Lexicon is an American company that engineers, manufactures, and markets audio equipment as a brand of Harman International Industries, a subsidiary of South Korea-based firm Samsung Electronics. The company was founded in 1971 and headquartered in Waltham, Massachusetts with offices in Salt Lake City. It was acquired by Harman in 1993. Lexicon traces its history to the 1969 founding of American Data Sciences by MIT professor Dr. Francis F. Lee and engineer Chuck Bagnaschi, developers of digital audio devices for medical heart monitoring.