HPE accounted for more supercomputers in the lists than any other company. 46 HPE Living Progress Report 2017 https://www.thegreengrid.org/en/resources/library-and-tools/456-WP https://community.hpe.com/t5/Servers-The-Right-Compute/Achieving-Long-Term-Performance-and-Sustainability-with-Leading/ba-p/6972192#.Wsy4-2UedJE https://www.top500.org/green500/lists/2017/06/ https://www.top500.org/green500/lists/2017/11/ https://news.hpe.com/hpe-and-tokyo-institute-of-technology-build-the-worlds-most-powerful-green-supercomputer/ energy-efficient computer.