54-XX General topology,

• 54-00 General reference works (handbooks, dictionaries, bibliographies, etc.)
• 54-01 Instructional exposition (textbooks, tutorial papers, etc.)
• 54-02 Research exposition (monographs, survey articles)
• 54-03 Historical (must be assigned at least one classification number from 01-XX)
• 54-04 Explicit machine computation and programs (not the theory of computation or programming)
• 54-06 Proceedings, conferences, collections, etc.
• 54Axx Generalities
• 54Bxx Basic constructions
• 54Cxx Maps and general types of spaces defined by maps
• 54Dxx Fairly general properties
• 54Exx Spaces with richer structures
• 54Fxx Special properties
• 54Gxx Peculiar spaces
• 54Hxx Connections with other structures, applications
• 54J05 Nonstandard topology, See also {03H05}