Few books on computers have had such a noticeable impact on the management of software development, as a HUMAN FACTOR. The unique insight of this book, which for many years kept its position on the bestseller list: the most complex problems of software development are not technological, but social. These human problems are not easy to solve, however, by solving them, you will increase the chances of success to the upper limit. In the third edition, six new chapters appeared and numerous corrections were made to the main text, so that now the book is better suited to modern development environments and contemporary problems. In particular, the pathology of leadership is discussed, which previously were not considered pathologies, the evolving culture of assembly, and the growing awareness that some of our instruments serve as anchors rather than engines. Everyone who needs to manage a software development project or an entire organization of this kind will find in the pages of this book many valuable tips.