Cloud Computing

noun · infrastructure

1.

A model for delivering computing resources (servers, storage, databases, networking) on demand via the Internet, billed by usage — eliminating physical hardware investment and offering virtually unlimited scalability.

2.

A technological paradigm that breaks computing into three service layers: IaaS (infrastructure), PaaS (platform), and SaaS (software) — enabling businesses to focus on their core mission rather than server management.

3.

A globally distributed infrastructure operated by providers like AWS, Google Cloud, and Azure, offering high availability, geographic redundancy, and regulatory compliance — now the essential foundation of modern web applications and microservices architectures.

See also
HostingSaaSScalabilitySecurity