| Acronym | Meaning |
| LIS | Lightning Imaging Sensor |
| HEM | Human Exposure Model |
| SAN | Styrene-acrylonitrile Copolymer |
| HEDS | Human Exploration And Development Of Space |
| PDT | Photodynamic Therapy |
| PIPECO | Photoion-photoelectron Coincidence Spectroscopy |
| CIM | Computer-integrated Manufacturing |
| HAN | Halogenated Acetonitrile(s) |
| OLPA | Orbital Local Plasma Approxn. (in Stopping Power Calcn. For Ions By Films) |
| KVP | Kohn Variational Principle |