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In June 1999, 29 systems appeared in the TOP500 list.

Rank System Procs Memory(GB) Rmax (GFlops) Rpeak (GFlops) Vendor
7 T3E900 876 N/A 552 788.4 Cray Inc.
10 T3E1200 612 N/A 509 734.4 Cray Inc.
39 T3E900 348 N/A 218 313.2 Cray Inc.
40 VPP700/116 116 N/A 213 255.2 Fujitsu
62 SP P2SC 160 MHz 252 N/A 109.9 161.2 IBM
72 VPP700/48E 48 N/A 97.5 115.2 Fujitsu
76 SP PC604e 332 MHz 302 N/A 93.1 200.5 IBM
80 SP P2SC 160 MHz 186 N/A 81.89 119 IBM
86 SP P2SC 160 MHz 178 N/A 78.4 113.9 IBM
111 SR2201/256 256 N/A 58.68 76.8 Hitachi
117 SP PC604e 332 MHz 184 N/A 57.51 122.17 IBM
133 ORIGIN 2000 250 MHz 128 N/A 51.44 64 SGI
156 T3D MC512-8 512 N/A 50.8 76.8 Cray Inc.
174 SP PC604e 332 MHz 140 N/A 44.27 92.96 IBM
253 HPC 10000 333 MHz 64 N/A 34.17 42.62 Sun
254 HPC 10000 333 MHz 64 N/A 34.17 42.62 Sun
280 HPC 10000 400 MHz 48 N/A 33.09 38.4 Sun
327 ORIGIN 2000 300 MHz 64 N/A 31.33 38.4 SGI
342 SP PC604e 332 MHz 96 N/A 30.75 63.74 IBM
372 SP P2SC 160 MHz 64 N/A 29.45 40.96 IBM
373 SP P2SC 160 MHz 64 N/A 29.45 40.96 IBM
376 SP P2SC 135 MHz 76 N/A 29.24 41.04 IBM
379 SP P2SC 120 MHz 84 N/A 29.07 40.32 IBM
396 SP PC604e 332 MHz 88 N/A 28.27 58.43 IBM
419 ORIGIN 2000 84 N/A 26.843 32.76 SGI
428 HPC 10000 64 N/A 26.45 32 Sun
442 ORIGIN 2000 250 MHz 64 N/A 26.24 32 SGI
476 ORIGIN 2000 250 MHz 64 N/A 26.24 32 SGI
489 T3D MC256-8 256 N/A 25.3 38.4 Cray Inc.