Cloud computing is what you get when software applications and data are stored and run on the Internet. It allows for on-demand access to computing resources like apps and data storage. Public cloud is shared across organizations, while private cloud is dedicated to a single organization. Cloud service providers (CSPs) such as Amazon Web Services and Microsoft Azure host these resources. Customers rent or pay a subscription to use the infrastructure and tools provided by these and other companies. Cloud subsectors include infrastructure as a service (IaaS), platform as a service (PaaS), cloud management and security, and software as a service (SaaS). We cover SaaS on our software and SaaS webpage.