=900 History.=
901 Philosophy.
902 Compends, chronology.
903 Dictionaries.
904 Essays.
905 Periodicals.
906 Societies.
907 Education.
908 Charts.
909 Universal Histories.
=910 Geography and Description.=
911 Historical.
912 Ancient.
913 Modern.
914 _Europe._
915 _Asia._
916 _Africa._
917 _North America._
918 _South America._
919 _Oceanica and Polar Regions._
=920 Biography.=
921 Of philosophy.
922 Of theology.
923 Of sociology.
924 Of philology.
925 Of science.
926 Of useful arts.
927 Of fine arts.
928 Of literature.
929 Genealogy and Heraldry.
=930 Ancient History.=
931 Chinese.
932 Egyptian.
933 Jewish.
934 Indian.
935 Persian.
936 Keltic.
937 Roman.
938 Greek.
939 Other.
=940 Europe.=
941 Scotland and Ireland.
942 England.
943 Germany and Austria.
944 France.
945 Italy.
946 Spain and Portugal.
947 Russia.
948 Scandinavia.
949 Other.
=950 Asia.=
951 China.
952 Japan.
953 Arabia.
954 India.
955 Persia.
956 Turkey in Asia.
957 Siberia.
958 Afghanistan.
959 Other.
=960 Africa.=
96l North Africa.
962 _Egypt and Nubia._
963 _Abyssinia._
964 _Morocco._
965 _Algeria._
966 Central Africa.
967 _Guinea._
968 South Africa.
969 Other.
=970 North America.=
971 British America.
972 _Canada._
973 United States and Territories.
974 _Eastern._
975 _Middle._
976 _Southern._
977 _Western._
978 Mexico.
979 Other.
=980 South America.=
981 Brazil.
982 Argentine Republic.
983 Chili.
984 Bolivia.
985 Peru.
986 New Granada.
987 Venezuela.
988 Guiana.
989 Other.
=990 Oceanica and Polar Regions.=
991 Malaysia.
992 _Sunda._
993 Australasia.
994 _Australia._
995 _New Guinea._
996 Polynesia.
997 Isolated islands.
998 Arctic regions.
999 Antarctic regions.