Mannheim Supercomputer Statistics
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Every year since 1986 Hans Meuer of the University of Mannheim, Germany published statistics on the supercomputer market at the Mannheim Supercomputer Seminar. The statistics were primarily based on system counts of the major vector computer manufacturers.
All the data used in these statistics from 1986-1992 had been contributed mainly by the manufacturers who provided information on their systems installed in the different continents/countries. While the data could be checked in Europe, and also in the US without difficulties, at least as far as the non-classified installations were concerned, there was no real chance to check the data from Japan. The data provided by e.g. Hitachi for Hitachi, NEC, Fujitsu was compared with the entries provided by NEC for NEC, Hitachi, Fujitsu, etc. and later an appropriate average was calculated. Japanese manufacturers were allowed to name not only their top end models but also their entry level systems since some Cray 1's appeared in the statistics for a long time.
The TOP500 list has replaced the Mannheim Supercomputer Statistics in 1993.