The main classes of organic compounds, their structure, isomerism, physical and chemical properties, methods of production and areas of application are considered. The material is selected taking into account the most important achievements of organic chemistry in recent years and is summarized in the form of drawings, tables and diagrams. Recommended for a wide range of readers: secondary school students with in-depth study of chemistry, applicants, students of secondary specialized educational institutions of chemical and biomedical profile. It can also be useful for Russian and foreign university students studying organic chemistry, and chemistry teachers in preparation for classes.