An electron tube evacuated to a high degree of vacuum. For the next 60 years, television cameras used vacuum tubes. In broadcast color cameras, the light streaming through the lens enters a prism, which does the usual prism thing, splitting the light into three colors. A device which fires a stream of electrons toward a fluorescent screen. There is a ray gun at the back of the picture tube firing a thin beam to light up a tiny dot on your screen.
All magnetic recording begins with an electromagnet called a record head.
The process of dividing into segments. He could get rid of segmentation by a nice long scan with a tape wrapped around this big drum. And these days you use the word agents to do that. Computer instructions, customized to the preferences of an individual. And the term agent refers to Intelligence Search Software that will be programmed to know what each family member likes.