D - World History and History of Europe, Asia, Africa, Australia, New Zealand, Etc.

Subclass D	History (General)
Subclass DA	Great Britain
Subclass DAW	Central Europe
Subclass DB	Austria - Liechtenstein - Hungary - Czechoslovakia
Subclass DC	France - Andorra - Monaco
Subclass DD	Germany
Subclass DE	Greco-Roman World
Subclass DF	Greece
Subclass DG	Italy - Malta
Subclass DH	Low Countries - Benelux Countries
Subclass DJ	Netherlands (Holland)
Subclass DJK	Eastern Europe (General)
Subclass DK	Russia. Soviet Union. Former Soviet Republics - Poland
Subclass DL	Northern Europe. Scandinavia
Subclass DP	Spain - Portugal
Subclass DQ	Switzerland
Subclass DR	Balkan Peninsula
Subclass DS	Asia
Subclass DT	Africa
Subclass DU	Oceania (South Seas)
Subclass DX	Romanies

Library of Congress Classification