The term audio visual (AV, or A/V) may refer to works with both a sound and a visual component, the production or use of such works, or the equipment used to create and present such works. PowerPoint presentations, films, and television programs are examples of audio visual presentations.
Once audio visual media came into existence, it became a part of people's everyday lives within a few decades.
Business presentations are also usually audio visual. In a typical presentation, the presenter provides the audio by speaking, and supplements it with a series of images projected onto a screen, either from a slide projector, or from a computer connected to a projector using a presentation program (software).
There has been a huge uptake of computer-based audio visual equipment in the education sector, with many schools and higher educational establishments installing projection equipment and often using interactive whiteboard technology.
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