HIS000000 - General
HIS001000 - Africa / General
HIS002000 - Ancient / General
HIS003000 - Asia / General
HIS004000 - Australia & New Zealand
HIS005000 - Europe / Baltic States
HIS006000 - Canada / General
HIS007000 - Latin America / Central America
HIS008000 - Asia / China
HIS009000 - Middle East / Egypt
HIS010000 - Europe / General
- - -
HIS012000 - Europe / Former Soviet Republics
HIS013000 - Europe / France
HIS014000 - Europe / Germany
HIS015000 - Europe / Great Britain
HIS016000 - Historiography
HIS017000 - Asia / India & South Asia
HIS018000 - Europe / Ireland
HIS019000 - Middle East / Israel
HIS020000 - Europe / Italy
HIS021000 - Asia / Japan
HIS022000 - Jewish
HIS023000 - Asia / Korea
HIS024000 - Latin America / General
HIS025000 - Latin America / Mexico
HIS026000 - Middle East / General
HIS027000 - Military / General
HIS028000 - Native American
HIS029000 - North America
HIS030000 - Reference
HIS031000 - Revolutionary
HIS032000 - Europe / Russia & the Former Soviet Union
HIS033000 - Latin America / South America
- - -
HIS035000 - Study & Teaching
HIS036000 - United States / General
HIS037000 - World
HIS038000 - Americas - (North, Central, South, West Indies)
HIS039000 - Civilization
HIS040000 - Europe / Austria & Hungary
HIS041000 - Caribbean & West Indies / General
HIS042000 - Europe / Greece
HIS043000 - Holocaust
HIS044000 - Europe / Scandinavia
HIS045000 - Europe / Spain & Portugal
HIS046000 - Polar Regions
HIS047000 - Africa / South / Republic of South Africa
HIS048000 - Asia / Southeast Asia
HIS049000 - Essays
HIS050000 - Asia / Central Asia
HIS051000 - Expeditions & Discoveries
HIS052000 - Historical Geography
HIS053000 - Oceania
HIS054000 - Social History
HIS055000 - Middle East / Turkey & Ottoman Empire

Hints:

Multiple subjects in this and other sections may be used to describe a work fully: for example, a book about the Spanish Civil War could be assigned "HISTORY / Europe / Spain & Portugal" and "HISTORY / Military / Other"; a book about U.S. diplomacy in the 19th century could be assigned "HISTORY / United States / 19th Century" and "POLITICAL SCIENCE / International Relations / Diplomacy".