| Acronym | Meaning |
| FCC | Flight Control Computer |
| PSOM | Pseudostate Optical Model |
| NASQUAN | National Stream Water Quality Accounting Network |
| FBCB | Fixed Bed Circulating Bioreactor (for Wastewater Treatment) |
| MCL | Method Calibration Limit |
| ATD | Atmospheric Technology Division |
| CROSSBOW | Computerized Retrieval Of Organic Structures Based On Wiswesser |
| EPR | Ethylene-propylene Rubber |
| LBW | Laser-beam Welding |
| MMS | Merged Markush Service |