A cloud services provider, often known as a CSP, manages a remote data center where applications, servers (both real and virtual), data storage, development tools, networking capabilities, and other computing resources are hosted. Cloud computing is the on-demand internet access to these resources. These materials are made available by the CSP in exchange for a monthly subscription fee or usage-based charges. The technology that makes clouds function is often referred to as "cloud computing." This comprises some type of virtualized IT infrastructure, such as servers, operating systems, networking, and other infrastructure that has been abstracted using specialized software to allow pooling and dividing without regard to physical hardware limits. One hardware server, for instance, could be split up into several virtual servers.