This document discusses cloud computing, including definitions of cloud, cloud computing, and the different types of clouds. It defines cloud as a network or internet that provides remote services over public or private networks. Cloud computing refers to accessing and configuring applications online and offers data storage, infrastructure, and applications as a network service. There are four main types of clouds: public, private, hybrid, and community clouds. It also outlines the three major models of cloud computing: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).