Oracle's virtual machine service providing scalable compute resources. Like renting a powerful computer in Oracle's data center that you can configure for any workload.
Enterprises use OCI Compute Instances to run Oracle databases and enterprise applications in the cloud.
All four services provide on-demand virtual machines (instances) with selectable CPU, memory, storage, and networking. They differ mainly in instance shapes/families, pricing models, and ecosystem integrations, but the core concept—renting a VM in the provider’s data center—is equivalent.