Hardi Meybaum is the founder of GrabCAD, a social network for engineers. Some key events in CAD history include the introduction of Unigraphics II in 1983. STEP was developed in 1983 to allow transfer of CAD data between systems. Autodesk shipped early versions of AutoCAD in 1983-1984. In 1984, DUCT continued development in the UK and a Hungarian physicist smuggled Macs into his country to develop early 3D CAD software. GrabCAD was founded to enable collaboration between engineers and help users find engineering work.