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The 198.5 Workshop on Distxibuted Artificial Intelligence (DAI) was held at Sea Ranch, California, 3 to 6 December 1985. Twentyeight participants gathered in this rugged, windswept northern California coastal village to debate the theory and practice of DAL In content, the 1985 meeting differed from prior meetings (reports on prior DAI workshops can be found in Davis 1980, 1982; Fehling and Erman 1983; and Smith 1985). First, there has been a clear movement beyond the early, classical large-grained DA1 implementation "successes": HEARSAY, the contract net system, the University of Massachusetts (UMASS) distributed vehicle monitoring test bed, and the Rand Corporation air traffic control (ATCJ and remotely piloted vehicles (RPV) studies. The earlier work introduced several problem-solving architectures--the contract-net negotiation framework, the blackboard-based distributed HEARSAY framework, and the hierarchical versus anarchic control regimes developed at Rand, for example--and developed principles for cooperation and organization. New experimental research is refining these architectures and control strategies and providing frameworks for integrating heterogeneous strategies.