"As-a-service" refers to a cloud computing model where a service or resource is provided over the internet on a subscription basis. This eliminates the need for users to manage or own physical infrastructure, offering convenience, scalability and cost savings. Examples include: Infrastructure-as-a-Service (IaaS): Virtual machines (compute), storage and networking. Platform-as-a-Service (PaaS): Functionality to extend applications in a “serverless” model. Software-as-a-Service (SaaS): Functionality for accomplishing line-of-business tasks, e.g. CRM, ERP, document management, etc.