"Cambridge Information Group (CIG) is a privately owned group of information services and publishing companies and educational institutions. It was founded in 1971 by Robert N. Snyder and Philip E. Hixon and is headquartered in Bethesda, Maryland. As of 2007, CIG\u2019s operating companies are ProQuest, R.R. Bowker, and CIG Education Group. CIG Education Group is the owner of the Sotheby's Institute of Art, and Bach to Rock music school (B2R). CIG is also the largest shareholder of Navtech, Inc."@en .