Mathematical Sciences Classification System
68-XX - Computer science {For papers involving machine computations and programs in a specific mathematical area, see Section –04 in that area}
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                            68-00General reference works (handbooks, dictionaries, bibliographies, etc.)
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                            68-01Instructional exposition (textbooks, tutorial papers, etc.)
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                            68-02Research exposition (monographs, survey articles)
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                            68-03Historical (must also be assigned at least one classification number from Section 01)
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                            68-04Explicit machine computation and programs (not the theory of computation or programming)
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                            68-06Proceedings, conferences, collections, etc.
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                            (+20)Computer system organization
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                            (+30)Software
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                            (+81)Theory of data
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                            (+151)Theory of computing
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                            (+36)Discrete mathematics in relation to computer science
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                            (+77)Artificial intelligence
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                            (+147)Computing methodologies and applications
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                            (+83)