SUMARIO: What is NATO? - The transformation of the alliance - The opening up the alliance - The European Security and Defence Identity - The alliance's operational role in peacekeeping - The alliance's role in arms control - Policy and decision making - Programmes and activities - Common funded resources: NATO budgets and financial management - Civilian organisation and structures - Military organisation and structures - The military command structure - Key to the principal NATO committees and to the institutions of cooperation, partnership and dialogue - Key to organisations and agencies and other subordinate bodies - The wider institutional framework for security - Parliamentary and non/governmental organisations - Appendix - Illustrations - The North Atlantic Treaty