This textbook is intended for the novice as well as for the experienced programmer who wants to learn Modula-2. The authors do not just describe Modula-2 but instead seek to familiarize the reader with the concept of algorithms and show how to implement algorithms in Modula-2. Compared to other programming languages, Modula-2 is a compact language, which makes it easy to learn, yet it contains all important language elements necessary for formulating complicated algorithms and for implementing the modern concepts of software engineering. Modula-2 has a systematic structure that makes it possible to write easily readable programs. All this makes Modula-2 a useful instrument for an introduction to the basics of programming. This textbook strives to establish a solid foundation in the techniques of programming with up-to-date methods of program development. Use of the programming language Modula-2 is reinforced with numerous hands-on exercises. The collective experience of the authors in teaching numerous courses in this area is evident from the contents and organization of the book. The book does not presuppose any knowledge of programming, but it requires a certain ability in the realm of abstract thinking, some pleasure in problem solving, and a desire to come to terms with complex interrelationships.