Speedy computers have become indispensable to new breakthroughs in science, engineering, and business. A worldwide race is under way to build ever-faster machines for tackling ever-tougher problems. To keep tabs on this competition, BusinessWeek Online will regularly update this list of the top teracrunchers
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| Rank | Location and User | Computer (vendor) | Peak Speed teraflops* |
| ** | U.S.: Lawrence Livermore Lab | BlueGene/L (IBM) | 367 |
| 1 | U.S.: Lawrence Livermore Lab | BlueGene/L (IBM) | 183.5 |
| ** | U.S.: Lawrence Livermore Lab | ASCI Purple (IBM) | 93.4 |
| 2 | U.S.: IBM Watson Research | BGW (IBM) | 91 |