| Acronym | Meaning |
| 4DDD | Four-Dimensional Data Assimilation |
| HSRP | High Speed Research Program |
| NWSOP | National Winter Storms Operations Plan |
| LAN | Local Area Network |
| ZTD | Zenith Tropospheric Signal Delay |
| HIPPI | High Performance Parallel Interface |
| APO | Administrative Policy Office |
| C2F3CL3 | CFC-113 |
| WCRP | World Climate Research Program |
| CASAC | Clean Air Scientific Advisory Committee |