Module
Warning: Spoilers
The Modules were the designated areas for category 1 individuals, but did not appear on the standard overhead photos, which were doctored by PhiCorp. The real images which showed the modules could be seen with photos from a NORAD satellite. All of the Modules were in reality crematoriums which burned everyone in them alive. Inside, they were lined with cement bricks, but that was just a facade for the ceramic walls. They also contained crude wooden bunks and bellow them on the sides were multiple flamethrower like nozzles. At the San Pedro Overflow Camp, Rex Matheson noted that there were three Modules, although that may just be for that camp. (TW: The Categories of Life)