Book excerpt: This Pocket Guide provides a concise explanation of the nature, content and aim of ISO/IEC 20000-1: 2011 and a short summary of ISO/IEC 20000-2:2012. It brings ISO/IEC20000 Part 1 and Part 2 within reach of a vast international audience by providing the key elements of this important standard in a short, easy to read format: it promote the awareness and the acceptability of ISO/IEC 20000 Part 1 and Part 2 as a valid standard for IT Services organizations; it supports ISO/IEC 20000 training and certification and it is a quick reference for practitioners to the core content of ISO/IEC 20000.