Papers presented at the Marktoberdorf Summer School on Theoretical Foundations of Programming Methodology, organized under the auspices of the Technical University Münich and sponsored by the NATO Scientific Affairs Division, Germany, 1981

I: Program Development and Verification.- Smoothsort, an Alternative for Sorting in Situ.- Lambek and Moser Revisited.- A General Axiom of Assignment.- Assignment and Linked Data Structures.- A Proof of the Schorr-Waite Algorithm.- Verification of Sequential Programs: Temporal Axiomatization.- Specification and Derivation of Programs.- Repaying Our Debts.- II: Denotational Semantics.- Lectures on a Mathematical Theory of Computation.- Semantic Models.- III: Abstract Data Types.- Algebras, Theories and Freeness: An Introduction for Computer Scientists.- An Analysis of Semantic Models for Algebraic Specifications.- IV: Infinite Structures.- Fundamental Properties of Infinite Trees.- Behaviors of Processes and Synchronized Systems of Processes.- V: Concurrent Programs.- A Tutorial on the Split Binary Semaphore.- A Fixed Point Approach to Applicative Multiprogramming.- Discrete Event Simulation Based on Communicating Sequential Processes.- Structure of an Operating System.