| Acronym | Meaning |
| YTD | Year-To-Date |
| PLB | Personal Locator Beacon |
| DFCB | Data Format Control Book |
| WOS | Wilson Ornithological Society |
| PDA | Personal Digital Assistant - Predicted Drift Angle - Public Display Of Affection - Push-Down Automaton |
| EOTS | Electro-Optical Tactical Sensor |
| USAPATRIOT | Uniting And Strengthening America By Providing Appropriate Tools Required To Intercept And Obstruct Terrorism |
| YS | Yoctosecond |
| JP | Japan (ISO 3166 Digram) -Justice Of The Peace |
| SCFH | Standard Cubic Foot Per Hour (unit Of Measurement Of Fluid Flow) |