United Kingdom
In June 1998, 25 systems appeared in the TOP500 list.
| Rank | System | Procs | Memory(GB) | Rmax (GFlops) | Rpeak (GFlops) | Vendor |
|---|---|---|---|---|---|---|
| 4 | T3E900 | 840 | N/A | 450 | 756 | Cray Inc. |
| 19 | VPP700/116 | 116 | N/A | 213 | 255.2 | Fujitsu |
| 26 | T3E900 | 256 | N/A | 161 | 230.4 | Cray Inc. |
| 73 | T3E | 128 | N/A | 55.7 | 76.8 | Cray Inc. |
| 80 | SR2201/224 | 224 | N/A | 51.13 | 67.2 | Hitachi |
| 84 | T3D MC512-8 | 512 | N/A | 50.8 | 76.8 | Cray Inc. |
| 93 | ORIGIN 2000 250 MHz | 128 | N/A | 40.25 | 64 | SGI |
| 196 | HPC 10000 | 64 | N/A | 26.45 | 32 | Sun |
| 206 | T3D MC256-8 | 256 | N/A | 25.3 | 38.4 | Cray Inc. |
| 216 | ORIGIN 2000 | 74 | N/A | 23.26 | 28.86 | SGI |
| 218 | SX-4/12A | 12 | N/A | 23.2 | 24 | NEC |
| 229 | SP P2SC 160 MHz | 48 | N/A | 22.19 | 30.72 | IBM |
| 247 | HPC 10000 | 48 | N/A | 20.3 | 24 | Sun |
| 262 | ORIGIN 2000 | 64 | N/A | 20.1 | 24.96 | SGI |
| 265 | ORIGIN 2000 | 64 | N/A | 20.1 | 24.96 | SGI |
| 315 | VPP300/9 | 9 | N/A | 19.2 | 19.8 | Fujitsu |
| 348 | SP P2SC 135 MHz | 42 | N/A | 16.41 | 22.68 | IBM |
| 366 | HPC 10000 | 36 | N/A | 15.42 | 18 | Sun |
| 367 | HPC 10000 | 36 | N/A | 15.42 | 18 | Sun |
| 392 | HPC 10000 | 35 | N/A | 15 | 17.5 | Sun |
| 393 | SP P2SC 160 MHz | 32 | N/A | 14.93 | 20.48 | IBM |
| 402 | SP P2SC 160 MHz | 32 | N/A | 14.93 | 20.48 | IBM |
| 406 | SP P2SC 160 MHz | 32 | N/A | 14.93 | 20.48 | IBM |
| 430 | SP2/75 | 75 | N/A | 14.38 | 19.95 | IBM |
| 484 | Y-MP C916/16256 | 16 | N/A | 13.7 | 15.238 | Cray Inc. |