This document provides an introduction to cloud computing. It discusses key components of IT including server technology, storage technology, and computer networks. It then defines cloud computing and describes the different types of cloud computing including public cloud, private cloud, hybrid cloud, and community cloud. It also outlines the main service models of infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS). Finally, it discusses some advantages of cloud computing such as agility, accessibility via APIs, device and location independence, and security.