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.
CD's were introduced in 1982 and their popularity grew instantly. They started to become the most popular method for buying music by the late 80's. CDs came out around 1985 but they did not become popular till the late 90s. around the mid 90's cassettes were still prominent but cds were available.