What is "eg&g"

EG&G, formally known as Edgerton, Germeshausen, and Grier, Inc., was a United States national defense contractor and provider of management and technical services. The company was involved in contracting services to the United States government during World War II and conducted weapons research and development after the war. Its close involvement with some of the government's most sensitive technologies has led to its being cited in conspiracy theories related to Department of Defense black projects.