FAA Delay Abbreviations Glossary
| ADZY | Advisory |
| ARPT | Airport |
| CDM | Collaborative Decision Making |
| CIGS | Ceilings |
| CLSD | Closed |
| EDCT | Expected Departure Clearance Time |
| EMERG | Emergency |
| EQUIP | Equipment |
| FSM | Flight Schedule Monitor |
| GDP | Ground Delay Program |
| GS | Ground Stop |
| LAADR | Low Altitude Airway Departure Route |
| LAHSO | Land and Hold Short Operations |
| LO CIGS | Low Ceilings/Low clouds |
| NM | Nautical Mile |
| OTS | Out of service |
| RLSD | Released |
| RRTES | Reroutes |
| SVRWX | Severe Weather |
| SWAP | Severe Weather Avoidance Plan |
| TFC | Traffic |
| TSTMS | Thunderstorms |
| VSBY | Visibility |
| WND | Wind |
| WX | Weather |
| WX DEV | Weather Deviation |