This textbook explains the concept of "object-based programming" as an essential part of "object orientation" and elucidates why the programming language Go, developed at Google, optimally supports this concept. Using significant parts of the micro-universe, a large collection of software components (with source code totaling nearly 64,000 lines), many important data types and their algorithms are described. In the practical section, various programs constructed according to this concept are presented. The book is aimed at computer science students, pupils, and IT professionals interested in Go. Content Fundamentals of object-based development Aspects of Go The micro-universe The software lifecycle Projects and programs Author Dr. rer. nat. Dipl.-Math. Christian Maurer studied in Berlin and obtained his PhD in Mathematics from the University of Bremen. He worked as a research assistant and assistant professor for mathematics at the Free University of Berlin for an extended period. Subsequently, he briefly served as a computer science subject leader at a Berlin high school before spending many years as the head of teacher training at the Department of Mathematics and Computer Science at the Free University of Berlin. During this time, and even after retirement, he was a lecturer in computer science. The translation was done with the help of artificial intelligence. A subsequent human revision was done primarily in terms of content.