| Acronym | Meaning |
| LR-SCF | Low-rank SCF |
| SEN | Submerged Entry Nozzle |
| IRMM | Institute For Reference Materials And Measurements |
| AXAF | Advanced X-ray Astrophysics Facility |
| NDPD | National Data Processing Division |
| HEN | Heat Exchanger Network |
| OEP | Odd-even (alkane/carbon) Predominance (geology) |
| AGNES | Absence Of Gradients And Nernstian Equilibrium Stripping |
| HHS | Health And Human Services Department |
| NSSS | Nuclear Steam Supply System |