MCI Communications

MCI Communications Corporation, originally known as Microwave Communications Inc., was a major telecommunications company in the United States. Founded in 1963, MCI began as a provider of microwave long-distance services. Over time, it evolved to become one of the largest long-distance telecommunications companies in the country, particularly known for its innovative approach to voice communications and data services. MCI was notable for being one of the first companies to challenge AT&T's monopoly on long-distance telephone services.