What are the publications that provide guidance specific to industry sectors and organization types known as?

Service Strategy and Service Transition are two of the five core ITIL lifecycle volumes covering specific lifecycle stages, not sector-specific supplementary guidance.

The ITIL framework includes a layer of Complementary Guidance publications specifically designed to help organizations in particular industries or of particular types apply ITIL principles in contextually relevant ways. These sit outside the five core lifecycle volumes and are intended to extend and adapt core guidance.

Service Support and Service Delivery are ITIL version 2 publications and are not the set of publications providing industry-sector or organization-type-specific complementary guidance.

Pocket Guides are condensed quick-reference summaries of core content, not targeted publications for specific industries or organization types.