Overhead Projector 1960 (1 jan 1960 ano – 31 jan 1960 ano)

Descrição:

Overhead projector is a presentation device that projects the enlarged image of writing or drawing on clear or transparent film placed on it onto a wall or screen by means of an overhead mirror. It is a variant of slide projector that is used to display images to an audience.
Experience:
We have all been exposed to overhead projectors since before using powerpoint presentations and other media, churches used to use this projector to show the audience the lyrics and responses to songs in mass. Projectors like this can also been in CDU classrooms but they are not being used anymore.

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