Is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction.

Cloud computing

Explanation:

Cloud computing is a simple model or technique that is now commonly used for data sharing. It refers to easy access to a computer system resource that has network sharing system. It is used by both businesses, cooperate offices and individuals. One simple example is email  accounts. We simple login and access and retrieve the information that we want like check our emails and attached files and do not have to download any files as it is simply shared with us and is available on the cloud all the time.

we need an attachment to see what you are talking about.