• 1 DVDs

• 12 Technology
• 6 Documentary films
• 2 Air conditioning
• 2 Communication
• 2 Electric lighting
• 2 Glass
• 2 Information technology
• 2 Inventions
• 2 Printing
• 2 Public health
• 2 Recording and reproducing
• 2 Refrigeration and refrigerating machinery
• 2 Sound
• 2 Time measurements
• 1 Brand, Stewart
• 1 Business
• 1 Business ethics
• 1 Counterculture
• 1 Drinking water
• 1 Economics
• 1 English language
• 1 Environmentalists

• 8 Public Broadcasting Service (U.S.)
• 7 Films Media Group
• 7 Johnson, Steven, 1968-
• 7 Lovering, Peter
• 6 Kanopy (Firm)
• 4 Jones, Julian
• 3 Olding, Paul, 1973-
• 2 British Broadcasting Corporation
• 2 Stacey, Nic
• 1 Alvarado, David (David Anthony)
• 1 BBC Worldwide Learning
• 1 Barro, Andri
• 1 Brand, Stewart
• 1 Copp, Duncan
• 1 Crash Course Media Literacy
• 1 Encyclopaedia Britannica, Inc.
• 1 Goldwyn, Edward
• 1 Infobase
• 1 Jackson, Michael, 1958 February 11-
• 1 McLean, Kate
• 1 Meltzer, Jamie
• 1 Michaels, Kasper, 1967-
• 1 Mirror/Mirror Productions, Inc. (Firm)
• 1 Nutopia (Firm)
• 1 Oregon Public Broadcasting

• 2 United States
• 1 Earth (Planet)

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