Mannerisms

Six of  ten had been in the top ten rankings of manufacturers of vacuum tubes (thermionic valves) they were: GE, Westinghouse, Western Electric, RCA,  Sylvania and Philco  - all six successfully making the transition from vacuum tubes to transistors. The earliest companies to get into transistor manufacturing which had never been in the vacuum tube manufacturing business were TI, Motorola, Transitron, Hughes, Clevite and Germanium Products (which set up solely to make transistors for hearing aids). So the 1955 Semiconductor Top Ten were: