This guide is divided into two parts. Part A focuses on disability-inclusive development principles and Part B focuses on disability inclusion across a range of development sectors or program areas. ?? Part A provides the context and guiding principles around disability-inclusive development. It addresses the reasons why disability is a cross-cutting development issue and provides principles on how to include a disability perspective in mainstream development programs. ?? Part B provides specific information and practical steps for mainstreaming disability into a range of program areas and sectors. A reader should not necessarily need to read the entire guide. Rather, some sections will be more relevant to individual users than others. This will depend on background, experience and which sectors are the focus of a program. Part B chapters have been written in such a way as to stand alone, offering resources for specific applications.