Cloud computing allows users to access software and store documents on remote servers rather than a personal computer. If a computer crashes, files are still accessible from other devices through internet connections to these remote servers. Cloud services deliver computing power, infrastructure, applications, business processes, and collaboration tools to users on demand from any location via the internet. Cloud models include public clouds where infrastructure is run by external providers, private clouds where a company manages its own infrastructure, and hybrid clouds that combine internal and external storage of different types of data.