Some of us can recall watching Educational TV as students. I taught using overhead projectors and transparencies. Join ST's Telegram channel and get the latest breaking news delivered to you.

Startup Valerion ended last year by claiming the crown for the most-funded projector campaign so far on Kickstarter with a ...

Caleigh Waldman for NYT Wirecutter Your luggage sees a lot: dirty airplane floors, dusty overhead compartments, the mysteries of cargo holds and suitcase sorting facilities.

The set for "The 4th Witch" is a stage laid bare: A row of vintage overhead projectors that you would see in the classroom and tables laden with shadow puppets and props fill up a solid third of ...