On October 18, 1954 the Regency TR-1 put music in your pocket for the first time.
Old portable radios were marvels of technology from the 1950s to the 1980s - Click Americana
I had a transistor radio in the early 60's just like it. : r/nostalgia
Mountaineer Conrad Anker's First Watch
It's Sixty Years Since the First Portable Transistor Radio Went on the Market and Started a Revolution
How The Sony Transistor Radio Changed The World – or at least some of it. – Graham Thomas
The story of Sony: from repair shop to revolution, how Walkman inventor changed music listening and, with PlayStation, home entertainment
The transistor revolution: how transistors changed the world
Welcome to Hagley Museum & Library
History of Mobile Phones: From Evolution to a Revolution