| Acronym | Meaning |
| APOL | Analytical Photonics And Opto-Electronics Laboratory |
| PGS | Product |
| DGPS | Differential Global Positioning System |
| ECCN | Export Control Classification Number |
| ETCO | External Tanks Corporation |
| M | Mach |
| MCR | Multichannel Cloud Radiometer |
| IR-RAD | Infrared Radiometer |
| RAPS-92 | Real-Time Analysis And Prediction Of Storms-1992 |
| CCARS | Computer Controlled Automatic Rain Sampler |