| Acronym | Meaning |
 | SCA | Self-consistent Approximation |
| OCEPA | Office Of Communications |
| NIST | National Institute Of Standards And Technology (formerly NBS) |
| ICNZ | International Committee On Natural Zeolites |
| FRS | Forced Rayleigh Scattering |
| FINES | Furnace Ionization Nonthermal Excitation Spectrometry |
| IBS | Irritable Bowel Syndrome |
| IUVSTA | International Union Of Vacuum Science |
| NRA | Nuclear Reaction Analysis (Rensselear Polytech) |
| GRIDS | Geographic Resources Information And Data System |
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