• 27 Videos, Slides, Films

• 27 Electricity
• 11 Study and teaching
• 6 Electrical wiring
• 6 Waves
• 4 Electronics
• 4 Natural resources
• 4 Perception
• 4 Power resources
• 4 Senses and sensation
• 3 Energy conservation
• 3 Geometry
• 2 Light
• 2 Mirrors
• 1 Astronomy
• 1 Atmosphere
• 1 Chemistry
• 1 Color
• 1 Composition (Photography)
• 1 Computer architecture
• 1 Computer engineering
• 1 Computer input-output equipment
• 1 Computers
• 1 Discoveries in science
• 1 Drawing

• 27 Films Media Group
• 27 Films for the Humanities & Sciences (Firm)
• 6 Video Education Australasia
• 4 Liacos Educational Media
• 3 Allegro Productions (Firm)
• 3 Open University
• 3 Shopware (Firm)
• 1 4 Learning (Firm)
• 1 Infobase
• 1 Institution of Electrical Engineers
• 1 National Geographic Television & Film
• 1 Northey Productions Ltd

• 27 English

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