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Audiovisual aids began to emerge in the early 20th century with the advent of technologies such as film and radio, which allowed for the combination of visual and auditory elements in education and communication. The use of slides and projectors gained popularity in the 1920s and 1930s, enhancing classroom instruction. The development of television in the mid-20th century further revolutionized audiovisual aids, making them a staple in both educational and entertainment settings. Today, digital technologies continue to expand the possibilities for audiovisual aids in various fields.

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1mo ago

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