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.
History of AT&amp;T
In 1925, AT&T created a new unit called Bell Telephone Laboratories, commonly known as Bell Labs. This research and development unit proved highly successful, pioneering, among other things, radio astronomy, the transistor, the photovoltaic cell, the Unix operating system, and the C programming language. AT&T ranked 13th among United States corporations in the value of World War II military contracts. In 1949, the Justice Department filed an antitrust suit aimed at forcing the divestiture of Western Electric, which was settled seven years later by AT&T's agreement to confine its products and services to common carrier telecommunications and license its patents to "all interested parties." A key effect of this was to ban AT&T from selling computers despite its key role in electronics research and development. Nonetheless, technological innovation continued. For example, AT&T commissioned the first experimental communications satellite, Telstar I in 1962.