This part of ISO/IEC 20000 describes the core concepts of ISO/IEC 20000, identifying how the different parts support ISO/IEC 20000-1:2011 as well as the relationships between ISO/IEC 20000 and other International Standards and Technical Reports. This part of ISO/IEC 20000 also explains the terminology used in ISO/IEC 20000, so that organizations and individuals can interpret the concepts correctly.This part of ISO/IEC 20000 is for:a) service providers considering using any part of ISO/IEC 20000 and looking for guidance on how to use the different parts of ISO/IEC 20000 to achieve their goal;b) service providers that wish to understand how ISO/IEC 20000 can be used in combination with other International Standards;c) practitioners, auditors and other parties who wish to gain an understanding of ISO/IEC 20000.