This research report is a preliminary publication of the proceedings of the European VIM project Workshop on Collaboration between Human and Artificial Societies, hold in Lanjaron (Granada), Spain, in May 1-3, . The report includes the extended abstracts of the three invited conferences by Nick Jennings, Jean-Pierre Briot and Henry Prakken, as well as the contributed papers and one full paper that were exposed at the Workshop. Main themes discussed at the workshop were: 1. Perspectives on negotiation: game theory, economics, computational dialectics. Topics: negotiation (mediation, protocols, planning), cooperative computing, computational dialectics. 2. Relevance of information: linguistics, AI, information retrieval. Topics: negotiation (synthesis of information), reflection, categorization of documents, fuzzy inference. 3. Engineering the artificial: networks, cooperative systems. Topics: correctness (protocols, compilers, execution environments), distributed systems and applications, tools and methods for distributed systems, architectures and languages. The final Proceeddings with the full papers and invited conferences will be published at the end of or early 1998.