Through two case studies and tasks with solutions, the textbook introduces business informatics and highlights its importance for companies. It has been updated and revised in its fifth edition. New chapters on data science and ethics in digitalization have been added. The proven concept of case-based learning has been maintained and expanded. In addition to the example company "Sonnenschein AG," which illustrates IT issues from the perspective of a service company, the IT perspective of a manufacturing industrial company is explained through "Luminous GmbH." For educators, the online offerings have been further expanded. The website for the textbook provides extensive e-learning materials for each learning unit (WBT, multiple-choice questions, etc.) available for download, which can be easily integrated into Moodle.