| Acronym | Definition |
|---|
| RIID➣Radiation Isotope Identifier |
| RIID➣Resonance Ionization Imaging Detection |
| RIID➣Regional Investigation and Intelligence Division (Philippines) |
| RIID➣Reserve Intelligence Integration Division (Joint Reserve Intelligence Program) |
| RIID➣Radio-Isotope Identifier Device |
| RIID➣Radiation Isotope Identification Device |