Short answers, pulled from the story.
The first documented use of the term broadcasting to describe one-to-many radio transmissions appeared in 1898. A writer in The Electrician noted the advantage of being able to shout a message and spread it broadcast to receivers in all directions.
Italian inventor Guglielmo Marconi began developing wireless communication using radio waves in 1894. On the 17th of December 1902, a transmission from the Marconi station in Glace Bay, Nova Scotia, Canada, became the world's first radio message to cross the Atlantic from North America.
On the 25th of March 1925, John Logie Baird demonstrated the transmission of moving pictures at the London department store Selfridges. This event marked the first public demonstration of television and relied upon the Nipkow disk to form the basis of experimental broadcasts.
The world's technological capacity to receive information through one-way broadcast networks more than quadrupled during the two decades from 1986 to 2007. This capacity grew from 432 exabytes of optimally compressed information to 1.9 zettabytes, representing an increase from 55 newspapers per person per day in 1986 to 175 newspapers per person per day by 2007.
Commercial broadcasting operates as a for-profit enterprise supported by the sale of air time to advertisers. Public broadcasting is usually non-profit and publicly owned, supported by license fees, government funds, and grants. Community broadcasting is a form of mass media in which a television station or radio station is owned, operated, or programmed by a community group to provide local programming.
The first regular television broadcasts started in 1937. American radio-network broadcasters habitually forbade prerecorded broadcasts in the 1930s and 1940s, requiring radio programs played for the Eastern and Central time zones to be repeated three hours later for the Pacific time zone.