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When we hear that something is "in the cloud", what that's actually referring to is a repository (such as large datacenters) where software applications and files are housed and made available through an Internet connection. In other words, when you log in to your Facebook account and upload a photo to your profileInstagram, you're essentially accessing and storing the photo in a cloud-based service, also know as a SaaS (Software as a Service) model. Other popular ones include Flickr, Gmail, and Salesforce.

What IS a cloud?

Technically, a computing cloud is a group of servers networked together with the following two characteristics: