Estimates for uniprocessor MIPS ratings for the four contenders for the dollars of MVS users quoted in the Wall Street Journal put Amdahl Corp out in front at 54 MIPS, Fujitsu Ltd at 50 MIPS, Hitachi Ltd at 45 MIPS and IBM limping in in last place with 41 MIPS, although the IBM machines are believed to be significantly slugged so that the company can wind up the performance at least to the Hitachi level very quickly; at the top end, the biggest Amdahl is rated by the same source at 323 MIPS and IBM’s biggest, the 9021-900, at 210 MIPS.