Software as a Service (SaaS): A cloud computing model where software applications are hosted and delivered over the internet, allowing users to access and use them through a web browser or mobile app without the need for local installation or maintenance.
Infrastructure as a Service (IaaS): A cloud computing model that provides on-demand access to fundamental computing resources, such as virtual machines, storage, and networking, allowing users to rent these resources instead of purchasing and managing their own hardware.
Platform as a Service (PaaS): A cloud computing model that provides a platform for developing, testing, and deploying applications, including the underlying infrastructure, operating systems, and middleware, allowing developers to focus on building their applications without managing the underlying technology.