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SaaS: software in the Cloud
SaaS offers a pay-as-you-go model for software, with anytime, anywhere access from any device. SaaS solutions are an ideal replacement for high-value, low-complexity applications hosted on premise.
In the Software as a Service (SaaS) approach, applications are delivered over the Internet in the form of service. Rather than installing and maintaining the software, one simply needs to access the software over the Internet.