A projector is a device that can take images and videos by using any other device like phones, tablets, or computers and make the image show up on the wall or a board.
You can use a projector to present a Presentation on a large screen so everyone can see it clearly.
You can learn more in https://www.computerhope.com/jargon/p/projecto.
this relate to engineering because engineers have to come up with new designs to make it easier to deal and work with.
