This introduction to the discipline of computer science presents the entire Modula-2 programming language at a beginning level. The authors stress the art of problem-solving on the students' part and they reveal Modula-2's ability to separate a concept from its implementation. This is one of the first books to present data abstraction in software engineering and top-down problem decomposition at an introductory level. Many program listings are contained along with the inclusion of examples and problems from many major areas of computer science. Chapter coverage includes problem solving and algorithms, simple programs and their structure, data types and control structures, subprograms, pointer variables and dynamic storage allocation, functional and data abstraction with Modula-2, recursion, scope and visibility within internal modules and problem solving using low-level programming in Modula-2.