SUMARIO: What is NATO? - The principal policy and decision making institutions of the allance - The transformation of the alliance - The opening up of the allianca - The alliance s operational role in peacekeeping - The alliance s role in arms control - Programmes and activities - NATO budgests and financial management - Organisation and structures - Military organisation and structures - The military command structure - Key to organisations and agencies - The wider institutional framework for security - Parlamentary and non-governmental organisations - Appendices - List of illustrations.