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Legend to the Keyword Index of the ACM Computing Reviews Classification System [1991 Version]

Founded on the 1982 baseline.
Valid in 1994

Copyright © 1994, by the Association for Computing Machinery, Inc. Copying without fee is permitted provided that the copies are not made or distributed for direct commercial advantage and credit to the source is given. For permission to republish write to: Director of Publications, Association for Computing Machinery. To copy otherwise, or republish, requires specific permission.

The terms listed alphabetically in this index represent items in the 1991 version of the Computing Reviews Classification System.

The entries are composed of words and phrases that occur in: (1) the three numbered levels of categories, (2) the subject descriptors, and (3) the general terms. Implicit subject descriptors (or proper nouns) are not included. The entries are listed alphabetically. Each entry is identified by its location in the tree, or its designation as a general term, using the legend below. The entries were created in the following ways:

Each node name, subject descriptor, and general term is listed just as it appears in the tree, except that items shown in the tree as "e.g." are normally not included with their basic entry.

Word phrases from the tree are permuted and are sequenced on each important word in the phrase. Thus, both "Design Languages" and "Languages, Design" (Node D.3.2) are shown. Similarly, "Vision and Scene Understanding" (Node I.2.10) has entries under "Scene Understanding, Vision" and "Understanding, Vision and Scene."

Short forms, such as abbreviations or acronyms, that occur in the tree are listed. For example, "SIMD" (a subject descriptor from Node C.1.2) and "DDL" (a subject descriptor from Node H.2.3) are included.

Words, phrases, or acronyms used as examples are included. Thus, "Factoring" and "Primality testing" are included because they are examples for the subject descriptor "Number-theoretic computations" (Node F.2.1). Similarly, "MIS" from the parenthetical example in Node H.4.2 is listed.

In some cases, words or phrases from items in the tree are deliberately omitted or combined, in order to provide a more meaningful entry. In such cases, a dagger (°) appears after the level symbol to indicate the modification. For example, the entry "Languages, assembly" is a shortened form of the subject descriptor "Macro and assembly languages" (Node D.3.2) and the entry "Language control structures" is a combination of the subject descriptor "Control structures" and its higher level node (Node D.3.3, "Language Constructs and Features").

In cases where permutations or truncations of a node or subject descriptor would be adjacent entries, they are not included.

Each index term (except the general terms) indicates the most specific or lowest relevant node number. For example, the subject descriptor "Complexity Hierarchies" points to "Complexity Classes" (Node F.1.3). The same phrases often appear in different parts of the tree; in such cases the node name is shown in square brackets next to the term. For example, "File Organization [File Systems Management]" (Node D.4.3) appears next to "File Organization [Information Storage and Retrieval]" (Node H.3.2).

Levels (Legend)

Meaning of Level
First level node (in boldface)
Second level node
Third level node
Subject Descriptor
General Term
Modified entry