| Acronym | Meaning |
| PEN | Personal Electronic Notebook |
| IMO | Intermolecular Mol. Orbital |
| OU | Odor Units |
| SCRI | Steel Can Recycling Institute |
| RRT | Relative Retention Time |
| ACSI | Accelerated Strategic Computing Initiative (for Fusion Reactor) |
| ADA | N-(2-acetamido) Iminodiacetic Acid |
| EPIC | Erosion-productivity Impact Calculator |
| DBPR | Microbiological And Disinfection Byproducts Regulations |
| RACER | Research On Antarctic Coastal Ecosystem Rates |