Invited Papers -- Two Philosophical Applications of Algorithmic Information Theory -- Covering and Secret Sharing with Linear Codes -- Combinatorial Problems Arising in SNP and Haplotype Analysis -- Cellular Automata and Combinatoric Tilings in Hyperbolic Spaces. A Survey -- Generating Gray Codes in O(1) Worst-Case Time per Word -- Contributed Papers -- Listing Vertices of Simple Polyhedra Associated with Dual LI(2) Systems -- Automatic Forcing and Genericity: On the Diagonalization Strength of Finite Automata -- On the Order Dual of a Riesz Space -- A Finite Complete Set of Equations Generating Graphs -- ECO Method and the Exhaustive Generation of Convex Polyominoes -- Regular Expressions with Timed Dominoes -- On Infinitary Rational Relations and Borel Sets -- Efficient Algorithms for Disjoint Matchings among Intervals and Related Problems -- On Functions and Relations -- Paths Coloring Algorithms in Mesh Networks -- Finite State Strategies in One Player McNaughton Games -- On Algebraic Expressions of Series-Parallel and Fibonacci Graphs -- Boolean NP-Partitions and Projective Closure -- On Unimodality of Independence Polynomials of Some Well-Covered Trees -- A Coloring Algorithm for Finding Connected Guards in Art Galleries -- An Analysis of Quantified Linear Programs -- An Efficient Branch-and-Bound Algorithm for Finding a Maximum Clique -- On the Monotonic Computability of Semi-computable Real Numbers.