On the structure and properties of NP-complete problems and their associated optimization problems -- A comparative review of some program verification methods -- Classification of the context-free languages -- Finite automaton from a flowchart scheme point of view -- A new type of models of computation -- Correctness of mixed computation in ALGOL-like programs -- Algebra and logic in theoretical computer science -- A survey of recent problems and results in analytic computational complexity -- Tree-structures for set manipulation problems -- Applied algorithmic logic -- Improved lower bounds on the number of multiplications/divisions which are necessary to evaluate polynomials -- Frequency algorithms and computations -- Graph-theoretic arguments in low-level complexity -- Properties of complexity classes a short survey -- A uniform approach to inductive posets and inductive closure -- Generalized probabilistic grammars -- Classes of structurally isomorphic np-optimization problems -- Pushdown-automata and families of languages generating cylinders -- Semantics of infinite processes using generalized trees -- Characterization of recognizable families by means of regular languages -- An algebraic approach to problem solution and problem semantics -- Complexity and minimality of context-free grammars and languages -- Comparison of the active visiting and the crossing complexities -- Arithmetical complexity of some problems in computer science -- Formal transformations and the development of programs -- Optimal rasp programs for arbitrarily complex 0-1 valued functions -- The expressive power of intensional logic in the semantics of programming languages -- On the complexity of equivalent transformations in programming languages -- Schematology in a MJ I/T I-language OPT imizer -- Decidability (undecidability) of equivalence of Minsky machines with components consisting of at most seven (eight) instructions -- A top-down no backtrack parsing of general context-free languages -- A probabilistic restriction of branching plans -- Reducing operators for normed general formal systems -- Invariant properties of informational bulks -- Two decidability results for deterministic pushdown automata -- On the logic of incomplete information -- Measures of ambiguity in the analysis of complex systems -- Two-level meta-controlled substitution grammars -- A calculus to build up correct programs -- Another approach for proving program correctness -- Cover results and normal forms -- On a deterministic subclass of context-free languages -- Exponential optimization for the LLP(k) parsing method -- The medial axis of a simple polygon -- Semantics and proof rules for coroutine hierarchies in block-structured programming languages -- Acceptors for iteration languages -- How good is the adversary lower bound ? -- Total correctness for procedures -- A model for retrieval systems and some mathematical problems behind -- Time and tape bounded auxiliary pushdown automata -- A fast non-commutative algorithm for matrix multiplication -- Fixed-points and algebras with infinitely long expressions, I -- On languages, accepted by machines in the category of sets -- Real time computations with restrictions on tape alphabet -- The bodnarchuk metric space of languages and the topology of the learning space -- Complexity hierarchies of oracles -- Determining processes by violations -- The influence of the machine model on the time complexity of context-free language recognition -- A generalized computability thesis -- Identification of formal languages -- Correctness of recursive flow diagram programs.