| Acronym | Meaning |
| ECP | Estimated Critical Position |
| EPDM | Ethylene-propylene Diene Monomer |
| PWRI | Public Works Research Institute (Japan) |
| EPAAR | EPA Acquisition Regulation Manual |
| ELNES | Electron Energy-loss Near Edge Structure |
| CANDU | Canadian Deuterium-Uranium Reactor |
| CSIRO | Commonwealth Scientific And Industrial Research Organization |
| NRMPI | Non-resonant Multiphoton Ionization |
| CFSTI | Clearinghouse For Federal Scientific And Technical Information |
| DWBA | Distorted-wave Born Approxn. |