Object Management Group

The 2011 NIST Cloud Computing Reference Model defined three cloud service models: Infrastructure-as-a-Service (IaaS), Platform-as-a-service (PaaS), and Software-as-a-Service (SaaS). In the following decade, the suffix “as-a-service” became a popular shorthand to describe solutions offered on a pay-as-you-go basis with characteristics of elasticity and self-service procurement. This phrase has since been used for an increasing variety…