DDC Thousands 900 - 999
900 History & geography TF1 ; TF2
901 Philosophy & theory TF1 or TF2 – TF5 or TT [DDC thus conflates four distinct relationships]
902 Miscellany
903 Dictionaries & encyclopedias TF1 or TF2 – T4b or T4a
904 Collected accounts of events Σ→iprt / TF1
905 Serial publications TF1 or TF2 – T4h
906 Organizations & management PI4 (TF1 or TF2)
907 Education, research & related topics TF1 or TF2 – PE
908 Kinds of persons treatment TF1 or TF2 ^ I
909 World history N1a – TF1
910 Geography & travel TF2 ; →ia N2 > GM0 (N2d) [as in 306.481 25]
911 Historical geography TF1 ^ TF2
912 Atlases, maps, charts & plans ΣT4d ; T4d
913 Geography of & travel in ancient world N2j specify – TF2; (→ia N2 > GM0 (N2d)) > N2j specify
914 Geography of & travel in Europe N1be – TF2; (→ia N2 > GM0 (N2d)) > N1be
915 Geography of & travel in Asia N1ba – TF2; (→ia N2 > GM0 (N2d)) > N1ba
916 Geography of & travel in Africa N1bf – TF2; (→ia N2 > GM0 (N2d)) > N1bf
917 Geography of & travel in North America N1bn – TF2; (→ia N2 > GM0 (N2d)) > N1bn
918 Geography of & travel in South America N1bs – TF2; (→ia N2 > GM0 (N2d)) > N1bs
919 Geography of & travel in other areas N1 specify – TF2; (→ia N2 > GM0 (N2d)) > N1 specify
920 Biography, genealogy & insignia I -- TF1 ; T4 ! SF ^ N2k ; SF – EI7t
921 (Optional number)
922 (Optional number)
923 (Optional number)
924 (Optional number)
925 (Optional number)
926 (Optional number)
927 (Optional number)
928 (Optional number)
929 Genealogy, names & insignia T4 ! SF ^ N2k ; SF – EI7t
930 History of ancient world to ca. 499 N2j-05 – TF1
931 China to 420 N1ccn > N2j-04 – TF1 [The remaining entries are treated as if historical; TF2 would signal geography; other links could be provided as appropriate.]
932 Egypt to 640 N1ceg > N2j-06 – TF1
933 Palestine to 70 N1cps > N2j-01 – TF1
934 India to 647 N1cin > N2j-07 – TF1
935 Mesopotamia & Iranian Plateau to 637 N1cir > N2j-07 – TF1
936 Europe north & west of Italy to ca. 499 N1be (N3nw) > N2j-05 – TF1
937 Italy & adjacent territories to 476 N1cit > N2j-05 – TF1
938 Greece to 323 N1cgr > N2j-03 – TF1
939 Other parts of ancient world to ca. 640 Specify > N2j-07 – TF1
940 History of Europe N1be – TF1
941 British Isles N1cgr + ei – TF1
942 England & Wales N1cgr – TF1
943 Central Europe; Germany N1be (N3c) – TF1 ; N1cde – TF1
944 France & Monaco N1cfr – TF1
945 Italian Peninsula & adjacent islands N1cit – TF1
946 Iberian Peninsula & adjacent islands N1ces or pt – TF1
947 Eastern Europe; Russia N1be (N3e) – TF1 ; N1cru – TF1
948 Scandinavia N1be (N3n) – TF1
949 Other parts of Europe Specify – TF1
950 History of Asia; Far East N1ba – TF1
951 China & adjacent areas N1ccn – TF1
952 Japan N1cjp – TF1
953 Arabian Peninsula & adjacent areas N1ba (N3sws) – TF1 ; N1csa – TF1
954 South Asia; India N1ba (N3s) – TF1 ; N1cin – TF1
955 Iran N1cir – TF1
956 Middle East (Near East) N1ba (N3sw) – TF1
957 Siberia (Asiatic Russia) N1cru (N3e) – TF1
958 Central Asia N1ba (N3c) – TF1
959 Southeast Asia N1ba (N3se) – TF1
960 History of Africa N1bf – TF1
961 Tunisia & Libya N1ctn – TF1 ; N1cly – TF1
962 Egypt & Sudan N1ceg – TF1 ; N1csd – TF1
963 Ethiopia & Eritrea N1cet – TF1 ; N1cer – TF1
964 Northwest African coast & offshore islands N1bf (N3nw) – TF1
965 Algeria N1cdz – TF1
966 West Africa & offshore islands N1bf (N3w) – TF1
967 Central Africa & offshore islands N1bf (N3c) – TF1
968 Southern Africa; Republic of South Africa N1bf (N3s) – TF1 ; N1cza – TF1
969 South Indian Ocean islands NT1i > NT3oi – TF1
970 History of North America N1bn – TF1
971 Canada N1cca – TF1
972 Middle America; Mexico N1bn (N3s) – TF1 ; N1cmx – TF1
973 United States N1cus – TF1
974 Northeastern United States N1cus (N3ne) – TF1
975 Southeastern United States N1cus (N3se) – TF1
976 South central United States N1cus (N3sc) – TF1
977 North central United States N1cus (N3nc) – TF1
978 Western United States N1cus (N3w) – TF1
979 Great Basin & Pacific Slope region N1cus (N3wc) – TF1
980 History of South America N1bs – TF1
981 Brazil N1cbr – TF1
982 Argentina N1car – TF1
983 Chile N1ccl – TF1
984 Bolivia N1cbo – TF1
985 Peru N1cpe – TF1
986 Colombia & Ecuador N1cco – TF1 ; N1cec – TF1
987 Venezuela N1cve – TF1
988 Guiana N1cgy – TF1
989 Paraguay & Uruguay N1cpy – TF1 ; N1cuy – TF1
990 History of other areas Specify – TF1
991 [Unassigned]
992 [Unassigned]
993 New Zealand N1cnz – TF1
994 Australia N1cau – TF1
995 Melanesia; New Guinea NT1i > NT3op (N3sw) – TF1 ; N1cpg – TF1
996 Other parts of Pacific; Polynesia NT1i > NT3op (N3se) – TF1
997 Atlantic Ocean islands NT1i > NT3oa – TF1
998 Arctic islands & Antarctica NT1i > NT3or – TF1 ; N1bt – TF1
999 Extraterrestrial worlds NT6i