CPE Dictionary: 1  Official CPE Dictionary v2.3 - 35.72MB, Updated: 9/2/2017 12:00:00 AM EST - gz format, zip format. 2  Official CPE Dictionary v2.2 - 37.26MB, Updated: 9/2/2017 12:00:00 AM EST - gz format, zip format. 3  CPE Dictionary Search. 4  CPE Dictionary Growth Statistics.
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.
The use of radio as a standalone word dates back to at least December 30, 1904, when instructions issued by the British Post Office for transmitting telegrams specified that The word 'Radio'... is sent in the Service Instructions.