It seems cloud computing, for both businesses and individuals, is here to stay, but it's still not obvious to everyone what it acutally is. What are the main reasons to adopt cloud computing? People talk about IaaS, PaaS, SaaS, application deployment and provisioning, multi-cloud... but what does it all mean in basic terms and what are the advantages of cloud computing for businesses ? Well, you know what: cloud – it’s just computer power, like that big, old brick you used to have under your desk. It's a means of storing and accessing computer power via the internet, instead of via your computer hard drive.