Executive Summary

Software as a Service (SaaS), also known as on-demand computing, is changing the landscape of information technology in a profound way. By replacing locally managed stacks of networking, hardware, and software resources with an Internet-based utility, this model has changed how business applications are delivered, bringing new levels of ease, adoption, and success to the challenging area of enterprise software. And just as the evolution of the Internet affects almost all industries, the evolution of the on-demand model promises to change enterprise technology and to offer new opportunities for IT productivity and impact.

Perhaps the most important new area of on-demand computing is the introduction of a complete application ...

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