Overhead Projectors
- Period of Use: Late 1800s to 2010s
- Made Obsolete By: Computers, Better Projection Systems
It is likely many of us are old enough to remember overhead projectors being used in our classrooms at school. They used to be used for several things too. We’d use them to display information, such as mathematical material, where the instructor felt you’d benefit from the larger screen. They’d also be used for some other stuff similar to this. Moreover, they’d be used to show videos in class at times too. This might be done by a slide projector if the overhead didn’t have one connected.