Projector may refer to:
- Video projector, a device that projects a video signal from computer, home theater system etc.
- Movie projector, a device that projects moving pictures from a filmstrip
- Slide projector, a device that projects a still image with a transparent base
- Overhead projector, a device that projects a transparent image
- Opaque projector, a predecessor to the overhead projector
- Magic lantern, a historic projection device
- Enlarger, a device used to produce photographic prints from negatives
- Ceiling projector, a device used to measure the height of clouds
- Projector (album), an album by Dark Tranquility
- A type of mortar (weapon)
- A version control system used in the Macintosh Programmer's Workshop
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