A server room is a room, usually air-conditioned, devoted to the continuous operation of computer servers. An entire building or station devoted to this purpose is a data center.
A server room in Písek, Czech Republic
Wikimedia servers in 2012
A data center or data centre is a building, a dedicated space within a building, or a group of buildings used to house computer systems and associated components, such as telecommunications and storage systems.
ARSAT data center (2014)
NASA mission control computer room c. 1962
Racks of telecommunications equipment in part of a data center
Perforated cooling floor tile