Power factor, but most power supplies have a good amount of power factor correction on them now, and datacenters can have PFC as an independent system and/or in

Power factor, but most power supplies have a good amount of power factor correction on them now, and datacenters can have PFC as an independent system and/or inside some types/modes of UPSes. Oddly enough the capacitive power factor of power supplies cancels out with some of the inductive loads of supporting mechanical equipment.