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| Rank | Location and User | Computer (Vendor) | Teraflops* |
|---|---|---|---|
| ** | U.S.: Lawrence Livermore Lab | BlueGene/L (IBM) | 367 |
| 1 | U.S.: Lawrence Livermore Lab | BlueGene/L (IBM) | 183.5 |
| 2 | U.S.: IBM Watson Research | BGW (IBM) | 115 |
| ** | U.S.: Lawrence Livermore Lab | ASCI Purple (IBM) | 93.4 |
| 3 | Japan: Riken | Molecular Dynamics Machine | 78 |
| ** | Germany: Leibniz Computing Center | HLRB-II (SGI) | 69 |
| 4 | Japan: University of Tokyo | Grape-6 (self-made) | 64 |
| 5 | Japan: Undisclosed | (Hitachi) | 62 |
| 6 | U.S.: NASA Ames | Columbia (SGI) | 61 |
| ** | France: Nuclear Power Agency | Tera10 (Bull) | 60 |
| 7 | Spain: Barcelona Super-computer Center | MareNostrum (IBM) | 42 |
| ** | U.S.: Sandia National Labs | Red Storm (Cray) | 41.5 |
| 8 | Japan: Earth Simulator Center | Earth Simulator (NEC) | 41 |
| 9 | Netherlands: Astron | (IBM) | 34.4 |
| 10 | U.S.: Lawrence Livermore Lab | Thunder (California Digital) | 23 |
| 10 | Switzerland: Ecole Polytechnique | Blue Brain (IBM) | 23 |
| 10 | Japan: AIST Computational Biology Research Center | Blue Protein (IBM) | 23 |
| 11 | China: Meteorlogical Administration | (IBM) | 22 |
| ** | U.S.: Army Corps of Engineers | (Cray) | 21 |
| 12 | U.S.: Los Alamos Lab | ASCI Q (Hewlett-Packard) | 20.5 |
| 13 | U.S.: Virginia Tech | System X (Apple) | 20 |
| 13 | U.S.: Naval Oceanographic Office | Blue Wave (IBM) | 20 |
| 13 | U.S.: Sandia National Labs | Red Storm (Cray) | 20 |
| 14 | Britain: Unidentified bank | (IBM) | 19.6 |
| 15 | U.S.: Oak Ridge National Lab | (Cray) | 18 |
| 16 | UK: European Center for Medium-Range Weather Forecasts (ECMWF) | (IBM) | 16.5 |
| 16 | UK: ECMWF | (IBM) | 16.5 |
| 17 | U.S.: IBM Rochester | BlueGene/L Prototype (IBM) | 16.4 |
| 18 | U.S.: Lawrence Livermore Lab | (IBM) | 15.6 |
| 19 | U.S.: Nat'l Center for Supercomputing Applications (NCSA) | Tungsten (Dell) | 15 |
| 19 | U.S.: University of Southern California | (IBM & Sun) | 15 |
| ** | Korea: Meterological Assn. | (Cray) | 15 |
| 20 | U.S.: Army Research Lab | John von Neumann (Linux Networx) | 14 |
| 20 | Japan: Nagoya University | (SGI) | 14 |
| 21 | Japan: Atomic Energy Research Institute | (SGI) | 13 |
| 21 | U.S.: Wright-Patterson Air Force Base | (SGI) | 13 |
| 22 | Japan: Riken | Riken Super Cluster (Fujitsu) | 12.5 |
| 23 | U.S.: Lawrence Livermore Lab | ASCI White (IBM) | 12 |
| 23 | Japan: National Aerospace Lab | (Fujitsu) | 12 |
| 24 | U.S.: Pacific Northwest National Lab | Cluster Platform (Hewlett-Packard) | 11.6 |
| 25 | U.S.: IBM Almaden | BlueGene (IBM) | 11.5 |
| 25 | U.S.: IBM Deep Computing | BlueGene (IBM) | 11.5 |
| 25 | U.S.: IBM Watson | BlueGene (IBM) | 11.5 |