The first four chapters of the paper explain various aspects of the General Data Protection Regulation: legal, business, geopolitical and technical. Regulation has become a social phenomenon and therefore needs to be analyzed from various aspects. Under the legal aspects, a historical overview of the legal predecessors of the Regulation is given, a brief analysis of the structure of the Regulation, some specific concepts of the Regulation are explained and the obligations and powers of the legal participants in the Regulation are presented. Chapters 2 to 3 explain the business and geopolitical aspects of the Regulation by presenting the relationship of the Regulation to other current regulations and directives of the European Commission as part of the realization of the economic strategy of the European Commission. Chapter 4 defines and explains more specific technical aspects of the Regulation. Chapter 5 analyzes 6 of ISACA's business processes that establish a data protection management system. When the system is successfully managed, the company can have successfully implemented the requirements of the Regulation. The nine business processes that need to be established in a company in order for it to manage personal data security well are: corporate data management, personal data management, risk management, security management, supply chain management, incident management, maintaining awareness, maintaining internal controls and organizing employee functions for data protection. The reduced issues, scope and cost of business processes in smaller companies were emphasized. Chapter 6 makes a risk assessment of personal data in a small translation company. Referring to the tables in Appendix A, Chapter 7 provides the conclusions of the audit of the information system of the same company. The aim was to use the same recommended business processes in the audit of the application of the Regulation, which is shown in the example of the audit of a smaller company. The audit tables in Annex A also recommends security controls according to ISO / IEC 27002: 2012 for each of the 9 processes or 162 subprocesses.