"It was those Teletype machines"
Military version of the Teletype Model 15, known as the TG-7-B - Credit: Raj & Neja
Teletype was a common term applied to the teleprinter, an electromechanical typewriter (or printing telegraph) that would print out a message sent from a distant point by electrical connection, and later by radio or microwaves. In the decades before the personal computer and the Internet, teleprinters were the primary form of printed communications for the military, business, and print news media.
Actually a trademark, the name “Teletype” belonged to Teletype Corporation of Skokie, Illinois, a descendant of the earlier Morkrum-Kleinschmidt Company, but came into common usage for the product it described, like Kleenex or Xerox.