• 8 Videos, Slides, Films

• 1 DVDs

• 6 History
• 6 Technological innovations
• 2 Air conditioning
• 2 Glass
• 2 Inventions
• 2 Recording and reproducing
• 2 Refrigeration and refrigerating machinery
• 2 Sound
• 2 Time measurements
• 1 Artificial intelligence
• 1 Electric lighting
• 1 Evolution
• 1 Human beings
• 1 Information technology
• 1 Inventors
• 1 Jeopardy! (Television program)
• 1 Public health
• 1 Sanitary engineering
• 1 Technology and civilization
• 1 World Wide Web

• 6 Films Media Group
• 2 Films for the Humanities & Sciences (Firm)
• 2 Infobase
• 1 Barro, Andri
• 1 British Broadcasting Corporation
• 1 Copp, Duncan
• 1 Jackson, Michael, 1958 February 11-
• 1 Johnson, Steven, 1968-
• 1 Jones, Julian
• 1 Lovering, Peter
• 1 Michaels, Kasper, 1967-
• 1 Nutopia (Firm)
• 1 Olding, Paul, 1973-
• 1 Oregon Public Broadcasting
• 1 PBS Distribution (Firm)
• 1 Petterle, Diene
• 1 Root, Jane
• 1 Stacey, Nic
• 1 Watkins, Ed (Edward)

• 8 English

• 1 Earth (Planet)

• 6 Educational films
• 6 Internet videos
• 5 Video recordings for the hearing impaired
• 2 Documentary television programs
• 2 Science television programs
• 2 Videorecording
• 1 Educational television programs
• 1 Feature films
• 1 Nonfiction television programs

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