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Herbert Marvin Ohlman

Herbert Marvin Ohlman (1927–2002) is the inventor of permutation indexing, or Permuterm in 1958 in a paper titled "Subject-word letter frequencies with applications to superimposed coding" to the International Conference on Scientific Information (ICSI) in Washington, DC. Permuterm is known one of the first successful punch card indexing systems, and is still referenced today in the data indexing field. Herbert M. Ohlman also treated as a developer of the automatic indexing.
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