The term ‘Cloud Computing’ is an oversimplified term covering many choices for how to have computers complete a task using on-line resources.  The more specific options explaining the ways to run your computing task in popular use today are:

  1. Packaged Software, difference-between-iass-paas-saas-and-packaged-software
  2. Infrastructure as a Service (IaaS),
  3. Software As A Service (SaaS), and
  4. Platform as a Service (PaaS)

These terms simply explain what portions of the IT stack you are contracting out to a web-based solution provider.  At one end is traditional packaged software, in which you are contracting nothing and at the other end of the spectrum in Software As A Service in which you are contracting everything.  This graphic from a Microsoft Azure training event I recently attended provides the most direct explanation of these services I have ever seen:

 

 

 


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