Closed captioning is the process of adding textual information to programs to make them accessible to individuals who can't hear or translate the audio portion. Most closed captioning services are available only to viewers who subscribe to them, which is why they're called "closed."
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Joe Clark: Media Access
Large collection of writings by a recognized expert on accessibility issues related to TV, movies, and the Internet.
The Media Access Mailing List
Subscription information for list dedicated to closed-captioning, audio description, Web, CD-ROM, multimedia access, and related issues.