• 32 Videos, Slides, Films

• 20 Biotechnology
• 12 Technology
• 10 Study and teaching
• 9 Environmental sciences
• 9 Geology
• 9 Methodology
• 9 Physics
• 8 Chemistry
• 8 Science
• 7 Physical geography
• 6 Experiments
• 6 Medicine
• 6 Social aspects
• 5 Anthropology
• 4 Crime
• 4 Forecasting
• 4 Politics and government
• 4 Psychology
• 4 Social control
• 4 Sociology
• 3 Mathematics
• 3 Vocational guidance
• 2 Applied mathematics

• 32 Films Media Group
• 9 Parthenon Entertainment (Firm)
• 4 Uniview Worldwide
• 3 Cambridge Educational (Firm)
• 2 Public Broadcasting Service (U.S.)
• 1 Carolina Bioloical Supply Co
• 1 Filmoption International (Firm)
• 1 Infobase
• 1 La Compagnie des Taxi-Brousse
• 1 Looking Glass Pictures
• 1 MacNeil/Lehrer Productions

• 32 English

• 5 United States
• 1 Ghana

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