If we define a data center at the very minimum as a feature-complete computing facility with infrastructure and storage elements, as well as secured backup power, the ENIAC could be seen as the grandfather of the data centers we know today. Short for Electronic Numerical Integrator And Computer, ENIAC was built in 1946 for the U.S. Army Ballistic Research Laboratory to store artillery firing codes. No other computer prior to that had a comparable storage and calculation capacity. It had 17,468 vacuum tubes, 7,200 crystal diodes, and 10,000 capacitors. The entire installation required 1,800 square feet of floor space and consumed a massive 150 KW of power to deliver a compute performance of 0.05 MIPS. ENIAC was used until 1955. Remaining components of the ENIAC can be seen at the School of Engineering and Applied Science at the University of Pennsylvania.