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  2. Broadcasting - Wikipedia

    en.wikipedia.org/wiki/Broadcasting

    Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model.

  3. Educational technology - Wikipedia

    en.wikipedia.org/wiki/Educational_technology

    Educational technology is an inclusive term for both the material tools, processes, and the theoretical foundations for supporting learning and teaching.Educational technology is not restricted to high technology but is anything that enhances classroom learning in the utilization of blended, face to face, or online learning.