Glassified is a clear plastic ruler with an embedded, translucent OLED screen connected to a microprocessor. Students can use it to measure and scribe straight lines and with the touch of a button ...

That check involves holding a clear plastic ruler to a display to check the speed. You can see it in his hand. If something had gone wrong. he’d have hit the large red button seen on the docking ...

Place an ordinary flat, transparent plastic ruler against the fridge front so the fridge door seal will clamp it flat between door and fridge body when you shut the door. Shut the fridge door.