DIPPR, a Sponsored Research group of AIChE, has made a significant impact on the chemical process industries toy improving thermodynamic and physical property data for process engineering. Participating organizations include chemical and petroleum producers, engineering contractors, software vendors, and government agencies. Projects are proposed and funded by interested DIPPR participants. By involvement of participants, guidance by project sponsors, annual accountability, and dissemination of project results, DIPPR has enjoyed continued success in satisfying industry data needs.