By Maksym HartInkFreeNewsEditor’s Note: This article is the first in a five-part series about data centers. At their core, data centers are built around servers, the physical machines that process and store digital information. Data centers depend on layers of redundant power systems, including utility power, substations, battery-based backup systems and diesel or natural gas generators. Enterprise data centers are operated by a single organization, such as a bank or hospital, for its own use. Hyperscale data centers are massive facilities operated by cloud providers and major technology companies.