |
| O/I | Optimal Interpolation |
| ICFD | Institute For Computational Fluid Dynamics |
| OR | Operational Research |
| NDARB | North Dakota Atmospheric Resources Board |
| CAGEX | CERES/ARM/GEWEX Experiment |
| PF | Performance Factor |
| STL | Space Technology Laboratory |
| RTTOV | Rediative Transfer (RT) Model For Television Infrared Orbiting Satellite (TIROS) Operational Vertical Sounder (TOVS) |
| MS | The Company Microsoft |
| NAOS | North American Observing System |