| Acronym | Meaning |
| FM | Femtometre |
| DCA | Defensive Counter Air ?DiChloroAcetate -Ronald Reagan Washington National Airport (IATA Code) |
| JFET | Junction Field-Effect Transistor (jay-fett) |
| ALSP | Aggregate Level Simulation Protocol |
| PRBO | Point Reyes Bird Observatory |
| PG | Picogram |
| NSS | (U.S.) Naval Simulation System |
| ATSD | (U.S.) Assistant To The Secretary Of Defense |
| LASER | Light Amplification By Stimulated Emission Of Radiation (cf. Maser) |
| LISA | Laser Interferometer Space Antenna |