Many people might start their CLOUD journey from the contact with CLOUD definition. Undoubtly NIST definition is the most often referred one. For cloud specialists, of course they don't need to wonder about the details, once they already focus on a specific point. But for mass audience, many people falls into the suspicion to reach a clear view, like difference between PaaS vs IaaS, Cloud vs Virtualization, Saas vs PaaS, etc. In business planning, the people need to position themself in this...