| Acronym | Meaning |
| MRCEPA | Multireference Coupled-electron-pair Approxn. |
| RAS | Reflection-absorption Spectroscopy |
| JFCA | Japan Fine Ceramics Association |
| KFRP | Kevlar Fiber-epoxy Reinforced Plastic |
| PEDM | Perturbation Expansion (of The) Density Matrix |
| IPWO | Interface Plane Wave Orbitals |
| SEAWIFS | Sea Viewing Wide Field Of View Sensor |
| SEDM | Selective Excitation Double Moessbauer |
| AVA | Anthrax Vaccine Adsorbed |
| SCRAM | EPA Support Center For Regulatory Air Models |