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1972 – PBS begins study of Line 21 closed captioning, funded by HEW (Open captioning rejected by networks)
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1975 – NCLD files Deaf Watch petition for access to emergency broadcasts
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1976 – FCC approves Line 21 for closed captioning services
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1976 – FCC amends rules to require visual access to emergency notices of the Emergency Broadcasting System
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1977-1980s – Gottfried/Meyer cases
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1980 – ABC, NBC begin to provide closed captioning (CBS wants to use teletext – begins CC in 1984).
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TeleCaption Decoders available ($250- separate; $500 integrated with television set)