In celebration of UNIDIR's twenty-fifth anniversary, this special double issue of Disarmament Forum focuses on a topic of long-standing interest at UNIDIR—small arms and light weapons. With the preparations for the 2006 Review Conference on the Programme of Action well under way, the contributors to this Disarmament Forum hope to give governments, international organizations, researchers and the non-governmental community a wealth of ideas and reflections that will help to shape the implementation of the PoA over the next five years—and beyond. This double issue features UNIDIR researchers and partners who are specialists in the small arms field. Authors look at the history of the PoA itself and its current state, special processes and cooperative frameworks that have developed to support the PoA, additional negotiations, and regional aspects of the small arms issue.