The provision of appropriate information plays a crucial role in businesses and organizations, which is why they design, develop, maintain, and use information systems to ensure that employees and management have the necessary information they need to perform their tasks and make decisions.

The purpose of this text is to combine the theoretical presentation of information systems with practical exercises through the use of programs available as open-source or free. The book is structured into two parts: the first part focuses on the theoretical background of information systems, while the second part includes detailed instructions for practical exercises and understanding of the theoretical concepts developed in the first part, allowing the reader to create information systems easily and quickly.