European Cooperation for Space Standardization

The European Cooperation for Space Standardization (ECSS) is a collaboration between the European Space Agency (ESA), the European space industry represented by Eurospace, and several space agencies, to develop and maintain a coherent, single set of user-friendly standards for use in all European space activities. Established in 1993 following a call by Eurospace to unify space products assurance standardization on a European level, it was officially adopted by the ESA on 23 June 1994 through the resolution ESA/C/CXIII/Res.1, to replace its own Procedures, Specifications and Standards (PSS) system.

Source: Wikipedia — European Cooperation for Space Standardization (CC BY-SA 4.0)