| Acronym | Meaning |
| AFB | Atmospheric Fluidized Bed |
| NRE | Notice Of Revised Estimate |
| AXAF | Advanced X-ray Astrophysics Facility |
| ANS | Autonomic Nervous System |
| FL | Foothills Laboratory |
| FPS | Feet Per Second |
| IRD | Instrument Requirement Document |
| UCLA | University Of California At Los Angeles |
| HRDI | High Resolution Doppler Imager |
| ABC | Accelerator-based Conversion |