• The Pre-War Years: From the Start
• The 1940's: This is the Moment
• The 1950's: At the Beginning
• The 1960's: Top of the World
• The 1970's: Tragedy
• The 1980's: Come Out of the Rain
• The 1990's: Destiny
• The New Millennium: Here to Stay

Sources: Pinoy Television: The Story of ABS-CBN (ABS-CBN Publishing), Radio-Roots of Broadcasting, Emergic - Filipino Radio,  Wikipedia Articles on WRGB (of United States' CBS), Radio, Broadcasting-History and TV-Introduction-Summary of First Countries

Alexander Graham Bell demonstrates the telephone, ushering in the broadcasting age, and the eventual dawning of television.

1897

Guglielmo Marconi establishes the world's first radio station on the Isle of Wight in the United Kingdom.

1906

The first time a significantly powerful signal carrying voice and music takes place, when Reginald Fessenden made a Christmas Eve broadcast to ships at sea from Massachusetts in United States. 

1909

First documented radio transmission begins at KCBS in San Jose in the United States (now of CBS of the United States). 

1920

Broadcasting begins in Europe as the BBC of the United Kingdom becomes the world's first broadcaster.

1923

Radio Ceylon (now Sri Lanka Broadcasting Corporation) becomes the first radio station, and the oldest broadcaster, in Asia.

1925

John Logie Baird invents television.

1928

Broadcasting in the Philippines begins, as the Manila Broadcasting Corporation is the first broadcaster in the Philippines, via its legendary radio station--the first Philippine radio station DZRH--with the Elizalde family buying it from its American owners later on.

January 13: The United States becomes the world's first nation to introduce TV. WRGB, the first TV station of CBS, becomes the world's first television station.