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 82
43-03 History of abstract harmonic analysis [Consider also classification numbers from Section 01-XX] 71
43A60 Almost periodic functions on groups and semigroups and their generalizations (recurrent functions, distal functions, etc.); almost automorphic functions 1203
43A65 Representations of groups, semigroups, etc. (aspects of abstract harmonic analysis) [See also 22A10, 22A20, 22Dxx, 22E45] 1271