3D Systems, headquartered in Rock Hill, South Carolina, is a company that engineers, manufactures and sells 3D printers. Chuck Hull, currently the CTO and former president, invented stereolithography in 1986. 3D Systems creates product concept models, precision and functional prototypes, master patterns for tooling, as well as production parts for direct digital manufacturing. 3D Systems uses proprietary processes to fabricate physical objects using input from computer-aided design and manufacturing software, or 3D scanning and 3D sculpting devices.