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What are those things called?

What are those machines called that project your computer screen onto a screen on the wall for a presentation? I need to know what they're called, pros and cons and how they work as I need to develop some presentations. I haven't done anything like this since I used slides, so I'm starting from scratch.

bkay

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Comments
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Try LCD projector

I don't know why they are called that as they generally use a special incandescent lamp.

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Projectors

There are different types of projectors, the most common are overhead projectors, LCD projectors and DLP projectors. The latter two are generally used in conjuction with computer hook ups, the overhead type are used with transparencies.

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Here . . .
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BTW . . .

The good ones will display 1080 resolution and can double as a movie theater projector for your Blu-ray player.

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