| Acronym | Meaning |
| SAES | State Agricultural Experiment Stations |
| ECCS | Emergency Core Cooling System |
| MOA | Maximum Overlap Approximation |
| VIVAH | Vibrational Variational Hyperspherical (for Mol. Calcns.) |
| USACE | US Army Corp Of Engineers |
| NEAR | Near Earth Asteroid Rendezvous |
| PTNO | Perturbation Theory Natural Orbital |
| ATRA | All-trans-retinoic Acid |
| AUMP | Annihilated Unrestricted Moeller-Plesset (spin Contaminant) |
| FDTD | Finite-difference Time-domain |