High Performance Computing Center, Stuttgart

The High Performance Computing Center (HLRS) in Stuttgart, Germany, is a research institute and a supercomputer center. HLRS has currently a flagship installation of a HPE Apollo 9000 system called "Hawk" 26 PFLOPS peak performance replacing the Cray XC40 system called "Hazel Hen", providing ~7,4 PFLOPS peak performance. Additional systems include NEC clusters (NEC SX-ACE systems for testing, NEC Vulcan + Vulcan2 for non-critical computing) and Cray CS-Storm cluster.
Known historical configurations: 
1996 - Cray T3E / 512 + NEC SX-4
2000 - Hitachi SR-8000 + NEC SX-5 / 32M2
2003 - ? (Opteron/Xeon cluster) + NEC SX-6
2005 - NEC SX-8
2008 - IBM BW-Grid + NEC SX-9
2009 - Cray XT5M
2010 - Cray XE6 "Hermit"
2014 - Cray XC40 "Hornet"
2019 - Cray CS-Storm
2020 - HPE Apollo 9000 "Hawk" + NEC (Vulcan + Vulcan2 + NEC SX-ACE).