A mail client is a separate piece of software that’s run on your server to handle your mail. It stores mail on your allocated server space and can come as apart of your hosting package but is managed within its own application using its own technology.
Where we previously held all of our data on hard drives in a secured location within our vicinity (our PC), cloud storage allows us to hold storage in a virtual space online (basically on a server or many) and gain access to our content anywhere. Cloud itself works on the premise of using several servers on the fly so space and access could be considered as more economical for the provider and easily obtainable for the user.
Is like a home grown internet, allowing users to create their own servers and network from any computers to share files between them. Its been available but became commercially popular with likes of napster and then evolved into…
It works similarly to p2p, just more sophisticated. Rather then storing or sourcing one file it just holds data to and about a file so it can grab it from several sources at once.
Sold as service:
Quite possibly the Viagra of the internet, it allowed buyable products to be turned into services. Everything from entertainment to business services and information has slowly turned into a “sold as a service” offering.
Keeping all of the above in mind, there’s a lot of data floating about. Our shopping preferences, habits, interests, bank details and our lives could be pieced together online. Security has always been an issue but you can protect yourself to an extent with security software which can monitor activity but also provide restraints on who can access it along with encryptions.