RIID
| 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 |