Opening.- Specification Facets.- Hierarchies and Compositions.- Denotations and Computations.- Configurations: Contexts and States.- A Crucial Domain and Computing Facet.- Time, Space and Space/Time.- Linguistics.- Pragmatics.- Semantics.- Syntax.- Semiotics.- Further Specification Techniques.- Modularisation.- Automata and Machines.- Concurrency and Temporality.- Petri Nets.- Message and Live Sequence Charts.- Statecharts.- Quantitative Models of...