Introduction. Principles of Continuity. Continuity Metrics. Network Topology and Protocol Considerations for Continuity. Networking Technologies for Continuity. Processing, Load Control and Internetworking for Continuity. Network Access Continuity. Platform Continuity. Software Application Continuity. Storage Continuity. Continuity Facilities. Network Management for Continuity. Using Recovery Sites and Services. Continuity Testing. Summary and Conclusions.