MONO91 Automatic Indexing chapter Mary Elizabeth Stevens National Bureau of Standards `I system, also began about this time. Also in 1958, Baxendale published the results of experiments in automatic indexing involving scanning of topic sentences, syntactical deletion processes and automatic phrase selection (Baxendale, 1958 [41] ). With respect to the KWIC and permuted title techniques, several independent approaches were being developed at about the same time as Luhn1s. These concurrent efforts were carried out at the Wright Air Development Center (Netherwood, 1958 [437]), the Rocketdyne Division of North American Aviation (Carlsen, et al, 1958 [99]), and the System Development Corporation (Citron, et al 1958 [120]; Qhlman, 1960 [451]).22 Netherwood1s permuted title index to a bibliography on logical machine design involves manual simulation of a machineable method. Mthough the results were not published until June 1958, the manuscript was submitted in November 1957.-[OCRerr]' The Rocketdyne permuted-title bibliography, on industrial control, is credited by both Henderson (19&Z [263]) and Ohlman (1960 [451]) as the first to be produced on computers, the program 1/ In a private communication dated March 13, 1963, Luhn provided the following chronology: May 1957 Routine 1 Program for word isolation within 60 characters per card, written by H. C. Fallon. 1957-1958 Creation of concordances of various scientific papers in the form of cards, each card showing a keyword centrally located within 60 letters worth of the associated phrase. Experimentation with these cards to arrive at thesauri for special fields of interest or study. Idea of auto- matic indexing by means of significant or keywords in context conceived by H. P. Luhn. May 1958 Keyword-in-Context Index for titles only initiated by H. P. Luhn and samples produced with Routine 1 Program. June 1958 Start punching of titles for Keyword-in-Context Index for literature on Information Retrieval and Machine Translation. (Keypunching done by Miss Olive Fergus on.) August1958 Simplified version of Routine 1 written by H. C. Fallon for generating Keywords-in-Context Indexes and delivered to Service Bureau Corporation, New York City. September First Fdition of Bibliography and Keyword-in-Context Index on 1958 Information Retrieval and Machine Translation published by Service Bureau Corporation. January 1959 Started writing program for improved version of Keyword-in-Context Index, including derived identification code, written by Jr. J. Havender. June 1959 Second Edition of Bibliography and Keyword-in-Context Index on Information Retrieval and Machine Translation, published by Service Bureau Corporation, including derived identification codes. 2/ See also National Science Foundation's CR&D Report No. 3, [430], p. 39. 3/ Netherwood, 1958 [437) , p. [OCRerr]55, footnote. 5