☁ Could Cloud

So many people regard servers as Cloud. However, your handy device is one piece of the Cloud too no matter how tiny it is. So many tiny devices could be organized as a super computer by the Cloud operating system. 

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There is no remote storage.
There is only remote memory.

Each host swaps the senses between local memory and local storage automatically at background by themselves.

However, you also can regard there is no remote memory.

The distributed operating system swaps the senses between local memory and remote memory as cache automatically at background.

By this way, you can regard the whole network as one host.
Without this, it is not true Cloud.