Communications of the ACM

Letters to the editor: Do you use microfiche?

Harold Wooster
Pages 657-658

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Letters to the editor: a machine algorithm for processing calendar dates

Henry F. Fliegel, Thomas C. van Flandern
Page 657

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Letters to the editor: On binary notation

Bruce A. Martin
Page 658

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Letters to the editor: comment on curriculum 68

Raymond P. Wishner
Page 658

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President's letter to the ACM membership: involvement

Bernard A. Galler
Page 659

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Scientific Applications: Computer synthesis of Holograms for 3-D display

Optical and digital holography are reviewed. The mathematical model and computational techniques of the authors' digital holographic process are discussed, and applications of computer holography are suggested. Computer holograms … L. B. Lesem, P. M. Hirsch, J. A. Jordan
Pages 661-674

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Business Applications: GAN, a system for generating and analyzing activity networks

GAN, a system for generating activity networks, is designed to save time in the preparation of activity networks and to deal conveniently with network programs. A defining description of a programming language designed for generating … A. Schurmann
Pages 675-679

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Ambiguity in limited entry decision tables

P. J. H. King
Pages 680-684

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Programming Languages: Boolean matrix methods for the detection of simple precedence grammars

The use of decision tables as a tool in systems analysis and for program specification is now becoming accepted. Rules on redundancy, contradiction, and completeness for limited entry tables were published in 1963. These are  … David F. Martin
Pages 685-687

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The implementation of a BASIC system in a multiprogramming environment

A mechanical procedure is derived for determining whether a given context-free phrase structure grammar is a simple precedence grammar. This procedure consists of elementary operations on suitably defined Boolean matrices. Application … Helen V. Braden, William A. Wulf
Pages 688-692

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Information Retrieval: Easy English, a language for information retrieval through a remote typewriter console

Easy English is a natural command language designed to simplify communication between man and machine through remote typewriter console. It has been developed for retrieval of documents from a computerized data base, the Moore … M. Rubinoff, S. Bergman, F. Rapp, H. Cautin
Pages 693-696

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Education: A general-purpose display processing and tutorial system

ADEPT (A Display-Expedited Processing and Tutorial) system is described. This system was designed to improve man-computer communications by employing a display unit to interleave tutoring with other computer operations such as … K. J. Engvold, J. L. Hughes
Pages 697-702

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Numerical Analysis: A fast fourier transform algorithm for real-valued series

A new procedure is presented for calculating the complex, discrete Fourier transform of real-valued time series. This procedure is described for an example where the number of points in the series is an integral power of two. … Glenn D. Bergland
Pages 703-710

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Letters to the editor: On “prime phrase” in Feldman and Gries paper

Paul Abrahams
Page 657

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