The publication summarizes the author's expertise and experience in teaching of basics information system (IS), based on a structured methodology for the informatics students and for business oriented students, too. The theme starts with explanation of the basic concepts and description of IS modelling in general, followed by structured methodology, complementary by examples, outcome of the student work, and also the result of research of the pedagogical process. The explanation of the IS development is followed by an example of IS about companies which sell software products and hardware components. This IS is able to record of SW products, HW components and suppliers, record data about the companies and the important HW and SW parameters, including cost; is able to create relevant information about the stored data. Many illustrative figures and tables are included.