43-00 General reference works (handbooks, dictionaries, bibliographies, etc.) pertaining to abstract harmonic analysis 18

43-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to abstract harmonic analysis 75

43-03 History of abstract harmonic analysis [Consider also classification numbers pertaining to Section 01-XX] 65

43A60 Almost periodic functions on groups and semigroups and their generalizations (recurrent functions, distal functions, etc.); almost automorphic functions 981

43A65 Representations of groups, semigroups, etc. (aspects of abstract harmonic analysis) [See also 22A10, 22A20, 22Dxx, 22E45] 1133