This book deals with the most important topics related to the establishment and operation of a small to medium-sized enterprise. Emphasis is placed on the analysis (theoretical and empirical) of tools necessary for the daily activities of the business, such as the business plan, SWOT analysis, financial indicators, investment evaluation, sources of financing, etc. At the same time, specialized topics are presented, such as International Accounting Standards, risk management, exit strategies, e-commerce, etc. The analysis of the topics is accompanied by examples (case studies) from business sectors that are at the forefront of developments.