This historic display technology works by firing a focused beam of electrons at a phosphor-coated glass face. Magnetic deflection coils sweep the beam rapidly across the screen in a raster pattern to draw images. Though bulky and power-hungry, they are still prized in specific retro-gaming and legacy industrial systems for their zero input lag and natural motion handling.
Heard on the job
Be careful discharging that old CRT before you pull the chassis, the anode cap holds a massive charge.