This document provides an overview of cloud computing. It discusses why organizations use cloud computing by describing the disadvantages of maintaining their own servers, including high costs and inefficient use of resources. The document defines cloud computing as using remote servers over the Internet rather than local servers. It outlines the main cloud models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). The document also briefly describes the public, private, and hybrid deployment models and lists some major cloud providers before concluding with a demonstration.