This volume presents the proceedings of the Computer ScienceLogic Workshop CSL '92, held in Pisa, Italy, inSeptember/October 1992. CSL '92 was the sixth of the seriesand the first one held as Annual Conference of the EuropeanAssociation for Computer Science Logic (EACSL). Fullversions of the workshop contributions were collected aftertheir presentation and reviewed. On the basis of 58 reviews,26 papers were selected for publication, and appear here inrevised final form. Topics covered in the volume include: Turing machines,linear logic, logic of proofs, optimization problems, lambdacalculus, fixpoint logic, NP-completeness, resolution,transition system semantics, higher order partial functions,evolving algebras, functional logic programming, inductivedefinability, semantics of C, classes for a functionallanguage, NP-optimization problems, theory of types andnames, sconing and relators, 3-satisfiability, Kleene'sslash, negation-complete logic programs, polynomial-timeoracle machines, and monadic second-order properties.