Enterprise Interoperability and Enterprise Collaboration in the EEU community. Enterprise Interoperability and Enterprise Collaboration are main ingredients to support collaboration between industrial and research organisations and to integrate them in the Enlarged European Union scenario. As a matter of fact, in COIN EI and EC services are essentially targeted to SMEs and research organisations, which are an essential part of the EEU economies, and can become the infrastructural backbone to integrate research and industrial networks within the single EEU countries as well as among the whole European Union. The objective of this event is to address and collect requirements on EI/EC services from an EEU perspective, to make sure that a wide uptake is ensured in the EEU and to appraise potential common barriers in the EEU which could hamper the exploitation potential and even the participation of EEU organisations in the overall European research arena in ICT sectors (starting from the EI and EC and adjacent domains). The workshop is chaired by Sergio Gusmeroli, currently project technical manager of the COIN Project. The aim of the workshop is twofold: o To identify in the current COIN-EEU project the classes of needs and opportunities for applying EI/EC services, e.g. requirements for interoperability within and among enterprises as well as requirements for setting-up and operating collaboration among enterprises in the context of Future Internet Enterprise Systems; o To further define industrial scenarios for valid test case purposes for applying EI/EC services and developing new classes of EI/EC services.