| Acronym | Meaning |
| MWPC | Multiwire Proportional Chamber |
| MDO | Max. Degree Of Order |
| LAOM | Localized At. Orbital Method (in Electronic Structure Calcn.) |
| BTZ | Below The Treatment Zone |
| RSPA | Research And Special Programs Administration (Dept. Of Transportation) |
| PAHO | Pan American Health Organization |
| CFSS | Constant-final-state Spectroscopy |
| OLGA | On-Line Gas Chemistry Apparatus |
| UMLS | Unified Medical Language System |
| EAA | Essential Amino Acids |