| CID | Criminal Investigation Division (skr.) |
|---|---|
| CIE | Centro de Investigação em Educação |
| CIE | Centro de Investigación en Energía |
| DSI | Detailed Spectrum Investigation (skr.) |
| DSI | Detailed Spectrum Investigation, podrobné skúmanie spektra (angl.skr.) |
| FBI | Federal Bureau of Investigation |
| HITS | Homicide Investigation Tracking System |
| STONE | americký investigatívny žurnalista (Isidor Feinstein, 1907-1989) |
| TARBELLOVÁ | americká učiteľka, spisovateľka a investigatívna novinárka (Ida Minerva, 1857-1944) |
| USPIA | United States Private Investigators Association |