| Acronym | Meaning |
| FOS | Family Of Services |
| RTD | Regional Transportation Department |
| ARA | Appletalk Remote Access |
| DMS | Device Management System |
| NPC | National Processing Centers |
| IRI | International Research Institute For Climate Prediction |
| ALPS | Accidental Launch Protection System |
| SVT | Simulated Variable Thickness |
| NCDC | National Climatic Data Center |
| TRACON | Terminal Radar Control |