Texas Instruments
In 1930, J. Clarence Karcher and Eugene McDermott founded Geophysical Service, an early provider of seismic exploration services to the petroleum industry. In 1939, the company reorganized as Coronado Corp., an oil company with Geophysical Service Inc (GSI), now as a subsidiary. On December 6, 1941, McDermott along with three other GSI employees, J. Erik Jonsson, Cecil H. Green, and H.B. Peacock purchased GSI. During World War II, GSI expanded their services to include electronics for the U.S. Army, Signal Corps, and the U.S. Navy. In 1951, the company changed its name to Texas Instruments, with GSI becoming a wholly owned subsidiary of the new company.
Atec, Inc.
Atec was founded in 1953 as Accurate Instrument Co. and was officially incorporated in the state of Texas on July 13, 1956. Accurate Instrument Co. primarily manufactured instrumentation for the aviation industry. Some notable products included a standard day instrument (used to provide automated correlations to standard sea level atmospheric conditions), signal generators, frequency counters, oscillators, and pressure test sets.