this book constitutes the refereed proceedings of the 18th international conference on automated deduction, cade - 18, held in copenhagen, denmark, in july 2002.the 27 revised full papers and 10 system descriptions presented together with three invited contributions were carefully reviewed and selected from 70 submissions. the book offers topical sections on description logics and the semantic web, proofcarrying code and compiler verifications, non-classical logics, system descriptions, sat, model generation, casc, combination and decision procedures, logical frameworks, model checking, equational reasoning, and proof theory.