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A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Following their development in 1954, made possible by the invention of the transistor in 1947, they became the most popular electronic communication device in history, with billions manufactured during the 1960s and 1970s.
When one thinks of the most significant dates in our technological development, October 18, 1954 doesn't pop up there at the top of the list. It should; 60 years ago the first portable transistor radio went on sale. The Regency TR1 was the first consumer device to use transistors. According to Fortune Magazine,  If you owned one, you were the coolest thing on two legs.. The big radio companies weren't interested in the transistor.