Cloud computing is the availability of computer system resources, especially data storage and computing power, without direct active management by the user.

The term is generally used to describe data centers available to many users over the Internet. Large clouds, predominant today, often have functions distributed over multiple locations from central servers.

Clouds may be limited to a single organization that's called enterprise clouds, the one that is available to many organizations is public cloud, or a combination of both (hybrid cloud).

Cloud computing relies on sharing of resources to achieve coherence and economies of scale.

Advocates of public and hybrid clouds note that cloud computing allows companies to avoid or minimize up-front IT infrastructure costs. Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and that it enables IT teams to more rapidly adjust resources to meet fluctuating and unpredictable demand.

Cloud providers typically use a "pay-as-you-go" model, which can lead to unexpected operating expenses if administrators are not familiarized with cloud-pricing models.

The availability of high-capacity networks, low-cost computers and storage devices as well as the widespread adoption of hardware virtualization, service-oriented architecture, and autonomic and utility computing has led to growth in cloud computing.

Example of cloud providers are

Whogohost: whogohost.com
SmartWeb: smartweb.com.ng
Ginahosting: giniahosting.com
Bluehost: bluehost.com
Qsevers: qservers.net