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Use "projectors" in a sentence
"Now, my experience with projectors is that gosh, all the blood falls out of your arms while you're using one, but you can do things of all sizes with a projector, which you can't so much with a lightboard."
"The humming of the projectors was the only discernible sound."
"Data projectors are also fairly good for showing movies on larger screens -- just run a video output from the in-class VCR/DVD player into the projector, select Video One, and ya 'gotta show!"