• 36 History
• 26 Commerce
• 25 Economic conditions
• 23 Power (Social sciences)
• 8 Economic history
• 8 Indians of North America
• 5 Immigrants
• 5 Politics and government
• 4 African Americans
• 4 Imperialism
• 3 Emigration and immigration
• 3 Industrialization
• 3 Labor
• 3 Political science
• 3 Politicians
• 3 Religious leaders
• 3 Social institutions
• 2 Ethnicity
• 2 Frontier and pioneer life
• 2 Industries
• 2 Louisiana Purchase
• 2 Manifest Destiny
• 2 Mexican War, 1846-1848
• 2 Religions

• 34 Films Media Group
• 34 Films for the Humanities & Sciences (Firm)
• 10 Public Broadcasting Service (U.S.)
• 8 Infobase
• 5 KERA Dallas/Ft. Worth (Television station)
• 4 Arts and Entertainment Network
• 3 A&E Television Networks, LLC
• 3 Crash Course US History
• 3 Green, John
• 3 Knowledgemotion Ltd.
• 2 Dallas TeleLearning (Firm)
• 2 Dyer, Julia
• 2 Encyclopaedia Britannica, Inc.
• 2 Leonard, Melinda
• 1 ABC News Productions
• 1 Bride Media International
• 1 Burns, Ken, 1953-
• 1 Essence of History, LLC
• 1 MacNeil/Lehrer Productions
• 1 Marshall University
• 1 Sale, Jennifer
• 1 Sideways Film

• 41 English

• 41 United States
• 8 West (U.S.)
• 1 California
• 1 North America
• 1 Pleasant Hill (Ky.)
• 1 San Antonio, Texas
• 1 Transcontinental Railroad National Back Country Byway (Utah)

• 34 Internet videos
• 29 Videorecording
• 11 Video recordings for the hearing impaired
• 5 Video recording
• 2 Documentary films
• 2 Short films
• 1 Biography
• 1 Early works to 1800
• 1 Film excerpts

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