Wiktionary
overhead projectors
n. (overhead projector English)
Usage examples of "overhead projectors".
Finally, they discovered what a whiz he was with machines and promoted him to repairing overhead projectors and air conditioners.
He took her hand again as the lightshow faded from the overhead projectors.
The corps of Jewish merchants who were Grantville's coffee lifeline to Istanbul had taken to PowerPoint and overhead projectors in a way that made Mike despair of the soul of early modern capitalism.