United Kingdom
In June 2001, 31 systems appeared in the TOP500 list.
| Rank | System | Procs | Memory(GB) | Rmax (GFlops) | Rpeak (GFlops) | Vendor |
|---|---|---|---|---|---|---|
| 16 | VPP5000/100 | 100 | N/A | 886 | 960 | Fujitsu |
| 28 | T3E1200 | 812 | N/A | 671 | 974.4 | Cray Inc. |
| 34 | T3E900 | 876 | N/A | 552 | 788.4 | Cray Inc. |
| 39 | T3E1200 | 636 | N/A | 526 | 763.2 | Cray Inc. |
| 109 | T3E900 | 348 | N/A | 218 | 313.2 | Cray Inc. |
| 110 | VPP700/116 | 116 | N/A | 213 | 255.2 | Fujitsu |
| 125 | SP Power3 375 MHz | 168 | N/A | 171 | 252 | IBM |
| 152 | SP Power3 375 MHz | 144 | N/A | 148 | 216 | IBM |
| 193 | SP PC604e 332 MHz | 302 | N/A | 126 | 200.5 | IBM |
| 200 | SP Power3 375 MHz | 120 | N/A | 124 | 180 | IBM |
| 202 | SP Power3 375 MHz | 120 | N/A | 124 | 180 | IBM |
| 218 | HPC 10000 400 MHz Cluster | 192 | N/A | 118.16 | 153.6 | Sun |
| 223 | HPC 10000 400 MHz Cluster | 192 | N/A | 118.16 | 153.6 | Sun |
| 235 | SP Power3 375 MHz | 112 | N/A | 116 | 168 | IBM |
| 247 | SP P2SC 160 MHz | 252 | N/A | 109.9 | 161.2 | IBM |
| 260 | SP Power3 375 MHz | 100 | N/A | 104 | 150 | IBM |
| 274 | SP Power3 375 MHz | 96 | N/A | 100 | 144 | IBM |
| 275 | SP Power3 375 MHz | 96 | N/A | 100 | 144 | IBM |
| 288 | VPP700/48E | 48 | N/A | 97.5 | 115.2 | Fujitsu |
| 290 | SP Power3 375 MHz | 92 | N/A | 96.1 | 138 | IBM |
| 337 | SP Power3 375 MHz | 84 | N/A | 88 | 126 | IBM |
| 346 | ORIGIN 3000 400 MHz | 128 | N/A | 85.44 | 102.4 | SGI |
| 352 | ORIGIN 3000 400 MHz | 128 | N/A | 85.44 | 102.4 | SGI |
| 382 | ORIGIN 2000 400 MHz | 128 | N/A | 81.76 | 102.4 | SGI |
| 395 | HPC 10000 400 MHz Cluster | 128 | N/A | 80.1 | 102.4 | Sun |
| 398 | HPC 10000 400 MHz Cluster | 128 | N/A | 80.1 | 102.4 | Sun |
| 404 | HPC 10000 400 MHz Cluster | 128 | N/A | 80.1 | 102.4 | Sun |
| 432 | SP P2SC 160 MHz | 178 | N/A | 78.4 | 113.9 | IBM |
| 446 | SP Power3 375 MHz | 72 | N/A | 75.9 | 108 | IBM |
| 451 | HPC 10000 400 MHz Cluster | 120 | N/A | 75.8 | 96 | Sun |
| 488 | HPC 10000 400 MHz Cluster | 112 | N/A | 70.12 | 89.6 | Sun |