noun
computer center
A facility or department that houses mainframe computers and provides computing services, often in universities or large organizations.
大学の計算機センターでプログラムを実行した。
I ran the program at the university's computer center.
データセンター is a modern data center for servers and cloud infrastructure, while 計算機センター is an older term for a mainframe-based computing facility.
Compound of 計算機 (computer) and センター (center), a straightforward calque from English.