A TV picture tube (CRT) that had a flatter viewing surface than the traditional rounder tube. Up to 30% more glass was used to make the screen flatter. Also known as a "flat screen," "flat face ...

Here’s a bulky old CRT monitor used as a touch-screen without any alterations. It doesn’t use an overlay, but instead detects position using phototransistors in the fingertips of a glove.