There used to be a time that your information was actually stored inside your computer. Imagine that!
Today more and more of what we do involves computers in unknown, far-away locations. Information is often not contained inside your computer, but is instead located online. This is what "cloud computing" is all about.
Cloud-based transactions (like Apple's voice activation service Siri) happen so quickly, you might not even know there are other computers involved. That's how far we've come.
John has been working with cloud based services from the beginning.