The term 'Trinitrons, E.G.' refers to a type of television developed by Sony Corporation. The term is derived from the company's Trinitron brand of televisions, which were first released in 1968 and featured a unique three-gun electron gun system that allowed for improved picture quality. This technology was revolutionary at the time and helped Sony become one of the leading television manufacturers in the world. The five-letter solution to this crossword is 'SONYS'.