According to 2nd edition's Manual of Exalted Power : The Alchemicals, subroutine spirits are Autochthon's manufactured counterpart to 1st and 2nd circle demons, and are divided into three tiers based on power, importance and autonomy : Alpha, Beta and Gamma in ascending order, and Autochthon has made his Divine Ministers incapable of spawning new exmachina, 2nd edition material is unclear about the fate of pre-existing 2nd circle exmachina.
