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Software as a service (SaaS / s æ s / [1]) is a cloud computing service model where the provider offers use of application software to a client and manages all needed physical and software resources. [2] Unlike other software delivery models, it separates "the possession and ownership of software from its use". [3]
Software as a service (SaaS / s æ s / [63]) is a cloud computing service model where the provider offers use of application software to a client and manages all needed physical and software resources. [64] Unlike other software delivery models, it separates "the possession and ownership of software from its use". [65]
The NIST's definition of cloud computing defines Software as a Service as: [2] The capability provided to the consumer is to use the provider's applications running on a cloud infrastructure. The applications are accessible from various client devices through either a thin client interface, such as a web browser (e.g., web-based email), or a ...
Hybrid SaaS refers to a deployment model where a software application is delivered as a service and combines elements of both on-premises and cloud-based infrastructure. In this model, some components or data reside on the customer's local infrastructure (on-premises) while others are hosted in the cloud.
It is enabled by software as a service (SaaS). [1] Like all "as a service" (aaS) technology, DaaS builds on the concept that its data product can be provided to the user on demand, [ 2 ] regardless of geographic or organizational separation between provider and consumer.
According to The NIST Definition of Cloud Computing, [3] there are three service models associated with cloud computing: infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS). The concept of ITaaS as an operating model is not limited to or dependent on cloud computing.
The application software resides on the vendor's system and is accessed by users through a communication protocol.Alternatively, the vendor may provide special purpose client software.
This is in contrast to SaaS, where users buy a subscription and where the software is centrally hosted. One example of software as a product has historically been Microsoft Office, which has traditionally been distributed as a file package using CD-ROM or other physical media or is downloaded over network.