div class=weblinks weblinks-item weblinks-link-10621 div class=weblinks-body pThe leading SaaS companies started about 10 years ago. They saw how the Internet could change how business applications are created and delivered, lifting much of the annoying details of running a data center from the customer's shoulders. They built their applications to run on a remote data center and be delivered through a browser. Both the multitenant and the distributed open-source models deliver this same SaaS experience using different architectures./p /div!--class=weblinks-body-- /div!--class=weblinks weblinks-item weblinks-link-10621--

Read more: http://www.forbes.com/2010/03/22/salesforce-amazon-google-technology-cio-network-software.html