What were the important developments in the military sector in 1988, and what effect did they have on peace and security? What progress was made in the attempts to control military activity and to reduce tension and the chances of war? In short, what are the prospects for a more stable international order? This twentieth edition of the SIPRI Yearbook presents detailed information on arms and arms control issues in a format that is both concise and standardized for ease of use. The Yearbooks attract world-wide attention and are used by governments, arms control negotiators, United Nations delegations, parliaments, scholars, students, the media and citizens as unique and indispensable reference works. The SIPRI Yearbook 1989 continues SIPRI's review of the latest developments in nuclear weapons, nuclear explosions, world military expenditure, the international arms trade, chemical and biological weapons, the military use of outer space, ongoing armed conflicts and European arms control, and presents the unique annual calendar of military activities required by the Stockholm Document. Efforts to control the arms race - in nuclear, chemical, biological, conventional, and space weapons - are described, and the status of negotiations and agreements is analysed. In addition to these regular features and statistics, this latest SIPRI Yearbook contains special studies on the arms trade regulations of seven weapon-exporting countries, on ballistic missile proliferation in the Third World, and on the enhanced role of the United Nations in regional conflict resolution. Its comprehensive coverage makes it an invaluable sourcebook for anyone seeking authoritative, factual information on issues of armaments and disarmament and thus to anyone interested in strategic studies, war studies, peace studies and international relations.