| Acronym | Meaning |
| CCC | Correlated Coupled Cluster (quantum Calcn. Method) |
| COIL | Chem. Oxygen-iodine Laser |
| NWS | National Weather Service |
| RTT | Resonant Tunneling Transistor |
| NSS | National Stream Survey (USA) |
| TNA | Thermal Neutron Analysis |
| ISRS | Impulsive Stimulated Raman Scattering |
| SAXS | Small Angle X-ray Scattering |
| IRC | Information Resource Center |
| IBMS | Ion Beam Mass Spectrometry |