Where are the world’s most powerful supercomputers located? The latest June 2008 version of the TOP500 supercomputers includes the first ever supercomputer to reach a peak performance of more than 1 petaflop/s (one quadrillion floating point operations per second). The Number 1 ranked system, named ’Roadrunner’, was built by IBM for the U.S. Department of Energy’s Los Alamos National Laboratory.

The USA holds the top 5 supercomputers on the list. Germany holds the top system outside the USA. India and France also have systems in the Top 10.

The USA holds 257 of the 500 systems. Europe holds 184 systems and Asia holds 48 systems. Some of the leading countries on the list include the United Kingdom (53 systems), Germany (46 systems), Japan (22 systems), China (12 systems), India (6 systems).

The TOP500 list is compiled by Hans Meuer of the University of Mannheim, Germany; Erich Strohmaier and Horst Simon of NERSC/Lawrence Berkeley National Laboratory; and Jack Dongarra of the University of Tennessee, Knoxville.

The Top 20 listings are below:
1. USA - Dept. of Energy / NNSA / LANL
2. USA - Dept. of Energy / NNSA / LLNL
3. USA - Argonne National Laboratory
4. USA - Texas Advanced Computing Center/University of Texas
5. USA - Dept. of Energy / Oak Ridge National Laboratory
6. Germany - Forschungszentrum Juelich
7. USA - New Mexico Computing Applications Center
8. India - Computational Research Laboratories, TATA SONS
9. France - IDRIS
10. France - Total Exploration Production
11. Sweden - Government Agency
12. USA - NNSA / Sandia National Laboratories
13. France - EDF R&D
14. USA - IBM Thomas J. Watson Research Center
15. USA - NERSC/LBNL
16. Japan - Information Technology Center, The University of Tokyo
17. USA - StonyBrook/BNL, New York Center for Computational Sciences
18. United Kingdom - ECMWF
19. Germany - RZG / Max-Planck-Gesellschaft MPI/IPP
20. Japan - Center for Computational Sciences, University of Tsukuba
Other notable American listings are:
21. DOE/NNSA/LLNL
22. Rensselaer Polytechnic Institute, Computational Center for Nanotechnology Innovations.
23. NCSA
25. NASA / Ames Research Center / NAS
28. ERDC MSRC
30. NCAR (National Center for Atmospheric Research)
31. NNSA / Sandia National Laboratories
33. Wright-Patterson Air Force Base / DOD ASC
35. IBM / ECMWF
37. IBM - Rochester
38. Texas Advanced Computing Center / University of Texas
41. Maui High-Performance Computing Center
43. US Army Research Laboratory
44. R-Systems
48. Lawrence Livermore National Laboratory
50. ERDC MSRC
54. Louisiana Optical Network Initiative
57. National Institute for Computational Sciences / Univ. of Tennessee
58. NASA / Ames Research Center / NAS
60. Harvard University - FAS Research Computing
62. Clemson University
63. University of Southern California