Below is a diagram that represents the Official Portfolio and the wider complementary portfolio:

The Official Portfolio includes:
The nature of the Cabinet Office core products is such that they need to be interpreted and adapted for use. As a result of feedback from the marketplace, Cabinet Office-required products include all Core products and a restricted set of derived products. These derived products include introductions to the framework(s), specific pocketbooks covering key elements of the core framework and study guides in support of the emerging qualifications.
Listings of individuals and organisations that hold active OPSI licenses, whose material is incorporated within the wider complementary portfolio, can be found on OPSI's licensees list.
FAQs regarding the Best Management Practice portfolio in general can be viewed here, whilst the Official Publisher Product Brochure can be downloaded from www.best-management-practice.com.
The latest version of the model can be downloaded here.
Best Management Practice has published the first online Common Glossary covering over 1000 IT service management and project management terms, definitions and acronyms used in the Best Management Practice portfolio of publications. Building on the individual glossaries within IT Service Management (ITIL) and Project, Programme and Portfolio Management (PPM) publications, the Common Glossary takes a consolidated approach, providing a generic definition followed by modifying detail where the interpretations of ITIL and PPM differ. Further information on the Common Glossary can be found here.
OGC (former owner of Best Management Practice) and its functions have moved into the Cabinet Office part of HM Government - www.gov.uk/cabinetoffice.
Material produced since the move has revised copyright and trademark statements reflecting Cabinet Office ownership.
Best Management Practice guidance that existed at the time of the move will continue to reference OGC until it is updated. Over time all Best Management Practice guidance will be updated and will then fully reflect Cabinet Office ownership and use the updated statements and references where applicable.