Today is the 55th anniversary of the debut of the first pocket-sized transistor radio. The Regency TR-1 was developed by Texas Instruments. They offered their prototype around to the major radio manufacturers but no one was interested.
It went on sale in November of 1954 for $49.95 (about $400 in todays dollars) but they still managed to sell about 150,000 units.
Prices dropped in the 60s when Hong Kong started mass producing what we called simply "transistors". Every kid had to have one. Lots more at Wikipedia.
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