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At the same time, Hans Peter Luhn (working with IBM) distributed his paper titled "Bibliography and index: Literature on information retrieval and machine translation", which contained "titles indexed by Key Words-in-Context system", or KWIC.
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).