Luhn spent greater and greater amounts of time on the problems of information retrieval and storage faced by libraries and documentation centers, and pioneered the use of data processing equipment in resolving these problems . " Luhn was the first, or among the first, to work out many of the basic techniques now commonplace in information science . " These techniques included full-text processing; hash codes; Key Word in Context indexing ( see also Herbert Marvin Ohlman ); auto-indexing; automatic abstracting and the concept of selective dissemination of information ( SDI ).
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