The linotype machine was revolutionary, allowing typesetters to do their jobs at speeds that were unheard of in the days of hand-setting type. All but extinct now, they are marvels of pre-digital industrial engineering.
If you're interested in linotype machines, check out the documentary Linotype. It's kind hard to track down, but well worth it. Here's the trailer:
Or check out this short film about the last newspaper in America set on a linotype:
Or if you prefer your linotype information in text format and on the speculative side, check out Eileen Gunn's list of five SF stories about linotype machines, including the aforementioned Brown shorts.