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.
Tartan Laboratories
Starting in 1985, Tartan had developed a relationship with Texas Instruments, and then in 1988 a main focus of the company became the development of Ada cross-compilers for digital signal processing (DSP) chips. These were for the Texas Instruments TMS320 series, specifically the C3x and C4x lines of processors. Within a few years, Tartan would become the first company to validate Ada compilers for DSPs.