| Acronym | Meaning |
| PPFD | Photosynthetic Photon Flux D. |
| TBA | True Bicarbonate Activity |
| ATS | Applied Technology Satellite |
| ECCES | Environmental Calculations Of Consequences From Energy Systems (model) |
| TCDE | Two-center Dirac Equation |
| CCL | Drinking Water Contaminant Candidate List |
| DME | Dielectric Midgap Energy (model) |
| FEI | Fire And Explosion Index |
| PNC | Parity Nonconservation |
| LSM | Laser Surface Melting |