This paper contains a brief overview of Case-Based Reasoning (CBR) wit
h an emphasis on European activities in the field. The main objective
was to have a balance between brevity and expressiveness and providing
helpful pointers to the held. It identifies major open problems of CB
R associated with: retrieval/selection, memory organization, matching,
adaptation/evaluation, forgetting and, finally, integration with othe
r techniques. It is intended for readers with knowledge In the area an
d contains a list of more than one hundred references in the field.