ACM SIGGRAPH is the international Association for Computing Machinery's Special Interest Group on Computer Graphics and Interactive Techniques based in New York. It was founded in 1969 by Andy van Dam (its direct predecessor, ACM SICGRAPH was founded two years earlier in 1967). ACM SIGGRAPH convenes the annual SIGGRAPH conference, attended by tens of thousands of computer professionals. The organization also sponsors other conferences around the world, and regular events are held by its professional and student chapters in several countries.