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SaaS, or Software as a Service, is a computing distribution model the place businesses lease online software instead of buying and installing it on their own computers. SaaS is a fundamental concept behind centralized computing where organizations rent their computing software from a host. All the processing work is accomplished on the Internet, with users accessing their tools and files utilizing a web browser.  
  
Software as a Service refers to applications which can be hosted by a vendor or service provider and made available to customers over a network, typically the Internet. SaaS is becoming an more and more prevalent delivery model as underlying applied sciences that help Web services and repair-oriented architecture (SOA) mature and new developmental approaches, corresponding to Ajax, grow to be popular. On the identical time, high-bandwidth broadband service has change into more and more available to assist user access from more areas across the world.  
  
SaaS is carefully related to ASP (application service provider) and on demand computing software delivery models. IDC identifies slightly totally different delivery models for SaaS. The hosted application management (hosted AM) model is much like ASP: a provider hosts commercially available software for patrons and delivers it over the Web. Alternatively, within the software on demand model, the provider provides clients network-based access to a single copy of an application created specifically for SaaS distribution.  
  
Benefits of the SaaS model embrace:  
  
• simpler administration  
  
• automated updates and patch management  
  
• compatibility: All customers have the same version of software  
  
• simpler collaboration, for the same reason  
  
• world accessibility  
  
• affordability: organizations will pay for computing power then need without having to buy costly hardware and software  
  
In distinction to SaaS, the traditional model of software distribution, in which software is bought and installed on personal computers, is typically referred to as software as a product.  
  
SaaS describes the enterprise model of customers logging right into a centralized web host to access their software products. Customers open their files and software only while online. With this model, companies don't want networking equipment or a large IT staff with a purpose to develop and keep it. All a corporation wants is their personal computer systems and an Internet connection, the host provides everything else together with the hardware, software, and support staff.  
  
To summarize, SaaS provides access to software and its functions remotely as a Web-based service. Software as a Service also permits organizations to access business functionality at a price typically less than paying for licensed applications since SaaS pricing relies on a month-to-month fee. Additionally, because the software is hosted remotely, companies shouldn't have to spend money on additional hardware. Software as a Service removes the necessity for organizations to handle the installation, set-up and day by day upkeep and maintenance. Software as a Service is sometimes referred to as merely hosted applications. With the quite a few benefits the SaaS model provides, it is changing into an more and more well-liked option for businesses moving into cloud computing.  
  
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