Meta terminology
GIFCT
Global Internet Forum to Counter Terrorism
The cross-industry body operating a shared hash database for terrorist content. Named internally alongside NCMEC for child safety and StopNCII.org for adult sexual exploitation as the three arrangements under which Meta receives hashes from an external body for use in its own detection.
Source
Internal documentUnsealed internal messages ("Re: [A/C Priv] Seeking IG support to mitigate S258090")