Software-as-a-Service (SaaS) Stack Service Service Service Finance Procurement Compliance email Collaboration CRM e-commence Document management HR management Websites Service Service Social networks Service Platform Service Service Infrastructure Internet Service Admin Service Platform-as-a-Service (PaaS) Stack Service Service Service Billing Monitoring Database Distribution Provisioning Integration Security Reporting Python, Java, NET Service Service Service Infrastructure Internet Admin Service Infrastructure-as-a-Service (IaaS) Stack Service Service Admin Service Service Virtualized resource pool Virtual storage Virtual machine Virtualization Network VMM Computer Internet Storage device