United Kingdom
In November 1998, 28 systems appeared in the TOP500 list.
| Rank | System | Procs | Memory(GB) | Rmax (GFlops) | Rpeak (GFlops) | Vendor |
|---|---|---|---|---|---|---|
| 5 | T3E900 | 876 | N/A | 552 | 788.4 | Cray Inc. |
| 7 | T3E1200 | 612 | N/A | 509 | 734.4 | Cray Inc. |
| 26 | T3E900 | 348 | N/A | 218 | 313.2 | Cray Inc. |
| 27 | VPP700/116 | 116 | N/A | 213 | 255.2 | Fujitsu |
| 59 | VPP700/48E | 48 | N/A | 97.5 | 115.2 | Fujitsu |
| 85 | SR2201/256 | 256 | N/A | 58.68 | 76.8 | Hitachi |
| 100 | ORIGIN 2000 250 MHz | 128 | N/A | 51.44 | 64 | SGI |
| 111 | T3D MC512-8 | 512 | N/A | 50.8 | 76.8 | Cray Inc. |
| 118 | SP PC604e 332 MHz | 140 | N/A | 44.27 | 92.96 | IBM |
| 179 | HPC 10000 333 MHz | 64 | N/A | 34.17 | 42.62 | Sun |
| 180 | HPC 10000 333 MHz | 64 | N/A | 34.17 | 42.62 | Sun |
| 226 | SP P2SC 135 MHz | 76 | N/A | 29.24 | 41.04 | IBM |
| 228 | SP P2SC 120 MHz | 84 | N/A | 29.07 | 40.32 | IBM |
| 240 | SP PC604e 332 MHz | 88 | N/A | 28.27 | 58.43 | IBM |
| 257 | ORIGIN 2000 | 84 | N/A | 26.843 | 32.76 | SGI |
| 266 | HPC 10000 | 64 | N/A | 26.45 | 32 | Sun |
| 292 | ORIGIN 2000 250 MHz | 64 | N/A | 26.24 | 32 | SGI |
| 302 | T3D MC256-8 | 256 | N/A | 25.3 | 38.4 | Cray Inc. |
| 321 | SX-4/12A | 12 | N/A | 23.2 | 24 | NEC |
| 343 | SP P2SC 160 MHz | 48 | N/A | 22.19 | 30.72 | IBM |
| 345 | SP P2SC 160 MHz | 48 | N/A | 22.19 | 30.72 | IBM |
| 377 | ORIGIN 2000 | 64 | N/A | 20.75 | 24.96 | SGI |
| 414 | HPC 10000 | 48 | N/A | 20.3 | 24 | Sun |
| 444 | VPP300/9 | 9 | N/A | 19.2 | 19.8 | Fujitsu |
| 459 | ORIGIN 2000 250 MHz | 44 | N/A | 18.1 | 22 | SGI |
| 482 | HPC 10000 333 MHz | 32 | N/A | 17.91 | 21.31 | Sun |
| 488 | HPC 10000 333 MHz | 32 | N/A | 17.91 | 21.31 | Sun |
| 493 | ORIGIN 2000 250 MHz | 42 | N/A | 17.28 | 21 | SGI |