The Annual ACM Symposium on Theory of Computing (STOC), sponsored by SIGACT (the ACM Special Interest Group on Algorithms and Computation Theory), is traditionally held annually in May/June. Papers presenting original research on theoretical aspects of computer science are sought. Typical, but not exclusive, topics of interest include algorithmic graph theory, algorithms and data structures, applications of logic, biological computing, computational biology, complexity theory, cryptography, computational algebra, computational geometry, machine learning, parallel and distributed computation, and probabilistic computation.