Energistics, formerly known as the Petrotechnical Open Standards Consortium (POSC), is a not-for-profit membership organization with 80 current members representing all segments of the upstream oil and gas industry, as well as government agencies, industry associations, and academia. Upstream exploration and production (E&P) is the primary area of interest for the Energistics community, including an E&P business process reference model; E&P catalogue standards; reference data standards; and XML exchange standards, design guidelines and profiles, the most prominent of which are WITSML and PRODML. Members participate in a number of Special Interest Groups (SIGs) whose efforts are concentrated around drilling, production, data management, regulatory, geophysics, and other relevant areas of interest.