Much like other software, SaaS can also take advantage of Service Oriented Architecture to let software applications communicate with each other. Each software service can act as a service provider, exposing its functionality to other applications via public brokers, and can also act as a service requester, incorporating data and functionality from other services. Enterprise Resource Planning (ERP) Software providers leverage SOA in building their SaaS offerings.
Software as a secure service (SaSS) is a variation of SaaS that provides security in the link to the service, content storage on the service, and non-proprietary format data backups and restores of data stored on the service.
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