Applications are more often outsourced than infrastructure, and this is increasingly done through software as a service (SaaS). Vendors such as WebEx, Webcom, MCA Solutions, and Ariba are delivering applications as SaaS.
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different market segments, including home consumers and small, medium, and large businesses. For instance, SPO OnDemand features some of the key characteristics of SaaS software, such as Internet-based access to, and management of, commercially available software. Activities are managed from central locations rather than at each customer's site, enabling customers to access applications remotely via the Web. Still, its application delivery is not a pure SaaS model, given that it is a one-to-one or