Close up view of an old cathode ray tube monitor showing a pixelated offline message, with signal interference, static noise, and flickering effects creating a retro technological aesthetic

Vintage cathode ray tube monitor displaying neon green terminal screen data at night

Cathode-ray tube A cathode-ray tube is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. The images may represent electrical waveforms, pictures, radar targets, or other phenomena. A CRT on a television set is commonly called a picture tube. | Ejaz Trader