| Acronym | Meaning |
| NLXC | Nonlocal Exchange Correlation (potential) |
| NEROS | Northeast Regional Oxidant Study |
| AIMB | Analogy And Intelligence In Model Building |
| APC | Antigen Presenting Cell |
| SDIO | Strategic Defense Initiative Organization |
| IAAD | Ion Assisted Arc Deposition |
| ARIPO | African Regional Intellectual Property Organization |
| RIOSA | Rotational Infinite Order Sudden Approxn. |
| CEPM | Coupled Electron Pair Method |
| WCUB | Wang Chang-Uhlenbeck-de Boer (quantum-mech. Relation In Rotational Relaxation Calcn.) |