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This book is about describing the meaning of programming languages. The author teaches the skill of writing semantic descriptions as an efficient way to understand the features of a language. While a compiler or an interpreter offers a form of formal description of a language, it is not something that can be used as a basis for reasoning about that language nor can it serve as a definition of a programming language itself since this must allow a range of implementations. By writing a formal semantics of a language a designer can yield a far shorter description and tease out, analyse and record design choices. Early in the book the author introduces a simple notation, a meta-language, used to record descriptions of the semantics of languages. In a practical approach, he considers dozens of issues that arise in current programming languages and the key techniques that must be mastered in order to write the required formal semantic descriptions. The book concludes with a discussion of the eight key challenges: delimiting a language (concrete representation), delimiting the abstract content of a language, recording semantics (deterministic languages), operational semantics (non-determinism), context dependency, modelling sharing, modelling concurrency, and modelling exits. The content is class-tested and suitable for final-year undergraduate and postgraduate courses. It is also suitable for any designer who wants to understand languages at a deep level. Most chapters offer projects, some of these quite advanced exercises that ask for complete descriptions of languages, and the book is supported throughout with pointers to further reading and resources. As a prerequisite the reader should know at least one imperative high-level language and have some knowledge of discrete mathematics notation for logic and set theory.

Computers. --- Computer software. --- Software engineering. --- Theory of Computation. --- Professional Computing. --- Software Engineering/Programming and Operating Systems. --- Computer software engineering --- Engineering --- Software, Computer --- Computer systems --- Automatic computers --- Automatic data processors --- Computer hardware --- Computing machines (Computers) --- Electronic brains --- Electronic calculating-machines --- Electronic computers --- Hardware, Computer --- Cybernetics --- Machine theory --- Calculators --- Cyberspace --- Programming languages (Electronic computers) --- Computer programming. --- Computers --- Electronic computer programming --- Electronic data processing --- Electronic digital computers --- Programming (Electronic computers) --- Coding theory --- Computer languages --- Computer program languages --- Computer programming languages --- Machine language --- Languages, Artificial --- Programming

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This Festschrift volume, published in honor of Brian Randell on the occasion of his 75th birthday, contains a total of 37 refereed contributions. Two biographical papers are followed by the six invited papers that were presented at the conference 'Dependable and Historic Computing: The Randell Tales', held during April 7-8, 2011 at Newcastle University, UK. The remaining contributions are authored by former scientific colleagues of Brian Randell. The papers focus on the core of Brian Randell’s work: the development of computing science and the study of its history. Moreover, his wider interests are reflected and so the collection comprises papers on software engineering, storage fragmentation, computer architecture, programming languages and dependability. There is even a paper that echoes Randell’s love of maps. After an early career with English Electric and then with IBM in New York and California, Brian Randell joined Newcastle University. His main research has been on dependable computing in all its forms, especially reliability, safety and security aspects, and he has led several major European collaborative projects.

Engineering & Applied Sciences --- Computer Science --- Computer science. --- Microprogramming. --- Software engineering. --- Programming languages (Electronic computers). --- Operating systems (Computers). --- Computer security. --- Computers. --- Computer Science. --- History of Computing. --- Operating Systems. --- Systems and Data Security. --- Control Structures and Microprogramming. --- Software Engineering. --- Programming Languages, Compilers, Interpreters. --- Automatic computers --- Automatic data processors --- Computer hardware --- Computing machines (Computers) --- Electronic brains --- Electronic calculating-machines --- Electronic computers --- Hardware, Computer --- Computer systems --- Cybernetics --- Machine theory --- Calculators --- Cyberspace --- Computer privacy --- Computer system security --- Computers --- Cyber security --- Cybersecurity --- Electronic digital computers --- Protection of computer systems --- Security of computer systems --- Data protection --- Security systems --- Hacking --- Computer operating systems --- Disk operating systems --- Systems software --- Computer languages --- Computer program languages --- Computer programming languages --- Machine language --- Electronic data processing --- Languages, Artificial --- Computer software engineering --- Engineering --- Computer programming --- Informatics --- Science --- Protection --- Security measures --- Operating systems --- Microprogramming . --- Operating systems (Computers) --- Data protection. --- Computers—History. --- Compilers (Computer programs). --- Data and Information Security. --- Compilers and Interpreters. --- Compiling programs (Computer programs) --- Computer programs --- Programming software --- Data governance --- Data regulation --- Personal data protection --- Protection, Data

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Thousands of different programming languages exist, and many more are being created each year, yet all those involved in such work must acknowledge that it is "the highest goal of programming-language design to enable good ideas to be elegantly expressed" These are the words of Sir Charles Antony Richard Hoare, or Tony Hoare to his colleagues and friends, a man who has inspired generations of researchers in computer science. His work, grounded in practical programming, has had a profound impact on the evolution of the field. This includes the development of Hoare logic and Communicating Sequential Processes (CSP). Reflections on the Work of C.A.R. Hoare presents a comprehensive edited survey of all aspects of these subjects, with original contributions by more than 30 international leaders in the field. The book, while honoring Hoare's important contributions, assembles a collection of chapters showing the state of the art in programming languages, sequential programs, concurrency, and unified theories of programming. Topics and features: Provides a scientific biography of Tony Hoare Demonstrates a principled combination of CSP and functional programming, and a CSP semantics for the π-calculus Reviews methods for proving Hoare formulae Investigates developments in game semantics and semantics based on the state monad Examines the satisfiability problem, void safety, and issues of auxiliary variables Introduces type families in Haskell and a description of Quicksort in Orc Describes an experiment using the Tokeneer archive, and a correctness proof of cryptographic protocols based on the Shadow Security model Presents a representation of CSP as a biographical reactive system, and shows how simple entities can be related to CSP processes Discusses the problem-frames approach, and explores algebraic properties of the new programming combinators This accessible monograph is an ideal overview of theoretical and empirical evolution in programming logic and semantics of programming languages. It will serve as an invaluable resource for professionals, researchers, libraries, and students who are interested in broadening their knowledge in all of the areas covered.

Operating systems (Computers). --- Programming languages (Electronic computers). --- Computer science --- Electronic data processing --- Engineering & Applied Sciences --- Computer Science --- Electronic data processing. --- ADP (Data processing) --- Automatic data processing --- Data processing --- EDP (Data processing) --- IDP (Data processing) --- Integrated data processing --- Computer science. --- Computers. --- Computer Science. --- History of Computing. --- Automatic computers --- Automatic data processors --- Computer hardware --- Computing machines (Computers) --- Electronic brains --- Electronic calculating-machines --- Electronic computers --- Hardware, Computer --- Computer systems --- Cybernetics --- Machine theory --- Calculators --- Cyberspace --- Informatics --- Science --- Computers --- Office practice --- Automation --- Hoare, C. A. R. --- Hoare, Charles Antony Richard --- Hoare, Charles Antony Richard, --- Hoare, Tony,