Hendler, James A.This report is a compendium of the extended abstracts submitted by participants at the 1990 AAAI Spring Symposium entitled Planning in Uncertain, Unpredictable or Changing environments. The papers concentrate on extending planning systems and/or intelligent agent architectures for use in dynamic domains. Three main themes include: the integration of planning and machine learning, the use of probabilistic and decision-theoretic information during planning, and the integration of planning with reaction.en-USAIPlanningIntelligent agent architecturesSystems IntegrationTechnical Report