Subject Index to Unclassified ASTIA Documents PDF Download
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Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Research
Languages : en
Pages :
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Book Description
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Research
Languages : en
Pages :
Get Book Here
Book Description
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 296
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Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1812
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Book Description
Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Documentation
Languages : en
Pages : 608
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Book Description
Author:
Publisher:
ISBN:
Category : Industries
Languages : en
Pages : 616
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Book Description
Author: New York Public Library. Research Libraries
Publisher:
ISBN:
Category : Library catalogs
Languages : en
Pages : 648
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Book Description
Author:
Publisher:
ISBN:
Category : Union catalogs
Languages : en
Pages : 734
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Book Description
Includes entries for maps and atlases.
Author: New York Public Library. Economic and Public Affairs Division
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 744
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Book Description
Author: United States. Air Force. Systems Command. Aeronautical Systems Division
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 56
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Book Description
Author: George W. Barnard
Publisher:
ISBN:
Category : Abstracting
Languages : en
Pages : 32
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Book Description
The field of information retrieval, the methods of indexing and storing the vast number of scientific documents which have been produced in recent years is surveyed. Information retrieval utilizes coordinate indexing - that is, listing documents under all the topics they contain and searching for them by two or more terms. There are two principal types of indexing: one using a predetermined list of terms into which all documents must be fitted and the other allowing free choice of the terms found in the documents themselves. Elaboration of these methods and the difficulty of developing a list of indexing terms are also discussed. An information retrieval system may consist of an index only, an index with an abstract, or an entire document with an index. The mechanical equipment used may range from punched cards through IBM cards to complex computers and micro photographic systems. The experiences of various organizations with different combinations of equipment and methods are discussed.
