This volume presents the proceedings of the fourth annualInternational Symposium on Algorithms and Computation, heldin Hong Kong in December 1993. Numerous selected paperspresent original research in such areas as design andanalysis of algorithms, computational complexity, and theoryof computation. Topics covered include:- automata, languages, and computability,- combinatorial, graph, geometric, and randomizedalgorithms,- networks and distributed algorithms,- VLSIand parallel algorithms,- theory of learning and robotics,- number theory and robotics. Three invited papers are also included.