var/global/list/cable_list = list()					//Index for all cables, so that powernets don't have to look through the entire world all the time
var/global/list/portals = list()					//for use by portals
var/global/list/mechas_list = list()				//list of all mechs. Used by hostile mobs target tracking.
var/global/list/shuttle_caller_list = list()  		//list of all communication consoles and AIs, for automatic shuttle calls when there are none.

//items that ask to be called every cycle
var/global/list/machines = list()
var/global/list/processing_objects = list()
var/global/list/active_diseases = list()

var/global/list/chemical_reactions_list				//list of all /datum/chemical_reaction datums. Used during chemical reactions
var/global/list/chemical_reagents_list				//list of all /datum/reagent datums indexed by reagent id. Used by chemistry stuff
var/global/list/surgeries_list = list()				//list of all surgeries by name, associated with their path.