What component is in a tablet or phone that wouldn’t have been in a desktop

On early television stations, what typically filled the screen from around 11pm until 6am? test dummies test patterns tests testing colors

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.

Healthy study habits are best described as