Which cloud service lets an organization install its own operating system on a virtual machine?

Infrastructure-as-a-Service (IaaS) provides virtualized computing resources over the internet. With IaaS, organizations manage their own operating systems, applications, and data, giving them the flexibility to install custom OS images on virtual machines. This high degree of control is a hallmark of IaaS. Platform-as-a-Service (PaaS) offers a development and deployment environment, abstracting away the underlying infrastructure, including the OS. Software-as-a-Service (SaaS) provides ready-to-use applications, with users having no control over the underlying infrastructure or OS. Network-as-a-Service (NaaS) focuses on networking capabilities rather than virtual machine management or OS installation.