• 81 Videos, Slides, Films

• 43 Study and teaching
• 32 Research
• 21 Biotechnology
• 15 Physics
• 14 Chemistry
• 13 Technology
• 12 Environmental sciences
• 11 Physical geography
• 11 Science
• 9 Geology
• 9 Methodology
• 9 Physiology
• 8 Anatomy
• 8 Experiments
• 7 Biodiversity
• 7 Genetics
• 7 Reproduction
• 6 Anthropology
• 6 Evolution (Biology)
• 6 Heredity, Human
• 6 Mathematics
• 6 Medicine
• 6 Social aspects
• 6 Vocational guidance

• 81 Films Media Group
• 9 Cambridge Educational (Firm)
• 9 Parthenon Entertainment (Firm)
• 6 BBC Worldwide Ltd
• 5 German United Distributors
• 4 Canadian Broadcasting Corporation
• 4 Infobase
• 4 MacNeil/Lehrer Productions
• 4 National Geographic Television & Film
• 4 Open University
• 4 Public Broadcasting Service (U.S.)
• 4 Uniview Worldwide
• 1 ABC News Productions
• 1 Carolina Bioloical Supply Co
• 1 Filmoption International (Firm)
• 1 Goldhil Video (Firm)
• 1 Joy of Giving Something, Inc
• 1 La Compagnie des Taxi-Brousse
• 1 Looking Glass Pictures
• 1 Nobel Media AB (Firm)
• 1 Paper Tiger Television Collective (Firm)
• 1 Richardson, Robert, Jr
• 1 Standard Deviants (Performing group)
• 1 Video Education Australasia

• 81 English

• 6 United States
• 2 Hawaii
• 2 South America
• 1 Galaxies
• 1 Ghana
• 1 Mexico
• 1 Outer space
• 1 Solar system
• 1 Tanzania

• 81 Educational films
• 81 Internet videos
• 80 Videorecording
• 32 Video recordings for the hearing impaired
• 1 Fiction
• 1 Interviews
• 1 Video recording

Limit year range