This volume presents the proceedings of the 19thInternational Colloquium onAutomata, Languages, andProgramming (ICALP 92) in a series of meetings sponsored bythe European Association for Theoretical Computer Science(EATCS).ICALP is a broadly based conference covering all aspects oftheoretical computer science, including such topics ascomputability, automata, formal languages, term rewriting,analysis of algorithms, computational geometry,computational complexity, symbolic and algebraiccomputation, cryptography, data types and data structures,theory of databases and knowledge bases, semantics ofprogramming languages, program specification, transformationand verification, foundations of logic programming, theoryof logical design andlayout, parallel and distributedcomputation, theory of concurrency, and theory of robotics.The papers in the volume are grouped into thematic partscorresponding to their order of presentation at ICALP 92.