Software-as-a-service (SAAS) refers to the concept of a hosted solution. The vendor (Salesforce in this case), owns and maintains the servers, software, and everything else that is required to keep the system up and running. The customer purchases licenses to use the product, and connects to the software through the internet. The beauty of this model is that the customer no longer has to maintain the IT infrastructure. The downside is that it can be more expensive long-term than the client/server model, and requires a constant internet connection.
Platform-as-a-service (PaaS) refers to the end-to-end development and release of an application through the web. For instance, I would design a custom app for Salesforce.com and release it to my users entirely through my web browser.
Both SaaS and PaaS are examples of cloud computing. The gist of cloud computing is that the server(s) is hosted on the internet (also known as the cloud).
Platform-as-a-service (PaaS) refers to the end-to-end development and release of an application through the web. For instance, I would design a custom app for Salesforce.com and release it to my users entirely through my web browser.
Both SaaS and PaaS are examples of cloud computing. The gist of cloud computing is that the server(s) is hosted on the internet (also known as the cloud).
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