This book is for those who have been involved in software development for a long time. Or for those who are still thinking about choosing programming as a profession. Or for those who are simply accustomed to thinking and reflecting on what is happening in the world of information technology. It is no secret that the bulk of software engineering is concentrated in the so-called corporate development sector: from complex enterprise information systems to individual applications. Therefore, a considerable part of the topics concern Enterprise Programming. From the text you are unlikely to learn how to properly glue together multi-story buildings from ready-made components in a heterogeneous environment, design interfaces, synchronize processes, or write effective queries to databases. Such topics will only serve as a background for the story about the software engineering “kitchen”. With a certain amount of curiosity, you can be convinced that the new is the well-forgotten old, learn how some complex systems work, when different technologies should be used, why computer scientists need to especially carefully filter information coming from many sources, and much more that you , perhaps you didn’t know yet or already know, but on the other hand. In the book I wanted to show our software-building world of corporate information systems development not from the front façade of descriptions of software environments, approaches and technologies, but from the inside. How well this turned out is for the reader to judge.