This book constitutes the refereed proceedings of the Second International Workshop on Cooperative Information Systems, CIA'98, held in cognition with Agents World in July 1998 in Paris. The book presents nine invited contributions together with 14 revised full papers selected from a total of 54 submissions. The book is divided in parts on systems and applications; issues of design, querying, and communication; rational cooperation and electronic commerce; adaptive and collaborative information gathering; and mobile information agents in the internet.