| Acronym | Meaning |
| PEL | Photo-electron Layer |
| NASAO | National Association Of State Aeronautics And Organizations |
| ADPE | Automatic Data Processing Equipment Or ADP Equipment |
| SKE | Specific Kinetic Energy |
| SLAPS | St. Louis Air Pollution Study |
| GEIA | Global Emissions Inventory Activity |
| AFPS | AWIPS Forecast Preparation System |
| AWDS | Automated Weather Distribution System |
| IERS | International Earth Rotation Service |
| ADS | Airborne Data System |