The boundaries that divide cloud computing into defined service segments -- such as software-as-a-service, platform-as-a-service and infrastructure-as-a-service -- will eventually evolve into a single, comprehensive platform encompassing a multitude of applications and processes, an analysis by Forrester Research predicts. Early evidence of this transition can be seen in the emergence of IaaS-Plus, a model for cloud platforms pioneered by Amazon Web Services that offers enterprises more flexibility than PaaS.

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