Stockholm International Peace Research Institute. SIPRI is an independent international institute dedicated to research into conflict, armaments, arms control and disarmament. Established in 1966, SIPRI provides data, analysis, and recommendations, based on opens sources, to policymakers, researchers, media, and the interested public.

...in a field in which information often comes with an agenda, SIPRIs non-nonsense dedication to cold facts puts the tools of analysis in the readers hands, rather than pretending to have all the answers. For this reason alone, the SIPRI Yearbook is an indispensable part of the bookshelves of all those seriously interested in international security.