Patrick J. Hanratty is an American computer scientist and businessperson who is known as the "Father of CAD/CAM"—computer-aided design and computer-aided manufacturing. As of 2013 he is President and CEO of Manufacturing and Consulting Services (MCS) of Scottsdale, Arizona, a company he founded. According to the University of California in 2012, industry analysts think that "70 percent of all 3-D mechanical CAD/CAM systems available today trace their roots back to Hanratty’s original code".